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
1982-11-07 17:32:24 A 21 40 15.71 -02 39 12.2 046
1982-11-10 23:33:51 A 21 23 05.74 -02 41 47.5 A 801
1982-11-12 03:27:59 A 21 16 56.62 -02 41 56.0 675
1982-11-12 04:12:00 A 21 16 46.90 -02 41 59.3 675
1982-11-15 01:52:00 A 21 01 24.17 -02 41 05.5 16.5 688
1982-11-15 02:21:00 A 21 01 17.80 -02 41 05.7 688
1982-11-15 10:05:51 A 20 59 33.78 -02 40 20.0 474
1982-11-15 10:28:00 A 20 59 28.80 -02 40 18.7 474
1983-04-16 16:10:10 A 19 43 49.53 -35 46 15.3 474
1983-04-16 16:47:00 A 19 43 49.78 -35 46 29.2 474
1983-05-22 15:48:11 A 19 16 50.14 -41 45 08.3 474
1983-05-22 16:29:32 A 19 16 47.02 -41 45 24.5 474
1983-06-12 16:42:31 A 18 31 13.68 -43 53 31.5 474
1983-06-12 17:53:12 A 18 31 06.74 -43 53 37.0 474
1985-09-20 06:15:40 A 21 58 34.05 -23 09 06.2 B 691
1985-09-20 06:25:39 A 21 58 33.55 -23 09 07.4 B 691
1985-09-20 06:59:30 A 21 58 31.90 -23 09 11.1 B 691
1985-09-21 05:34:45 A 21 57 30.19 -23 11 06.2 B 691
1985-09-21 05:43:07 A 21 57 29.80 -23 11 06.6 B 691
1985-09-21 06:12:53 A 21 57 28.46 -23 11 08.6 B 691
1985-09-23 06:00:59 A 21 55 20.89 -23 14 44.5 675
1985-09-23 06:15:23 A 21 55 20.22 -23 14 45.7 675
1985-09-24 07:14:59 A 21 54 15.32 -23 16 21.4 675
1985-09-24 07:25:40 A 21 54 14.82 -23 16 25.4 675
1989-09-05 10:30:14 A 01 27 04.64 +04 50 46.9 16.0 675
1989-09-05 11:14:29 A 01 27 03.78 +04 50 50.5 675
1989-09-07 09:28:15 A 01 26 14.11 +04 55 11.4 675
1989-09-21 08:32:00 A 01 12 45.84 +05 18 02.8 568
1989-09-21 12:21:29 A 01 12 30.21 +05 18 12.9 568
1989-09-22 07:09:59 A 01 11 15.64 +05 19 02.2 568
1989-09-22 10:23:39 A 01 11 01.72 +05 19 10.1 568
1989-09-25 06:02:19 A 01 05 54.38 +05 21 26.2 801
1989-09-28 06:21:29 A 00 59 22.18 +05 23 13.4 A 801
1989-09-28 06:54:12 A 00 59 18.83 +05 23 14.3 A 801
1989-10-01 05:12:14 A 00 51 46.30 +05 24 34.2 809
1989-10-01 05:48:47 A 00 51 41.94 +05 24 33.0 809
1989-10-01 06:28:12 A 00 51 37.25 +05 24 32.8 809
1989-10-01 07:21:05 A 00 51 30.85 +05 24 31.9 809
1989-10-01 08:17:13 A 00 51 24.10 +05 24 31.1 809
1989-10-02 02:15:59 A 00 49 16.38 +05 24 38.5 807
1989-10-02 04:55:59 A 00 48 56.02 +05 24 38.6 16.5 809
1989-10-02 05:14:29 A 00 48 53.68 +05 24 38.6 809
1989-10-02 05:33:29 A 00 48 51.28 +05 24 38.7 809
1989-10-03 04:32:59 A 00 45 57.16 +05 24 41.7 809
1989-10-03 04:46:59 A 00 45 55.26 +05 24 41.8 809
1989-10-03 05:01:00 A 00 45 53.36 +05 24 41.9 809
1989-10-03 06:18:00 A 00 45 43.00 +05 24 42.1 809
1989-10-03 06:33:59 A 00 45 40.83 +05 24 42.1 809
1989-10-03 06:49:59 A 00 45 38.66 +05 24 42.5 809
1989-10-04 02:05:00 A 00 43 06.21 +05 24 41.2 807
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)