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
2021-11-12 19:44:11 C 03 10 12.46 +31 24 45.5 V C40
2021-11-12 19:45:45 C 03 10 12.48 +31 24 47.6 V C40
2021-11-12 19:47:19 C 03 10 12.49 +31 24 49.5 V C40
2021-11-12 19:48:52 C 03 10 12.50 +31 24 51.6 V C40
2021-11-12 19:50:27 C 03 10 12.51 +31 24 53.4 V C40
2021-11-12 19:52:01 C 03 10 12.53 +31 24 55.3 V C40
2021-11-12 19:53:36 C 03 10 12.55 +31 24 57.3 V C40
2021-11-12 19:55:10 C 03 10 12.56 +31 24 59.2 V C40
2021-11-12 19:56:45 C 03 10 12.57 +31 25 01.0 V C40
2021-11-12 19:58:18 C 03 10 12.59 +31 25 03.1 V C40
2021-11-12 19:59:52 C 03 10 12.60 +31 25 05.0 V C40
2021-11-12 20:01:26 C 03 10 12.62 +31 25 07.0 V C40
2021-11-12 20:03:02 C 03 10 12.63 +31 25 08.8 V C40
2021-11-12 20:07:43 C 03 10 12.67 +31 25 14.5 V C40
2021-11-12 20:09:18 C 03 10 12.69 +31 25 16.4 V C40
2021-11-12 20:10:52 C 03 10 12.70 +31 25 18.4 V C40
2021-11-12 20:12:27 C 03 10 12.71 +31 25 20.5 V C40
2021-11-12 20:14:02 C 03 10 12.73 +31 25 22.4 V C40
2021-11-12 20:15:36 C 03 10 12.74 +31 25 24.2 V C40
2021-11-12 20:17:09 C 03 10 12.76 +31 25 26.2 V C40
2021-11-12 20:18:43 C 03 10 12.78 +31 25 28.1 V C40
2021-11-12 20:20:18 C 03 10 12.78 +31 25 30.1 V C40
2021-11-12 20:26:32 C 03 10 12.84 +31 25 37.7 V C40
2021-11-12 20:31:14 C 03 10 12.87 +31 25 43.4 V C40
2021-11-12 20:32:49 C 03 10 12.88 +31 25 45.2 V C40
2021-11-12 20:34:23 C 03 10 12.90 +31 25 47.2 V C40
2021-11-12 20:35:57 C 03 10 12.91 +31 25 49.3 V C40
2021-11-12 20:37:32 C 03 10 12.93 +31 25 51.1 V C40
2021-11-12 20:39:07 C 03 10 12.94 +31 25 53.0 V C40
2021-11-12 20:40:41 C 03 10 12.96 +31 25 54.8 V C40
2021-11-12 20:42:14 C 03 10 12.97 +31 25 56.7 V C40
2021-11-12 20:43:48 C 03 10 12.98 +31 25 58.7 V C40
2021-11-12 20:45:23 C 03 10 12.99 +31 26 00.6 V C40
2021-11-12 20:46:58 C 03 10 13.00 +31 26 02.7 V C40
2021-11-12 20:48:32 C 03 10 13.01 +31 26 04.5 V C40
2021-11-12 20:50:05 C 03 10 13.03 +31 26 06.4 V C40
2021-11-12 21:26:19 C 03 10 13.85 +31 26 47.6 V 089
2021-11-12 21:29:38 C 03 10 13.87 +31 26 51.6 V 089
2021-11-12 21:38:19 C 03 10 13.95 +31 27 02.2 V 089
2021-11-12 21:41:37 C 03 10 13.98 +31 27 06.1 V 089
2021-11-12 21:50:19 C 03 10 14.06 +31 27 16.7 V 089
2021-11-12 21:53:40 C 03 10 14.09 +31 27 20.8 V 089
2021-11-12 22:29:49 C 03 10 14.43 +31 28 03.4 V 089
2021-11-12 22:38:28 C 03 10 14.51 +31 28 13.6 V 089
2021-11-12 22:41:46 C 03 10 14.55 +31 28 17.4 V 089
2021-11-13 04:17:43 C 03 10 27.42 +31 35 21.7 q V40
2021-11-13 04:23:40 C 03 10 27.46 +31 35 29.1 q V40
2021-11-13 04:29:20 C 03 10 27.51 +31 35 36.4 q V40
2021-11-13 04:35:17 C 03 10 27.56 +31 35 44.1 q V40
2021-11-13 12:38:31 C 03 10 41.81 +31 45 33.4 V D29
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)