IAA RAS IAA Minor Planet Database

2021 AL4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3467600000
Semi-major axis (a)1.6280730000 AU
Inclination (i)4.88501000°
Long. of Asc. Node (Ω)325.81745000°
Arg. of Perihelion (ω)171.96691000°
Mean Anomaly (M)110.75738000°
Mean Motion (n)0.4744530600°/day
Perihelion dist (q)1.06352240 AU
Aphelion dist (Q)2.19262360 AU
Orbital Period2.07735540 yr
Physical Parameters
H (abs. magnitude)25.40
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date—
RMS Residual0.660″
Uncertainty9
Orbit TypeAmor
MOID0.077450 AU
Observations Used14
Oppositions1
Arc Total—
First Observation Used—
Last Observation Used2021-01-12
Observations (48)
Date Type RA Dec Mag Band Observatory
2021-01-08 12:43:48 C 09 27 53.519 +41 06 55.10 – U F51
2021-01-08 12:59:49 C 09 27 56.265 +41 06 36.10 – U F51
2021-01-08 13:15:52 C 09 27 59.024 +41 06 16.96 – U F51
2021-01-08 13:31:51 C 09 28 01.767 +41 05 57.48 – U F51
2021-01-09 10:41:16 C 09 32 11.41 +40 39 44.5 – V V06
2021-01-09 10:46:59 C 09 32 12.40 +40 39 36.7 – V V06
2021-01-09 10:52:41 C 09 32 13.41 +40 39 29.1 – V V06
2021-01-09 10:58:25 C 09 32 14.45 +40 39 21.5 – V V06
2021-01-10 08:38:41 C 09 36 34.56 +40 10 43.1 – V V06
2021-01-10 08:44:24 C 09 36 35.52 +40 10 35.3 – V V06
2021-01-12 08:14:51 C 09 46 02.49 +39 00 16.5 – V V06
2021-01-12 08:19:25 C 09 46 03.27 +39 00 09.8 – V V06
2021-01-12 08:23:59 C 09 46 04.10 +39 00 02.2 – V V06
2021-01-12 08:28:33 C 09 46 04.89 +38 59 55.7 – V V06
2021-02-05 07:38:37 C 11 27 37.63 +11 11 02.8 – u 807
2021-02-05 07:50:28 C 11 27 38.99 +11 10 18.7 – u 807
2021-02-05 08:02:19 C 11 27 40.28 +11 09 34.5 – u 807
2021-02-06 08:40:04 C 11 30 54.14 +09 36 28.8 – V G96
2021-02-06 08:47:30 C 11 30 54.82 +09 36 01.7 – V G96
2021-02-06 08:54:57 C 11 30 55.61 +09 35 34.3 – V G96
2021-02-06 09:02:22 C 11 30 56.36 +09 35 06.4 – V G96
2021-02-06 10:34:42 C 11 31 05.80 +09 29 25.0 – V V06
2021-02-06 10:39:16 C 11 31 06.28 +09 29 08.2 – V V06
2021-02-06 10:43:50 C 11 31 06.73 +09 28 51.5 – V V06
2021-02-06 10:48:24 C 11 31 07.21 +09 28 34.2 – V V06
2021-02-17 11:23:15 C 11 57 19.370 -05 31 11.27 – U F52
2021-02-17 11:40:52 C 11 57 20.249 -05 32 03.56 – U F52
2021-02-17 11:58:26 C 11 57 21.097 -05 32 55.72 – U F52
2021-02-17 14:08:04 C 11 57 30.38 -05 37 42.8 – V 474
2021-02-17 14:13:11 C 11 57 30.66 -05 37 58.0 – V 474
2021-02-17 14:18:18 C 11 57 30.93 -05 38 13.1 – V 474
2021-02-18 08:50:39 C 11 58 46.56 -06 32 25.0 – u 807
2021-02-18 08:58:55 C 11 58 46.95 -06 32 48.4 – u 807
2021-02-18 09:07:02 C 11 58 47.34 -06 33 11.4 – u 807
2021-02-18 10:18:05 C 11 58 54.10 -06 38 08.2 – V V06
2021-02-18 10:20:39 C 11 58 54.22 -06 38 14.9 – V V06
2021-02-18 10:23:12 C 11 58 54.31 -06 38 23.3 – V V06
2021-02-20 08:28:35 C 12 01 52.68 -08 44 18.3 – u 807
2021-02-20 08:37:53 C 12 01 53.04 -08 44 42.5 – u 807
2021-02-20 08:46:45 C 12 01 53.41 -08 45 06.0 – u 807
2021-02-20 09:24:54 C 12 01 58.34 -08 48 17.7 – V I52
2021-02-20 09:30:56 C 12 01 58.53 -08 48 33.8 – V I52
2021-02-20 09:36:59 C 12 01 58.79 -08 48 49.8 – V I52
2021-03-08 06:02:31 C 12 14 43.78 -20 40 27.7 – u 807
2021-03-08 06:13:08 C 12 14 43.69 -20 40 39.8 – u 807
2021-03-17 05:48:45 C 12 15 29.57 -23 38 15.2 – V 807
2021-03-17 05:53:32 C 12 15 29.50 -23 38 17.8 – V 807
2021-03-17 05:59:22 C 12 15 29.39 -23 38 21.1 – V 807