B. T. Bolinは、8月20日、23日、24日と25日UT、PalomarのZwicky Transient Facility
(ZTF)の1.2-m f/2.4 Oschin Schmidt望遠鏡で得た画像からP/2011 A2 (IAUC 9192、9204
を参照)を検出した。
NK 2493 & 3673とICQ's 2015 & 2021 Comet Handbookの中野主一氏の予報に対し、
Delta(T)は、+0.79 dayであった。
MPC 82317のWilliamsの予報に対して、Delta(T)は、+0.61 dayであった。
彗星年表2020の佐藤裕久の参考軌道要素の修正値は、Delta(T) = +0.72 dayであった。
検出位置は次のとおり、
2021 UT R.A. (2000) Decl. Mag. Observer
Aug. 20.50218 7 31 15.27 +23 44 54.4 18.5 Bolin
20.50454 7 31 15.69 +23 44 53.7 18.6 "
20.50671 7 31 16.22 +23 44 53.4 19.5 "
20.50690 7 31 16.07 +23 44 53.2 18.5 "
20.50908 7 31 16.66 +23 44 52.9 19.7 "
20.50927 7 31 16.48 +23 44 52.6 18.6 "
20.51163 7 31 16.85 +23 44 52.3 18.7 "
23.50442 7 39 39.13 +23 30 15.5 18.5 "
23.50681 7 39 39.53 +23 30 14.4 18.2 "
23.50922 7 39 39.93 +23 30 14.1 18.3 "
23.51162 7 39 40.30 +23 30 13.0 18.4 "
24.50368 7 42 27.29 +23 25 00.2 18.6 "
24.50609 7 42 27.75 +23 24 59.4 18.3 "
24.51089 7 42 28.46 +23 24 57.9 18.5 "
25.50317 7 45 15.97 +23 19 34.0 18.6 "
25.50579 7 45 16.38 +23 19 33.7 18.6 "
25.50798 7 45 16.77 +23 19 32.3 18.8 "
25.51037 7 45 17.18 +23 19 32.2 18.8 "
25.51278 7 45 17.49 +23 19 32.2 18.5 "
MPCの連結軌道要素と位置推算表は次のとおり、
Orbital elements:
P/2011 A2 (Scotti)
Epoch 2010 Dec. 30.0 TT = JDT 2455560.5
T 2010 Dec. 22.50369 TT Rudenko
q 1.5587914 (2000.0) P Q
n 0.17977534 Peri. 94.58891 -0.85751096 -0.51050868
a 3.1092046 Node 54.72663 +0.43566060 -0.78641436
e 0.4986527 Incl. 4.47403 +0.27363260 -0.34775472
P 5.48
From 251 observations 2011 Jan. 11-2021 Aug. 25, mean residual 0".7.
P/2011 A2 (Scotti)
Epoch 2016 June 21.0 TT = JDT 2457560.5
T 2016 June 14.33130 TT Rudenko
q 1.5528938 (2000.0) P Q
n 0.18010449 Peri. 94.64856 -0.85758427 -0.51038812
a 3.1054153 Node 54.67518 +0.43553783 -0.78644649
e 0.4999400 Incl. 4.47541 +0.27359828 -0.34785900
P 5.47
From 251 observations 2011 Jan. 11-2021 Aug. 25, mean residual 0".7.
P/2011 A2 (Scotti)
Epoch 2021 Dec. 12.0 TT = JDT 2459560.5
T 2021 Dec. 2.23466 TT Rudenko
q 1.5546552 (2000.0) P Q
n 0.17997041 Peri. 94.50364 -0.85627874 -0.51257654
a 3.1069575 Node 54.67379 +0.43754921 -0.78533121
e 0.4996214 Incl. 4.47483 +0.27447661 -0.34716016
P 5.48
From 251 observations 2011 Jan. 11-2021 Aug. 25, mean residual 0".7.
P/2011 A2 (Scotti)
Epoch 2027 June 4.0 TT = JDT 2461560.5
T 2027 May 22.35858 TT Rudenko
q 1.5492645 (2000.0) P Q
n 0.18030861 Peri. 94.49686 -0.85582176 -0.51334079
a 3.1030711 Node 54.62955 +0.43823684 -0.78491507
e 0.5007319 Incl. 4.47637 +0.27480463 -0.34697200
P 5.47
From 251 observations 2011 Jan. 11-2021 Aug. 25, mean residual 0".7.
P/2011 A2 (Scotti)
Epoch 2021 July 5.0 TT = JDT 2459400.5
T 2021 Dec. 2.25370 TT Rudenko
q 1.5545928 (2000.0) P Q
n 0.18002019 Peri. 94.51301 -0.85638333 -0.51240130
a 3.1063847 Node 54.67614 +0.43738748 -0.78542195
e 0.4995492 Incl. 4.47497 +0.27440808 -0.34721358
P 5.47
From 251 observations 2011 Jan. 11-2021 Aug. 25, mean residual 0".7.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1
2021 07 29 06 29 58.6 +24 42 56 2.7741 1.9498 29.0 14.6 21.6
...
2021 08 13 07 10 28.4 +24 14 16 2.6234 1.8740 34.2 17.7 21.3
...
2021 08 21 07 32 38.3 +23 42 37 2.5425 1.8354 36.8 19.3 21.2
...
2021 08 27 07 49 28.5 +23 11 05 2.4821 1.8075 38.7 20.5 21.0
2021 08 28 07 52 17.7 +23 05 11 2.4721 1.8029 39.0 20.6 21.0
2021 08 29 07 55 07.3 +22 59 05 2.4621 1.7983 39.3 20.8 21.0
...
2021 09 04 08 12 09.1 +22 18 31 2.4024 1.7717 41.1 22.0 20.9
...
2021 09 12 08 35 00.9 +21 13 54 2.3240 1.7378 43.5 23.5 20.7
...
2021 09 27 09 18 07.9 +18 41 19 2.1825 1.6802 47.7 26.2 20.4
(MPEC 2021-Q69、CBET 5026、oaa-comet 2142)
メイン
Comet P/2011 A2 = 2021 Q2 (Scotti)