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
2021-10-20 20:03:56 S 02 57 56.071 +24 20 31.16 – V C57
2021-10-20 20:03:56 s 1 -114096.89 2 +313868.52 9240.0 – C57
2021-10-20 20:13:56 S 02 57 56.148 +24 20 34.80 – V C57
2021-10-20 20:13:56 s 1 -114404.09 6 +313508.44 3490.0 – C57
2021-10-20 20:23:56 S 02 57 56.256 +24 20 38.69 – V C57
2021-10-20 20:23:56 s 1 -114710.86 7 +313147.16 6120.0 – C57
2021-10-20 20:33:56 S 02 57 56.654 +24 20 43.08 – V C57
2021-10-20 20:33:56 s 1 -115017.20 3 +312784.69 7140.0 – C57
2021-10-20 20:43:56 S 02 57 56.966 +24 20 47.11 – V C57
2021-10-20 20:43:56 s 1 -115323.10 4 +312421.02 6540.0 – C57
2021-10-20 20:53:56 S 02 57 56.904 +24 20 51.94 – V C57
2021-10-20 20:53:56 s 1 -115628.56 6 +312056.16 4310.0 – C57
2021-10-20 21:13:56 S 02 57 57.458 +24 20 57.34 – V C57
2021-10-20 21:13:56 s 1 -116238.16 7 +311322.84 4930.0 – C57
2021-10-20 21:33:56 S 02 57 57.535 +24 21 05.00 – V C57
2021-10-20 21:33:56 s 1 -116845.98 9 +310584.73 8940.0 – C57
2021-10-20 22:23:56 S 02 57 58.958 +24 21 25.92 – V C57
2021-10-20 22:23:56 s 1 -118357.65 7 +308718.42 9710.0 – C57
2021-10-20 22:33:56 S 02 57 59.369 +24 21 29.70 – V C57
2021-10-20 22:33:56 s 1 -118658.62 2 +308341.54 790.0 – C57
2021-10-20 22:43:56 S 02 57 59.508 +24 21 29.41 – V C57
2021-10-20 22:43:56 s 1 -118959.12 6 +307963.46 150.0 – C57
2021-10-20 22:53:56 S 02 57 59.498 +24 21 35.86 – V C57
2021-10-20 22:53:56 s 1 -119259.16 6 +307584.17 7800.0 – C57
2021-10-20 23:03:56 S 02 57 59.846 +24 21 39.28 – V C57
2021-10-20 23:03:56 s 1 -119558.74 0 +307203.67 3730.0 – C57
2021-10-20 23:13:56 S 02 58 00.060 +24 21 44.71 – V C57
2021-10-20 23:13:56 s 1 -119857.84 7 +306821.97 7920.0 – C57
2021-10-20 23:23:56 S 02 58 00.422 +24 21 47.84 – V C57
2021-10-20 23:23:56 s 1 -120156.48 4 +306439.05 380.0 – C57
2021-10-20 23:33:56 S 02 58 00.569 +24 21 52.38 – V C57
2021-10-20 23:33:56 s 1 -120454.64 9 +306054.92 1080.0 – C57
2021-10-20 23:43:56 S 02 58 00.660 +24 21 55.33 – V C57
2021-10-20 23:43:56 s 1 -120752.34 0 +305669.58 40.0 – C57
2021-10-20 23:53:56 S 02 58 00.900 +24 21 59.15 – V C57
2021-10-20 23:53:56 s 1 -121049.55 5 +305283.02 7230.0 – C57
2021-10-21 00:03:56 S 02 58 01.140 +24 22 04.01 – V C57
2021-10-21 00:03:56 s 1 -121346.29 1 +304895.25 2650.0 – C57
2021-10-21 00:13:56 S 02 58 01.399 +24 22 06.89 – V C57
2021-10-21 00:13:56 s 1 -121642.54 7 +304506.27 6290.0 – C57
2021-10-21 00:23:56 S 02 58 01.646 +24 22 11.10 – V C57
2021-10-21 00:23:56 s 1 -121938.31 9 +304116.06 8140.0 – C57
2021-10-21 00:33:56 S 02 58 01.795 +24 22 15.42 – V C57
2021-10-21 00:33:56 s 1 -122233.60 7 +303724.64 8210.0 – C57
2021-10-21 00:43:56 S 02 58 02.030 +24 22 19.45 – V C57
2021-10-21 00:43:56 s 1 -122528.40 7 +303332.00 6470.0 – C57
2021-10-21 00:53:56 S 02 58 02.323 +24 22 23.16 – V C57
2021-10-21 00:53:56 s 1 -122822.71 7 +302938.14 2920.0 – C57
2021-10-21 01:03:56 S 02 58 02.532 +24 22 26.58 – V C57
2021-10-21 01:03:56 s 1 -123116.53 6 +302543.06 7560.0 – 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)