MPEC 2021-A171 : 2021 AR5
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M.P.E.C. 2021-A171 Issued 2021 January 13, 20:34 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 AR5
Observations:
K21A05R* C2021 01 12.22839204 59 09.84 -02 21 35.0 VEA171G96
K21A05R C2021 01 12.23351704 59 13.80 -02 21 27.5 20.10GVEA171G96
K21A05R C2021 01 12.23865504 59 17.80 -02 21 19.8 19.55GVEA171G96
K21A05R C2021 01 12.24377304 59 21.77 -02 21 12.3 19.90GVEA171G96
K21A05R mC2021 01 12.29302105 00 00.18 -02 19 59.3 20.00GVEA171I52
K21A05R mC2021 01 12.29344205 00 00.54 -02 19 59.5 19.22GVEA171I52
K21A05R mC2021 01 12.29386205 00 00.77 -02 19 58.7 VEA171I52
K21A05R mC2021 01 12.29428205 00 01.17 -02 19 57.3 20.18GVEA171I52
K21A05R C2021 01 12.31826205 00 31.136-02 18 36.47 19.41wUEA171F52
K21A05R C2021 01 12.34422905 00 50.880-02 17 58.57 19.87wUEA171F52
K21A05R C2021 01 12.35719105 01 00.684-02 17 39.61 19.63wUEA171F52
K21A05R KC2021 01 12.79437905 07 18.38 -02 08 29.1 19.1 GVEA171104
K21A05R KC2021 01 12.79781105 07 21.12 -02 08 23.3 18.1 GVEA171K63
K21A05R KC2021 01 12.80132205 07 23.67 -02 08 19.4 19.3 GVEA171104
K21A05R KC2021 01 12.80785305 07 28.65 -02 08 10.4 VEA171104
K21A05R KC2021 01 12.81627305 07 35.04 -02 07 57.2 17.4 GVEA171K63
K21A05R KC2021 01 12.83319205 07 47.90 -02 07 33.8 18.3 GVEA171K63
K21A05R KC2021 01 12.85050 05 08 00.21 -02 07 14.6 19.2 GVEA171595
K21A05R KC2021 01 12.85740 05 08 05.37 -02 07 03.9 19.2 GVEA171595
K21A05R KC2021 01 12.89720805 08 38.05 -02 06 27.8 19.5 GVEA171Z99
K21A05R KC2021 01 12.90092205 08 40.84 -02 06 22.3 19.3 GVEA171Z99
K21A05R KC2021 01 12.90463505 08 43.68 -02 06 16.8 19.6 GVEA171Z99
K21A05R IC2021 01 12.92171105 08 53.62 -02 05 29.0 20.0 GVEA171L01
K21A05R KC2021 01 12.92380205 08 55.18 -02 05 26.1 19.6 GVEA171L01
K21A05R KC2021 01 12.92484505 08 55.96 -02 05 24.4 19.6 GVEA171L01
K21A05R KC2021 01 12.92588705 08 56.76 -02 05 23.0 19.5 GVEA171L01
K21A05R KC2021 01 12.92719005 08 57.73 -02 05 21.1 19.6 GVEA171L01
K21A05R KC2021 01 12.93751 05 09 06.50 -02 05 08.4 VEA171204
K21A05R KC2021 01 12.94306 05 09 10.69 -02 04 59.8 VEA171204
K21A05R KC2021 01 12.94861 05 09 14.87 -02 04 51.7 19.6 GVEA171204
K21A05R KC2021 01 13.03051 05 10 35.16 -02 02 18.3 19.5 GVEA171W34
K21A05R KC2021 01 13.04600 05 10 46.63 -02 01 56.4 20.2 GVEA171W34
K21A05R KC2021 01 13.06181 05 10 58.30 -02 01 33.3 19.7 GVEA171W34
K21A05R KC2021 01 13.09524605 11 29.11 -02 00 34.7 19.18GVEA171I52
K21A05R KC2021 01 13.09599505 11 29.63 -02 00 33.7 19.65GVEA171I52
K21A05R KC2021 01 13.09673605 11 30.21 -02 00 32.5 19.90GVEA171I52
K21A05R KC2021 01 13.10032 05 11 29.28 -02 00 50.5 19.5 GVEA171H36
K21A05R KC2021 01 13.11356 05 11 39.03 -02 00 32.0 20.2 GVEA171H36
K21A05R KC2021 01 13.11867 05 11 42.76 -02 00 25.0 19.5 GVEA171H36
K21A05R KC2021 01 13.14547805 12 04.82 -01 59 33.5 19.8 VqEA171858
K21A05R KC2021 01 13.15222205 12 09.67 -01 59 24.0 19.7 VqEA171858
K21A05R KC2021 01 13.15805305 12 13.92 -01 59 15.9 19.7 VqEA171858
K21A05R C2021 01 13.31377105 14 17.767-01 54 38.77 19.68wUEA171F52
K21A05R C2021 01 13.32610405 14 26.389-01 54 21.42 19.54wUEA171F52
K21A05R C2021 01 13.35075705 14 43.547-01 53 46.36 19.90wUEA171F52
K21A05R KC2021 01 13.78160 05 20 27.89 -01 44 58.0 20.1 GVEA171K83
K21A05R KC2021 01 13.78923 05 20 33.26 -01 44 47.0 20.0 GVEA171K83
K21A05R KC2021 01 13.79687 05 20 38.66 -01 44 35.8 19.8 GVEA171K83
Observer details:
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri. Measurers
P. Bacci, L. Tesi, G. Fagioli. 0.60-m reflector + CCD.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector +
CCD.
