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
2021-11-06 11:53:01 C 03 07 01.07 +28 49 05.1 t V40
2021-11-06 11:55:44 C 03 07 01.10 +28 49 07.2 t V40
2021-11-06 11:58:41 C 03 07 01.12 +28 49 09.5 t V40
2021-11-06 12:01:22 C 03 07 01.15 +28 49 11.4 t V40
2021-11-06 12:04:14 C 03 07 01.18 +28 49 13.9 t V40
2021-11-06 17:41:36 C 03 07 13.49 +28 53 57.1 Y 557
2021-11-06 18:33:27 C 03 07 14.19 +28 54 47.3 Y 557
2021-11-06 19:37:29 C 03 07 14.88 +28 55 48.9 Y 557
2021-11-06 20:44:33 C 03 07 15.41 +28 56 52.6 Y 557
2021-11-06 21:49:54 C 03 07 15.80 +28 57 53.5 Y 557
2021-11-06 22:06:54 C 03 07 15.92 +28 58 08.0 V G34
2021-11-06 22:11:37 C 03 07 15.94 +28 58 12.5 V G34
2021-11-06 22:16:19 C 03 07 15.96 +28 58 16.8 V G34
2021-11-06 22:22:17 C 03 07 15.99 +28 58 22.0 V G34
2021-11-06 22:49:07 C 03 07 16.08 +28 58 47.5 Y 557
2021-11-06 23:57:04 C 03 07 16.39 +28 59 48.2 Y 557
2021-11-07 01:01:06 C 03 07 16.73 +29 00 44.0 Y 557
2021-11-07 02:02:05 C 03 07 17.16 +29 01 36.0 Y 557
2021-11-07 07:10:09 C 03 07 23.63 +29 06 35.8 q H45
2021-11-07 07:12:13 C 03 07 23.63 +29 06 37.6 q H45
2021-11-07 07:14:08 C 03 07 23.63 +29 06 39.3 q H45
2021-11-07 08:59:23 C 03 07 28.01 +29 08 30.6 V T08
2021-11-07 09:02:03 C 03 07 28.01 +29 08 33.1 V T08
2021-11-07 09:06:02 C 03 07 28.01 +29 08 37.0 V T08
2021-11-07 09:41:45 C 03 07 27.98 +29 09 10.8 V T08
2021-11-07 11:00:38 C 03 07 25.13 +29 09 59.6 t V40
2021-11-07 11:06:29 C 03 07 25.19 +29 10 04.1 t V40
2021-11-07 11:11:49 C 03 07 25.23 +29 10 08.7 t V40
2021-11-07 11:17:12 C 03 07 25.30 +29 10 13.0 t V40
2021-11-07 11:35:51 C 03 07 25.51 +29 10 28.6 t V40
2021-11-07 11:42:00 C 03 07 25.57 +29 10 33.2 t V40
2021-11-08 00:20:14 C 03 07 46.55 +29 22 12.8 Z W33
2021-11-08 01:09:58 C 03 07 47.16 +29 23 04.7 Z W33
2021-11-08 01:59:19 C 03 07 47.63 +29 23 55.6 Z W33
2021-11-08 08:24:41 C 03 07 50.65 +29 30 10.6 V U97
2021-11-08 08:30:17 C 03 07 50.67 +29 30 16.0 V U97
2021-11-08 09:15:09 C 03 07 50.79 +29 30 57.1 V U97
2021-11-08 09:20:45 C 03 07 50.83 +29 31 02.1 V U97
2021-11-08 10:48:00 C 03 07 50.80 +29 32 21.7 t V40
2021-11-08 10:53:45 C 03 07 50.86 +29 32 26.1 t V40
2021-11-08 10:59:14 C 03 07 50.91 +29 32 31.1 t V40
2021-11-08 11:04:38 C 03 07 50.97 +29 32 35.4 t V40
2021-11-08 11:10:03 C 03 07 51.03 +29 32 40.2 t V40
2021-11-08 11:15:31 C 03 07 51.08 +29 32 44.8 t V40
2021-11-08 11:20:56 C 03 07 51.15 +29 32 49.7 t V40
2021-11-08 11:26:40 C 03 07 51.22 +29 32 54.3 t V40
2021-11-08 11:32:07 C 03 07 51.25 +29 32 59.4 t V40
2021-11-08 11:37:45 C 03 07 51.33 +29 33 04.0 t V40
2021-11-08 11:43:10 C 03 07 51.42 +29 33 08.7 t V40
2021-11-08 11:49:17 C 03 07 51.49 +29 33 13.8 t V40
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)