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
2025-03-06 07:15:52 C 09 25 25.987 +62 17 08.56 V T08
2025-03-06 07:17:52 C 09 25 25.469 +62 17 07.22 V T08
2025-03-06 07:23:32 C 09 25 23.947 +62 17 03.30 V T08
2025-03-06 07:33:11 C 09 25 21.377 +62 16 56.53 V T08
2025-03-06 18:20:27 B 09 22 33.38 +62 08 56.2 X L76
2025-03-06 18:30:45 B 09 22 30.65 +62 08 48.7 X L76
2025-03-06 18:41:01 B 09 22 27.93 +62 08 41.1 X L76
2025-03-07 09:23:12 C 09 18 40.670 +61 57 18.14 V T08
2025-03-07 09:27:49 C 09 18 39.451 +61 57 14.54 V T08
2025-03-07 09:35:51 C 09 18 37.366 +61 57 07.85 V T08
2025-03-07 10:26:58 C 09 18 24.005 +61 56 26.05 V T08
2025-03-07 20:23:57 B 09 15 52.67 +61 48 09.9 X L76
2025-03-07 20:29:04 B 09 15 51.35 +61 48 05.6 X L76
2025-03-07 20:34:10 B 09 15 50.03 +61 48 01.3 X L76
2025-03-07 20:39:17 B 09 15 48.71 +61 47 57.1 X L76
2025-03-07 20:44:23 B 09 15 47.39 +61 47 52.6 X L76
2025-03-07 20:49:29 B 09 15 46.09 +61 47 48.3 X L76
2025-03-08 20:04:52 B 09 09 56.93 +61 27 18.5 X L76
2025-03-08 20:15:07 B 09 09 54.36 +61 27 08.8 X L76
2025-03-08 20:25:24 B 09 09 51.79 +61 26 59.3 X L76
2025-03-09 00:38:01 C 09 08 48.64 +61 23 00.2 X C40
2025-03-09 00:41:42 C 09 08 47.70 +61 22 56.4 X C40
2025-03-09 00:45:23 C 09 08 46.78 +61 22 53.1 X C40
2025-03-09 00:49:02 C 09 08 45.90 +61 22 49.5 X C40
2025-03-09 00:52:43 C 09 08 45.01 +61 22 46.0 X C40
2025-03-09 00:56:24 C 09 08 44.10 +61 22 42.3 X C40
2025-03-09 01:00:04 C 09 08 43.20 +61 22 39.0 X C40
2025-03-09 01:03:45 C 09 08 42.26 +61 22 35.5 X C40
2025-03-09 01:07:26 C 09 08 41.37 +61 22 31.8 X C40
2025-03-09 01:11:07 C 09 08 40.47 +61 22 28.2 X C40
2025-03-09 01:14:48 C 09 08 39.56 +61 22 24.9 X C40
2025-03-09 01:18:28 C 09 08 38.63 +61 22 21.4 X C40
2025-03-09 01:58:49 C 09 08 30.106 +61 21 50.58 V W53
2025-03-09 02:09:34 C 09 08 27.389 +61 21 41.00 V W53
2025-03-09 02:21:08 C 09 08 24.490 +61 21 29.88 V W53
2025-03-09 04:01:05 C 09 07 59.450 +61 19 55.27 V W53
2025-03-09 04:11:48 C 09 07 56.758 +61 19 45.08 V W53
2025-03-09 04:23:30 C 09 07 53.856 +61 19 34.07 V W53
2025-03-09 09:52:27 C 09 06 33.161 +61 14 22.67 V T05
2025-03-09 09:57:03 C 09 06 32.006 +61 14 18.02 V T05
2025-03-09 10:05:54 C 09 06 29.772 +61 14 09.10 V T05
2025-03-09 23:31:20 C 09 03 14.53 +61 00 48.2 X D04
2025-03-09 23:38:50 C 09 03 12.52 +61 00 40.5 X D04
2025-03-10 00:05:06 C 09 03 06.26 +61 00 12.6 X D04
2025-03-10 19:05:12 C 08 58 36.936 +60 40 28.60 Z C23
2025-03-10 19:34:14 C 08 58 30.031 +60 39 58.43 Z C23
2025-03-10 20:09:52 C 08 58 21.432 +60 39 20.09 Z C23
2025-03-10 23:35:29 C 08 57 32.17 +60 35 35.8 X C40
2025-03-10 23:38:30 C 08 57 31.41 +60 35 33.1 X C40
2025-03-10 23:41:29 C 08 57 30.62 +60 35 28.4 X C40
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)