MPEC 2021-H143 : A/2021 E2
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M.P.E.C. 2021-H143 Issued 2021 April 28, 04:43 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
A/2021 E2
Observations:
AK21E020* C2021 03 07.38616912 14 29.59 +04 20 38.4 21.19GVEH143G96
AK21E020 C2021 03 07.39131012 14 28.31 +04 20 49.0 20.91GVEH143G96
AK21E020 C2021 03 07.39646912 14 26.98 +04 21 00.3 21.27GVEH143G96
AK21E020 C2021 03 07.40163012 14 25.71 +04 21 11.6 21.68GVEH143G96
AK21E020 mC2021 03 07.49700112 14 01.83 +04 24 34.9 20.38GVEH143G96
AK21E020 mC2021 03 07.49798512 14 01.50 +04 24 37.4 20.89GVEH143G96
AK21E020 mC2021 03 07.49896912 14 01.26 +04 24 39.2 21.35GVEH143G96
AK21E020 mC2021 03 07.49995312 14 01.03 +04 24 42.4 21.48GVEH143G96
AK21E020 pC2021 03 08.04188012 11 45.72 +04 44 01.4 21.0 GVEH143L01
AK21E020 KC2021 03 08.04422212 11 45.14 +04 44 07.1 21.1 GVEH143L01
AK21E020 KC2021 03 08.04656412 11 44.58 +04 44 12.3 21.1 GVEH143L01
AK21E020 |C2021 03 08.30586 12 10 39.48 +04 53 33.7 21.4 VuEH143807
AK21E020 |C2021 03 08.30994 12 10 38.46 +04 53 42.6 20.8 VuEH143807
AK21E020 KC2021 03 08.31179612 10 38.12 +04 53 39.6 21.7 VuEH143H21
AK21E020 |C2021 03 08.31402 12 10 37.43 +04 53 51.5 21.2 VuEH143807
AK21E020 KC2021 03 08.32309012 10 35.27 +04 54 04.4 21.7 VuEH143H21
AK21E020 KC2021 03 08.32910112 10 33.75 +04 54 17.1 21.4 VuEH143H21
AK21E020 KC2021 03 08.52745712 09 44.09 +05 01 29.0 21.2 GVEH143474
AK21E020 KC2021 03 08.52981712 09 43.48 +05 01 34.1 20.6 GVEH143474
AK21E020 KC2021 03 08.53217612 09 42.93 +05 01 39.4 20.6 GVEH143474
AK21E020 KC2021 03 08.53453512 09 42.31 +05 01 44.6 20.9 GVEH143474
AK21E020 KC2021 03 09.20319612 06 54.32 +05 25 26.5 21.12GVEH143G96
AK21E020 KC2021 03 09.20493412 06 53.94 +05 25 31.2 20.46GVEH143G96
AK21E020 KC2021 03 09.20667112 06 53.46 +05 25 34.1 21.24GVEH143G96
AK21E020 |C2021 03 09.34549 12 06 18.20 +05 30 31.1 VEH143H06
AK21E020 |C2021 03 09.35202 12 06 16.55 +05 30 45.3 VEH143H06
AK21E020 |C2021 03 09.35856 12 06 14.89 +05 30 58.9 20.6 GVEH143H06
AK21E020 KC2021 03 09.97227712 03 40.31 +05 52 48.2 20.9 GVEH143954
AK21E020 KC2021 03 09.97571612 03 39.47 +05 52 54.8 20.8 GVEH143954
AK21E020 KC2021 03 09.97973712 03 38.43 +05 53 04.3 20.5 GVEH143954
AK21E020 KC2021 03 10.09301612 03 09.56 +05 57 05.2 21.3 GVEH143954
AK21E020 KC2021 03 10.09645612 03 08.64 +05 57 13.0 21.0 GVEH143954
AK21E020 KC2021 03 10.10047312 03 07.63 +05 57 21.6 20.6 GVEH143954
AK21E020 KC2021 03 10.21475312 02 38.55 +06 01 24.5 20.6 GVEH143954
AK21E020 KC2021 03 10.21715212 02 37.94 +06 01 28.9 21.2 GVEH143954
AK21E020 KC2021 03 10.21996612 02 37.24 +06 01 34.8 20.5 GVEH143954
AK21E020 KC2021 03 10.30191512 02 16.83 +06 04 29.2 20.56GVEH143I52
AK21E020 KC2021 03 10.30443612 02 16.20 +06 04 34.4 VEH143I52
AK21E020 KC2021 03 10.30695712 02 15.58 +06 04 39.9 20.30GVEH143I52
AK21E020 KC2021 03 10.30947712 02 14.90 +06 04 45.0 21.04GVEH143I52
AK21E020 pC2021 03 11.06127011 59 04.45 +06 31 19.3 21.6 GVEH143L01
AK21E020 pC2021 03 11.06332011 59 03.90 +06 31 22.7 21.5 GVEH143L01
AK21E020 pC2021 03 11.06548511 59 03.40 +06 31 27.1 21.6 GVEH143L01
AK21E020 KC2021 03 11.18085311 58 34.57 +06 35 33.8 21.3 VqEH143858
AK21E020 KC2021 03 11.19060011 58 32.08 +06 35 54.1 20.5 VqEH143858
AK21E020 KC2021 03 11.20031011 58 29.65 +06 36 14.5 20.5 VqEH143858
AK21E020 KC2021 03 11.28031311 58 09.21 +06 39 02.9 20.50GVEH143I52
AK21E020 KC2021 03 11.28199211 58 08.76 +06 39 06.9 21.09GVEH143I52
AK21E020 KC2021 03 15.28801 11 41 13.53 +08 57 39.5 oEH143711
AK21E020 KC2021 03 15.29153 11 41 13.52 +08 57 39.7 oEH143711
AK21E020 KC2021 03 15.29511 11 41 12.66 +08 57 46.6 oEH143711
AK21E020 KC2021 03 17.00764 11 34 02.79 +09 54 43.7 VEH143204
AK21E020 HC2021 03 17.05247 11 33 51.49 +09 56 11.8 21.2 GVEH143204
AK21E020 KC2021 03 17.86341211 30 29.88 +10 22 33.6 21.2 GVEH143J95
