IAA RAS IAA Minor Planet Database

2021 PJ1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3436640055 ± 1.57e-07
Semi-major axis (a)1.2149589783 AU ± 7.70e-09
Inclination (i)0.37314499° ± 3.20e-07
Long. of Asc. Node (Ω)223.79996729° ± 6.03e-04
Arg. of Perihelion (ω)178.03358139° ± 5.89e-04
Mean Anomaly (M)28.33808508° ± 5.18e-06
Mean Motion (n)0.7359865098°/day ± 6.99e-09
Perihelion dist (q)0.79742131 AU ± 1.91e-07
Aphelion dist (Q)1.63249665 AU ± 1.91e-07
Orbital Period1.33919069 yr ± 1.27e-08
Physical Parameters
H (abs. magnitude)25.78
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.178″
Uncertainty0
Orbit TypeApollo
MOID0.006109 AU
Observations Used77
Radar Obs Used1
Oppositions1
Arc Total2021-2025
First Observation Used2021-08-04
Last Observation Used2025-08-11
Observations (89)
Date Type RA Dec Mag Band Observatory
2021-08-04 09:08:10 C 20 30 53.539 -12 23 31.47 – U F51
2021-08-04 09:25:05 C 20 30 50.129 -12 23 16.51 – U F51
2021-08-04 09:58:49 C 20 30 43.279 -12 22 46.11 – U F51
2021-08-04 12:56:29 C 20 30 07.363 -12 19 53.49 – V F51
2021-08-04 12:57:24 C 20 30 07.185 -12 19 52.49 – V F51
2021-08-04 20:51:29 C 20 28 57.02 -12 10 27.4 – V L81
2021-08-04 22:02:58 C 20 28 41.50 -12 09 17.7 – V L81
2021-08-04 22:13:13 C 20 28 39.23 -12 09 07.3 – V L81
2021-08-05 04:41:50 C 20 27 29.37 -12 04 58.3 – u H21
2021-08-05 04:46:15 C 20 27 28.39 -12 04 53.3 – u H21
2021-08-05 04:49:53 C 20 27 27.58 -12 04 49.9 – u H21
2021-08-05 04:59:24 C 20 27 25.45 -12 04 39.8 – u H21
2021-08-05 06:34:50 C 20 27 01.15 -11 59 57.2 – u 807
2021-08-05 06:38:39 C 20 27 00.29 -11 59 52.8 – u 807
2021-08-05 06:42:41 C 20 26 59.38 -11 59 48.0 – u 807
2021-08-05 08:02:47 C 20 26 54.763 -12 00 40.34 – V F51
2021-08-05 08:03:58 C 20 26 54.498 -12 00 39.17 – V F51
2021-08-05 08:27:38 C 20 26 48.978 -12 00 14.65 – V F51
2021-08-05 08:28:49 C 20 26 48.699 -12 00 13.38 – V F51
2021-08-05 08:40:06 C 20 26 46.040 -12 00 01.67 – V F51
2021-08-05 08:41:16 C 20 26 45.777 -12 00 00.33 – V F51
2021-08-05 20:24:08 C 20 24 24.83 -11 47 20.4 – V L01
2021-08-05 20:30:21 C 20 24 23.36 -11 47 13.2 – V L01
2021-08-05 20:34:06 C 20 24 22.42 -11 47 08.7 – V L01
2021-08-06 01:10:57 C 20 23 22.18 -11 38 35.7 – X Y00
2021-08-06 01:15:23 C 20 23 20.95 -11 38 30.0 – X Y00
2021-08-06 01:19:36 C 20 23 19.87 -11 38 24.6 – X Y00
2021-08-06 09:39:15 C 20 21 22.794 -11 29 30.17 – U F51
2021-08-06 09:59:33 C 20 21 16.940 -11 29 02.35 – U F51
2021-08-06 10:19:58 C 20 21 11.045 -11 28 34.00 – U F51
2021-08-08 20:19:28 C 20 02 48.45 -09 41 01.1 – V 033
2021-08-08 20:19:58 C 20 02 48.23 -09 40 59.9 – V 033
2021-08-08 20:20:28 C 20 02 48.00 -09 40 58.2 – V 033
2021-08-08 20:21:02 C 20 02 47.73 -09 40 57.1 – V 033
2021-08-09 20:14:37 C 19 51 01.69 -08 29 12.3 – V 033
2021-08-09 20:15:02 C 19 51 01.43 -08 29 10.7 – V 033
2021-08-09 20:15:26 C 19 51 01.22 -08 29 09.6 – V 033
2021-08-09 20:15:59 C 19 51 00.85 -08 29 07.6 – V 033
2021-08-10 22:45:31 C 19 32 32.05 -06 26 56.4 – V K91
2021-08-10 22:50:41 C 19 32 27.35 -06 26 28.7 – V K91
2021-08-10 22:55:51 C 19 32 22.64 -06 26 00.3 – V K91
2021-08-10 23:28:18 C 19 31 53.17 -06 23 01.9 – V K91
2021-08-10 23:34:06 C 19 31 47.88 -06 22 29.8 – V K91
2021-08-10 23:52:55 C 19 31 30.78 -06 20 45.3 – V K91
2021-08-10 23:56:48 C 19 31 27.26 -06 20 23.6 – V K91
2021-08-11 02:23:35 C 19 29 38.11 -06 07 05.4 – u 807
2021-08-11 02:27:29 C 19 29 34.31 -06 06 43.4 – u 807
2021-08-11 02:31:15 C 19 29 30.68 -06 06 21.9 – u 807
2021-08-11 20:00:55 C 19 11 44.77 -04 17 51.7 – V 033
2021-08-11 20:01:20 C 19 11 44.26 -04 17 48.6 – V 033
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2021-08-14 21:30:00 96449.267 1 Hz 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)