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
2021-11-17 19:34:37 C 03 14 15.50 +34 12 18.4 V C40
2021-11-17 19:36:08 C 03 14 15.53 +34 12 21.0 V C40
2021-11-17 20:19:32 C 03 14 16.50 +34 13 33.6 V C40
2021-11-17 20:24:05 C 03 14 16.61 +34 13 41.1 V C40
2021-11-17 20:25:36 C 03 14 16.64 +34 13 43.7 V C40
2021-11-17 20:27:08 C 03 14 16.67 +34 13 46.2 V C40
2021-11-17 20:28:39 C 03 14 16.70 +34 13 48.7 V C40
2021-11-17 20:30:09 C 03 14 16.73 +34 13 51.2 V C40
2021-11-17 20:31:41 C 03 14 16.77 +34 13 53.8 V C40
2021-11-17 20:33:12 C 03 14 16.81 +34 13 56.1 V C40
2021-11-17 20:34:42 C 03 14 16.84 +34 13 58.7 V C40
2021-11-17 20:36:14 C 03 14 16.87 +34 14 01.2 V C40
2021-11-17 20:37:45 C 03 14 16.90 +34 14 03.7 V C40
2021-11-17 20:39:16 C 03 14 16.94 +34 14 06.3 V C40
2021-11-17 20:40:48 C 03 14 16.98 +34 14 08.7 V C40
2021-11-17 20:42:19 C 03 14 17.01 +34 14 11.3 V C40
2021-11-17 20:43:49 C 03 14 17.04 +34 14 13.7 V C40
2021-11-17 20:49:55 C 03 14 17.17 +34 14 23.7 V C40
2021-11-18 20:01:03 C 03 15 23.26 +34 53 43.9 V C40
2021-11-18 20:02:35 C 03 15 23.31 +34 53 46.6 V C40
2021-11-18 20:04:05 C 03 15 23.35 +34 53 49.3 V C40
2021-11-18 20:07:08 C 03 15 23.42 +34 53 54.8 V C40
2021-11-18 20:08:38 C 03 15 23.46 +34 53 57.3 V C40
2021-11-18 20:10:09 C 03 15 23.50 +34 54 00.1 V C40
2021-11-18 20:11:42 C 03 15 23.55 +34 54 02.9 V C40
2021-11-18 20:14:43 C 03 15 23.63 +34 54 08.4 V C40
2021-11-18 20:16:15 C 03 15 23.66 +34 54 11.0 V C40
2021-11-18 20:17:45 C 03 15 23.71 +34 54 13.6 V C40
2021-11-18 20:19:16 C 03 15 23.74 +34 54 16.4 V C40
2021-11-18 20:23:51 C 03 15 23.87 +34 54 24.5 V C40
2021-11-18 20:25:22 C 03 15 23.90 +34 54 27.2 V C40
2021-11-19 04:33:43 C 03 15 51.02 +35 09 16.0 q V40
2021-11-19 04:42:12 C 03 15 51.24 +35 09 31.6 q V40
2021-11-19 04:50:19 C 03 15 51.43 +35 09 46.7 q V40
2021-11-19 04:55:39 C 03 15 51.56 +35 09 56.7 q V40
2021-11-21 16:18:12 C 03 19 31.86 +37 07 38.9 V M44
2021-11-21 16:25:26 C 03 19 32.20 +37 07 56.5 V M44
2021-11-21 16:49:11 C 03 19 33.28 +37 08 51.5 V M44
2021-11-21 19:18:45 C 03 19 40.81 +37 13 54.4 V C40
2021-11-21 19:20:17 C 03 19 40.89 +37 13 57.7 V C40
2021-11-21 19:21:50 C 03 19 40.95 +37 14 01.4 V C40
2021-11-21 19:23:23 C 03 19 41.03 +37 14 04.7 V C40
2021-11-21 19:24:55 C 03 19 41.10 +37 14 08.4 V C40
2021-11-21 19:26:28 C 03 19 41.16 +37 14 11.7 V C40
2021-11-21 19:27:59 C 03 19 41.24 +37 14 15.2 V C40
2021-11-21 19:29:33 C 03 19 41.30 +37 14 18.8 V C40
2021-11-21 19:31:04 C 03 19 41.38 +37 14 22.2 V C40
2021-11-21 19:32:38 C 03 19 41.45 +37 14 25.8 V C40
2021-11-21 19:34:09 C 03 19 41.52 +37 14 29.2 V C40
2021-11-21 19:35:43 C 03 19 41.59 +37 14 32.7 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)