Updated 2010 February 22
COMETS C/2006 A4-A7, B2-B4, E2, F3 (SOHO)
Additional comets have been found on SOHO website images (cf.
IAUC 8679) -- all being Kreutz sungrazers except for C/2006 B4
(Meyer group) and for C/2006 E2 and C/2006 F3 (Marsden group).
C/2006 A4 is described by K. Battams as very faint and diffuse.
C/2006 A5 had a bright coma that "evaporated" quickly in the C2
images, with a tail that "lingered for a long time", being longer
than 1 deg on Jan. 5.612 UT at about 4 solar radii; in C3 images,
the comet was still brightening when at mag perhaps -1.5 on Jan.
5.112 at 11.6 solar radii, showing a bright, thin tail, but it was
at mag about 2.9 and fading fast by the time it reached 7 solar
radii. The other comets were stellar in appearance. Peak
magnitudes: C/2006 A6, 6.3, Jan. 10.431, 10.8 solar radii; C/2006
A7, 5.8, Jan. 12.738, 11.1 solar radii; C/2006 B3, 4.3, Jan.
22.612, 10.4 solar radii. C/2006 B2 and C/2006 F3 were very small
and faint. C/2006 B4, at mag approximately 7, was slightly
elongated in the direction of motion. C/2006 E2 was extremely
faint and slightly diffuse in C2 images (stellar in C3).
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 A4 Jan. 2.904 19 04.2 -25 26 C3/2 RM 2006-F43
C/2006 A5 4.096 19 15.1 -27 53 C3/2 TH 2006-F43
C/2006 A6 10.071 19 40.1 -24 21 C3 TH 2006-F43
C/2006 A7 12.431 19 49.2 -24 12 C3 SF 2006-F43
C/2006 B2 20.321 20 22.8 -21 51 C3 HS 2006-F44
C/2006 B3 21.654 20 38.1 -23 16 C3 RK 2006-F44
C/2006 B4 26.496 20 37.2 -17 18 C2 HS 2006-F44
C/2006 E2 Mar. 15.096 23 50.5 - 1 26 C3/2 RM 2006-F50
C/2006 F3 26.101 0 23.1 + 4 13 C2 TH 2006-F50
[IAUC 8694, 2006 March 29]
I thought you would be interested in some photometry results I got from comet 2006 A5 (SOHO-1087). Peak brightness was at a distance of ~10 Rsun. At this point it was begining to show signs of saturation in the images. Unfortunatley, due to pixel values going out of range (software bug), I was only able to get C3 photometry to ~11.5 Rs. Numbers were slightly inconsistent, but I was getting values between 0 and -1 mag, which is consistent with the near-saturation I saw. Certainly one of the brightest we've seen! It entered C2 (~7Rs) in the mid-2's and faded (evaporated!) quite rapidly thereafter.
COMETS C/2006 B5, C/2006 B6, C/2006 C1-C3, C/2006 D2 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8694). C/2006 B5 and C/2006 C3 were
described by K. Battams as tiny, stellar, and extremely faint.
C/2006 B6, which was independently found by Q. Ye, was quite
condensed and slightly elongated, reaching mag 4.3 on Jan. 30.638
UT at about 10.8 solar radii. C/2006 C1 was small and stellar,
reaching mag 6.4 on Feb. 8.404 at 12.4 solar radii. C/2006 C2 was
elongated and peaked at mag about 5.5, but good photometry was not
possible due to a large data gap. C/2006 D2 was very small and
faint in C3 images, and extremely faint and diffuse in C2 images.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 B5 Jan. 26.821 20 51.6 -20 08 C3 RM 2006-J50
C/2006 B6 29.821 21 12.8 -20 29 C3 KB 2006-J50
C/2006 C1 Feb. 7.988 21 46.5 -16 41 C3 RM 2006-J50
C/2006 C2 9.513 21 58.1 -16 53 C3 SF 2006-J50
C/2006 C3 10.904 21 53.8 -15 25 C3 SF 2006-J51
C/2006 D2 16.571 22 18.6 -14 08 C3/2 HS 2006-J51
[IAUC 8712, 2006 May 18]
COMETS C/2006 D3-D6, C/2006 E3, C/2006 E4 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8712). C/2006 D3 and C/2006 D4 were
described by K. Battams as tiny, stellar, and extremely faint.
C/2006 D5 had a teardrop shape, reaching mag 5.2 on Feb. 26.738 UT
at 11.8 solar radii. C/2006 D6 and C/2006 E3 appeared stellar,
both reaching mag 4.6, on Mar. 1.358 at 11.7 solar radii and Mar.
