Comet P/1999 R1 = 2003 R5 = 2007 R5 = 2011 R4 (SOHO) K. Battams (海軍研究所:NRL)は、2011年9月6-7日UTのSOHO/LASCO C3のイメージからT. Lovejoy、 K. CernisとB. Zhouが見つけたこの彗星(IAUC 7251, 8871, 8872, 8877; MPEC 2007-S16を参照)の 位置測定を報告した。 典型的な非Kreutz SOHO彗星で、小さく、恒星状で尾またはコマはなく、光度は約6.5等とピークに 達していた。 最初の検出位置は次のとおり、 2011 UT R.A. (2000) Decl. Sept. 6.559 10 57.0 + 6 36 G. V. Williamsによる連結軌道要素と位置推算表は次のとおり、 Orbital elements: P/1999 R1 = 2003 R5 = 2007 R5 = 2011 R4 (SOHO) Epoch 1999 Sept. 19.0 TT = JDT 2451440.5 T 1999 Sept. 5.53205 TT MPCW q 0.0563848 (2000.0) P Q n 0.24608624 Peri. 43.20624 +0.66486566 -0.74664327 a 2.5219966 Node 5.26034 +0.60386628 +0.52004794 e 0.9776428 Incl. 13.78861 +0.43965802 +0.41481800 P 4.01 From 230 observations 1999 Sept. 5-2011 Sept. 7. P/1999 R1 = 2003 R5 = 2007 R5 = 2011 R4 (SOHO) Epoch 2003 Aug. 29.0 TT = JDT 2452880.5 T 2003 Sept. 8.81339 TT MPCW q 0.0568981 (2000.0) P Q n 0.24582170 Peri. 43.48619 +0.66490388 -0.74664661 a 2.5238056 Node 4.96908 +0.60385086 +0.52115394 e 0.9774554 Incl. 13.71367 +0.43962140 +0.41342158 P 4.01 From 230 observations 1999 Sept. 5-2011 Sept. 7. P/1999 R1 = 2003 R5 = 2007 R5 = 2011 R4 (SOHO) Epoch 2007 Sept. 17.0 TT = JDT 2454360.5 T 2007 Sept. 11.31541 TT MPCW q 0.0537262 (2000.0) P Q n 0.24695366 Peri. 48.46996 +0.66457977 -0.74721718 a 2.5160875 Node 359.87692 +0.60304127 +0.53672260 e 0.9786469 Incl. 12.72798 +0.44121985 +0.39191242 P 3.99 From 230 observations 1999 Sept. 5-2011 Sept. 7. P/1999 R1 = 2003 R5 = 2007 R5 = 2011 R4 (SOHO) Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 T 2011 Sept. 7.11827 TT MPCW q 0.0531642 (2000.0) P Q n 0.24718947 Peri. 48.45168 +0.66438275 -0.74739243 a 2.5144870 Node 359.91115 +0.60318292 +0.53645994 e 0.9788568 Incl. 12.73464 +0.44132293 +0.39193787 P 3.99 From 230 observations 1999 Sept. 5-2011 Sept. 7. P/1999 R1 = 2003 R5 = 2007 R5 = 2011 R4 (SOHO) Epoch 2015 June 27.0 TT = JDT 2457200.5 T 2015 Sept. 4.04844 TT MPCW q 0.0536232 (2000.0) P Q n 0.24691772 Peri. 48.86260 +0.66438671 -0.74738644 a 2.5163316 Node 359.48962 +0.60320414 +0.53775378 e 0.9786899 Incl. 12.65004 +0.44128795 +0.39017224 P 3.99 From 230 observations 1999 Sept. 5-2011 Sept. 7. P/1999 R1 = 2003 R5 = 2007 R5 = 2011 R4 (SOHO) Epoch 2015 Sept. 15.0 TT = JDT 2457280.5 T 2015 Sept. 4.04819 TT MPCW q 0.0536249 (2000.0) P Q n 0.24688122 Peri. 48.86272 +0.66439419 -0.74737979 a 2.5165796 Node 359.48891 +0.60319808 +0.53776135 e 0.9786913 Incl. 12.64999 +0.44128499 +0.39017456 P 3.99 From 230 observations 1999 Sept. 5-2011 Sept. 7. Ephemeris: P/1999 R1 (SOHO) Elements MPC xxxxx Date TT R. A. (2000) Decl. Delta r Elong. Phase 2015 05 16 16 01 47.5 -41 07 24 1.2551 2.2200 156.7 10.4 2015 05 17 15 58 30.6 -41 08 31 1.2402 2.2080 157.3 10.2 2015 05 18 15 55 08.5 -41 09 01 1.2257 2.1960 157.9 10.0 2015 05 19 15 51 41.2 -41 08 53 1.2116 2.1839 158.3 9.8 2015 05 20 15 48 09.1 -41 08 04 1.1978 2.1718 158.7 9.8 2015 05 21 15 44 32.1 -41 06 33 1.1845 2.1596 158.9 9.7 2015 05 22 15 40 50.6 -41 04 16 1.1715 2.1473 159.0 9.7 2015 05 23 15 37 04.7 -41 01 13 1.1588 2.1350 159.0 9.8 2015 05 24 15 33 14.6 -40 57 21 1.1466 2.1226 158.8 9.9 2015 05 25 15 29 20.7 -40 52 38 1.1348 2.1101 158.6 10.1 2015 05 26 15 25 23.1 -40 47 04 1.1233 2.0976 158.1 10.4 2015 05 27 15 21 22.3 -40 40 37 1.1123 2.0850 157.6 10.7 2015 05 28 15 17 18.4 -40 33 14 1.1016 2.0724 157.0 11.0 2015 05 29 15 13 11.9 -40 24 56 1.0914 2.0597 156.2 11.4 2015 05 30 15 09 03.1 -40 15 41 1.0816 2.0469 155.3 11.9 2015 05 31 15 04 52.3 -40 05 28 1.0721 2.0341 154.4 12.4 2015 06 01 15 00 39.9 -39 54 17 1.0631 2.0211 153.3 13.0 2015 06 02 14 56 26.3 -39 42 08 1.0545 2.0082 152.2 13.6 2015 06 03 14 52 11.9 -39 29 00 1.0463 1.9951 151.0 14.2 2015 06 04 14 47 57.1 -39 14 53 1.0385 1.9820 149.8 14.9 2015 06 05 14 43 42.2 -38 59 49 1.0312 1.9688 148.5 15.6 (CBET 4098、MPEC 2015-K01)