4197 Morpheus (1982 TA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7724910516 ± 1.01e-08
Semi-major axis (a)2.2954661269 AU ± 1.11e-09
Inclination (i)12.60329974° ± 2.88e-06
Long. of Asc. Node (Ω)6.98204038° ± 5.96e-06
Arg. of Perihelion (ω)122.58203482° ± 6.09e-06
Mean Anomaly (M)110.46507819° ± 1.39e-06
Mean Motion (n)0.2834039790°/day ± 2.06e-10
Perihelion dist (q)0.52223908 AU ± 2.32e-08
Aphelion dist (Q)4.06869317 AU ± 2.33e-08
Orbital Period3.47781385 yr ± 2.53e-09
Physical Parameters
H (abs. magnitude)14.97
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.322″
Uncertainty0
Orbit TypeApollo
MOID0.098326 AU
Observations Used1179
Radar Obs Used6
Oppositions30
Arc Total1954-2025
First Observation Used1954-09-03
Last Observation Used2025-06-30
Observations (1276)
Date Type RA Dec Mag Band Observatory
2010-09-05 02:05:47 C 02 58 09.80 +18 06 21.6 r J75
2010-09-05 02:23:01 C 02 58 11.40 +18 06 38.1 r J75
2010-09-05 02:40:13 C 02 58 13.02 +18 06 53.4 r J75
2010-09-07 03:09:26 C 03 03 00.02 +18 52 54.1 r J75
2010-09-07 03:27:43 C 03 03 01.79 +18 53 11.5 r J75
2010-09-07 03:45:56 C 03 03 03.62 +18 53 29.7 r J75
2010-09-08 08:52:34 C 03 06 04.95 +19 22 41.1 16.6 c 704
2010-09-08 09:09:19 C 03 06 06.71 +19 22 58.3 16.8 c 704
2010-09-08 09:15:14 C 03 06 07.32 +19 23 04.2 u H15
2010-09-08 09:26:09 C 03 06 08.46 +19 23 15.7 17.0 c 704
2010-09-08 09:43:10 C 03 06 10.17 +19 23 33.2 16.9 c 704
2010-09-08 09:44:09 C 03 06 10.29 +19 23 34.0 u H15
2010-09-08 09:59:58 C 03 06 11.93 +19 23 50.5 16.9 c 704
2010-09-08 10:09:34 C 03 06 12.90 +19 24 00.2 u H15
2010-09-08 10:36:13 C 03 06 15.63 +19 24 27.6 u H15
2010-09-09 01:28:43 C 03 07 51.34 +19 39 50.4 v 204
2010-09-09 01:54:00 C 03 07 54.02 +19 40 17.1 v 204
2010-09-09 02:35:36 C 03 07 58.41 +19 41 01.0 v 204
2010-09-11 11:17:24 C 03 14 22.20 +20 43 14.6 r 703
2010-09-11 11:21:32 C 03 14 22.66 +20 43 19.4 r 703
2010-09-11 11:25:39 C 03 14 23.13 +20 43 24.0 r 703
2010-09-11 11:29:43 C 03 14 23.60 +20 43 28.6 r 703
2010-09-11 23:10:20 C 03 15 47.69 +20 56 54.4 w I99
2010-09-11 23:14:23 C 03 15 48.14 +20 56 59.4 w I99
2010-09-11 23:19:16 C 03 15 48.74 +20 57 05.4 w I99
2010-09-12 02:28:07 C 03 16 10.85 +21 00 47.5 u 160
2010-09-12 02:30:24 C 03 16 11.13 +21 00 50.2 u 160
2010-09-12 02:32:40 C 03 16 11.41 +21 00 53.1 u 160
2010-09-13 02:23:59 C 03 19 07.62 +21 29 25.1 u 160
2010-09-13 02:26:16 C 03 19 07.90 +21 29 27.9 u 160
2010-09-13 02:28:32 C 03 19 08.17 +21 29 30.8 u 160
2010-09-15 08:14:35 C 03 26 13.65 +22 38 08.2 16.6 c 704
2010-09-15 08:32:06 C 03 26 16.03 +22 38 32.2 16.7 c 704
2010-09-15 08:49:39 C 03 26 18.42 +22 38 55.6 16.7 c 704
2010-09-15 09:07:15 C 03 26 20.76 +22 39 19.2 16.6 c 704
2010-09-15 09:24:50 C 03 26 23.14 +22 39 42.6 16.7 c 704
2010-09-16 09:53:56 C 03 29 51.63 +23 13 08.8 15.6 c 704
2010-09-16 10:29:12 C 03 29 56.62 +23 13 58.1 16.3 c 704
2010-09-16 10:35:17 C 03 29 57.28 +23 14 06.6 u H47
2010-09-16 10:46:08 C 03 29 58.81 +23 14 21.7 u H47
2010-09-16 10:46:53 C 03 29 59.12 +23 14 23.0 16.4 c 704
2010-09-16 10:56:08 C 03 30 00.26 +23 14 35.7 u H47
2010-09-16 11:04:28 C 03 30 01.61 +23 14 47.2 16.2 c 704
2010-09-18 10:01:44 C 03 37 13.28 +24 23 12.6 16.0 c 704
2010-09-18 10:20:15 C 03 37 16.15 +24 23 40.8 16.5 c 704
2010-09-18 10:38:32 C 03 37 19.05 +24 24 08.5 16.2 c 704
2010-09-18 10:55:04 C 03 37 21.32 +24 24 33.7 u H47
2010-09-18 10:56:41 C 03 37 21.89 +24 24 36.1 16.2 c 704
2010-09-18 11:01:33 C 03 37 22.35 +24 24 43.4 u H47
2010-09-18 11:06:43 C 03 37 23.15 +24 24 51.1 u H47
Radar Observations (12)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1996-10-23 07:10:00 488339 5 Hz 8510 -14 -14
1996-10-23 11:10:00 89601609 13 us 8510 -14 -14
1996-10-23.298611 48833900 500 Hz 8510 253 253
1996-10-23.465278 8960160900 13000 us 8510 253 253
1996-10-24 06:50:00 86425022 13 us 8510 -14 -14
1996-10-24 08:30:00 275982 2 Hz 8510 -14 -14
1996-10-24 10:20:00 86017157 13 us 8510 -14 -14
1996-10-24.284722 8642502200 13000 us 8510 253 253
1996-10-24.354167 27598200 200 Hz 8510 253 253
1996-10-24.430556 8601715700 13000 us 8510 253 253
1996-10-28 17:00:00 94450116 13 us 8510 -14 -14
1996-10-28.708333 9445011600 13000 us 8510 253 253
Station codes
-14 DSS-14 Goldstone (70-m)