MPEC 2021-A173 : 2021 AT5
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M.P.E.C. 2021-A173 Issued 2021 January 13, 20:37 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 AT5
Observations:
K21A05T* C2021 01 13.22303205 51 01.11 +47 14 55.8 17.40gUEA173I41
K21A05T C2021 01 13.22338005 51 05.22 +47 14 25.8 17.40gUEA173I41
K21A05T C2021 01 13.26184005 58 32.98 +46 17 07.9 16.84RUEA173I41
K21A05T C2021 01 13.26218805 58 36.93 +46 16 36.1 16.84RUEA173I41
K21A05T C2021 01 13.44191006 35 31.51 +40 57 57.1 16.4 GVEA173381
K21A05T C2021 01 13.44200206 35 32.58 +40 57 45.9 16.8 GVEA173381
K21A05T C2021 01 13.44296306 35 43.14 +40 56 01.1 VEA173381
K21A05T C2021 01 13.44305606 35 43.83 +40 55 49.3 16.7 GVEA173381
K21A05T C2021 01 13.51274306 47 51.78 +38 41 18.1 16.5 GVEA173381
K21A05T C2021 01 13.51281206 47 52.37 +38 41 10.0 16.5 GVEA173381
K21A05T C2021 01 13.51336806 47 57.93 +38 40 04.8 16.4 GVEA173381
K21A05T C2021 01 13.51342606 47 58.55 +38 39 56.7 16.6 GVEA173381
K21A05T C2021 01 13.52217606 49 26.85 +38 22 19.8 16.8 GVEA173381
K21A05T C2021 01 13.52223406 49 27.56 +38 22 11.4 16.8 GVEA173381
K21A05T C2021 01 13.53185206 51 03.81 +38 02 39.7 16.6 GVEA173381
K21A05T C2021 01 13.53192106 51 04.44 +38 02 32.2 16.5 GVEA173381
K21A05T C2021 01 13.55075206 54 10.76 +37 23 44.2 VEA173381
K21A05T C2021 01 13.55081006 54 11.60 +37 23 37.5 VEA173381
K21A05T C2021 01 13.55136606 54 16.70 +37 22 28.1 16.5 GVEA173381
K21A05T C2021 01 13.55141206 54 17.22 +37 22 22.4 VEA173381
K21A05T C2021 01 13.59531807 01 23.81 +35 49 45.9 16.7 VqEA173900
K21A05T C2021 01 13.59673007 01 37.18 +35 46 42.9 16.6 VqEA173900
K21A05T C2021 01 13.59814307 01 50.52 +35 43 40.2 16.6 VqEA173900
K21A05T KC2021 01 13.74326307 26 26.45 +30 06 42.9 16.7 GVEA173595
K21A05T KC2021 01 13.74516407 26 43.29 +30 02 29.7 16.7 GVEA173595
K21A05T KC2021 01 13.74707107 27 00.07 +29 58 16.4 16.7 GVEA173595
K21A05T KC2021 01 13.76918 07 30 17.72 +29 08 39.3 16.7 VqEA173C77
K21A05T KC2021 01 13.76991 07 30 23.92 +29 07 00.6 17.5 VqEA173C77
K21A05T KC2021 01 13.77072 07 30 30.93 +29 05 12.8 16.7 VqEA173C77
K21A05T KC2021 01 13.77152 07 30 37.80 +29 03 24.7 16.5 VqEA173C77
K21A05T KC2021 01 13.77233 07 30 44.86 +29 01 37.4 18.1 VqEA173C77
K21A05T KC2021 01 13.80023 07 34 38.28 +27 59 54.9 VEA173104
K21A05T KC2021 01 13.80311 07 35 02.12 +27 53 26.3 16.7 GVEA173104
K21A05T KC2021 01 13.80455 07 35 13.98 +27 50 12.6 16.7 GVEA173104
K21A05T KC2021 01 13.80725 07 35 36.13 +27 44 08.9 16.4 GVEA173104
K21A05T KC2021 01 13.81807107 37 04.66 +27 19 45.4 16.8 GVEA173K63
K21A05T KC2021 01 13.81818507 37 05.59 +27 19 29.6 17.2 GVEA173K63
K21A05T KC2021 01 13.81994407 37 19.82 +27 15 31.8 16.4 GVEA173K63
Observer details:
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri. Measurers
P. Bacci, L. Tesi, G. Fagioli. 0.60-m reflector + CCD.
381 Tokyo-Kiso. Observer J. Beniyama. 1.05-m f/3.1 Schmidt + CCD.
595 Farra d'Isonzo. Observer E. Pettarin. 0.40-m f/5.15 reflector + CCD.
900 Moriyama. Observer Y. Ikari. 0.26-m f/7.0 reflector + CCD.
C77 Bernezzo Observatory. Observer A. Mantero. 0.25-m f/4.0 reflector + CCD.
