MPEC 2018-M83 : COMET P/2018 L4 (PANSTARRS)
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M.P.E.C. 2018-M83 Issued 2018 June 22, 20:36 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 L4 (PANSTARRS)
R. Weryk reported that this object was a possible comet in images on May
10. The object had a FWHM of 1".2, compared to the 0".7 FWHM of nearby stars,
and there was a 6" tail in P.A. ~ 200. Q. Ye reported that images on June 18.3
UTC showed a ~10" tail pointing to the SSW. E. Bryssinck reported a diffuse
appearance with a central condensation and an elongated coma 11"x18" in the N-S
direction, in images taken around June 20.95 UT. J. V. Scotti reported a 6"
coma and a 0'.2 tail in P.A. 169.
Observations:
PK18L040 C2018 05 19.31652 17 29 39.85 +27 09 39.2 20.5 rUEM083I41
PK18L040 C2018 05 19.34098 17 29 39.86 +27 09 50.9 20.6 rUEM083I41
PK18L040 C2018 05 19.37435 17 29 39.75 +27 10 09.7 21.0 rUEM083I41
PK18L040 C2018 05 19.44356 17 29 40.02 +27 10 47.5 20.9 rUEM083I41
PK18L040 C2018 06 04.52615017 27 59.879+28 27 29.38 19.9 GVEM083F51
PK18L040 C2018 06 05.38409217 27 47.864+28 27 22.90 21.4 GVEM083F52
PK18L040 C2018 06 05.39406317 27 47.644+28 27 22.96 VEM083F52
PK18L040 C2018 06 05.40397617 27 47.441+28 27 22.94 20.9 GVEM083F52
PK18L040* C2018 06 08.50985 17 26 57.146+28 22 56.71 21.0 iUEM083F51
PK18L040 C2018 06 08.52162 17 26 56.920+28 22 54.89 21.0 iUEM083F51
PK18L040 C2018 06 08.53334 17 26 56.700+28 22 52.94 21.0 iUEM083F51
PK18L040 C2018 06 08.54509 17 26 56.416+28 22 50.80 20.9 iUEM083F51
PK18L040 ^C2018 06 10.41826417 26 24.328+28 16 59.01 20.77GVEM083568
PK18L040 ^C2018 06 10.41943917 26 24.303+28 16 58.76 20.83GVEM083568
PK18L040 ^C2018 06 10.42061617 26 24.279+28 16 58.52 20.75GVEM083568
PK18L040 C2018 06 11.18874 17 26 10.77 +28 13 47.8 UEM083I52
PK18L040 C2018 06 11.20609 17 26 10.49 +28 13 43.5 UEM083I52
PK18L040 C2018 06 11.21472 17 26 10.26 +28 13 41.4 21.3 GUEM083I52
PK18L040 C2018 06 11.22930 17 26 09.93 +28 13 38.4 21.1 GUEM083V06
PK18L040 C2018 06 11.24242 17 26 09.79 +28 13 35.1 UEM083V06
PK18L040 C2018 06 11.25136 17 26 09.55 +28 13 32.6 UEM083V06
PK18L040 C2018 06 11.26000 17 26 09.43 +28 13 30.1 UEM083V06
PK18L040 KC2018 06 11.31940 17 26 08.02 +28 13 15.5 oEM083711
PK18L040 KC2018 06 11.35238 17 26 07.28 +28 13 06.2 oEM083711
PK18L040 KC2018 06 11.35770 17 26 07.20 +28 13 04.7 oEM083711
PK18L040 KC2018 06 11.36308 17 26 07.04 +28 13 03.0 oEM083711
PK18L040 KC2018 06 11.36839 17 26 06.95 +28 13 02.2 oEM083711
PK18L040 5C2018 06 11.38360 17 26 06.76 +28 12 57.3 vEM083U69
PK18L040 5C2018 06 11.38803 17 26 06.67 +28 12 55.8 20.3 wvEM083U69
PK18L040 5C2018 06 12.42803 17 25 47.50 +28 07 53.5 vEM083U69
PK18L040 5C2018 06 12.43193 17 25 47.45 +28 07 52.4 vEM083U69
PK18L040 5C2018 06 12.43583 17 25 47.39 +28 07 51.2 20.3 wvEM083U69
PK18L040 C2018 06 13.34916 17 25 30.76 +28 02 47.2 19.6 GUEM083I52
PK18L040 HC2018 06 13.34965 17 25 30.75 +28 02 47.8 19.6 RoEM083691
PK18L040 HC2018 06 13.35329 17 25 30.66 +28 02 46.3 19.8 RoEM083691
PK18L040 HC2018 06 13.35693 17 25 30.59 +28 02 44.4 19.7 RoEM083691
PK18L040 C2018 06 13.35754 17 25 30.59 +28 02 44.6 19.7 GUEM083I52
