Comet P/2013 CU129 = 2018 A2 (PANSTARRS)

Erwin Schwab, Egelsbach (ドイツ)は、1月16.9日UT、スペイン Calar Altoにある0.8-m f/3 
Schmidt 望遠鏡で得た画像からP/2013 CU129を検出した。コマと尾はない。
G. V. Williamsは、D. C. Fulsによる、1月12.4日のMt Lemmonの観測と同定した。
ICQ's 2018 Comet Handbookの中野主一氏の予報に対して、Delta(T)は、+0.02 dayであった。

検出位置は次のとおり、

     2018 UT             R.A. (2000) Decl.       Mag.   Observer
     Jan. 12.38036   10 49 12.78   +28 21 48.7   20.6   Fuls
          12.38549   10 49 12.71   +28 21 52.0   20.9     "
          12.39062   10 49 12.69   +28 21 55.4   20.8     "
          12.39575   10 49 12.66   +28 21 59.1   20.8     "
          16.91575   10 48 32.27   +29 12 27.0   20.0   Schwab
          16.92524   10 48 32.11   +29 12 33.9   20.3     "
          16.93379   10 48 31.98   +29 12 39.9   20.5     "

連結軌道要素と位置推算表は次のとおり、

Orbital elements:
    P/2013 CU129 (PANSTARRS)
Epoch 2013 Aug. 16.0 TT = JDT 2456520.5
T 2013 Aug. 6.93214 TT                                  MPCW
q   0.8001471            (2000.0)            P               Q
n   0.20172262     Peri.  211.97222     -0.21336160     +0.96509134
a   2.8793844      Node    46.20983     -0.84618414     -0.10483534
e   0.7221118      Incl.   12.14766     -0.48831264     -0.24001720
P   4.89
From 159 observations 2013 Feb. 1-2018 Jan. 16, mean residual 0".5.

    P/2013 CU129 (PANSTARRS)
Epoch 2018 June 11.0 TT = JDT 2458280.5
T 2018 June 24.36592 TT                                 MPCW
q   0.7978532            (2000.0)            P               Q
n   0.20191333     Peri.  211.92761     -0.21380910     +0.96496990
a   2.8775711      Node    46.22841     -0.84612873     -0.10514740
e   0.7227338      Incl.   12.15537     -0.48821292     -0.24036870
P   4.88
From 159 observations 2013 Feb. 1-2018 Jan. 16, mean residual 0".5.

    P/2013 CU129 (PANSTARRS)
Epoch 2023 May 16.0 TT = JDT 2460080.5
T 2023 May 14.01936 TT                                  MPCW
q   0.8012873            (2000.0)            P               Q
n   0.20172094     Peri.  212.01996     -0.21358687     +0.96508553
a   2.8794004      Node    46.14823     -0.84610947     -0.10515975
e   0.7217173      Incl.   12.13764     -0.48834354     -0.23989861
P   4.89
From 159 observations 2013 Feb. 1-2018 Jan. 16, mean residual 0".5.

    P/2013 CU129 (PANSTARRS)
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5
T 2018 June 24.38343 TT                                 MPCW
q   0.7979416            (2000.0)            P               Q
n   0.20199147     Peri.  211.93031     -0.21376596     +0.96497946
a   2.8768289      Node    46.22827     -0.84613307     -0.10510940
e   0.7226315      Incl.   12.15540     -0.48822428     -0.24034697
P   4.88
From 159 observations 2013 Feb. 1-2018 Jan. 16, mean residual 0".5.

Ephemeris:
    P/2013 CU129 (PANSTARRS)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2017 12 18    10 40 59.1 +25 17 29   1.9115  2.4676   112.9    21.5        21.4
...
2018 01 02    10 48 00.1 +26 46 45   1.6204  2.3395   126.2    19.8        20.9
...
2018 01 10    10 49 15.2 +27 57 27   1.4773  2.2691   133.5    18.3        20.6
...
2018 01 16    10 48 44.1 +29 01 49   1.3769  2.2153   139.0    16.9        20.3
2018 01 17    10 48 30.7 +29 13 29   1.3608  2.2063   139.9    16.7        20.3
2018 01 18    10 48 14.8 +29 25 24   1.3449  2.1973   140.8    16.4        20.2
...
2018 01 24    10 45 44.3 +30 42 12   1.2538  2.1424   146.1    14.8        20.0
...
2018 02 01    10 39 43.1 +32 36 29   1.1445  2.0680   152.2    12.8        19.6
...
2018 02 16    10 19 10.8 +36 25 00   0.9812  1.9245   155.6    12.3        19.1

(CBET 4475、MPEC 2018-B14)