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
2020-08-21 10:43:49 C 23 02 59.09 -16 35 35.6 V T05
2020-08-21 10:47:13 C 23 02 58.857 -16 35 37.20 U F51
2020-08-21 12:35:34 C 23 02 53.342 -16 36 08.37 U F51
2020-08-21 13:53:19 C 23 02 49.382 -16 36 30.65 U F51
2020-08-21 14:10:58 C 23 02 48.482 -16 36 35.64 U F51
2020-08-22 12:09:54 C 23 01 42.355 -16 42 56.07 U F52
2020-08-22 12:12:03 C 23 01 42.30 -16 42 56.7 V T08
2020-08-22 12:17:43 C 23 01 41.950 -16 42 58.31 U F52
2020-08-22 12:18:04 C 23 01 41.96 -16 42 58.4 V T08
2020-08-22 12:25:26 C 23 01 41.549 -16 43 00.57 U F52
2020-08-22 12:33:12 C 23 01 41.147 -16 43 02.76 U F52
2020-08-22 13:09:19 C 23 01 39.28 -16 43 13.0 V T08
2020-08-22 13:50:03 C 23 01 37.18 -16 43 24.6 V T08
2020-08-23 10:46:08 C 23 00 33.304 -16 49 26.78 U F51
2020-08-23 11:07:03 C 23 00 32.203 -16 49 32.83 U F51
2020-08-23 11:28:02 C 23 00 31.098 -16 49 38.88 U F51
2020-08-23 16:12:37 C 23 00 16.50 -16 51 01.0 q D29
2020-08-23 16:16:26 C 23 00 16.32 -16 51 02.3 q D29
2020-08-23 16:32:58 C 23 00 15.43 -16 51 07.1 q D29
2020-08-23 16:36:48 C 23 00 15.25 -16 51 07.9 q D29
2020-08-23 16:53:21 C 23 00 14.35 -16 51 12.8 q D29
2020-08-23 16:57:10 C 23 00 14.15 -16 51 14.2 q D29
2020-09-07 10:06:08 C 22 40 30.53 -18 27 07.8 V T08
2020-09-07 10:55:18 C 22 40 27.57 -18 27 19.8 V T08
2020-09-07 10:59:57 C 22 40 27.32 -18 27 21.0 V T08
2020-09-07 11:07:58 C 22 40 26.88 -18 27 22.0 V T08
2020-09-07 14:00:36 C 22 40 16.94 -18 28 05.1 q D29
2020-09-07 14:19:22 C 22 40 15.80 -18 28 09.3 q D29
2020-09-07 14:38:10 C 22 40 14.71 -18 28 15.0 q D29
2020-09-13 10:02:20 C 22 32 03.43 -18 59 51.3 V T05
2020-09-13 10:07:43 C 22 32 03.01 -18 59 51.3 V T05
2020-09-13 10:53:14 C 22 32 00.39 -19 00 01.5 V T05
2020-09-13 11:04:34 C 22 31 59.64 -19 00 03.9 V T05
2020-09-15 09:09:31 C 22 29 18.52 -19 09 22.1 V T08
2020-09-15 09:14:50 C 22 29 18.20 -19 09 23.5 V T08
2020-09-15 09:24:48 C 22 29 17.61 -19 09 26.0 V T08
2020-09-15 09:42:02 C 22 29 16.59 -19 09 28.8 V T08
2020-09-17 09:49:16 C 22 26 29.80 -19 18 32.1 V T05
2020-09-17 09:54:33 C 22 26 29.50 -19 18 32.5 V T05
2020-09-17 10:04:33 C 22 26 29.00 -19 18 34.3 V T05
2020-09-17 10:21:59 C 22 26 27.88 -19 18 37.1 V T05
2020-09-18 08:36:12 C 22 25 11.728 -19 22 33.92 U F51
2020-09-18 08:51:48 C 22 25 10.818 -19 22 36.65 U F51
2020-09-18 09:14:27 C 22 25 09.497 -19 22 40.55 U F51
2020-09-18 09:30:04 C 22 25 08.588 -19 22 43.24 U F51
2020-09-23 07:47:39 C 22 18 33.48 -19 40 56.7 V T08
2020-09-23 07:50:18 C 22 18 33.34 -19 40 57.5 V T08
2020-09-23 07:54:17 C 22 18 33.10 -19 40 57.5 V T08
2020-09-23 08:02:55 C 22 18 32.61 -19 40 58.5 V T08
2020-10-06 04:17:42 C 22 03 32.47 -20 06 00.0 V 703
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)