13.399 at 11.4 solar radii, respectively. C/2006 E4 was extremely
faint (mag about 8.5) and diffuse.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 D3 Feb. 19.738 22 27.8 -12 07 C3 SF 2006-J51
C/2006 D4 21.138 22 32.9 -11 31 C3 HS 2006-J51
C/2006 D5 26.279 22 58.3 - 9 59 C3 SH 2006-K09
C/2006 D6 28.691 23 11.0 - 9 16 C3 SF 2006-K09
C/2006 E3 Mar. 12.899 23 53.4 - 4 15 C3 HS 2006-K09
C/2006 E4 15.133 23 47.2 - 2 27 C2 TH 2006-K09
[IAUC 8713, 2006 May 23]
COMETS C/2006 F5-F8 AND C/2006 G2 (SOHO)
Additional comets have been found on SOHO website images (cf.
IAUC 8713; MA = M. Mazzucato), all Kreutz sungrazers except C/2006
F6 (Meyer group). C/2005 F5 was described by K. Battams as small,
slightly diffuse, and too faint for photometry. C/2006 F6 was
condensed and quite elongated, reaching mag 7.6 on Mar. 22.993 UT
at 7.1 solar radii. C/2006 F7 and C/2006 G2 were extremely faint
and diffuse. C/2006 F8 reached mag 4.7 in C3 images on Mar. 30.571
at 12.0 solar radii; in C2 images it showed a very faint, thin tail
that reached a length of 21' on Mar. 30.922 at 5.1 solar radii,
with a possible secondary component ('lump' on the side of the head).
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 F5 Mar. 21.321 0 18.4 - 0 33 C3 MA 2006-K10
C/2006 F6 22.963 0 12.2 + 2 37 C2 TH 2006-K10
C/2006 F7 28.326 0 36.1 + 2 34 C2 RM 2006-K10
C/2006 F8 29.654 1 00.3 + 1 58 C3/2 HS 2006-K10
C/2006 G2 Apr. 11.246 1 27.0 + 7 33 C2 TH 2006-K29
[IAUC 8714, 2006 May 23]
COMETS C/2006 G3 AND C/2006 H2 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8714). C/2006 G3 was elongated and
diffuse, reaching mag 7.5 at 7.1 solar radii on Apr. 14.563 UT,
when it had an 84" tail. C/2006 H2 was tiny but slightly elongated
and too faint for photometry.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 G3 Apr. 14.526 1 38.8 + 8 38 C2 HS 2006-K29
C/2006 H2 Apr. 17.493 1 49.0 + 9 40 C2 HS 2006-K29
[IAUC 8717, 2006 June 3]
COMETS C/2006 H3-H6 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8717; AA = A. Ambrus). C/2006 H3 was
described by K. Battams as very faint, slightly diffuse, and
elongated. C/2006 H4 appeared stellar in C3 images, reaching mag
6.1 on Apr. 21.988 at 10.6 solar radii; in C2 images, it showed a
faint, thin tail that reached a length of 383" on Apr. 22.313.
C/2006 H5 was very small, slightly diffuse, and also too faint for
photometry. C/2006 H6, which was also found by H. Su, was small
and stellar in C3 images, but elongated in C2 images, where it
reached mag 6.4 on Apr. 28.603 at 6.6 solar radii.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 H3 Apr. 19.354 1 56.3 +10 16 C2 KB 2006-K29
C/2006 H4 21.404 2 15.3 + 9 44 C3/2 AA 2006-K29
C/2006 H5 24.314 2 13.8 +11 51 C2 HS 2006-K29
C/2006 H6 28.321 2 32.9 +12 34 C3/2 JS 2006-L20
[IAUC 8718, 2006 June 5]
COMETS C/2006 G3, C/2006 J1-J3, C/2006 K5 (SOHO)
Additional comets have been found on SOHO website images (cf.
IAUC 8718) -- all being Kreutz sungrazers except C/2006 K5 (no
known group). C/2006 J1 was very small, slightly diffuse, and too
faint for photometry. C/2006 J2 was small, stellar, and faint (mag
about 8.0). C/2006 J3 was slightly diffuse and reached mag 7.7 on
May 4.496 at 6.4 solar radii; it showed a 162" tail on May 4.538 at
5.9 solar radii. C/2006 K5 was extremely faint, peaking at mag
about 8.5 at May 22.196, and measurer K. Battams could only find it
in about 10 images. Corrigendum: C/2006 G3 was found by J. Sachs,
not H. Su (cf. IAUC 8717).
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 J1 May 3.213 2 44.6 +14 13 C2 HS 2006-L20
C/2006 J2 4.413 2 50.7 +14 43 C2 HS 2006-L20
C/2006 J3 4.479 2 51.5 +14 46 C2 TH 2006-L20
C/2006 K5 22.113 4 12.5 +22 43 C3 HS 2006-L20
[IAUC 8719, 2006 June 7]
COMETS C/2006 J4-J8 (SOHO)
Additional comets have been found on SOHO website images (cf.
