Updated 2005 April 1
Further to IAUC 8179, K. Battams has reported measurements of Kreutz sungrazing comets found by D. Evans (C/2002 W9), X. Leprette (C/2002 W10 and W15), X.-m. Zhou (C/2002 W11 and W13), J. Sachs (C/2002 W12), and S. Hoenig (C/2002 W14, W16, and W17) on SOHO website images taken with the C2 coronagraph. C/2002 W9 and W12 were also observed in the C3 instrument. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2004-A03 and 2004-A05.
Comet 2002 UT R.A. (2000.0) Decl.
C/2002 W9 Nov. 22.696 15 44.7 -23 37
C/2002 W10 24.396 15 58.9 -22 13
C/2002 W11 25.079 16 02.1 -22 21
C/2002 W12 27.346 16 01.0 -26 19
C/2002 W13 27.963 16 15.4 -22 55
C/2002 W14 28.713 16 18.6 -23 06
C/2002 W15 29.064 16 21.6 -23 15
C/2002 W16 29.204 16 23.1 -23 22
C/2002 W17 29.288 16 20.7 -23 12
[IAUC 8263, 2004 January 7]
Further to IAUC 8263, K. Battams reports measures of additional Kreutz comets found by X.-m. Zhou (C/2002 X7, X10, and X12), M. Meyer (C/2002 X8), S. Hoenig (C/2002 X9), and R. Kracht (C/2002 X11) on SOHO C2 images (astrometry and orbital elements on MPEC 2004-A36).
Comet 2002 UT R.A. (2000.0) Decl.
C/2002 X7 Dec. 1.329 16 30.3 -23 30
C/2002 X8 5.271 16 48.3 -24 09
C/2002 X9 5.288 16 50.7 -24 18
C/2002 X10 5.564 16 49.7 -24 10
C/2002 X11 8.963 17 05.7 -24 37
C/2002 X12 9.564 17 08.2 -24 38
[IAUC 8264, 2004 January 9]
Further to IAUC 8264, K. Battams reports measures of additional Kreutz comets found by T. Hoffman (C/2002 X13), J. Sachs (C/2002 X14), S. Hoenig (C/2002 X15), and R. Kracht (C/2002 Y3) on SOHO C2 images; C/2002 X14 was also visible in C3-coronagraph images. Astrometry and orbital elements appear on MPEC 2004-A40.
Comet 2002 UT R.A. (2000.0) Decl.
C/2002 X13 Dec. 3.071 16 37.3 -24 31
C/2002 X14 10.863 17 09.9 -28 03
C/2002 X15 13.663 17 27.2 -25 03
C/2002 Y3 18.538 17 49.9 -25 13
[IAUC 8266, 2004 January 12]
Further to IAUC 8266, K. Battams reports measures of additional Kreutz comets found by X. Leprette and M. Oates (C/2002 X16), R. Kracht (C/2002 Y4), and R. Matson (remaining objects) on SOHO website images; C/2002 X16, C/2002 Y4, and C/2003 A4 were visible in C2-coronagraph images, while the 2003 comets were each visible in C3 images. Reduced positions and orbital elements by B. G. Marsden appear on MPEC 2004-A52.
Comet 2002 UT R.A. (2000.0) Decl.
C/2002 X16 Dec. 10.621 17 13.1 -24 48
C/2002 Y4 26.171 18 25.6 -24 50
Comet 2003 UT R.A. (2000.0) Decl.
C/2003 A3 Jan. 6.721 19 21.9 -24 43
C/2003 A4 14.904 20 10.9 -25 01
C/2003 A5 15.096 20 03.6 -23 54
[IAUC 8269, 2004 January 15]
Further to IAUC 8269, K. Battams reports measures of additional Kreutz comets found on SOHO C3 website images by M. Oates (C/2003 B2) and X. Leprette (C/2003 C1 and C/2003 D1). Reduced positions and orbital elements by B. G. Marsden appear on MPEC 2004-B34.
Comet 2003 UT R.A. (2000.0) Decl.
C/2003 B2 Jan. 10.821 20 15.4 -22 05
C/2003 C1 Feb. 3.854 21 24.7 -18 14
C/2003 D1 28.321 23 03.2 - 9 00
[IAUC 8276, 2004 January 25]
Further to IAUC 8276, K. Battams reports measures of additional Kreutz comets found on SOHO C3 website images by D. Evans (C/2003 C2, which was also visible in C2-coronagraph images), R. Kracht (C/2003 C3), and J. Sachs (C/2003 C4 and C/2003 C5). Reduced positions and orbital elements by B. G. Marsden appear on MPEC 2004-B34.
Corrigendum. On IAUC 8276, the discovery date for C/2003 B2 *should read* Jan. 18.821.
Comet 2003 UT R.A. (2000.0) Decl.
C/2003 C2 Feb. 8.433 21 57.3 -17 29
C/2003 C3 10.613 21 51.5 -15 30
C/2003 C4 13.929 22 05.6 -14 16
C/2003 C5 15.971 22 21.0 -14 19
[IAUC 8278, 2004 January 29]
Further to IAUC 8278, K. Battams reports measures of additional Kreutz sungrazing comets found on SOHO C3 website images by D. Evans (C/2003 E2), S. Hoenig (C/2003 E3), J. Sachs (C/2003 E4), M. Oates (C/2003 F3), and X. Leprette (C/2003 F4). C/2003 F3 and C/2003 F4 were also detected in C2 images. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2004-C31.