PK18L040 C2018 06 13.37374 17 25 30.20 +28 02 38.8 19.6 GUEM083I52
PK18L040 C2018 06 14.29574 17 25 13.36 +27 56 53.8 19.2 GUEM083I52
PK18L040 C2018 06 14.31235 17 25 13.02 +27 56 47.8 19.8 GUEM083I52
PK18L040 C2018 06 14.32480 17 25 12.72 +27 56 43.0 19.6 GUEM083I52
PK18L040 KC2018 06 14.95119 17 25 01.19 +27 52 23.8 UEM083587
PK18L040 KC2018 06 14.97817 17 25 00.59 +27 52 12.5 UEM083587
PK18L040 KC2018 06 14.98185 17 25 00.53 +27 52 11.0 20.2 GUEM083587
PK18L040 C2018 06 17.26873 17 24 18.40 +27 34 07.0 20.59gUEM083I41
PK18L040 C2018 06 17.31630 17 24 17.33 +27 33 42.0 19.63rUEM083I41
PK18L040 C2018 06 18.27509 17 23 59.98 +27 24 55.5 19.65rUEM083I41
PK18L040 C2018 06 18.29374 17 23 59.62 +27 24 45.2 19.60rUEM083I41
PK18L040 C2018 06 18.31594 17 23 59.09 +27 24 32.8 19.80rUEM083I41
PK18L040 KC2018 06 19.96025 17 23 29.84 +27 07 49.1 19.3 RqEM083A77
PK18L040 KC2018 06 19.99937 17 23 28.99 +27 07 23.7 19.7 RqEM083A77
PK18L040 KC2018 06 20.03845 17 23 28.23 +27 06 58.1 19.5 RqEM083A77
PK18L040 C2018 06 20.31296 17 23 23.48 +27 03 59.9 19.5 GUEM083703
PK18L040 C2018 06 20.31893 17 23 23.44 +27 03 55.8 19.5 GUEM083703
PK18L040 C2018 06 20.32226 17 23 23.37 +27 03 53.6 19.2 GUEM083I52
PK18L040 C2018 06 20.32623 17 23 23.29 +27 03 51.2 19.1 GUEM083I52
PK18L040 C2018 06 20.33087 17 23 23.21 +27 03 48.2 19.2 GUEM083703
PK18L040 C2018 06 20.33091 17 23 23.16 +27 03 48.2 19.6 GUEM083I52
PK18L040 C2018 06 20.33681 17 23 23.04 +27 03 44.4 19.5 GUEM083I52
PK18L040 IC2018 06 20.93173 17 23 13.00 +26 56 59.7 20.0 VUEM083L01
PK18L040 KC2018 06 20.94040 17 23 12.82 +26 56 53.9 18.7 RtEM083B96
PK18L040 KC2018 06 20.94857 17 23 12.74 +26 56 46.9 19.9 RtEM083B96
PK18L040 KC2018 06 20.95674 17 23 12.57 +26 56 42.2 19.7 RtEM083B96
PK18L040 KC2018 06 20.96409 17 23 12.40 +26 56 36.4 19.5 RtEM083B96
PK18L040 KC2018 06 20.96886 17 23 12.27 +26 56 34.2 20.1 VUEM083L01
PK18L040 PC2018 06 20.97213 17 23 12.14 +26 56 32.5 19.9 VUEM083L01
PK18L040 C2018 06 21.26538 17 23 07.40 +26 53 09.0 19.4 GUEM083I52
PK18L040 C2018 06 21.26921 17 23 07.31 +26 53 06.7 19.7 GUEM083I52
PK18L040 C2018 06 21.27398 17 23 07.26 +26 53 02.9 19.3 GUEM083I52
PK18L040 C2018 06 21.27820 17 23 07.11 +26 53 00.6 19.6 GUEM083I52
PK18L040 C2018 06 22.26631 17 22 50.60 +26 41 02.8 UEM083G96
PK18L040 C2018 06 22.27151 17 22 50.56 +26 40 58.3 UEM083G96
PK18L040 C2018 06 22.27671 17 22 50.46 +26 40 53.7 19.3 GUEM083G96
PK18L040 C2018 06 22.28192 17 22 50.41 +26 40 49.7 19.7 GUEM083G96
PK18L040 C2018 06 22.35374 17 22 48.94 +26 39 55.5 19.3 GUEM083I52
PK18L040 C2018 06 22.35812 17 22 48.85 +26 39 52.1 19.3 GUEM083I52
PK18L040 C2018 06 22.36686 17 22 48.59 +26 39 45.7 UEM083I52
PK18L040 KC2018 06 22.37014 17 22 48.61 +26 39 43.5 19.4 RoEM083291
PK18L040 KC2018 06 22.37763 17 22 48.45 +26 39 37.5 19.5 RoEM083291
PK18L040 KC2018 06 22.38512 17 22 48.29 +26 39 32.2 oEM083291
Observer details:
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
568 Mauna Kea. Observers R. Wainscoat, C. Crowder, A. Petric. Measurers
R. Weryk, R. Wainscoat. 3.6-m Canada-France-Hawaii Telescope + CCD.
587 Sormano. Observers P. Sicoli, A. Testa. Measurer P. Sicoli. 0.5-m f/6.8
reflector + CCD.