595 Farra d'Isonzo. Observers S. Aschi, E. Pettarin. Measurer S. Aschi.
0.40-m f/5.15 reflector + CCD.
858 Tebbutt Observatory, Edgewood. Observer F. B. Zoltowski. 0.51-m Schmidt-
Cassegrain + CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, T. Dukes, T. Lowe, A.
Schultz, M. Willman. Measurers K. Chambers, S. Chastel, T. de Boer, L.
Denneau, J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer H. Groeller. 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.
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.56-m reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observers T. A. Pruyne, E. J.
Christensen. 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.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci. 0.41-m
f/3.2 Newtonian reflector + CCD.
K83 Beppe Forti Astronomical Observatory, Montelupo. Observers M. Tombelli,
M. Poggianti, E. Venticinque. Measurers M. Tombelli, A. Mazzanti, F.
Bernardi, M. Iozzi. 0.40-m f/8 Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
W34 Squirrel Valley Observatory, Columbus. Observer R. L. Flynn. 0.36-m
Schmidt-Cassegrain + CCD.
Z99 Clixby Observatory, Cleethorpes. Observer A. Mickleburgh. 0.36-m f/8
Schmidt-Cassegrain + CCD.
Orbital elements:
2021 AR5 Earth MOID = 0.0046 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 7.00725 (2000.0) P Q
n 0.74132808 Peri. 165.46814 +0.31574514 -0.94825489
a 1.2091005 Node 266.11756 +0.86716875 +0.30268817
e 0.1979394 Incl. 1.92025 +0.38512773 +0.09587769
P 1.33 H 25.5 G 0.15 U 6
Residuals in seconds of arc
210112 G96 0.3+ 0.1+ 210112 K63 0.7+ 0.3- 210113 W34 0.3- 0.5+
210112 G96 0.1+ 0.0 210112 595 0.4+ 0.3- 210113 I52 0.2- 0.2-
210112 G96 0.2+ 0.2+ 210112 595 0.0 0.4+ 210113 I52 0.8- 0.2-
210112 G96 0.1+ 0.1+ 210112 Z99 0.4+ 0.0 210113 I52 0.3- 0.1-
210112 I52 0.3- 0.0 210112 Z99 0.1- 0.2+ 210113 H36 0.2+ 0.3+
210112 I52 0.2+ 0.8- 210112 Z99 0.1+ 0.3+ 210113 H36 0.7+ 0.0
210112 I52 1.3- 0.6- 210112 L01 0.1+ 0.2+ 210113 H36 0.6+ 0.2-
210112 I52 0.3- 0.1+ 210112 L01 0.1- 0.1+ 210113 858 0.1+ 0.1+
210112 F52 0.0 0.1+ 210112 L01 0.2- 0.3+ 210113 858 0.5- 0.0
210112 F52 0.6+ 0.1+ 210112 L01 0.1+ 0.1+ 210113 858 0.1- 0.2-
210112 F52 0.2+ 0.1+ 210112 L01 0.1- 0.1+ 210113 F52 0.1+ 0.0
210112 104 0.1- 0.1- 210112 204 0.2- 0.2- 210113 F52 0.1+ 0.1-
210112 K63 0.8+ 0.8+ 210112 204 0.0 0.3+ 210113 F52 0.4- 0.1-
210112 104 0.1- 0.3- 210112 204 0.0 0.3+ 210113 K83 0.0 0.5-
210112 104 0.3+ 0.7- 210113 W34 0.2- 0.3- 210113 K83 0.1- 0.1-
210112 K63 0.6- 0.5+ 210113 W34 0.6- 0.3- 210113 K83 0.4+ 0.5+
Ephemeris:
2021 AR5 a,e,i = 1.21, 0.20, 2 q = 0.9698
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2020 12 14 22 29 29.5 -05 02 47 0.05789 0.9711 75.1 101.6 23.0
...
2020 12 29 00 42 19.1 -05 51 04 0.03235 0.9838 90.0 88.2 21.1
...
2021 01 06 03 09 30.8 -04 44 22 0.02812 0.9958 115.8 62.8 20.0
...
2021 01 12 04 55 51.3 -02 24 41 0.03309 1.0070 134.5 44.2 19.8
2021 01 13 05 10 01.4 -02 00 31 0.03450 1.0090 136.8 41.8 19.8
2021 01 14 05 23 06.6 -01 37 01 0.03604 1.0110 138.9 39.7 19.9
...
2021 01 20 06 22 25.3 +00 25 47 0.04742 1.0243 147.5 31.1 20.3
...
2021 01 28 07 08 20.4 +02 27 38 0.06647 1.0440 152.2 26.1 20.9
...
2021 02 12 07 52 58.3 +05 12 40 0.1108 1.0861 151.8 25.5 22.1
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-A171
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