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
2021-12-04 12:31:39 C 04 43 18.46 +59 13 18.7 – q V40
2021-12-04 12:34:01 C 04 43 20.58 +59 13 35.1 – q V40
2021-12-04 12:37:41 C 04 43 23.93 +59 14 00.0 – q V40
2021-12-04 16:00:04 C 04 47 20.66 +59 39 40.7 – V C40
2021-12-04 16:02:29 C 04 47 22.93 +59 40 00.6 – V C40
2021-12-04 16:06:08 C 04 47 26.34 +59 40 30.8 – V C40
2021-12-04 16:07:20 C 04 47 27.48 +59 40 40.7 – V C40
2021-12-04 16:08:31 C 04 47 28.60 +59 40 50.6 – V C40
2021-12-04 16:12:10 C 04 47 32.01 +59 41 20.8 – V C40
2021-12-04 16:20:38 C 04 47 39.95 +59 42 30.7 – V C40
2021-12-04 16:21:50 C 04 47 41.08 +59 42 40.7 – V C40
2021-12-04 16:23:02 C 04 47 42.20 +59 42 50.8 – V C40
2021-12-04 16:24:15 C 04 47 43.32 +59 43 00.5 – V C40
2021-12-04 16:27:06 C 04 47 45.99 +59 43 24.1 – V C40
2021-12-04 16:28:47 C 04 47 47.57 +59 43 38.1 – V C40
2021-12-04 16:35:10 C 04 47 53.54 +59 44 30.7 – V C40
2021-12-04 16:35:53 C 04 47 54.21 +59 44 36.7 – V C40
2021-12-04 16:36:34 C 04 47 54.86 +59 44 42.6 – V C40
2021-12-04 16:37:18 C 04 47 55.52 +59 44 48.4 – V C40
2021-12-04 16:38:00 C 04 47 56.17 +59 44 54.3 – V C40
2021-12-04 16:38:42 C 04 47 56.85 +59 45 00.1 – V C40
2021-12-04 16:39:25 C 04 47 57.52 +59 45 05.9 – V C40
2021-12-04 16:40:08 C 04 47 58.16 +59 45 11.9 – V C40
2021-12-04 16:40:49 C 04 47 58.81 +59 45 17.6 – V C40
2021-12-04 16:41:32 C 04 47 59.49 +59 45 23.6 – V C40
2021-12-04 16:42:15 C 04 48 00.15 +59 45 29.3 – V C40
2021-12-04 16:42:57 C 04 48 00.81 +59 45 35.3 – V C40
2021-12-04 16:44:23 C 04 48 02.14 +59 45 47.1 – V C40
2021-12-04 16:45:06 C 04 48 02.78 +59 45 52.9 – V C40
2021-12-04 16:45:47 C 04 48 03.46 +59 45 58.8 – V C40
2021-12-04 16:46:31 C 04 48 04.12 +59 46 04.7 – V C40
2021-12-04 16:47:13 C 04 48 04.77 +59 46 10.6 – V C40
2021-12-04 16:47:55 C 04 48 05.43 +59 46 16.3 – V C40
2021-12-04 16:48:38 C 04 48 06.10 +59 46 22.0 – V C40
2021-12-04 16:49:21 C 04 48 06.77 +59 46 28.0 – V C40
2021-12-04 16:50:02 C 04 48 07.42 +59 46 33.8 – V C40
2021-12-04 16:50:45 C 04 48 08.08 +59 46 39.8 – V C40
2021-12-04 16:51:29 C 04 48 08.74 +59 46 45.6 – V C40
2021-12-04 16:52:11 C 04 48 09.41 +59 46 51.6 – V C40
2021-12-04 16:52:53 C 04 48 10.06 +59 46 57.3 – V C40
2021-12-04 17:01:01 C 04 48 17.62 +59 48 04.5 – V C40
2021-12-04 17:01:45 C 04 48 18.31 +59 48 10.6 – V C40
2021-12-04 17:02:28 C 04 48 18.97 +59 48 16.4 – V C40
2021-12-05 20:09:55 C 05 20 26.46 +63 21 03.6 – t B66
2021-12-05 20:56:19 C 05 21 29.95 +63 27 32.2 – t B66
2021-12-05 23:26:39 C 05 24 31.08 +63 48 24.9 – V M44
2021-12-05 23:42:02 C 05 24 52.09 +63 50 14.2 – V M44
2021-12-05 23:58:48 C 05 25 15.67 +63 52 14.1 – V M44
2021-12-06 03:55:22 C 05 32 21.47 +64 22 22.2 – q V40
2021-12-06 03:58:39 C 05 32 25.93 +64 22 47.1 – q V40
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)