MPEC 2020-F168 : COMET C/2019 S4 (Lemmon)
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M.P.E.C. 2020-F168 Issued 2020 March 28, 01:29 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 C/2019 S4 (Lemmon)
This object, originally designated A/2019 S4 (MPEC 2019-T83), has been
found to display cometary features. Reports are as follows:
OC Date Reporter Coma Tail PA Exposures
568 2019-10-24 M. Micheli 10" 190
H06 2019-12-27 H. Sato 8" 7x60s
461 2019-11-24 K. Sarneczky 2.2" 10" 140 7x120s
461 2019-12-26 K. Sarneczky 4" 15" 90 5x120s
461 2020-01-01 K. Sarneczky 5" 10" 90 7x120s
Observations:
CK19S040* C2019 09 17.45385 04 56 04.21 +55 27 22.9 20.3 GVEF168G96
CK19S040 C2019 09 17.45920 04 56 04.07 +55 27 28.8 21.2 GVEF168G96
CK19S040 C2019 09 17.46455 04 56 04.00 +55 27 35.2 20.7 GVEF168G96
CK19S040 C2019 09 17.46990 04 56 03.97 +55 27 41.5 22.0 GVEF168G96
CK19S040 C2019 09 17.49346 04 56 03.63 +55 28 08.8 VEF168G96
CK19S040 C2019 09 17.49847 04 56 03.62 +55 28 14.8 VEF168G96
CK19S040 C2019 09 17.50347 04 56 03.54 +55 28 20.8 VEF168G96
CK19S040 C2019 09 17.50849 04 56 03.50 +55 28 27.5 VEF168G96
CK19S040 C2019 09 18.43236 04 55 50.49 +55 46 06.1 21.1 GVEF168G96
CK19S040 C2019 09 18.43659 04 55 50.42 +55 46 11.4 21.2 GVEF168G96
CK19S040 C2019 09 18.44091 04 55 50.44 +55 46 16.0 21.6 GVEF168G96
CK19S040 C2019 09 18.44522 04 55 50.29 +55 46 20.7 20.6 GVEF168G96
CK19S040 C2019 09 19.49523 04 55 33.21 +56 06 35.7 21.4 GVEF168G96
CK19S040 C2019 09 19.49982 04 55 33.09 +56 06 41.2 20.9 GVEF168G96
CK19S040 C2019 09 19.50416 04 55 33.02 +56 06 45.8 20.9 GVEF168G96
CK19S040 pC2019 09 20.06548004 55 22.84 +56 17 37.9 21.5 GVEF168L01
CK19S040 KC2019 09 20.07181504 55 22.72 +56 17 45.1 21.5 GVEF168L01
CK19S040 KC2019 09 20.07916404 55 22.62 +56 17 54.0 21.2 GVEF168L01
CK19S040 KC2019 09 27.00752 04 52 08.82 +58 35 21.2 20.7 RoEF168K88
CK19S040 KC2019 09 27.02291 04 52 08.25 +58 35 39.8 21.2 RoEF168K88
CK19S040 KC2019 09 27.03375 04 52 07.81 +58 35 53.1 20.8 RoEF168K88
CK19S040 |C2019 09 27.36736 04 51 54.96 +58 42 39.6 VEF168H06
CK19S040 |C2019 09 27.37519 04 51 54.72 +58 42 49.1 21.3 GVEF168H06
CK19S040 C2019 09 30.46864 04 49 37.93 +59 45 54.7 21.2 GVEF168I52
CK19S040 C2019 09 30.47393 04 49 37.70 +59 46 01.2 21.0 GVEF168I52
CK19S040 C2019 09 30.48468 04 49 37.19 +59 46 14.6 21.4 GVEF168I52
CK19S040 C2019 10 02.41821 04 47 54.70 +60 26 04.1 oEF168711
CK19S040 C2019 10 02.42166 04 47 54.54 +60 26 08.1 oEF168711
CK19S040 C2019 10 02.42502 04 47 54.33 +60 26 12.2 oEF168711
CK19S040 C2019 10 02.49088 04 47 50.52 +60 27 34.3 20.8 GVEF168I52
CK19S040 C2019 10 02.49383 04 47 50.36 +60 27 38.0 21.1 GVEF168I52
CK19S040 C2019 10 02.49679 04 47 50.17 +60 27 40.9 20.5 GVEF168I52
CK19S040 C2019 10 02.49975 04 47 50.00 +60 27 44.6 20.6 GVEF168I52
