MPEC 2018-S05 : COMET C/2018 R4 (Fuls)
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M.P.E.C. 2018-S05 Issued 2018 Sept. 16, 20:07 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/2018 R4 (Fuls)
This object was reported as a comet by D. C. Fuls (703), who described a
diffuse coma of 18" diameter and a very short tail in P.A. 280 in images taken
on Sept. 9.3 UTC. K. Korlevic (L01, Sept. 9) reported a coma diameter of 16"
and an asymmetry in P.A. 253. R. A. Kowalski (I52) reported a 12" coma in
images from Sept. 10 and a 10" diffuse coma in images from Sept. 12. H. Sato
(U69, Sept. 9 and 11) reported a strongly-condensed 8" coma and a 10" tail in
P.A. 280 in stacked images. K. Sarneczky and R. Szakats (K88, Sept. 15.9 UTC)
reported a strong central condensation and a faint outer 10" coma, but no tail.
Observations:
CK18R040 C2018 08 14.79719 00 32 39.72 +18 30 06.7 19.3 RqES005D29
CK18R040 C2018 08 14.81133 00 32 39.40 +18 30 10.3 19.7 RqES005D29
CK18R040 C2018 08 14.82547 00 32 39.11 +18 30 13.8 19.2 RqES005D29
CK18R040 C2018 09 09.26958 00 17 37.63 +18 55 21.0 19.7 GVES005G96
CK18R040 C2018 09 09.27477 00 17 37.40 +18 55 20.7 19.6 GVES005G96
CK18R040 C2018 09 09.27995 00 17 37.17 +18 55 20.1 20.0 GVES005G96
CK18R040 C2018 09 09.28512 00 17 36.91 +18 55 19.3 19.7 GVES005G96
CK18R040* C2018 09 09.31121 00 17 35.79 +18 55 18.4 19.1 GVES005703
CK18R040 C2018 09 09.31652 00 17 35.35 +18 55 16.8 19.1 GVES005703
CK18R040 C2018 09 09.32181 00 17 34.95 +18 55 15.5 18.6 GVES005703
CK18R040 C2018 09 09.32712 00 17 34.80 +18 55 13.6 19.1 GVES005703
CK18R040 C2018 09 09.42114 00 17 30.48 +18 55 05.9 20.1 GVES005I52
CK18R040 C2018 09 09.42921 00 17 30.06 +18 55 04.2 19.4 GVES005I52
CK18R040 C2018 09 09.43330 00 17 29.89 +18 55 03.9 20.0 GVES005I52
CK18R040 5C2018 09 09.49761 00 17 26.88 +18 54 55.8 VES005U69
CK18R040 5C2018 09 09.50028 00 17 26.73 +18 54 55.5 19.6 GVES005U69
CK18R040 KC2018 09 09.91278800 17 08.16 +18 54 10.6 20.3 GVES005L01
CK18R040 KC2018 09 09.92433 00 17 07.63 +18 54 09.1 19.9 GVES005595
CK18R040 KC2018 09 09.92963500 17 07.37 +18 54 09.0 20.2 GVES005L01
CK18R040 KC2018 09 09.93189 00 17 07.24 +18 54 07.5 19.3 GVES005595
CK18R040 9C2018 09 09.94480 00 17 06.81 +18 54 08.0 UES005G40
CK18R040 KC2018 09 09.96638 00 17 05.77 +18 54 04.1 19.4 RqES005C10
CK18R040 9C2018 09 09.97066 00 17 05.57 +18 54 04.7 20.0 VUES005G40
CK18R040 KC2018 09 09.97972 00 17 05.06 +18 54 02.3 19.5 RqES005C10
CK18R040 KC2018 09 09.99307 00 17 04.37 +18 54 00.7 19.6 RqES005C10
CK18R040 "C2018 09 10.00029 00 17 04.17 +18 54 02.2 20.2 VqES005G40
CK18R040 "C2018 09 10.01422 00 17 03.52 +18 54 00.6 19.7 VqES005G40
CK18R040 "C2018 09 10.02855 00 17 02.83 +18 53 58.9 19.6 VqES005G40
CK18R040 C2018 09 10.07642800 17 00.548+18 53 53.50 20.1 GVES005J04
CK18R040 C2018 09 10.07752800 17 00.521+18 53 53.20 20.2 GVES005J04
CK18R040 C2018 09 10.07862900 17 00.468+18 53 53.34 19.8 GVES005J04
CK18R040 C2018 09 10.08088200 17 00.322+18 53 53.04 19.9 GVES005J04
CK18R040 C2018 09 10.08212600 17 00.279+18 53 52.61 19.7 GVES005J04
CK18R040 C2018 09 10.30723 00 16 49.97 +18 53 26.5 19.8 GVES005I52
CK18R040 C2018 09 10.31136 00 16 49.80 +18 53 25.8 19.5 GVES005I52
CK18R040 C2018 09 11.18581 00 16 09.52 +18 51 38.1 19.2 G ES005I52
