4660 Nereus (1982 DB)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3587886891 ± 2.00e+00
Semi-major axis (a)1.4849968052 AU ± 3.00e+00
Inclination (i)1.45355249° ± 4.00e+00
Long. of Asc. Node (Ω)313.11069488° ± 5.00e+00
Arg. of Perihelion (ω)159.53855352° ± 6.00e+00
Mean Anomaly (M)49.81856302° ± 6.30e-04
Mean Motion (n)0.5446581382°/day ± 1.65e+00
Perihelion dist (q)0.95219675 AU ± 3.54e+00
Aphelion dist (Q)2.01779686 AU ± 5.04e+00
Orbital Period1.80962371 yr ± 5.48e+00
NGA Modelr2
A2-4.68169994e-04 AU/d²
Physical Parameters
H (abs. magnitude)18.75
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual4.495″
Uncertainty0
Orbit TypeApollo
MOID0.004051 AU
Observations Used4486
Radar Obs Used28
Oppositions9
Arc Total1981-2002
First Observation Used1990-09-16
Last Observation Used2024-01-02
Observations (7063)
Date Type RA Dec Mag Band Observatory
2021-11-25 19:10:16 C 03 29 00.46 +41 26 04.9 V C40
2021-11-25 19:11:47 C 03 29 00.61 +41 26 10.0 V C40
2021-11-25 19:13:21 C 03 29 00.76 +41 26 15.1 V C40
2021-11-25 19:14:52 C 03 29 00.91 +41 26 19.9 V C40
2021-11-25 19:16:26 C 03 29 01.05 +41 26 24.9 V C40
2021-11-25 19:17:57 C 03 29 01.20 +41 26 29.9 V C40
2021-11-25 19:19:31 C 03 29 01.35 +41 26 34.9 V C40
2021-11-25 19:21:02 C 03 29 01.49 +41 26 39.7 V C40
2021-11-25 19:22:35 C 03 29 01.65 +41 26 44.8 V C40
2021-11-25 19:24:08 C 03 29 01.79 +41 26 49.8 V C40
2021-11-25 19:25:39 C 03 29 01.93 +41 26 54.7 V C40
2021-11-25 19:27:13 C 03 29 02.08 +41 26 59.6 V C40
2021-11-25 19:28:44 C 03 29 02.22 +41 27 04.6 V C40
2021-11-25 19:30:18 C 03 29 02.36 +41 27 09.6 V C40
2021-11-25 19:31:49 C 03 29 02.51 +41 27 14.6 V C40
2021-11-25 19:33:23 C 03 29 02.66 +41 27 19.6 V C40
2021-11-25 19:34:54 C 03 29 02.81 +41 27 24.5 V C40
2021-11-25 19:36:27 C 03 29 02.95 +41 27 29.4 V C40
2021-11-25 19:38:00 C 03 29 03.10 +41 27 34.4 V C40
2021-11-25 19:39:31 C 03 29 03.24 +41 27 39.3 V C40
2021-11-25 19:41:05 C 03 29 03.39 +41 27 44.2 V C40
2021-11-25 19:44:10 C 03 29 03.69 +41 27 54.2 V C40
2021-11-25 19:46:56 C 03 29 03.94 +41 28 03.0 V C40
2021-11-25 19:48:27 C 03 29 04.09 +41 28 08.0 V C40
2021-11-25 19:50:00 C 03 29 04.23 +41 28 12.9 V C40
2021-11-25 19:51:34 C 03 29 04.37 +41 28 17.9 V C40
2021-11-25 19:53:05 C 03 29 04.52 +41 28 22.8 V C40
2021-11-25 19:54:39 C 03 29 04.66 +41 28 27.7 V C40
2021-11-25 19:56:10 C 03 29 04.83 +41 28 32.5 V C40
2021-11-25 19:57:44 C 03 29 04.97 +41 28 37.5 V C40
2021-11-25 19:59:15 C 03 29 05.12 +41 28 42.3 V C40
2021-11-25 20:00:48 C 03 29 05.25 +41 28 47.2 V C40
2021-11-25 20:02:21 C 03 29 05.41 +41 28 52.3 V C40
2021-11-25 20:03:53 C 03 29 05.55 +41 28 57.1 V C40
2021-11-25 20:05:26 C 03 29 05.69 +41 29 02.1 V C40
2021-11-25 20:06:58 C 03 29 05.84 +41 29 06.9 V C40
2021-11-25 20:08:31 C 03 29 05.98 +41 29 11.9 V C40
2021-11-25 20:10:03 C 03 29 06.12 +41 29 16.8 V C40
2021-11-25 20:11:36 C 03 29 06.27 +41 29 21.7 V C40
2021-11-25 20:13:09 C 03 29 06.42 +41 29 26.5 V C40
2021-11-25 20:14:40 C 03 29 06.56 +41 29 31.5 V C40
2021-11-25 20:16:14 C 03 29 06.70 +41 29 36.4 V C40
2021-11-25 20:17:45 C 03 29 06.86 +41 29 41.3 V C40
2021-11-25 20:19:19 C 03 29 06.99 +41 29 46.1 V C40
2021-11-25 20:20:50 C 03 29 07.14 +41 29 51.0 V C40
2021-11-25 20:22:23 C 03 29 07.30 +41 29 56.0 V C40
2021-11-25 20:23:55 C 03 29 07.44 +41 30 00.9 V C40
2021-11-25 20:25:28 C 03 29 07.58 +41 30 05.7 V C40
2021-11-25 20:27:00 C 03 29 07.72 +41 30 10.5 V C40
2021-11-25 20:28:33 C 03 29 07.87 +41 30 15.4 V C40
