SOHO Comets 2018

The table list the provisional number for the comet, the day (UT) and month of the first (discovery) observation, the year and comet identification, the LASCO or STEREO coronagraph on which it was discovered, the discoverer (additional names are independent discoverers), with the number of their discoveries given in brackets following the name, and finally the date of discovery.

SOHO Observed   Des C  G  Observers							Discovered
3485 02/01/2018     C3 K  Worachate Boonplod						January 2
3486 03/01/2018     C3 K  Zhijian Xu							January 3
3487 05/01/2018     C3 K  Worachate Boonplod						January 5
  91 06/01/2018     H1 K  Karl Battams							January 9
  92 09/01/2018     H1 K  Zhijian Xu							January 12
  93 13/01/2018     H1 K  Trygve Prestgard						January 15
  94 14/01/2018     H1 K  Zhijian Xu							January 16
  95 14/01/2018     H1 K  Trygve Prestgard						January 17
  96 16/01/2018     H1 K  Trygve Prestgard						January 18
   U 14/01/2018     H1 K  Trygve Prestgard						January 18
  97 17/01/2018     H1 K  Zhijian Xu							January 20
  98 19/01/2018     H1 K  Zhijian Xu							January 21
  99 21/01/2018     H1 K  Zhijian Xu							January 23
 100 23/01/2018     H1 K  Masanori Uchina						January 25
   U 23/01/2018     H1 K  Zhijian Xu							January 25
3488 26/01/2018     C3 K  Worachate Boonplod						January 26
   C 24/01/2018     H1 O  Alan Watson							January 27 = (925) Alphonsina
 101 26/01/2018     H1 K  Zhijian Xu							January 29
 102 30/01/2018     H1 K  Zhijian Xu							February 2
3489 05/02/2018     C3 K  Zhijian Xu							February 5
3490 05/02/2018     C3 K  Worachate Boonplod						February 5
3491 05/02/2018     C2 D  Worachate Boonplod						February 5
 103 03/01/2018     H1 K  Zhijian Xu							February 6
3492 07/02/2018     C3 K  Zhijian Xu							February 7
3493 11/02/2018     C2 Y  Worachate Boonplod						February 11
 104 09/02/2018     H1 K  Masanori Uchina						February 11
3494 14/02/2018     C3 K  Worachate Boonplod						February 14
3495 15/02/2018     C3 K  Worachate Boonplod						February 15
3496 17/02/2018     C3 K  Worachate Boonplod						February 17
3497 19/02/2018     C3 K  Worachate Boonplod						February 19
3498 22/02/2018     C3 K  Zhijian Xu							February 22
3499 24/02/2018     C2 Y  Worachate Boonplod						February 24
3500 25/02/2018     C3 K  Szymon Liwo							February 25
3501 02/03/2018     C3 K  Salil Mulye, Worachate Boonplod 				March 2
3502 04/03/2018     C2 Y  Worachate Boonplod						March 4
3503 09/03/2018     C3 K  Worachate Boonplod						March 9
3504 12/03/2018     C2 Y  Szymon Liwo							March 12
3505 13/03/2018     C3 K  Worachate Boonplod						March 13
3506 14/03/2018     C3 K  Worachate Boonplod						March 14
3507 14/03/2018     C3 K  Worachate Boonplod						March 14
3508 17/03/2018     C3 Y  Worachate Boonplod						March 17
3509 20/03/2018     C3 K  Zhijian Xu							March 20
3510 30/03/2018     C3 K  Worachate Boonplod						March 30
3511 31/03/2018     C2 K  Worachate Boonplod						March 31
3512 03/04/2018     C2 K  Masanori Uchina						April 3
3513 09/04/2018     C3 K  Worachate Boonplod						April 9
3514 15/04/2018     C3 K  Worachate Boonplod						April 15
3515 18/04/2018     C2 K  Worachate Boonplod						April 18
