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
2025-11-17 07:49:29 C 23 15 16.481 +46 03 29.84 V T08
2025-11-17 08:01:21 C 23 15 16.274 +46 03 21.06 V T08
2025-11-17 08:15:54 C 23 15 16.051 +46 03 11.99 V T08
2025-11-17 08:16:33 C 23 15 16.049 +46 03 12.02 V T08
2025-11-17 19:54:14 C 23 15 08.21 +45 55 34.4 X C40
2025-11-17 20:04:21 C 23 15 08.02 +45 55 27.7 X C40
2025-11-17 20:14:20 C 23 15 07.85 +45 55 21.3 X C40
2025-11-18 00:07:59 B 23 15 05.395 +45 52 49.66 q Y84
2025-11-18 00:12:23 B 23 15 05.366 +45 52 46.96 q Y84
2025-11-18 00:16:48 B 23 15 05.282 +45 52 43.90 q Y84
2025-11-22 10:59:44 C 23 14 37.12 +44 47 00.6 V D29
2025-11-22 11:20:06 C 23 14 37.09 +44 46 48.7 V D29
2025-11-22 11:40:28 C 23 14 37.07 +44 46 36.5 V D29
2025-11-26 02:58:04 C 23 15 03.632 +43 57 29.48 V G96
2025-11-26 03:06:15 C 23 15 03.690 +43 57 25.00 V G96
2025-11-26 03:14:27 C 23 15 03.720 +43 57 20.40 V G96
2025-11-26 03:22:38 C 23 15 03.780 +43 57 16.40 V G96
2025-11-27 06:05:26 C 23 15 19.949 +43 43 07.29 X F51
2025-11-27 06:17:58 C 23 15 20.064 +43 43 00.69 X F51
2025-11-27 06:30:31 C 23 15 20.173 +43 42 54.09 X F51
2025-11-27 06:43:05 C 23 15 20.290 +43 42 47.42 X F51
2025-11-29 07:31:55 C 23 15 58.675 +43 17 57.12 V T08
2025-11-29 07:37:11 C 23 15 58.692 +43 17 54.64 V T08
2025-11-29 07:45:44 C 23 15 58.752 +43 17 50.28 V T08
2025-11-29 07:51:00 C 23 15 58.850 +43 17 46.75 V T08
2025-11-29 07:55:37 C 23 15 58.901 +43 17 45.13 V T08
2025-11-29 08:08:49 C 23 15 59.102 +43 17 38.58 V T08
2025-12-08 03:37:01 C 23 20 39.516 +41 45 24.59 V G96
2025-12-08 03:45:07 C 23 20 39.714 +41 45 21.67 V G96
2025-12-08 03:53:12 C 23 20 39.934 +41 45 18.32 V G96
2025-12-08 04:01:18 C 23 20 40.160 +41 45 15.05 V G96
2025-12-10 06:56:26 C 23 22 11.165 +41 26 39.44 V T05
2025-12-10 07:01:04 C 23 22 11.378 +41 26 37.57 V T05
2025-12-10 07:11:40 C 23 22 11.714 +41 26 33.61 V T05
2025-12-10 07:43:27 C 23 22 12.566 +41 26 21.98 V T05
2025-12-11 06:38:01 C 23 22 56.333 +41 18 27.40 V T08
2025-12-11 06:45:55 C 23 22 56.592 +41 18 23.94 V T08
2025-12-11 06:55:47 C 23 22 56.930 +41 18 20.70 V T08
2025-12-11 07:28:59 C 23 22 57.910 +41 18 07.99 V T08
2025-12-15 02:11:35 C 23 26 05.824 +40 49 22.40 V G96
2025-12-15 02:19:54 C 23 26 06.148 +40 49 19.81 V G96
2025-12-15 02:28:10 C 23 26 06.421 +40 49 17.83 V G96
2025-12-15 02:36:27 C 23 26 06.724 +40 49 14.66 V G96
2025-12-18 01:56:55 C 23 28 49.717 +40 29 27.78 V G96
2025-12-18 02:05:11 C 23 28 50.034 +40 29 25.62 V G96
2025-12-18 02:13:27 C 23 28 50.365 +40 29 23.64 V G96
2025-12-18 02:21:44 C 23 28 50.682 +40 29 21.12 V G96
2025-12-24 05:11:40 C 23 35 03.237 +39 56 09.36 X F51
2025-12-24 05:30:31 C 23 35 04.050 +39 56 05.57 X F51
2025-12-24 05:49:05 C 23 35 04.866 +39 56 01.92 X F51
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)