MPEC 2022-L28 : 2020 DA4
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M.P.E.C. 2022-L28 Issued 2022 June 4, 13:07 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
2020 DA4
Revision to MPEC 2020-D131
Additional Observations:
K20D04A HC2022 06 03.40585617 55 39.310+41 14 51.90 14.75GVEL028G96
K20D04A HC2022 06 03.41112217 55 43.930+41 09 34.20 VEL028G96
K20D04A HC2022 06 03.41638717 55 48.620+41 04 17.70 VEL028G96
K20D04A HC2022 06 03.42165717 55 53.180+40 59 00.20 VEL028G96
K20D04A mC2022 06 03.43746617 56 07.091+40 43 04.98 18.43GVEL028I52
K20D04A mC2022 06 03.43759617 56 07.202+40 42 57.20 18.52GVEL028I52
K20D04A mC2022 06 03.43772617 56 07.314+40 42 49.43 18.10GVEL028I52
K20D04A mC2022 06 03.46194617 56 28.633+40 18 32.47 18.46GVEL028I52
K20D04A mC2022 06 03.46207617 56 28.752+40 18 24.73 18.06GVEL028I52
K20D04A mC2022 06 03.46220517 56 28.856+40 18 16.99 18.54GVEL028I52
K20D04A mC2022 06 03.46233517 56 28.972+40 18 09.32 18.48GVEL028I52
K20D04A C2022 06 03.57340 17 59 12.04 +38 30 35.0 18.7 RrEL028P93
K20D04A C2022 06 03.57507 17 59 13.36 +38 29 01.7 18.6 RrEL028P93
K20D04A C2022 06 03.57675 17 59 14.67 +38 27 27.6 18.4 RrEL028P93
K20D04A C2022 06 03.58009 17 59 17.37 +38 24 22.0 18.5 RrEL028P93
K20D04A KC2022 06 03.60620617 59 35.68 +38 00 07.4 18.5 GVEL028900
K20D04A KC2022 06 03.61147917 59 39.54 +37 55 15.1 18.6 GVEL028900
K20D04A KC2022 06 03.61675217 59 43.40 +37 50 19.8 18.5 GVEL028900
K20D04A KC2022 06 03.84753 18 03 20.59 +34 19 45.0 18.4 GVEL028K96
K20D04A KC2022 06 03.85032 18 03 22.42 +34 17 23.0 19.5 GVEL028K96
K20D04A KC2022 06 03.85303 18 03 24.34 +34 15 04.2 18.3 GVEL028K96
K20D04A KC2022 06 03.89424218 03 52.05 +33 39 07.8 18.5 GVEL028203
K20D04A KC2022 06 03.90073218 03 56.26 +33 33 41.4 18.4 GVEL028203
K20D04A KC2022 06 03.90531518 03 59.18 +33 29 51.1 18.5 GVEL028203
K20D04A KC2022 06 03.91259318 04 03.82 +33 23 45.5 18.3 GVEL028203
K20D04A KC2022 06 03.99314818 04 51.64 +32 16 52.0 18.8 GVEL028204
K20D04A KC2022 06 04.00042318 04 55.73 +32 10 53.6 VEL028204
K20D04A KC2022 06 04.18686 18 07 20.87 +29 41 50.0 18.4 RqEL028H36
K20D04A KC2022 06 04.19050 18 07 22.73 +29 39 04.1 18.6 RqEL028H36
K20D04A KC2022 06 04.19415 18 07 24.60 +29 36 18.8 18.6 RqEL028H36
K20D04A KC2022 06 04.24656618 07 46.24 +28 56 54.8 18.2 VuEL028H21
K20D04A KC2022 06 04.24780218 07 46.81 +28 55 59.0 18.6 VuEL028H21
K20D04A KC2022 06 04.24903818 07 47.35 +28 55 03.3 18.5 VuEL028H21
K20D04A KC2022 06 04.25027418 07 47.90 +28 54 07.6 18.2 VuEL028H21
K20D04A mC2022 06 04.26483418 08 06.274+28 43 40.08 18.72GVEL028I52
K20D04A mC2022 06 04.26499918 08 06.346+28 43 32.74 18.02GVEL028I52
K20D04A mC2022 06 04.26516318 08 06.428+28 43 25.43 18.39GVEL028I52
K20D04A mC2022 06 04.26532618 08 06.493+28 43 18.26 18.43GVEL028I52
K20D04A C2022 06 04.33925818 08 41.372+27 48 36.55 18.0 GVEL028654
K20D04A C2022 06 04.34126418 08 42.052+27 47 08.95 18.0 GVEL028654
K20D04A C2022 06 04.36044918 08 49.746+27 33 13.45 18.4 GVEL028654
K20D04A C2022 06 04.36162718 08 50.242+27 32 22.43 18.4 GVEL028654
Observer details:
203 GiaGa Observatory. Observers S. Foglia, G. Galli. Measurer G. Galli.
0.36-m f/5.76 Schmidt-Cassegrain + CCD.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector +
CCD.
