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
2021-10-26 18:53:56 s 1 +178087.40 6 +119767.82 7410.0 – C57
2021-10-26 19:03:56 S 03 03 12.348 +25 57 15.88 – V C57
2021-10-26 19:03:56 s 1 +178151.39 9 +120585.71 6040.0 – C57
2021-10-26 19:13:56 S 03 03 12.290 +25 57 23.69 – V C57
2021-10-26 19:13:56 s 1 +178213.09 6 +121402.05 6930.0 – C57
2021-10-26 19:23:56 S 03 03 12.257 +25 57 32.08 – V C57
2021-10-26 19:23:56 s 1 +178272.51 1 +122216.84 120.0 – C57
2021-10-26 19:33:56 S 03 03 12.173 +25 57 41.33 – V C57
2021-10-26 19:33:56 s 1 +178329.66 0 +123030.06 5650.0 – C57
2021-10-26 19:43:56 S 03 03 12.166 +25 57 48.67 – V C57
2021-10-26 19:43:56 s 1 +178384.55 5 +123841.73 3590.0 – C57
2021-10-26 19:46:18 C 03 02 53.13 +25 41 25.9 – V C40
2021-10-26 19:47:53 C 03 02 53.15 +25 41 26.9 – V C40
2021-10-26 19:49:27 C 03 02 53.17 +25 41 28.0 – V C40
2021-10-26 19:52:34 C 03 02 53.19 +25 41 30.0 – V C40
2021-10-26 19:53:56 S 03 03 12.072 +25 57 58.25 – V C57
2021-10-26 19:53:56 s 1 +178437.21 1 +124651.85 3980.0 – C57
2021-10-26 19:54:09 C 03 02 53.21 +25 41 31.1 – V C40
2021-10-26 19:57:18 C 03 02 53.23 +25 41 33.1 – V C40
2021-10-26 19:58:52 C 03 02 53.26 +25 41 34.1 – V C40
2021-10-26 20:00:25 C 03 02 53.26 +25 41 35.2 – V C40
2021-10-26 20:02:00 C 03 02 53.29 +25 41 35.9 – V C40
2021-10-26 20:03:34 C 03 02 53.30 +25 41 37.0 – V C40
2021-10-26 20:03:56 S 03 03 12.062 +25 58 05.45 – V C57
2021-10-26 20:03:56 s 1 +178487.64 2 +125460.41 6860.0 – C57
2021-10-26 20:05:09 C 03 02 53.31 +25 41 38.2 – V C40
2021-10-26 20:06:43 C 03 02 53.33 +25 41 39.1 – V C40
2021-10-26 20:09:52 C 03 02 53.36 +25 41 41.1 – V C40
2021-10-26 20:13:00 C 03 02 53.39 +25 41 43.1 – V C40
2021-10-26 20:13:56 S 03 03 11.873 +25 58 13.62 – V C57
2021-10-26 20:13:56 s 1 +178535.86 1 +126267.41 2290.0 – C57
2021-10-26 20:16:09 C 03 02 53.42 +25 41 45.2 – V C40
2021-10-26 20:23:40 C 03 02 53.50 +25 41 50.1 – V C40
2021-10-26 20:23:56 S 03 03 11.736 +25 58 22.48 – V C57
2021-10-26 20:23:56 s 1 +178581.88 3 +127072.86 300.0 – C57
2021-10-26 20:25:14 C 03 02 53.50 +25 41 51.0 – V C40
2021-10-26 20:29:56 C 03 02 53.55 +25 41 53.9 – V C40
2021-10-26 20:33:06 C 03 02 53.58 +25 41 56.2 – V C40
2021-10-26 20:33:56 S 03 03 11.815 +25 58 31.12 – V C57
2021-10-26 20:33:56 s 1 +178625.72 1 +127876.75 950.0 – C57
2021-10-26 20:34:40 C 03 02 53.60 +25 41 57.0 – V C40
2021-10-26 20:37:47 C 03 02 53.61 +25 41 59.1 – V C40
2021-10-26 20:39:22 C 03 02 53.63 +25 42 00.1 – V C40
2021-10-26 20:40:56 C 03 02 53.65 +25 42 01.3 – V C40
2021-10-26 20:42:31 C 03 02 53.67 +25 42 02.1 – V C40
2021-10-26 20:43:56 S 03 03 11.662 +25 58 38.21 – V C57
2021-10-26 20:43:56 s 1 +178667.38 8 +128679.08 4280.0 – C57
2021-10-26 20:44:05 C 03 02 53.67 +25 42 03.3 – V C40
2021-10-26 20:47:13 C 03 02 53.70 +25 42 05.3 – V C40
2021-10-26 20:48:47 C 03 02 53.72 +25 42 06.1 – V C40
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)