Comet 2003 UT R.A. (2000.0) Decl.
C/2003 E2 Mar. 4.154 23 14.3 - 7 28
C/2003 E3 11.446 23 41.1 - 4 28
C/2003 E4 15.529 23 55.5 - 2 51
C/2003 F3 20.196 0 20.6 - 1 26
C/2003 F4 25.404 0 29.7 + 1 03
[IAUC 8283, 2004 February 9]
Further to IAUC 8283, measurements have been reported by K. Battams (for C/2003 H12 and C/2003 J6) and by K. McGleam (remaining comets) for numerous Kreutz sungrazing comets that were found on SOHO C2 website images by R. Kracht (C/2003 F5, C/2003 H11, C/2003 J3, and C/2003 J6), X. Leprette (C/2003 G4), X.-m. Zhou (C/2003 H8 and C/2003 H9), T. Hoffman (C/2003 H10), R. Matson (C/2003 H12, C/2003 J2, and C/2003 J4), P. Shkreby (C/2003 J5), J. Sachs (C/2003 J6), and H. Otterstedt (C/2003 J7). C/2003 H12 was noted as being very faint and visible on only four images. C/2003 F5, C/2003 J6, and C/2003 J7 were also visible in C3 coronagraph images. The reduced astrometry and orbital elements by B. G. Marsden appear on the MPECs cited below.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 F5 Mar. 29.238 0 59.0 + 1 39 2004-C53 C/2003 G4 Apr. 2.438 0 53.2 + 4 21 2004-C53 C/2003 H8 22.983 2 08.4 +11 23 2004-C53 C/2003 H9 24.643 2 14.6 +11 54 2004-C53 C/2003 H10 28.976 2 30.2 +13 11 2004-C54 C/2003 H11 29.518 2 29.1 +13 02 2004-C54 C/2003 H12 30.868 2 36.9 +13 42 2004-C54 C/2003 J2 May 1.226 2 38.2 +13 51 2004-C54 C/2003 J3 5.785 2 55.1 +15 07 2004-D08 C/2003 J4 5.910 2 56.1 +15 12 2004-D08 C/2003 J5 8.288 3 04.8 +15 46 2004-D08 C/2003 J6 9.613 3 12.1 +15 47 2004-D08 C/2003 J7 14.738 3 30.5 +16 03 2004-D08[IAUC 8291, 2004 February 20]
Further to IAUC 8291, K. McGleam reports her measures of three additional Kreutz sungrazing comets found on SOHO C3 website images by J. Sachs. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2004-E28.
Comet 2003 UT R.A. (2000.0) Decl.
C/2003 T5 Oct. 8.929 12 33.6 - 7 21
C/2003 T6 9.471 12 42.3 - 7 37
C/2003 T7 9.471 12 28.7 - 7 58
[IAUC 8300, 2004 March 9]
Further to IAUC 8300, K. McGleam reports measures of additional Kreutz sungrazing comets found on SOHO C2 website images by D. Evans (C/2003 K8) and R. Kracht (remaining comets). C/2003 J8, C/2003 K7, and C/2003 K9 were also visible in C3 images. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2004-F29.
Comet 2003 UT R.A. (2000.0) Decl.
C/2003 J8 May 15.613 3 37.6 +16 14
C/2003 J9 15.688 3 32.8 +17 31
C/2003 K7 22.321 4 11.0 +15 35
C/2003 K8 22.410 3 57.9 +18 48
C/2003 K9 23.346 4 09.8 +16 49
[IAUC 8309, 2004 March 19]
Further to IAUC 8309, K. Battams reports his measures for a comet (discovery observation below) found by T. Hoffman on C2 coronagraph images posted at the SOHO website. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2004-H01. The object appears to be a member of the Meyer group (cf. IAUC 7832).
2004 UT R.A. (2000) Decl.
Apr. 10.064 1 19.6 +10 02
Battams and K. McGleam also report their measurements of
numerous Kreutz sungrazing comets found on SOHO C2 website images
by P. Shkreby (C/2003 K10 and L6), D.-h. Chen (C/2003 K11), T.
Hoffman (C/2003 K12), X. Leprette (C/2003 L3), R. Kracht (C/2003
L4, L5, L8, M1, M3, M4, and M6), M. Meyer (C/2003 L4), M. Boschat
(C/2003 L7 and M5), K. Cernis (C/2003 M1), J. Sachs (C/2003 M2),
and X.-m. Zhou (C/2003 M7). Comets C/2003 K10, C/2003 L5, C/2003
M1, C/2003 M2, and C/2003 M5 were also visible in the C3
coronagraph. The reduced astrometry and orbital elements by B. G.
