MPEC 2019-A20 : COMET P/2018 Y2 (Africano)
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M.P.E.C. 2019-A20 Issued 2019 Jan. 2, 18:01 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 Y2 (Africano)
B. M. Africano (G96) reported this object as a potential comet. He
described that the object showed a compact 8"-10" coma and a potential 5"-10"
tail in p.a. 275 in four co-added 40-s images. D. Bamberger (Z80) reported
the object appeared fuzzy (FWHM 6", compared to 3".8 for nearby stars) in 120
stacked 10-s images. R. Weryk (568) reported the object has a 1".20 FWHM
(compared to 0".76 +/- 0".03 for nearby stars) and an obvious 10" tail in p.a.
280.
Observations:
PK18Y020 C2018 12 10.41553 06 57 04.40 +28 17 16.0 19.4 GVEA020G96
PK18Y020 C2018 12 10.42069 06 57 04.24 +28 17 15.6 19.3 GVEA020G96
PK18Y020 C2018 12 10.42584 06 57 04.08 +28 17 15.5 19.5 GVEA020G96
PK18Y020 C2018 12 10.43099 06 57 03.92 +28 17 15.0 19.8 GVEA020G96
PK18Y020 C2018 12 17.77281 06 53 05.77 +28 09 06.9 19.9 RqEA020D29
PK18Y020 C2018 12 17.79048 06 53 05.14 +28 09 05.3 19.3 RqEA020D29
PK18Y020 C2018 12 17.80816 06 53 04.49 +28 09 03.8 20.0 RqEA020D29
PK18Y020* C2018 12 31.29428 06 44 42.68 +27 49 06.0 19.2 GVEA020G96
PK18Y020 C2018 12 31.29941 06 44 42.48 +27 49 05.3 19.1 GVEA020G96
PK18Y020 C2018 12 31.30453 06 44 42.27 +27 49 04.9 19.1 GVEA020G96
PK18Y020 C2018 12 31.30967 06 44 42.08 +27 49 04.4 19.2 GVEA020G96
PK18Y020 C2018 12 31.33052 06 44 41.25 +27 49 02.3 19.1 GVEA020G96
PK18Y020 C2018 12 31.34204 06 44 40.79 +27 49 01.1 19.1 GVEA020G96
PK18Y020 C2018 12 31.35090 06 44 40.42 +27 49 00.1 19.1 GVEA020G96
PK18Y020 C2018 12 31.35966 06 44 40.07 +27 48 58.9 19.1 GVEA020G96
PK18Y020 C2018 12 31.47780 06 44 35.40 +27 48 46.3 18.7 GVEA020G96
PK18Y020 C2018 12 31.48682 06 44 35.14 +27 48 45.3 18.7 GVEA020G96
PK18Y020 IC2018 12 31.88733006 44 19.79 +27 48 03.1 19.8 GVEA020L01
PK18Y020 IC2018 12 31.88970606 44 19.73 +27 48 02.4 19.8 GVEA020L01
PK18Y020 KC2018 12 31.92095606 44 18.50 +27 47 59.2 19.4 GVEA020L01
PK18Y020 KC2018 12 31.92354706 44 18.42 +27 47 58.9 19.6 GVEA020L01
PK18Y020 C2018 12 31.93685 06 44 17.88 +27 47 57.4 19.6 RoEA020K88
PK18Y020 C2018 12 31.94322 06 44 17.66 +27 47 56.7 19.7 RoEA020K88
PK18Y020 9C2019 01 01.20030 06 44 07.49 +27 47 29.8 19.2 GVEA020G40
PK18Y020 9C2019 01 01.23852 06 44 06.03 +27 47 25.0 19.3 GVEA020G40
PK18Y020 |C2019 01 01.37731 06 44 00.77 +27 47 10.8 VEA020H06
PK18Y020 |C2019 01 01.37906 06 44 00.71 +27 47 10.7 19.0 GVEA020H06
PK18Y020 KC2019 01 01.77689 06 43 45.60 +27 46 26.5 19.2 VqEA020C77
PK18Y020 KC2019 01 01.80214 06 43 44.65 +27 46 24.6 20.1 VqEA020C77
PK18Y020 KC2019 01 01.84231 06 43 43.09 +27 46 19.7 19.4 VqEA020C77
PK18Y020 KC2019 01 01.89558 06 43 40.99 +27 46 14.1 18.4 RtEA020B49
PK18Y020 KC2019 01 01.90405 06 43 40.66 +27 46 13.9 19.0 RtEA020B49
PK18Y020 KC2019 01 01.90543 06 43 40.61 +27 46 13.5 19.0 RtEA020B49
PK18Y020 KC2019 01 01.94819406 43 38.85 +27 46 07.7 18.0 GVEA020Z80
PK18Y020 KC2019 01 01.95282406 43 38.69 +27 46 07.5 18.0 GVEA020Z80
PK18Y020 KC2019 01 01.95745406 43 38.59 +27 46 06.2 18.1 GVEA020Z80
PK18Y020 KC2019 01 01.96208306 43 38.45 +27 46 06.0 18.1 GVEA020Z80
PK18Y020 KC2019 01 01.99604 06 43 37.02 +27 46 03.4 19.3 RrEA020106
PK18Y020 KC2019 01 02.00109 06 43 36.86 +27 46 02.3 19.8 RrEA020106
PK18Y020 KC2019 01 02.00613 06 43 36.63 +27 46 01.9 18.9 RrEA020106
PK18Y020 ^C2019 01 02.33954406 43 23.934+27 45 27.04 19.36GVEA020568
PK18Y020 ^C2019 01 02.34132806 43 23.862+27 45 26.84 19.33GVEA020568
PK18Y020 ^C2019 01 02.34256906 43 23.813+27 45 26.70 19.37GVEA020568
Observer details:
106 Crni Vrh. Observer S. Maticic. 0.6-m f/3.3 Deltagraph + CCD.
568 Mauna Kea. Observers R. Wainscoat, C. Crowder, T. Burdullis. Measurers
R. Weryk, R. Wainscoat. 3.6-m Canada-France-Hawaii Telescope + CCD.
B49 Paus Observatory, Sabadell. Observer J. Camarasa. 0.30-m f/4 Newtonian
reflector + CCD.
C77 Bernezzo Observatory. Observer A. Mantero. 0.25-m f/4.0 reflector + CCD.
D29 Purple Mountain Observatory, XuYi Station. Observers H. B. Zhao, B. Li,
G. Zhaori, R. Q. Hong, L. F. Hu. Measurers H. B. Zhao, B. Li, H. Lu,
G. Zhaori. 1.04-m f/1.8 Schmidt + CCD.
G40 Slooh.com Canary Islands Observatory. Observer B. Lutkenhoner. 0.43-m
f/6.8 Corrected Dall-Kirkham + CCD.
G96 Mt. Lemmon Survey. Observers D. C. Fuls, B. M. Africano. Measurers
B. M. Africano, E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs,
A. D. Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard,
R. L. Seaman, F. C. Shelly. 1.5-m reflector + 10K CCD.
H06 iTelescope Observatory, Mayhill. Observer H. Sato. 0.43-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
K88 GINOP-KHK, Piszkesteto. Observer K. Sarneczky. 1.02-m
Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, V. Perovic, P. Kukic,
M. Nikic, A. Radica. Measurer K. Korlevic. 1.0-m f/2.9 reflector + CCD.
Z80 Northolt Branch Observatory. Observer G. Wells. Measurer D. Bamberger.
0.25-m f/8.0 Ritchey-Chretien + CCD.
Orbital elements:
P/2018 Y2 (Africano)
Epoch 2018 Dec. 28.0 TT = JDT 2458480.5
T 2018 Dec. 20.13276 TT MPCW
q 3.8737559 (2000.0) P Q
n 0.04779072 Peri. 160.20995 -0.13920598 -0.97418333
a 7.5203894 Node 297.43991 +0.87944596 -0.03912025
e 0.4848996 Incl. 11.55229 +0.45518841 -0.22234310
P 20.62
From 43 observations 2018 Dec. 10-2019 Jan. 2, mean residual 0".4.
P/2018 Y2 (Africano)
Epoch 2039 July 31.0 TT = JDT 2466000.5
T 2039 July 15.29180 TT MPCW
q 3.8724654 (2000.0) P Q
n 0.04779547 Peri. 160.08114 -0.13606227 -0.97461089
a 7.5198916 Node 297.38464 +0.87965228 -0.03627978
e 0.4850371 Incl. 11.55239 +0.45573998 -0.22094656
P 20.62
From 43 observations 2018 Dec. 10-2019 Jan. 2, mean residual 0".4.
P/2018 Y2 (Africano)
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
T 2018 Dec. 20.04936 TT MPCW
q 3.8737038 (2000.0) P Q
n 0.04781661 Peri. 160.19814 -0.13899244 -0.97421094
a 7.5176747 Node 297.43911 +0.87945311 -0.03891911
e 0.4847205 Incl. 11.55325 +0.45523987 -0.22225739
P 20.61
From 43 observations 2018 Dec. 10-2019 Jan. 2, mean residual 0".4.
Ephemeris:
P/2018 Y2 (Africano)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2018 12 03 07 00 22.3 +28 24 02 3.0128 3.8752 146.8 8.0 19.8
...
2018 12 18 06 52 58.0 +28 08 50 2.9213 3.8738 163.2 4.2 19.7
...
2018 12 26 06 48 05.5 +27 57 47 2.8983 3.8739 171.6 2.1 19.7
...
2019 01 01 06 44 15.5 +27 47 52 2.8936 3.8744 175.3 1.2 19.7
2019 01 02 06 43 36.9 +27 46 04 2.8939 3.8745 175.1 1.2 19.7
2019 01 03 06 42 58.4 +27 44 14 2.8945 3.8747 174.7 1.3 19.7
...
2019 01 09 06 39 11.0 +27 32 22 2.9044 3.8756 169.6 2.6 19.7
...
2019 01 17 06 34 28.6 +27 14 30 2.9343 3.8775 161.0 4.7 19.7
...
2019 02 01 06 27 39.3 +26 36 16 3.0381 3.8825 144.5 8.5 19.8
Gareth V. Williams (C) Copyright 2019 MPC M.P.E.C. 2019-A20
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