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
2025-03-23 21:16:33 C 08 00 50.31 +52 56 43.6 X D04
2025-03-23 21:29:50 C 08 00 48.53 +52 56 20.3 X D04
2025-03-23 21:34:10 C 08 00 47.84 +52 56 11.9 X D04
2025-03-23 21:42:49 C 08 00 46.65 +52 55 56.2 X D04
2025-03-23 21:47:09 C 08 00 46.11 +52 55 49.0 X D04
2025-03-23 21:51:29 C 08 00 45.56 +52 55 41.4 X D04
2025-03-24 05:10:18 C 07 59 48.268 +52 42 34.70 V 703
2025-03-24 05:13:29 C 07 59 47.846 +52 42 28.69 V 703
2025-03-24 05:16:39 C 07 59 47.436 +52 42 23.33 V 703
2025-03-24 05:19:49 C 07 59 47.011 +52 42 17.42 V 703
2025-03-24 19:39:21 C 07 57 56.97 +52 16 10.2 X C40
2025-03-24 19:43:46 C 07 57 56.39 +52 16 02.1 X C40
2025-03-24 19:48:11 C 07 57 55.83 +52 15 54.0 X C40
2025-03-24 19:52:34 C 07 57 55.28 +52 15 45.9 X C40
2025-03-24 19:56:59 C 07 57 54.70 +52 15 37.6 X C40
2025-03-24 20:01:23 C 07 57 54.13 +52 15 29.5 X C40
2025-03-24 20:05:48 C 07 57 53.56 +52 15 21.4 X C40
2025-03-24 20:10:13 C 07 57 53.00 +52 15 13.2 X C40
2025-03-24 20:14:26 C 07 57 52.45 +52 15 05.5 X C40
2025-03-24 20:18:29 C 07 57 51.93 +52 14 57.8 X C40
2025-03-24 20:22:31 C 07 57 51.43 +52 14 50.3 X C40
2025-03-24 20:26:34 C 07 57 50.89 +52 14 42.9 X C40
2025-03-24 22:27:46 C 07 57 35.51 +52 10 57.1 X D04
2025-03-24 22:53:14 C 07 57 32.32 +52 10 09.6 X D04
2025-03-24 23:18:24 C 07 57 29.22 +52 09 22.8 X D04
2025-03-25 07:24:30 C 07 56 29.542 +51 54 39.46 V T05
2025-03-25 07:29:07 C 07 56 28.958 +51 54 30.85 V T05
2025-03-25 07:39:10 C 07 56 27.670 +51 54 12.13 V T05
2025-03-25 07:47:05 C 07 56 26.674 +51 53 57.41 V T05
2025-03-25 07:54:23 C 07 56 25.750 +51 53 43.87 V T05
2025-03-25 08:06:26 C 07 56 24.204 +51 53 21.34 V T05
2025-03-25 08:20:33 C 07 56 22.406 +51 52 54.88 V T05
2025-03-26 02:48:18 C 07 54 10.674 +51 18 33.37 V G96
2025-03-26 02:56:16 C 07 54 09.695 +51 18 18.43 V G96
2025-03-26 03:04:14 C 07 54 08.737 +51 18 03.64 V G96
2025-03-26 03:12:12 C 07 54 07.783 +51 17 48.77 V G96
2025-03-26 03:40:02 C 07 54 04.360 +51 16 56.53 V 703
2025-03-26 03:43:41 C 07 54 03.946 +51 16 49.26 V 703
2025-03-26 03:47:12 C 07 54 03.431 +51 16 42.31 V 703
2025-03-26 03:50:40 C 07 54 03.071 +51 16 36.41 V 703
2025-03-26 09:17:15 C 07 53 24.562 +51 06 22.86 V T08
2025-03-26 09:28:48 C 07 53 23.196 +51 06 01.01 V T08
2025-03-26 09:57:17 C 07 53 19.841 +51 05 06.40 V T08
2025-03-26 22:01:17 C 07 51 58.303 +50 42 15.41 Z C23
2025-03-26 22:38:13 C 07 51 54.089 +50 41 04.81 Z C23
2025-03-26 23:13:54 C 07 51 50.050 +50 39 56.20 Z C23
2025-03-27 07:41:06 C 07 50 54.346 +50 23 59.46 V T08
2025-03-27 07:52:30 C 07 50 53.050 +50 23 37.50 V T08
2025-03-27 08:07:02 C 07 50 51.415 +50 23 09.38 V T08
2025-03-27 21:29:38 C 07 49 25.555 +49 57 26.39 Z C23
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)