2021 CP4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6800405324 ± 1.23e-04
Semi-major axis (a)1.9132440472 AU ± 4.93e-04
Inclination (i)4.72632025° ± 1.13e-03
Long. of Asc. Node (Ω)41.78732248° ± 9.48e-03
Arg. of Perihelion (ω)4.54593524° ± 6.28e-03
Mean Anomaly (M)315.07206012° ± 2.61e-01
Mean Motion (n)0.3724403448°/day ± 1.44e-04
Perihelion dist (q)0.61216055 AU ± 2.83e-04
Aphelion dist (Q)3.21432755 AU ± 8.61e-04
Orbital Period2.64640042 yr ± 1.02e-03
Physical Parameters
H (abs. magnitude)21.87
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.272″
Uncertainty3
Orbit TypeApollo
MOID0.081220 AU
Observations Used30
Oppositions1
Arc Total2021-2021
First Observation Used2021-02-07
Last Observation Used2021-03-06
Observations (32)
Date Type RA Dec Mag Band Observatory
2021-02-07 11:53:09 C 12 49 58.472 +14 50 39.68 U F51
2021-02-07 12:08:15 C 12 49 54.976 +14 50 53.68 U F51
2021-02-07 12:38:31 C 12 49 47.952 +14 51 21.75 U F51
2021-02-08 10:11:58 C 12 45 00.224 +15 10 36.43 V 568
2021-02-08 10:13:28 C 12 44 59.875 +15 10 37.83 V 568
2021-02-08 10:14:53 C 12 44 59.553 +15 10 39.07 V 568
2021-02-08 11:40:33 C 12 44 40.078 +15 11 55.45 V F52
2021-02-08 11:57:05 C 12 44 36.290 +15 12 10.14 V F52
2021-02-08 12:13:38 C 12 44 32.539 +15 12 24.42 V F52
2021-02-09 23:58:31 C 12 36 43.570 +15 42 19.51 V J04
2021-02-10 00:16:58 C 12 36 39.519 +15 42 34.71 V J04
2021-02-10 01:24:44 C 12 36 23.69 +15 43 23.2 V 033
2021-02-10 01:29:29 C 12 36 22.64 +15 43 26.7 V 033
2021-02-10 06:40:15 C 12 35 15.80 +15 48 11.0 u 807
2021-02-10 06:53:03 C 12 35 12.93 +15 48 22.2 u 807
2021-02-10 07:05:51 C 12 35 10.05 +15 48 32.1 u 807
2021-02-17 10:48:05 C 12 00 33.56 +17 38 33.7 V I52
2021-02-17 10:54:26 C 12 00 32.35 +17 38 37.4 V I52
2021-02-17 10:59:41 C 12 00 31.35 +17 38 40.2 V I52
2021-02-21 12:23:12 C 11 43 19.36 +18 19 16.3 V I52
2021-02-21 12:26:51 C 11 43 18.68 +18 19 18.0 V I52
2021-02-21 12:30:29 C 11 43 18.11 +18 19 19.1 V I52
2021-02-21 12:34:08 C 11 43 17.54 +18 19 19.9 V I52
2021-02-25 06:50:26 C 11 29 07.25 +18 44 31.1 V I52
2021-02-25 06:55:16 C 11 29 06.47 +18 44 33.5 V I52
2021-02-25 07:00:05 C 11 29 05.80 +18 44 35.1 V I52
2021-03-03 09:17:02 C 11 09 39.50 +19 04 15.8 V V06
2021-03-03 09:23:26 C 11 09 38.73 +19 04 16.1 V V06
2021-03-03 10:28:49 C 11 09 30.76 +19 04 19.4 V V06
2021-03-06 01:15:12 C 11 02 30.73 +19 06 08.0 V 033
2021-03-06 01:20:21 C 11 02 30.17 +19 06 07.8 V 033
2021-03-06 01:25:32 C 11 02 29.60 +19 06 07.7 V 033