IAA RAS IAA Minor Planet Database

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
2021-10-30 18:01:05 C 03 04 30.73 +26 43 00.6 – V C40
2021-10-30 18:03:56 S 03 02 24.434 +27 01 05.09 – V C57
2021-10-30 18:03:56 s 1 +45049.289 0 +368447.35 8330.0 – C57
2021-10-30 18:05:49 C 03 04 30.79 +26 43 04.2 – V C40
2021-10-30 18:07:23 C 03 04 30.81 +26 43 05.4 – V C40
2021-10-30 18:10:30 C 03 04 30.83 +26 43 07.8 – V C40
2021-10-30 18:13:39 C 03 04 30.86 +26 43 10.0 – V C40
2021-10-30 18:13:56 S 03 02 24.430 +27 01 10.52 – V C57
2021-10-30 18:13:56 s 1 +44691.207 0 +368553.30 2670.0 – C57
2021-10-30 18:15:14 C 03 04 30.89 +26 43 11.1 – V C40
2021-10-30 18:16:48 C 03 04 30.89 +26 43 12.5 – V C40
2021-10-30 18:18:23 C 03 04 30.92 +26 43 13.5 – V C40
2021-10-30 18:19:56 C 03 04 30.92 +26 43 14.7 – V C40
2021-10-30 18:21:30 C 03 04 30.95 +26 43 15.9 – V C40
2021-10-30 18:23:56 S 03 02 24.384 +27 01 16.14 – V C57
2021-10-30 18:23:56 s 1 +44333.009 0 +368658.22 6690.0 – C57
2021-10-30 18:26:14 C 03 04 30.99 +26 43 19.4 – V C40
2021-10-30 18:27:48 C 03 04 31.00 +26 43 20.5 – V C40
2021-10-30 18:30:42 C 03 04 31.32 +26 43 14.3 – Y 557
2021-10-30 18:33:56 S 03 02 24.362 +27 01 21.43 – V C57
2021-10-30 18:33:56 s 1 +43974.698 0 +368762.09 410.0 – C57
2021-10-30 18:39:46 C 03 04 31.11 +26 43 29.5 – V C40
2021-10-30 18:43:56 S 03 02 24.281 +27 01 28.49 – V C57
2021-10-30 18:43:56 s 1 +43616.274 0 +368864.92 3830.0 – C57
2021-10-30 18:44:28 C 03 04 31.15 +26 43 32.8 – V C40
2021-10-30 18:46:03 C 03 04 31.17 +26 43 34.1 – V C40
2021-10-30 18:52:20 C 03 04 31.23 +26 43 38.7 – V C40
2021-10-30 18:53:54 C 03 04 31.24 +26 43 39.9 – V C40
2021-10-30 18:53:56 S 03 02 24.230 +27 01 33.96 – V C57
2021-10-30 18:53:56 s 1 +43257.739 0 +368966.71 6950.0 – C57
2021-10-30 18:55:28 C 03 04 31.26 +26 43 41.1 – V C40
2021-10-30 18:57:04 C 03 04 31.26 +26 43 42.2 – V C40
2021-10-30 18:58:38 C 03 04 31.28 +26 43 43.5 – V C40
2021-10-30 19:00:12 C 03 04 31.28 +26 43 44.6 – V C40
2021-10-30 19:01:45 C 03 04 31.30 +26 43 45.8 – V C40
2021-10-30 19:03:56 S 03 02 24.158 +27 01 38.89 – V C57
2021-10-30 19:03:56 s 1 +42899.092 0 +369067.46 9770.0 – C57
2021-10-30 19:06:29 C 03 04 31.35 +26 43 49.2 – V C40
2021-10-30 19:08:03 C 03 04 31.35 +26 43 50.3 – V C40
2021-10-30 19:09:38 C 03 04 31.38 +26 43 51.6 – V C40
2021-10-30 19:11:32 C 03 04 31.39 +26 43 53.0 – V C40
2021-10-30 19:13:07 C 03 04 31.41 +26 43 54.1 – V C40
2021-10-30 19:13:56 S 03 02 24.139 +27 01 45.98 – V C57
2021-10-30 19:13:56 s 1 +42540.337 0 +369167.16 2300.0 – C57
2021-10-30 19:14:40 C 03 04 31.41 +26 43 55.2 – V C40
2021-10-30 19:16:14 C 03 04 31.42 +26 43 56.5 – V C40
2021-10-30 19:17:49 C 03 04 31.43 +26 43 57.6 – V C40
2021-10-30 19:19:24 C 03 04 31.45 +26 43 58.8 – V C40
2021-10-30 19:22:31 C 03 04 31.47 +26 44 00.9 – V C40
2021-10-30 19:23:56 S 03 02 24.060 +27 01 51.64 – V C57
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)