Marsden appear on the MPECs cited below.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 K10 May 26.571 4 14.8 +19 00 2004-G19 C/2003 K11 27.201 4 16.4 +19 39 2004-G19 C/2003 K12 29.118 4 20.5 +19 41 2004-G19 C/2003 L3 June 2.479 4 40.4 +20 29 2004-G19 C/2003 L4 5.814 4 53.3 +20 50 2004-G19 C/2003 L5 8.929 5 08.5 +18 33 2004-G20 C/2003 L6 9.814 5 08.9 +21 13 2004-G20 C/2003 L7 13.963 5 24.4 +21 25 2004-G20 C/2003 L8 15.621 5 31.3 +21 28 2004-H20 C/2003 M1 16.154 5 33.4 +21 24 2004-H20 C/2003 M2 17.721 5 39.9 +19 51 2004-H20 C/2003 M3 17.896 5 40.1 +21 33 2004-H20 C/2003 M4 18.479 5 40.4 +21 44 2004-H21 C/2003 M5 19.071 5 42.5 +20 01 2004-H21 C/2003 M6 19.746 5 45.6 +22 00 2004-H21 C/2003 M7 20.504 5 50.3 +21 42 2004-H21[IAUC 8327, 2004 April 20]
Further to IAUC 8327, K. Battams reports his measurements of the positions of several Kreutz sungrazing comets found on SOHO C2 website images by D. Evans (C/2003 K13), X.-m. Zhou (C/2003 M8, M9, M10), X. Leprette (C/2003 M11, M12, N1), R. Kracht (C/2003 M12), and J. Sachs (C/2003 N1, N2). C/2003 N1 was also observed on C3 images. The reduced astrometry by B. G. Marsden and R. Kisala and orbital elements appear on the MPECs cited below.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 K13 May 23.910 4 02.3 +19 01 2004-H49 C/2003 M8 June 22.246 5 56.8 +21 39 2004-H49 C/2003 M9 23.169 6 00.7 +22 03 2004-H49 C/2003 M10 23.188 6 00.3 +21 48 2004-H49 C/2003 M11 23.329 6 01.4 +21 35 2004-H49 C/2003 M12 23.421 6 01.1 +21 41 2004-H49 C/2003 N1 July 5.763 6 49.8 +21 29 2004-H87 C/2003 N2 13.029 7 16.0 +20 11 2004-H87[IAUC 8333, 2004 April 30]
Further to IAUC 8333, K. Battams reports measurements for additional Kreutz sungrazing comets found on SOHO C3 images by J. Sachs (C/2003 O4, O5, O8), X.-m. Zhou (C/2003 O6), and M. Boschat (C/2003 O7, P1, P2). C/2003 O5 was also observed in the C2 coronagraph. The reduced astrometry by R. Kisala and orbital elements by B. G. Marsden appear on the MPECs cited below. Contrary to what was stated on IAUC 8333, C/2003 N2 was only observed in the C3 coronagraph.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 O4 July 18.446 7 35.6 +18 09 2004-H87 C/2003 O5 20.096 7 35.0 +16 46 2004-H87 C/2003 O6 24.388 7 56.9 +18 04 2004-H88 C/2003 O7 25.904 8 05.4 +18 05 2004-H88 C/2003 O8 30.138 8 21.4 +17 16 2004-H88 C/2003 P1 Aug. 2.929 8 34.3 +16 14 2004-H88 C/2003 P2 3.763 8 37.7 +16 07 2004-H88[IAUC 8334, 2004 April 30]
Further to IAUC 8334, K. Battams reports measurements for additional Meyer-group comets found on SOHO C2 images by R. Kracht (C/2004 B2 and H4), X. Leprette (C/2004 C2), and himself (C/2004 H5). The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2004-J21.
Comet 2004 UT R.A. (2000) Decl.
C/2004 B2 Jan. 28.913 20 47.9 -17 09
C/2004 C2 Feb. 4.963 21 16.7 -15 10
C/2004 H4 Apr. 16.738 1 45.4 +11 59
C/2004 H5 30.588 2 37.4 +16 13
[IAUC 8336, 2004 May 6]
Further to IAUC 8336, K. Battams reports measurements for additional near-sun comets found on SOHO images by T. Hoffman (C/2003 P3, Q1), J. Sachs (C/2003 Q2, Q3, Q5), M. Boschat (C/2003 Q4), and R. Kracht (C/2003 Q6). All but C/2003 Q1 and Q6 (C2 images only) were observed in the C3 coronagraph; C/2003 Q2 was also observed in C2 images. The reduced astrometry by R. Kisala and orbital elements by B. G. Marsden appear on MPEC 2004-J19; C/2003 Q1 and Q6 are of the Marsden group, the other comets being Kreutz sungrazers.
Comet 2003 UT R.A. (2000) Decl.
