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
2003-08-22 08:18:52 C 02 20 34.45 +11 33 33.9 17.6 c 704
2003-08-22 08:36:37 C 02 20 35.47 +11 33 43.3 17.6 c 704
2003-08-22 08:55:58 C 02 20 36.62 +11 33 53.3 17.9 c 704
2003-08-23 10:50:47 C 02 22 11.23 +11 47 41.0 c 670
2003-08-23 10:53:48 C 02 22 11.44 +11 47 42.9 c 670
2003-08-24 02:14:37 C 02 23 07.96 +11 55 59.4 c 204
2003-08-24 02:22:25 C 02 23 08.42 +11 56 03.6 c 204
2003-08-24 02:30:43 C 02 23 08.93 +11 56 08.2 c 204
2003-08-25 00:45:18 C 02 24 31.70 +12 08 21.2 r J87
2003-08-25 00:48:30 C 02 24 31.94 +12 08 23.4 r J87
2003-08-25 00:51:46 C 02 24 32.07 +12 08 24.6 r J87
2003-08-25 00:54:57 C 02 24 32.40 +12 08 26.3 r J87
2003-08-25 08:11:13 C 02 24 59.47 +12 12 31.4 17.6 c 704
2003-08-25 08:29:07 C 02 25 00.55 +12 12 41.4 17.6 c 704
2003-08-25 08:47:26 C 02 25 01.67 +12 12 51.6 17.3 c 704
2003-08-25 09:05:58 C 02 25 02.79 +12 13 02.3 17.7 c 704
2003-08-25 09:25:55 C 02 25 03.98 +12 13 13.4 17.6 c 704
2003-08-29 08:38:19 C 02 31 07.95 +13 08 48.4 17.1 c 704
2003-08-29 08:57:07 C 02 31 09.14 +13 09 00.0 17.6 c 704
2003-08-29 09:15:44 C 02 31 10.31 +13 09 11.7 17.7 c 704
2003-08-30 12:01:58 C 02 32 55.58 +13 25 46.6 c 670
2003-08-30 12:06:32 C 02 32 55.86 +13 25 49.6 c 670
2003-09-04 01:38:24 C 02 40 26.41 +14 39 00.4 c 196
2003-09-04 02:32:15 C 02 40 30.15 +14 39 38.5 c 196
2003-09-05 08:14:34 C 02 42 38.84 +15 01 17.2 c 704
2003-09-05 08:35:15 C 02 42 40.31 +15 01 32.7 c 704
2003-09-05 08:56:18 C 02 42 41.80 +15 01 48.3 c 704
2003-09-11 03:56:16 C 02 53 31.88 +16 55 39.0 r 170
2003-09-11 03:59:15 C 02 53 32.13 +16 55 41.8 r 170
2003-09-13 23:13:47 C 02 59 26.09 +18 00 09.9 c J87
2003-09-13 23:15:53 C 02 59 26.26 +18 00 12.0 c J87
2003-09-13 23:17:59 C 02 59 26.47 +18 00 14.3 c J87
2003-09-13 23:20:06 C 02 59 26.66 +18 00 16.3 c J87
2003-09-14 00:45:10 C 02 59 34.12 +18 01 42.5 c 163
2003-09-14 00:45:55 C 02 59 34.16 +18 01 43.2 c 163
2003-09-14 00:46:15 C 02 59 34.21 +18 01 43.7 c 163
2003-09-14 00:46:36 C 02 59 34.25 +18 01 43.9 c 163
2003-09-14 00:47:00 C 02 59 34.29 +18 01 44.6 c 163
2003-09-14 00:48:05 C 02 59 34.37 +18 01 45.2 c 163
2003-09-19 18:34:24 C 03 13 40.55 +20 41 25.9 m 379
2003-09-19 18:35:33 C 03 13 40.70 +20 41 26.9 m 379
2003-09-19 18:40:18 C 03 13 41.23 +20 41 33.3 m 379
2003-09-19 18:42:27 C 03 13 41.47 +20 41 36.6 m 379
2003-09-19 23:37:00 C 03 14 16.55 +20 48 03.9 r J87
2003-09-19 23:39:07 C 03 14 16.80 +20 48 06.8 r J87
2003-09-19 23:41:13 C 03 14 17.04 +20 48 09.5 r J87
2003-09-19 23:43:20 C 03 14 17.27 +20 48 12.6 r J87
2003-09-20 23:37:34 C 03 17 08.51 +21 20 56.6 r J87
2003-09-20 23:39:41 C 03 17 08.77 +21 20 59.5 r J87
2003-09-20 23:41:47 C 03 17 09.02 +21 21 02.4 r J87
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)