654 Table Mountain Observatory, Wrightwood-PHMC. Observers N. Evans, P. Choi,
N. Saini, C. Zhai, R. Trahan, M. Shao. 1.0-m Reflector + CCD.
900 Moriyama. Observer Y. Ikari. 0.26-mf/7.0 reflector + CCD.
G96 Mt. Lemmon Survey. Observer R. A. Kowalski. Measurers E. J. Christensen,
D. Fay, J. B. Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller,
J. K. Hogan, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
Seaman, A. Serrano, F. C. Shelly, K. W. Wierzchos. 1.5-m reflector + 10K
CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers T. Linder, R. Holmes, L. Horn. 0.76-m f/3.0 astrograph + CCD.
H36 Sandlot Observatory, Scranton. Observer G. Hug. .56 meter Reflector +
CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observers D. Rankin, G. J.
Leonard. Measurers E. J. Christensen, D. Fay, J. B. Fazekas, D. C. Fuls,
A. R. Gibbs, A. D. Grauer, H. Groeller, J. K. Hogan, R. A. Kowalski, S. M.
Larson, G. J. Leonard, D. Rankin, R. L. Seaman, A. Serrano, F. C. Shelly,
K. W. Wierzchos. 1.0-m prime focus + CCD.
K96 Savelli Observatory. Observers A. Brosio, A. De Pieri. Measurer A. De
Pieri. 0.50-m f/2.2 RC + CCD.
P93 Space Tracking and Communications Center, JAXA. Observers S. Urakawa, T.
Nimura. 1.0-m f/3.0 reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
220603 G96 20- 17- 220604 654 19- 11- E2020-E12 -0.52 days
Orbital elements:
2020 DA4 Earth MOID = 0.0053 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5 Veres
M 314.48159 (2000.0) P Q
n 0.47950413 Peri. 19.82467 -0.90835426 +0.41819954
a 1.6166195 Node 184.89688 -0.38570967 -0.83897286
e 0.4312717 Incl. 0.86913 -0.16161863 -0.34818627
P 2.06 H 25.61 G 0.15 U 0
Residuals in seconds of arc
200227 G96 0.0 0.1+ 200228 I52 0.2- 0.1+ 200302 474 0.4- 0.2-
200227 G96 0.1+ 0.1+ 200228 I52 0.1- 0.2+ 200302 474 0.2- 0.2-
200227 G96 0.0 0.1+ 200228 I52 (1.4- 0.8-) 200302 474 0.1+ 0.6-
200227 G96 0.0 0.1+ 200228 H36 0.2+ 0.3- 200302 474 0.2+ 0.0
200227 711 0.5- 0.6- 200228 H36 0.1- 0.4- 200303 474 0.4+ 0.0
200227 711 0.6- 0.2- 200228 H36 0.0 0.2+ 200303 474 0.0 0.0
200227 711 0.6- 0.5- 200228 H36 0.2+ 0.1+ 200303 474 0.2- 0.3+
200227 673 0.0 0.2+ 200228 734 0.0 0.1- 200303 474 0.2+ 0.1+
200227 673 0.0 0.0 200228 734 0.1+ 0.2- 200304 474 1.6- 0.3+
200227 I52 0.5- 0.1+ 200228 734 0.0 0.8- 200304 474 0.4+ 0.3-
200227 I52 0.0 0.1+ 200228 734 0.0 0.4- 200304 474 1.2+ 0.0
200227 I52 0.0 0.1- 200228 658 0.5- 0.6- 200304 474 0.4- 1.2+
200227 I52 0.2- 0.1- 200228 658 0.5- 0.9- 200304 474 1.4+ 0.5+
200227 E23 0.8- 0.9+ 200228 658 0.4- 0.7- 200304 474 0.3- 0.9+
200227 E23 0.1- 0.1+ 200228 658 0.2- 0.6- 200304 474 0.2- 0.7+
200227 E23 0.1- 0.1+ 200228 658 0.3- 0.6- 200304 474 0.4+ 0.2-
200227 L04 0.0 0.1- 200228 L34 0.3+ 0.3- 220603 G96 (0.0 1.0-)
200227 L04 0.0 0.7- 200228 L34 0.2+ 0.7+ 220603 G96 0.1- 0.4-
200227 L04 0.0 0.5- 200228 L34 0.4+ 0.5+ 220603 G96 0.6+ 1.2+
200227 Z84 0.1- 0.2+ 200228 L34 0.2- 0.2+ 220603 G96 (0.2- 1.9+)
200227 Z84 0.4- 0.2+ 200228 C43 0.3+ 0.3+ 220603 I52 0.2+ 0.1+
