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
1996-10-12 03:29:59 C 02 01 49.05 +28 24 02.0 z 826
1996-10-12 03:30:00 C 02 01 49.15 +28 24 01.1 z 819
1996-10-12 07:36:23 C 02 01 24.70 +28 40 21.4 i 711
1996-10-12 07:40:15 C 02 01 24.29 +28 40 36.6 i 711
1996-10-12 21:27:59 02 00 02.73 +29 37 02.2 m 026
1996-10-12 21:38:00 02 00 01.17 +29 37 42.2 m 026
1996-10-12 22:37:26 C 01 59 54.11 +29 42 00.2 z 118
1996-10-12 22:42:47 C 01 59 53.49 +29 42 23.1 z 118
1996-10-12 22:48:20 C 01 59 52.84 +29 42 47.0 z 118
1996-10-15 00:57:25 C 01 53 17.77 +33 49 02.9 z 113
1996-10-15 00:59:49 C 01 53 17.29 +33 49 15.6 z 113
1996-10-15 01:02:52 C 01 53 16.79 +33 49 33.1 z 113
1996-10-15 01:05:46 C 01 53 16.33 +33 49 49.5 z 113
1996-10-15 01:08:55 C 01 53 15.86 +33 50 05.6 z 113
1996-10-15 01:11:29 C 01 53 15.17 +33 50 21.1 z 113
1996-10-15 01:14:21 C 01 53 14.95 +33 50 37.7 z 113
1996-10-17 01:45:00 C 01 43 34.96 +39 06 15.0 z 819
1996-10-17 01:59:59 C 01 43 31.03 +39 08 08.7 z 819
1996-10-17 02:15:00 C 01 43 27.08 +39 10 02.6 z 819
1996-10-17 02:30:00 C 01 43 23.11 +39 11 56.7 z 819
1996-10-17 02:44:58 C 01 43 19.12 +39 13 50.5 z 819
1996-10-17 03:00:00 C 01 43 15.12 +39 15 44.5 z 819
1996-10-17 03:15:00 C 01 43 11.08 +39 17 38.7 z 819
1996-10-17 03:29:59 C 01 43 07.05 +39 19 33.2 z 819
1996-10-17 03:45:00 C 01 43 03.00 +39 21 27.4 z 819
1996-10-18 02:30:00 C 01 36 28.18 +42 26 45.1 z 826
1996-10-18 02:44:59 C 01 36 22.99 +42 28 54.2 z 827
1996-10-18 02:59:59 C 01 36 17.81 +42 31 09.6 z 826
1996-10-18 03:00:00 C 01 36 17.83 +42 31 06.3 z 827
1996-10-18 03:15:00 C 01 36 12.59 +42 33 22.2 z 826
1996-10-18 03:15:00 C 01 36 12.64 +42 33 18.5 z 827
1996-10-18 03:29:59 C 01 36 07.47 +42 35 34.2 z 826
1996-10-19 01:08:36 C 01 27 50.52 +45 58 46.1 z 121
1996-10-19 01:18:52 C 01 27 45.96 +46 00 27.3 z 121
1996-10-19 02:30:00 C 01 27 21.03 +46 12 43.0 z 826
1996-10-19 02:30:00 C 01 27 20.99 +46 12 39.9 z 827
1996-10-19 02:44:59 C 01 27 14.19 +46 15 16.0 z 826
1996-10-19 02:44:59 C 01 27 14.14 +46 15 13.1 z 827
1996-10-19 03:00:00 C 01 27 07.25 +46 17 49.2 z 826
1996-10-19 03:00:00 C 01 27 07.20 +46 17 46.0 z 827
1996-10-19 03:15:00 C 01 27 00.31 +46 20 22.7 z 826
1996-10-19 03:15:00 C 01 27 00.26 +46 20 19.4 z 827
1996-10-19 03:29:59 C 01 26 53.35 +46 22 55.6 z 826
1996-10-19 03:29:59 C 01 26 53.29 +46 22 52.5 z 827
1996-10-19 21:45:30 C 01 17 39.37 +49 39 36.5 z 107
1996-10-19 21:54:05 C 01 17 34.22 +49 41 14.2 z 107
1996-10-19 21:57:15 C 01 17 32.33 +49 41 50.4 z 107
1996-10-19 22:02:00 C 01 17 29.32 +49 42 47.5 z 107
1996-10-20 01:44:58 C 01 15 19.69 +50 25 18.3 z 827
1996-10-20 01:45:16 C 01 15 11.75 +50 25 13.4 12.6 z 629
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)