1981 Midas (1973 EA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6504955739 ± 4.39e-09
Semi-major axis (a)1.7762715081 AU ± 6.91e-10
Inclination (i)39.82339034° ± 1.52e-06
Long. of Asc. Node (Ω)356.79391976° ± 4.07e-07
Arg. of Perihelion (ω)267.84423496° ± 9.83e-07
Mean Anomaly (M)65.34753960° ± 7.65e-07
Mean Motion (n)0.4163401091°/day ± 2.43e-10
Perihelion dist (q)0.62081475 AU ± 7.80e-09
Aphelion dist (Q)2.93172826 AU ± 7.88e-09
Orbital Period2.36735847 yr ± 1.38e-09
Physical Parameters
H (abs. magnitude)15.28
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.228″
Uncertainty0
Orbit TypeApollo
MOID0.003514 AU
Observations Used2243
Radar Obs Used7
Gaia Obs Used28
Oppositions25
Arc Total1973-2026
First Observation Used1973-03-06
Last Observation Used2026-01-02
Observations (2402)
Date Type RA Dec Mag Band Observatory
2025-02-27 00:54:47 C 10 12 08.772 +63 29 05.28 V R17
2025-02-27 01:15:51 C 10 12 03.024 +63 29 02.76 V R17
2025-02-27 07:43:05 C 10 10 19.355 +63 28 13.40 V 703
2025-02-27 07:46:34 C 10 10 18.383 +63 28 12.61 V 703
2025-02-27 07:50:04 C 10 10 17.440 +63 28 12.36 V 703
2025-02-27 07:53:34 C 10 10 16.460 +63 28 11.68 V 703
2025-02-27 14:08:15 C 10 08 34.985 +63 27 13.64 V T08
2025-02-27 14:10:56 C 10 08 34.258 +63 27 12.92 V T08
2025-02-27 14:18:28 C 10 08 32.210 +63 27 11.59 V T08
2025-02-27 14:19:49 C 10 08 31.848 +63 27 11.41 V T08
2025-02-27 14:23:53 C 10 08 30.739 +63 27 10.76 V T08
2025-02-27 14:26:37 C 10 08 29.988 +63 27 10.19 V T08
2025-02-27 15:13:31 C 10 08 17.340 +63 27 00.72 V T08
2025-02-27 15:16:13 C 10 08 16.570 +63 27 00.25 V T08
2025-02-27 15:44:20 C 10 08 08.988 +63 26 54.49 V T08
2025-02-27 15:53:50 C 10 08 06.401 +63 26 53.16 V T08
2025-03-01 09:43:54 C 09 56 50.676 +63 17 11.58 V T05
2025-03-01 09:48:28 C 09 56 49.411 +63 17 10.21 V T05
2025-03-01 09:57:05 C 09 56 47.038 +63 17 07.51 V T05
2025-03-01 10:12:21 C 09 56 42.804 +63 17 02.80 V T05
2025-03-01 10:13:00 C 09 56 42.636 +63 17 02.58 V T05
2025-03-01 10:58:58 C 09 56 29.906 +63 16 47.96 V T05
2025-03-01 11:03:33 C 09 56 28.639 +63 16 46.52 V T05
2025-03-01 11:11:24 C 09 56 26.489 +63 16 43.90 V T05
2025-03-02 07:41:45 C 09 50 54.893 +63 09 36.76 V T05
2025-03-02 07:47:46 C 09 50 53.251 +63 09 34.78 V T05
2025-03-02 08:10:53 C 09 50 46.836 +63 09 26.21 V T08
2025-03-02 08:17:54 C 09 50 44.892 +63 09 23.72 V T08
2025-03-03 09:47:26 C 09 43 51.588 +62 58 27.98 V T08
2025-03-03 09:52:05 C 09 43 50.285 +62 58 25.90 V T08
2025-03-03 10:00:43 C 09 43 47.904 +62 58 21.68 V T08
2025-03-03 18:14:26 B 09 41 36.449 +62 54 13.10 V 160
2025-03-03 18:21:22 B 09 41 34.582 +62 54 10.08 V 160
2025-03-03 18:28:16 B 09 41 32.690 +62 54 07.02 V 160
2025-03-04 03:04:25 B 09 39 13.68 +62 49 43.1 Z W45
2025-03-04 03:23:36 B 09 39 08.42 +62 49 33.1 Z W45
2025-03-04 03:43:51 B 09 39 02.90 +62 49 22.2 Z W45
2025-03-04 20:33:04 B 09 34 34.11 +62 39 49.3 V 130
2025-03-04 20:35:05 B 09 34 33.54 +62 39 48.2 V 130
2025-03-04 20:37:36 B 09 34 32.87 +62 39 46.7 V 130
2025-03-04 20:40:07 B 09 34 32.21 +62 39 45.2 V 130
2025-03-05 09:46:22 C 09 31 03.350 +62 31 43.75 V T05
2025-03-05 09:50:57 C 09 31 02.018 +62 31 39.72 V T05
2025-03-05 09:51:36 C 09 31 01.910 +62 31 39.97 V T05
2025-03-05 10:01:39 C 09 30 59.191 +62 31 33.46 V T05
2025-03-05 10:16:12 C 09 30 55.229 +62 31 24.10 V T05
2025-03-05 10:16:51 C 09 30 55.099 +62 31 23.56 V T05
2025-03-05 18:47:58 C 09 28 41.82 +62 25 41.4 Z M62
2025-03-05 19:08:56 C 09 28 36.26 +62 25 27.6 Z M62
2025-03-05 19:29:17 C 09 28 30.86 +62 25 14.3 Z M62
Radar Observations (8)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1987-09-25 04:00:00 -1130345 21 Hz 8495 -14 -14
1987-09-25.166667 -113034500 1500 Hz 8495 253 253
2018-03-21 22:59:00 89358361.22 1.11 us 2380 -1 -1
2018-03-22 23:24:00 90863191.54 1.53 us 2380 -1 -1
2018-03-23 22:02:00 94516753.78 1.35 us 2380 -1 -1
2018-03-23 23:26:00 94811323.08 1.19 us 2380 -1 -1
2018-03-24 21:24:00 100309946.32 1.29 us 2380 -1 -1
2018-03-25 21:34:00 108108721.41 1.65 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)