3516 21/04/2018     C2 K  Worachate Boonplod						April 21
3517 22/04/2018     C3 K  Worachate Boonplod						April 22
3518 22/04/2018     C2 K  Worachate Boonplod						April 22
3519 23/04/2018     C2 K  Worachate Boonplod						April 23
3520 23/04/2018     C3 K  Worachate Boonplod						April 23
3521 27/04/2018     C2 K  Worachate Boonplod						April 27
3522 30/04/2018     C2 K  Worachate Boonplod						April 30
3523 02/05/2018     C2 K  Worachate Boonplod						May 2
3524 03/05/2018     C2 D  Rainer Kracht							May 3
3525 04/05/2018     C2 K  Worachate Boonplod						May 4
3526 06/05/2018     C2 K  Worachate Boonplod						May 6
3527 06/05/2018     C3 K  Worachate Boonplod						May 6
3528 07/05/2018     C2 K  Worachate Boonplod						May 7
3529 07/05/2018     C3 K  Worachate Boonplod						May 7
3530 08/05/2018     C2 K  Szymon Liwo							May 8
3531 10/05/2018     C3 K  Worachate Boonplod						May 10
3532 10/05/2018     C3 K  Worachate Boonplod						May 10
3533 11/05/2018     C2 K  Worachate Boonplod						May 11
3534 09/05/2018     C2 O  Rainer Kracht							May 11
3535 14/05/2018     C2 K  Rainer Kracht							May 16
3536 17/05/2018     C2 K  Worachate Boonplod						May 17
3537 19/05/2018     C3 K  Worachate Boonplod						May 19
3538 21/05/2018     C3 K  Worachate Boonplod						May 21
3539 21/05/2018     C2 O  Rainer Kracht							May 21
3540 23/05/2018     C2 K  Worachate Boonplod						May 24
3541 27/05/2018     C2 K  Masanori Uchina						May 27
3542 29/05/2018     C2 Y  Worachate Boonplod						May 29
3543 29/05/2018     C2 K  Worachate Boonplod						May 29
3544 29/05/2018     C2 K  Worachate Boonplod						May 29
3545 03/06/2018     C2 K  Worachate Boonplod						June 3
3546 07/06/2018     C3 K  Masanori Uchina						June 7
3547 08/06/2018     C2 K  Worachate Boonplod						June 8
3548 08/06/2018     C2 K  Masanori Uchina						June 8
3549 09/06/2018     C2 K  Masanori Uchina						June 9
3550 09/06/2018     C2 K  Masanori Uchina						June 9
3551 11/06/2018     C2 K  Worachate Boonplod						June 11
3552 12/06/2018     C2 K  Worachate Boonplod						June 12
3553 13/06/2018     C2 K  Worachate Boonplod						June 13
3554 14/06/2018     C2 K  Worachate Boonplod						June 14
3555 15/06/2018     C2 K  Masanori Uchina						June 15
3556 16/06/2018     C2 K  Masanori Uchina						June 16
3557 18/06/2018     C2 K  Masanori Uchina						June 18
3558 20/06/2018     C2 K  Masanori Uchina						June 20
3559 21/06/2018     C2 K  Masanori Uchina						June 21
3560 23/06/2018     C2 K  Masanori Uchina						June 23
3560 23/06/2018     C3 K  Worachate Boonplod						June 23
3561 24/06/2018     C2 D  Rainer Kracht							June 24
3562 24/06/2018     C3 K  Masanori Uchina						June 24
   U 25/06/2018     C3 K  Masanori Uchina						June 25
3563 26/06/2018     C3 K  Masanori Uchina						June 26
3564 27/06/2018     C3 K  Worachate Boonplod						June 27
3565 27/06/2018     C2 K  Masanori Uchina						June 27
3566 27/06/2018     C2 K  Masanori Uchina						June 27
3567 30/06/2018     C3 K  Worachate Boonplod						June 30
3568 01/07/2018     C2 K  Worachate Boonplod						July 1
3569 02/07/2018     C3 K  Worachate Boonplod						July 2
3570 05/07/2018     C3 K  Worachate Boonplod						July 5