IAUC 8719) -- all being Kreutz sungrazers except C/2006 J5 (Meyer
group). C/2006 J4 was stellar in C3 images, reaching mag 4.9 on
May 8.762 UT at 9.1 solar radii; C2 images showed a very faint tail
that reached a length of 500" on May 9.188 at 3.7 solar radii.
C/2006 J5 was very small, stellar but slightly elongated in the
direction of motion, and too faint for photometry. C/2006 J6,
which was also found by J. Sachs, was extremely faint, diffuse, and
elongated. C/2006 J7 and J8 were very close (only a few pixels
apart), the leading component (J7) being marginally larger,
brighter, and longer-lasting; both components were small and
stellar.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 J4 May 7.696 3 16.6 +13 35 C3/2 KB 2006-L31
C/2006 J5 7.979 3 03.2 +18 16 C2 HS 2006-L31
C/2006 J6 8.854 3 07.3 +15 52 C2 RM 2006-L31
C/2006 J7 10.163 3 12.1 +16 13 C2 TH 2006-L32
C/2006 J8 10.163 3 12.1 +16 13 C2 TH 2006-L32
[IAUC 8720, 2006 June 8]
COMETS C/2006 J9, C/2006 J10, C/2006 J11 (SOHO)
Three additional Kreutz sungrazing comets have been found on
SOHO website images (cf. IAUC 8720). C/2006 J9, which was also
found by T. Chen, was stellar and reached mag 7.3 on May 10.579 UT
at 5.9 solar radii. C/2006 J10 was small and diffuse, reaching mag
7.8 on May 11.204 at 6.0 solar radii. C/2006 J11 was small,
diffuse, and too faint for photometry.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 J9 May 10.564 3 13.6 +16 20 C2 HS 2006-L32
C/2006 J10 11.204 3 15.3 +16 22 C2 TH 2006-L32
C/2006 J11 11.746 3 18.1 +16 34 C2 JS 2006-L32
[IAUC 8722, 2006 June 16]
COMETS C/1997 B5-B7, 1997 O3, 1997 V8 AND V9, 1997 X7 (SOHO)
Additional comets have been found on archival SOHO website
images (cf. IAUC 8722) -- all being small and stellar in appearance,
of mag 7.5-8.0, and with no tails. C/1997 O3 and C/1997 V8 were
Kreutz sungrazers, C/1997 X7 was a Meyer-group object, C/1997 V9
belonged to no known group, and the rest belong to the Marsden
group.
Comet 1997 UT R.A.(2000)Decl. Inst. F MPEC
C/1997 B5 Jan. 29.497 20 55.5 -16 51 C2 RK 2006-C49
C/1997 B6 29.604 20 56.1 -16 49 C2 RK 2006-C49
C/1997 B7 29.647 20 56.4 -16 49 C2 RK 2006-C49
C/1997 O3 July 31.906 8 30.0 +16 55 C3 RK 2006-J44
C/1997 V8 Nov. 6.216 14 34.7 -19 27 C3 RK 2006-J44
C/1997 V9 14.240 15 13.5 -19 32 C2 RK 2006-J44
C/1997 X7 Dec. 15.413 17 32.8 -22 14 C2 RK 2006-J45
[IAUC 8724, 2006 June 22]
COMETS C/2006 J12 AND C/2006 K6 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8724; GS = G. Sun) -- both described by K.
Battams as being small and stellar in appearance, with no tails.
C/2006 K6 reached mag 6.5 on May 17.246 UT at 5.5 solar radii in C2
images.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 J12 May 15.646 3 31.6 +17 23 C2 GS 2006-M28
C/2006 K6 17.071 3 38.1 +17 24 C3/2 RM 2006-M28
[IAUC 8727, 2006 June 30]
COMETS C/1996 R5 AND C/1996 X3-X5 (SOHO)
Additional comets have been found on archival SOHO website
images (cf. IAUC 8724) -- all described by K. Battams as being
small and stellar in appearance. C/1996 R5, a Kreutz sungrazer,
peaked at mag 7.5-8.0; the other objects belong to the Kracht group,
with C/1996 X3 and C/1996 X4 peaking at mag about 7.0, and C/1996
X5 peaking at mag about 7.5.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/1996 R5 Sept. 3.821 10 34.6 + 6 14 C3 RK 2006-J44
C/1996 X3 Dec. 5.629 16 56.8 -22 39 C2 RK 2006-C49
C/1996 X4 5.813 16 57.0 -22 36 C2/3 RK 2006-C49
C/1996 X5 5.908 16 56.3 -22 32 C2/3 RK 2006-C49
COMETS C/1998 G9, 1998 L10, 1998 T2, 1998 W8 (SOHO)
The following SOHO comets (Kreutz sungrazers except for
Meyer-group member C/1998 G9) were all small and stellar in
appearance (mag 7.5-8.0), except for C/1998 L10, which was very
faint and slightly diffuse.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/1998 G9 Apr. 11.894 1 22.8 +10 12 C2 RK 2006-J45
C/1998 L10 June 2.316 4 36.9 +20 17 C2 RK 2006-J45
C/1998 T2 Oct. 14.806 13 01.2 - 9 43 C3 RK 2006-J45
C/1998 W8 Nov. 30.064 16 24.5 -23 15 C3 RK 2006-J45
[IAUC 8734, 2006 August 1]
COMETS C/1999 V5 AND C/1999 X3 (SOHO)
Further to IAUC 8734, given below are the discovery data for
additional small, stellar-appearing comets found on archival SOHO
images. C/1995 V5, a Kreutz sungrazer, was of mag about 7.5 or
fainter. C/1999 X3, not a member of any known comet group (T =
1999 Dec. 12.7 TT, q = 0.081, e = 1.0, i = 7.2 deg), was too faint
for photometry.
