2021 AP4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4491148000
Semi-major axis (a)1.1740052000 AU
Inclination (i)21.52988000°
Long. of Asc. Node (Ω)310.44662000°
Arg. of Perihelion (ω)291.70890000°
Mean Anomaly (M)215.76548000°
Mean Motion (n)0.7748167900°/day
Perihelion dist (q)0.64674210 AU
Aphelion dist (Q)1.70126830 AU
Orbital Period1.27205250 yr
Physical Parameters
H (abs. magnitude)22.57
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.960″
Uncertainty8
Orbit TypeApollo
MOID0.078223 AU
Observations Used23
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-01-14
Observations (34)
Date Type RA Dec Mag Band Observatory
2021-01-08 12:37:12 C 09 09 45.123 +41 58 21.77 U F51
2021-01-08 12:53:13 C 09 09 42.857 +41 58 21.86 U F51
2021-01-08 13:09:12 C 09 09 40.502 +41 58 21.65 U F51
2021-01-08 13:25:12 C 09 09 38.186 +41 58 21.55 U F51
2021-01-09 08:10:45 C 09 07 02.14 +41 58 08.6 V V06
2021-01-09 08:15:18 C 09 07 01.47 +41 58 08.7 V V06
2021-01-09 08:19:52 C 09 07 00.81 +41 58 08.8 V V06
2021-01-09 08:24:25 C 09 07 00.15 +41 58 08.5 V V06
2021-01-09 09:29:23 C 09 06 50.07 +41 58 08.9 o 711
2021-01-09 09:35:42 C 09 06 49.07 +41 58 08.3 o 711
2021-01-10 06:15:06 C 09 03 47.01 +41 57 14.7 V V06
2021-01-10 06:19:39 C 09 03 46.24 +41 57 14.6 V V06
2021-01-10 06:24:13 C 09 03 45.57 +41 57 14.7 V V06
2021-01-10 06:28:47 C 09 03 44.82 +41 57 14.4 V V06
2021-01-11 06:34:38 C 08 59 56.53 +41 55 20.9 V V06
2021-01-11 06:39:12 C 08 59 55.71 +41 55 20.4 V V06
2021-01-11 06:43:46 C 08 59 55.00 +41 55 20.3 V V06
2021-01-12 11:03:02 C 08 55 06.259 +41 51 45.16 U F51
2021-01-12 11:19:26 C 08 55 03.206 +41 51 42.74 U F51
2021-01-12 11:35:52 C 08 55 00.169 +41 51 40.21 U F51
2021-01-14 07:02:14 C 08 46 55.46 +41 42 06.4 V G96
2021-01-14 07:10:41 C 08 46 53.72 +41 42 04.3 V G96
2021-01-14 07:19:07 C 08 46 51.96 +41 42 02.4 V G96
2021-01-14 07:27:34 C 08 46 50.29 +41 42 00.0 V G96
2021-01-31 02:36:54 C 06 51 32.82 +32 46 48.1 V I52
2021-01-31 02:41:39 C 06 51 31.13 +32 46 34.7 V I52
2021-01-31 02:53:32 C 06 51 26.88 +32 46 01.6 V I52
2021-02-11 02:04:01 C 05 24 12.62 +16 08 31.3 V I52
2021-02-11 02:07:09 C 05 24 11.64 +16 08 17.3 V I52
2021-02-11 02:10:17 C 05 24 10.70 +16 08 03.1 V I52
2021-02-11 02:13:25 C 05 24 09.72 +16 07 49.7 V I52
2021-02-21 02:57:23 C 04 22 59.49 -01 00 43.9 V I52
2021-02-21 03:04:38 C 04 22 57.77 -01 01 12.0 V I52
2021-02-21 03:11:53 C 04 22 56.17 -01 01 40.0 V I52