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
2005-09-28 07:51:20 C 02 10 49.14 -03 15 44.0 n 645
2005-09-28 07:52:32 C 02 10 49.13 -03 15 45.2 n 645
2005-09-28 07:56:07 C 02 10 49.09 -03 15 49.8 n 645
2012-08-26 12:43:52 C 23 44 15.618 -02 31 20.72 V F51
2012-08-26 13:04:02 C 23 44 14.684 -02 31 33.47 V F51
2012-08-26 13:24:15 C 23 44 13.733 -02 31 46.54 V F51
2012-08-26 13:44:28 C 23 44 12.791 -02 31 59.01 V F51
2015-07-12 09:34:34 C 17 14 13.557 -04 47 07.92 V F51
2015-07-12 09:51:20 C 17 14 12.850 -04 47 14.54 V F51
2015-07-12 10:08:01 C 17 14 12.144 -04 47 21.68 V F51
2015-07-12 10:24:45 C 17 14 11.474 -04 47 28.32 V F51
2019-07-30 14:00:43 C 22 33 19.969 -02 50 39.70 V F52
2019-08-25 09:45:18 C 21 59 14.017 -08 05 33.37 V F52
2019-08-28 10:03:11 C 21 54 27.889 -08 50 43.08 V F51
2019-08-28 10:21:52 C 21 54 26.602 -08 50 54.69 V F51
2019-08-28 10:40:32 C 21 54 25.345 -08 51 06.17 V F51
2019-08-28 10:59:11 C 21 54 24.061 -08 51 17.85 V F51
2021-09-10 09:44:20 C 02 03 39.66 +02 52 46.7 V G96
2021-09-10 09:52:26 C 02 03 39.76 +02 52 42.5 V G96
2021-09-10 10:00:33 C 02 03 39.87 +02 52 37.9 V G96
2021-09-17 11:38:10 C 02 06 26.148 +00 48 43.67 V F51
2021-09-17 11:57:14 C 02 06 26.288 +00 48 28.27 V F51
2021-09-17 12:16:22 C 02 06 26.384 +00 48 12.39 V F51
2021-09-17 12:35:47 C 02 06 26.533 +00 47 56.28 V F51
2021-09-27 13:38:47 C 02 06 54.049 -03 09 42.55 V F51
2021-09-27 13:42:49 C 02 06 54.000 -03 09 47.10 V F51
2021-09-30 11:57:12 C 02 06 09.446 -04 33 41.88 U F52
2021-09-30 11:58:06 C 02 06 09.431 -04 33 43.01 U F52
2021-09-30 12:13:53 C 02 06 09.136 -04 34 02.46 U F52
2021-09-30 12:28:42 C 02 06 08.863 -04 34 21.01 U F52
2021-09-30 12:29:37 C 02 06 08.838 -04 34 22.16 U F52
2021-09-30 12:44:25 C 02 06 08.554 -04 34 40.59 U F52
2021-09-30 12:45:19 C 02 06 08.533 -04 34 41.61 U F52
2021-10-04 10:57:08 C 02 04 26.675 -06 37 47.82 U F52
2021-10-04 11:14:43 C 02 04 26.192 -06 38 12.02 U F52
2021-10-04 11:32:13 C 02 04 25.707 -06 38 36.03 U F52
2021-10-04 11:49:45 C 02 04 25.216 -06 38 59.90 U F52
2021-10-14 05:52:44 C 01 56 36.78 -12 31 36.9 V G96
2021-10-14 06:03:02 C 01 56 36.24 -12 31 53.4 V G96
2021-10-14 06:11:37 C 01 56 35.85 -12 32 07.5 V G96
2021-10-14 06:20:12 C 01 56 35.39 -12 32 21.6 V G96
2021-10-14 10:14:51 C 01 56 24.745 -12 38 39.46 U F52
2021-10-14 11:04:37 C 01 56 22.212 -12 40 00.47 U F52
2021-10-15 03:03:33 C 01 55 39.57 -13 05 46.1 u 807
2021-10-15 03:07:29 C 01 55 39.41 -13 05 53.4 u 807
2021-10-15 03:11:13 C 01 55 39.15 -13 05 59.2 u 807
2021-10-16 03:11:31 C 01 54 31.38 -13 45 32.0 u 807
2021-10-16 03:19:19 C 01 54 30.92 -13 45 46.0 u 807
2021-10-16 03:27:06 C 01 54 30.52 -13 45 58.1 u 807
2021-10-25 04:57:13 C 01 42 07.57 -19 55 18.6 u 807