[Iaude] MPEC Q35: COMET P/2018 P4 (PANSTARRS)
mpec at mpcdb1.cfa.harvard.edu
mpec at mpcdb1.cfa.harvard.edu
Sat Aug 18 16:35:16 EDT 2018
M.P.E.C. 2018-Q35 Issued 2018 Aug. 18, 20:23 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET P/2018 P4 (PANSTARRS)
On the basis of F51 images on Aug. 8, R. Weryk reported this object as a
possible comet, with a 1".2 FWHM, compared to the stellar value of 1".0.
R. Wainscoat (568, Aug. 10) reported a FWHM of 0".95 (vs stellar 0".7) and a
broad low-surface-brightness 15" tail in P.A. ~230. K. Sarneczky and
O. Hanyecz (K88, Aug. 18.0 UTC) repor a nearly stellar coma and a slighty-
curved ~15" tail to the SW.
Observations:
PK18P040 C2018 07 10.56729 23 57 12.145-06 06 59.99 21.6 wUEQ035F51
PK18P040 C2018 07 10.58904 23 57 12.310-06 06 54.52 21.5 wUEQ035F51
PK18P040 C2018 07 10.59984 23 57 12.403-06 06 51.73 21.5 wUEQ035F51
PK18P040* C2018 08 08.50138 23 54 34.812-04 30 01.67 20.6 wUEQ035F51
PK18P040 C2018 08 08.51317 23 54 34.553-04 29 59.88 20.6 wUEQ035F51
PK18P040 C2018 08 08.52499 23 54 34.305-04 29 58.12 20.6 wUEQ035F51
PK18P040 C2018 08 08.53682 23 54 34.046-04 29 56.41 20.6 wUEQ035F51
PK18P040 KC2018 08 10.00723423 54 03.37 -04 26 23.8 20.5 GVEQ035L01
PK18P040 KC2018 08 10.02468823 54 02.98 -04 26 21.3 20.3 GVEQ035L01
PK18P040 KC2018 08 10.03779223 54 02.69 -04 26 19.2 20.4 GVEQ035L01
PK18P040 _C2018 08 10.54585623 53 51.571-04 25 05.52 20.6 GVEQ035568
PK18P040 _C2018 08 10.54680123 53 51.543-04 25 05.38 20.4 GVEQ035568
PK18P040 _C2018 08 10.54774623 53 51.526-04 25 05.25 20.5 GVEQ035568
PK18P040 1C2018 08 12.63856 23 53 03.28 -04 20 13.3 VEQ035Q62
PK18P040 1C2018 08 12.64141 23 53 03.20 -04 20 13.2 VEQ035Q62
PK18P040 1C2018 08 12.64426 23 53 03.12 -04 20 12.9 20.3 VEQ035Q62
PK18P040 HC2018 08 14.36006 23 52 20.30 -04 16 29.7 19.3 RoEQ035691
PK18P040 HC2018 08 14.37492 23 52 19.96 -04 16 28.1 19.6 RoEQ035691
PK18P040 HC2018 08 14.39043 23 52 19.43 -04 16 27.1 19.0 RoEQ035691
PK18P040 KC2018 08 17.04078 23 51 08.11 -04 10 53.8 19.4 RoEQ035K88
PK18P040 KC2018 08 17.04783 23 51 07.89 -04 10 52.9 19.8 RoEQ035K88
PK18P040 KC2018 08 17.05488 23 51 07.69 -04 10 52.0 19.6 RoEQ035K88
PK18P040 KC2018 08 17.07927 23 51 07.00 -04 10 50.1 19.9 GVEQ035104
PK18P040 KC2018 08 17.09023 23 51 06.68 -04 10 48.8 18.8 GVEQ035104
PK18P040 C2018 08 17.44815 23 50 56.697-04 10 03.73 20.3 wUEQ035F51
PK18P040 C2018 08 17.45937 23 50 56.360-04 10 02.38 20.4 wUEQ035F51
PK18P040 C2018 08 17.47055 23 50 56.040-04 10 01.08 20.2 wUEQ035F51
PK18P040 C2018 08 17.50773 23 50 54.929-04 09 56.55 20.2 wUEQ035F51
PK18P040 KC2018 08 17.99720 23 50 40.87 -04 08 58.8 19.4 RoEQ035K88
PK18P040 KC2018 08 18.00567 23 50 40.62 -04 08 58.0 19.7 RoEQ035K88
PK18P040 KC2018 08 18.01413 23 50 40.37 -04 08 56.8 19.6 RoEQ035K88
PK18P040 KC2018 08 18.05245 23 50 39.25 -04 08 53.0 19.5 RrEQ035106
PK18P040 KC2018 08 18.06380 23 50 38.88 -04 08 51.9 19.2 RrEQ035106
Observer details:
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri, G. Succi.
