2021 SL4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6077864739 ± 5.09e-04
Semi-major axis (a)2.8345542922 AU ± 3.92e-03
Inclination (i)2.84933421° ± 1.66e-03
Long. of Asc. Node (Ω)20.51713207° ± 1.08e-03
Arg. of Perihelion (ω)346.18151777° ± 1.79e-03
Mean Anomaly (M)311.90198243° ± 6.45e-01
Mean Motion (n)0.2065309328°/day ± 4.28e-04
Perihelion dist (q)1.11175053 AU ± 2.11e-03
Aphelion dist (Q)4.55735805 AU ± 6.47e-03
Orbital Period4.77229377 yr ± 9.90e-03
Physical Parameters
H (abs. magnitude)24.66
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.172″
Uncertainty3
Orbit TypeAmor
MOID0.109060 AU
Observations Used24
Oppositions1
Arc Total2021-2021
First Observation Used2021-09-29
Last Observation Used2021-10-31
Observations (24)
Date Type RA Dec Mag Band Observatory
2021-09-29 08:02:07 C 22 33 10.512 -17 26 33.03 U F51
2021-09-29 08:35:35 C 22 33 17.592 -17 25 14.31 U F51
2021-09-29 08:52:20 C 22 33 21.152 -17 24 34.21 U F51
2021-09-30 08:41:12 C 22 38 56.294 -16 27 08.29 U F51
2021-09-30 09:25:43 C 22 39 05.912 -16 25 18.71 U F51
2021-10-01 09:14:03 C 22 44 49.23 -15 24 26.4 V 474
2021-10-01 09:19:11 C 22 44 50.40 -15 24 13.5 V 474
2021-10-01 09:24:18 C 22 44 51.55 -15 24 00.5 V 474
2021-10-01 09:29:26 C 22 44 52.72 -15 23 47.4 V 474
2021-10-03 00:51:55 C 22 54 28.67 -13 41 03.8 V 807
2021-10-03 00:56:09 C 22 54 29.64 -13 40 52.8 V 807
2021-10-27 08:05:16 C 01 08 13.33 +11 38 42.8 V 291
2021-10-27 08:23:14 C 01 08 16.28 +11 39 14.6 V 291
2021-10-27 08:41:08 C 01 08 19.25 +11 39 46.7 V 291
2021-10-28 02:48:33 C 01 11 33.31 +12 11 43.8 o 691
2021-10-28 03:20:55 C 01 11 38.57 +12 12 40.6 o 691
2021-10-28 07:03:30 C 01 12 16.523 +12 19 15.13 U F52
2021-10-28 07:20:58 C 01 12 19.287 +12 19 45.31 U F52
2021-10-28 07:55:43 C 01 12 24.777 +12 20 45.57 U F52
2021-10-28 07:58:19 C 01 12 22.70 +12 20 38.6 V V06
2021-10-28 08:01:45 C 01 12 23.23 +12 20 44.8 V V06
2021-10-31 07:10:47 C 01 24 03.425 +14 13 51.50 U F52
2021-10-31 07:29:26 C 01 24 06.080 +14 14 19.16 U F52
2021-10-31 08:06:45 C 01 24 11.372 +14 15 14.26 U F52