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
2013-09-24 07:49:42 C 22 10 47.035 -20 39 57.51 L F51
2013-09-29 04:50:47 C 22 05 08.21 -20 50 15.6 q 703
2013-09-29 04:59:36 C 22 05 07.89 -20 50 15.7 q 703
2013-09-29 05:08:27 C 22 05 07.38 -20 50 16.5 q 703
2013-09-29 05:17:17 C 22 05 07.03 -20 50 16.7 q 703
2013-10-27 03:39:01 C 21 44 51.87 -20 26 32.1 V G45
2013-10-27 04:02:00 C 21 44 51.56 -20 26 29.9 V G45
2013-10-27 04:30:22 C 21 44 51.19 -20 26 25.1 V G45
2013-10-27 05:19:40 C 21 44 50.48 -20 26 19.5 V G45
2013-12-04 04:57:06 C 21 53 08.746 -17 05 54.10 L F51
2013-12-04 05:13:00 C 21 53 09.178 -17 05 49.34 L F51
2016-08-07 10:37:24 C 21 57 05.842 -25 44 44.27 L F51
2016-08-07 10:54:34 C 21 57 05.085 -25 44 48.01 L F51
2016-08-07 11:11:47 C 21 57 04.311 -25 44 51.70 L F51
2016-08-07 11:28:58 C 21 57 03.554 -25 44 55.38 L F51
2016-08-10 10:40:19 C 21 53 55.638 -25 59 50.44 L F51
2016-08-10 10:55:10 C 21 53 54.963 -25 59 53.41 L F51
2016-08-10 11:09:59 C 21 53 54.291 -25 59 56.40 L F51
2016-08-27 08:48:40 C 21 35 25.472 -27 08 39.35 L F51
2016-08-27 09:03:30 C 21 35 24.799 -27 08 41.24 L F51
2016-08-27 09:18:22 C 21 35 24.113 -27 08 43.16 L F51
2016-08-27 09:33:12 C 21 35 23.425 -27 08 45.20 L F51
2017-06-28 10:27:40 C 01 25 54.08 +05 54 45.9 q 703
2017-06-28 10:35:22 C 01 25 54.57 +05 54 49.7 q 703
2017-06-28 10:43:02 C 01 25 55.13 +05 54 53.4 q 703
2017-06-28 10:50:44 C 01 25 55.63 +05 54 56.8 q 703
2017-07-29 11:49:47 S 02 19 53.11 +12 24 24.3 L C51
2017-07-29 18:06:46 S 02 20 24.50 +12 28 12.4 L C51
2017-07-29 21:15:17 S 02 20 40.39 +12 30 06.0 L C51
2017-07-30 00:23:58 S 02 20 56.07 +12 31 59.0 L C51
2017-07-30 03:32:28 S 02 21 11.91 +12 33 53.7 L C51
2017-07-30 06:40:58 S 02 21 27.84 +12 35 48.9 L C51
2017-07-30 09:49:28 S 02 21 43.65 +12 37 43.4 L C51
2017-07-30 11:23:54 S 02 21 51.71 +12 38 41.2 L C51
2017-07-30 12:58:09 S 02 21 59.61 +12 39 37.9 L C51
2017-07-30 16:06:39 S 02 22 15.50 +12 41 33.5 L C51
2017-07-30 17:40:54 S 02 22 23.53 +12 42 30.8 L C51
2017-07-30 19:15:09 S 02 22 31.50 +12 43 29.4 L C51
2017-07-30 20:49:24 S 02 22 39.35 +12 44 26.5 L C51
2017-07-31 09:23:36 S 02 23 43.68 +12 52 09.5 L C51
2017-07-31 12:32:17 S 02 23 59.73 +12 54 05.5 L C51
2017-07-31 15:40:46 S 02 24 15.88 +12 56 01.6 L C51
2017-07-31 18:49:16 S 02 24 32.00 +12 57 58.5 L C51
2017-08-03 13:50:01 C 02 30 24.192 +13 40 12.21 L F51
2017-08-03 14:04:54 C 02 30 25.499 +13 40 21.83 L F51
2017-08-03 14:19:48 C 02 30 26.803 +13 40 31.44 L F51
2017-08-03 14:34:42 C 02 30 28.109 +13 40 41.07 L F51
2017-08-09 08:39:35 C 02 43 22.11 +15 13 09.2 u H21
2017-08-09 08:41:38 C 02 43 22.33 +15 13 10.6 u H21
2017-08-09 08:43:36 C 02 43 22.50 +15 13 12.1 u H21
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)