Comet P/2007 C1 = 2014 C4 (Christensen)

J. V. Scotti (Arizona大学)は、2月9日、3月23日UT、Kitt PeakにあるSpacewatch　1.8-m
反射望遠鏡で得たCCD画像から21.2-21.9等のP/2007 C1 (Christensen)を検出した。

検出位置は次のとおり、

     2014 UT             R.A. (2000) Decl.       Mag.   Observer
     Feb.  9.54249   13 52 21.66   - 2 58 29.9   21.4   Scotti
           9.54938   13 52 21.90   - 2 58 31.0   21.9     "
           9.55608   13 52 22.14   - 2 58 32.1   21.3     "
     Mar. 23.39294   13 51 16.20   - 3 13 26.7   21.2     "
          23.38617   13 51 16.44   - 3 13 27.0   21.5     "
          23.37942   13 51 16.70   - 3 13 27.7   21.2     "

MPC 69911のBrian G. Marsdenの予報に対し、Delta(T)は、-0.52 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/2007 C1 = 2014 C4 (Christensen)
Epoch 2007 Mar. 1.0 TT = JDT 2454160.5
T 2007 Mar. 5.24854 TT                                  MPC
q   2.0506456            (2000.0)            P               Q
n   0.15115764     Peri.   95.60720     -0.88063957     -0.45906449
a   3.4901920      Node    57.11781     +0.36035271     -0.80957408
e   0.4124548      Incl.    8.02171     +0.30760343     -0.36585463
P   6.52
From 133 observations 2007 Feb. 9-2014 Mar. 23, mean residual 0".5.

    P/2007 C1 = 2014 C4 (Christensen)
Epoch 2013 Nov. 4.0 TT = JDT 2456600.5
T 2013 Nov. 15.66390 TT                                 MPC
q   2.1945562            (2000.0)            P               Q
n   0.14503982     Peri.  100.57299     -0.88709643     -0.44847276
a   3.5876595      Node    52.86967     +0.35149120     -0.80971773
e   0.3883042      Incl.    7.87494     +0.29918868     -0.37845659
P   6.80
From 133 observations 2007 Feb. 9-2014 Mar. 23, mean residual 0".5.

    P/2007 C1 = 2014 C4 (Christensen)
Epoch 2020 Aug. 19.0 TT = JDT 2459080.5
T 2020 Sept. 6.37874 TT                                 MPC
q   2.2031685            (2000.0)            P               Q
n   0.14470865     Peri.  100.69161     -0.88769543     -0.44731779
a   3.5931310      Node    52.82583     +0.35047673     -0.81013728
e   0.3868388      Incl.    7.87006     +0.29860156     -0.37892531
P   6.81
From 133 observations 2007 Feb. 9-2014 Mar. 23, mean residual 0".5.

    P/2007 C1 = 2014 C4 (Christensen)
Epoch 2014 May 23.0 TT = JDT 2456800.5
T 2013 Nov. 15.70675 TT                                 MPC
q   2.1946644            (2000.0)            P               Q
n   0.14505224     Peri.  100.59034     -0.88722713     -0.44821459
a   3.5874547      Node    52.86900     +0.35125606     -0.80981939
e   0.3882391      Incl.    7.87487     +0.29907726     -0.37854490
P   6.79
From 133 observations 2007 Feb. 9-2014 Mar. 23, mean residual 0".5.

Ephemeris:
    P/2007 C1 = 2014 C4 (Christensen)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2014 02 22    13 57 23.2 -03 21 52   1.5985  2.3046   124.2    20.8  21.6
...
2014 03 09    13 57 20.2 -03 26 27   1.4970  2.3386   139.0    16.2  21.6
...
2014 03 17    13 54 37.3 -03 20 39   1.4583  2.3583   147.4    13.1  21.5
...
2014 03 23    13 51 30.2 -03 13 53   1.4377  2.3737   153.9    10.6  21.5
2014 03 24    13 50 54.3 -03 12 37   1.4351  2.3763   155.0    10.2  21.5
2014 03 25    13 50 17.0 -03 11 19   1.4326  2.3790   156.1     9.8  21.5
...
2014 03 31    13 46 10.1 -03 03 18   1.4230  2.3951   162.7     7.1  21.6
...
2014 04 08    13 39 56.3 -02 53 16   1.4242  2.4174   170.6     3.9  21.6
...
2014 04 23    13 27 51.1 -02 44 25   1.4707  2.4614   167.3     5.2  21.7

Computer: Williams

(CBET 3837、MPEC 2014-F26)