MPEC 2021-R188 : 2021 RT4
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M.P.E.C. 2021-R188 Issued 2021 September 10, 00:01 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 RT4
Observations:
K21R04T* C2021 09 08.56209302 00 53.071-03 21 42.21 20.29wUER188F51
K21R04T C2021 09 08.57987602 00 51.713-03 25 39.05 20.22wUER188F51
K21R04T C2021 09 08.59217602 00 50.829-03 28 20.55 20.24wUER188F51
K21R04T 1C2021 09 08.93749902 02 22.78 -04 37 18.8 VER188246
K21R04T 1C2021 09 08.93854202 02 22.81 -04 37 29.4 VER188246
K21R04T KC2021 09 09.01141302 02 24.18 -04 48 42.8 20.1 GVER188L01
K21R04T KC2021 09 09.01406802 02 24.06 -04 49 07.0 20.4 GVER188L01
K21R04T KC2021 09 09.01673702 02 24.03 -04 49 32.1 20.0 GVER188L01
K21R04T KC2021 09 09.01940202 02 23.93 -04 49 56.4 20.4 GVER188L01
K21R04T 1C2021 09 09.06586 02 02 22.85 -04 57 32.1 20.7 VVER188033
K21R04T 1C2021 09 09.06667 02 02 22.83 -04 57 39.0 20.6 VVER188033
K21R04T 1C2021 09 09.06747 02 02 22.82 -04 57 46.5 20.7 VVER188033
K21R04T C2021 09 09.46627 02 03 01.70 -05 47 01.3 21.0 RVER188U83
K21R04T C2021 09 09.47144 02 03 01.27 -05 47 35.8 19.2 RVER188U83
K21R04T C2021 09 09.47179 02 03 01.25 -05 47 38.3 20.2 RVER188U83
K21R04T C2021 09 09.47213 02 03 01.21 -05 47 40.4 20.4 RVER188U83
K21R04T C2021 09 09.47318 02 03 01.14 -05 47 47.6 20.0 RVER188U83
K21R04T C2021 09 09.47387 02 03 01.12 -05 47 51.9 19.7 RVER188U83
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.
246 Klet Observatory-KLENOT. Observers M. Tichy, J. Ticha. Measurer M.
Tichy. 1.06-m f/2.7 reflector + 2048x2048 CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz, I.
Smith. Measurers K. Chambers, S. Chastel, T. de Boer, J. Fairlamb, H.
Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
Weryk. 1.8-m Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, D. Pujagic, V. Dobos.
Measurer D. Pujagic. 1.0-m f/2.9 reflector + CCD.
U83 Mount Laguna Observatory. Observer J. N. Purdum. 1.02-m f/7.65
Cassegrain reflector + CCD.
Orbital elements:
2021 RT4 Earth MOID = 0.0014 AU
Epoch 2021 July 5.0 TT = JDT 2459400.5 Veres
M 345.88557 (2000.0) P Q
n 0.35306197 Peri. 149.92345 +0.70364192 +0.71009755
a 1.9826015 Node 164.74650 -0.66970895 +0.67475232
e 0.5132066 Incl. 5.55902 -0.23744047 +0.20117351
P 2.79 H 27.93 G 0.15 U 7
Residuals in seconds of arc
210908 F51 0.1+ 0.1+ 210909 L01 0.5- 0.4+ 210909 U83 0.3+ 1.4-
210908 F51 0.0 0.1+ 210909 L01 0.2+ 0.1+ 210909 U83 0.1- 1.4-
210908 F51 0.1- 0.2- 210909 L01 0.1- 0.4+ 210909 U83 0.0 1.5-
210908 246 0.3- 0.4- 210909 033 0.1+ 0.0 210909 U83 0.2- 1.3-
210908 246 0.3- 0.7- 210909 033 0.0 0.3+ 210909 U83 0.0 1.6-
210909 L01 0.2+ 0.0 210909 033 0.2+ 0.1- 210909 U83 0.5+ 1.3-
Ephemeris:
2021 RT4 a,e,i = 1.98, 0.51, 6 q = 0.9651
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 08 11 13 57 26.6 +10 36 57 0.1445 0.9658 66.8 105.3 27.6
...
2021 08 26 14 06 51.6 +11 17 41 0.06285 0.9768 55.9 121.0 26.8
...
2021 09 03 14 12 20.4 +15 03 18 0.01881 0.9970 50.6 128.6 24.9
...
2021 09 09 02 02 10.5 -04 39 11 0.01451 1.0180 137.0 42.5 20.4
2021 09 10 02 03 51.2 -06 33 25 0.02000 1.0219 137.5 41.8 21.1
2021 09 11 02 04 44.1 -07 38 21 0.02551 1.0259 138.1 40.9 21.6
...
2021 09 17 02 05 26.1 -09 48 54 0.05877 1.0525 142.7 35.4 23.3
...
2021 09 25 02 02 53.4 -10 22 42 0.1041 1.0935 149.1 28.1 24.5
...
2021 10 10 01 54 39.7 -09 57 51 0.1960 1.1836 158.8 17.8 25.7
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-R188
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