CK18R040 C2018 09 11.19545 00 16 09.10 +18 51 36.6 19.5 G ES005I52
CK18R040 C2018 09 11.20130 00 16 08.73 +18 51 36.3 19.8 G ES005I52
CK18R040 C2018 09 11.20569 00 16 08.58 +18 51 36.6 19.7 G ES005I52
CK18R040 5C2018 09 11.29231 00 16 04.45 +18 51 25.0 VES005U69
CK18R040 5C2018 09 11.29519 00 16 04.30 +18 51 24.7 VES005U69
CK18R040 5C2018 09 11.29807 00 16 04.18 +18 51 24.7 19.2 GVES005U69
CK18R040 KC2018 09 11.88505 00 15 36.98 +18 50 05.7 19.8 RqES005K61
CK18R040 KC2018 09 11.88705 00 15 36.88 +18 50 05.0 19.7 RqES005K61
CK18R040 KC2018 09 11.97274 00 15 32.69 +18 49 54.4 20.3 VqES005A71
CK18R040 KC2018 09 11.98529 00 15 32.17 +18 49 50.9 20.7 VqES005A71
CK18R040 C2018 09 12.06269 00 15 28.47 +18 49 41.9 20.9 VSES005033
CK18R040 C2018 09 12.06791 00 15 28.21 +18 49 41.1 21.0 VSES005033
CK18R040 C2018 09 12.07293 00 15 27.97 +18 49 40.2 21.1 VSES005033
CK18R040 C2018 09 12.07797 00 15 27.73 +18 49 39.8 21.1 VSES005033
CK18R040 C2018 09 12.08308 00 15 27.47 +18 49 39.0 20.6 VSES005033
CK18R040 C2018 09 12.08814 00 15 27.24 +18 49 38.2 20.9 VSES005033
CK18R040 C2018 09 12.27036 00 15 18.91 +18 49 14.0 19.1 G ES005I52
CK18R040 C2018 09 12.28272 00 15 18.40 +18 49 12.3 19.8 G ES005I52
CK18R040 C2018 09 12.28936 00 15 18.06 +18 49 12.2 20.1 G ES005I52
CK18R040 C2018 09 12.29477 00 15 17.76 +18 49 11.0 19.2 G ES005I52
CK18R040 C2018 09 12.30114 00 15 17.35 +18 49 11.5 18.9 G ES005703
CK18R040 C2018 09 12.30684 00 15 17.11 +18 49 09.0 19.1 G ES005703
CK18R040 C2018 09 12.31255 00 15 16.88 +18 49 08.6 19.2 G ES005703
CK18R040 C2018 09 12.31956 00 15 16.49 +18 49 08.0 19.1 G ES005703
CK18R040 KC2018 09 12.91449 00 14 48.94 +18 47 42.0 19.5 qES005215
CK18R040 KC2018 09 12.91705 00 14 48.77 +18 47 40.4 20.1 qES005215
CK18R040 KC2018 09 12.91962 00 14 48.67 +18 47 39.7 19.6 qES005215
CK18R040 KC2018 09 14.05115 00 13 55.28 +18 44 47.6 19.7 RoES005K88
CK18R040 KC2018 09 14.05923 00 13 54.92 +18 44 45.9 19.8 RoES005K88
CK18R040 KC2018 09 14.06732 00 13 54.53 +18 44 44.6 19.7 RoES005K88
CK18R040 C2018 09 14.21053 00 13 48.06 +18 44 23.2 19.6 GVES005I52
CK18R040 C2018 09 14.22020 00 13 47.56 +18 44 19.8 19.3 GVES005I52
CK18R040 C2018 09 14.23267 00 13 46.82 +18 44 17.0 VES005I52
CK18R040 KC2018 09 14.29504 00 13 43.86 +18 44 12.1 20.5 GUES005W96
CK18R040 KC2018 09 14.31800 00 13 42.81 +18 44 09.0 20.2 GUES005W96
CK18R040 KC2018 09 14.93574100 13 13.86 +18 42 22.1 19.6 RqES005K63
CK18R040 KC2018 09 14.93902800 13 13.71 +18 42 21.4 19.6 RqES005K63
CK18R040 KC2018 09 14.94269700 13 13.52 +18 42 20.7 19.7 RqES005K63
CK18R040 KC2018 09 15.39430 00 12 52.01 +18 41 05.1 oES005711
CK18R040 KC2018 09 15.39768 00 12 51.83 +18 41 04.7 oES005711
CK18R040 IC2018 09 15.40092 00 12 51.68 +18 41 04.2 oES005711
CK18R040 KC2018 09 15.82562 00 12 31.94 +18 39 46.9 19.6 RqES005C10
CK18R040 KC2018 09 15.83898 00 12 31.32 +18 39 45.9 19.8 RqES005C10
CK18R040 KC2018 09 15.85235 00 12 30.67 +18 39 44.0 19.9 RqES005C10
CK18R040 KC2018 09 15.92307 00 12 27.23 +18 39 30.9 19.9 RoES005K88
CK18R040 KC2018 09 15.92953 00 12 26.93 +18 39 29.5 20.0 RoES005K88
CK18R040 KC2018 09 15.93599 00 12 26.61 +18 39 28.8 19.8 RoES005K88
CK18R040 KC2018 09 15.96323 00 12 25.34 +18 39 23.5 20.1 GVES005104
CK18R040 KC2018 09 15.97665 00 12 24.75 +18 39 20.6 19.9 GVES005104
