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
2021-11-16 18:37:03 C 03 13 14.64 +33 32 51.0 V C40
2021-11-16 18:41:36 C 03 13 14.74 +33 32 58.3 V C40
2021-11-16 18:43:06 C 03 13 14.77 +33 33 00.7 V C40
2021-11-16 18:44:38 C 03 13 14.80 +33 33 03.1 V C40
2021-11-16 18:46:09 C 03 13 14.83 +33 33 05.6 V C40
2021-11-16 18:47:39 C 03 13 14.87 +33 33 08.0 V C40
2021-11-16 18:49:12 C 03 13 14.90 +33 33 10.4 V C40
2021-11-16 18:52:13 C 03 13 14.96 +33 33 15.2 V C40
2021-11-16 20:49:03 C 03 13 17.19 +33 36 18.5 V C40
2021-11-16 20:50:34 C 03 13 17.22 +33 36 20.8 V C40
2021-11-16 20:53:37 C 03 13 17.28 +33 36 25.5 V C40
2021-11-16 20:55:07 C 03 13 17.31 +33 36 27.9 V C40
2021-11-16 20:56:38 C 03 13 17.33 +33 36 30.2 V C40
2021-11-16 20:58:10 C 03 13 17.36 +33 36 32.5 V C40
2021-11-16 20:59:40 C 03 13 17.39 +33 36 34.8 V C40
2021-11-16 21:01:11 C 03 13 17.42 +33 36 37.1 V C40
2021-11-16 21:02:44 C 03 13 17.45 +33 36 39.5 V C40
2021-11-16 21:10:02 C 03 13 18.17 +33 36 48.5 V 089
2021-11-16 21:13:20 C 03 13 18.24 +33 36 53.2 V 089
2021-11-16 21:19:01 C 03 13 18.34 +33 37 01.9 V 089
2021-11-16 21:22:20 C 03 13 18.41 +33 37 07.0 V 089
2021-11-16 21:25:39 C 03 13 18.47 +33 37 12.1 V 089
2021-11-16 21:28:59 C 03 13 18.53 +33 37 17.5 V 089
2021-11-16 21:32:17 C 03 13 18.59 +33 37 22.2 V 089
2021-11-16 21:35:36 C 03 13 18.66 +33 37 27.2 V 089
2021-11-16 21:38:56 C 03 13 18.72 +33 37 32.4 V 089
2021-11-17 02:16:39 C 03 13 35.48 +33 44 45.2 q V40
2021-11-17 02:22:18 C 03 13 35.62 +33 44 54.3 q V40
2021-11-17 02:27:56 C 03 13 35.78 +33 45 04.1 q V40
2021-11-17 02:36:42 C 03 13 36.00 +33 45 18.9 q V40
2021-11-17 17:59:08 C 03 14 14.04 +34 09 11.3 V C23
2021-11-17 18:22:33 C 03 14 14.95 +34 09 52.6 V C23
2021-11-17 18:42:14 C 03 14 15.66 +34 10 27.0 V C23
2021-11-17 18:56:38 C 03 14 14.60 +34 11 14.1 V C40
2021-11-17 19:02:42 C 03 14 14.75 +34 11 24.5 V C40
2021-11-17 19:05:10 C 03 14 16.47 +34 11 07.3 V C23
2021-11-17 19:05:45 C 03 14 14.82 +34 11 29.7 V C40
2021-11-17 19:08:47 C 03 14 14.89 +34 11 34.8 V C40
2021-11-17 19:10:18 C 03 14 14.93 +34 11 37.4 V C40
2021-11-17 19:11:49 C 03 14 14.97 +34 11 39.9 V C40
2021-11-17 19:13:21 C 03 14 15.00 +34 11 42.5 V C40
2021-11-17 19:14:51 C 03 14 15.03 +34 11 45.1 V C40
2021-11-17 19:16:22 C 03 14 15.08 +34 11 47.7 V C40
2021-11-17 19:17:54 C 03 14 15.11 +34 11 50.3 V C40
2021-11-17 19:19:24 C 03 14 15.15 +34 11 52.8 V C40
2021-11-17 19:20:55 C 03 14 15.18 +34 11 55.4 V C40
2021-11-17 19:22:28 C 03 14 15.21 +34 11 57.9 V C40
2021-11-17 19:23:58 C 03 14 15.25 +34 12 00.6 V C40
2021-11-17 19:27:01 C 03 14 15.32 +34 12 05.5 V C40
2021-11-17 19:28:31 C 03 14 15.35 +34 12 08.2 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)