Comet 1999 UT R.A.(2000)Decl. Inst. F MPEC
C/1999 V5 Nov. 14.379 15 13.6 -19 34 C2 HS 2006-O20
C/1999 X3 Dec. 12.564 17 22.9 -23 22 C2 HS 2006-L20
[IAUC 8735, 2006 August 3]
COMET C/1998 J5 (SOHO)
Further to IAUC 8735, the following Kreutz-sungrazing archival
SOHO comet was diffuse, elongated, and very faint.
Comet 1998 UT R.A.(2000)Decl. Inst. F MPEC
C/1998 J5 May 12.227 3 17.5 +16 46 C2 HS 2006-L20
[IAUC 8737, 2006 August 8]
COMETS C/2006 K7-K21, C/2006 L3-L5 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8727, 8737; LC = L. Cane). C/2006 K7 is
described by K. Battams as being slightly diffuse and small,
reaching mag 8.1 on May 18.313 UT at 6.1 solar radii. C/2006 K8
was faint, quite diffuse, and too faint for photometry. C/2006 K9
was extremely faint and diffuse. C/2006 K10 was very faint,
diffuse, and slightly elongated. C/2006 K11 appeared small and
stellar in C3 images, while in C2 images it reached mag about 6.5
and had a tail that reached a length of 113" on May 23.254. C/2006
K12 was small, diffuse, and very faint. C/2006 K13 and K14 were a
fairly close pair -- both being very small and faint -- the former
(the leading fragment) being diffuse and the brighter of the two,
and the latter being slightly diffuse. C/2006 K15, K16, K18, K19,
and C/2006 L5 were all faint and slightly diffuse; C/2006 K15 and
K19 were described as tiny, the other two as small. C/2006 K17 and
K20 were diffuse, the former extremely faint and the latter very
small. C/2006 K15-20 all peaked in the magnitude range 8-9.
C/2006 K21 was small and stellar in appearance, peaking at mag
about 4.5 in C3 images at about 13 solar radii; there was a vague
hint of a tail in C2 images. C/2006 L3 was very faint and diffuse.
C/2006 L4 was tiny and slightly diffuse.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 K7 May 18.314 3 42.4 +18 00 C2 LC 2006-M28
C/2006 K8 18.898 3 45.2 +18 09 C2 BZ 2006-M28
C/2006 K9 19.913 3 47.6 +18 13 C2 RM 2006-M28
C/2006 K10 20.564 3 51.0 +18 26 C2 WX 2006-M30
C/2006 K11 22.513 4 03.3 +17 20 C3/2 HS 2006-M30
C/2006 K12 22.754 3 59.4 +18 50 C2 HS 2006-M30
C/2006 K13 24.421 4 05.8 +19 08 C2 GS 2006-M30
C/2006 K14 24.438 4 05.8 +19 09 C2 RM 2006-M30
C/2006 K15 25.004 4 07.7 +19 12 C2 TC 2006-M64
C/2006 K16 25.913 4 11.4 +19 22 C2 RM 2006-M64
C/2006 K17 25.938 4 11.5 +19 21 C2 RM 2006-M64
C/2006 K18 26.413 4 11.9 +19 24 C2 GS 2006-M64
C/2006 K19 29.300 4 23.9 +19 51 C2 HS 2006-M64
C/2006 K20 29.408 4 24.7 +19 54 C2 TC 2006-M64
C/2006 K21 29.554 4 32.8 +17 18 C3/2 VB 2006-O20
C/2006 L3 June 1.908 4 38.1 +20 21 C2 GS 2006-O20
C/2006 L4 4.592 4 48.2 +20 39 C2 WX 2006-O20
C/2006 L5 8.058 5 00.7 +20 56 C2 HS 2006-O20
[IAUC 8738, 2006 August 9]
COMETS C/2006 L6-L8, C/2006 M5-M9, C/2006 N1-N3 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8738) -- all very faint except where noted
below. C/2006 L6, C/2006 M5, C/2006 M8, and C/2006 M9 were
slightly diffuse (and generally small), while C/2006 L7, C/2006 L8,
and C/2006 M7 were diffuse. C/2006 M9 was also found by T. Chen.
