Comet P/2006 G1 = 2016 B2 (McNaught) 小惑星センターのG. V. Williamsは1.8-m Pan-STARRS1望遠鏡で得られた1月18日と2月14日の 観測からP/2006 G1(IAUCs 8699, 8703を参照)の検出を確認した。 検出位置は次のとおり。 2016 UT R.A. (2000) Decl. Mag. Jan. 18.57014 11 35 18.77 -14 34 19.6 21.8 18.58267 11 35 18.70 -14 34 24.3 22.2 18.59516 11 35 18.65 -14 34 29.4 22.3 Feb. 14.48664 11 27 39.62 -16 47 06.7 21.4 14.49919 11 27 39.20 -16 47 08.7 21.6 14.51172 11 27 38.80 -16 47 11.1 21.3 14.52449 11 27 38.40 -16 47 13.6 21.5 MPC 89014のG. V. Williamsの予報に対し、Delta(T)は、-0.06 dayであった。 ICQ's 2015 Comet Handbookの中野主一氏の予報に対し、Delta(T)は、-0.15 dayであった。 連結軌道要素、位置推算表は次のとおり、 Orbital elements: P/2006 G1 = 2016 B2 (McNaught) Epoch 2006 Aug. 13.0 TT = JDT 2453960.5 T 2006 Aug. 18.51568 TT MPCW q 2.6320236 (2000.0) P Q n 0.09320818 Peri. 313.94513 -0.25641666 +0.92582260 a 4.8176292 Node 299.25198 -0.77037595 -0.36925701 e 0.4536683 Incl. 18.55767 -0.58375628 +0.08063361 P 10.6 From 121 observations 2006 Apr. 5-2016 Feb. 14, mean residual 0".5. P/2006 G1 = 2016 B2 (McNaught) Epoch 2017 Feb. 16.0 TT = JDT 2457800.5 T 2017 Feb. 3.04495 TT MPCW q 2.7815736 (2000.0) P Q n 0.08755417 Peri. 308.48756 -0.36165094 +0.89240988 a 5.0228650 Node 298.25889 -0.73121903 -0.45105949 e 0.4462177 Incl. 17.83946 -0.57838337 +0.01224518 P 11.3 From 121 observations 2006 Apr. 5-2016 Feb. 14, mean residual 0".5. P/2006 G1 (McNaught) Epoch 2028 May 29.0 TT = JDT 2461920.5 T 2028 May 16.58662 TT MPCW q 2.7012875 (2000.0) P Q n 0.09036529 Peri. 311.49410 -0.31721870 +0.90881615 a 4.9181482 Node 298.07027 -0.75261750 -0.41509797 e 0.4507511 Incl. 17.88422 -0.57700883 +0.04179575 P 10.9 From 121 observations 2006 Apr. 5-2016 Feb. 14, mean residual 0".5. P/2006 G1 = 2016 B2 (McNaught) Epoch 2016 Jan. 13.0 TT = JDT 2457400.5 T 2017 Feb. 2.57828 TT MPCW q 2.7817486 (2000.0) P Q n 0.08722253 Peri. 308.31611 -0.36280260 +0.89196189 a 5.0355890 Node 298.35269 -0.73032909 -0.45197186 e 0.4475823 Incl. 17.85130 -0.57878640 +0.01119948 P 11.3 From 121 observations 2006 Apr. 5-2016 Feb. 14, mean residual 0".5. Ephemeris: P/2006 G1 (McNaught) Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 2016 01 16 11 35 22.7 -14 17 29 3.2106 3.7197 113.9 14.0 21.7 ... 2016 01 31 11 33 20.9 -15 46 33 2.9750 3.6633 127.9 12.3 21.5 ... 2016 02 08 11 30 38.5 -16 23 34 2.8647 3.6335 135.4 11.0 21.4 ... 2016 02 14 11 27 54.4 -16 45 32 2.7905 3.6112 140.9 9.9 21.3 2016 02 15 11 27 23.8 -16 48 40 2.7789 3.6075 141.8 9.7 21.3 2016 02 16 11 26 52.3 -16 51 39 2.7676 3.6038 142.8 9.5 21.3 ... 2016 02 22 11 23 26.3 -17 06 17 2.7045 3.5816 148.0 8.4 21.2 ... 2016 03 01 11 18 13.2 -17 16 40 2.6346 3.5522 154.1 7.0 21.1 ... 2016 03 16 11 07 23.6 -17 08 01 2.5504 3.4977 159.1 5.8 21.0 (CBET 4258、MPEC 2016-C201)