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
2021-11-13 12:58:53 C 03 10 42.06 +31 46 00.8 V D29
2021-11-13 13:19:15 C 03 10 42.29 +31 46 28.1 V D29
2021-11-13 19:41:13 C 03 10 51.54 +31 54 18.4 V C40
2021-11-13 19:42:48 C 03 10 51.57 +31 54 20.5 V C40
2021-11-13 19:44:22 C 03 10 51.58 +31 54 22.6 V C40
2021-11-13 19:45:55 C 03 10 51.60 +31 54 24.7 V C40
2021-11-13 19:47:30 C 03 10 51.61 +31 54 26.8 V C40
2021-11-13 19:49:04 C 03 10 51.63 +31 54 28.8 V C40
2021-11-13 19:50:38 C 03 10 51.65 +31 54 30.8 V C40
2021-11-13 19:52:13 C 03 10 51.67 +31 54 32.9 V C40
2021-11-13 19:53:47 C 03 10 51.69 +31 54 34.9 V C40
2021-11-13 19:55:22 C 03 10 51.70 +31 54 37.0 V C40
2021-11-13 19:56:55 C 03 10 51.72 +31 54 39.0 V C40
2021-11-13 19:58:29 C 03 10 51.74 +31 54 41.1 V C40
2021-11-13 20:00:04 C 03 10 51.76 +31 54 43.2 V C40
2021-11-13 20:01:39 C 03 10 51.77 +31 54 45.1 V C40
2021-11-13 20:03:13 C 03 10 51.79 +31 54 47.2 V C40
2021-11-13 20:04:47 C 03 10 51.80 +31 54 49.3 V C40
2021-11-13 20:06:21 C 03 10 51.82 +31 54 51.3 V C40
2021-11-13 20:07:55 C 03 10 51.84 +31 54 53.3 V C40
2021-11-13 20:09:29 C 03 10 51.86 +31 54 55.4 V C40
2021-11-13 20:11:04 C 03 10 51.88 +31 54 57.5 V C40
2021-11-13 20:12:39 C 03 10 51.89 +31 54 59.4 V C40
2021-11-13 20:14:13 C 03 10 51.91 +31 55 01.5 V C40
2021-11-13 20:15:46 C 03 10 51.92 +31 55 03.7 V C40
2021-11-13 20:17:20 C 03 10 51.94 +31 55 05.6 V C40
2021-11-13 20:18:55 C 03 10 51.96 +31 55 07.6 V C40
2021-11-13 20:20:30 C 03 10 51.98 +31 55 09.6 V C40
2021-11-13 20:22:04 C 03 10 51.99 +31 55 11.7 V C40
2021-11-13 20:23:38 C 03 10 52.01 +31 55 13.7 V C40
2021-11-13 20:25:12 C 03 10 52.02 +31 55 15.8 V C40
2021-11-13 20:26:46 C 03 10 52.05 +31 55 17.8 V C40
2021-11-14 00:58:33 C 03 10 55.98 +32 00 52.3 V 089
2021-11-14 01:01:52 C 03 10 56.11 +32 00 56.9 V 089
2021-11-14 01:10:10 C 03 10 56.21 +32 01 06.6 V 089
2021-11-14 01:13:29 C 03 10 56.29 +32 01 10.1 V 089
2021-11-14 01:22:29 C 03 10 56.48 +32 01 21.4 V 089
2021-11-14 01:26:47 C 03 10 56.53 +32 01 26.2 V 089
2021-11-14 01:34:25 C 03 10 56.75 +32 01 35.0 V 089
2021-11-14 01:37:43 C 03 10 56.79 +32 01 38.9 V 089
2021-11-14 01:46:24 C 03 10 56.94 +32 01 49.7 V 089
2021-11-14 01:49:42 C 03 10 57.02 +32 01 52.5 V 089
2021-11-14 02:31:38 C 03 11 06.45 +32 03 07.3 q V40
2021-11-14 02:38:00 C 03 11 06.57 +32 03 15.9 q V40
2021-11-14 02:50:02 C 03 11 06.78 +32 03 32.9 q V40
2021-11-14 02:59:29 C 03 11 06.94 +32 03 46.4 q V40
2021-11-14 03:05:43 C 03 11 07.04 +32 03 55.3 q V40
2021-11-14 19:27:58 C 03 11 34.51 +32 25 23.2 V C40
2021-11-14 19:29:32 C 03 11 34.55 +32 25 25.2 V C40
2021-11-14 19:31:05 C 03 11 34.57 +32 25 27.4 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)