C/2006 L5-L8 and C/2006 M5-M7 peaked at mag about 7.5 or fainter.
C/2006 N1 was tiny, faint, and stellar in appearance in C3 images;
in C2 images, it was diffuse and very faint with a hint of
elongation. C/2006 N2 was small and stellar in appearance, peaking
at mag about 6.5. C/2006 N3 appeared stellar in C3 images, peaking
at mag approximately 5; in C2 images, it was rather condensed with
no tail, fading rapidly.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 L6 June 8.833 5 04.9 +21 00 C2 GS 2006-O21
C/2006 L7 10.450 5 10.9 +21 07 C2 TH 2006-O21
C/2006 L8 14.617 5 27.1 +21 24 C2 HS 2006-O21
C/2006 M5 16.521 5 34.6 +21 30 C2 TC 2006-O21
C/2006 M6 19.064 5 44.4 +21 38 C2 TH 2006-O21
C/2006 M7 22.438 5 57.2 +21 40 C2 HS 2006-O21
C/2006 M8 25.064 6 07.5 +21 47 C2 HS 2006-O62
C/2006 M9 27.163 6 15.7 +21 44 C2 HS 2006-O62
C/2006 N1 July 11.821 7 12.0 +20 10 C3/2 SF 2006-O62
C/2006 N2 13.971 7 17.4 +19 55 C3 HS 2006-O62
C/2006 N3 14.363 7 19.5 +17 46 C3/2 WX 2006-O62
[IAUC 8739, 2006 August 9]
COMETS C/2006 O3-O8, C/2006 P2-P7 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8739; AK = A. Kubczak, SY = S. Yuan).
C/2006 O3-O6 were all very small and stellar in appearance, with no
tails; C/2006 O3 peaked at mag about 6.5-7, C/2006 O4 and O5 peaked
at mag about 7, and C/2006 O6 peaked at mag about 5.5-6. C/2006 O7
peaked at mag about 3.5-4 with a stubby tail in C3 images; in C2
images, it showed a a diffuse head and a very thin tail that peaked
in length at about 29'. C/2006 O8 showed a hint of elongation and
peaked at mag about 5.5. C/2006 P2 was tiny, faint, and stellar in
appearance, peaking at mag about 7-7.5. C/2006 P3 appeared stellar
with a hint of elongation, peaking at mag approximately 6-6.5.
C/2006 P4 was teardrop-shaped in C3 images, peaking at mag about
5.5; in C2 images, it was very faint and diffuse with a very slight
elongation but no tail. C/2006 P5, C/2006 P6, and C/2006 P7 were
all was quite faint, tiny, and stellar in appearance, with C/2006
P7 reaching mag about 7.5.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 O3 July 17.113 7 31.2 +19 28 C3 TH 2006-P28
C/2006 O4 20.179 7 41.9 +18 25 C3 HS 2006-P28
C/2006 O5 21.488 7 47.8 +17 47 C3 HS 2006-P28
C/2006 O6 23.571 7 51.7 +17 20 C3 HS 2006-P28
C/2006 O7 25.679 7 55.2 +16 13 C3/2 HS 2006-P32
C/2006 O8 26.488 8 02.6 +17 07 C3 HS 2006-P32
C/2006 P2 Aug. 1.696 8 30.7 +16 35 C3 AK 2006-P32
C/2006 P3 2.138 8 27.9 +15 40 C3 AK 2006-P32
C/2006 P4 2.431 8 24.8 +15 13 C3/2 SY 2006-P33
C/2006 P5 3.179 8 36.5 +16 05 C3 HS 2006-P33
C/2006 P6 3.363 8 35.5 +15 58 C3 HS 2006-P33
C/2006 P7 4.196 8 39.5 +15 51 C3 AK 2006-P33
[IAUC 8740, 2006 August 10]
COMETS C/2006 R3, C/2006 R4, C/2006 S7-S9 (SOHO)
Several additional apparent comets have been found on SOHO
website images (cf. IAUC 8740), all being Kreutz sungrazers except
for C/2006 R3 (Meyer group), which was very small, stellar in
appearance, elongated, and of mag about 7.5. K. Battams notes that
C/2006 R4 was mostly stellar in appearance with a hint of tail,
reaching mag about 3.5. C/2006 S7 shows a hint of tail and was
mostly stellar in appearance (mag about 5) in C3 images, while in
C2 images it appeared very diffuse and quite faint. C/2006 S8 was
slightly elongated and reached mag about 4.5 in C3 images; in C2
images, it was somewhat diffuse with a hint of tail, and it faded
quite rapidly. C/2006 S9 appeared stellar with a hint of
