MPEC 2012-X14 : COMET C/2012 V4
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M.P.E.C. 2012-X14 Issued 2012 Dec. 5, 03:28 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET C/2012 V4
Observations:
CK12V040 KC2012 12 02.02261 19 14 02.00 -27 14 39.4 12.1 TuEX014I47
CK12V040 KC2012 12 02.02493 19 14 01.89 -27 14 32.6 12.1 TuEX014I47
CK12V040 KC2012 12 02.02733 19 14 01.78 -27 14 26.2 12.1 TuEX014I47
CK12V040 KC2012 12 02.03004 19 14 01.60 -27 14 18.9 12.1 TuEX014I47
CK12V040 KC2012 12 02.03104 19 14 01.56 -27 14 16.0 12.1 TuEX014I47
CK12V040 KC2012 12 02.03236 19 14 01.49 -27 14 12.6 12.1 TuEX014I47
CK12V040 KC2012 12 02.03241 19 14 01.48 -27 14 12.5 12.1 TuEX014I47
CK12V040 |C2012 12 02.03303 19 14 01.52 -27 14 18.1 cEX014H06
CK12V040 |C2012 12 02.03393 19 14 01.51 -27 14 15.4 cEX014H06
CK12V040 KC2012 12 02.03468 19 14 01.40 -27 14 06.2 12.1 TuEX014I47
CK12V040 |C2012 12 02.03483 19 14 01.42 -27 14 13.4 cEX014H06
CK12V040 |C2012 12 02.03573 19 14 01.39 -27 14 10.4 cEX014H06
CK12V040 |C2012 12 02.03664 19 14 01.32 -27 14 08.5 cEX014H06
CK12V040 KC2012 12 02.03700 19 14 01.26 -27 14 00.4 12.1 TuEX014I47
CK12V040 |C2012 12 02.03754 19 14 01.29 -27 14 06.0 10.6 TcEX014H06
CK12V040 KC2012 12 02.03894 19 14 01.17 -27 13 54.5 12.1 TuEX014I47
CK12V040 C2012 12 03.00684 19 13 11.69 -26 30 47.3 rEX014I10
CK12V040 C2012 12 03.01298 19 13 11.39 -26 30 31.2 rEX014I10
CK12V040 C2012 12 03.01957 19 13 11.07 -26 30 13.4 rEX014I10
CK12V040 |C2012 12 03.03368 19 13 10.45 -26 29 42.5 cEX014H06
CK12V040 |C2012 12 03.03458 19 13 10.43 -26 29 39.8 cEX014H06
CK12V040 |C2012 12 03.03548 19 13 10.36 -26 29 37.7 cEX014H06
CK12V040 |C2012 12 03.03638 19 13 10.29 -26 29 35.5 cEX014H06
CK12V040 |C2012 12 03.03731 19 13 10.25 -26 29 32.8 cEX014H06
CK12V040 |C2012 12 03.03821 19 13 10.20 -26 29 30.5 10.5 TcEX014H06
CK12V040 C2012 12 03.42532 19 12 50.69 -26 12 25.4 14.3 NqEX014E07
CK12V040 C2012 12 03.42736 19 12 50.56 -26 12 20.0 14.4 NqEX014E07
CK12V040 C2012 12 03.42969 19 12 50.46 -26 12 13.6 14.1 NqEX014E07
CK12V040 QC2012 12 03.43067 19 12 50.46 -26 12 11.4 10.7 TqEX014E12
CK12V040 QC2012 12 03.43207 19 12 50.28 -26 12 07.9 10.7 TqEX014E12
CK12V040 KC2012 12 03.45081 19 12 49.44 -26 11 18.4 14.1 NqEX014E07
CK12V040 C2012 12 04.01553 19 12 21.31 -25 46 51.5 rEX014I10
CK12V040 C2012 12 04.02315 19 12 20.92 -25 46 31.9 rEX014I10
CK12V040 C2012 12 04.03160 19 12 20.49 -25 46 09.8 rEX014I10
CK12V040 |C2012 12 04.03469 19 12 20.37 -25 46 08.2 cEX014H06
CK12V040 |C2012 12 04.03561 19 12 20.31 -25 46 05.6 cEX014H06
CK12V040 |C2012 12 04.03655 19 12 20.24 -25 46 03.6 cEX014H06
CK12V040 |C2012 12 04.03745 19 12 20.18 -25 46 00.5 cEX014H06
CK12V040 |C2012 12 04.03835 19 12 20.17 -25 45 58.0 cEX014H06
CK12V040 |C2012 12 04.03925 19 12 20.11 -25 45 56.1 10.5 TcEX014H06
CK12V040 KC2012 12 04.42685 19 12 00.92 -25 29 12.9 15.2 NqEX014E07
CK12V040 KC2012 12 04.43161 19 12 00.68 -25 29 01.1 14.6 NqEX014E07
CK12V040 KC2012 12 04.43528 19 12 00.51 -25 28 51.8 14.6 NqEX014E07
CK12V040 C2012 12 04.79709 19 11 42.65 -25 13 35.3 11.9 NwEX014J24
CK12V040 C2012 12 04.80095 19 11 42.54 -25 13 26.6 11.9 NwEX014J24
Observer details:
E07 Murrumbateman. Observer D. Herald. 0.40-m f/10 Schmidt-Cassegrain + CCD.
