IAA RAS IAA Minor Planet Database

2021 HE1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4208290557 ± 2.00e+00
Semi-major axis (a)1.4033739380 AU ± 3.00e+00
Inclination (i)8.19596569° ± 4.00e+00
Long. of Asc. Node (Ω)207.13898472° ± 5.00e+00
Arg. of Perihelion (ω)290.86019883° ± 6.00e+00
Mean Anomaly (M)304.76992010° ± 1.05e-01
Mean Motion (n)0.5928473100°/day ± 1.90e+00
Perihelion dist (q)0.81279370 AU ± 3.30e+00
Aphelion dist (Q)1.99395890 AU ± 5.10e+00
Orbital Period1.66249830 yr ± 5.33e+00
Physical Parameters
H (abs. magnitude)28.93
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.827″
Uncertainty3
Orbit TypeApollo
MOID0.000080 AU
Observations Used49
Oppositions1
Arc Total2021-2021
First Observation Used—
Last Observation Used2021-04-20
Observations (49)
Date Type RA Dec Mag Band Observatory
2021-04-18 04:24:00 C 13 50 36.39 +11 06 30.9 – V U68
2021-04-18 04:26:48 C 13 50 43.61 +11 06 10.8 – V U68
2021-04-18 04:28:53 C 13 50 48.95 +11 05 55.7 – V U68
2021-04-18 04:31:41 C 13 50 56.12 +11 05 35.8 – V U68
2021-04-18 07:54:25 C 13 57 55.75 +10 44 55.9 – V 703
2021-04-18 08:01:58 C 13 58 08.79 +10 44 09.0 – V 703
2021-04-18 08:09:32 C 13 58 22.16 +10 43 22.1 – V 703
2021-04-18 08:17:05 C 13 58 35.82 +10 42 33.6 – V 703
2021-04-18 09:12:09 C 14 00 08.13 +10 36 56.1 – V I52
2021-04-18 09:12:59 C 14 00 09.51 +10 36 51.3 – V I52
2021-04-18 09:13:49 C 14 00 10.86 +10 36 46.2 – V I52
2021-04-18 10:15:01 C 14 01 48.02 +10 30 45.6 – V I52
2021-04-18 10:15:51 C 14 01 49.32 +10 30 40.6 – V I52
2021-04-18 10:16:40 C 14 01 50.60 +10 30 36.0 – V I52
2021-04-18 11:17:19 C 14 03 22.87 +10 25 04.3 – V 291
2021-04-18 11:22:03 C 14 03 29.90 +10 24 38.6 – V 291
2021-04-18 11:26:50 C 14 03 36.97 +10 24 11.9 – V 291
2021-04-18 12:50:18 C 14 06 02.484 +10 21 48.11 – V F52
2021-04-18 12:51:15 C 14 06 03.720 +10 21 43.16 – V F52
2021-04-18 13:07:10 C 14 06 23.105 +10 20 23.91 – V F52
2021-04-18 13:23:02 C 14 06 42.280 +10 19 05.46 – V F52
2021-04-18 13:38:55 C 14 07 01.389 +10 17 47.33 – V F52
2021-04-18 21:43:13 C 14 16 55.72 +09 44 08.4 – V 204
2021-04-18 21:52:13 C 14 17 03.28 +09 42 16.9 – V Z99
2021-04-18 21:58:10 C 14 17 07.67 +09 42 02.7 – V Z99
2021-04-18 22:04:08 C 14 17 11.98 +09 41 48.0 – V Z99
2021-04-18 22:08:31 C 14 17 13.40 +09 43 05.9 – V 204
2021-04-18 23:43:30 C 14 18 13.09 +09 38 18.4 – V 033
2021-04-18 23:45:16 C 14 18 14.17 +09 38 14.2 – V 033
2021-04-18 23:47:00 C 14 18 15.26 +09 38 10.0 – V 033
2021-04-19 01:36:42 C 14 19 28.98 +09 33 45.6 – V J95
2021-04-19 01:43:18 C 14 19 32.82 +09 33 30.5 – V J95
2021-04-19 01:49:09 C 14 19 36.19 +09 33 17.2 – V J95
2021-04-19 01:55:14 C 14 19 39.68 +09 33 03.1 – V J95
2021-04-19 02:39:39 C 14 20 02.16 +09 32 26.2 – V I93
2021-04-19 02:45:31 C 14 20 05.30 +09 32 12.9 – V I93
2021-04-19 02:54:55 C 14 20 10.54 +09 31 50.3 – V I93
2021-04-19 04:11:14 C 14 21 51.25 +09 30 30.6 – q 858
2021-04-19 04:21:15 C 14 21 56.35 +09 30 13.9 – q 858
2021-04-19 06:05:29 C 14 22 47.67 +09 27 37.2 – V I52
2021-04-19 06:11:08 C 14 22 50.02 +09 27 27.7 – V I52
2021-04-19 06:22:25 C 14 22 54.78 +09 27 07.5 – V I52
2021-04-19 10:44:58 C 14 24 33.64 +09 19 19.7 – V 291
2021-04-19 10:51:22 C 14 24 36.03 +09 19 07.0 – V 291
2021-04-19 10:54:19 C 14 24 37.10 +09 19 02.5 – V 291
2021-04-20 09:01:17 C 14 32 16.08 +08 53 49.7 – V V06
2021-04-20 09:03:50 C 14 32 16.44 +08 53 47.5 – V V06
2021-04-20 09:06:24 C 14 32 16.75 +08 53 45.6 – V V06
2021-04-20 09:08:57 C 14 32 17.06 +08 53 43.2 – V V06