200227 J04 0.1- 0.4+ 200228 C43 0.3+ 0.0 220603 I52 0.1+ 0.1+
200227 J04 0.3+ 0.4- 200228 C43 0.0 0.1- 220603 I52 0.1+ 0.1+
200227 J04 0.4- 0.0 200228 C43 0.1+ 0.3+ 220603 I52 0.1+ 0.0
200227 Z84 0.1- 0.5+ 200228 C43 0.1+ 0.3- 220603 I52 0.1+ 0.1+
200227 J95 0.2- 0.2+ 200228 K96 0.3- 0.6- 220603 I52 0.0 0.1+
200227 J95 0.3- 0.3- 200228 K96 0.2+ 0.4- 220603 I52 0.0 0.2+
200227 J95 0.2- 0.1- 200228 K96 0.2+ 0.1+ 220603 P93 0.1- 0.6-
200227 I93 0.1- 0.0 200228 159 0.2+ 0.1+ 220603 P93 0.1- 0.6-
200227 I93 0.1+ 0.2- 200228 595 0.1+ 0.1- 220603 P93 0.2- 0.9-
200227 I93 0.1+ 0.0 200228 159 0.1+ 0.4- 220603 P93 0.8+ 0.0
200227 Z80 0.8+ 0.1- 200228 595 0.2+ 0.0 220603 900 0.4+ 0.7-
200227 Z99 0.5- 0.3- 200228 159 0.5- 0.2+ 220603 900 0.0 0.6+
200227 Z80 0.4+ 0.1+ 200228 K63 0.2+ 0.1- 220603 900 0.1- 1.3-
200227 Z99 0.5- 0.2+ 200228 595 0.1- 0.4+ 220603 K96 0.2+ 0.1-
200227 Z99 0.1+ 0.0 200228 K63 0.1- 0.6+ 220603 K96 0.8- 0.0
200227 J69 0.2+ 0.0 200228 L01 0.2- 0.2+ 220603 K96 0.0 0.9-
200227 Z80 0.1+ 0.3+ 200228 L01 0.0 0.2- 220603 203 0.4+ 0.4-
200227 J69 0.0 0.3- 200228 K63 0.2- 0.1+ 220603 203 0.2+ 0.0
200227 J69 0.3- 0.7+ 200228 L01 0.2- 0.1+ 220603 203 0.2- 0.2+
200227 X31 0.1+ 0.1- 200228 L01 0.4- 0.4+ 220603 203 0.1- 0.2+
200227 X31 0.2- 0.5+ 200228 160 0.4+ 0.7+ 220603 204 0.3+ 0.2+
200227 X31 0.7- 0.3- 200228 160 0.9- 0.3+ 220604 204 (0.6+ 0.9+)
200228 204 0.1+ 0.6- 200228 160 0.0 0.3+ 220604 H36 0.2+ 0.1+
200228 204 0.2- 0.1- 200228 203 0.1- 0.1- 220604 H36 0.1- 0.2-
200228 W34 1.0+ 0.5- 200228 160 0.3- 0.4+ 220604 H36 0.1- 0.4+
200228 W34 0.0 0.4- 200228 958 0.9+ 0.1- 220604 H21 0.0 0.2-
200228 W34 0.2- 0.6- 200228 160 0.8+ 0.9+ 220604 H21 0.1+ 0.3-
200228 W34 0.2+ 0.0 200228 J04 0.0 0.0 220604 H21 0.2- 0.3-
200228 W34 0.3- 0.6- 200228 J04 0.2+ 0.1- 220604 H21 0.3- 0.3-
200228 C95 0.1- 1.1- 200228 J04 0.1- 0.2+ 220604 I52 0.0 0.0
200228 C95 0.7- 1.0- 200228 203 0.1+ 0.0 220604 I52 0.0 0.0
200228 W34 0.5+ 0.6- 200228 958 0.0 0.3- 220604 I52 0.1+ 0.0
200228 807 0.0 0.1+ 200228 203 0.0 0.1- 220604 I52 0.0 0.1+
200228 807 0.1+ 0.1+ 200228 958 0.3+ 0.2- 220604 654 (1.9+ 0.2-)
200228 W34 0.3+ 0.4- 200302 474 0.5- 0.2+ 220604 654 0.0 0.2-
200228 807 0.1- 0.2- 200302 474 0.1- 0.2+ 220604 654 0.6- 0.0
200228 I52 0.5+ 0.2+ 200302 474 0.3- 0.7+ 220604 654 0.2- 0.1+
Ephemeris:
2020 DA4 a,e,i = 1.62, 0.43, 1 q = 0.9194
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2022 05 05 06 31 00.3 +26 04 36 0.1498 0.9256 52.8 119.8 26.1
...
2022 05 20 06 48 01.2 +32 20 29 0.06968 0.9615 42.4 134.8 26.0
...
2022 05 28 07 08 52.5 +48 40 32 0.02978 0.9919 43.5 135.3 24.2
...
2022 06 03 17 46 46.7 +48 20 33 0.01492 1.0190 108.0 71.2 19.0
2022 06 04 18 04 50.0 +32 13 54 0.01735 1.0238 122.3 56.9 18.9
2022 06 05 18 13 59.7 +20 40 25 0.02083 1.0287 132.3 46.8 19.0
...
2022 06 11 18 30 09.2 -04 58 52 0.04887 1.0596 154.5 24.4 20.3
...
2022 06 19 18 33 35.5 -12 57 38 0.09106 1.1043 165.1 13.7 21.4
...
2022 07 04 18 33 14.0 -17 42 26 0.1797 1.1954 173.3 5.7 22.7
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