CK19S040 C2019 10 03.47184 04 46 52.86 +60 47 51.1 VEF168I52
CK19S040 C2019 10 03.47455 04 46 52.76 +60 47 54.6 VEF168I52
CK19S040 C2019 10 03.48122 04 46 52.30 +60 48 03.1 VEF168I52
CK19S040 C2019 10 03.48482 04 46 52.04 +60 48 07.1 21.0 GVEF168I52
CK19S040 _C2019 10 24.50665904 06 31.868+67 54 41.82 20.9 GVEF168568
CK19S040 _C2019 10 24.50853404 06 31.506+67 54 44.02 20.4 GVEF168568
CK19S040 _C2019 10 24.51040904 06 31.166+67 54 46.00 20.4 GVEF168568
CK19S040 KC2019 10 27.01188103 58 26.59 +68 40 13.3 20.4 GVEF168C95
CK19S040 KC2019 10 27.01640603 58 25.52 +68 40 18.6 20.0 GVEF168C95
CK19S040 KC2019 10 27.02091403 58 24.78 +68 40 22.9 19.6 GVEF168C95
CK19S040 KC2019 10 30.58269 03 45 25.05 +69 40 51.3 qEF168Q11
CK19S040 KC2019 10 30.58840 03 45 23.71 +69 40 57.3 qEF168Q11
CK19S040 KC2019 10 30.59448 03 45 22.29 +69 41 03.2 19.4 RqEF168Q11
CK19S040 |C2019 11 02.29811 03 34 18.03 +70 22 52.8 VEF168H06
CK19S040 |C2019 11 02.30350 03 34 16.55 +70 22 57.5 19.6 GVEF168H06
CK19S040 KC2019 11 24.89552 01 33 13.33 +72 45 51.7 19.5 RoEF168461
CK19S040 KC2019 11 24.89984 01 33 11.88 +72 45 50.9 19.7 RoEF168461
CK19S040 KC2019 11 24.90417 01 33 10.42 +72 45 50.0 19.4 RoEF168461
CK19S040 KC2019 11 24.90850 01 33 08.95 +72 45 49.3 19.7 RoEF168461
CK19S040 KC2019 11 24.91283 01 33 07.53 +72 45 48.6 19.5 RoEF168461
CK19S040 KC2019 11 24.91716 01 33 06.07 +72 45 47.8 19.5 RoEF168461
CK19S040 |C2019 12 17.17414 23 59 01.35 +69 21 31.9 VEF168H06
CK19S040 |C2019 12 17.17776 23 59 00.78 +69 21 29.2 18.9 GVEF168H06
CK19S040 KC2019 12 26.76912 23 37 43.96 +67 18 21.8 19.3 RoEF168461
CK19S040 KC2019 12 26.77720 23 37 43.14 +67 18 15.6 19.2 RoEF168461
CK19S040 KC2019 12 26.78527 23 37 42.26 +67 18 09.3 19.4 RoEF168461
CK19S040 KC2019 12 29.75801 23 32 56.00 +66 40 57.9 19.3 RqEF168215
CK19S040 KC2019 12 29.76057 23 32 55.88 +66 40 55.2 19.9 RqEF168215
CK19S040 KC2019 12 29.76314 23 32 55.46 +66 40 54.5 19.3 RqEF168215
CK19S040 KC2019 12 31.73965 23 30 09.13 +66 16 47.5 19.0 RoEF168461
CK19S040 KC2019 12 31.74389 23 30 08.83 +66 16 44.4 19.5 RoEF168461
CK19S040 KC2020 01 01.75257 23 28 50.80 +66 04 39.6 19.7 RoEF168461
CK19S040 KC2020 01 01.76384 23 28 49.93 +66 04 31.6 19.9 RoEF168461
CK19S040 KC2020 01 01.90800 23 28 39.16 +66 02 47.2 19.4 RqEF168L27
CK19S040 KC2020 01 01.93897 23 28 36.90 +66 02 23.8 19.3 RqEF168L27
CK19S040 KC2020 02 20.75447 23 18 10.27 +61 08 40.5 19.7 RoEF168461
CK19S040 KC2020 02 20.76308 23 18 10.46 +61 08 40.7 19.8 RoEF168461
CK19S040 KC2020 02 20.77172 23 18 10.66 +61 08 41.0 19.7 RoEF168461
Observer details:
215 Buchloe. Observer W. Hasubick. 0.44-m f/4.6 reflector + CCD.
461 University of Szeged, Piszkesteto Stn. (Konkoly). Observers K. Sarneczky,
B. Seli, C. Kalup. Measurer K. Sarneczky. 1.02-m Ritchey-Chretien + CCD,
0.60-m Schmidt + CCD.
