2021 TC21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4969636118 ± 1.11e-04
Semi-major axis (a)1.9862034234 AU ± 4.35e-04
Inclination (i)1.63203940° ± 2.72e-04
Long. of Asc. Node (Ω)209.28216982° ± 1.15e-04
Arg. of Perihelion (ω)157.93524663° ± 9.08e-04
Mean Anomaly (M)171.32785337° ± 1.75e-01
Mean Motion (n)0.3521086442°/day ± 1.16e-04
Perihelion dist (q)0.99913260 AU ± 3.10e-04
Aphelion dist (Q)2.97327425 AU ± 6.88e-04
Orbital Period2.79921070 yr ± 9.20e-04
Physical Parameters
H (abs. magnitude)26.48
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.443″
Uncertainty3
Orbit TypeApollo
MOID0.007037 AU
Observations Used109
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-15
Last Observation Used2021-10-18
Observations (112)
Date Type RA Dec Mag Band Observatory
2021-10-16 02:57:49 C 00 17 32.42 +16 29 47.7 X 858
2021-10-16 03:02:15 C 00 17 43.81 +16 30 23.7 X 858
2021-10-16 03:09:16 C 00 17 38.67 +16 30 18.8 V I22
2021-10-16 03:09:45 C 00 17 39.79 +16 30 23.1 V I22
2021-10-16 03:13:18 C 00 17 48.90 +16 30 50.0 V I22
2021-10-16 03:14:17 C 00 17 51.46 +16 30 57.1 V I22
2021-10-16 04:03:27 C 00 20 22.29 +16 38 46.2 V 703
2021-10-16 04:11:09 C 00 20 41.86 +16 39 46.8 V 703
2021-10-16 04:18:52 C 00 21 01.31 +16 40 45.9 V 703
2021-10-16 04:26:35 C 00 21 20.97 +16 41 47.4 V 703
2021-10-16 07:49:32 C 00 29 44.64 +17 05 49.7 V G96
2021-10-16 07:57:47 C 00 30 04.99 +17 06 43.7 V G96
2021-10-16 08:06:01 C 00 30 25.26 +17 07 36.9 V G96
2021-10-16 08:14:15 C 00 30 45.46 +17 08 29.9 V G96
2021-10-16 08:34:54 C 00 31 39.06 +17 09 28.3 17.7 r 718
2021-10-16 08:36:20 C 00 31 42.61 +17 09 36.3 17.7 r 718
2021-10-16 08:37:04 C 00 31 44.45 +17 09 40.5 17.7 r 718
2021-10-16 08:38:30 C 00 31 47.94 +17 09 51.0 17.7 r 718
2021-10-16 08:39:14 C 00 31 49.77 +17 09 55.0 17.8 r 718
2021-10-16 08:39:58 C 00 31 51.54 +17 10 00.0 17.9 r 718
2021-10-16 08:40:42 C 00 31 53.29 +17 10 04.5 17.8 r 718
2021-10-16 17:09:55 C 00 53 47.15 +17 58 16.7 o K88
2021-10-16 17:11:41 C 00 53 28.02 +18 00 22.7 V N88
2021-10-16 17:12:09 C 00 53 29.13 +18 00 25.5 V N88
2021-10-16 17:12:35 C 00 53 30.09 +18 00 27.8 V N88
2021-10-16 17:12:46 C 00 53 53.95 +17 58 32.6 o K88
2021-10-16 17:13:01 C 00 53 31.04 +18 00 29.6 V N88
2021-10-16 17:13:25 C 00 53 32.03 +18 00 32.1 V N88
2021-10-16 17:15:38 C 00 54 00.67 +17 58 49.4 o K88
2021-10-16 17:18:49 C 00 54 08.22 +17 59 06.8 o K88
2021-10-16 17:21:40 C 00 54 15.01 +17 59 22.7 o K88
2021-10-16 18:17:50 C 00 56 26.16 +18 04 20.5 V G02
2021-10-16 18:25:02 C 00 56 42.85 +18 04 59.8 V G02
2021-10-16 18:31:59 C 00 56 58.99 +18 05 36.4 V G02
2021-10-16 18:32:36 C 00 57 04.68 +18 06 05.6 V 104
2021-10-16 18:36:12 C 00 57 08.97 +18 06 12.5 V K88
2021-10-16 18:38:25 C 00 57 18.16 +18 06 38.1 V 104
2021-10-16 18:38:57 C 00 57 15.08 +18 06 14.4 V G02
2021-10-16 18:39:32 C 00 57 16.60 +18 06 29.5 V K88
2021-10-16 18:48:06 C 00 57 40.51 +18 07 29.7 V 104
2021-10-16 20:33:46 C 01 01 35.58 +18 16 11.1 V K88
2021-10-16 20:36:38 C 01 01 42.04 +18 16 24.9 V K88
2021-10-16 23:08:31 C 01 07 19.91 +18 28 23.3 V 160
2021-10-16 23:10:53 C 01 07 25.04 +18 28 32.8 V 160
2021-10-16 23:12:03 C 01 07 27.54 +18 28 37.8 V 160
2021-10-16 23:13:15 C 01 07 30.06 +18 28 42.8 V 160
2021-10-16 23:15:34 C 01 07 35.12 +18 28 52.2 V 160
2021-10-17 18:46:58 C 01 48 05.94 +19 25 38.2 o K88
2021-10-17 18:55:40 C 01 48 21.47 +19 25 57.6 o K88
2021-10-17 19:47:37 C 01 49 56.11 +19 26 58.8 V Z80