E12 Siding Spring Survey. Observer R. H. McNaught. 0.5-m Uppsala Schmidt
+ CCD.
H06 iTelescope Observatory, Mayhill. Observer H. Sato. 0.51-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
I10 Campo Catino Austral Obs., San Pedro de Atacama. [Observation submission
malformed: no details found after COD line]
I47 Pierre Auger Observatory, Malargue. Observers M. Masek, J. Cerny, J. Ebr,
M. Prouza, P. Kubanek, M. Jelinek. Measurer M. Masek. 0.3-m f/10
reflector + CCD.
J24 Observatorio Altamira. Observer J. F. Hernandez. 0.4-m f/10
Schmidt-Cassegrain + CCD.
Orbital elements:
C/2012 V4
Epoch 2012 Dec. 19.0 TT = JDT 2456280.5
T 2012 Dec. 19.66989 TT MPC
q 0.8103876 (2000.0) P Q
n 0.00524012 Peri. 20.17837 +0.56428199 -0.69891373
a 32.8278245 Node 320.41987 -0.81995865 -0.53647100
e 0.9753140 Incl. 136.39480 -0.09619594 +0.47298887
P 188
From 113 observations 1827 July 1-2012 Dec. 4.
C/2012 V4
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5
T 2012 Dec. 19.67008 TT MPC
q 0.8103960 (2000.0) P Q
n 0.00524424 Peri. 20.17758 +0.56428533 -0.69890899
a 32.8106221 Node 320.41943 -0.81995531 -0.53647778
e 0.9753008 Incl. 136.39490 -0.09620475 +0.47298818
P 188
From 113 observations 1827 July 1-2012 Dec. 4.
The above orbital elements, like those on MPEC X02, assume that
C/2012 V4 is a return of D/1827 M1 (Pons-Gambart). Whereas that earlier
orbit assumed that there were two missed returns between 1827 and 2012,
the above orbit assumes no missed returns. The much longer period
was suggested by the current observations not being well fit to
orbital periods of ~62 and ~94 years. Noting the obvious discordance
between the two E27 observations on Nov. 29, the semimajor axis fit by
the 2012 observations alone is at least 26 AU, discounting the two-
and three-missed revolution solutions. At the present time, the solution
presented here is believed to be correct, as the fit of the bulk of the
1827 observations (known to be grossly inaccurate by modern standards) is
far better than earlier attempts with shorter orbital periods. There is
a slight systematic trend in the current residuals, which may be related to
observation weighting. Continued observation is clearly desirable.
Presented below is an 1827-epoch orbit and residual block.
C/2012 V4
Epoch 1827 June 13.0 TT = JDT 2388520.5
T 1827 June 8.04234 TT MPC
q 0.8081891 (2000.0) P Q
n 0.00523011 Peri. 20.04000 +0.56413572 -0.69834011
a 32.8696975 Node 320.28962 -0.81985527 -0.53703795
e 0.9754123 Incl. 136.40828 -0.09791949 +0.47319270
P 188
From 113 observations 1827 July 1-2012 Dec. 4.
Residuals in seconds of arc (or two decimals in units of degrees)
I276L 030(0.09+ 0.03-) K12BU E12 0.8+ 1.6- K12C2 H06 0.1- 0.4+
I276M 030(0.03+ 0.07-) K12BU E12 0.4+ 0.8- K12C2 I47 0.5- 0.1-
I276N 030(0.04+ 0.07-) K12BU E12 0.3+ 0.8- K12C2 I47 0.0 0.1+
I276T 030(98.5- 93.3+) K12BU E12 0.7+ 1.1- K12C2 H06 0.7- 0.1-
I2771 030 38.9- 98.5+ K12BU I39 0.4+ 1.3- K12C2 H06 0.5- 0.5+
