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
2021-01-11 02:11:48 C 22 36 07.72 -10 16 57.1 U I41
2021-01-12 01:59:18 C 22 37 30.02 -10 05 25.6 U I41
2021-01-12 02:02:45 C 22 37 30.20 -10 05 23.7 U I41
2021-01-12 02:06:12 C 22 37 30.38 -10 05 22.5 U I41
2021-01-12 02:09:41 C 22 37 30.60 -10 05 20.6 U I41
2021-01-12 02:13:07 C 22 37 30.81 -10 05 19.2 U I41
2021-01-15 02:04:35 C 22 41 45.00 -09 29 47.0 U I41
2021-01-15 02:11:32 C 22 41 45.37 -09 29 43.6 U I41
2021-01-15 02:15:00 C 22 41 45.59 -09 29 42.4 U I41
2021-01-16 02:01:56 C 22 43 11.59 -09 17 42.4 U I41
2021-01-16 02:05:27 C 22 43 11.74 -09 17 41.0 U I41
2021-01-16 02:08:57 C 22 43 12.01 -09 17 39.3 U I41
2021-01-16 02:12:28 C 22 43 12.24 -09 17 36.9 U I41
2021-01-16 02:15:59 C 22 43 12.44 -09 17 35.2 U I41
2021-01-17 02:02:04 C 22 44 39.27 -09 05 29.1 U I41
2021-06-08 06:03:15 C 08 42 17.80 +12 54 14.7 V T08
2021-06-08 06:07:53 C 08 42 19.24 +12 54 03.9 V T08
2021-06-08 06:15:51 C 08 42 21.70 +12 53 45.9 V T08
2021-06-19 06:18:02 C 10 00 21.81 +02 24 26.2 V T08
2021-06-19 06:22:40 C 10 00 23.09 +02 24 15.2 V T08
2021-06-19 06:31:20 C 10 00 25.49 +02 23 54.5 V T08
2021-06-19 06:48:36 C 10 00 30.20 +02 23 14.1 V T08
2021-06-27 06:10:53 C 10 50 17.04 -04 41 46.7 V T08
2021-06-27 06:15:31 C 10 50 18.17 -04 41 56.3 V T08
2021-06-27 06:23:29 C 10 50 20.09 -04 42 12.7 V T08
2021-06-27 06:40:44 C 10 50 24.28 -04 42 48.0 V T08
2021-06-29 06:07:27 C 11 01 45.76 -06 17 50.1 V T05
2021-06-29 06:12:04 C 11 01 46.87 -06 17 59.4 V T05
2021-06-29 06:23:16 C 11 01 49.46 -06 18 21.2 V T05
2021-06-29 06:39:06 C 11 01 53.16 -06 18 51.9 V T05
2021-06-30 07:33:04 C 11 07 41.52 -07 06 40.0 q E89
2021-06-30 07:41:02 C 11 07 43.36 -07 06 55.6 q E89
2021-06-30 07:49:31 C 11 07 45.29 -07 07 11.8 q E89
2021-06-30 07:57:57 C 11 07 47.22 -07 07 27.6 q E89
2021-07-01 06:11:17 C 11 12 52.54 -07 49 19.9 V T08
2021-07-01 06:17:15 C 11 12 53.89 -07 49 31.0 V T08
2021-07-01 06:25:12 C 11 12 55.68 -07 49 45.8 V T08
2021-07-01 06:41:09 C 11 12 59.27 -07 50 15.2 V T08
2021-07-07 06:14:40 C 11 43 54.57 -11 54 27.1 V T05
2021-07-07 06:19:57 C 11 43 55.66 -11 54 35.2 V T05
2021-07-07 06:27:52 C 11 43 57.25 -11 54 47.2 V T05
2021-07-07 06:44:21 C 11 44 00.58 -11 55 12.8 V T05
2021-07-18 06:01:43 C 12 32 53.94 -17 40 09.2 V T05
2021-07-18 06:06:20 C 12 32 54.75 -17 40 13.5 V T05
2021-07-18 06:18:13 C 12 32 56.69 -17 40 25.8 V T05
2021-07-18 06:44:09 C 12 33 01.11 -17 40 54.0 V T05
2021-07-26 06:01:02 C 13 03 22.16 -20 45 06.6 V T05
2021-07-26 06:05:40 C 13 03 22.86 -20 45 10.7 V T05
2021-07-26 06:13:37 C 13 03 24.04 -20 45 16.7 V T05
2021-07-26 06:30:09 C 13 03 26.48 -20 45 30.9 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)