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
1996-10-20 01:48:50 C 01 15 09.52 +50 25 54.2 12.5 z 629
1996-10-20 01:58:35 C 01 15 03.49 +50 27 46.4 12.0 z 629
1996-10-20 02:00:01 C 01 15 10.24 +50 28 14.8 z 827
1996-10-20 02:01:28 C 01 15 01.76 +50 28 19.9 11.8 z 629
1996-10-20 02:05:22 C 01 14 59.29 +50 29 04.8 11.8 z 629
1996-10-20 02:30:00 C 01 14 51.25 +50 34 06.6 z 827
1996-10-20 02:44:58 C 01 14 41.69 +50 37 02.9 z 827
1996-10-20 02:59:59 C 01 14 32.06 +50 39 59.5 z 827
1996-10-20 03:15:00 C 01 14 22.41 +50 42 55.9 z 827
1996-10-23 06:50:47 C 23 31 41.55 +67 49 30.6 z 683
1996-10-23 06:54:11 C 23 31 31.96 +67 50 15.9 z 683
1996-10-23 06:58:27 C 23 31 19.87 +67 51 12.7 z 683
1996-10-23 07:10:42 C 23 30 45.14 +67 53 54.6 z 683
1996-10-23 07:15:10 C 23 30 32.52 +67 54 53.7 z 683
1996-10-23 07:18:47 C 23 30 22.24 +67 55 41.5 z 683
1996-10-26 01:30:00 C 18 29 36.16 +70 28 53.4 z 819
1996-10-26 01:45:00 C 18 28 35.61 +70 25 46.4 z 819
1996-10-26 01:59:59 C 18 27 35.53 +70 22 38.0 z 819
1996-10-26 02:15:00 C 18 26 35.69 +70 19 28.2 z 819
1996-10-26 02:30:00 C 18 25 36.42 +70 16 17.3 z 819
1996-10-26 02:44:59 C 18 24 37.48 +70 13 05.2 z 819
1996-10-26 03:00:00 C 18 23 38.87 +70 09 51.7 z 819
1996-10-26 03:15:00 C 18 22 40.71 +70 06 37.2 z 819
1996-10-26 03:29:59 C 18 21 42.84 +70 03 21.2 z 819
1996-10-27 02:30:00 C 17 12 57.42 +64 13 24.5 z 826
1996-10-27 02:44:59 C 17 12 23.85 +64 09 08.5 z 826
1996-10-27 03:00:00 C 17 11 50.56 +64 04 51.7 z 826
1996-10-27 03:15:00 C 17 11 17.56 +64 00 34.8 z 826
1996-10-27 03:29:59 C 17 10 44.77 +63 56 18.0 z 826
1996-10-30 17:39:58 C 15 40 45.56 +41 11 35.1 z 107
1996-10-30 18:02:27 C 15 40 34.89 +41 06 40.0 z 107
1996-10-30 18:10:28 C 15 40 31.13 +41 04 55.3 z 107
1999-11-05 02:30:33 C 21 40 00.17 -21 01 26.1 z 711
1999-11-05 02:49:43 C 21 40 00.14 -21 01 21.9 z 711
1999-11-05 03:10:35 C 21 40 00.14 -21 01 17.8 z 711
2002-07-16 09:47:53 C 22 10 47.81 -24 39 29.1 711
2002-07-16 10:06:29 C 22 10 47.31 -24 39 32.4 711
2002-07-16 10:25:01 C 22 10 46.77 -24 39 36.7 711
2003-07-30 09:28:04 C 01 49 10.79 +07 25 09.6 18.9 c 704
2003-07-30 09:44:02 C 01 49 11.71 +07 25 14.1 19.0 c 704
2003-07-30 10:00:02 C 01 49 12.61 +07 25 21.6 19.4 c 704
2003-07-30 10:15:34 C 01 49 13.44 +07 25 26.7 19.4 c 704
2003-07-30 10:31:11 C 01 49 14.25 +07 25 33.3 19.2 c 704
2003-08-05 02:38:15 C 01 56 44.08 +08 21 23.5 d 170
2003-08-05 02:41:45 C 01 56 44.34 +08 21 25.7 d 170
2003-08-20 06:56:07 C 02 17 35.81 +11 08 09.4 m 859
2003-08-20 07:05:15 C 02 17 36.27 +11 08 14.4 m 859
2003-08-20 07:13:57 C 02 17 36.83 +11 08 18.7 m 859
2003-08-22 07:42:35 C 02 20 32.26 +11 33 15.2 17.5 c 704
2003-08-22 08:00:51 C 02 20 33.37 +11 33 24.5 17.6 c 704
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)