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
2021-10-31 02:43:56 s 1 +26300.199 0 +372579.97 3290.0 – C57
2021-10-31 02:53:56 S 03 02 22.284 +27 06 08.46 – V C57
2021-10-31 02:53:56 s 1 +25937.548 0 +372631.98 6340.0 – C57
2021-10-31 03:01:40 C 03 04 40.23 +26 49 25.0 – t V40
2021-10-31 03:03:56 S 03 02 22.222 +27 06 15.34 – V C57
2021-10-31 03:03:56 s 1 +25574.837 0 +372682.96 9270.0 – C57
2021-10-31 03:13:56 S 03 02 22.246 +27 06 21.17 – V C57
2021-10-31 03:13:56 s 1 +25212.068 0 +372732.91 2080.0 – C57
2021-10-31 03:23:56 S 03 02 22.195 +27 06 25.85 – V C57
2021-10-31 03:23:56 s 1 +24849.239 0 +372781.82 4780.0 – C57
2021-10-31 03:24:02 C 03 04 35.83 +26 49 28.9 – Y 557
2021-10-31 03:33:56 S 03 02 22.178 +27 06 32.18 – V C57
2021-10-31 03:33:56 s 1 +24486.354 0 +372829.70 7370.0 – C57
2021-10-31 03:43:56 S 03 02 22.193 +27 06 38.38 – V C57
2021-10-31 03:43:56 s 1 +24123.413 0 +372876.54 9860.0 – C57
2021-10-31 03:53:56 S 03 02 22.140 +27 06 43.42 – V C57
2021-10-31 03:53:56 s 1 +23760.416 0 +372922.35 2240.0 – C57
2021-10-31 03:56:30 C 03 04 40.74 +26 50 07.0 – t V40
2021-10-31 04:03:56 S 03 02 22.128 +27 06 48.35 – V C57
2021-10-31 04:03:56 s 1 +23397.366 0 +372967.12 4520.0 – C57
2021-10-31 04:13:56 S 03 02 22.061 +27 06 55.22 – V C57
2021-10-31 04:13:56 s 1 +23034.262 0 +373010.86 6710.0 – C57
2021-10-31 04:23:56 S 03 02 22.018 +27 07 00.30 – V C57
2021-10-31 04:23:56 s 1 +22671.107 0 +373053.57 8800.0 – C57
2021-10-31 04:25:14 C 03 04 36.58 +26 50 08.4 – Y 557
2021-10-31 04:33:56 S 03 02 21.977 +27 07 06.06 – V C57
2021-10-31 04:33:56 s 1 +22307.900 0 +373095.24 810.0 – C57
2021-10-31 04:43:56 S 03 02 21.965 +27 07 11.03 – V C57
2021-10-31 04:43:56 s 1 +21944.644 0 +373135.88 2730.0 – C57
2021-10-31 04:53:22 C 03 04 41.13 +26 50 50.1 – t V40
2021-10-31 04:53:56 S 03 02 21.888 +27 07 17.04 – V C57
2021-10-31 04:53:56 s 1 +21581.339 0 +373175.49 4570.0 – C57
2021-10-31 05:03:56 S 03 02 21.866 +27 07 23.12 – V C57
2021-10-31 05:03:56 s 1 +21217.985 0 +373214.06 6330.0 – C57
2021-10-31 05:13:56 S 03 02 21.828 +27 07 27.98 – V C57
2021-10-31 05:13:56 s 1 +20854.585 0 +373251.60 8020.0 – C57
2021-10-31 05:23:56 S 03 02 21.792 +27 07 33.74 – V C57
2021-10-31 05:23:56 s 1 +20491.139 0 +373288.10 9630.0 – C57
2021-10-31 05:33:56 S 03 02 21.770 +27 07 40.37 – V C57
2021-10-31 05:33:56 s 1 +20127.648 0 +373323.57 1180.0 – C57
2021-10-31 05:43:56 S 03 02 21.727 +27 07 45.37 – V C57
2021-10-31 05:43:56 s 1 +19764.114 0 +373358.00 2670.0 – C57
2021-10-31 05:47:17 C 03 04 41.37 +26 51 30.3 – t V40
2021-10-31 05:53:56 S 03 02 21.708 +27 07 50.84 – V C57
2021-10-31 05:53:56 s 1 +19400.536 0 +373391.41 4090.0 – C57
2021-10-31 06:03:56 S 03 02 21.725 +27 07 56.53 – V C57
2021-10-31 06:03:56 s 1 +19036.917 0 +373423.78 5460.0 – C57
2021-10-31 06:13:56 S 03 02 21.655 +27 08 03.37 – V C57
2021-10-31 06:13:56 s 1 +18673.257 0 +373455.11 6780.0 – C57
2021-10-31 06:23:56 S 03 02 21.754 +27 08 08.77 – 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)