691 Steward Observatory, Kitt Peak. Observer M. T. Read. 0.9-m f/3 reflector
+ CCD.
703 Catalina Sky Survey. Observer G. J. Leonard. Measurers B. M. Africano,
E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller,
J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman,
F. C. Shelly. 0.68-m Schmidt + 10K CCD.
711 McDonald Observatory. Observer J. G. Ries. 2.1-m reflector + CCD + focal
reducer.
A77 Observatoire Chante-Perdrix, Dauban. Observer J.-F. Soulier. 0.20-m f/4
Newtonian reflector + CCD.
B96 Brixiis Observatory, Kruibeke. Observer E. Bryssinck. 0.4-m f/3.8
astrograph + 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.
F52 Pan-STARRS 2, 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.
G96 Mt. Lemmon Survey. Observer D. C. Fuls. Measurers B. M. Africano,
E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller,
J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman,
F. C. Shelly. 1.5-m reflector + 10K CCD.
I41 Palomar Mountain--ZTF. Observer A. U. Tomatic. Measurers Q.-Z. Ye,
F. Masci. 1.2-m Schmidt + ZTF camera, 1.2-m f/2.4 Schmidt + ZTF camera.
I52 Steward Observatory, Mt. Lemmon Station. Observers D. C. Fuls,
B. M. Africano, G. J. Leonard. Measurers B. M. Africano,
E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller,
J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman,
F. C. Shelly. 1.0-m reflector + CCD.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
U69 iTelescope SRO Observatory, Auberry. Observer H. Sato. 0.61-m f/6.5
astrograph + CCD.
V06 Catalina Sky Survey-Kuiper. Observer D. C. Fuls. 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. 1.55-m reflector + CCD.
Orbital elements:
P/2018 L4 (PANSTARRS)
Epoch 2018 July 21.0 TT = JDT 2458320.5
T 2018 July 31.76006 TT MPCW
q 1.6764108 (2000.0) P Q
n 0.09017579 Peri. 140.35638 +0.30708417 +0.91672356
a 4.9250359 Node 145.21941 -0.94653813 +0.32208943
e 0.6596145 Incl. 26.61738 -0.09881740 -0.23638171
P 10.93
From 79 observations 2018 May 19-June 22, mean residual 0".5.
P/2018 L4 (PANSTARRS)
Epoch 2029 July 3.0 TT = JDT 2462320.5
T 2029 July 10.76306 TT MPCW
q 1.7566734 (2000.0) P Q
n 0.08658454 Peri. 138.48374 +0.27206461 +0.92794074
a 5.0602949 Node 144.96311 -0.95761962 +0.28710815
e 0.6528516 Incl. 26.34447 -0.09458070 -0.23768656
P 11.38
From 79 observations 2018 May 19-June 22, mean residual 0".5.
P/2018 L4 (PANSTARRS)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2018 July 31.75752 TT MPCW
q 1.6763874 (2000.0) P Q
n 0.09014814 Peri. 140.35046 +0.30709373 +0.91673298
a 4.9260429 Node 145.22605 -0.94653872 +0.32208897
e 0.6596888 Incl. 26.61708 -0.09878207 -0.23634581
P 10.93
From 79 observations 2018 May 19-June 22, mean residual 0".5.
Ephemeris:
P/2018 L4 (PANSTARRS)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2018 05 23 17 29 44.6 +27 39 21 1.0370 1.8340 127.0 26.2 20.2
...
2018 06 07 17 27 22.4 +28 25 53 0.9575 1.7760 128.4 26.6 19.9
...
2018 06 15 17 25 00.3 +27 52 07 0.9240 1.7499 128.8 26.9 19.8
...
2018 06 21 17 23 11.8 +26 56 16 0.9030 1.7327 129.0 27.1 19.7
2018 06 22 17 22 55.0 +26 44 21 0.8999 1.7300 129.0 27.2 19.7
2018 06 23 17 22 38.8 +26 31 41 0.8969 1.7274 129.0 27.2 19.6
...
2018 06 29 17 21 17.3 +24 59 58 0.8809 1.7131 128.9 27.5 19.6
...
2018 07 07 17 20 29.5 +22 16 57 0.8660 1.6975 128.6 27.9 19.5
...
2018 07 22 17 23 40.4 +15 21 33 0.8610 1.6797 126.8 29.0 19.4
Gareth V. Williams (C) Copyright 2018 MPC M.P.E.C. 2018-M83
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