Radar Observations (65)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2001-12-18.903472 108380755 10 us 2380 251 251
2001-12-20 22:54:00 103240786.97 0.5 us 2380 -1 -1
2001-12-20 22:54:00 68384.732 0.05 Hz 2380 -1 -1
2001-12-20.953472 1032425114 40 us 2380 251 251
2001-12-20.954167 10324078697 500 us 2380 251 251
2002-01-09 19:59:00 49784606.55 0.2 us 2380 -1 -1
2002-01-09 19:59:00 70245.997 0.04 Hz 2380 -1 -1
2002-01-09.781944 499160290 40 us 2380 251 251
2002-01-09.832639 4978460655 200 us 2380 251 251
2002-01-10 19:43:00 47273046.72 0.2 us 2380 -1 -1
2002-01-10 19:43:00 68613.43 0.04 Hz 2380 -1 -1
2002-01-10.818750 472799725 15 us 2380 251 251
2002-01-10.821528 4727304672 200 us 2380 251 251
2002-01-11 19:25:00 44835004.39 0.2 us 2380 -1 -1
2002-01-11 19:25:00 66627.953 0.04 Hz 2380 -1 -1
2002-01-11.770833 6841778 20 Hz 2380 251 251
2002-01-11.775000 4491829868 150 us 2380 251 251
2002-01-11.809028 4483500439 200 us 2380 251 251
2002-01-12 19:28:00 42448308.76 0.2 us 2380 -1 -1
2002-01-12 19:28:00 63457.452 0.04 Hz 2380 -1 -1
2002-01-12.811111 4244830876 200 us 2380 251 251
2002-01-13 18:30:00 40261557.21 0.2 us 2380 -1 -1
2002-01-13 18:30:00 61739.104 0.04 Hz 2380 -1 -1
2002-01-13.770833 4026155721 200 us 2380 251 251
2002-01-15 20:00:00 35994854.28 0.125 us 8560 -14 -14
2002-01-15 20:00:00 197405.524 0.25 Hz 8560 -14 -14
2002-01-15.770833 361220880 10 us 8560 253 253
2002-01-15.833333 3599485428 125 us 8560 253 253
2002-01-18 22:10:00 31139422.22 0.125 us 8560 -14 -14
2002-01-18 22:10:00 107757.4 0.25 Hz 8560 -14 -14
2002-01-18.833333 312442756 5 us 8560 253 253
2002-01-18.923611 3113942222 125 us 8560 253 253
2002-01-19 20:00:00 30181330.16 0.125 us 8560 -14 -14
2002-01-19 20:00:00 90610.817 0.125 Hz 8560 -14 -14
2002-01-19.000000 3106051265 50 us 8560 253 253
2002-01-19.729167 3028562883 50 us 8560 253 253
2002-01-19.833333 3018133016 125 us 8560 253 253
2002-01-20 21:20:00 29403320.46 0.125 us 8560 -14 -14
2002-01-20 21:20:00 46520.417 0.125 Hz 8560 -14 -14
2002-01-20.888889 2940332046 125 us 8560 253 253
2002-01-23 17:50:00 29202712.48 0.125 us 8560 -14 -14
2002-01-23 17:50:00 -39949.313 0.125 Hz 8560 -14 -14
2002-01-23.743056 2920271248 125 us 8560 253 253
2002-01-23.819444 292384970 5 us 8560 253 253
2002-01-24 16:20:00 29752549.35 0.125 us 8560 -14 -14
2002-01-24 16:20:00 -64888.574 0.125 Hz 8560 -14 -14
2002-01-24.680556 2975254935 125 us 8560 253 253
2002-01-25 17:50:00 30706982.46 0.125 us 8560 -14 -14
2002-01-25 17:50:00 -107448.878 0.125 Hz 8560 -14 -14
2002-01-25.743056 3070698246 125 us 8560 253 253
2002-01-26 16:30:00 31828818.7 0.125 us 8560 -14 -14
2002-01-26 16:30:00 -127522.95 0.125 Hz 8560 -14 -14
2002-01-26.687500 3182881870 125 us 8560 253 253
2002-01-27 16:50:00 33282611.95 0.125 us 8560 -14 -14
2002-01-27 16:50:00 -155058.598 0.125 Hz 8560 -14 -14
2002-01-27.701389 3328261195 125 us 8560 253 253
2002-01-29 16:50:00 36769265.89 0.125 us 8560 -14 -14
2002-01-29 16:50:00 -194945.298 0.125 Hz 8560 -14 -14
2002-01-29.701389 3676926589 125 us 8560 253 253
2002-01-29.763889 3689491563 50 us 8560 253 253
2021-11-29 08:00:00 53941354.495 2 us 8560 -14 -14
2021-11-30 09:20:00 50332716.46 1 us 8560 -14 -14
2021-12-07 06:20:00 30890699 1 us 8560 -14 -14
2021-12-15 10:00:00 29934898 1 us 8560 -14 -14
2021-12-15 23:10:00 -171136.057 1.15 Hz 7159.45 -47 -43
Station codes
-47 DSS-47 ATCA (W196) -43 DSS-43 Tidbinbilla (70-m) -14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)