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
2021-11-11 19:37:23 C 03 09 36.74 +30 56 37.1 V C40
2021-11-11 19:38:58 C 03 09 36.75 +30 56 39.0 V C40
2021-11-11 19:40:31 C 03 09 36.76 +30 56 40.7 V C40
2021-11-11 19:42:05 C 03 09 36.77 +30 56 42.6 V C40
2021-11-11 19:43:40 C 03 09 36.78 +30 56 44.5 V C40
2021-11-11 19:45:14 C 03 09 36.80 +30 56 46.2 V C40
2021-11-11 19:46:49 C 03 09 36.80 +30 56 48.2 V C40
2021-11-11 19:48:23 C 03 09 36.82 +30 56 50.0 V C40
2021-11-11 19:49:58 C 03 09 36.84 +30 56 51.8 V C40
2021-11-11 19:54:45 C 03 09 31.65 +30 56 58.0 V D29
2021-11-11 20:05:36 C 03 09 36.96 +30 57 10.2 V C40
2021-11-11 20:07:10 C 03 09 36.97 +30 57 12.1 V C40
2021-11-11 20:08:45 C 03 09 36.98 +30 57 13.8 V C40
2021-11-11 20:10:20 C 03 09 36.99 +30 57 15.7 V C40
2021-11-11 20:11:54 C 03 09 37.01 +30 57 17.6 V C40
2021-11-11 20:13:28 C 03 09 37.02 +30 57 19.3 V C40
2021-11-11 20:15:01 C 03 09 37.02 +30 57 21.2 V C40
2021-11-11 20:15:06 C 03 09 31.95 +30 57 18.8 V D29
2021-11-11 20:16:36 C 03 09 37.02 +30 57 23.1 V C40
2021-11-11 20:18:10 C 03 09 37.04 +30 57 24.8 V C40
2021-11-11 20:19:45 C 03 09 37.06 +30 57 26.7 V C40
2021-11-11 20:21:19 C 03 09 37.07 +30 57 28.5 V C40
2021-11-11 20:22:54 C 03 09 37.07 +30 57 30.4 V C40
2021-11-11 20:24:27 C 03 09 37.08 +30 57 32.1 V C40
2021-11-11 20:26:01 C 03 09 37.10 +30 57 33.9 V C40
2021-11-11 20:27:36 C 03 09 37.12 +30 57 35.7 V C40
2021-11-11 20:29:11 C 03 09 37.13 +30 57 37.5 V C40
2021-11-11 20:30:45 C 03 09 37.15 +30 57 39.5 V C40
2021-11-11 20:32:20 C 03 09 37.16 +30 57 41.2 V C40
2021-11-11 20:33:54 C 03 09 37.17 +30 57 43.0 V C40
2021-11-11 20:35:27 C 03 09 37.17 +30 57 44.8 V C40
2021-11-11 20:35:28 C 03 09 32.28 +30 57 39.3 V D29
2021-11-11 20:37:02 C 03 09 37.18 +30 57 46.7 V C40
2021-11-11 20:56:26 C 03 09 39.17 +30 57 57.6 V K85
2021-11-11 21:02:52 C 03 09 39.25 +30 58 05.3 V K85
2021-11-11 21:08:46 C 03 09 39.32 +30 58 12.5 V K85
2021-11-12 04:19:43 C 03 09 50.55 +31 06 50.4 q V40
2021-11-12 04:26:02 C 03 09 50.59 +31 06 57.9 q V40
2021-11-12 04:31:45 C 03 09 50.64 +31 07 04.8 q V40
2021-11-12 04:37:31 C 03 09 50.67 +31 07 11.9 q V40
2021-11-12 05:11:26 C 03 09 51.34 +31 07 49.3 V 703
2021-11-12 05:18:56 C 03 09 51.33 +31 07 58.7 V 703
2021-11-12 05:26:25 C 03 09 51.43 +31 08 07.7 V 703
2021-11-12 05:33:56 C 03 09 51.45 +31 08 18.0 V 703
2021-11-12 08:00:22 C 03 09 56.002 +31 11 19.05 U F52
2021-11-12 08:16:54 C 03 09 56.087 +31 11 39.59 U F52
2021-11-12 08:33:28 C 03 09 56.160 +31 12 00.08 U F52
2021-11-12 08:49:58 C 03 09 56.222 +31 12 20.29 U F52
2021-11-12 19:34:45 C 03 10 12.37 +31 24 33.8 V C40
2021-11-12 19:42:35 C 03 10 12.45 +31 24 43.6 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)