elongation (mag about 6) in C3 images; in C2 images, it was diffuse
with a hint of tail and quite faint.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 R3 Sept. 2.675 10 42.6 + 9 38 C2 HS 2006-U63
C/2006 R4 11.746 10 53.9 + 3 18 C3 TH 2006-U63
C/2006 S7 18.138 11 20.8 + 0 52 C3/2 RM 2006-U63
C/2006 S8 18.488 11 22.4 - 0 03 C3/2 RM 2006-U63
C/2006 S9 18.488 11 27.3 + 0 54 C3/2 RM 2006-U63
[IAUC 8772, 2006 November 11]
COMETS C/2006 S10 AND C/2006 S11 (SOHO)
Two additional Kreutz sungrazing comets have been found on
SOHO website images (cf. IAUC 8772). K. Battams notes that C/2006
S10 was small and stellar in appearance (mag about 6) in C3
coronagraph images, while in C2 images it appeared very small,
faint, and diffuse. C/2006 S11 was small with a hint of tail and
peaked in brightness at mag about 5.5 in C3 images, but it was very
diffuse and elongated in C2 images.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 S10 Sept. 18.763 11 23.9 + 0 38 C3/2 RM 2006-U63
C/2006 S11 18.821 11 24.9 + 0 43 C3/2 RM 2006-U63
[IAUC 8774, 2006 November 15]
COMETS C/2006 S12, C/2006 S13, C/2006 T2-T9 (SOHO)
Additional apparent comets have been found on SOHO website
images (cf. IAUC 8774), all being Kreutz sungrazers except C/2006
T6 (Meyer group). K. Battams notes that C/2006 S12 was small,
stellar in appearance, and around mag 6 in C3 coronagraph images,
while it appeared slightly diffuse with no tail in C2 images.
C/2006 S13 was very small and around mag 7 in C3 frames, and it
appeared small, quite diffuse, and extremely faint in C2 exposures.
C/2006 T2 was small, stellar in appearance, and around mag 6 in C3
images, and quite diffuse and faint in C2 frames. C/2006 T3 was
tiny, stellar in appearance, and of mag about 7.5 in C3 exposures,
but it appeared very diffuse and faint in C2 images. C/2006 T4
(which was also found by T. Chen) was diffuse and extremely faint
(mag 7.5-8.0) in C3 images, and extremely diffuse and faint in C2
frames. C/2006 T5 was slightly diffuse, extremely small, and faint
(mag about 8). C/2006 T6 was tiny and stellar in appearance in all
exposures, being very faint (mag 7.5-8) in C3 frames and fading
rapidly in C2 images. C/2006 T7 and C/2006 T9 were extremely faint
(mag about 8.5) and diffuse with no tail. C/2006 T8 was tiny,
stellar in appearance, and of mag about 7.5 in C3 images, while C2
frames showed it to be faint and diffuse with a hint of tail.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 S12 Sep. 26.763 11 48.2 - 2 50 C3/2 RM 2006-W64
C/2006 S13 30.433 12 11.9 - 3 48 C3/2 HS 2006-W64
C/2006 T2 Oct. 2.113 12 11.4 - 4 52 C3/2 RM 2006-W64
C/2006 T3 3.263 12 21.6 - 4 59 C3/2 HS 2006-W64
C/2006 T4 3.279 12 21.5 - 5 01 C3/2 GS 2006-W64
C/2006 T5 6.314 12 40.7 - 5 43 C2 WX 2006-W65
C/2006 T6 9.904 12 49.9 - 5 28 C3/2 BZ 2006-W65
C/2006 T7 10.379 12 54.7 - 7 18 C2 BZ 2006-W65
C/2006 T8 15.429 13 08.2 - 9 54 C3/2 TH 2006-W65
C/2006 T9 15.881 13 15.6 - 9 35 C2 TH 2006-W65
[IAUC 8780, 2006 November 26]
COMETS C/2006 T10 AND C/2006 U8-U11 (SOHO)
Additional apparent comets have been found on SOHO website
images (cf. IAUC 8780), all being Kreutz sungrazers except C/2006
U10 (Meyer group). K. Battams notes that C/2006 T10 was small and
extremely faint (mag about 8.5). C/2006 U8 was tiny, stellar, and
faint (mag about 8.0) in C3 images, and extremely faint and diffuse
