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 11:13:56 S 03 02 20.993 +27 10 51.96 – V C57
2021-10-31 11:23:56 S 03 02 20.998 +27 10 56.57 – V C57
2021-10-31 11:33:56 S 03 02 20.990 +27 11 02.47 – V C57
2021-10-31 11:43:56 S 03 02 20.969 +27 11 09.02 – V C57
2021-10-31 11:53:55 S 03 02 20.933 +27 11 13.74 – V C57
2021-10-31 12:03:56 S 03 02 20.923 +27 11 18.67 – V C57
2021-10-31 12:13:56 S 03 02 20.909 +27 11 24.79 – V C57
2021-10-31 12:23:56 S 03 02 20.880 +27 11 30.37 – V C57
2021-10-31 12:33:56 S 03 02 20.878 +27 11 36.53 – V C57
2021-10-31 12:43:56 S 03 02 20.779 +27 11 41.71 – V C57
2021-10-31 12:53:56 S 03 02 20.772 +27 11 48.41 – V C57
2021-10-31 13:03:56 S 03 02 20.743 +27 11 53.34 – V C57
2021-10-31 13:13:56 S 03 02 20.731 +27 11 58.45 – V C57
2021-10-31 13:23:55 S 03 02 20.738 +27 12 03.42 – V C57
2021-10-31 13:33:56 S 03 02 20.758 +27 12 10.01 – V C57
2021-10-31 13:43:56 S 03 02 20.806 +27 12 15.37 – V C57
2021-10-31 13:53:56 S 03 02 20.777 +27 12 19.87 – V C57
2021-10-31 14:03:56 S 03 02 20.846 +27 12 25.88 – V C57
2021-10-31 14:13:56 S 03 02 20.791 +27 12 33.08 – V C57
2021-10-31 14:23:56 S 03 02 20.748 +27 12 37.37 – V C57
2021-10-31 14:33:56 S 03 02 20.746 +27 12 42.77 – V C57
2021-10-31 14:43:56 S 03 02 20.743 +27 12 48.42 – V C57
2021-10-31 14:53:55 S 03 02 20.690 +27 12 54.50 – V C57
2021-10-31 15:03:56 S 03 02 20.681 +27 12 58.93 – V C57
2021-10-31 15:13:56 S 03 02 20.594 +27 13 04.73 – V C57
2021-10-31 15:23:56 S 03 02 20.582 +27 13 10.38 – V C57
2021-10-31 15:33:56 S 03 02 20.594 +27 13 16.28 – V C57
2021-10-31 15:43:56 S 03 02 20.554 +27 13 20.89 – V C57
2021-10-31 15:53:56 S 03 02 20.532 +27 13 25.36 – V C57
2021-10-31 16:03:56 S 03 02 20.626 +27 13 33.31 – V C57
2021-10-31 16:13:56 S 03 02 20.652 +27 13 38.64 – V C57
2021-10-31 16:23:55 S 03 02 20.659 +27 13 42.82 – V C57
2021-10-31 16:33:56 S 03 02 20.616 +27 13 48.36 – V C57
2021-10-31 16:43:56 S 03 02 20.597 +27 13 55.34 – V C57
2021-10-31 16:53:56 S 03 02 20.561 +27 14 01.32 – V C57
2021-10-31 17:03:56 S 03 02 20.546 +27 14 05.68 – V C57
2021-10-31 17:13:56 S 03 02 20.561 +27 14 10.72 – V C57
2021-10-31 17:23:56 S 03 02 20.551 +27 14 17.41 – V C57
2021-10-31 17:33:55 S 03 02 20.520 +27 14 22.92 – V C57
2021-10-31 17:36:28 C 03 04 53.84 +26 59 34.1 – V C40
2021-10-31 17:43:56 S 03 02 20.532 +27 14 28.18 – V C57
2021-10-31 17:53:55 S 03 02 20.486 +27 14 34.04 – V C57
2021-10-31 18:03:24 C 03 04 54.30 +26 59 46.3 – Y 557
2021-10-31 18:03:56 S 03 02 20.498 +27 14 39.91 – V C57
2021-10-31 18:13:56 S 03 02 20.462 +27 14 45.02 – V C57
2021-10-31 18:23:56 S 03 02 20.506 +27 14 50.28 – V C57
2021-10-31 18:33:56 S 03 02 20.525 +27 14 55.97 – V C57
2021-10-31 18:43:56 S 03 02 20.563 +27 15 02.27 – V C57
2021-10-31 18:53:56 S 03 02 20.558 +27 15 06.70 – V C57
2021-10-31 19:03:55 S 03 02 20.515 +27 15 12.42 – 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)