MPEC 2018-B19 : COMET P/2018 A4 (PANSTARRS)
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M.P.E.C. 2018-B19 Issued 2018 Jan. 17, 19:12 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Division F 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 P/2018 A4 (PANSTARRS)
Observations:
PK18A040 C2018 01 12.28722 02 00 14.649+09 31 23.62 20.6 TUEB019F51
PK18A040 C2018 01 12.29787 02 00 15.096+09 31 26.92 20.7 TUEB019F51
PK18A040 C2018 01 12.30856 02 00 15.510+09 31 30.50 20.7 TUEB019F51
PK18A040 C2018 01 12.31921 02 00 15.946+09 31 34.12 20.6 TUEB019F51
PK18A040 |C2018 01 13.07888 02 00 47.82 +09 35 40.3 vEB019H06
PK18A040 |C2018 01 13.08268 02 00 47.98 +09 35 41.5 19.7 TvEB019H06
PK18A040 C2018 01 13.08610 02 00 48.15 +09 35 42.7 19.8 TUEB019I52
PK18A040 C2018 01 13.09150 02 00 48.34 +09 35 44.6 19.7 TUEB019I52
PK18A040 C2018 01 13.09227 02 00 48.41 +09 35 45.0 19.5 TUEB019I52
PK18A040 C2018 01 13.09582 02 00 48.56 +09 35 45.8 19.6 TUEB019I52
PK18A040 C2018 01 13.09658 02 00 48.57 +09 35 46.0 19.8 TUEB019I52
PK18A040 C2018 01 13.10017 02 00 48.70 +09 35 47.1 19.7 TUEB019I52
PK18A040 C2018 01 13.10093 02 00 48.73 +09 35 47.5 20.0 TUEB019I52
PK18A040 C2018 01 13.10529 02 00 48.90 +09 35 48.9 19.9 TUEB019I52
PK18A040 KC2018 01 13.13357 02 00 50.05 +09 35 58.3 oEB019711
PK18A040 KC2018 01 13.13670 02 00 50.16 +09 35 59.1 oEB019711
PK18A040 IC2018 01 13.13980 02 00 50.29 +09 36 00.5 oEB019711
PK18A040 KC2018 01 13.86329 02 01 21.28 +09 39 57.8 20.0 TUEB019K51
PK18A040 KC2018 01 13.87635 02 01 21.84 +09 40 02.3 20.1 TUEB019K51
PK18A040 9C2018 01 13.88678 02 01 22.33 +09 40 06.3 19.8 TUEB019G40
PK18A040 9C2018 01 13.89802 02 01 22.83 +09 40 10.9 19.8 TUEB019G40
PK18A040 9C2018 01 13.90942 02 01 23.30 +09 40 14.7 19.8 TUEB019G40
PK18A040 KC2018 01 14.10177 02 01 31.67 +09 41 18.8 oEB019711
PK18A040 KC2018 01 14.10485 02 01 31.80 +09 41 19.8 oEB019711
PK18A040 KC2018 01 14.10790 02 01 31.92 +09 41 20.9 oEB019711
PK18A040 HC2018 01 14.15675 02 01 34.13 +09 41 36.2 oEB019691
PK18A040 HC2018 01 14.16427 02 01 34.37 +09 41 39.1 oEB019691
PK18A040 HC2018 01 14.17180 02 01 34.70 +09 41 41.4 oEB019691
PK18A040 KC2018 01 15.05865 02 02 14.10 +09 46 39.8 oEB019711
PK18A040 KC2018 01 15.06255 02 02 14.28 +09 46 41.4 oEB019711
PK18A040 KC2018 01 15.06559 02 02 14.38 +09 46 42.6 oEB019711
PK18A040 KC2018 01 15.21324 02 02 20.88 +09 47 32.8 20.0 ToEB019291
PK18A040 KC2018 01 15.21772 02 02 21.09 +09 47 34.2 20.1 ToEB019291
PK18A040 KC2018 01 15.22222 02 02 21.28 +09 47 36.2 19.8 ToEB019291
PK18A040 _C2018 01 15.28048402 02 23.970+09 47 55.85 21.0 TUEB019568
PK18A040 _C2018 01 15.28165902 02 24.022+09 47 56.26 20.9 TUEB019568
PK18A040 _C2018 01 15.28283202 02 24.074+09 47 56.65 20.9 TUEB019568
PK18A040 C2018 01 16.17091 02 03 04.73 +09 53 00.7 19.4 TUEB019I52
PK18A040 C2018 01 16.17579 02 03 04.87 +09 53 03.0 19.6 TUEB019I52
PK18A040 C2018 01 16.18000 02 03 05.09 +09 53 03.5 19.4 TUEB019I52
PK18A040 C2018 01 16.18417 02 03 05.28 +09 53 05.3 20.0 TUEB019I52
Observer details:
