2021 SP4

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4051256888 ± 1.65e-08
Semi-major axis (a)1.4674746982 AU ± 4.34e-09
Inclination (i)9.91525585° ± 3.71e-06
Long. of Asc. Node (Ω)161.31670660° ± 2.55e-05
Arg. of Perihelion (ω)324.97450802° ± 2.47e-05
Mean Anomaly (M)53.56481644° ± 5.42e-06
Mean Motion (n)0.5544422830°/day ± 2.46e-09
Perihelion dist (q)0.87296300 AU ± 2.44e-08
Aphelion dist (Q)2.06198640 AU ± 2.50e-08
Orbital Period1.77768961 yr ± 7.89e-09
Physical Parameters
H (abs. magnitude)20.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.269″
Uncertainty0
Orbit TypeApollo
MOID0.047950 AU
Observations Used165
Oppositions7
Arc Total2005-2022
First Observation Used2005-09-28
Last Observation Used2022-06-04
Observations (167)
Date Type RA Dec Mag Band Observatory
2022-03-24 12:12:29 C 17 29 42.38 +00 08 10.4 V I52
2022-03-24 12:20:23 C 17 29 42.12 +00 08 18.9 V I52
2022-04-01 10:45:38 C 17 22 35.48 +03 46 58.4 o 691
2022-04-01 11:08:58 C 17 22 34.27 +03 47 23.6 o 691
2022-04-01 11:32:17 C 17 22 33.02 +03 47 48.6 o 691
2022-04-02 11:52:03 C 17 21 24.34 +04 13 30.0 o 691
2022-04-02 11:58:41 C 17 21 23.95 +04 13 36.9 o 691
2022-04-02 12:05:20 C 17 21 23.60 +04 13 44.4 o 691
2022-04-10 09:38:07 C 17 10 35.76 +07 15 20.3 o 291
2022-04-10 09:41:35 C 17 10 35.49 +07 15 23.9 o 291
2022-04-10 09:45:05 C 17 10 35.23 +07 15 26.5 o 291
2022-04-13 09:47:02 C 17 05 36.622 +08 15 06.37 V G96
2022-04-13 09:54:21 C 17 05 35.974 +08 15 11.99 V G96
2022-04-13 10:01:39 C 17 05 35.434 +08 15 17.06 V G96
2022-04-13 10:08:59 C 17 05 34.850 +08 15 23.11 V G96
2022-04-13 10:57:59 C 17 05 31.01 +08 16 02.5 o 291
2022-04-13 11:03:23 C 17 05 30.58 +08 16 06.7 o 291
2022-04-13 11:08:49 C 17 05 30.15 +08 16 11.0 o 291
2022-04-21 07:40:21 C 16 50 30.18 +10 24 09.7 o 691
2022-04-21 07:50:19 C 16 50 29.28 +10 24 14.3 o 691
2022-04-21 08:00:19 C 16 50 28.38 +10 24 20.4 o 691
2022-04-22 09:55:24 C 16 48 12.29 +10 38 30.6 o 691
2022-04-22 10:07:01 C 16 48 11.21 +10 38 38.0 o 691
2022-04-22 10:18:46 C 16 48 10.12 +10 38 43.6 o 691
2022-04-23 09:57:56 C 16 46 04.70 +10 50 53.1 o 691
2022-04-23 10:09:48 C 16 46 03.56 +10 50 59.3 o 691
2022-04-23 10:21:40 C 16 46 02.38 +10 51 04.8 o 691
2022-04-25 10:50:36 C 16 41 39.63 +11 13 38.4 o 691
2022-04-25 10:58:10 C 16 41 38.83 +11 13 40.3 o 691
2022-04-25 11:05:44 C 16 41 38.13 +11 13 44.6 o 691
2022-04-27 13:50:18 C 16 36 57.096 +11 33 56.65 U F52
2022-04-27 14:06:52 C 16 36 55.459 +11 34 02.41 U F52
2022-04-27 14:23:24 C 16 36 53.816 +11 34 08.41 U F52
2022-04-27 14:40:04 C 16 36 52.155 +11 34 14.08 U F52
2022-04-28 12:31:30 C 16 34 50.382 +11 41 47.18 V T12
2022-04-28 12:32:20 C 16 34 50.301 +11 41 47.46 V T12
2022-04-28 12:32:52 C 16 34 50.244 +11 41 47.63 V T12
2022-04-29 10:06:12 C 16 32 48.512 +11 48 28.33 V G96
2022-04-29 10:13:39 C 16 32 47.771 +11 48 30.42 V G96
2022-04-29 10:21:07 C 16 32 46.993 +11 48 32.83 V G96
2022-04-29 10:28:35 C 16 32 46.255 +11 48 35.21 V G96
2022-05-02 18:57:08 C 16 25 09.57 +12 07 55.6 V D29
2022-05-02 19:17:30 C 16 25 07.54 +12 07 59.5 V D29
2022-05-02 19:37:52 C 16 25 05.49 +12 08 03.0 V D29
2022-05-05 18:59:55 C 16 18 21.72 +12 17 24.5 V D29
2022-05-05 19:20:16 C 16 18 19.71 +12 17 25.8 V D29
2022-05-08 13:08:04 C 16 12 13.549 +12 19 48.89 U F52
2022-05-08 13:24:34 C 16 12 11.946 +12 19 48.51 U F52
2022-05-08 13:41:09 C 16 12 10.340 +12 19 48.21 U F52
2022-05-08 13:57:39 C 16 12 08.737 +12 19 47.88 U F52