C/2003 P3 Aug. 5.763 8 44.4 +15 45
C/2003 Q1 20.913 9 51.8 +13 33
C/2003 Q2 23.638 9 38.6 + 9 43
C/2003 Q3 23.846 9 46.0 +10 14
C/2003 Q4 25.113 9 55.1 +10 11
C/2003 Q5 26.279 9 47.7 + 8 54
C/2003 Q6 26.561 10 12.9 +11 42
[IAUC 8339, 2004 May 13]
Further to IAUC 8339, K. Battams reports measurements for additional near-sun comets found on SOHO website images by M. Boschat (C/2003 Q7, Q8, S6), J. Sachs (C/2003 Q9, R3, S7, S8), X.-m. Zhou (C/2003 R2), R. Kracht (C/2003 R4, S9), K. Cernis (C/2003 R5), X. Leprette (C/2003 S5), and R. Matson (C/2003 T8, U4). C/2003 Q8, Q9, R2, R3, S5, S6, and S7 were observed only in C3 images, while C/2003 R4, S9, T8, and U4 were observed only in C2 images; the remaining comets were observed in both coronagraphs. The reduced astrometry by B. G. Marsden and R. Kisala, and orbital elements by Marsden, appear on the MPECs cited below. C/2003 U4 belongs to the Meyer group, and C/2003 R4 and S9 belong to no known group. C/2003 R5 belongs to a new group that certainly includes C/1999 R1 and probably includes C/2002 R5. The remaining objects are Kreutz sungrazers.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 Q7 Aug. 28.988 9 57.7 + 8 14 2004-J57 C/2003 Q8 29.388 10 10.8 + 8 46 2004-J57 C/2003 Q9 30.613 10 10.3 + 7 52 2004-J57 C/2003 R2 Sept. 5.388 10 38.5 + 6 24 2004-J57 C/2003 R3 8.763 10 44.9 + 4 51 2004-J57 C/2003 R4 7.021 11 01.9 + 8 01 2004-J59 C/2003 R5 8.204 11 01.2 + 6 07 2004-J59 C/2003 S5 18.388 11 20.5 + 1 12 2004-J58 C/2003 S6 18.571 11 26.5 + 1 21 2004-J58 C/2003 S7 21.363 11 34.2 + 0 03 2004-J58 C/2003 S8 25.763 11 46.7 - 1 57 2004-J58 C/2003 S9 25.021 12 01.1 + 1 08 2004-J59 C/2003 T8 Oct. 8.963 12 48.1 - 6 37 2004-J58 C/2003 U4 21.079 13 37.3 - 8 51 2004-J21[IAUC 8340, 2004 May 17]
Further to IAUC 8340, K. Battams reports measurements for additional near-sun comets found on SOHO website images by M. Boschat (C/2003 Q10, T11), X.-m. Zhou (C/2003 T9, W2), J. Sachs (C/2003 T10), X. Leprette (C/2003 U5), and M. Meyer (C/2003 Y1). C/2003 Q10 was observed only in C3 images, while C/2003 T9, T11, U5, and W2 were observed only in C2 images; the remaining comets were observed in both coronagraphs. The reduced astrometry by B. G. Marsden and R. Kisala, and orbital elements by Marsden, appear on the MPECs cited below. C/2003 W2 and C/2003 Y1 belong to the Meyer group; the remaining objects are Kreutz sungrazers.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 Q10 Aug. 25.113 9 57.0 +10 29 2004-K16 C/2003 T9 Oct. 9.746 12 51.1 - 6 48 2004-K16 C/2003 T10 Oct. 13.404 12 49.8 - 9 16 2004-K16 C/2003 T11 Oct. 15.479 13 12.5 - 9 12 2004-K16 C/2003 U5 Oct. 16.996 13 18.0 - 9 46 2004-K16 C/2003 U6 Oct. 20.638 13 20.9 -12 04 2004-K16 C/2003 W2 Nov. 29.379 16 19.3 -23 07 2004-J21 C/2003 Y1 Dec. 20.379 17 52.3 -22 21 2004-J21[IAUC 8341, 2004 May 18]
Further to IAUC 8341, K. Battams reports his measures for an apparent comet found on SOHO C3 images by J. Danaher (discovery observation below). The reductions by R. Kisala and parabolic orbital elements by B. G. Marsden (T = 2003 Oct. 21.6 TT, q = 0.519, Peri. = 234.7 deg, Node = 181.1 deg, i = 14.5 deg, equinox 2000.0) appear on MPEC 2004-K33. It is possible that C/2003 T12 has a short period and somewhat smaller perihelion distance, but the latter is limited by the minimum solar elongation of 5.3 deg; the object seems to have been too faint to show on SOHO-SWAN frames.
2003 UT R.A. (2000) Decl.
Oct. 9.431 13 00.9 -11 39
[IAUC 8344, 2004 May 25]
Further to IAUC 8341, K. Battams reports measurements for additional Kreutz sungrazing comets found on SOHO website C2 images (by X.-m. Zhou, C/2003 U7; X. Leprette, U8; M. Boschat, J. Sachs, and J. Danaher, U9); C/2003 U9 was also visible on C3 images. Sachs also found C/2003 U6 on SOHO website images. The reductions by R. Kisala and orbital elements by B. G. Marsden appear on MPEC 2004-K33.
Comet 2003 UT R.A. (2000) Decl.
C/2003 U7 Oct. 23.064 13 41.4 -12 04
C/2003 U8 25.788 13 56.1 -13 35
C/2003 U9 26.654 13 33.6 -15 21
[IAUC 8348, 2004 May 28]
Further to IAUC 8348, K. Battams reports measurements for additional Kreutz sungrazing comets found on SOHO website C2 images (by R. Kracht, C/2003 V2; M. Boschat, C/2003 V3, V4, and V5); C/2003 V3 and V5 were also visible on C3 images. The reductions by R. Kisala and orbital elements by B. G. Marsden appear on MPEC 2004-K34.
Comet 2003 UT R.A. (2000) Decl.
C/2003 V2 Nov. 1.896 14 21.9 -15 35
C/2003 V3 3.513 14 19.5 -17 14
C/2003 V4 4.938 14 33.7 -16 43
C/2003 V5 5.388 14 23.2 -20 18
[IAUC 8351, 2004 June 11]
Further to IAUC 8351, K. Battams reports measurements for additional Kreutz sungrazing comets found on SOHO website C2 images by T. Hoffman (C/2003 V6) and R. Matson (C/2003 V7). The reductions by R. Kisala and orbital elements by B. G. Marsden appear on MPEC 2004-K34.
Comet 2003 UT R.A. (2000) Decl.
