MPEC 2021-G115 : 2021 GR4
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M.P.E.C. 2021-G115 Issued 2021 April 9, 03:59 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
2021 GR4
Observations:
K21G04R* C2021 04 07.38989316 44 45.74 +24 09 48.4 20.85GVEG115G96
K21G04R C2021 04 07.39551816 44 52.34 +24 09 09.4 VEG115G96
K21G04R C2021 04 07.40374816 45 02.02 +24 08 10.4 20.82GVEG115G96
K21G04R C2021 04 07.40936316 45 08.69 +24 07 28.9 20.76GVEG115G96
K21G04R KC2021 04 07.47553416 46 27.20 +23 59 24.0 20.78GVEG115I52
K21G04R KC2021 04 07.47850516 46 30.75 +23 59 00.6 19.95GVEG115I52
K21G04R KC2021 04 07.48147716 46 34.29 +23 58 38.5 20.63GVEG115I52
K21G04R KC2021 04 08.11206417 00 56.04 +22 28 59.7 20.5 GVEG115L01
K21G04R KC2021 04 08.11414117 00 58.96 +22 28 39.7 20.4 GVEG115L01
K21G04R KC2021 04 08.11619117 01 01.88 +22 28 20.3 21.2 GVEG115L01
K21G04R bC2021 04 08.11840717 01 05.06 +22 27 59.9 21.4 GVEG115L01
K21G04R bC2021 04 08.12037217 01 07.85 +22 27 40.9 21.6 GVEG115L01
K21G04R KC2021 04 08.39488017 08 12.91 +21 42 03.9 20.01GVEG115I52
K21G04R KC2021 04 08.39636617 08 15.15 +21 41 48.2 20.11GVEG115I52
K21G04R KC2021 04 08.39785417 08 17.42 +21 41 32.9 20.01GVEG115I52
K21G04R KC2021 04 08.39933917 08 19.67 +21 41 17.3 19.56GVEG115I52
K21G04R 1C2021 04 09.07724 17 27 52.16 +19 22 26.6 21.2 VVEG115033
K21G04R 1C2021 04 09.07787 17 27 53.30 +19 22 18.0 21.1 VVEG115033
K21G04R 1C2021 04 09.07851 17 27 54.47 +19 22 09.3 20.8 VVEG115033
K21G04R 1C2021 04 09.07914 17 27 55.61 +19 22 00.7 20.5 VVEG115033
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers S. Melnikov, C.
Hoegner, U. Laux, F. Ludwig, B. Stecklum. Measurer B. Stecklum. 1.34-m
f/3 Schmidt + CCD.
G96 Mt. Lemmon Survey. Observer G. J. Leonard. Measurers 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, K. W. Wierzchos. 1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observers R. A. Kowalski, D.
Rankin. Measurers 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, K. W.
Wierzchos. 1.0-m reflector + CCD.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
Orbital elements:
2021 GR4 Earth MOID = 0.0096 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Bell
M 265.32549 (2000.0) P Q
n 0.58059217 Peri. 241.30848 -0.07938506 +0.98690137
a 1.4230558 Node 25.33262 -0.76107204 +0.03098365
e 0.4087278 Incl. 19.16145 -0.64379140 -0.15832149
P 1.70 H 25.11 G 0.15 U 8
Residuals in seconds of arc
210407 G96 0.2+ 0.6- 210408 L01 0.1+ 0.1+ 210408 I52 0.0- 0.0+
210407 G96 0.1- 0.4+ 210408 L01 0.2- 0.1- 210408 I52 0.2- 0.0+
210407 G96 0.5- 0.2+ 210408 L01 0.1- 0.0+ 210409 033 0.3+ 0.1-
210407 G96 0.3+ 0.9- 210408 L01 0.4+ 0.7+ 210409 033 0.0+ 0.0-
210407 I52 0.0+ 0.8+ 210408 L01 0.4+ 0.5+ 210409 033 0.0- 0.1+
210407 I52 0.0+ 0.2- 210408 I52 0.2+ 0.1- 210409 033 0.3- 0.2+
210407 I52 0.1- 0.1+ 210408 I52 0.0- 0.3-
Ephemeris:
2021 GR4 a,e,i = 1.42, 0.41, 19 q = 0.8414
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 10 14 32 22.5 +29 45 50 0.3076 1.2074 128.1 40.3 24.5
...
2021 03 25 15 03 12.1 +30 29 43 0.1690 1.1108 128.8 44.4 23.2
...
2021 04 02 15 39 04.0 +29 14 23 0.09858 1.0605 126.1 49.6 22.1
...
2021 04 08 16 58 11.3 +22 47 39 0.04978 1.0241 116.0 61.5 20.8
2021 04 09 17 25 22.4 +19 42 06 0.04283 1.0181 111.7 66.1 20.6
2021 04 10 18 00 29.3 +15 07 06 0.03676 1.0122 105.4 72.6 20.5
...
2021 04 16 23 04 43.8 -27 14 01 0.04266 0.9780 52.3 125.7 23.5
...
2021 04 24 01 09 09.4 -32 29 35 0.1073 0.9362 47.3 127.9 25.6
...
2021 05 09 01 53 50.9 -30 01 25 0.2421 0.8745 50.2 117.5 26.4
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-G115
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