I41 Palomar Mountain--ZTF. Observers B. T. Bolin, V. Bhalerao, C. M.
Copperwheat, K. P. Deshmukh, C.-Y. Hsu, Z.-Y. Lin, J. Purdum, K. Sharma,
C. Zhai, Z. T. F. Collaboration. Measurers B. T. Bolin, D. A. Duev, H.-W.
Lin, F. J. Masci, Q.-Z. Ye. 1.2-m f/2.4 Schmidt.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci. 0.41-m
f/3.2 Newtonian reflector + CCD.
Orbital elements:
2021 AT5 Earth MOID = 0.0050 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 351.63538 (2000.0) P Q
n 0.40065146 Peri. 171.31712 -0.26186800 -0.95743720
a 1.8223211 Node 293.79132 +0.87730709 -0.18373178
e 0.4593408 Incl. 7.62448 +0.40219077 -0.22261319
P 2.46 H 27.5 G 0.15 U 6
Residuals in seconds of arc
210113 I41 0.6- 0.6+ 210113 381 0.9+ 1.2- 210113 C77 0.7+ 1.0+
210113 I41 0.3- 0.6+ 210113 381 0.6+ 0.4- 210113 C77 0.5- 0.2-
210113 I41 1.1+ 0.2- 210113 381 0.1- 0.5+ 210113 C77 0.0 0.2+
210113 I41 0.3+ 0.3+ 210113 381 0.4+ 0.7- 210113 C77 0.1- 1.0-
210113 381 0.1- 0.1- 210113 381 (3.7+ 0.1-) 210113 C77 1.2+ 0.0
210113 381 0.8+ 1.1- 210113 381 0.6- 0.2- 210113 104 0.5- 0.5+
210113 381 (3.2+ 1.1+) 210113 381 0.2+ 0.2- 210113 104 0.2+ 0.3-
210113 381 0.3- 0.4- 210113 900 0.3- 0.6+ 210113 104 0.2+ 0.0
210113 381 0.9+ 0.6- 210113 900 0.2- 0.1+ 210113 104 0.3- 0.2+
210113 381 0.4- 0.4- 210113 900 0.4- 0.3+ 210113 K63 0.4+ 0.0
210113 381 1.2- 1.2+ 210113 595 0.9- 0.7+ 210113 K63 0.5+ 0.4-
210113 381 0.9- 0.1+ 210113 595 0.2- 0.2+ 210113 K63 0.5+ 0.6-
210113 381 0.6- 0.2+ 210113 595 0.5- 0.5+
Ephemeris:
2021 AT5 a,e,i = 1.82, 0.46, 8 q = 0.9853
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2020 12 14 23 24 33.5 +40 44 07 0.1268 1.0238 104.7 68.5 25.5
...
2020 12 29 23 29 13.3 +41 49 11 0.06726 0.9907 94.4 81.7 24.5
...
2021 01 06 23 47 15.7 +44 36 30 0.03359 0.9853 92.5 85.6 23.1
...
2021 01 12 02 15 57.9 +55 21 25 0.0088990.9871 113.6 65.9 19.5
2021 01 13 05 03 14.0 +51 34 47 0.0058540.9879 137.6 42.2 18.0
2021 01 14 07 59 16.8 +20 41 07 0.0051900.9888 176.0 4.0 16.4
...
2021 01 20 10 38 36.0 -31 51 31 0.02777 0.9968 116.7 61.9 21.9
...
2021 01 28 10 55 58.0 -35 40 15 0.06190 1.0147 117.4 59.5 23.6
...
2021 02 12 10 57 41.6 -35 26 28 0.1254 1.0683 127.6 47.0 24.9
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-A173
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