2021 SN4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1769858270 ± 4.66e-07
Semi-major axis (a)1.3079719023 AU ± 3.75e-09
Inclination (i)16.35573640° ± 5.57e-05
Long. of Asc. Node (Ω)6.13939502° ± 8.67e-06
Arg. of Perihelion (ω)311.78646047° ± 1.87e-04
Mean Anomaly (M)311.02149214° ± 1.20e-04
Mean Motion (n)0.6588926367°/day ± 2.84e-09
Perihelion dist (q)1.07647941 AU ± 6.09e-07
Aphelion dist (Q)1.53946439 AU ± 6.09e-07
Orbital Period1.49588298 yr ± 6.44e-09
Physical Parameters
H (abs. magnitude)24.36
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.308″
Uncertainty0
Orbit TypeAmor
MOID0.117855 AU
Observations Used41
Oppositions1
Arc Total2021-2024
First Observation Used2021-09-30
Last Observation Used2024-10-03
Observations (41)
Date Type RA Dec Mag Band Observatory
2021-09-30 09:46:19 C 00 01 10.587 +00 42 21.50 U F52
2021-09-30 10:19:30 C 00 01 04.311 +00 44 50.74 U F52
2021-09-30 10:36:12 C 00 01 01.176 +00 46 05.37 U F52
2021-09-30 13:19:12 C 00 00 30.992 +00 58 15.23 V F51
2021-09-30 13:20:23 C 00 00 30.760 +00 58 20.45 V F51
2021-10-01 19:40:39 C 23 55 35.12 +03 10 03.5 V L01
2021-10-01 19:45:20 C 23 55 34.36 +03 10 23.3 V L01
2021-10-01 19:50:40 C 23 55 33.35 +03 10 46.2 V L01
2021-10-01 19:58:31 C 23 55 32.05 +03 11 19.6 V L01
2021-10-01 20:01:40 C 23 55 31.50 +03 11 33.7 V L01
2021-10-04 01:52:31 C 23 47 19.63 +06 49 27.3 u 807
2021-10-04 02:00:31 C 23 47 18.43 +06 49 58.0 u 807
2021-10-04 02:08:19 C 23 47 17.19 +06 50 28.6 u 807
2021-10-04 04:31:31 C 23 46 55.95 +06 58 24.6 V 734
2021-10-04 04:46:39 C 23 46 53.52 +06 59 21.5 V 734
2021-10-04 05:01:47 C 23 46 51.18 +07 00 19.5 V 734
2021-10-07 04:16:44 C 23 37 27.82 +11 10 15.6 V G96
2021-10-07 04:24:12 C 23 37 26.81 +11 10 39.5 V G96
2021-10-07 04:31:40 C 23 37 25.79 +11 11 04.3 V G96
2021-10-11 10:35:20 C 23 26 32.500 +16 04 01.40 U F51
2021-10-11 11:10:11 C 23 26 28.892 +16 05 28.38 U F51
2021-10-11 11:27:37 C 23 26 27.114 +16 06 11.78 U F51
2024-09-09 14:07:01 C 02 36 05.240 -21 51 50.61 V F52
2024-09-09 14:11:00 C 02 36 04.572 -21 51 36.65 V F52
2024-09-11 14:37:25 C 02 28 24.262 -18 53 44.72 V F52
2024-09-11 14:45:57 C 02 28 22.754 -18 53 12.77 V F52
2024-09-11 14:54:30 C 02 28 21.202 -18 52 39.57 V F52
2024-09-11 15:03:02 C 02 28 19.674 -18 52 06.90 V F52
2024-09-13 12:31:37 C 02 20 43.203 -15 53 50.94 V F52
2024-09-13 12:35:33 C 02 20 42.506 -15 53 35.56 V F52
2024-09-24 08:44:48 C 01 30 32.540 +03 15 27.86 V G96
2024-09-24 09:00:16 C 01 30 29.120 +03 16 37.27 V G96
2024-09-24 09:07:36 C 01 30 27.497 +03 17 10.14 V G96
2024-09-24 09:14:56 C 01 30 25.866 +03 17 42.32 V G96
2024-09-24 12:11:59 C 01 29 47.050 +03 30 51.60 V I52
2024-09-24 12:16:27 C 01 29 46.030 +03 31 11.60 V I52
2024-09-24 12:20:54 C 01 29 45.030 +03 31 30.40 V I52
2024-10-03 06:30:36 C 00 47 32.478 +17 26 44.27 V G96
2024-10-03 06:38:02 C 00 47 30.959 +17 27 09.61 V G96
2024-10-03 06:45:29 C 00 47 29.432 +17 27 34.45 V G96
2024-10-03 06:52:58 C 00 47 27.866 +17 27 59.65 V G96