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
2003-09-21 10:48:12 C 03 18 30.68 +21 36 54.4 o 699
2003-09-21 11:07:23 C 03 18 32.99 +21 37 22.0 o 699
2003-09-21 11:26:35 C 03 18 35.31 +21 37 49.6 o 699
2003-09-21 11:45:48 C 03 18 37.63 +21 38 17.0 o 699
2003-09-21 22:33:46 C 03 20 01.00 +21 53 55.2 c J93
2003-09-21 22:35:49 C 03 20 01.27 +21 53 58.5 c J93
2003-09-21 23:17:30 C 03 20 06.62 +21 55 00.8 c J93
2003-09-21 23:19:33 C 03 20 06.78 +21 55 04.2 c J93
2003-09-21 23:23:39 C 03 20 07.37 +21 55 10.0 c J93
2003-09-22 00:06:53 C 03 20 12.65 +21 56 16.3 d 118
2003-09-22 00:11:38 C 03 20 13.25 +21 56 23.6 d 118
2003-09-22 00:17:33 C 03 20 14.00 +21 56 32.3 d 118
2003-09-22 00:22:16 C 03 20 14.60 +21 56 39.4 d 118
2003-09-22 00:29:24 C 03 20 15.47 +21 56 50.0 d 118
2003-09-22 08:37:18 C 03 21 19.17 +22 09 03.9 15.3 c 704
2003-09-22 08:54:52 C 03 21 21.40 +22 09 30.5 15.3 c 704
2003-09-22 09:12:29 C 03 21 23.64 +22 09 57.5 15.4 c 704
2003-09-22 09:30:31 C 03 21 25.94 +22 10 24.7 15.2 c 704
2003-09-22 09:48:23 C 03 21 28.21 +22 10 51.8 15.4 c 704
2003-09-23 01:24:36 C 03 23 33.84 +22 34 48.8 d 118
2003-09-23 01:27:00 C 03 23 34.17 +22 34 52.6 d 118
2003-09-23 01:34:09 C 03 23 35.10 +22 35 03.9 d 118
2003-09-23 01:36:33 C 03 23 35.44 +22 35 07.7 d 118
2003-09-23 06:04:58 C 03 24 12.97 +22 42 09.7 c 730
2003-09-23 06:09:14 C 03 24 13.57 +22 42 16.0 c 730
2003-09-23 06:11:19 C 03 24 13.95 +22 42 20.9 c 730
2003-09-23 06:13:25 C 03 24 13.91 +22 42 20.9 c 730
2003-09-26 02:12:01 C 03 34 28.17 +24 39 02.0 d 118
2003-09-26 02:15:31 C 03 34 28.74 +24 39 08.7 d 118
2003-09-26 02:24:55 C 03 34 30.23 +24 39 26.2 d 118
2003-09-26 02:34:18 C 03 34 31.75 +24 39 43.5 d 118
2003-09-26 02:40:19 C 03 34 32.70 +24 39 54.8 d 118
2003-09-27 08:41:02 C 03 39 43.69 +25 37 53.7 15.6 c 704
2003-09-27 08:59:43 C 03 39 46.97 +25 38 31.3 15.8 c 704
2003-09-27 09:18:44 C 03 39 50.28 +25 39 09.9 15.8 c 704
2003-09-27 09:37:44 C 03 39 53.59 +25 39 47.7 17.0 c 704
2003-09-27 09:57:39 C 03 39 57.06 +25 40 28.1 16.1 c 704
2003-09-27 18:25:50 C 03 41 29.80 +25 57 39.8 m 379
2003-09-27 18:27:00 C 03 41 29.98 +25 57 41.8 m 379
2003-09-27 18:29:18 C 03 41 30.38 +25 57 46.8 m 379
2003-09-27 18:30:27 C 03 41 30.58 +25 57 49.3 m 379
2003-09-27 22:55:44 C 03 42 21.47 +26 06 49.0 r J87
2003-09-27 22:56:47 C 03 42 21.68 +26 06 51.3 r J87
2003-09-27 22:57:50 C 03 42 21.85 +26 06 53.4 r J87
2003-09-27 22:58:54 C 03 42 22.02 +26 06 55.4 r J87
2003-09-27 22:59:57 C 03 42 22.22 +26 06 57.9 r J87
2003-09-28 22:27:25 C 03 46 56.70 +26 57 05.2 d 118
2003-09-28 22:28:36 C 03 46 56.94 +26 57 07.9 d 118
2003-09-28 22:33:19 C 03 46 57.87 +26 57 18.5 d 118
2003-09-28 22:49:54 C 03 47 01.19 +26 57 55.4 d 118
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)