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
2021-11-01 02:03:56 s 1 -24600.724 0 +369789.57 4740.0 – C57
2021-11-01 02:09:54 C 03 04 58.21 +27 05 43.7 – Y 557
2021-11-01 02:13:55 S 03 02 20.666 +27 19 08.33 – V C57
2021-11-01 02:13:55 s 1 -24961.884 0 +369696.34 3740.0 – C57
2021-11-01 02:23:56 S 03 02 20.719 +27 19 14.30 – V C57
2021-11-01 02:23:56 s 1 -25322.961 0 +369602.05 2350.0 – C57
2021-11-01 02:33:55 S 03 02 20.686 +27 19 19.67 – V C57
2021-11-01 02:33:55 s 1 -25683.953 0 +369506.72 570.0 – C57
2021-11-01 02:43:56 S 03 02 20.714 +27 19 25.07 – V C57
2021-11-01 02:43:56 s 1 -26044.859 0 +369410.33 8400.0 – C57
2021-11-01 02:53:55 S 03 02 20.758 +27 19 29.96 – V C57
2021-11-01 02:53:55 s 1 -26405.680 0 +369312.90 5830.0 – C57
2021-11-01 03:03:56 S 03 02 20.861 +27 19 36.70 – V C57
2021-11-01 03:03:56 s 1 -26766.412 0 +369214.42 2860.0 – C57
2021-11-01 03:13:56 S 03 02 20.818 +27 19 41.52 – V C57
2021-11-01 03:13:56 s 1 -27127.056 0 +369114.88 9490.0 – C57
2021-11-01 03:20:01 C 03 04 58.86 +27 06 30.9 – Y 557
2021-11-01 03:23:56 S 03 02 20.820 +27 19 46.24 – V C57
2021-11-01 03:23:56 s 1 -27487.611 0 +369014.30 5710.0 – C57
2021-11-01 03:33:56 S 03 02 20.818 +27 19 51.85 – V C57
2021-11-01 03:33:56 s 1 -27848.074 0 +368912.67 1510.0 – C57
2021-11-01 03:43:55 S 03 02 20.858 +27 19 58.44 – V C57
2021-11-01 03:43:55 s 1 -28208.446 0 +368809.98 6910.0 – C57
2021-11-01 03:53:56 S 03 02 20.808 +27 20 04.20 – V C57
2021-11-01 03:53:56 s 1 -28568.724 0 +368706.25 1880.0 – C57
2021-11-01 04:03:55 S 03 02 20.777 +27 20 08.34 – V C57
2021-11-01 04:03:55 s 1 -28928.909 0 +368601.46 6430.0 – C57
2021-11-01 04:13:56 S 03 02 20.878 +27 20 14.39 – V C57
2021-11-01 04:13:56 s 1 -29288.999 0 +368495.63 550.0 – C57
2021-11-01 04:23:55 S 03 02 20.842 +27 20 21.01 – V C57
2021-11-01 04:23:55 s 1 -29648.992 0 +368388.74 4240.0 – C57
2021-11-01 04:24:18 C 03 04 59.63 +27 07 13.7 – Y 557
2021-11-01 04:33:56 S 03 02 20.880 +27 20 24.97 – V C57
2021-11-01 04:33:56 s 1 -30008.888 0 +368280.79 7500.0 – C57
2021-11-01 04:43:56 S 03 02 20.885 +27 20 30.59 – V C57
2021-11-01 04:43:56 s 1 -30368.686 0 +368171.80 310.0 – C57
2021-11-01 04:53:56 S 03 02 21.005 +27 20 35.45 – V C57
2021-11-01 04:53:56 s 1 -30728.384 0 +368061.75 2690.0 – C57
2021-11-01 05:03:56 S 03 02 21.017 +27 20 42.07 – V C57
2021-11-01 05:03:56 s 1 -31087.982 0 +367950.65 4610.0 – C57
2021-11-01 05:13:55 S 03 02 21.038 +27 20 48.12 – V C57
2021-11-01 05:13:55 s 1 -31447.479 0 +367838.50 6090.0 – C57
2021-11-01 05:23:56 S 03 02 21.029 +27 20 52.08 – V C57
2021-11-01 05:23:56 s 1 -31806.872 0 +367725.29 7110.0 – C57
2021-11-01 05:33:55 S 03 02 21.014 +27 20 58.02 – V C57
2021-11-01 05:33:55 s 1 -32166.162 0 +367611.03 7680.0 – C57
2021-11-01 05:43:56 S 03 02 20.998 +27 21 04.32 – V C57
2021-11-01 05:43:56 s 1 -32525.347 0 +367495.71 7780.0 – C57
2021-11-01 05:53:55 S 03 02 21.070 +27 21 08.10 – V C57
2021-11-01 05:53:55 s 1 -32884.426 0 +367379.34 7420.0 – 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)