C/2003 V6 Nov. 9.564 14 53.4 -18 10
C/2003 V7 11.896 15 03.5 -18 57
[IAUC 8354, 2004 June 15]
Further to IAUC 8354, K. Battams reports measurements for additional Kreutz sungrazing comets found on SOHO website C2 images by J. Sachs (C/2003 V8, W6), X.-m. Zhou (C/2003 W3, W7, X3), D. Evans (C/2003 W4), M. Boschat (C/2003 W5, X2), G. Gallina (C/2003 W8), T. Hoffman (C/2003 X1), and R. Kracht (C/2003 X4). C/2003 V8 and W6 were also visible on C3 images. The reductions and orbital elements by B. G. Marsden appear on the MPECs cited below.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 V8 Nov. 13.471 14 57.2 -21 23 2004-K54 C/2003 W3 16.561 15 23.4 -20 12 2004-K54 C/2003 W4 21.743 15 45.6 -21 32 2004-K54 C/2003 W5 22.754 15 51.7 -21 54 2004-K54 C/2003 W6 25.571 15 49.1 -26 06 2004-K55 C/2003 W7 27.326 16 10.9 -22 47 2004-K55 C/2003 W8 29.435 16 19.3 -22 58 2004-K55 C/2003 X1 Dec. 1.160 16 28.1 -23 26 2004-K55 C/2003 X2 1.561 16 32.4 -23 38 2004-K55 C/2003 X3 2.201 16 33.1 -23 39 2004-K55 C/2003 X4 4.601 16 43.7 -24 03 2004-L24[IAUC 8356, 2004 June 17]
Further to IAUC 8356, K. Battams reports measurements for additional Kreutz sungrazing comets found on SOHO website C2 images by M. Boschat (C/2003 X5, X7, Y5, Y8), X.-m. Zhou (C/2003 X6, X9, X11), T. Hoffman (C/2003 X8), X. Leprette (C/2003 X10, Y2), R. Matson (2003 Y3, Y9, Y10), R. Kracht (C/2003 Y4, Y7), and J. Sachs (C/2003 Y6). C/2003 Y6 and Y7 were also visible on C3 images. The reductions by B. G. Marsden (and by R. Kisala for C/2003 Y8, Y9, Y10) and orbital elements by Marsden appear on the MPECs cited below.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 X5 Dec. 4.896 16 46.9 -24 12 2004-L24 C/2003 X6 6.396 16 52.2 -24 20 2004-L24 C/2003 X7 7.829 16 58.6 -24 27 2004-L24 C/2003 X8 8.246 17 00.9 -24 31 2004-L24 C/2003 X9 8.621 17 02.2 -24 34 2004-L24 C/2003 X10 11.188 17 14.5 -24 41 2004-L25 C/2003 X11 13.588 17 25.7 -24 57 2004-L25 C/2003 Y2 19.621 17 53.6 -25 08 2004-L25 C/2003 Y3 19.979 17 55.0 -25 02 2004-L25 C/2003 Y4 20.729 17 58.8 -25 14 2004-L25 C/2003 Y5 22.771 18 08.5 -25 08 2004-L25 C/2003 Y6 23.571 18 14.3 -27 22 2004-L26 C/2003 Y7 24.638 18 20.0 -27 44 2004-L26 C/2003 Y8 25.288 18 19.6 -25 00 2004-L67 C/2003 Y9 25.479 18 20.7 -24 46 2004-L67 C/2003 Y10 26.064 18 23.5 -24 50 2004-L67[IAUC 8357, 2004 June 17]
Further to IAUC 8357, measurements have been reported by K. Battams (C/2003 Y11) and K. McGleam (remainder) of additional Kreutz sungrazing comets found on SOHO website images by M. Oates (C/2003 Y11), R. Matson (2003 Y12, Y14, Y15), and X.-m. Zhou (C/2003 Y13). C/2003 Y13 and Y15 were observed in C3 images, while C/2003 Y11-Y14 were all visible on C2 images. The reductions by R. Kisala and orbital elements by B. G. Marsden appear on the MPECs cited below.
Comet 2003 UT R.A. (2000) Decl. MPEC C/2003 Y11 Dec. 26.314 18 24.2 -24 51 2004-L67 C/2003 Y12 27.333 18 28.4 -24 46 2004-L68 C/2003 Y13 27.351 18 36.5 -29 21 2004-L68 C/2003 Y14 27.375 18 29.1 -24 44 2004-L68 C/2003 Y15 31.870 18 53.8 -25 06 2004-L68[IAUC 8358, 2004 June 18]
Further to IAUC 8358, K. Battams reports measurements for additional near-sun comets found on SOHO coronagrapic images (and K. McGleam for C/2004 B4 and B5). Given below are comet designation, the date/time and position for the first available observation, the instrument(s) in which the comet was observed, the person who first found the comet on SOHO website images (JS = J. Sachs; TH = T. Hoffman; XZ = X.-m. Zhou; SH = S. Hoenig; JD = J. Danaher; MB = M. Boschat; RK = R. Kracht; DC = D. Chen; KC = K. Cernis), and the MPECs containing the reductions by R. Kisala and orbital elements by B. G. Marsden. All are Kreutz sungrazers -- except C/2004 A3 and B3, which belong to the Kracht group, and C/2004 E2, which belongs to no known group. Note that the finder of C/2004 D3 was given erroneously on MPEC 2004-D14.