in C2 images. C/2006 U9 was small and stellar in appearance (mag
about 7) with big data gaps in C3 images, but slightly diffuse (mag
6.5-7) with a hint of a short tail in C2 images. C/2006 U10 was
stellar in appearance and very faint, fading out as it neared the
sun. C/2001 U11 appeared stellar and reached mag about 6.5 in C3
images, while it showed a stubby tail in C2 images.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 T10 Oct. 12.538 13 03.0 - 8 15 C2 BZ 2006-X25
C/2006 U8 16.532 13 14.8 -11 01 C3/2 TS 2006-X25
C/2006 U9 19.679 13 20.4 -11 47 C3/2 SF 2006-X25
C/2006 U10 20.104 13 34.6 - 8 45 C2 TH 2006-X26
C/2006 U11 24.138 13 36.1 -13 37 C3/2 HS 2006-X26
[IAUC 8783, 2006 December 12]
COMET C/2003 B3 (SOHO)
Another Kreutz sungrazing comet found on SOHO website images
(cf. IAUC 8783), being of stellar appearance (mag about 7.5-8):
Comet 2003 UT R.A.(2000)Decl. Inst. F MPEC
C/2003 B3 Jan. 22.696 20 32.4 -21 22 C3 HS 2006-X25
[IAUC 8786, 2006 December 20]
COMETS C/2006 U12 AND C/2006 U13 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8786). K. Battams notes that C/2006 U12
was diffuse, small, and faint (reaching mag 7.5). C/2006 U13 was
tiny, very faint, and slightly diffuse with no tail.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 U12 Oct. 24.413 13 49.0 -12 51 C2 TC 2006-X26
C/2006 U13 25.381 13 52.9 -13 14 C2 HS 2006-X26
[IAUC 8787, 2006 December 28]
COMET C/2003 G5 (SOHO)
Another Kreutz sungrazing comet (cf. IAUC 8786) found on
archival SOHO website images, being very faint and diffuse with no
tail:
Comet 2003 UT R.A.(2000)Decl. Inst. F MPEC
C/2003 G5 Apr. 6.518 1 07.8 + 5 46 C2 HS 2006-X25
[IAUC 8788, 2006 December 30]
COMETS C/2006 U14, C/2006 U15, C/2006 U16 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8788). K. Battams notes that C/2006 U14
was stellar in appearance and of mag about 7 in C3 images, while it
appeared "condensed" and small in C2 images. C/2006 U15 was very
small, faint, and a little diffuse. C/2006 U16 (which was
independently reported by T. Chen, H. Su, and R. Kracht) was
stellar in appearance and very faint (mag about 8).
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 U14 Oct. 28.096 13 57.5 -14 42 C3/2 HS 2007-B37
C/2006 U15 28.329 14 04.5 -14 15 C2 LC 2007-B37
C/2006 U16 30.604 14 13.9 -15 05 C2 TC 2007-B37
[IAUC 8805, 2007 February 10]
COMET C/2003 C6 (SOHO)
An additional Kreutz sungrazing comet has been found on
archival SOHO website images (cf. IAUC 8805). K. Battams notes
that C/2003 C6 was stellar in appearance and faint (mag about 8).
Comet 2003 UT R.A.(2000)Decl. Inst. F MPEC
C/2003 C6 Feb. 8.179 21 41.0 -16 21 C3 RK 2007-B75
[IAUC 8807, 2007 February 16]
COMETS C/2006 V2-V10 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8807). C/2006 V2 was very bright, peaking
at mag 1.3 on Nov. 3.154 UT at 11.0 solar radii in C3 images, with
a thin tail that was 1.25 deg long at 8.0 solar radii on Nov. 3.429;
in C2 images, the long, thin tail survived for some hours after the
comet's head had disappeared behind the occulter. C/2006 V3 and V4
were stellar in appearance and faint (mag 7.5). C/2006 V5, V6, V7,
V8, and V10 were somewhat diffuse and faint (mag about 8, 7.5, 7,
7.5, and 8, respectively). C/2006 V9 was stellar in appearance and
of mag about 5 in C3 images; in C2 images, it had a condensed head
and an extremely faint, thin tail that extended to about 17' on Nov.
