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
1989-10-04 23:35:59 A 00 40 05.21 +05 24 12.4 091
1989-10-04 23:57:29 A 00 40 03.37 +05 24 07.3 091
1989-10-05 01:28:59 A 00 39 50.17 +05 24 33.5 809
1989-10-05 01:43:00 A 00 39 48.09 +05 24 33.5 809
1989-10-05 10:54:28 A 00 38 27.30 +05 24 13.4 568
1989-10-06 05:49:59 A 00 35 37.45 +05 24 18.4 809
1989-10-06 06:04:00 A 00 35 35.26 +05 24 18.3 809
1989-10-06 06:18:00 A 00 35 33.04 +05 24 18.1 809
1989-10-06 10:36:40 A 00 34 53.88 +05 23 59.3 568
1989-10-06 15:34:30 A 00 34 07.43 +05 24 12.4 413
1989-10-06 15:39:31 A 00 34 06.64 +05 24 12.0 413
1989-10-06 15:44:30 A 00 34 05.88 +05 24 12.1 413
1989-10-07 02:12:59 A 00 32 28.18 +05 24 01.2 16.0 809
1989-10-07 02:26:59 A 00 32 25.83 +05 24 01.2 809
1989-10-07 02:41:00 A 00 32 23.54 +05 24 01.0 809
1989-10-08 04:10:59 A 00 28 12.19 +05 23 35.0 809
1989-10-08 04:25:00 A 00 28 09.81 +05 23 34.8 809
1989-10-08 04:45:59 A 00 28 06.14 +05 23 34.3 809
1989-10-08 23:58:59 A 00 24 49.18 +05 23 08.2 809
1989-10-09 00:06:59 A 00 24 47.81 +05 23 07.9 809
1989-10-09 00:14:59 A 00 24 46.45 +05 23 07.6 809
1989-10-10 00:05:30 A 00 20 29.02 +05 22 31.9 809
1989-10-10 00:09:30 A 00 20 28.26 +05 22 31.8 809
1989-10-10 00:13:29 A 00 20 27.51 +05 22 31.7 809
1989-10-10 00:39:29 A 00 20 22.64 +05 22 30.8 809
1989-10-10 00:46:29 A 00 20 21.31 +05 22 30.7 809
1989-10-10 00:53:29 A 00 20 20.00 +05 22 30.6 809
1989-10-11 01:13:29 A 00 15 43.30 +05 21 45.5 809
1989-10-11 01:17:30 A 00 15 42.54 +05 21 45.3 809
1989-10-11 01:21:29 A 00 15 41.79 +05 21 45.0 809
1989-10-12 01:04:29 A 00 10 58.70 +05 20 54.6 809
1989-10-12 01:09:29 A 00 10 57.67 +05 20 54.4 809
1989-10-12 01:14:30 A 00 10 56.60 +05 20 54.2 809
1989-10-12 01:27:29 A 00 10 53.88 +05 20 53.7 809
1989-10-12 01:32:30 A 00 10 52.88 +05 20 53.7 809
1989-10-13 04:55:44 A 00 05 07.16 +05 19 45.7 809
1989-10-13 05:01:44 A 00 05 05.84 +05 19 45.5 809
1989-10-13 05:28:29 A 00 04 59.92 +05 19 44.4 809
1989-10-29 10:57:12 A 22 05 41.06 +04 34 55.7 413
1989-10-29 11:02:19 A 22 05 39.01 +04 34 54.5 413
1989-10-29 11:07:09 A 22 05 37.07 +04 34 53.4 413
1989-11-01 03:14:05 A 21 39 43.34 +04 19 18.0 657
1992-07-08 09:35:48 23 13 12.98 -16 00 52.1 F 711
1995-08-02 10:57:31 C 21 52 46.06 -26 37 48.5 c 608
1995-08-02 11:59:47 C 21 52 43.26 -26 38 00.3 c 608
1996-08-07 00:38:08 C 01 42 32.85 +06 13 03.1 z 118
1996-08-07 00:51:38 C 01 42 33.39 +06 13 07.4 z 118
1996-08-10 01:34:58 C 01 45 26.80 +06 36 10.6 z 118
1996-08-10 01:39:27 C 01 45 26.96 +06 36 11.9 z 118
1996-08-12 12:26:14 C 01 47 43.86 +06 55 07.1 c 608
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)