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 A2 Jan. 9.821 19 44.7 -27 15 C3/2 JS 2004-M04 C/2004 A3 15.996 19 54.3 -20 28 C2 TH 2004-M04 C/2004 B3 18.163 20 03.6 -19 57 C2 XZ 2004-M04 C/2004 B4 18.279 20 14.3 -23 21 C3 JS 2004-M04 C/2004 B5 19.446 20 19.7 -22 30 C3 SH 2004-M04 C/2004 B6 21.221 20 24.7 -21 54 C3 JD 2004-M10 C/2004 B7 21.363 20 29.3 -22 52 C3 MB 2004-M10 C/2004 B8 24.971 20 41.3 -20 59 C3 TH 2004-M10 C/2004 B9 25.738 20 48.7 -21 07 C3 MB 2004-M10 C/2004 B10 30.138 21 04.3 -19 22 C3 SH 2004-M10 C/2004 C3 Feb. 3.779 21 27.7 -19 05 C3 RK 2004-M13 C/2004 C4 8.071 21 38.7 -16 17 C3 XZ 2004-M13 C/2004 C5 8.929 21 40.4 -15 48 C3 TH 2004-M13 C/2004 C6 10.071 21 47.7 -15 44 C3 TH 2004-M13 C/2004 C7 13.571 22 04.3 -15 44 C3 RK 2004-M13 C/2004 C8 14.404 22 02.7 -14 05 C3 DC 2004-M13 C/2004 D2 25.013 22 54.6 -10 42 C3 TH 2004-M14 C/2004 D3 25.113 22 56.2 -10 42 C3 XZ 2004-M14 C/2004 D4 26.891 23 07.5 -10 19 C3/2 JS 2004-M14 C/2004 E1 Mar. 9.363 23 33.5 - 4 52 C3 KC 2004-M42 C/2004 E2 12.314 23 24.2 - 3 52 C2 RK 2004-M42 C/2004 E3 14.821 23 57.8 - 2 58 C3 RK 2004-M42 C/2004 E4 15.821 0 02.5 - 2 36 C3/2 SH 2004-M42 C/2004 F5 17.405 0 09.6 - 2 12 C3/2 RK 2004-M43[IAUC 8365, 2004 July 1]
Continuation to IAUC 8365 (XL = X. Leprette):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 F6 Mar. 22.351 0 37.1 - 0 47 C3/2 SH 2004-M43 C/2004 F7 26.079 0 33.2 + 1 34 C3/2 XZ 2004-M43 C/2004 G3 Apr. 2.976 1 01.2 + 3 53 C3/2 XZ 2004-M65 C/2004 G4 3.995 1 11.5 + 4 37 C3/2 XZ 2004-M65 C/2004 G5 10.754 1 26.9 + 7 35 C2 TH 2004-M65 C/2004 G6 11.788 1 30.6 + 7 58 C2 RK 2004-M65 C/2004 G7 13.868 1 37.9 + 8 36 C2 JS 2004-M65 C/2004 G8 13.935 1 38.6 + 8 41 C2 JS 2004-M65 C/2004 G9 15.618 1 44.7 + 9 15 C2 JS 2004-M65 C/2004 H7 18.824 1 56.0 +10 20 C2 RK 2004-M66 C/2004 H8 19.089 1 56.5 +10 22 C2 TH 2004-M66 C/2004 H9 19.196 1 55.4 +10 14 C2 MB 2004-M66 C/2004 H10 30.185 2 35.6 +13 33 C2 XZ 2004-M66 C/2004 J1 May 2.785 2 47.0 +14 29 C2 TH 2004-M71 C/2004 J2 4.601 2 53.9 +14 59 C2 MB 2004-M71 C/2004 J3 4.685 2 54.0 +15 00 C2 XL 2004-M71 C/2004 J4 5.118 2 54.5 +17 00 C2 RK 2004-M71 C/2004 J5 6.129 2 58.8 +15 19 C2 XZ 2004-M71 C/2004 J6 7.171 3 03.0 +15 38 C2 TH 2004-M71 C/2004 J7 8.685 3 08.2 +15 57 C2 XZ 2004-M71 C/2004 J8 10.654 3 27.0 +14 44 C3/2 MB 2004-M72 C/2004 J9 10.754 3 16.8 +16 33 C2 RK 2004-M72 C/2004 J10 11.471 3 24.2 +15 51 C3/2 SH 2004-M72 C/2004 J11 12.768 3 24.5 +17 02 C2 RK 2004-M72 C/2004 J12 12.743 3 23.8 +18 59 C2 RK 2004-N04 C/2004 J13 13.685 3 27.5 +19 12 C2 RK 2004-N04 C/2004 J14 14.171 3 29.5 +17 17 C2 TH 2004-N04 C/2004 J15 14.601 3 31.6 +19 28 C2 RK 2004-N05 C/2004 J16 14.925 3 32.9 +19 33 C2 TH 2004-N05C/2004 J5 was also found by Hoffman. Marsden performed the reductions for C/2004 F6, which was a bright comet showing a short tail in both C3 and C2 images. All are Kreutz comets except for the following Kracht-group members: C/2004 J4, J12, J13, J15, and J16. C/2004 J4 and J12 were also fairly bright, fading gradually as they neared the sun. [IAUC 8366, 2004 July 2]
Continuation to IAUC 8366 (DE = D. Evans; MM = M. Meyer; VB = V. Bezugly):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 J17 May 15.435 3 34.6 +19 38 C2 RK 2004-N05 C/2004 J18 15.561 3 35.7 +19 43 C2 RK 2004-N05 C/2004 J19 14.671 3 31.1 +17 29 C2 DE 2004-N16 C/2004 K4 18.410 3 45.5 +18 11 C2 RK 2004-N16 C/2004 K5 20.201 3 52.1 +18 33 C2 XZ 2004-N16 C/2004 K6 21.743 3 58.1 +18 48 C2 MB 2004-N16 C/2004 K7 23.088 4 03.2 +19 03 C2 DC 2004-N16 C/2004 K8 24.326 4 06.7 +19 11 C2 MM 2004-N16 C/2004 K9 24.826 4 09.2 +19 21 C2 VB 2004-N17 C/2004 K10 25.311 4 11.3 +19 26 C2 MM 2004-N17 C/2004 K11 27.726 4 20.8 +19 47 C2 XZ 2004-N17 C/2004 K12 30.446 4 33.0 +19 27 C3/2 RK 2004-N17All are Kreutz comets except for C/2004 J17 and J18, which are Kracht-group members. Corrigendum: On IAUC 8365, line 12, *FOR* 2004-D14. *READ* 2004-M14. [IAUC 8367, 2004 July 2]
