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
2018-06-14 12:38:35 C 19 24 49.87 -41 34 56.5 U T05
2018-06-14 13:08:57 C 19 24 47.59 -41 35 03.8 U T05
2018-06-14 13:25:23 C 19 24 46.39 -41 35 08.4 U T05
2018-06-16 11:28:46 C 19 21 20.76 -41 44 44.1 U T05
2018-06-16 11:37:20 C 19 21 20.12 -41 44 46.6 U T05
2018-06-16 11:40:38 C 19 21 19.83 -41 44 47.0 U T05
2018-06-16 11:51:57 C 19 21 19.00 -41 44 48.0 U T05
2018-06-16 11:53:57 C 19 21 18.89 -41 44 48.5 U T05
2019-07-05 12:35:18 C 21 32 47.730 -29 11 08.32 U F51
2019-07-05 12:51:06 C 21 32 47.219 -29 11 11.74 U F51
2019-07-05 13:06:51 C 21 32 46.705 -29 11 15.20 U F51
2019-07-05 13:22:37 C 21 32 46.192 -29 11 18.55 U F51
2019-07-10 11:32:59 C 21 28 50.347 -29 37 08.20 U F51
2019-07-10 11:48:46 C 21 28 49.795 -29 37 11.57 U F51
2019-07-10 12:04:33 C 21 28 49.215 -29 37 15.17 U F51
2019-09-23 05:31:24 C 20 21 24.863 -31 53 24.38 U F51
2019-09-23 06:00:56 C 20 21 24.359 -31 53 21.80 U F51
2019-09-23 06:15:41 C 20 21 24.102 -31 53 20.33 U F51
2020-07-20 12:45:27 C 23 28 30.971 -13 28 03.77 U F52
2020-07-20 13:00:17 C 23 28 30.704 -13 28 06.20 U F52
2020-07-20 13:15:06 C 23 28 30.458 -13 28 08.79 U F52
2020-07-20 13:29:58 C 23 28 30.209 -13 28 11.47 U F52
2020-07-20 19:31:48 C 23 28 24.307 -13 29 11.69 V P07
2020-07-20 20:31:21 C 23 28 23.278 -13 29 22.24 V P07
2020-07-20 20:56:18 C 23 28 22.855 -13 29 26.23 V P07
2020-07-20 20:58:12 C 23 28 22.822 -13 29 26.77 V P07
2020-07-20 21:28:30 C 23 28 22.303 -13 29 31.70 V P07
2020-07-23 01:18:35 C 23 27 27.79 -13 38 56.9 V C95
2020-07-23 01:41:03 C 23 27 27.30 -13 39 00.1 V C95
2020-07-28 13:51:22 C 23 24 34.829 -14 05 36.17 U F51
2020-07-28 14:02:52 C 23 24 34.532 -14 05 38.68 U F51
2020-07-28 14:14:25 C 23 24 34.238 -14 05 41.13 U F51
2020-08-10 12:08:39 C 23 14 41.111 -15 21 35.81 U F51
2020-08-10 12:23:36 C 23 14 40.497 -15 21 39.85 U F51
2020-08-10 12:38:29 C 23 14 39.899 -15 21 43.90 U F51
2020-08-10 12:53:23 C 23 14 39.298 -15 21 47.91 U F51
2020-08-15 12:33:56 C 23 09 40.25 -15 54 55.1 V T08
2020-08-15 12:37:55 C 23 09 40.05 -15 54 55.7 V T08
2020-08-15 12:46:32 C 23 09 39.66 -15 54 58.0 V T08
2020-08-15 13:35:49 C 23 09 37.45 -15 55 12.0 V T08
2020-08-18 12:45:00 C 23 06 22.327 -16 15 28.14 U F52
2020-08-18 13:01:31 C 23 06 21.530 -16 15 32.78 U F52
2020-08-18 13:18:03 C 23 06 20.741 -16 15 37.48 U F52
2020-08-19 12:19:13 C 23 05 15.067 -16 22 14.20 U F51
2020-08-19 12:37:12 C 23 05 14.181 -16 22 19.33 U F51
2020-08-19 12:55:10 C 23 05 13.297 -16 22 24.53 U F51
2020-08-19 13:13:11 C 23 05 12.410 -16 22 29.67 U F51
2020-08-21 10:27:20 C 23 02 59.89 -16 35 30.8 V T05
2020-08-21 10:31:17 C 23 02 59.66 -16 35 32.5 V T05
2020-08-21 10:36:33 C 23 02 59.40 -16 35 34.9 V 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)