3571 06/07/2018     C3 K  Worachate Boonplod						July 6
3572 07/07/2018     C2 K  Masanori Uchina						July 7
3573 09/07/2018     C3 K  Worachate Boonplod						July 9
3574 13/07/2018     C3 K  Masanori Uchina						July 13
3575 15/07/2018     C3 K  Masanori Uchina						July 15
3576 18/07/2018     C3 K  Worachate Boonplod						July 18
3577 22/07/2018     C2 Y  Rainer Kracht							July 22
3578 23/07/2018     C2 Y  Masanori Uchina						July 23
3579 24/07/2018     C3 K  Zhijian Xu							July 24
3580 30/07/2018     C3 K  Worachate Boonplod						July 30
3581 31/07/2018     C3 K  Worachate Boonplod						July 31
nnnn 01/08/2018     C3 K  Worachate Boonplod						August 1
   C 11/08/2018     C2 D  Rainer Kracht							August 11 == 2002 R4 == 2007 Y4
   C 11/08/2018     C2 D  Worachate Boonplod						August 11 == 2002 R4 == 2007 Y4
   C 12/04/2013     C2 D  Worachate Boonplod						August ?? == 2002 R4 == 2007 Y4 == 3139 ?
nnnn 12/08/2018     C2 Y  Masanori Uchina						August 12
nnnn 13/08/2018     C3 K  Worachate Boonplod						August 13
nnnn 19/08/2018     C3 K  Worachate Boonplod						August 19
nnnn 24/08/2018     C3 K  Masanori Uchina						August 24
nnnn 28/08/2018     C3 K  Zhijian Xu							August 28
nnnn 29/08/2018     C3 K  Worachate Boonplod						August 29
nnnn 29/08/2018     C3 K  Worachate Boonplod						August 29
nnnn 29/08/2018     C3 K  Worachate Boonplod						August 29
nnnn 01/09/2018     C3 K  Worachate Boonplod						September 1
nnnn 02/09/2018     C3 K  Worachate Boonplod						September 2
nnnn 03/09/2018     C3 K  Worachate Boonplod						September 3
nnnn 05/09/2018     C3 K  Zhijian Xu							September 5
nnnn 08/09/2018     C3 K  Masanori Uchina						September 8
nnnn 12/09/2018     C3 K  Zhijian Xu							September 12
nnnn 15/09/2018     C3 K  Worachate Boonplod						September 15
nnnn 16/09/2018     C3 K  Worachate Boonplod						September 16
nnnn 19/09/2018     C3 K  Zhijian Xu							September 19
The column headed Des is the half month or other designation of the comet. The column headed C gives the SOHO instrument (C2 or C3 for the LASCO coronagraphs, SW for SWAN, T1 or T2 for STEREO) that the comet was discovered in. The column headed G indicates if it is a provisional member of the Kreutz group (K), Meyer group (Y), Marsden group (D), Kracht (R) or other comet (O). P in the SOHO number column indicates the discovery is pending, C indicates that it is confirmed, but not yet numbered, U indicates that is was not confirmed, X that it was confirmed, but there were insufficient observations.

Note that my observer count also includes X/ comets which are not counted as confirmed comets by the SOHO team. Where two or more people report discoveries nearly simultaneously, up to the first three observers are credited here. Where discoverers are clearly not following the SOHO or BAA Comet Section guidelines, they are not credited here at all. If initial reports don't include sufficient positions others may also be credited.

Official milestones:
3500    Szymon Liwo
S100    Masanori Uchina

It is possible that there are further comets to be found in the archival data, most likely non-group comets, but there may still be some Kreutz comets.


Published by Jonathan Shanklin. Jon Shanklin - jds@ast.cam.ac.uk