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
2021-11-25 20:30:06 C 03 29 08.02 +41 30 20.3 V C40
2021-11-25 20:31:37 C 03 29 08.16 +41 30 25.1 V C40
2021-11-26 08:00:00 C 03 30 46.07 +42 08 17.6 V T05
2021-11-26 08:04:38 C 03 30 46.51 +42 08 33.6 V T05
2021-11-26 08:13:19 C 03 30 47.34 +42 09 03.5 V T05
2021-11-26 08:28:37 C 03 30 48.78 +42 09 55.9 V T05
2021-11-26 19:28:54 C 03 32 25.12 +42 46 18.4 V C40
2021-11-26 19:30:25 C 03 32 25.29 +42 46 23.7 V C40
2021-11-26 19:35:04 C 03 32 25.83 +42 46 40.2 V C40
2021-11-26 19:36:35 C 03 32 26.01 +42 46 45.6 V C40
2021-11-26 19:38:09 C 03 32 26.19 +42 46 51.1 V C40
2021-11-26 19:39:40 C 03 32 26.36 +42 46 56.4 V C40
2021-11-26 19:41:13 C 03 32 26.54 +42 47 02.0 V C40
2021-11-26 19:42:46 C 03 32 26.73 +42 47 07.5 V C40
2021-11-26 19:45:51 C 03 32 27.07 +42 47 18.4 V C40
2021-11-26 19:47:23 C 03 32 27.25 +42 47 23.8 V C40
2021-11-26 19:48:56 C 03 32 27.42 +42 47 29.2 V C40
2021-11-26 19:50:28 C 03 32 27.60 +42 47 34.5 V C40
2021-11-26 19:53:34 C 03 32 27.96 +42 47 45.5 V C40
2021-11-26 19:55:05 C 03 32 28.13 +42 47 50.9 V C40
2021-11-26 19:56:38 C 03 32 28.30 +42 47 56.3 V C40
2021-11-26 19:58:10 C 03 32 28.49 +42 48 01.8 V C40
2021-11-26 19:59:43 C 03 32 28.66 +42 48 07.2 V C40
2021-11-26 20:01:15 C 03 32 28.84 +42 48 12.6 V C40
2021-11-26 20:02:48 C 03 32 29.02 +42 48 18.1 V C40
2021-11-26 20:05:53 C 03 32 29.37 +42 48 28.8 V C40
2021-11-26 20:07:26 C 03 32 29.55 +42 48 34.2 V C40
2021-11-26 20:08:57 C 03 32 29.73 +42 48 39.6 V C40
2021-11-26 20:10:31 C 03 32 29.90 +42 48 45.1 V C40
2021-11-26 20:12:02 C 03 32 30.07 +42 48 50.5 V C40
2021-11-26 20:13:36 C 03 32 30.25 +42 48 55.8 V C40
2021-11-27 17:24:57 C 03 36 08.95 +44 04 51.5 V K85
2021-11-27 17:28:45 C 03 36 09.61 +44 05 06.7 V K85
2021-11-27 17:32:00 C 03 36 07.87 +44 07 07.4 V M44
2021-11-27 17:44:37 C 03 36 09.56 +44 07 58.0 V M44
2021-11-27 17:58:07 C 03 36 11.30 +44 08 51.7 V M44
2021-11-28 05:52:09 C 03 38 22.54 +44 55 12.7 V V21
2021-11-28 06:05:11 C 03 38 24.43 +44 56 05.6 V V21
2021-11-28 06:16:08 C 03 38 26.01 +44 56 49.9 V V21
2021-11-28 06:35:47 C 03 38 28.85 +44 58 08.9 V V21
2021-11-28 06:53:21 C 03 38 31.41 +44 59 19.2 V V21
2021-11-28 10:02:23 C 03 39 09.07 +45 12 37.9 V T08
2021-11-28 10:07:01 C 03 39 09.73 +45 12 56.6 V T08
2021-11-28 10:19:00 C 03 39 11.47 +45 13 44.7 V T08
2021-11-28 10:34:15 C 03 39 13.69 +45 14 45.6 V T08
2021-11-28 16:54:12 C 03 40 45.47 +45 40 34.5 V M44
2021-11-28 17:09:34 C 03 40 48.09 +45 41 42.8 V M44
2021-11-28 17:26:24 C 03 40 51.02 +45 42 59.8 V M44
2021-11-28 22:13:49 C 03 41 49.43 +46 02 24.7 V Z80
2021-11-28 22:15:05 C 03 41 49.66 +46 02 30.2 V Z80
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)