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
2021-11-14 19:32:40 C 03 11 34.59 +32 25 29.7 V C40
2021-11-14 19:34:14 C 03 11 34.61 +32 25 31.8 V C40
2021-11-14 19:35:49 C 03 11 34.64 +32 25 34.0 V C40
2021-11-14 19:37:23 C 03 11 34.66 +32 25 36.2 V C40
2021-11-14 19:40:31 C 03 11 34.70 +32 25 40.5 V C40
2021-11-14 19:43:40 C 03 11 34.74 +32 25 45.0 V C40
2021-11-14 19:45:14 C 03 11 34.76 +32 25 47.0 V C40
2021-11-14 19:46:49 C 03 11 34.78 +32 25 49.3 V C40
2021-11-14 19:49:56 C 03 11 34.83 +32 25 53.5 V C40
2021-11-14 19:51:31 C 03 11 34.85 +32 25 55.8 V C40
2021-11-14 19:53:05 C 03 11 34.86 +32 25 58.0 V C40
2021-11-14 19:54:40 C 03 11 34.89 +32 26 00.2 V C40
2021-11-14 20:00:56 C 03 11 34.97 +32 26 08.9 V C40
2021-11-14 20:04:05 C 03 11 35.01 +32 26 13.3 V C40
2021-11-14 21:11:09 C 03 11 36.40 +32 27 41.8 V 089
2021-11-14 21:14:29 C 03 11 36.44 +32 27 46.4 V 089
2021-11-14 21:17:47 C 03 11 36.48 +32 27 50.7 V 089
2021-11-14 21:21:06 C 03 11 36.53 +32 27 55.3 V 089
2021-11-14 21:24:26 C 03 11 36.57 +32 27 59.7 V 089
2021-11-14 21:27:44 C 03 11 36.61 +32 28 04.3 V 089
2021-11-14 21:31:03 C 03 11 36.66 +32 28 08.8 V 089
2021-11-14 21:34:23 C 03 11 36.70 +32 28 13.3 V 089
2021-11-14 21:37:41 C 03 11 36.74 +32 28 17.7 V 089
2021-11-14 21:41:00 C 03 11 36.79 +32 28 22.2 V 089
2021-11-15 04:07:31 C 03 11 52.66 +32 37 25.4 q V40
2021-11-15 04:18:48 C 03 11 52.81 +32 37 41.5 q V40
2021-11-15 04:30:11 C 03 11 52.95 +32 37 58.1 q V40
2021-11-15 04:48:21 C 03 11 53.17 +32 38 24.3 q V40
2021-11-15 05:03:12 C 03 11 53.88 +32 38 41.9 V G96
2021-11-15 05:11:30 C 03 11 53.98 +32 38 53.8 V G96
2021-11-15 05:19:46 C 03 11 54.09 +32 39 06.1 V G96
2021-11-15 05:28:02 C 03 11 54.17 +32 39 17.9 V G96
2021-11-15 06:00:39 C 03 11 54.52 +32 40 04.7 V 703
2021-11-15 06:08:21 C 03 11 54.60 +32 40 15.6 V 703
2021-11-15 06:16:11 C 03 11 54.68 +32 40 26.6 V 703
2021-11-15 06:24:12 C 03 11 54.76 +32 40 38.0 V 703
2021-11-15 20:28:02 C 03 12 23.83 +33 00 07.1 V 089
2021-11-15 20:31:20 C 03 12 23.90 +33 00 12.2 V 089
2021-11-15 20:34:39 C 03 12 23.97 +33 00 16.7 V 089
2021-11-15 20:37:58 C 03 12 24.02 +33 00 21.4 V 089
2021-11-15 20:41:17 C 03 12 24.08 +33 00 26.5 V 089
2021-11-15 20:44:36 C 03 12 24.12 +33 00 31.1 V 089
2021-11-15 20:47:55 C 03 12 24.19 +33 00 35.9 V 089
2021-11-15 20:51:14 C 03 12 24.24 +33 00 40.7 V 089
2021-11-15 20:54:33 C 03 12 24.29 +33 00 45.5 V 089
2021-11-15 20:57:52 C 03 12 24.34 +33 00 50.1 V 089
2021-11-16 18:16:50 C 03 13 14.98 +33 32 04.6 V G02
2021-11-16 18:20:20 C 03 13 15.09 +33 32 10.4 V G02
2021-11-16 18:23:52 C 03 13 15.18 +33 32 16.2 V G02
2021-11-16 18:32:29 C 03 13 14.54 +33 32 43.7 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)