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
2003-09-28 22:53:26 C 03 47 01.91 +26 58 03.4 d 118
2003-09-30 16:09:50 C 03 56 01.02 +28 34 04.5 355
2003-09-30 16:12:00 C 03 56 01.54 +28 34 09.7 355
2003-09-30 16:14:50 C 03 56 02.16 +28 34 16.5 355
2003-09-30 16:17:10 C 03 56 02.70 +28 34 22.3 355
2003-09-30 18:01:49 C 03 56 26.62 +28 38 40.5 m 379
2003-09-30 18:03:52 C 03 56 27.08 +28 38 45.6 m 379
2003-09-30 18:07:56 C 03 56 28.03 +28 38 55.6 m 379
2003-09-30 18:09:57 C 03 56 28.49 +28 39 00.6 m 379
2003-10-02 07:42:16 C 04 05 58.61 +30 15 54.9 c 730
2003-10-02 07:56:38 C 04 06 02.41 +30 16 34.0 c 730
2003-10-02 08:13:13 C 04 06 06.84 +30 17 19.8 c 730
2003-10-02 22:35:48 C 04 10 08.57 +30 56 58.4 d 118
2003-10-02 22:37:50 C 04 10 09.15 +30 57 04.0 d 118
2003-10-02 22:41:55 C 04 10 10.31 +30 57 15.6 d 118
2003-10-02 22:42:55 C 04 10 10.60 +30 57 18.5 d 118
2003-10-02 22:47:00 C 04 10 11.78 +30 57 30.3 d 118
2003-10-04 16:44:30 C 04 23 24.08 +33 02 07.9 m 379
2003-10-04 16:59:39 C 04 23 29.25 +33 02 56.5 m 379
2003-10-04 23:52:20 C 04 25 54.00 +33 24 21.6 c J94
2003-10-05 00:04:35 C 04 25 58.31 +33 25 01.0 c J94
2003-10-05 00:12:55 C 04 26 01.23 +33 25 27.8 c J94
2003-10-06 06:47:58 C 04 37 41.64 +35 05 59.7 c 750
2003-10-06 06:49:12 C 04 37 42.27 +35 06 01.7 c 730
2003-10-06 06:51:28 C 04 37 43.15 +35 06 09.0 c 730
2003-10-06 06:54:36 C 04 37 44.41 +35 06 20.1 c 730
2003-10-06 06:55:48 C 04 37 44.80 +35 06 26.6 c 750
2003-10-06 06:56:21 C 04 37 45.06 +35 06 26.8 c 730
2003-10-06 06:56:52 C 04 37 45.29 +35 06 27.4 c 730
2003-10-06 06:58:54 C 04 37 46.04 +35 06 37.2 c 750
2003-10-06 06:59:53 C 04 37 46.54 +35 06 38.3 c 730
2003-10-06 07:01:44 C 04 37 47.17 +35 06 46.8 c 750
2003-10-06 07:07:01 C 04 37 49.32 +35 07 05.0 c 750
2003-10-06 08:43:15 C 04 38 28.90 +35 12 40.3 15.5 c 704
2003-10-06 09:02:26 C 04 38 36.79 +35 13 45.9 15.6 c 704
2003-10-06 09:22:07 C 04 38 44.80 +35 14 53.4 15.8 c 704
2003-10-09 15:17:00 C 05 18 07.72 +39 57 44.2 355
2003-10-09 15:18:26 C 05 18 08.58 +39 57 49.9 355
2003-10-09 15:41:05 C 05 18 22.26 +39 59 16.4 355
2003-10-09 17:35:53 C 05 19 31.98 +40 06 36.8 m 379
2003-10-09 17:37:56 C 05 19 33.20 +40 06 44.7 m 379
2003-10-09 23:33:58 C 05 23 18.68 +40 28 57.7 r 941
2003-10-09 23:35:07 C 05 23 19.41 +40 29 02.2 r 941
2003-10-09 23:35:53 C 05 23 19.90 +40 29 05.3 r 941
2003-10-09 23:36:16 C 05 23 20.14 +40 29 06.8 r 941
2003-10-09 23:37:03 C 05 23 20.64 +40 29 09.6 r 941
2003-10-09 23:37:26 C 05 23 20.88 +40 29 11.1 r 941
2003-10-13 08:24:16 C 06 27 13.68 +45 16 33.5 14.9 c 704
2003-10-13 08:43:15 C 06 27 31.76 +45 17 33.3 15.0 c 704
2003-10-13 09:01:46 C 06 27 49.30 +45 18 30.5 14.9 c 704
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)