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
2018-07-26 13:41:16 C 03 05 29.17 -08 04 59.2 U T05
2018-07-26 13:50:00 C 03 05 29.70 -08 05 00.0 U T05
2018-07-26 13:54:57 C 03 05 29.97 -08 04 59.7 U T05
2018-07-26 14:08:37 C 03 05 30.79 -08 04 59.6 U T05
2018-09-04 10:24:48 C 04 01 59.58 -10 26 43.9 V 703
2018-09-04 10:32:50 C 04 02 00.02 -10 26 46.2 V 703
2018-09-04 10:40:53 C 04 02 00.45 -10 26 48.9 V 703
2018-09-04 10:48:54 C 04 02 00.90 -10 26 51.6 V 703
2018-09-13 10:51:38 C 04 13 38.42 -11 44 16.1 U 703
2018-09-13 10:59:38 C 04 13 38.82 -11 44 19.3 U 703
2018-09-13 11:07:39 C 04 13 39.23 -11 44 22.5 U 703
2018-09-13 11:15:39 C 04 13 39.64 -11 44 25.9 U 703
2018-09-15 09:39:15 C 04 16 04.43 -12 03 47.2 V G96
2018-09-15 09:46:36 C 04 16 04.80 -12 03 50.4 V G96
2018-09-15 09:53:59 C 04 16 05.17 -12 03 53.9 V G96
2018-09-15 10:01:22 C 04 16 05.53 -12 03 56.7 V G96
2018-09-15 11:33:20 C 04 16 10.16 -12 04 36.6 U I41
2018-09-15 12:03:53 C 04 16 11.68 -12 04 49.8 U I41
2018-09-16 11:36:34 C 04 17 24.26 -12 15 04.0 V 703
2018-09-16 11:40:32 C 04 17 24.45 -12 15 05.8 V 703
2018-09-16 11:44:32 C 04 17 24.65 -12 15 07.5 V 703
2018-09-16 11:48:31 C 04 17 24.84 -12 15 09.5 V 703
2018-09-19 11:00:40 C 04 21 01.33 -12 47 48.3 U I41
2018-09-19 11:30:08 C 04 21 02.76 -12 48 02.4 U I41
2018-09-19 11:33:37 C 04 21 02.92 -12 48 04.1 U I41
2018-09-19 11:36:54 C 04 21 03.08 -12 48 05.7 U I41
2018-09-20 15:02:47 C 04 22 24.97 -13 01 20.4 U T05
2018-09-20 15:07:24 C 04 22 25.19 -13 01 22.5 U T05
2018-09-20 15:19:55 C 04 22 25.79 -13 01 28.8 U T05
2018-09-20 15:31:11 C 04 22 26.30 -13 01 34.7 U T05
2018-09-21 10:07:33 C 04 23 21.77 -13 10 49.6 V 703
2018-09-21 10:15:29 C 04 23 22.19 -13 10 53.8 V 703
2018-09-21 10:23:24 C 04 23 22.55 -13 10 57.8 V 703
2018-09-21 10:31:20 C 04 23 22.95 -13 11 01.9 V 703
2018-09-21 14:50:12 C 04 23 35.52 -13 13 10.3 U T05
2018-09-21 15:04:46 C 04 23 36.20 -13 13 17.5 U T05
2018-09-21 15:19:18 C 04 23 36.87 -13 13 24.6 U T05
2018-09-22 12:59:38 C 04 24 40.92 -13 24 27.3 U T08
2018-09-22 13:10:24 C 04 24 41.35 -13 24 33.4 U T08
2018-09-22 13:15:03 C 04 24 41.67 -13 24 35.0 U T08
2018-09-22 13:20:21 C 04 24 41.91 -13 24 37.8 U T08
2018-09-22 13:30:53 C 04 24 42.39 -13 24 42.8 U T08
2018-09-22 13:55:28 C 04 24 43.54 -13 24 55.7 U T08
2018-09-23 12:24:36 C 04 25 49.36 -13 36 40.7 U T08
2018-09-23 12:36:40 C 04 25 49.87 -13 36 47.1 U T08
2018-09-23 12:53:17 C 04 25 50.64 -13 36 56.0 U T08
2018-09-23 13:03:40 C 04 25 51.13 -13 37 01.3 U T08
2018-09-23 14:01:02 C 04 25 53.773 -13 37 32.07 U F52
2018-09-23 14:18:34 C 04 25 54.573 -13 37 41.34 U F52
2018-09-23 14:36:04 C 04 25 55.377 -13 37 50.65 U F52
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)