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
2025-03-19 09:46:22 C 08 16 54.540 +56 00 16.49 V T08
2025-03-19 09:51:45 C 08 16 53.621 +56 00 07.81 V T08
2025-03-19 10:01:44 C 08 16 51.852 +55 59 51.36 V T08
2025-03-20 03:45:06 C 08 13 58.526 +55 31 04.62 V 703
2025-03-20 03:48:17 C 08 13 58.033 +55 30 59.15 V 703
2025-03-20 03:51:27 C 08 13 57.464 +55 30 54.43 V 703
2025-03-20 03:54:38 C 08 13 56.942 +55 30 49.14 V 703
2025-03-20 18:21:49 C 08 11 39.29 +55 06 50.3 X C40
2025-03-20 18:24:14 C 08 11 38.90 +55 06 46.4 X C40
2025-03-20 18:26:39 C 08 11 38.48 +55 06 42.5 X C40
2025-03-20 18:29:03 C 08 11 38.11 +55 06 38.5 X C40
2025-03-20 18:31:27 C 08 11 37.74 +55 06 34.2 X C40
2025-03-20 18:33:52 C 08 11 37.36 +55 06 30.5 X C40
2025-03-20 18:36:17 C 08 11 36.96 +55 06 26.2 X C40
2025-03-20 18:38:42 C 08 11 36.63 +55 06 21.9 X C40
2025-03-20 18:41:00 C 08 11 36.17 +55 06 18.4 X C40
2025-03-20 18:43:13 C 08 11 35.81 +55 06 14.5 X C40
2025-03-20 18:45:26 C 08 11 35.48 +55 06 10.4 X C40
2025-03-20 18:47:39 C 08 11 35.09 +55 06 06.6 X C40
2025-03-21 07:58:32 C 08 09 33.235 +54 44 00.20 V T05
2025-03-21 08:03:07 C 08 09 32.518 +54 43 52.46 V T05
2025-03-21 08:11:58 C 08 09 31.104 +54 43 37.31 V T05
2025-03-21 08:27:46 C 08 09 28.637 +54 43 10.34 V T05
2025-03-21 19:09:14 B 08 07 53.143 +54 24 50.76 V L65
2025-03-21 19:19:43 B 08 07 51.547 +54 24 32.62 V L65
2025-03-21 19:30:12 B 08 07 49.961 +54 24 14.69 V L65
2025-03-22 04:39:11 C 08 06 29.110 +54 08 32.24 V 703
2025-03-22 04:42:21 C 08 06 28.627 +54 08 26.77 V 703
2025-03-22 04:45:31 C 08 06 28.152 +54 08 21.16 V 703
2025-03-22 04:48:41 C 08 06 27.680 +54 08 15.58 V 703
2025-03-23 01:03:06 C 08 03 35.77 +53 32 51.5 V W46
2025-03-23 01:14:39 C 08 03 34.10 +53 32 31.1 V W46
2025-03-23 01:25:17 C 08 03 32.59 +53 32 12.3 V W46
2025-03-23 08:18:16 C 08 02 35.177 +53 20 02.36 V T08
2025-03-23 08:25:45 C 08 02 34.135 +53 19 49.01 V T08
2025-03-23 08:31:42 C 08 02 33.286 +53 19 38.24 V T08
2025-03-23 08:46:36 C 08 02 31.183 +53 19 11.39 V T08
2025-03-23 19:29:26 C 08 01 04.79 +52 59 59.1 X C40
2025-03-23 19:32:44 C 08 01 04.32 +52 59 52.9 X C40
2025-03-23 19:36:02 C 08 01 03.89 +52 59 47.2 X C40
2025-03-23 19:39:21 C 08 01 03.42 +52 59 41.2 X C40
2025-03-23 19:42:29 C 08 01 03.03 +52 59 35.5 X C40
2025-03-23 19:45:25 C 08 01 02.62 +52 59 30.1 X C40
2025-03-23 19:48:21 C 08 01 02.21 +52 59 24.4 X C40
2025-03-23 19:51:18 C 08 01 01.80 +52 59 19.4 X C40
2025-03-23 19:54:14 C 08 01 01.39 +52 59 14.1 X C40
2025-03-23 19:57:11 C 08 01 01.01 +52 59 08.6 X C40
2025-03-23 20:00:06 C 08 01 00.62 +52 59 03.3 X C40
2025-03-23 20:03:03 C 08 01 00.20 +52 58 57.8 X C40
2025-03-23 21:06:48 C 08 00 51.55 +52 57 02.3 X D04
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)