568 Mauna Kea. Observers K. J. Meech, J. Kleyna. Measurers M. Micheli, J.
Kleyna. 3.6-m Canada-France-Hawaii Telescope + CCD.
711 McDonald Observatory, Fort Davis. Observers J. G. Ries, J. W. Kuehne.
Measurer J. G. Ries. 2.1-m reflector + CCD + focal reducer.
C95 SATINO Remote Observatory, Haute Provence. Observer J. Jahn. 0.60-m f/3.2
Newtonian reflector + CCD.
G96 Mt. Lemmon Survey. Observer D. Rankin. 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, T. A. Pruyne, D.
Rankin, 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.
I52 Steward Observatory, Mt. Lemmon Station. Observers H. Groeller, T. A.
Pruyne. 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, T. A. Pruyne, D. Rankin, R. L. Seaman, F. C. Shelly. 1.0-m
reflector + CCD.
K88 GINOP-KHK, Piszkesteto. Observers K. Sarneczky, B. Cseh. Measurer K.
Sarneczky. 1.02-m Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, F. Valentine. Measurer
K. Korlevic. 1.0-m f/2.9 reflector + CCD.
L27 29PREMOTE Observatory, Dauban. Observer J.-F. Soulier. 0.20-m f/4
Newtonian reflector + CCD.
Q11 Shinshiro. Observer T. Ikemura. Measurer H. Sato. 0.35-m f/5 reflector +
CCD.
Orbital elements:
C/2019 S4 (Lemmon)
Epoch 2020 Apr. 21.0 TT = JDT 2458960.5
T 2020 Apr. 7.94405 TT Rudenko
q 3.4416962 (2000.0) P Q
z +0.0041600 Peri. 71.35586 +0.17416599 -0.41760502
+/-0.0000078 Node 63.16844 -0.12879824 -0.90750243
e 0.9856825 Incl. 92.02443 +0.97625674 -0.04522594
From 71 observations 2019 Sept. 17-2020 Feb. 20, mean residual 0".4.
C/2019 S4 (Lemmon)
Epoch 2020 May 31.0 TT = JDT 2459000.5
T 2020 Apr. 7.94618 TT Rudenko
q 3.4416990 (2000.0) P Q
z +0.0041808 Peri. 71.35644 +0.17416269 -0.41761500
+/-0.0000078 Node 63.16792 -0.12880818 -0.90749743
e 0.9856110 Incl. 92.02432 +0.97625602 -0.04523418
From 71 observations 2019 Sept. 17-2020 Feb. 20, mean residual 0".4.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2020 02 27 23 20 26.8 +61 17 13 3.6641 3.4623 70.5 15.6 19.7
...
2020 03 13 23 26 45.3 +62 16 02 3.7466 3.4500 65.2 15.2 19.7
...
2020 03 21 23 30 16.2 +63 08 16 3.7782 3.4457 63.2 15.0 19.8
...
2020 03 27 23 32 48.9 +63 56 34 3.7962 3.4435 62.1 14.8 19.8
2020 03 28 23 33 13.4 +64 05 21 3.7987 3.4432 61.9 14.8 19.8
2020 03 29 23 33 37.6 +64 14 21 3.8011 3.4429 61.8 14.8 19.8
...
2020 04 04 23 35 53.7 +65 12 38 3.8124 3.4419 61.1 14.7 19.8
...
2020 04 12 23 38 22.0 +66 41 24 3.8203 3.4419 60.7 14.7 19.8
...
2020 04 27 23 40 02.5 +70 00 17 3.8148 3.4462 61.3 14.8 19.8
M. P. C. Staff (C) Copyright 2020 MPC M.P.E.C. 2020-F168
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