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
2021-11-08 11:54:41 C 03 07 51.58 +29 33 18.6 t V40
2021-11-08 18:31:52 C 03 08 05.22 +29 39 42.1 V C40
2021-11-08 18:50:56 C 03 08 05.37 +29 40 01.9 V C40
2021-11-08 18:52:29 C 03 08 05.38 +29 40 03.5 V C40
2021-11-08 18:54:00 C 03 08 05.40 +29 40 05.1 V C40
2021-11-08 18:55:33 C 03 08 05.41 +29 40 06.7 V C40
2021-11-08 18:57:04 C 03 08 05.41 +29 40 08.2 V C40
2021-11-08 18:58:37 C 03 08 05.43 +29 40 09.9 V C40
2021-11-08 19:00:08 C 03 08 05.43 +29 40 11.2 V C40
2021-11-08 19:01:39 C 03 08 05.44 +29 40 13.0 V C40
2021-11-08 19:03:12 C 03 08 05.45 +29 40 14.6 V C40
2021-11-08 19:04:43 C 03 08 05.46 +29 40 16.1 V C40
2021-11-08 19:06:16 C 03 08 05.48 +29 40 17.7 V C40
2021-11-08 19:07:47 C 03 08 05.48 +29 40 19.3 V C40
2021-11-08 19:10:50 C 03 08 05.50 +29 40 22.5 V C40
2021-11-08 19:12:23 C 03 08 05.51 +29 40 24.0 V C40
2021-11-08 19:13:54 C 03 08 05.52 +29 40 25.5 V C40
2021-11-08 19:15:27 C 03 08 05.53 +29 40 27.1 V C40
2021-11-08 20:07:02 C 03 08 05.81 +29 41 19.6 V C40
2021-11-08 20:08:33 C 03 08 05.82 +29 41 21.1 V C40
2021-11-08 20:10:05 C 03 08 05.83 +29 41 22.6 V C40
2021-11-08 20:11:36 C 03 08 05.83 +29 41 24.2 V C40
2021-11-08 20:13:09 C 03 08 05.84 +29 41 25.7 V C40
2021-11-08 20:14:40 C 03 08 05.85 +29 41 27.3 V C40
2021-11-08 20:17:01 C 03 08 05.87 +29 41 29.7 V C40
2021-11-08 20:18:34 C 03 08 05.87 +29 41 31.2 V C40
2021-11-08 20:20:05 C 03 08 05.88 +29 41 32.7 V C40
2021-11-08 20:21:36 C 03 08 05.87 +29 41 34.3 V C40
2021-11-08 20:23:09 C 03 08 05.89 +29 41 35.7 V C40
2021-11-08 20:24:40 C 03 08 05.90 +29 41 37.3 V C40
2021-11-08 20:26:13 C 03 08 05.91 +29 41 38.9 V C40
2021-11-08 20:29:17 C 03 08 05.93 +29 41 42.0 V C40
2021-11-08 20:36:55 C 03 08 05.94 +29 41 49.7 V C40
2021-11-09 05:19:00 C 03 08 17.40 +29 50 35.8 V 703
2021-11-09 05:26:37 C 03 08 17.43 +29 50 43.7 V 703
2021-11-09 05:34:15 C 03 08 17.46 +29 50 51.8 V 703
2021-11-09 05:41:52 C 03 08 17.53 +29 51 00.3 V 703
2021-11-09 08:37:13 C 03 08 21.21 +29 54 07.5 V T05
2021-11-09 09:13:41 C 03 08 21.24 +29 54 45.8 V T05
2021-11-09 09:18:20 C 03 08 21.24 +29 54 50.7 V T05
2021-11-09 09:22:57 C 03 08 21.24 +29 54 55.4 V T05
2021-11-09 18:49:19 C 03 08 28.52 +30 04 10.0 V D29
2021-11-09 19:09:40 C 03 08 28.66 +30 04 29.1 V D29
2021-11-09 19:30:02 C 03 08 28.83 +30 04 48.0 V D29
2021-11-09 22:44:57 C 03 08 36.77 +30 07 59.4 V K85
2021-11-09 22:55:25 C 03 08 36.84 +30 08 10.4 V K85
2021-11-09 23:06:53 C 03 08 36.91 +30 08 22.0 V K85
2021-11-10 10:02:35 C 03 08 46.86 +30 19 59.8 t V40
2021-11-10 10:07:54 C 03 08 46.88 +30 20 05.0 t V40
2021-11-10 10:13:16 C 03 08 46.94 +30 20 10.1 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)