Updated 2003 September 20
Further to IAUC 8032, D. Hammer reports measurements for a Meyer-group comet 2003 B1 (SOHO) found on SOHO website C2 and C3 images by X.-M. Zhou (reduced astrometry and orbital elements on MPEC 2003-C23).
2003 UT R.A. (2000) Decl.
Jan. 16.814 19 59.5 -20 22
[IAUC 8065, 2003 February 4]Further to IAUC 8065, D. Hammer reports measurements for six additional comets found on SOHO C2 website images by R. Kracht (C/2000 G3, C/2002 V4, C/2002 X6), D. Evans (C/2002 V3), and R. Matson (C/2002 V5, 2002 Y2). C/2000 G3, C/2002 V3, and C/2002 V5 were also visible in C3-coronagraph images. The reduced astrometry and orbital elements by B. G. Marsden appear on the MPECs cited below. C/2002 V4, C/2002 X6, and C/2002 Y2 are members of the Meyer group; C/2002 V5 is a member of the Marsden group; the others are Kreutz sungrazers.
Comet 2000 UT R.A. (2000) Decl. MPEC C/2000 G3 Apr. 10.404 1 27.1 + 5 57 2003-B42 Comet 2002 UT R.A. (2000) Decl. MPEC C/2002 V3 Nov. 9.179 14 50.3 -18 28 2003-B42 C/2002 V4 9.579 14 55.2 -15 36 2003-B42 C/2002 V5 11.854 15 05.5 -18 54 2003-C02 C/2002 X6 Dec. 2.314 16 32.7 -20 50 2003-C02 C/2002 Y2 19.579 17 51.0 -22 27 2003-C02[IAUC 8073, 2003 February 14]
Further to IAUC 8073, D. Hammer reports measurements for two additional Kreutz sungrazing comets found on SOHO C2 website images by K. Cernis (C/2002 V6) and R. Matson (C/2002 V7); C/2002 V6 was also visible with the C3 coronagraph. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2003-F14.
Comet 2002 UT R.A. (2000) Decl.
C/2002 V6 Nov. 13.179 15 08.2 -21 00
C/2002 V7 15.850 15 21.5 -20 07
[IAUC 8099, 2003 March 25]Further to IAUC 8099, D. Hammer reports measurements for additional Kreutz sungrazing comets found on SOHO C2 website images by X.-M. Zhou (C/2002 W1), R. Kracht (C/2002 W2, C/2002 W3), and M. Meyer (C/2002 W4). The reduced astrometry and orbital elements by B. G. Marsden appear on the MPECs cited below.
Comet 2002 UT R.A. (2000) Decl. MPEC C/2002 W1 Nov. 16.642 15 27.6 -20 36 2003-F16 C/2002 W2 17.775 15 30.7 -20 43 2003-F16 C/2002 W3 18.742 15 33.8 -20 52 2003-F18 C/2002 W4 19.535 15 37.0 -21 02 2003-F18[IAUC 8100, 2003 March 25]
Further to IAUC 8100, D. Hammer reports measurements for Kreutz sungrazing comet 2002 W5 found by S. Hoenig from SOHO C2 and C3 coronagraph website images. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2003-F45.
2002 UT R.A. (2000) Decl.
Nov. 19.696 15 27.1 -23 28
[IAUC 8103, 2003 March 31]Further to IAUC 8103, D. Hammer provides measurements for two additional Kreutz sungrazing comets found on SOHO C2 website images by R. Matson (C/2002 W6) and D. Evans (C/2002 W7). C/2002 W7 was also visible in the C3 coronagraph. Reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2003-G07.
Comet 2002 UT R.A. (2000) Decl.
C/2002 W6 Nov. 20.351 15 40.9 -21 17
C/2002 W7 21.821 15 49.0 -22 29
[IAUC 8106, 2003 April 3]COMET C/2002 W8 (SOHO) Further to IAUC 8106, D. Hammer reports measurements for Kreutz sungrazing comet 2002 W8 found on C2 and C3 SOHO website images by K. Cernis (not X.-M. Zhou, as stated on MPEC 2003-G32, where the reduced astrometry and orbital elements appear).
2002 UT R.A. (2000) Decl.
Nov. 22.346 15 48.3 -23 35
[IAUC 8111, 2003 April 8]Further to IAUC 8111, D. Hammer reports measurements for comet 2003 G3 found on C2 and C3 SOHO website images by J. Sachs. Hammer provides the following magnitudes (from C3 images and a clear filter unless noted as C2, which included an orange filter): Apr. 4.113 UT, 7.7; 4.196, 7.6; 4.279, 7.8; 4.363, 7.4; 4.446, 6.9; 4.529, 5.7; 4.564, 4.8 (C2); 4.613, 5.3; 4.621, 4.5 (C2); 4.679, 5.6; 4.685, 4.2 (C2); 4.768, 4.1 (C2); 4.838, 4.6 (C2). The reduced astrometry and parabolic orbital elements (q = 0.017 AU, Peri. = 175 deg, Node = 88 deg, i = 170 deg) appear on MPEC 2003-G63.
2003 UT R.A. (2000) Decl. m1
Apr. 4.029 1 02.5 + 7 27 7.5
[IAUC 8120, 2003 April 22]
Further to IAUC 8120, D. Hammer reports measurements for comet 2003 K3, a faint comet (mag 8-10) found by H. Otterstedt on SOHO website C3 images. The reduced astrometry, orbital elements (Peri. = 108 deg, Node = 79 deg, i = 39 deg, q = 0.14 AU), and ephemeris by B. G. Marsden appear on MPEC 2003-K46.
2003 UT R.A. (2000) Decl.
May 25.096 4 29.3 +23 24
[IAUC 8138, 2003 May 30]
Further to IAUC 8138, D. Hammer has reported astrometric measurements for several additional comets found on C2 coronagraph images at the SOHO website by R. Kracht. The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2003-P02. C/2003 H6 and C/2003 H7 are obviously related to each other; C/2003 H5 belongs to the Meyer group.
Comet 2003 UT R.A. (2000) Decl.
C/2003 H5 Apr. 27.268 2 22.6 +14 49
C/2003 H6 30.201 2 24.3 +14 23
C/2003 H7 30.129 2 24.8 +14 16
[IAUC 8178, 2003 August 8]
Further to IAUC 8178, D. Hammer has reported astrometric measurements for two additional Meyer-group comets found on C2 coronagraph images at the SOHO website by X. Leprette (C/2003 K5) and X.-M. Zhou (C/2003 K6). The reduced astrometry and orbital elements by B. G. Marsden appear on MPEC 2003-P02.
Comet 2003 UT R.A. (2000) Decl.
C/2003 K5 May 21.201 3 53.4 +21 06
C/2003 K6 30.061 4 28.5 +&23 10
[IAUC 8179, 2003 August 11]