4953 (1990 MU)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6574752439 ± 6.44e-09
Semi-major axis (a)1.6214443779 AU ± 4.95e-10
Inclination (i)24.37896137° ± 7.77e-07
Long. of Asc. Node (Ω)77.52718564° ± 2.04e-06
Arg. of Perihelion (ω)77.92579270° ± 1.99e-06
Mean Anomaly (M)115.97675053° ± 1.07e-06
Mean Motion (n)0.4773744745°/day ± 2.19e-10
Perihelion dist (q)0.55538484 AU ± 1.04e-08
Aphelion dist (Q)2.68750392 AU ± 1.05e-08
Orbital Period2.06468158 yr ± 9.46e-10
Physical Parameters
H (abs. magnitude)14.88
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.179″
Uncertainty0
Orbit TypeApollo
MOID0.024785 AU
Observations Used2821
Radar Obs Used2
Gaia Obs Used92
Oppositions22
Arc Total1974-2025
First Observation Used1974-07-21
Last Observation Used2025-09-17
Observations (3883)
Date Type RA Dec Mag Band Observatory
2020-09-23 12:42:23 C 03 26 56.52 -21 45 53.8 V T08
2020-09-23 12:49:03 C 03 26 56.46 -21 45 58.9 V T08
2020-09-23 12:58:21 C 03 26 56.38 -21 46 05.9 V T08
2020-09-23 13:10:20 C 03 26 56.29 -21 46 14.8 V T08
2020-09-24 09:25:36 C 03 26 48.30 -22 01 42.8 V 703
2020-09-24 09:33:10 C 03 26 48.20 -22 01 48.9 V 703
2020-09-24 09:40:43 C 03 26 48.15 -22 01 54.8 V 703
2020-09-24 09:48:18 C 03 26 48.06 -22 02 00.4 V 703
2020-09-25 10:43:54 C 03 26 35.02 -22 21 19.1 V G96
2020-09-25 10:51:31 C 03 26 34.93 -22 21 25.2 V G96
2020-09-25 10:59:09 C 03 26 34.84 -22 21 31.1 V G96
2020-09-25 11:06:48 C 03 26 34.76 -22 21 36.9 V G96
2020-09-25 12:43:03 C 03 26 33.99 -22 22 51.0 V T05
2020-09-25 12:45:42 C 03 26 33.97 -22 22 52.9 V T05
2020-09-25 12:49:39 C 03 26 33.92 -22 22 56.0 V T05
2020-09-25 12:57:33 C 03 26 33.82 -22 23 02.4 V T05
2020-09-27 09:01:51 C 03 26 02.21 -22 57 55.4 V 703
2020-09-27 09:10:41 C 03 26 02.05 -22 58 02.2 V 703
2020-09-27 09:19:31 C 03 26 01.94 -22 58 09.9 V 703
2020-09-27 09:28:21 C 03 26 01.78 -22 58 16.8 V 703
2020-09-27 11:40:31 C 03 26 00.04 -23 00 01.4 V T08
2020-09-27 11:43:50 C 03 25 59.99 -23 00 04.2 V T08
2020-09-27 11:47:49 C 03 25 59.91 -23 00 07.3 V T08
2020-09-27 11:57:53 C 03 25 59.75 -23 00 15.3 V T08
2020-09-29 01:40:53 C 03 25 23.42 -23 30 38.9 o W92
2020-09-29 01:50:09 C 03 25 23.28 -23 30 46.9 o W92
2020-09-29 11:10:35 C 03 25 12.66 -23 38 37.8 V T05
2020-09-29 11:15:11 C 03 25 12.59 -23 38 41.8 V T05
2020-09-29 11:28:23 C 03 25 12.30 -23 38 52.7 V T05
2020-09-29 11:33:40 C 03 25 12.19 -23 38 57.2 V T05
2020-09-29 12:40:22 C 03 25 10.740 -23 39 52.21 U F51
2020-09-29 12:55:14 C 03 25 10.416 -23 40 04.44 U F51
2020-09-29 13:10:06 C 03 25 10.089 -23 40 16.73 U F51
2020-09-29 13:24:59 C 03 25 09.764 -23 40 29.04 U F51
2020-10-01 11:16:56 C 03 24 10.56 -24 18 41.5 V T08
2020-10-01 11:19:36 C 03 24 10.50 -24 18 43.7 V T08
2020-10-01 11:23:35 C 03 24 10.38 -24 18 47.2 V T08
2020-10-01 11:30:53 C 03 24 10.19 -24 18 53.5 V T08
2020-10-03 13:09:32 C 03 22 49.97 -25 01 10.8 V T05
2020-10-03 13:15:02 C 03 22 49.80 -25 01 15.4 V T05
2020-10-03 13:55:19 C 03 22 48.48 -25 01 50.0 V T05
2020-10-03 14:36:06 C 03 22 47.15 -25 02 25.1 V T05
2020-10-05 12:08:30 C 03 21 18.77 -25 41 58.2 V T08
2020-10-05 12:11:49 C 03 21 18.66 -25 42 01.4 V T08
2020-10-05 12:15:52 C 03 21 18.51 -25 42 05.0 V T08
2020-10-05 12:24:30 C 03 21 18.18 -25 42 12.3 V T08
2020-10-06 09:25:45 C 03 20 32.10 -26 00 43.1 V 703
2020-10-06 09:33:20 C 03 20 31.77 -26 00 50.4 V 703
2020-10-06 09:40:55 C 03 20 31.46 -26 00 55.6 V 703
2020-10-06 09:48:31 C 03 20 31.13 -26 01 02.7 V 703
Radar Observations (4)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1994-05-27 17:00:00 217197.3 5.5 Hz 8510 -14 -14
1994-05-27.708333 21719730 200 Hz 8510 253 253
1994-05-28 14:00:00 158792.8 5.5 Hz 8510 -14 -14
1994-05-28.583333 15879280 200 Hz 8510 253 253
Station codes
-14 DSS-14 Goldstone (70-m)