AK21E020 KC2021 03 17.94125911 30 10.48 +10 25 03.4 21.2 GVEH143J95
AK21E020 KC2021 03 18.26098 11 28 51.04 +10 35 24.5 oEH143711
AK21E020 KC2021 03 18.26448 11 28 50.17 +10 35 30.9 oEH143711
AK21E020 KC2021 03 18.26794 11 28 49.33 +10 35 37.4 oEH143711
AK21E020 C2021 03 19.32224211 24 29.51 +11 08 58.1 VEH143G96
AK21E020 C2021 03 19.32747011 24 28.25 +11 09 08.4 21.07GVEH143G96
AK21E020 C2021 03 19.33270711 24 26.93 +11 09 18.8 21.48GVEH143G96
AK21E020 C2021 03 19.33795411 24 25.64 +11 09 28.3 21.32GVEH143G96
AK21E020 KC2021 03 30.82650210 41 02.86 +16 17 42.2 21.3 GVEH143598
AK21E020 KC2021 03 30.84721510 40 58.63 +16 18 09.9 22.7 GVEH143598
AK21E020 KC2021 04 02.28462710 32 55.82 +17 09 32.9 21.56GVEH143V06
AK21E020 KC2021 04 02.29571810 32 54.70 +17 09 40.7 20.31GVEH143V06
AK21E020 KC2021 04 02.94611 10 30 49.74 +17 22 38.0 20.9 GVEH143587
AK21E020 KC2021 04 02.94820 10 30 49.32 +17 22 39.9 21.1 GVEH143587
Observer details:
204 Schiaparelli Observatory. Observer L. Buzzi. Measurers L. Buzzi, A.
Aletti. 0.84-m f/3.5 reflector + CCD.
474 Mount John Observatory, Lake Tekapo. Observers A. C. Gilmore, P. M.
Kilmartin. Measurer P. M. Kilmartin. 1.0-m f/7.7 reflector + CCD.
587 Sormano. Observers E. Colzani, E. Valli. Measurer P. Sicoli. 0.5-m
f/6.8 reflector + CCD.
598 Loiano. Observer A. Carbognani.
711 McDonald Observatory, Fort Davis. Observers J. G. Ries, J. W. Kuehne.
Measurer J. G. Ries. 2.1-m reflector + CCD + focal reducer.
807 Cerro Tololo Observatory, La Serena. Observers T. Linder, R. Holmes.
0.61-m f/6.5 astrograph + CCD.
858 Tebbutt Observatory, Edgewood. Observer F. B. Zoltowski. 0.51-m Schmidt-
Cassegrain + CCD.
954 Teide Observatory. Observers M. R. Alarcon, M. Serra-Ricart. Measurer M.
R. Alarcon. 0.82-m f/11.3 Cassegrain + CCD.
G96 Mt. Lemmon Survey. Observers G. J. Leonard, 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. 1.5-m reflector +
10K CCD.
H06 iTelescope Observatory, Mayhill. Observer H. Sato. 0.43-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes. 0.81-m f/4.0
astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer 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.
J95 Great Shefford. Observer P. Birtwhistle. 0.41-m f/6.3 Schmidt-Cassegrain
+ CCD.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
V06 Catalina Sky Survey-Kuiper. 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. 1.55-m reflector +
1K CCD.
Orbital elements:
A/2021 E2
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5
T 2020 Dec. 10.04160 TT Rudenko
q 2.2863173 (2000.0) P Q
z +0.0071617 Peri. 342.30413 -0.88028613 -0.47270330
+/-0.0018708 Node 190.79031 -0.40485494 +0.70380646
e 0.9836262 Incl. 167.47687 -0.24736372 +0.53029054
H 17.5
From 66 observations 2021 Mar. 7-Apr. 2, mean residual 0".5.
A/2021 E2
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5
T 2020 Dec. 10.04160 TT Rudenko
q 2.2863173 (2000.0) P Q
z +0.0071617 Peri. 342.30413 -0.88028613 -0.47270330
+/-0.0018708 Node 190.79031 -0.40485494 +0.70380646
e 0.9836262 Incl. 167.47687 -0.24736372 +0.53029054
H 17.5
From 66 observations 2021 Mar. 7-Apr. 2, mean residual 0".5.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2021 03 29 10 47 22.4 +15 35 59 1.6861 2.5893 148.3 11.7 21.4
...
2021 04 13 10 03 08.2 +20 02 22 1.9937 2.6698 122.5 18.5 22.1
...
2021 04 21 09 46 35.5 +21 25 40 2.1931 2.7154 110.6 20.3 22.4
...
2021 04 27 09 36 58.9 +22 09 34 2.3512 2.7508 102.5 20.9 22.6
2021 04 28 09 35 35.3 +22 15 38 2.3781 2.7568 101.2 21.0 22.6
2021 04 29 09 34 15.0 +22 21 24 2.4050 2.7628 99.9 21.0 22.6
...
2021 05 05 09 27 18.2 +22 50 09 2.5680 2.7994 92.5 21.1 22.8
...
2021 05 13 09 20 34.4 +23 15 55 2.7865 2.8494 83.2 20.6 23.0
...
2021 05 28 09 13 53.0 +23 38 52 3.1854 2.9469 67.3 18.5 23.3
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H143
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