2021 SK4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2244896969 ± 4.92e-05
Semi-major axis (a)1.3855162271 AU ± 1.09e-04
Inclination (i)6.86870232° ± 1.30e-03
Long. of Asc. Node (Ω)13.14023226° ± 2.94e-04
Arg. of Perihelion (ω)26.36011122° ± 1.14e-03
Mean Anomaly (M)172.85345175° ± 1.05e-01
Mean Motion (n)0.6043588015°/day ± 7.16e-05
Perihelion dist (q)1.07448211 AU ± 1.09e-04
Aphelion dist (Q)1.69655035 AU ± 1.50e-04
Orbital Period1.63086279 yr ± 1.93e-04
Physical Parameters
H (abs. magnitude)25.57
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.382″
Uncertainty3
Orbit TypeAmor
MOID0.086784 AU
Observations Used23
Oppositions1
Arc Total2021-2021
First Observation Used2021-09-28
Last Observation Used2021-11-05
Observations (23)
Date Type RA Dec Mag Band Observatory
2021-09-28 09:56:13 C 23 54 37.638 -12 18 23.12 U F51
2021-09-28 10:12:13 C 23 54 36.580 -12 17 47.51 U F51
2021-09-28 10:28:14 C 23 54 35.504 -12 17 12.00 U F51
2021-09-28 12:04:00 C 23 54 29.111 -12 13 35.44 V F51
2021-09-28 12:05:10 C 23 54 29.033 -12 13 32.59 V F51
2021-09-30 08:56:17 C 23 52 26.313 -10 29 11.82 U F51
2021-09-30 09:19:02 C 23 52 24.738 -10 28 17.17 U F51
2021-10-01 11:30:52 C 23 51 10.28 -09 22 19.6 V 474
2021-10-01 11:34:15 C 23 51 10.01 -09 22 11.1 V 474
2021-10-01 11:37:39 C 23 51 09.73 -09 22 02.5 V 474
2021-10-06 00:23:11 C 23 46 10.03 -04 27 51.5 W84
2021-10-06 01:22:37 C 23 46 06.39 -04 25 00.8 W84
2021-10-06 02:31:53 C 23 46 01.89 -04 21 39.9 W84
2021-10-06 03:16:31 C 23 45 58.96 -04 19 31.3 W84
2021-10-07 04:35:32 C 23 44 53.36 -03 06 35.3 V V06
2021-10-07 04:42:48 C 23 44 52.89 -03 06 13.2 V V06
2021-10-07 04:44:44 C 23 44 52.76 -03 06 07.6 V V06
2021-11-01 06:28:22 C 23 37 54.25 +28 46 23.6 o 291
2021-11-01 06:46:35 C 23 37 54.48 +28 47 12.5 o 291
2021-11-05 03:40:36 C 23 41 43.00 +32 47 24.4 V G96
2021-11-05 03:48:07 C 23 41 43.14 +32 47 42.5 V G96
2021-11-05 03:55:39 C 23 41 43.43 +32 48 00.3 V G96
2021-11-05 04:03:10 C 23 41 43.61 +32 48 18.1 V G96