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
2021-11-10 10:18:39 C 03 08 46.99 +30 20 15.1 t V40
2021-11-10 10:23:57 C 03 08 47.05 +30 20 20.1 t V40
2021-11-10 10:29:21 C 03 08 47.09 +30 20 25.4 t V40
2021-11-10 10:34:45 C 03 08 47.15 +30 20 30.6 t V40
2021-11-10 10:40:35 C 03 08 47.20 +30 20 36.1 t V40
2021-11-10 11:52:49 C 03 08 48.21 +30 21 44.0 t V40
2021-11-10 11:58:20 C 03 08 48.30 +30 21 49.1 t V40
2021-11-10 12:03:55 C 03 08 48.37 +30 21 54.6 t V40
2021-11-10 12:06:46 C 03 08 48.43 +30 21 57.2 t V40
2021-11-10 21:25:38 C 03 09 06.59 +30 31 53.8 V K85
2021-11-10 21:33:08 C 03 09 06.65 +30 32 02.4 V K85
2021-11-10 21:38:30 C 03 09 06.69 +30 32 08.2 V K85
2021-11-11 08:04:18 C 03 09 17.61 +30 43 58.3 q V40
2021-11-11 08:10:06 C 03 09 17.64 +30 44 04.1 q V40
2021-11-11 08:15:31 C 03 09 17.66 +30 44 09.8 q V40
2021-11-11 08:20:59 C 03 09 17.68 +30 44 15.6 q V40
2021-11-11 08:26:24 C 03 09 17.71 +30 44 21.3 q V40
2021-11-11 08:32:07 C 03 09 17.73 +30 44 27.3 q V40
2021-11-11 10:34:21 C 03 09 22.04 +30 46 58.8 V T08
2021-11-11 10:39:39 C 03 09 22.05 +30 47 04.6 V T08
2021-11-11 10:53:55 C 03 09 22.07 +30 47 20.1 V T08
2021-11-11 11:03:34 C 03 09 19.12 +30 47 01.4 q V40
2021-11-11 11:09:17 C 03 09 19.19 +30 47 07.3 q V40
2021-11-11 11:12:31 C 03 09 22.09 +30 47 40.3 V T08
2021-11-11 11:15:01 C 03 09 19.27 +30 47 12.6 q V40
2021-11-11 11:20:23 C 03 09 19.35 +30 47 18.0 q V40
2021-11-11 11:25:48 C 03 09 19.44 +30 47 23.2 q V40
2021-11-11 18:37:13 C 03 09 30.80 +30 55 37.8 V D29
2021-11-11 19:04:22 C 03 09 36.45 +30 55 58.0 V C40
2021-11-11 19:05:57 C 03 09 36.46 +30 56 00.0 V C40
2021-11-11 19:07:32 C 03 09 36.47 +30 56 01.8 V C40
2021-11-11 19:09:06 C 03 09 36.49 +30 56 03.6 V C40
2021-11-11 19:10:39 C 03 09 36.50 +30 56 05.6 V C40
2021-11-11 19:12:14 C 03 09 36.51 +30 56 07.3 V C40
2021-11-11 19:13:48 C 03 09 36.53 +30 56 09.3 V C40
2021-11-11 19:15:23 C 03 09 36.55 +30 56 11.0 V C40
2021-11-11 19:16:58 C 03 09 36.56 +30 56 12.9 V C40
2021-11-11 19:17:57 C 03 09 31.19 +30 56 20.1 V D29
2021-11-11 19:18:32 C 03 09 36.57 +30 56 14.8 V C40
2021-11-11 19:20:05 C 03 09 36.59 +30 56 16.6 V C40
2021-11-11 19:21:40 C 03 09 36.60 +30 56 18.5 V C40
2021-11-11 19:23:14 C 03 09 36.61 +30 56 20.5 V C40
2021-11-11 19:24:48 C 03 09 36.63 +30 56 22.3 V C40
2021-11-11 19:26:23 C 03 09 36.64 +30 56 24.2 V C40
2021-11-11 19:27:58 C 03 09 36.66 +30 56 26.0 V C40
2021-11-11 19:29:32 C 03 09 36.67 +30 56 27.9 V C40
2021-11-11 19:31:05 C 03 09 36.68 +30 56 29.7 V C40
2021-11-11 19:32:40 C 03 09 36.69 +30 56 31.6 V C40
2021-11-11 19:34:14 C 03 09 36.71 +30 56 33.4 V C40
2021-11-11 19:35:49 C 03 09 36.72 +30 56 35.2 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)