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
2007-08-09 09:07:50 C 12 58 28.52 -16 06 27.1 r E12
2007-08-09 09:17:05 C 12 58 29.89 -16 06 36.9 r E12
2007-08-14 08:53:27 C 13 16 25.42 -18 06 23.0 r E12
2007-08-14 09:00:50 C 13 16 26.50 -18 06 29.6 r E12
2007-08-14 09:08:11 C 13 16 27.51 -18 06 36.6 r E12
2007-08-14 09:15:30 C 13 16 28.59 -18 06 44.1 r E12
2010-07-17 08:24:05 S 01 36 51.38 +06 44 19.0 L C51
2010-07-17 11:34:36 S 01 37 02.30 +06 45 39.5 L C51
2010-07-17 17:55:39 S 01 37 24.09 +06 48 20.3 L C51
2010-07-17 22:41:19 S 01 37 40.46 +06 50 20.4 L C51
2010-07-18 00:16:40 S 01 37 45.94 +06 51 00.9 L C51
2010-07-18 01:51:50 S 01 37 51.38 +06 51 41.1 L C51
2010-07-18 03:27:00 S 01 37 56.82 +06 52 20.7 L C51
2010-07-18 03:27:11 S 01 37 56.84 +06 52 21.3 L C51
2010-07-18 05:02:21 S 01 38 02.31 +06 53 01.5 L C51
2010-07-18 06:37:32 S 01 38 07.76 +06 53 41.8 L C51
2010-07-18 08:12:52 S 01 38 13.22 +06 54 22.0 L C51
2010-07-18 11:23:23 S 01 38 24.18 +06 55 42.8 L C51
2010-07-18 14:33:55 S 01 38 35.10 +06 57 02.7 L C51
2010-07-18 17:44:26 S 01 38 46.05 +06 58 24.6 L C51
2010-07-18 20:54:57 S 01 38 57.00 +06 59 45.3 L C51
2010-08-08 09:24:53 C 02 08 26.42 +10 46 02.4 18.2 c 704
2010-08-08 09:41:43 C 02 08 27.45 +10 46 11.2 18.1 c 704
2010-08-08 09:58:35 C 02 08 28.52 +10 46 19.5 18.2 c 704
2010-08-08 10:15:41 C 02 08 29.60 +10 46 28.2 18.3 c 704
2010-08-09 09:43:21 C 02 09 58.93 +10 58 28.3 18.9 c 704
2010-08-09 10:00:11 C 02 10 00.01 +10 58 36.9 19.1 c 704
2010-08-09 10:17:04 C 02 10 01.05 +10 58 45.7 19.2 c 704
2010-08-12 07:35:43 C 02 14 28.85 +11 35 07.2 u H15
2010-08-12 08:05:42 C 02 14 30.74 +11 35 23.7 u H15
2010-08-12 08:37:46 C 02 14 32.82 +11 35 40.9 u H15
2010-08-12 09:09:14 C 02 14 34.82 +11 35 57.6 u H15
2010-08-20 00:46:31 C 02 26 59.60 +13 20 46.0 w 160
2010-08-20 00:48:30 C 02 26 59.74 +13 20 47.3 w 160
2010-08-20 00:50:30 C 02 26 59.85 +13 20 48.7 w 160
2010-08-23 00:18:18 C 02 32 08.21 +14 05 47.1 u 160
2010-08-23 00:21:04 C 02 32 08.41 +14 05 49.0 u 160
2010-08-23 00:23:34 C 02 32 08.59 +14 05 50.6 u 160
2010-08-23 02:49:12 C 02 32 19.18 +14 07 26.5 r J75
2010-08-23 03:09:14 C 02 32 20.62 +14 07 39.7 r J75
2010-08-23 03:29:23 C 02 32 22.05 +14 07 52.5 r J75
2010-08-25 02:31:25 C 02 35 52.71 +14 39 08.5 u 160
2010-08-25 02:33:46 C 02 35 52.88 +14 39 10.0 u 160
2010-08-25 02:36:06 C 02 35 53.04 +14 39 11.7 u 160
2010-09-02 09:45:28 C 02 52 12.46 +17 09 46.1 u H47
2010-09-02 09:57:13 C 02 52 13.46 +17 09 56.0 u H47
2010-09-02 10:04:16 C 02 52 14.07 +17 10 02.0 u H47
2010-09-04 00:07:12 C 02 55 42.71 +17 42 54.7 u 160
2010-09-04 00:11:11 C 02 55 43.07 +17 42 58.1 u 160
2010-09-04 00:15:07 C 02 55 43.43 +17 43 01.6 u 160
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)