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
2022-05-11 07:34:06 C 16 06 14.803 +12 16 11.46 V G96
2022-05-11 07:41:29 C 16 06 14.008 +12 16 11.28 V G96
2022-05-11 07:48:51 C 16 06 13.385 +12 16 10.27 V G96
2022-05-11 07:56:13 C 16 06 12.719 +12 16 09.73 V G96
2022-05-19 10:36:24 C 15 50 10.15 +11 35 17.3 o 691
2022-05-19 10:53:36 C 15 50 08.80 +11 35 12.1 o 691
2022-05-26 08:03:08 C 15 38 54.406 +10 31 31.48 V G96
2022-05-26 08:10:42 C 15 38 53.938 +10 31 27.62 V G96
2022-05-26 08:18:17 C 15 38 53.444 +10 31 24.42 V G96
2022-05-26 08:25:49 C 15 38 53.005 +10 31 21.61 V G96
2022-05-30 10:54:32 C 15 33 22.168 +09 43 48.14 U F52
2022-05-30 11:11:57 C 15 33 21.206 +09 43 39.21 U F52
2022-05-30 11:29:30 C 15 33 20.233 +09 43 30.12 U F52
2022-05-30 11:46:52 C 15 33 19.284 +09 43 21.13 U F52
2022-06-04 10:27:08 C 15 27 55.800 +08 38 53.97 U F52
2022-06-04 10:43:38 C 15 27 55.085 +08 38 44.53 U F52
2022-06-04 11:00:09 C 15 27 54.372 +08 38 35.10 U F52