291 LPL/Spacewatch II. Observer M. T. Read. 1.8-m f/2.7 reflector + CCD.
568 Mauna Kea. Observers R. J. Wainscoat, L. Wells. Measurers M. Micheli,
R. J. Wainscoat. 3.6-m Canada-France-Hawaii Telescope + CCD.
691 Steward Observatory, Kitt Peak. Observer M. T. Read. 0.9-m f/3 reflector
+ CCD.
711 McDonald Observatory. Observer J. G. Ries. 2.1-m reflector + CCD + focal
reducer.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz,
M. Willman. Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
M. Huber, E. Lilly, E. Magnier, R. Wainscoat, C. Waters, R. Weryk. 1.8-m
Ritchey-Chretien + CCD.
G40 Slooh.com Canary Islands Observatory. Observer B. Lutkenhoner. 0.5-m
f/6.8 Corrected Dall-Kirkham + CCD.
H06 iTelescope Observatory, Mayhill. Observer H. Sato. 0.51-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
I52 Steward Observatory, Mt. Lemmon Station. Observers R. G. Matheny,
J. A. Johnson. Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs,
A. D. Grauer, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard,
R. G. Matheny, R. L. Seaman, F. C. Shelly. 1.0-m reflector + CCD.
K51 Osservatorio del Celado, Castello Tesino. Observers G. Favero, R. Furgoni.
Measurer R. Furgoni. 0.80-m f/4 reflector + CCD.
Orbital elements:
P/2018 A4 (PANSTARRS)
T 2018 May 21.38567 TT MPCW
q 2.3922941 (2000.0) P Q
n 0.04107605 Peri. 355.99674 -0.07418201 -0.99578874
a 8.3191113 Node 98.25160 +0.91645908 -0.08937093
e 0.7124339 Incl. 3.12027 +0.39319178 +0.02043580
P 23.99
From 41 observations 2018 Jan. 12-16.
Ephemeris:
P/2018 A4 (PANSTARRS)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2017 12 18 01 50 15.1 +07 53 15 2.1290 2.7827 122.4 17.4 20.1
...
2018 01 02 01 54 22.0 +08 41 56 2.2419 2.7168 108.3 20.1 20.1
...
2018 01 10 01 58 43.9 +09 19 23 2.3094 2.6835 101.4 21.1 20.1
...
2018 01 16 02 02 56.9 +09 52 03 2.3620 2.6594 96.5 21.6 20.1
2018 01 17 02 03 43.6 +09 57 51 2.3709 2.6555 95.7 21.6 20.1
2018 01 18 02 04 31.6 +10 03 44 2.3798 2.6516 94.9 21.7 20.1
...
2018 01 24 02 09 45.7 +10 40 55 2.4337 2.6286 90.2 22.0 20.1
...
2018 02 01 02 17 50.9 +11 34 52 2.5059 2.5993 84.3 22.2 20.1
...
2018 02 16 02 36 06.4 +13 25 47 2.6396 2.5488 73.9 21.9 20.2
Gareth V. Williams (C) Copyright 2018 MPC M.P.E.C. 2018-B19
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