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
1954-09-03 09:08:00 23 59 23.44 -09 09 11.1 675
1954-09-03 09:42:59 23 59 21.31 -09 09 23.0 675
1982-07-20 18:45:59 A 01 03 08.44 +00 36 30.3 19.0 413
1982-07-20 19:45:59 A 01 03 09.62 +00 36 37.4 413
1982-10-11 03:02:59 A 23 54 53.81 -00 16 24.7 675
1982-10-11 03:42:59 A 23 54 47.65 -00 16 35.7 675
1982-10-11 04:02:59 A 23 54 44.50 -00 16 41.2 675
1982-10-12 03:08:59 A 23 50 54.40 -00 23 28.7 15.7 675
1982-10-12 04:09:00 A 23 50 44.45 -00 23 46.1 675
1982-10-12 07:20:00 A 23 50 11.10 -00 24 43.2 675
1982-10-12 07:49:59 A 23 50 06.28 -00 24 50.3 675
1982-10-13 02:51:00 A 23 46 52.94 -00 30 29.3 675
1982-10-13 03:20:59 A 23 46 47.97 -00 30 37.0 675
1982-10-13 06:40:00 A 23 46 12.70 -00 31 39.4 15.8 688
1982-10-13 07:07:59 A 23 46 07.68 -00 31 47.0 688
1982-10-13 08:23:59 A 23 45 54.00 -00 32 09.5 675
1982-10-13 08:44:00 A 23 45 51.08 -00 32 13.7 675
1982-10-16 10:23:28 A 23 32 39.22 -00 53 37.7 15.7 474
1982-10-16 10:56:48 A 23 32 33.02 -00 53 47.1 474
1982-10-16 15:27:30 A 23 31 42.1 -00 55 30 16.0 372
1982-10-16 15:38:30 A 23 31 39.9 -00 55 33 372
1982-10-17 04:07:00 A 23 29 21.13 -00 59 15.4 15.5 688
1982-10-17 04:30:00 A 23 29 16.58 -00 59 20.5 675
1982-10-17 04:32:59 A 23 29 16.06 -00 59 24.0 688
1982-10-17 05:03:59 A 23 29 09.62 -00 59 32.5 675
1982-10-17 05:06:59 A 23 29 09.55 -00 59 32.1 675
1982-10-17 20:39:59 A 23 26 12.93 -01 04 05.6 15.0 489
1982-10-17 20:50:00 A 23 26 11.36 -01 04 11.8 489
1982-10-17 20:57:59 A 23 26 09.25 -01 04 12.1 489
1982-10-17 21:08:00 A 23 26 08.27 -01 04 18.5 489
1982-10-18 13:47:59 A 23 22 55.90 -01 08 37.6 15.0 323
1982-10-19 03:03:59 A 23 20 22.44 -01 12 45.2 675
1982-10-19 11:20:05 A 23 18 44.61 -01 14 40.5 474
1982-10-19 11:39:55 A 23 18 40.70 -01 14 45.7 474
1982-10-19 14:09:29 A 23 18 11.48 -01 15 31.6 15.0 323
1982-10-20 01:08:05 A 23 16 02.26 -01 19 01.5 A 801
1982-10-20 03:11:00 A 23 15 38.31 -01 19 33.8 675
1982-10-20 13:37:30 A 23 13 33.34 -01 22 05.4 15.0 323
1982-10-21 04:05:00 A 23 10 40.27 -01 26 28.6 15.5 688
1982-10-21 04:32:00 A 23 10 34.90 -01 26 34.3 688
1982-10-22 02:09:46 A 23 06 13.23 -01 32 20.5 695
1982-10-22 03:43:12 A 23 05 52.87 -01 32 50.2 A 801
1982-10-22 11:41:26 A 23 04 15.71 -01 34 27.6 413
1982-10-22 11:46:26 A 23 04 14.72 -01 34 28.6 413
1982-10-23 03:05:29 A 23 01 06.90 -01 38 50.6 695
1982-10-24 03:37:28 A 22 56 01.83 -01 45 01.2 695
1982-10-24 06:17:00 A 22 55 28.01 -01 45 42.4 16.0 688
1982-10-24 06:44:00 A 22 55 22.22 -01 45 49.3 688
1982-11-07 02:22:31 A 21 43 35.42 -02 38 14.0 675
1982-11-07 17:21:54 A 21 40 17.46 -02 39 12.2 15.0 046
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)