Continuation to IAUC 8367 (BZ = B. Zhou):
Comet 1996 UT R.A.(2000)Decl. Inst. F MPEC C/1996 L2 June 15.435 5 25.5 +20 06 C3 XL 2004-P15 C/1996 M3 20.612 5 50.8 +21 11 C3 XL 2004-P15 Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 L3 June 5.076 4 53.1 +20 49 C2 RK 2004-O04 C/2004 L4 7.916 5 04.2 +21 04 C2 XZ 2004-O04 C/2004 L5 8.185 5 04.8 +21 03 C2 BZ 2004-O04 C/2004 L6 9.588 5 10.4 +21 23 C2 XZ 2004-O04 C/2004 L7 9.596 5 08.8 +20 19 C3/2 RK 2004-O04 C/2004 L8 10.554 5 13.3 +20 27 C3/2 KC 2004-O05 C/2004 L9 10.976 5 15.9 +21 16 C2 XZ 2004-O05 C/2004 L10 13.671 5 22.1 +23 16 C2 RK 2004-O05 C/2004 L11 15.338 5 30.9 +21 48 C2 TH 2004-P12 C/2004 M1 18.033 5 42.8 +21 32 C3/2 RK 2004-P12 C/2004 M2 24.888 6 09.1 +20 33 C3/2 JS 2004-P12 C/2004 M3 26.392 6 15.9 +21 40 C2 DC 2004-P12 C/2004 M4 26.967 6 17.6 +21 41 C3/2 TH 2004-P13 C/2004 M5 27.558 6 20.6 +21 45 C2 TH 2004-P13 C/2004 M6 27.558 6 20.6 +21 44 C2 XL 2004-P13 C/2004 M7 27.883 6 21.2 +21 54 C2 TH 2004-P13All of the above comets are Kreutz sungrazers except for C/2004 L10 (which is a Kracht-group member). [IAUC 8380, 2004 August 5]
Continuation to IAUC 8380 (all Kreutz sungrazers):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 N1 July 1.300 6 35.0 +21 46 C2 XZ 2004-P19 C/2004 N2 1.821 6 35.4 +20 30 C3/2 JS 2004-P19 C/2004 N3 5.488 6 47.5 +19 50 C3/2 JS 2004-P19 C/2004 N4 7.321 6 55.5 +20 25 C2 XZ 2004-P19 C/2004 N5 8.071 6 58.8 +20 18 C3/2 XL 2004-P19 C/2004 N6 9.263 7 02.9 +20 41 C3 XZ 2004-P31 C/2004 O1 16.988 7 24.4 +17 41 C3 XZ 2004-Q11 C/2004 O2 17.638 7 32.6 +18 33 C3 XZ 2004-Q11 C/2004 O3 26.071 8 07.6 +18 15 C3 XZ 2004-Q11[IAUC 8394, 2004 August 27]
Continuation to IAUC 8394 (all Kreutz sungrazers; HS = H. Su):
Comet 2002 UT R.A.(2000)Decl. Inst. F MPEC C/2002 K11 May 26.671 4 14.7 +19 39 C2 DE 2002-Q11 Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 P2 Aug. 4.096 8 41.6 +15 56 C3 DE 2004-R02 C/2004 P3 5.638 8 46.6 +15 36 C3 JS 2004-R02 C/2004 P4 6.346 8 50.3 +15 21 C3 XL 2004-R02 C/2004 P5 8.571 8 55.7 +13 21 C3 HS 2004-R02[IAUC 8398, 2004 September 4]
All of the following SOHO comets are Kreutz sungrazers except C/2004 T2 (Meyer group); continuation to IAUC 8398 (KB = K. Battams):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 P6 Aug. 13.113 9 10.2 +13 24 C3 JD 2004-T66 C/2004 P7 15.221 9 13.0 +12 19 C3 TH 2004-T66 C/2004 Q3 19.888 9 33.0 +10 50 C3 TH 2004-T66 C/2004 Q4 20.929 9 37.5 +10 35 C3 JS 2004-T66 C/2004 Q5 25.488 9 59.6 + 9 37 C3 XL 2004-T66 C/2004 Q6 26.013 9 57.9 + 9 15 C3 TH 2004-T66 C/2004 R4 Sept. 4.596 10 24.5 + 5 31 C3/2 HS 2004-T67 C/2004 R5 4.971 10 38.9 + 6 04 C3 JS 2004-T67 C/2004 R6 5.679 10 41.1 + 5 47 C3 HS 2004-T67 C/2004 R7 5.971 10 36.5 + 5 21 C3/2 KB 2004-T67 C/2004 T2 Oct. 8.998 12 55.5 - 4 31 C2 RK 2004-T76[IAUC 8419, 2004 October 16]
Further to IAUC 8419, another SOHO comet found on C3 coronagraph images, this time by H. Otterstedt ('discovery' observation below), which K. Battams has found to have peaked near mag 7 before rapidly fading over the two-day arc of observation. The astrometry (measured by Battams, reduced by B. G. Marsden), orbital elements by Marsden (T = Oct. 18.0 TT, q = 0.066 AU, i = 84 deg), and an ephemeris appear on MPEC 2004-U26.
