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
2010-09-18 11:14:45 C 03 37 24.73 +24 25 03.7 16.1 c 704
2010-09-20 02:51:31 C 03 44 05.92 +25 27 31.2 u 160
2010-09-20 02:53:13 C 03 44 06.21 +25 27 34.1 u 160
2010-09-20 02:55:01 C 03 44 06.51 +25 27 37.0 u 160
2010-09-21 00:59:21 C 03 48 07.20 +26 04 27.4 u 160
2010-09-21 01:01:39 C 03 48 07.62 +26 04 31.5 u 160
2010-09-21 01:03:57 C 03 48 08.04 +26 04 35.3 u 160
2010-09-23 02:00:09 C 03 57 50.56 +27 31 50.4 u 160
2010-09-23 02:01:22 C 03 57 50.81 +27 31 52.7 u 160
2010-09-23 02:03:13 C 03 57 51.19 +27 31 56.2 u 160
2010-09-24 10:06:23 C 04 04 56.01 +28 33 33.8 u H47
2010-09-24 10:15:01 C 04 04 57.96 +28 33 50.7 u H47
2010-09-24 10:20:15 C 04 04 59.17 +28 34 01.6 u H47
2010-09-25 16:41:12 C 04 12 20.35 +29 35 41.6 o 300
2010-09-25 16:43:34 C 04 12 20.86 +29 35 46.6 o 300
2010-09-25 16:45:09 C 04 12 21.24 +29 35 49.2 o 300
2010-09-25 16:46:44 C 04 12 21.62 +29 35 52.7 o 300
2010-10-06 00:01:38 C 05 49 59.37 +39 37 59.8 r J37
2010-10-06 00:19:35 C 05 50 10.00 +39 38 44.8 r J37
2010-10-06 00:56:06 C 05 50 31.72 +39 40 16.7 r J37
2010-10-11 15:51:11 S 07 30 57.912 +43 30 10.30 L C51
2010-10-11 17:26:21 S 07 32 21.360 +43 30 56.16 L C51
2010-10-11 19:01:31 S 07 33 45.019 +43 31 38.28 L C51
2010-10-11 20:36:41 S 07 35 08.873 +43 32 16.91 L C51
2010-10-22 04:01:22 C 10 55 22.98 +33 05 46.9 u 160
2010-10-22 04:03:37 C 10 55 24.34 +33 05 37.0 u 160
2010-10-22 04:05:52 C 10 55 25.65 +33 05 27.2 u 160
2012-07-24 09:54:50 C 21 10 13.55 -31 18 27.3 u 807
2012-07-24 10:09:23 C 21 10 12.89 -31 18 29.9 u 807
2012-07-24 10:23:46 C 21 10 12.29 -31 18 32.3 u 807
2013-07-31 07:59:26 C 23 15 15.96 -15 29 34.1 V G45
2013-07-31 08:24:00 C 23 15 15.17 -15 29 40.6 V G45
2013-07-31 09:23:02 C 23 15 13.41 -15 29 54.9 V G45
2013-07-31 10:05:29 C 23 15 12.09 -15 30 04.6 V G45
2013-07-31 10:29:40 C 23 15 11.39 -15 30 10.5 V G45
2013-08-28 06:45:53 C 22 46 27.60 -18 30 18.0 q 703
2013-08-28 06:55:55 C 22 46 27.01 -18 30 20.7 q 703
2013-08-28 07:06:05 C 22 46 26.45 -18 30 23.6 q 703
2013-08-28 07:16:14 C 22 46 25.87 -18 30 25.8 q 703
2013-09-01 06:20:12 C 22 41 13.45 -18 55 21.9 q 703
2013-09-01 06:33:39 C 22 41 12.79 -18 55 26.8 q 703
2013-09-01 06:47:06 C 22 41 11.93 -18 55 29.8 q 703
2013-09-01 07:00:33 C 22 41 11.21 -18 55 32.1 q 703
2013-09-02 06:03:50 C 22 39 53.95 -19 01 21.4 r Y00
2013-09-02 06:11:15 C 22 39 53.52 -19 01 22.6 r Y00
2013-09-02 06:21:57 C 22 39 52.86 -19 01 24.6 r Y00
2013-09-09 09:04:02 C 22 30 15.058 -19 41 25.59 L F51
2013-09-09 10:05:20 C 22 30 11.516 -19 41 38.79 L F51
2013-09-09 10:20:23 C 22 30 10.646 -19 41 41.94 L F51
2013-09-24 07:34:24 C 22 10 47.826 -20 39 55.76 L F51
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)