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
2020-12-29 04:45:40 C 22 36 51.56 -12 54 17.4 V T08
2020-12-29 04:58:16 C 22 36 49.28 -12 53 50.4 V T08
2020-12-29 05:13:35 C 22 36 46.52 -12 53 17.3 V T08
2020-12-30 19:43:32 C 22 29 53.16 -11 30 41.2 o Z22
2020-12-30 19:48:51 C 22 29 52.17 -11 30 30.6 o Z22
2020-12-30 19:54:12 C 22 29 51.20 -11 30 18.9 o Z22
2021-01-04 04:59:41 C 22 09 36.73 -07 44 10.6 V T05
2021-01-04 05:04:20 C 22 09 35.77 -07 44 00.7 V T05
2021-01-04 05:15:34 C 22 09 33.44 -07 43 36.5 V T05
2021-01-04 05:30:09 C 22 09 30.42 -07 43 05.3 V T05
2021-01-06 01:53:51 C 22 00 15.23 -06 09 21.7 U I41
2021-01-06 01:57:25 C 22 00 14.45 -06 09 14.2 U I41
2021-01-06 02:00:59 C 22 00 13.69 -06 09 06.8 U I41
2021-01-06 02:04:31 C 22 00 12.92 -06 08 59.4 U I41
2021-01-06 02:08:05 C 22 00 12.14 -06 08 51.9 U I41
2021-01-06 02:12:08 C 22 00 11.25 -06 08 43.4 U I41
2021-01-06 02:15:43 C 22 00 10.46 -06 08 36.1 U I41
2021-01-06 02:19:16 C 22 00 09.71 -06 08 28.4 U I41
2021-01-06 02:22:50 C 22 00 08.94 -06 08 21.1 U I41
2021-01-06 02:26:24 C 22 00 08.15 -06 08 13.5 U I41
2021-01-09 02:15:38 C 21 44 13.56 -03 42 20.7 U I41
2021-01-09 02:19:09 C 21 44 12.74 -03 42 14.0 U I41
2021-01-09 02:22:39 C 21 44 11.93 -03 42 07.2 U I41
2021-01-09 02:26:08 C 21 44 11.12 -03 42 00.4 U I41
2021-02-19 13:21:17 C 19 34 12.94 -05 45 31.3 U I41
2021-02-19 13:24:48 C 19 34 13.13 -05 45 35.2 U I41
2021-02-19 13:28:17 C 19 34 13.31 -05 45 39.1 U I41
2021-02-19 13:31:47 C 19 34 13.49 -05 45 43.0 U I41
2021-02-20 13:17:49 C 19 35 32.76 -06 11 52.4 U I41
2021-02-20 13:21:13 C 19 35 32.96 -06 11 56.3 U I41
2021-02-20 13:24:38 C 19 35 33.14 -06 11 59.9 U I41
2021-02-20 13:28:05 C 19 35 33.34 -06 12 03.6 U I41
2021-02-20 13:31:29 C 19 35 33.52 -06 12 07.3 U I41
2021-03-03 15:18:44 C 19 55 29.01 -10 28 38.0 V T08
2021-03-03 15:22:44 C 19 55 29.35 -10 28 41.5 V T08
2021-03-03 15:26:43 C 19 55 29.69 -10 28 44.7 V T08
2021-03-03 15:30:42 C 19 55 30.03 -10 28 47.9 V T08
2021-03-21 04:12:38 C 20 33 27.41 -15 16 43.1 V K83
2021-03-21 04:15:48 C 20 33 27.63 -15 16 44.6 V K83
2021-03-21 04:17:54 C 20 33 27.59 -15 16 46.6 V K83
2021-04-15 14:31:21 C 21 22 56.26 -20 16 51.1 V T08
2021-04-15 14:51:55 C 21 22 57.67 -20 17 00.7 V T08
2021-04-15 15:07:11 C 21 22 58.72 -20 17 08.1 V T08
2021-04-17 14:34:46 C 21 26 16.83 -20 39 44.9 V T05
2021-04-17 14:40:43 C 21 26 17.21 -20 39 47.7 V T05
2021-04-17 14:57:15 C 21 26 18.33 -20 39 55.9 V T05
2021-04-17 15:11:46 C 21 26 19.30 -20 40 02.7 V T05
2021-05-01 14:21:38 C 21 46 51.67 -23 31 49.3 V T08
2021-05-01 14:37:36 C 21 46 52.49 -23 31 58.5 V T08
2021-05-01 14:52:05 C 21 46 53.24 -23 32 07.0 V T08
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)