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
1974-07-21 17:55:20 A 00 11 28.33 -34 30 14.6 413
1974-07-23 18:16:19 A 00 10 49.66 -34 59 55.8 413
1974-07-23 19:06:19 A 00 10 48.90 -35 00 27.2 413
1976-08-20 15:09:30 A 23 22 48.37 -44 01 38.0 413
1978-08-10 12:30:08 A 23 15 57.41 -43 41 58.5 413
1987-11-26 10:15:34 A 01 03 24.65 -39 12 51.2 413
1987-11-26 11:40:13 A 01 02 57.08 -39 12 16.6 413
1987-11-26 12:10:09 A 01 02 47.35 -39 12 02.4 413
1987-11-27 10:14:01 A 00 55 47.81 -39 01 50.2 413
1988-07-12 14:48:52 A 21 38 14.23 -47 27 55.2 413
1988-07-12 16:28:51 A 21 38 04.85 -47 29 14.5 413
1990-06-23 18:41:03 A 21 35 15.94 -42 46 33.9 413
1990-06-23 19:41:02 A 21 35 11.24 -42 47 42.0 413
1990-06-29 17:32:34 A 21 22 48.72 -45 28 03.7 413
1990-06-29 19:02:34 A 21 22 39.48 -45 29 39.7 413
1990-07-25 14:34:34 A 20 08 41.86 -52 25 06.8 413
1990-07-25 15:06:52 A 20 08 37.97 -52 25 13.8 413
1991-10-07 16:50:00 A 01 52 52.91 -34 05 48.6 413
1991-10-15 16:32:59 A 01 35 57.94 -35 38 44.2 413
1991-11-26 13:15:40 A 00 11 02.31 -31 37 04.8 413
1991-11-26 13:20:30 A 00 11 02.06 -31 37 00.8 413
1992-01-15 10:48:21 00 12 03.00 -10 38 01.3 413
1992-01-15 10:54:01 00 12 03.19 -10 37 54.1 413
1992-06-19 15:58:22 C 20 50 19.64 -44 07 45.3 413
1992-06-19 16:00:48 C 20 50 19.29 -44 07 49.1 413
1992-08-20 12:29:15 C 18 17 04.76 -49 25 53.5 413
1992-08-20 12:32:32 C 18 17 04.74 -49 25 52.5 413
1992-08-21 13:21:51 C 18 17 01.48 -49 17 35.5 413
1992-08-21 13:24:50 C 18 17 01.47 -49 17 34.7 413
1992-10-06 10:54:46 C 18 54 38.84 -43 49 44.2 413
1992-10-06 10:58:36 C 18 54 39.06 -43 49 43.2 413
1993-07-31 16:31:09 C 01 58 50.58 -21 05 27.7 413
1993-07-31 16:36:27 C 01 58 50.70 -21 05 29.4 413
1993-08-24 17:32:47 C 02 03 44.69 -26 02 51.6 413
1993-08-24 17:37:01 C 02 03 44.64 -26 02 54.4 413
1994-01-22 10:36:54 C 00 22 07.16 -11 25 05.4 413
1994-01-22 10:41:39 C 00 22 07.41 -11 25 00.3 413
1994-05-21 08:06:17 C 23 22 09.49 +22 13 33.7 14.9 z 816
1994-05-21 08:10:59 C 23 22 07.78 +22 13 06.1 14.9 z 816
1994-05-21 08:14:49 C 23 22 06.42 +22 12 43.7 14.8 z 816
1994-05-21 08:18:09 C 23 22 05.19 +22 12 24.3 14.8 z 816
1994-06-11 15:14:42 19 33 19.66 -40 22 42.7 423
1994-06-11 16:14:49 19 32 52.65 -40 26 13.5 423
1994-06-17 17:06:08 C 18 37 48.91 -46 15 55.6 413
1994-06-17 17:08:12 C 18 37 48.21 -46 15 58.6 413
1994-06-18 10:35:50 C 18 32 16.85 -46 40 38.3 413
1994-06-18 10:37:57 C 18 32 16.17 -46 40 41.4 413
1994-07-07 23:06:44 C 17 09 19.85 -49 01 34.9 809
1994-07-08 23:12:27 C 17 07 31.96 -48 57 40.5 809
1994-07-10 03:57:32 C 17 05 34.47 -48 52 37.0 809
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)