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
2017-08-09 08:45:33 C 02 43 22.69 +15 13 13.3 u H21
2017-08-09 08:47:31 C 02 43 22.90 +15 13 14.6 u H21
2017-08-09 08:49:29 C 02 43 23.07 +15 13 15.9 u H21
2017-08-09 08:51:26 C 02 43 23.28 +15 13 17.4 u H21
2017-08-09 08:53:24 C 02 43 23.47 +15 13 19.0 u H21
2017-08-09 08:55:22 C 02 43 23.66 +15 13 20.2 u H21
2017-08-09 08:57:19 C 02 43 23.83 +15 13 21.5 u H21
2017-08-09 08:59:17 C 02 43 24.03 +15 13 22.9 u H21
2017-08-09 09:01:14 C 02 43 24.22 +15 13 24.5 u H21
2017-08-09 09:03:12 C 02 43 24.40 +15 13 25.9 u H21
2017-08-09 09:05:10 C 02 43 24.59 +15 13 27.1 u H21
2017-08-09 09:07:07 C 02 43 24.78 +15 13 28.5 u H21
2017-08-09 09:10:27 C 02 43 25.11 +15 13 30.7 u H21
2017-08-10 09:10:11 C 02 45 47.48 +15 30 26.2 u H21
2017-08-10 09:12:42 C 02 45 47.72 +15 30 28.1 u H21
2017-08-10 09:15:13 C 02 45 47.97 +15 30 29.8 u H21
2017-08-10 09:17:45 C 02 45 48.23 +15 30 31.7 u H21
2017-08-10 09:20:16 C 02 45 48.46 +15 30 33.5 u H21
2017-08-10 09:22:47 C 02 45 48.71 +15 30 35.4 u H21
2017-08-10 09:25:18 C 02 45 48.96 +15 30 37.2 u H21
2017-08-10 09:28:56 C 02 45 49.32 +15 30 39.8 u H21
2017-08-17 00:54:36 C 03 02 49.33 +17 30 36.1 q 160
2017-08-17 00:56:39 C 03 02 49.55 +17 30 37.5 q 160
2017-08-17 00:58:44 C 03 02 49.79 +17 30 39.2 q 160
2017-08-18 07:08:49 C 03 06 19.70 +17 54 59.4 q H15
2017-08-18 07:16:07 C 03 06 20.56 +17 55 05.9 q H15
2017-08-18 07:26:49 C 03 06 21.66 +17 55 13.5 q H15
2017-08-19 01:33:06 C 03 08 30.56 +18 10 06.5 q 160
2017-08-19 01:35:12 C 03 08 30.83 +18 10 08.1 q 160
2017-08-19 01:37:19 C 03 08 31.08 +18 10 09.9 q 160
2017-08-22 18:44:53 C 03 19 41.94 +19 26 37.4 q D29
2017-08-22 19:07:47 C 03 19 44.92 +19 26 57.9 q D29
2017-08-24 14:55:10 C 03 25 39.35 +20 06 38.2 L T08
2017-08-24 15:05:14 C 03 25 40.73 +20 06 47.6 L T08
2017-08-24 15:07:31 C 03 25 41.05 +20 06 49.7 L T08
2017-08-24 15:19:03 C 03 25 42.63 +20 07 00.0 L T08
2017-08-24 15:22:03 C 03 25 43.04 +20 07 02.9 L T08
2017-08-31 02:45:30 C 03 49 30.63 +22 39 47.2 q 160
2017-08-31 02:47:35 C 03 49 30.98 +22 39 49.5 q 160
2017-08-31 02:49:38 C 03 49 31.32 +22 39 51.7 q 160
2017-09-02 17:28:38 C 04 00 39.74 +23 47 06.1 q D95
2017-09-02 17:32:50 C 04 00 40.51 +23 47 10.9 q D95
2017-09-02 17:37:03 C 04 00 41.29 +23 47 15.6 q D95
2017-09-09 14:37:35 C 04 35 55.74 +26 58 34.8 L T08
2017-09-09 14:51:41 C 04 35 59.13 +26 58 52.1 L T08
2017-09-09 15:05:25 C 04 36 02.45 +26 59 08.6 L T08
2017-09-09 15:19:39 C 04 36 05.89 +26 59 25.5 L T08
2017-09-11 14:42:12 C 04 48 13.22 +27 56 58.6 L T05
2017-09-11 14:55:08 C 04 48 16.61 +27 57 14.4 L T05
2017-09-11 15:08:50 C 04 48 20.23 +27 57 31.3 L T05
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)