2021 TH4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3756611587 ± 1.24e-06
Semi-major axis (a)1.7954580356 AU ± 3.98e-06
Inclination (i)22.39180568° ± 3.16e-05
Long. of Asc. Node (Ω)71.25922404° ± 1.30e-05
Arg. of Perihelion (ω)29.30480275° ± 3.15e-05
Mean Anomaly (M)224.66386328° ± 1.93e-03
Mean Motion (n)0.4096843627°/day ± 1.36e-06
Perihelion dist (q)1.12097419 AU ± 3.33e-06
Aphelion dist (Q)2.46994188 AU ± 5.91e-06
Orbital Period2.40581866 yr ± 8.01e-06
Physical Parameters
H (abs. magnitude)19.94
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.260″
Uncertainty1
Orbit TypeAmor
MOID0.166172 AU
Observations Used117
Oppositions1
Arc Total2021-2022
First Observation Used2021-09-15
Last Observation Used2022-05-04
Observations (119)
Date Type RA Dec Mag Band Observatory
2021-09-15 14:01:07 C 04 36 44.901 -09 44 45.82 V F52
2021-09-15 14:17:47 C 04 36 46.356 -09 44 43.27 V F52
2021-09-15 14:51:06 C 04 36 49.201 -09 44 39.39 V F52
2021-09-19 14:41:53 C 04 45 21.419 -09 31 02.78 V F52
2021-10-02 14:25:21 C 05 13 15.187 -08 24 32.41 U F52
2021-10-02 14:54:42 C 05 13 17.709 -08 24 24.31 U F52
2021-10-02 15:09:19 C 05 13 18.986 -08 24 20.12 U F52
2021-10-03 11:43:27 C 05 15 10.853 -08 18 14.58 U F51
2021-10-03 11:54:40 C 05 15 11.832 -08 18 11.41 U F51
2021-10-03 12:04:48 C 05 15 12.736 -08 18 08.12 U F51
2021-10-03 12:14:51 C 05 15 13.591 -08 18 05.20 U F51
2021-10-05 13:32:02 C 05 19 40.367 -08 02 21.68 V F52
2021-10-05 13:49:42 C 05 19 41.920 -08 02 15.93 V F52
2021-10-27 07:39:02 C 06 09 02.00 -02 36 14.3 u 807
2021-10-27 07:50:57 C 06 09 03.16 -02 36 02.3 u 807
2021-10-27 08:02:41 C 06 09 04.26 -02 35 49.9 u 807
2021-10-27 10:53:29 C 06 09 21.60 -02 33 13.5 V V06
2021-10-27 10:58:03 C 06 09 22.05 -02 33 08.7 V V06
2021-10-27 11:02:38 C 06 09 22.49 -02 33 04.0 V V06
2021-10-30 11:27:37 C 06 16 51.83 -01 11 25.7 V I52
2021-10-30 11:31:42 C 06 16 52.26 -01 11 21.6 V I52
2021-10-30 11:38:04 C 06 16 52.89 -01 11 13.1 V I52
2021-11-08 23:46:44 C 06 42 32.28 +04 43 53.0 V B67
2021-11-09 00:16:18 C 06 42 35.70 +04 44 50.4 V B67
2021-11-09 00:45:50 C 06 42 39.24 +04 45 47.9 V B67
2021-11-09 01:15:23 C 06 42 42.67 +04 46 45.8 V B67
2021-11-09 01:44:55 C 06 42 46.15 +04 47 43.8 V B67
2021-11-09 07:09:49 C 06 43 25.75 +04 58 56.1 u 807
2021-11-09 07:13:48 C 06 43 26.19 +04 59 03.9 u 807
2021-11-09 07:17:49 C 06 43 26.68 +04 59 11.8 u 807
2021-11-12 09:28:32 C 06 52 47.10 +07 37 04.4 V I52
2021-11-12 09:33:09 C 06 52 47.70 +07 37 15.6 V I52
2021-11-12 09:37:05 C 06 52 48.18 +07 37 24.3 V I52
2021-11-12 09:41:39 C 06 52 48.71 +07 37 34.6 V I52
2021-11-18 03:13:58 C 07 11 58.67 +13 37 33.2 V 204
2021-11-18 03:27:19 C 07 12 00.57 +13 38 12.5 V 204
2021-11-18 03:40:36 C 07 12 02.47 +13 38 51.8 V 204
2021-11-18 20:18:51 C 07 14 33.62 +14 28 52.4 V D29
2021-11-18 20:28:33 C 07 14 35.01 +14 29 22.0 V D29
2021-11-18 20:38:15 C 07 14 36.46 +14 29 51.6 V D29
2021-11-20 00:57:08 C 07 19 02.02 +15 57 57.6 V 595
2021-11-20 01:14:25 C 07 19 04.65 +15 58 52.6 V 595
2021-11-20 01:23:04 C 07 19 05.97 +15 59 20.0 V 595
2021-11-27 08:43:43 C 07 50 19.58 +26 33 29.1 V 703
2021-11-27 08:51:31 C 07 50 20.99 +26 33 59.5 V 703
2021-11-27 08:59:20 C 07 50 22.55 +26 34 32.2 V 703
2021-11-27 09:07:08 C 07 50 24.00 +26 35 03.4 V 703
2021-11-27 12:46:05 C 07 51 05.96 +26 49 41.3 o 691
2021-11-27 12:52:21 C 07 51 07.15 +26 50 06.4 o 691
2021-11-27 12:58:37 C 07 51 08.37 +26 50 31.2 o 691