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
2023-10-26 10:15:23 C 04 07 02.302 +72 18 27.66 X F52
2024-11-25 14:27:46 C 11 35 49.056 +45 01 30.90 V T05
2024-11-25 14:35:21 C 11 35 49.642 +45 01 31.22 V T05
2024-11-25 14:38:39 C 11 35 49.718 +45 01 31.33 V T05
2024-11-25 15:00:42 C 11 35 51.019 +45 01 33.92 V T05
2024-12-09 11:00:53 C 11 54 36.659 +45 52 46.74 V G96
2024-12-09 11:08:14 C 11 54 37.033 +45 52 48.40 V G96
2024-12-09 11:15:35 C 11 54 37.415 +45 52 49.98 V G96
2024-12-09 11:22:59 C 11 54 37.836 +45 52 51.60 V G96
2024-12-09 14:37:40 C 11 54 47.767 +45 53 35.45 V T08
2024-12-09 14:49:26 C 11 54 48.396 +45 53 38.69 V T08
2024-12-09 14:56:11 C 11 54 48.814 +45 53 39.59 V T08
2024-12-09 15:23:55 C 11 54 50.143 +45 53 46.43 V T08
2024-12-19 09:51:31 C 12 05 57.174 +46 58 51.02 V G96
2024-12-19 10:05:33 C 12 05 57.757 +46 58 55.81 V G96
2024-12-19 10:12:25 C 12 05 58.049 +46 58 58.19 V G96
2024-12-19 10:19:17 C 12 05 58.326 +46 59 00.64 V G96
2024-12-19 14:00:27 C 12 06 07.879 +47 00 15.01 V T05
2024-12-19 14:25:35 C 12 06 08.762 +47 00 24.88 V T05
2024-12-19 14:46:27 C 12 06 09.703 +47 00 32.51 V T05
2024-12-19 14:52:26 C 12 06 09.847 +47 00 34.45 V T05
2024-12-21 14:14:15 C 12 08 07.795 +47 17 06.86 V T08
2024-12-21 14:19:34 C 12 08 08.004 +47 17 10.10 V T08
2024-12-21 14:28:18 C 12 08 08.309 +47 17 11.98 V T08
2024-12-21 14:45:52 C 12 08 08.930 +47 17 19.82 V T08
2024-12-22 14:33:08 C 12 09 05.744 +47 26 05.12 X F52
2024-12-22 14:51:31 C 12 09 06.430 +47 26 12.04 X F52
2024-12-22 15:09:54 C 12 09 07.111 +47 26 19.08 X F52
2024-12-22 15:28:17 C 12 09 07.798 +47 26 26.08 X F52
2024-12-27 13:22:17 C 12 13 22.805 +48 14 29.47 V T05
2024-12-27 13:26:53 C 12 13 22.896 +48 14 31.60 V T05
2024-12-27 13:48:27 C 12 13 23.606 +48 14 40.81 V T05
2024-12-27 13:57:55 C 12 13 23.887 +48 14 45.17 V T05
2024-12-29 13:33:24 C 12 14 53.030 +48 36 22.79 V T08
2024-12-29 13:40:51 C 12 14 53.234 +48 36 26.46 V T08
2024-12-29 13:48:57 C 12 14 53.450 +48 36 30.96 V T08
2024-12-29 14:06:18 C 12 14 53.923 +48 36 38.56 V T08
2024-12-31 11:27:25 C 12 16 10.524 +48 58 28.31 V G96
2024-12-31 11:35:04 C 12 16 10.704 +48 58 32.20 V G96
2024-12-31 11:42:43 C 12 16 10.895 +48 58 36.01 V G96
2024-12-31 11:50:22 C 12 16 11.096 +48 58 39.79 V G96
2025-01-02 13:22:03 C 12 17 25.142 +49 23 54.10 V T08
2025-01-02 13:24:42 C 12 17 25.202 +49 23 55.90 V T08
2025-01-02 13:28:39 C 12 17 25.255 +49 23 57.91 V T08
2025-01-02 13:32:37 C 12 17 25.330 +49 23 59.46 V T08
2025-01-02 13:38:45 C 12 17 25.466 +49 24 03.42 V T08
2025-01-02 13:45:44 C 12 17 25.594 +49 24 06.88 V T08
2025-01-04 14:25:55 C 12 18 27.154 +49 50 19.25 V T05
2025-01-04 14:29:12 C 12 18 27.214 +49 50 21.23 V T05
2025-01-04 14:37:08 C 12 18 27.336 +49 50 25.80 V T05
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)