I2772 030 5.2+ 93.2+ K12BU I39 0.0 0.7- K12C2 I47 0.4- 0.3-
I2773 030 79.5- 57.9+ K12C1 H47 0.1+ 0.8- K12C2 H06 0.7- 0.1-
I2774 030 60.0- 75.2+ K12C1 H47 0.2+ 0.1- K12C2 I47 0.3- 0.4-
I2775 030 35.5- 66.0+ K12C1 H47 0.5+ 0.8- K12C2 H06 0.5- 0.0
I2776 282 90.3- 82.1+ K12C1 H47 0.5+ 0.6- K12C2 I47 0.1- 0.2+
I2776 030 26.0- 72.6+ K12C1 I39 0.4+ 0.8- K12C3 I10 0.8- 1.0+
I2776 030 44.8- 25.8+ K12C1 I39 0.2+ 0.7- K12C3 I10 0.7- 0.8+
I277C 030 25.2- 20.3+ K12C1 D88 1.2+ 0.2- K12C3 I10 0.5- 1.1+
I277D 030 24.5- 22.8+ K12C1 D88 0.9+ 0.2+ K12C3 H06 0.8- 0.8+
I277D 030 24.2- 20.6+ K12C1 E27 2.6+ 1.2+ K12C3 H06 0.5- 1.1+
I277D 030 21.4- 20.1+ K12C1 E27 1.0+ 0.3- K12C3 H06 0.8- 0.8+
I277E 030 25.3- 17.4+ K12C1 I39 0.0 0.2- K12C3 H06 1.1- 0.7+
I277F 030 2.1+ 46.3+ K12C1 844 0.3- 0.1+ K12C3 H06 1.0- 0.9+
I277G 030 1.5+ 14.0+ K12C1 844 0.3- 0.3- K12C3 H06 1.0- 0.8+
I277G 030 10.7+ 24.1+ K12C1 I39 0.4- 0.1- K12C3 E07 0.5- 0.8+
I277H 030 5.5+ 2.5- K12C1 H47 0.4+ 0.7- K12C3 E07 0.9- 0.8+
I277H 030 18.4- 4.1+ K12C1 844 0.1- 0.2- K12C3 E07 0.7- 1.1+
I277I 030 28.0- 20.6+ K12C1 H47 0.2- 0.4- K12C3 E12 0.2+ 1.0+
I277I 030 28.5- 18.6+ K12C2 H47 0.4- 0.4- K12C3 E12 1.3- 0.8+
I277J 030 13.7+ 22.6- K12C2 H47 0.0 0.1- K12C3 E07 0.2- 0.7+
I277J 030 41.8- 34.4- K12C2 H47 0.3- 0.3+ K12C4 I10 0.7+ 1.4+
I277J 030(0.00+ 0.03+) K12C2 H47 0.6- 0.2+ K12C4 I10 0.5+ 1.2+
I277K 030 11.2- 9.6+ K12C2 I39 0.1- 0.1- K12C4 I10 0.4+ 1.3+
I277K 030 0.3+ 12.1+ K12C2 I47 0.4- 0.3- K12C4 H06 0.7- 1.2+
I277L 030 5.9- 6.0- K12C2 I47 0.7+ 0.6- K12C4 H06 0.9- 1.4+
I277L 030 6.5- 8.5- K12C2 I47 0.2- 0.2+ K12C4 H06 1.2- 1.0+
K12BT E27 (2.6+ 4.0-) K12C2 I47 0.3- 0.2+ K12C4 H06 1.4- 1.8+
K12BT E27 1.5+ 0.5- K12C2 I47 0.0 0.1+ K12C4 H06 0.9- 1.9+
K12BU E27 1.6+ 0.9- K12C2 I47 0.6- 0.0 K12C4 H06 1.1- 1.5+
K12BU E27 1.6+ 1.2- K12C2 I47 0.6- 0.2- K12C4 E07 0.8- 1.5+
K12BU E27 1.9+ 0.3- K12C2 I47 0.4- 0.2+ K12C4 E07 0.8- 1.1+
K12BU E27 1.3+ 1.0- K12C2 I47 0.7- 0.1- K12C4 E07 0.7- 1.0+
K12BU E27 1.7+ 0.6- K12C2 I47 0.4- 0.0 K12C4 J24 2.5- 2.6+
K12BU E27 1.8+ 1.2- K12C2 I47 0.5- 0.0 K12C4 J24 1.4- 1.5+
K12BU E12 0.8+ 1.3- K12C2 H06 0.6- 0.1+
Ephemeris:
C/2012 V4 Elements MPC xxxxx
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2012 11 05 20 06 29.8 -57 41 51 0.9573 1.1479 72.2 55.3 12.0
...
2012 11 20 19 26 42.6 -37 52 45 1.2150 0.9794 51.5 52.2 11.8
...
2012 11 28 19 17 40.6 -30 25 30 1.3657 0.9059 41.5 46.2 11.7
...
2012 12 04 19 12 22.5 -25 47 37 1.4724 0.8622 34.4 40.2 11.7
2012 12 05 19 11 33.3 -25 05 02 1.4893 0.8560 33.2 39.1 11.7
2012 12 06 19 10 44.9 -24 23 24 1.5058 0.8502 32.0 37.9 11.7
...
2012 12 12 19 06 06.0 -20 30 52 1.5968 0.8232 25.4 30.8 11.7
...
2012 12 20 19 00 12.2 -15 56 58 1.6923 0.8104 17.5 21.5 11.7
...
2013 01 04 18 49 43.8 -08 29 58 1.7766 0.8599 14.4 16.5 12.1
Gareth V. Williams (C) Copyright 2012 MPC M.P.E.C. 2012-X14
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