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
2021-11-21 19:37:14 C 03 19 41.66 +37 14 36.2 V C40
2021-11-21 19:38:47 C 03 19 41.73 +37 14 39.7 V C40
2021-11-21 19:40:20 C 03 19 41.80 +37 14 43.2 V C40
2021-11-21 19:41:51 C 03 19 41.87 +37 14 46.7 V C40
2021-11-21 19:43:25 C 03 19 41.95 +37 14 50.2 V C40
2021-11-21 19:44:56 C 03 19 42.01 +37 14 53.6 V C40
2021-11-21 19:46:30 C 03 19 42.08 +37 14 57.0 V C40
2021-11-21 19:48:01 C 03 19 42.15 +37 15 00.5 V C40
2021-11-21 19:49:35 C 03 19 42.22 +37 15 04.0 V C40
2021-11-21 19:51:06 C 03 19 42.29 +37 15 07.6 V C40
2021-11-21 19:52:39 C 03 19 42.35 +37 15 10.9 V C40
2021-11-21 19:54:12 C 03 19 42.43 +37 15 14.5 V C40
2021-11-21 19:55:43 C 03 19 42.50 +37 15 17.9 V C40
2021-11-21 19:57:17 C 03 19 42.58 +37 15 21.3 V C40
2021-11-21 19:58:48 C 03 19 42.64 +37 15 24.8 V C40
2021-11-21 20:00:22 C 03 19 42.71 +37 15 28.2 V C40
2021-11-21 20:01:53 C 03 19 42.78 +37 15 31.8 V C40
2021-11-22 05:23:14 C 03 20 26.85 +37 36 47.4 Z U76
2021-11-22 05:46:33 C 03 20 27.92 +37 37 43.0 Z U76
2021-11-22 06:12:02 C 03 20 29.07 +37 38 42.9 Z U76
2021-11-22 07:56:57 C 03 20 33.55 +37 42 45.1 U I41
2021-11-22 08:15:20 C 03 20 34.39 +37 43 26.2 U I41
2021-11-22 09:10:20 C 03 20 36.98 +37 45 27.4 U I41
2021-11-22 09:38:52 C 03 20 38.41 +37 46 29.4 U I41
2021-11-22 11:19:20 C 03 20 47.54 +37 50 53.3 V T05
2021-11-22 11:24:04 C 03 20 47.74 +37 51 03.7 V T05
2021-11-22 11:37:23 C 03 20 48.35 +37 51 33.2 V T05
2021-11-22 11:41:21 C 03 20 48.54 +37 51 41.8 V T05
2021-11-22 11:51:27 C 03 20 49.01 +37 52 03.9 V T05
2021-11-22 11:54:48 C 03 20 49.18 +37 52 11.1 V T05
2021-11-22 12:11:20 C 03 20 49.97 +37 52 47.1 V T05
2021-11-22 16:18:27 C 03 21 21.72 +38 02 14.1 V M44
2021-11-22 16:35:11 C 03 21 22.65 +38 02 57.1 V M44
2021-11-22 16:52:24 C 03 21 23.57 +38 03 41.3 V M44
2021-11-22 17:56:29 C 03 21 27.55 +38 05 36.7 V C40
2021-11-22 17:56:38 C 03 21 28.83 +38 05 06.8 V G33
2021-11-22 17:58:21 C 03 21 28.96 +38 05 11.2 V G33
2021-11-22 17:59:34 C 03 21 27.73 +38 05 44.5 V C40
2021-11-22 18:00:00 C 03 21 29.08 +38 05 15.4 V G33
2021-11-22 18:01:07 C 03 21 27.83 +38 05 48.3 V C40
2021-11-22 18:01:41 C 03 21 29.21 +38 05 19.7 V G33
2021-11-22 18:02:38 C 03 21 27.93 +38 05 52.3 V C40
2021-11-22 18:03:22 C 03 21 29.33 +38 05 24.0 V G33
2021-11-22 18:04:12 C 03 21 28.01 +38 05 56.1 V C40
2021-11-22 18:05:03 C 03 21 29.46 +38 05 28.3 V G33
2021-11-22 18:05:17 C 03 21 29.63 +38 05 28.9 V K85
2021-11-22 18:05:43 C 03 21 28.09 +38 06 00.0 V C40
2021-11-22 18:07:16 C 03 21 28.18 +38 06 04.0 V C40
2021-11-22 19:21:33 C 03 21 34.99 +38 08 43.8 V K85
2021-11-22 20:05:54 C 03 21 34.84 +38 10 57.4 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)