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers C. Hoegner,
B. Stecklum. Measurer B. Stecklum. 1.34-m f/3 Schmidt + CCD.
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri. Measurers
P. Bacci, L. Tesi, G. Fagioli. 0.60-m reflector + CCD.
215 Buchloe. Observer W. Hasubick. 0.44-m f/4.6 reflector + CCD.
595 Farra d\'Isonzo. Observers E. Pettarin, F. Piani. Measurer
E. Pettarin. 0.61-m f/4.0 reflector + CCD.
703 Catalina Sky Survey. Observers D. C. Fuls, H. Groeller. Measurers
B. M. Africano, E. J. Christensen, G. A. Farneth, 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, Fort Davis. Observer J. G. Ries. 2.1-m reflector
+ CCD + focal reducer.
A71 Stixendorf. Observers M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann.
Measurer M. Jaeger. 0.3-m f/4 reflector + CCD.
C10 Maisoncelles. Observer J.-F. Soulier. 0.30-m f/3.8 Newtonian 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. Observers B. Lutkenhoner, J. Tuten,
G. Gasparovic, Y. Chen. Measurers B. Lutkenhoner, G. Gasparovic, Y. Chen,
G. Y. Gasparovic. 0.43-m f/6.8 Corrected Dall-Kirkham + CCD.
G96 Mt. Lemmon Survey. Observer A. D. Grauer. Measurers B. M. Africano,
E. J. Christensen, G. A. Farneth, 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.
I52 Steward Observatory, Mt. Lemmon Station. Observers R. A. Kowalski,
E. J. Christensen, H. Groeller. Measurers B. M. Africano,
E. J. Christensen, G. A. Farneth, 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.
J04 ESA Optical Ground Station, Tenerife. Observer D. Abreu. Measurers
M. Micheli, D. Koschny, A. Knoefel, M. Busch, E. Schwab. 1.0-m f/4.4
reflector + CCD.
K61 Rokycany Observatory. Observer M. Adamovsky. 0.51-m f/6.8 reflector +
CCD.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci.
0.41-m f/3.2 Newtonian reflector + CCD.
K88 GINOP-KHK, Piszkesteto. Observer R. Szakats. Measurer
K. Sarneczky. 0.60-m Schmidt + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, I. Lyon, G. Kervina.
Measurer 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.
W96 CAO, San Pedro de Atacama (since 2013). Observers A. Maury, J.-B. de
Vanssay, T. Noel. Measurer T. Noel. 0.4-m f/5.4 Ritchey-Chretien + CCD.
Orbital elements:
C/2018 R4 (Fuls)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2018 Mar. 3.52941 TT MPCW
q 1.7094607 (2000.0) P Q
z +0.0034852 Peri. 345.11184 +0.23966561 +0.95439265
+/-0.0003090 Node 298.47889 -0.86876198 +0.12897033
e 0.9940422 Incl. 11.68552 -0.43337399 +0.26926068
From 79 observations 2018 Aug. 14-Sept. 15, mean residual 0".5.
Ephemeris:
C/2018 R4 (Fuls)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2018 08 17 00 31 50.2 +18 37 58 1.9502 2.6912 127.7 17.3 19.7
...
2018 09 01 00 23 36.3 +19 02 43 1.9585 2.8262 142.4 12.6 20.0
...
2018 09 09 00 17 49.8 +18 55 50 1.9812 2.8989 150.2 9.9 20.1
...
2018 09 15 00 13 10.8 +18 42 14 2.0081 2.9537 155.6 8.1 20.2
2018 09 16 00 12 23.6 +18 39 19 2.0135 2.9628 156.5 7.8 20.2
2018 09 17 00 11 36.4 +18 36 15 2.0191 2.9720 157.3 7.5 20.3
...
2018 09 23 00 06 55.0 +18 14 33 2.0585 3.0270 161.5 6.0 20.4
...
2018 10 01 00 00 58.1 +17 38 32 2.1260 3.1006 164.0 5.1 20.6
...
2018 10 16 23 51 51.2 +16 19 28 2.2998 3.2391 156.6 7.0 20.9
Gareth V. Williams (C) Copyright 2018 MPC M.P.E.C. 2018-S05
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