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
2021-12-06 04:01:26 C 05 32 30.19 +64 23 10.3 q V40
2021-12-06 04:08:30 C 05 32 41.51 +64 24 12.6 q V40
2021-12-06 04:09:58 C 05 32 45.17 +64 23 55.9 V 703
2021-12-06 04:14:38 C 05 32 50.34 +64 25 01.1 q V40
2021-12-06 04:18:08 C 05 32 57.77 +64 25 05.7 V 703
2021-12-06 04:22:56 C 05 33 03.49 +64 26 13.2 q V40
2021-12-06 04:26:18 C 05 33 10.27 +64 26 13.2 V 703
2021-12-06 04:34:28 C 05 33 22.81 +64 27 22.9 V 703
2021-12-06 20:20:39 n 06 02 23.79 +66 22 24.5 q Z92
2021-12-06 20:35:36 n 06 02 54.22 +66 24 18.4 q Z92
2021-12-06 20:55:43 n 06 03 35.20 +66 26 50.5 q Z92
2021-12-06 21:01:10 C 06 03 26.08 +66 30 55.3 V M44
2021-12-06 21:16:33 C 06 03 55.37 +66 32 42.5 V M44
2021-12-06 21:37:05 C 06 04 34.46 +66 35 03.6 V M44
2021-12-07 09:40:47 C 06 32 03.92 +67 51 27.5 q H45
2021-12-07 09:42:02 C 06 32 06.87 +67 51 34.2 q H45
2021-12-07 09:42:48 C 06 32 08.68 +67 51 38.3 q H45
2021-12-07 09:43:43 C 06 32 10.87 +67 51 43.3 q H45
2021-12-07 09:44:40 C 06 32 13.08 +67 51 48.3 q H45
2021-12-07 09:45:36 C 06 32 15.25 +67 51 53.3 q H45
2021-12-07 15:45:14 C 06 48 50.30 +68 20 03.1 V C40
2021-12-07 15:46:11 C 06 48 52.97 +68 20 08.7 V C40
2021-12-07 15:47:37 C 06 48 56.90 +68 20 16.9 V C40
2021-12-07 15:49:44 C 06 49 02.75 +68 20 29.2 V C40
2021-12-07 15:50:26 C 06 49 04.74 +68 20 33.1 V C40
2021-12-07 15:56:07 C 06 49 20.45 +68 21 06.0 V C40
2021-12-07 15:56:49 C 06 49 22.42 +68 21 10.2 V C40
2021-12-07 15:57:31 C 06 49 24.34 +68 21 14.2 V C40
2021-12-07 16:01:47 C 06 49 36.14 +68 21 38.7 V C40
2021-12-07 16:02:28 C 06 49 38.06 +68 21 42.8 V C40
2021-12-07 16:03:12 C 06 49 40.06 +68 21 47.0 V C40
2021-12-07 16:03:54 C 06 49 41.98 +68 21 50.9 V C40
2021-12-07 16:04:36 C 06 49 43.95 +68 21 54.9 V C40
2021-12-07 16:12:02 C 06 50 04.54 +68 22 37.7 V C40
2021-12-07 18:24:19 C 06 56 06.20 +68 33 16.2 t G12
2021-12-07 18:26:21 C 06 56 12.08 +68 33 26.9 t G12
2021-12-07 18:30:20 C 06 56 23.15 +68 33 47.7 t G12
2021-12-07 18:32:31 C 06 56 29.61 +68 33 59.5 t G12
2021-12-07 18:52:31 C 06 57 27.72 +68 37 31.6 V C40
2021-12-07 18:53:13 C 06 57 29.64 +68 37 35.5 V C40
2021-12-07 18:54:38 C 06 57 33.53 +68 37 43.0 V C40
2021-12-07 18:56:02 C 06 57 37.46 +68 37 50.5 V C40
2021-12-07 18:56:45 C 06 57 39.40 +68 37 54.1 V C40
2021-12-07 18:57:28 C 06 57 41.34 +68 37 58.0 V C40
2021-12-07 18:58:09 C 06 57 43.27 +68 38 01.8 V C40
2021-12-07 18:58:52 C 06 57 45.27 +68 38 05.5 V C40
2021-12-07 18:59:35 C 06 57 47.19 +68 38 09.3 V C40
2021-12-07 19:00:59 C 06 57 51.09 +68 38 16.8 V C40
2021-12-07 19:03:07 C 06 57 56.94 +68 38 28.1 V C40
2021-12-07 19:03:50 C 06 57 58.91 +68 38 31.8 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)