IAA RAS IAA Minor Planet Database

2021 TB4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6396691312 ± 5.80e-05
Semi-major axis (a)1.8464246561 AU ± 2.47e-04
Inclination (i)10.97340204° ± 9.08e-04
Long. of Asc. Node (Ω)187.15195807° ± 2.20e-04
Arg. of Perihelion (ω)97.92481704° ± 4.33e-04
Mean Anomaly (M)253.60046782° ± 1.24e-01
Mean Motion (n)0.3928392651°/day ± 7.87e-05
Perihelion dist (q)0.66532380 AU ± 1.39e-04
Aphelion dist (Q)3.02752551 AU ± 4.18e-04
Orbital Period2.50898108 yr ± 5.03e-04
Physical Parameters
H (abs. magnitude)24.77
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.237″
Uncertainty3
Orbit TypeApollo
MOID0.000196 AU
Observations Used48
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-03
Last Observation Used2021-10-30
Observations (50)
Date Type RA Dec Mag Band Observatory
2021-10-03 13:19:44 C 03 01 04.806 +02 51 12.35 – U F51
2021-10-03 13:54:00 C 03 00 41.800 +02 48 04.09 – U F51
2021-10-03 14:11:04 C 03 00 30.345 +02 46 30.01 – U F51
2021-10-04 13:30:11 C 02 47 08.676 +00 51 59.71 – U F51
2021-10-04 13:38:24 C 02 47 04.303 +00 51 24.11 – U F51
2021-10-04 13:46:34 C 02 46 59.825 +00 50 47.76 – U F51
2021-10-05 05:23:15 C 02 39 34.11 -00 11 43.6 – u 807
2021-10-05 05:32:07 C 02 39 29.90 -00 12 17.5 – u 807
2021-10-05 05:41:09 C 02 39 25.67 -00 12 52.5 – u 807
2021-10-06 14:16:08 C 02 26 32.030 -02 02 24.24 – V F51
2021-10-06 14:34:15 C 02 26 25.445 -02 03 16.38 – V F51
2021-10-06 22:47:27 C 02 23 46.28 -02 26 38.8 – X I93
2021-10-06 23:06:07 C 02 23 39.93 -02 27 28.6 – X I93
2021-10-06 23:25:04 C 02 23 33.52 -02 28 20.2 – X I93
2021-10-07 13:22:02 C 02 19 11.914 -03 03 17.67 – V T12
2021-10-07 13:22:46 C 02 19 11.684 -03 03 19.50 – V T12
2021-10-07 13:23:30 C 02 19 11.448 -03 03 21.29 – V T12
2021-10-07 13:26:10 C 02 19 10.625 -03 03 27.62 – V T12
2021-10-07 13:27:19 C 02 19 10.264 -03 03 30.37 – V T12
2021-10-07 13:29:49 C 02 19 09.486 -03 03 36.47 – V T12
2021-10-07 22:05:14 C 02 16 48.348 -03 23 52.62 – V Z84
2021-10-07 22:19:44 C 02 16 44.184 -03 24 25.48 – V Z84
2021-10-10 08:54:21 C 02 03 12.87 -05 11 16.4 – o 691
2021-10-10 09:17:44 C 02 03 07.99 -05 11 50.0 – o 691
2021-10-10 09:41:08 C 02 03 03.27 -05 12 25.6 – o 691
2021-10-11 05:20:16 C 01 59 33.65 -05 39 22.9 – V 291
2021-10-11 05:26:40 C 01 59 32.50 -05 39 31.3 – V 291
2021-10-11 05:33:06 C 01 59 31.33 -05 39 39.6 – V 291
2021-10-12 01:46:43 C 01 56 11.832 -06 04 00.75 – V Z84
2021-10-12 02:28:56 C 01 56 04.880 -06 04 48.03 – V Z84
2021-10-13 22:25:48 C 01 50 05.068 -06 47 35.17 – V Z84
2021-10-13 23:23:02 C 01 49 57.425 -06 48 23.60 – V Z84
2021-10-14 00:20:16 C 01 49 49.775 -06 49 11.81 – V Z84
2021-10-14 08:46:23 C 01 48 48.24 -06 55 59.4 – V 695
2021-10-14 08:52:50 C 01 48 47.43 -06 56 04.3 – V 695
2021-10-14 08:59:15 C 01 48 46.59 -06 56 09.3 – V 695
2021-10-15 21:58:04 C 01 44 48.726 -07 22 13.75 – V Z84
2021-10-15 23:38:16 C 01 44 37.834 -07 23 16.75 – V Z84
2021-10-17 06:47:51 C 01 41 44.65 -07 40 43.0 – V 695
2021-10-17 07:12:16 C 01 41 42.25 -07 40 55.4 – V 695
2021-10-17 07:36:41 C 01 41 39.95 -07 41 07.5 – V 695
2021-10-29 01:56:25 C 01 26 52.574 -08 35 49.86 – V 309
2021-10-29 02:01:52 C 01 26 52.380 -08 35 49.80 – V 309
2021-10-29 02:07:04 C 01 26 52.194 -08 35 49.66 – V 309
2021-10-29 04:49:24 C 01 26 46.518 -08 35 47.24 – V 309
2021-10-29 04:54:49 C 01 26 46.333 -08 35 47.05 – V 309
2021-10-29 05:00:00 C 01 26 46.150 -08 35 47.00 – V 309
2021-10-30 02:18:31 C 01 26 12.35 -08 35 09.0 – V W84
2021-10-30 02:46:15 C 01 26 11.48 -08 35 07.9 – V W84
2021-10-30 03:13:58 C 01 26 10.61 -08 35 07.0 – V W84