14.171 at 5 solar radii.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 V2 Nov. 2.013 14 00.6 -18 18 C3/2 JS 2007-B38
C/2006 V3 3.021 14 27.2 -16 13 C2 HS 2007-B38
C/2006 V4 4.013 14 25.3 -17 28 C3 HS 2007-B38
C/2006 V5 7.379 14 46.0 -17 44 C2 HS 2007-B38
C/2006 V6 7.521 14 46.1 -17 43 C2 TH 2007-B38
C/2006 V7 8.579 14 50.6 -18 02 C2 HS 2007-B38
C/2006 V8 11.851 15 04.7 -19 07 C2 RK 2007-B75
C/2006 V9 13.321 14 59.3 -21 16 C3/2 BZ 2007-B75
C/2006 V10 13.993 15 13.4 -19 40 C2 HS 2007-B75
[IAUC 8811, 2007 February 21]
COMETS C/2006 W5, C/2006 W6, C/2006 W7, C/2006 X2 (SOHO)
Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8811). K. Battams notes that C/2006 W5
appeared as a fuzzy streak about 2' long and quite faint (mag about
7.5). C/2006 W6 was very small, quite diffuse, and very faint (mag
8). C/2006 W7 was also very small and faint (mag about 7.5), and
slightly diffuse. C/2006 X2 was very diffuse, faint, and somewhat
elongated.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 W5 Nov. 20.004 15 40.3 -21 16 C2 TH 2007-B76
C/2006 W6 20.038 15 40.2 -21 21 C2 TH 2007-B76
C/2006 W7 25.479 16 03.1 -22 28 C2 RK 2007-B76
C/2006 X2 Dec. 9.049 17 04.6 -24 41 C2 RK 2007-B76
[IAUC 8813, 2007 February 26]
COMETS C/2006 X3-X10 (SOHO)
Additional comets have been found on SOHO website images (cf.
IAUC 8813) -- all Kreutz sungrazers except for C/2006 X10 (Meyer
group). K. Battams notes that C/2006 X3, C/2006 X5, C/2006 X6,
C/2006 X8, and C/2006 X9 were all extremely faint (mag about 8.5).
C/2006 X3, which was observed during a solar-particle storm that
hit the SOHO spacecraft, appeared diffuse. C/2006 X4 was stellar
in appearance and reached mag about 6 in C3 images, while C2 images
showed a hint of a very faint tail. C/2006 X5 was very diffuse and
elongated. C/2006 X6 was tiny and slightly diffuse. C/2006 X7 was
stellar in appearance in C3 images, of mag about 6.5, while C2
images showed it as slightly diffuse with a hint of a faint tail.
C/2006 X8 was stellar in appearance. C/2006 X9, which was also
found by R. Kracht, was a very diffuse blob. C/2006 X10 was
stellar in appearance, reaching mag about 7.5.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 X3 Dec. 9.567 17 06.8 -24 43 C2 BZ 2007-C40
C/2006 X4 10.513 17 08.9 -26 51 C3/2 TS 2007-C40
C/2006 X5 10.550 17 11.4 -24 49 C2 MM 2007-C40
C/2006 X6 11.675 17 16.4 -24 53 C2 XG 2007-C40
C/2006 X7 11.988 17 17.0 -26 10 C3/2 HS 2007-C41
C/2006 X8 12.567 17 20.9 -24 55 C2 BZ 2007-C41
C/2006 X9 15.204 17 34.6 -25 01 C2 TH 2007-C41
C/2006 X10 15.479 17 30.3 -22 17 C2 RK 2007-C41
[IAUC 8815, 2007 February 28]
COMETS C/2006 X11 AND C/2006 Y3-Y9 (SOHO)
Eight additional Kreutz sungrazing comets have been found on
SOHO website images (cf. IAUC 8815). All were stellar in
appearance except C/2006 X11 (diffuse and small), C/2006 Y8
(slightly diffuse, tiny, mag about 8), and C/2006 Y9 ("mostly
stellar" in appearance). C/2006 X11, C/2006 Y3 (C3 images), C/2006
Y7, and C/2006 Y9 were very faint (mag about 8.5). C/2006 Y3 was
of mag about 8 in C2 images. C/2006 Y4 was of mag about 7.5-8.
C/2006 Y5 reached mag 5.3 on Dec. 21.529 UT (at 10 solar radii) but
showed no apparent tail. C/2006 Y6 reached mag 5.0 on Dec. 21.846
(at 11 solar radii) in C3 images, while C2 images show a hint of an
extremely faint, thin tail.
Comet 2006 UT R.A.(2000)Decl. Inst. F MPEC
C/2006 X11 Dec. 15.371 17 33.8 -25 05 C2 RM 2007-D16
C/2006 Y3 17.863 17 47.8 -25 35 C3/2 SY 2007-D16
C/2006 Y4 20.038 17 55.6 -25 16 C2 RK 2007-D16
C/2006 Y5 20.929 18 00.8 -27 40 C3/2 TH 2007-D16
C/2006 Y6 21.238 18 02.3 -27 58 C3/2 BZ 2007-D17
C/2006 Y7 21.854 18 03.6 -25 20 C2 TH 2007-D17
C/2006 Y8 21.884 18 03.8 -25 10 C2 RK 2007-D17
C/2006 Y9 21.914 18 04.1 -25 15 C2 MA 2007-D17
[IAUC 8819, 2007 March 16]