IAA RAS IAA Minor Planet Database

2021 HG1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2996706480 ± 4.97e-05
Semi-major axis (a)0.9295457435 AU ± 7.42e-07
Inclination (i)10.53011564° ± 2.61e-03
Long. of Asc. Node (Ω)209.67692602° ± 2.63e-04
Arg. of Perihelion (ω)128.26052588° ± 2.33e-03
Mean Anomaly (M)307.16471648° ± 4.66e-03
Mean Motion (n)1.0997807820°/day ± 1.32e-06
Perihelion dist (q)0.65098817 AU ± 4.62e-05
Aphelion dist (Q)1.20810332 AU ± 4.62e-05
Orbital Period0.89620250 yr ± 1.07e-06
Physical Parameters
H (abs. magnitude)27.05
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.249″
Uncertainty1
Orbit TypeAten
MOID0.017012 AU
Observations Used56
Oppositions1
Arc Total2021-2021
First Observation Used2021-04-17
Last Observation Used2021-04-24
Observations (56)
Date Type RA Dec Mag Band Observatory
2021-04-17 11:29:51 C 15 01 02.189 -23 48 15.76 – U F51
2021-04-17 12:01:32 C 15 01 02.547 -23 44 30.37 – U F51
2021-04-17 12:17:23 C 15 01 02.743 -23 42 37.32 – U F51
2021-04-18 10:04:03 C 15 02 52.025 -20 47 00.99 – V F52
2021-04-18 10:18:56 C 15 02 52.384 -20 44 47.92 – V F52
2021-04-18 10:28:15 C 15 02 52.607 -20 43 23.73 – U F51
2021-04-18 10:48:51 C 15 02 53.070 -20 40 16.30 – V F52
2021-04-18 11:12:13 C 15 02 53.536 -20 36 42.87 – U F51
2021-04-18 12:26:42 C 15 02 54.781 -20 25 07.34 – V 568
2021-04-18 12:28:06 C 15 02 54.810 -20 24 53.93 – V 568
2021-04-18 12:29:32 C 15 02 54.839 -20 24 40.56 – V 568
2021-04-18 12:30:57 C 15 02 54.869 -20 24 27.18 – V 568
2021-04-19 08:09:45 C 15 04 51.45 -16 57 07.5 – V I52
2021-04-19 08:11:52 C 15 04 51.55 -16 56 42.3 – V I52
2021-04-19 08:14:00 C 15 04 51.59 -16 56 15.8 – V I52
2021-04-19 09:01:53 C 15 04 55.25 -16 46 46.7 – V 654
2021-04-19 09:41:43 C 15 04 56.82 -16 38 42.5 – V 654
2021-04-19 10:23:23 C 15 04 58.55 -16 30 10.1 – V 654
2021-04-20 09:52:03 C 15 07 47.06 -10 50 31.2 – V I52
2021-04-20 09:53:29 C 15 07 47.13 -10 50 07.4 – V I52
2021-04-20 09:54:55 C 15 07 47.21 -10 49 42.7 – V I52
2021-04-20 09:56:20 C 15 07 47.26 -10 49 18.2 – V I52
2021-04-20 23:23:18 C 15 09 57.06 -06 38 29.2 – V 033
2021-04-20 23:24:13 C 15 09 57.14 -06 38 10.5 – V 033
2021-04-20 23:25:08 C 15 09 57.24 -06 37 51.8 – V 033
2021-04-22 20:59:21 C 15 20 41.12 +15 49 46.2 – V 033
2021-04-22 20:59:52 C 15 20 41.27 +15 50 06.2 – V 033
2021-04-22 21:00:21 C 15 20 41.41 +15 50 26.1 – V 033
2021-04-22 21:00:51 C 15 20 41.55 +15 50 46.6 – V 033
2021-04-23 00:08:28 C 15 21 35.95 +17 59 21.8 – V J95
2021-04-23 00:13:02 C 15 21 37.20 +18 02 33.5 – V J95
2021-04-23 00:19:51 C 15 21 38.99 +18 07 18.8 – V J95
2021-04-23 00:24:18 C 15 21 40.21 +18 10 26.9 – V J95
2021-04-23 10:11:06 C 15 25 12.57 +25 25 44.2 – V I52
2021-04-23 10:12:49 C 15 25 13.10 +25 27 04.0 – V I52
2021-04-23 10:14:33 C 15 25 13.65 +25 28 23.5 – V I52
2021-04-23 20:00:58 C 15 30 35.58 +33 16 24.4 – V 033
2021-04-23 20:01:28 C 15 30 35.84 +33 16 49.7 – V 033
2021-04-23 20:01:58 C 15 30 36.09 +33 17 14.5 – V 033
2021-04-23 20:02:28 C 15 30 36.35 +33 17 39.8 – V 033
2021-04-24 02:42:47 C 15 33 54.04 +38 57 01.9 – V 033
2021-04-24 02:43:16 C 15 33 54.27 +38 57 26.1 – V 033
2021-04-24 02:43:47 C 15 33 54.56 +38 57 51.5 – V 033
2021-04-24 02:44:16 C 15 33 54.82 +38 58 16.6 – V 033
2021-04-24 02:44:45 C 15 33 55.10 +38 58 41.5 – V 033
2021-04-24 07:32:54 C 15 37 42.92 +43 08 42.8 – V I52
2021-04-24 07:39:04 C 15 37 46.48 +43 14 03.0 – V I52
2021-04-24 07:45:15 C 15 37 50.05 +43 19 23.3 – V I52
2021-04-24 07:51:26 C 15 37 53.58 +43 24 44.7 – V I52
2021-04-24 20:55:54 C 15 50 11.57 +54 24 00.2 – V 033