2004 UT R.A. (2000) Decl.
Oct. 16.596 13 51.5 - 6 45
[IAUC 8423, 2004 October 24]
Additional Kreutz sungrazers (continuation to IAUC 8419 and 8423; YT = Y.-s. Tsai):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 S2 Sept.20.356 11 27.1 - 0 07 C3 KB 2004-V05 C/2004 S3 22.959 11 37.5 - 1 08 C3/2 YT 2004-V05 C/2004 S4 28.529 12 03.0 - 3 16 C3/2 HS 2004-V05[IAUC 8426, 2004 November 4]
Additional SOHO sungrazers (continuation to IAUC 8426):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 T4 Oct. 4.904 12 26.4 - 5 57 C3/2 HS 2004-V05 C/2004 T5 5.488 12 25.6 - 6 22 C3/2 RK 2004-V05 C/2004 U3 18.580 13 32.1 - 7 55 C2 KB 2004-V05C/2004 T4 and C/2004 T5 are Kreutz sungrazers, while C/2004 U3 belongs to the Meyer group. [IAUC 8427, 2004 November 4]
Additional SOHO Kreutz sungrazers (continuation to IAUC 8427; HO = H. Otterstedt, XG = X. Gao):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 T6 Oct. 10.238 12 47.0 - 8 07 C3/2 HS 2004-X23 C/2004 T7 13.431 12 49.4 - 9 59 C3/2 TH 2004-X23 C/2004 U4 17.288 13 22.8 -10 16 C2 BZ 2004-X23 C/2004 U5 21.096 13 30.2 -13 25 C3/2 HO 2004-X23 C/2004 U6 21.646 13 42.7 -12 20 C2 RK 2004-X23 C/2004 U7 22.413 13 41.8 -12 10 C2 XG 2004-X23 C/2004 U8 23.529 13 32.2 -13 59 C3/2 XL 2004-X24 C/2004 U9 24.929 13 36.8 -14 39 C3/2 TH 2004-X24 C/2004 U10 26.521 13 59.4 -13 47 C3/2 JS 2004-X24 C/2004 U11 26.904 13 42.6 -15 31 C2 HS 2004-X24 C/2004 U12 28.104 14 05.8 -14 20 C2 BZ 2004-X24[IAUC 8451, 2004 December 10]
Additional SOHO comets (continuation to IAUC 8451):
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 V6 Nov. 4.113 14 29.5 -17 16 C2 TH 2004-X72 C/2004 V7 4.146 14 33.8 -16 43 C3/2 TH 2004-X72 C/2004 V8 7.696 14 39.3 -19 12 C3/2 KB 2004-X72 C/2004 V9 7.754 14 55.8 -18 32 C2/3 HO 2004-X73 C/2004 V10 8.129 14 49.7 -16 43 C2 KB 2004-X73 C/2004 V11 8.746 14 53.3 -18 12 C2 TH 2004-X74 C/2004 V12 10.029 14 40.6 -21 18 C3/2 XL 2004-X74[IAUC 8455, 2004 December 16]
Further to IAUC 8455, all the SOHO comets announced there were Kreutz sungrazers except for C/2004 V9 and C/2004 V10, which belong to the Marsden group. Marsden adds (MPEC 2004-X73) that C/2004 V9 may be identical with C/1999 J6, with a 5.49-yr period. Also, S. Hoenig reports that he learned of the appearance of C/2004 V13 on the C3 images from J. Sachs, who evidently was the first to notice it. [IAUC 8456, 2004 December 18]
Further to IAUC 8455, following are the initial observations of additional Kreutz sungrazing comets found on SOHO website images (TS = T. Scarmato). K. Battams notes that C/2004 V15 was fairly bright with a short tail.
Comet 2004 UT R.A.(2000)Decl. Inst. F MPEC C/2004 V14 Nov. 14.096 15 11.2 -20 43 C3/2 MM 2004-Y37 C/2004 V15 15.904 15 20.6 -22 20 C3/2 TH 2004-Y37 C/2004 W1 16.254 15 24.9 -20 20 C2 TH 2004-Y37 C/2004 W2 18.513 15 31.9 -21 34 C3/2 TS 2004-Y37 C/2004 W3 19.513 15 35.6 -22 38 C3/2 RK 2004-Y38 C/2004 W4 21.785 15 49.0 -21 45 C2 BZ 2004-Y38 C/2004 W5 22.368 15 52.1 -21 51 C2 SH 2004-Y38 C/2004 W6 23.213 15 55.6 -22 05 C2 XL 2004-Y38[IAUC 8458, 2004 December 22]