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
2003-10-13 09:20:26 C 06 28 07.00 +45 19 28.5 14.8 c 704
2003-10-13 09:38:58 C 06 28 24.62 +45 20 26.0 14.9 c 704
2003-10-14 09:17:23 C 06 52 19.88 +46 24 39.6 14.7 c 704
2003-10-14 09:34:21 C 06 52 37.72 +46 25 21.5 14.9 c 704
2003-10-14 09:50:56 C 06 52 55.13 +46 26 02.7 15.0 c 704
2003-10-14 09:51:06 C 06 52 55.29 +46 26 02.1 14.9 c 704
2003-10-14 10:07:39 C 06 53 12.68 +46 26 43.3 14.8 c 704
2003-10-14 10:07:47 C 06 53 12.84 +46 26 42.9 14.8 c 704
2003-10-14 10:24:53 C 06 53 30.83 +46 27 25.2 14.6 c 704
2003-10-14 10:25:01 C 06 53 30.98 +46 27 24.7 14.7 c 704
2003-10-15 09:05:57 C 07 18 40.08 +47 11 53.8 14.7 c 704
2003-10-15 09:22:33 C 07 18 58.97 +47 12 21.2 14.6 c 704
2003-10-15 09:39:20 C 07 19 18.04 +47 12 48.6 14.9 c 704
2003-10-15 09:56:16 C 07 19 37.45 +47 13 15.0 14.8 c 704
2003-10-15 10:13:22 C 07 19 56.95 +47 13 42.5 14.6 c 704
2003-10-16 07:54:50 C 07 45 38.47 +47 36 13.8 13.6 d H72
2003-10-16 07:55:23 C 07 45 39.04 +47 36 14.2 12.4 d H72
2003-10-16 07:55:55 C 07 45 39.69 +47 36 14.7 11.9 d H72
2003-10-16 07:56:27 C 07 45 40.35 +47 36 14.8 13.3 d H72
2003-10-16 10:18:49 C 07 48 32.54 +47 37 24.7 14.4 c 704
2003-10-16 10:35:25 C 07 48 52.52 +47 37 33.0 14.6 c 704
2003-10-16 10:51:54 C 07 49 12.35 +47 37 40.9 14.6 c 704
2003-10-16 11:08:41 C 07 49 32.57 +47 37 48.7 14.5 c 704
2003-10-16 11:25:13 C 07 49 52.46 +47 37 56.3 14.4 c 704
2003-10-16 19:37:01 C 07 59 54.97 +47 39 29.6 m 379
2003-10-16 19:38:40 C 07 59 56.95 +47 39 29.5 m 379
2003-10-16 19:45:16 C 08 00 05.01 +47 39 29.4 m 379
2004-05-01 18:01:39 C 19 57 42.60 -36 39 51.7 r E17
2004-05-01 18:05:57 C 19 57 42.54 -36 39 53.0 r E17
2004-05-11 15:03:29 C 19 53 15.77 -38 01 29.2 r E12
2004-05-11 15:18:19 C 19 53 15.35 -38 01 34.6 r E12
2004-05-11 15:33:03 C 19 53 14.94 -38 01 40.3 r E12
2004-05-11 15:47:51 C 19 53 14.47 -38 01 44.8 r E12
2004-05-11 16:52:26 C 19 53 12.58 -38 02 08.5 r E12
2004-05-11 17:08:45 C 19 53 12.08 -38 02 14.3 r E12
2004-05-11 17:25:05 C 19 53 11.38 -38 02 20.6 r E12
2004-05-11 17:41:30 C 19 53 11.08 -38 02 25.7 r E12
2006-08-24 07:55:08 C 22 48 46.91 -18 56 46.2 o 644
2006-08-24 08:24:35 C 22 48 45.39 -18 56 54.6 o 644
2006-08-24 08:55:53 C 22 48 43.76 -18 57 03.0 o 644
2006-09-20 05:06:38 C 22 13 43.89 -21 17 47.4 r 703
2006-09-20 05:15:11 C 22 13 43.50 -21 17 49.0 r 703
2006-09-20 05:23:43 C 22 13 42.99 -21 17 50.8 r 703
2006-09-20 05:32:17 C 22 13 42.56 -21 17 49.9 r 703
2007-07-26 08:42:50 C 12 01 40.47 -08 58 04.1 r E12
2007-07-26 08:50:30 C 12 01 41.88 -08 58 15.0 r E12
2007-07-26 08:58:10 C 12 01 43.28 -08 58 26.2 r E12
2007-07-26 09:05:49 C 12 01 44.68 -08 58 37.2 r E12
2007-08-09 08:49:22 C 12 58 25.68 -16 06 07.2 r E12
2007-08-09 08:58:35 C 12 58 27.08 -16 06 17.3 r E12
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)