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
2020-10-06 04:25:27 C 22 03 32.26 -20 06 01.3 V 703
2020-10-06 04:33:11 C 22 03 31.94 -20 06 00.9 V 703
2020-10-06 04:40:56 C 22 03 31.60 -20 06 01.5 V 703
2020-10-06 07:59:18 C 22 03 23.177 -20 06 05.78 U F52
2020-10-06 08:15:50 C 22 03 22.457 -20 06 06.20 U F52
2020-10-06 08:32:25 C 22 03 21.730 -20 06 06.57 U F52
2020-10-07 12:34:49 C 22 02 12.32 -20 06 43.8 q D29
2020-10-07 12:55:10 C 22 02 11.47 -20 06 44.6 q D29
2020-10-11 05:26:41 C 21 58 47.445 -20 06 56.60 U F51
2020-10-11 05:46:16 C 21 58 46.712 -20 06 56.43 U F51
2020-10-11 06:05:53 C 21 58 45.975 -20 06 56.20 U F51
2020-10-11 06:25:28 C 21 58 45.246 -20 06 55.97 U F51
2020-10-18 05:38:51 C 21 53 27.628 -20 00 25.95 U F51
2020-10-18 05:54:42 C 21 53 27.178 -20 00 25.01 U F51
2020-10-18 06:10:31 C 21 53 26.725 -20 00 23.99 U F51
2020-10-18 06:26:21 C 21 53 26.278 -20 00 23.01 U F51
2020-10-20 03:53:37 C 21 52 15.98 -19 57 08.6 V G96
2020-10-20 04:01:43 C 21 52 15.76 -19 57 08.0 V G96
2020-10-20 04:09:50 C 21 52 15.55 -19 57 07.1 V G96
2020-10-20 04:17:56 C 21 52 15.34 -19 57 06.7 V G96
2020-11-08 10:25:33 C 21 46 51.41 -18 53 00.2 q D29
2020-11-08 10:45:54 C 21 46 51.39 -18 52 56.1 q D29
2020-11-08 11:06:16 C 21 46 51.43 -18 52 52.1 q D29
2020-11-09 10:45:27 C 21 46 53.33 -18 48 14.8 q D29
2020-11-09 11:05:49 C 21 46 53.34 -18 48 10.1 q D29
2020-11-09 11:26:11 C 21 46 53.40 -18 48 06.3 q D29
2020-11-10 06:21:56 C 21 46 56.18 -18 44 17.1 V T08
2020-11-10 06:26:35 C 21 46 56.24 -18 44 16.8 V T08
2020-11-10 06:34:33 C 21 46 56.18 -18 44 15.0 V T08
2020-11-10 06:49:49 C 21 46 56.19 -18 44 12.6 V T08
2020-11-15 02:19:52 C 21 47 37.11 -18 19 24.6 U I41
2020-11-15 03:00:19 C 21 47 37.42 -18 19 15.1 U I41
2020-11-17 02:28:08 C 21 48 05.65 -18 08 16.1 U I41
2020-11-17 02:38:43 C 21 48 05.77 -18 08 13.5 U I41
2021-01-02 01:33:22 C 22 24 22.24 -11 56 31.3 V G96
2021-01-02 01:39:31 C 22 24 22.56 -11 56 28.4 V G96
2021-01-02 01:45:42 C 22 24 22.89 -11 56 25.8 V G96
2021-01-02 01:51:51 C 22 24 23.18 -11 56 23.2 V G96
2021-01-09 01:59:44 C 22 33 23.95 -10 39 55.7 U I41
2021-01-09 02:06:42 C 22 33 24.34 -10 39 52.1 U I41
2021-01-09 02:10:11 C 22 33 24.53 -10 39 50.7 U I41
2021-01-10 01:57:00 C 22 34 44.87 -10 28 34.0 U I41
2021-01-10 02:00:30 C 22 34 45.06 -10 28 32.3 U I41
2021-01-10 02:03:59 C 22 34 45.25 -10 28 30.4 U I41
2021-01-10 02:07:28 C 22 34 45.46 -10 28 29.3 U I41
2021-01-10 02:10:57 C 22 34 45.63 -10 28 27.2 U I41
2021-01-11 01:57:48 C 22 36 06.93 -10 17 03.5 U I41
2021-01-11 02:01:18 C 22 36 07.13 -10 17 01.7 U I41
2021-01-11 02:04:48 C 22 36 07.33 -10 17 00.2 U I41
2021-01-11 02:08:18 C 22 36 07.52 -10 16 58.6 U I41
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)