Comet P/2005 L4 = 2013 K3 (Christensen) 佐藤英貴氏(東京都大田区)の通報によると5月19日-30日UT、iTelescope天文台, 0.51-m f/6.8 アストログラフ, f/4.5 レデューサー付, Siding Spring, N.S.W.遠隔操作によって、19.3等- 19.7等のP/2005 L4を検出した。 この天体は3日間全て60秒のスタック画像では恒星状であった。 検出位置は次のとおり、 2013 UT R.A. (2000) Decl. Mag. Observer May 19.69887 16 14 19.66 -38 06 44.5 Sato 19.70052 16 14 19.53 -38 06 43.3 " 19.70216 16 14 19.42 -38 06 43.0 " 19.70380 16 14 19.36 -38 06 42.7 19.5 " 29.47164 16 05 55.54 -37 13 01.3 " 29.47343 16 05 55.44 -37 13 00.3 " 29.47514 16 05 55.34 -37 13 00.0 " 29.47696 16 05 55.24 -37 12 59.4 " 29.47872 16 05 55.13 -37 12 57.9 19.7 " 30.40933 16 05 06.89 -37 06 53.3 " 30.41104 16 05 06.81 -37 06 52.8 " 30.41275 16 05 06.70 -37 06 51.6 19.3 " MPC 75730の予報に対し、Delta(T)は、-0.18 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/2005 L4 = 2013 K3 (Christensen) Epoch 2005 Aug. 18.0 TT = JDT 2453600.5 T 2005 Aug. 24.63045 TT MPC q 2.3667394 (2000.0) P Q n 0.11809348 Peri. 24.72143 +0.60876481 +0.74066698 a 4.1145160 Node 284.07670 -0.76790127 +0.46007490 e 0.4247830 Incl. 17.04279 -0.19933149 +0.48963611 P 8.35 From 113 observations 2005 June 3-2013 May 30, mean residual 0".5. P/2005 L4 = 2013 K3 (Christensen) Epoch 2014 Jan. 23.0 TT = JDT 2456680.5 T 2014 Jan. 6.12608 TT MPC q 2.3760242 (2000.0) P Q n 0.11773378 Peri. 24.86380 +0.60895426 +0.74058295 a 4.1228922 Node 283.95281 -0.76789671 +0.46066203 e 0.4236996 Incl. 17.02178 -0.19876962 +0.48921099 P 8.37 From 113 observations 2005 June 3-2013 May 30, mean residual 0".5. P/2005 L4 = 2013 K3 (Christensen) Epoch 2022 May 21.0 TT = JDT 2459720.5 T 2022 May 12.63158 TT MPC q 2.3609900 (2000.0) P Q n 0.11825946 Peri. 24.85703 +0.60885801 +0.74052634 a 4.1106654 Node 283.95554 -0.76799657 +0.46044818 e 0.4256429 Incl. 17.04382 -0.19867861 +0.48949792 P 8.33 From 113 observations 2005 June 3-2013 May 30, mean residual 0".5. P/2005 L4 = 2013 K3 (Christensen) Epoch 2013 Apr. 18.0 TT = JDT 2456400.5 T 2014 Jan. 6.17936 TT MPC q 2.3758306 (2000.0) P Q n 0.11770975 Peri. 24.88333 +0.60922143 +0.74036823 a 4.1234534 Node 283.95378 -0.76772778 +0.46094042 e 0.4238250 Incl. 17.02104 -0.19860339 +0.48927375 P 8.37 From 113 observations 2005 June 3-2013 May 30, mean residual 0".5. Ephemeris: P/2005 L4 (Christensen) Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 2013 05 01 16 27 25.1 -38 55 50 2.0535 2.9382 145.3 11.3 20.2 ... 2013 05 16 16 17 21.4 -38 22 01 1.9199 2.8832 158.2 7.5 20.0 ... 2013 05 24 16 10 40.2 -37 45 26 1.8711 2.8545 162.9 6.0 19.9 ... 2013 05 30 16 05 27.9 -37 09 36 1.8455 2.8332 163.9 5.7 19.9 2013 05 31 16 04 36.0 -37 02 58 1.8421 2.8297 163.8 5.8 19.8 2013 06 01 16 03 44.4 -36 56 09 1.8390 2.8262 163.6 5.8 19.8 ... 2013 06 07 15 58 43.4 -36 11 46 1.8259 2.8053 161.1 6.7 19.8 ... 2013 06 15 15 52 43.9 -35 04 51 1.8230 2.7778 155.2 8.8 19.7 ... 2013 06 30 15 45 04.7 -32 47 23 1.8585 2.7278 141.4 13.4 19.7 Computer: Williams (CBET 3538、MPEC 2013-K47)