Measurers P. Bacci, L. Tesi, G. Fagioli. 0.6-m f/4.0 reflector + CCD.
106 Crni Vrh. Observer B. Mikuz. 0.6-m f/3.3 Deltagraph + CCD.
568 Mauna Kea. Observers R. J. Wainscoat, D. Woodworth. Measurers
M. Micheli, R. J. Wainscoat. 3.6-m Canada-France-Hawaii Telescope + CCD.
691 Steward Observatory, Kitt Peak-Spacewatch. Observer R. A. Mastaler.
0.9-m f/3 reflector + CCD.
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. Magnier, Y. Ramanjooloo, R. Wainscoat, C. Waters, R. Weryk.
1.8-m Ritchey-Chretien + CCD.
K88 GINOP-KHK, Piszkesteto. Observer O. Hanyecz. Measurer K. Sarneczky.
1.02-m Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, D. Ivanic, M. Rakitic,
L. Gelo, J. Minic, F. Hrzenjak. Measurer E. Pettarin. 1.0-m f/2.9
reflector + CCD.
Q62 iTelescope Observatory, Siding Spring. Observer H. Sato. 0.51-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
Orbital elements:
P/2018 P4 (PANSTARRS)
Epoch 2018 Nov. 18.0 TT = JDT 2458440.5
T 2018 Nov. 7.30326 TT MPCW
q 3.6660684 (2000.0) P Q
n 0.05737517 Peri. 8.10873 +0.99841578 -0.03080367
a 6.6576365 Node 353.11020 -0.01281615 +0.69033517
e 0.4493439 Incl. 23.11087 +0.05478759 +0.72283365
P 17.18
>From 33 observations 2018 July 10-Aug. 18, mean residual 0".4.
P/2018 P4 (PANSTARRS)
Epoch 2036 Jan. 28.0 TT = JDT 2464720.5
T 2036 Feb. 15.68250 TT MPCW
q 3.6840733 (2000.0) P Q
n 0.05675640 Peri. 8.21144 +0.99836957 -0.03234256
a 6.7059373 Node 353.09812 -0.01164633 +0.69123252
e 0.4506251 Incl. 23.04127 +0.05587989 +0.72190828
P 17.37
>From 33 observations 2018 July 10-Aug. 18, mean residual 0".4.
P/2018 P4 (PANSTARRS)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2018 Nov. 7.36042 TT MPCW
q 3.6660281 (2000.0) P Q
n 0.05743101 Peri. 8.11729 +0.99841104 -0.03093676
a 6.6533200 Node 353.10906 -0.01273623 +0.69030283
e 0.4489927 Incl. 23.11366 +0.05489240 +0.72285886
P 17.16
>From 33 observations 2018 July 10-Aug. 18, mean residual 0".4.
Ephemeris:
P/2018 P4 (PANSTARRS)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2018 07 19 23 57 53.7 -05 33 17 3.1311 3.7265 118.6 13.8 20.2
...
2018 08 03 23 56 10.2 -04 44 29 2.9443 3.7115 133.0 11.5 20.0
...
2018 08 11 23 53 41.4 -04 24 01 2.8602 3.7043 141.1 9.9 20.0
...
2018 08 17 23 51 09.3 -04 10 57 2.8060 3.6993 147.4 8.5 19.9
2018 08 18 23 50 40.8 -04 08 56 2.7978 3.6985 148.4 8.2 19.9
2018 08 19 23 50 11.4 -04 06 59 2.7898 3.6977 149.5 8.0 19.9
...
2018 08 25 23 46 58.6 -03 56 06 2.7470 3.6932 156.0 6.4 19.9
...
2018 09 02 23 42 03.2 -03 43 30 2.7046 3.6877 164.7 4.1 19.8
...
2018 09 17 23 31 39.2 -03 22 57 2.6741 3.6791 178.3 0.5 19.8
Gareth V. Williams (C) Copyright 2018 MPC M.P.E.C. 2018-Q35
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