第三颗SOHO彗星发现，编号SOHO 1153

发现时间2006年5月26日，SOHO编号 SOHO 1153。

MPEC公报：http://www.cfa.harvard.edu/mpec/K06/K06M64.html  正式编号：C/2006 K18

IAUC 8737公报

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