2021 ST

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5333442000
Semi-major axis (a)2.0460943000 AU
Inclination (i)0.17347000°
Long. of Asc. Node (Ω)213.53419000°
Arg. of Perihelion (ω)192.21747000°
Mean Anomaly (M)138.59683000°
Mean Motion (n)0.3367562100°/day
Perihelion dist (q)0.95482180 AU
Aphelion dist (Q)3.13736680 AU
Orbital Period2.92676910 yr
Physical Parameters
H (abs. magnitude)25.99
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.660″
Uncertainty6
Orbit TypeApollo
MOID0.000907 AU
Observations Used91
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-10-07
Observations (95)
Date Type RA Dec Mag Band Observatory
2021-09-24 07:39:01 C 23 09 11.99 -03 46 52.8 V G96
2021-09-24 07:45:58 C 23 09 12.88 -03 46 44.5 V G96
2021-09-24 07:52:58 C 23 09 13.77 -03 46 36.0 V G96
2021-09-24 07:59:57 C 23 09 14.73 -03 46 27.4 V G96
2021-09-25 02:12:15 C 23 12 31.27 -03 19 55.7 V 807
2021-09-25 02:17:34 C 23 12 32.08 -03 19 48.3 V 807
2021-09-25 02:22:53 C 23 12 32.89 -03 19 40.8 V 807
2021-09-25 04:55:43 C 23 13 01.85 -03 18 32.5 V G96
2021-09-25 04:58:39 C 23 13 02.31 -03 18 28.7 V G96
2021-09-26 02:25:35 C 23 17 28.39 -02 42 07.4 u 807
2021-09-26 02:33:31 C 23 17 29.85 -02 41 53.4 u 807
2021-09-26 02:41:31 C 23 17 31.37 -02 41 39.9 u 807
2021-09-26 03:51:01 C 23 17 46.82 -02 42 40.9 u H21
2021-09-26 03:56:19 C 23 17 47.82 -02 42 31.7 u H21
2021-09-26 04:01:37 C 23 17 48.84 -02 42 22.5 u H21
2021-09-26 18:12:05 C 23 21 11.26 -02 16 10.7 V N51
2021-09-26 18:20:41 C 23 21 13.10 -02 15 53.2 V N51
2021-09-27 02:25:04 C 23 23 28.05 -01 59 44.5 X W34
2021-09-27 02:38:04 C 23 23 31.18 -01 59 18.4 X W34
2021-09-27 02:52:47 C 23 23 34.71 -01 58 47.7 X W34
2021-09-27 05:19:39 C 23 24 10.59 -01 53 47.4 u H21
2021-09-27 05:23:40 C 23 24 11.56 -01 53 38.8 u H21
2021-09-27 05:27:42 C 23 24 12.53 -01 53 30.3 u H21
2021-09-27 05:29:51 C 23 24 13.06 -01 53 25.9 u H21
2021-09-28 02:14:15 C 23 30 44.93 -01 00 59.0 u 807
2021-09-28 02:18:56 C 23 30 46.37 -01 00 44.8 u 807
2021-09-28 02:23:30 C 23 30 47.72 -01 00 33.0 u 807
2021-09-30 06:54:13 C 23 54 35.036 +01 56 11.95 U F51
2021-09-30 06:55:09 C 23 54 35.501 +01 56 15.58 U F51
2021-09-30 07:11:54 C 23 54 44.610 +01 57 31.69 U F51
2021-09-30 07:12:49 C 23 54 45.067 +01 57 35.37 U F51
2021-09-30 07:29:38 C 23 54 54.125 +01 58 51.21 U F51
2021-09-30 07:30:34 C 23 54 54.630 +01 58 55.42 U F51
2021-09-30 07:47:21 C 23 55 03.663 +02 00 11.38 U F51
2021-09-30 20:05:43 C 00 03 00.06 +02 58 09.0 V B67
2021-09-30 20:19:39 C 00 03 09.14 +02 59 21.8 V B67
2021-09-30 20:33:35 C 00 03 18.23 +03 00 34.7 V B67
2021-10-01 10:24:28 C 00 13 42.79 +04 21 32.2 V T08
2021-10-01 10:29:47 C 00 13 46.74 +04 22 04.8 V T08
2021-10-01 11:29:40 C 00 14 32.24 +04 28 17.0 V T08
2021-10-01 11:32:23 C 00 14 34.42 +04 28 34.6 V T08
2021-10-01 20:03:26 C 00 22 30.70 +05 22 59.6 q L47
2021-10-01 20:10:39 C 00 22 37.10 +05 23 50.8 q L47
2021-10-01 20:25:08 C 00 22 50.40 +05 25 32.5 V K83
2021-10-01 20:27:47 C 00 22 52.50 +05 25 52.0 q L47
2021-10-01 20:32:59 C 00 22 57.50 +05 26 28.4 V K83
2021-10-01 20:34:55 C 00 22 59.05 +05 26 43.1 q L47
2021-10-01 20:37:52 C 00 23 01.02 +05 26 53.6 V 595
2021-10-01 20:38:28 C 00 23 02.41 +05 27 06.8 V K83
2021-10-01 20:51:00 C 00 23 12.90 +05 28 26.9 V 595