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
2021-12-02 20:17:57 C 04 15 10.20 +54 28 39.8 V C40
2021-12-02 20:19:08 C 04 15 10.78 +54 28 47.8 V C40
2021-12-02 20:20:22 C 04 15 11.36 +54 28 55.9 V C40
2021-12-02 20:21:31 C 04 15 11.93 +54 29 03.6 V C40
2021-12-02 20:22:43 C 04 15 12.51 +54 29 11.6 V C40
2021-12-02 20:23:55 C 04 15 13.09 +54 29 19.7 V C40
2021-12-02 20:25:09 C 04 15 13.68 +54 29 27.7 V C40
2021-12-02 20:26:20 C 04 15 14.26 +54 29 35.8 V C40
2021-12-02 20:27:34 C 04 15 14.83 +54 29 43.8 V C40
2021-12-02 20:28:45 C 04 15 15.40 +54 29 51.8 V C40
2021-12-02 20:29:59 C 04 15 15.99 +54 29 59.9 V C40
2021-12-02 20:31:11 C 04 15 16.58 +54 30 07.8 V C40
2021-12-02 20:32:23 C 04 15 17.16 +54 30 15.8 V C40
2021-12-02 20:33:36 C 04 15 17.74 +54 30 23.8 V C40
2021-12-02 20:34:47 C 04 15 18.32 +54 30 31.9 V C40
2021-12-02 20:36:00 C 04 15 18.90 +54 30 39.9 V C40
2021-12-02 20:37:13 C 04 15 19.47 +54 30 48.0 V C40
2021-12-02 20:38:23 V 04 15 29.64 +54 30 11.4 13.4 V 270
2021-12-02 20:38:23 v 1 359.62672 +49.20389 270
2021-12-02 20:38:25 C 04 15 20.06 +54 30 55.9 V C40
2021-12-02 20:39:38 C 04 15 20.64 +54 31 03.9 V C40
2021-12-02 20:40:50 C 04 15 21.22 +54 31 11.9 V C40
2021-12-02 21:08:39 V 04 15 44.93 +54 33 40.6 13.4 V 270
2021-12-02 21:08:39 v 1 359.62672 +49.20389 270
2021-12-02 21:29:33 C 04 15 48.60 +54 36 36.0 V 073
2021-12-02 21:35:26 V 04 15 58.41 +54 36 44.3 13.3 V 270
2021-12-02 21:35:26 v 1 359.62672 +49.20389 270
2021-12-02 21:36:40 C 04 15 52.06 +54 37 23.3 V 073
2021-12-02 21:43:47 C 04 15 55.52 +54 38 10.5 V 073
2021-12-02 21:50:54 C 04 15 58.98 +54 38 57.5 V 073
2021-12-02 21:54:29 V 04 16 07.88 +54 38 54.8 13.2 V 270
2021-12-02 21:54:29 v 1 359.62672 +49.20389 270
2021-12-02 21:58:01 C 04 16 02.45 +54 39 44.5 V 073
2021-12-02 22:05:07 C 04 16 05.93 +54 40 31.5 V 073
2021-12-02 22:11:58 C 04 16 09.27 +54 41 16.5 V 073
2021-12-02 22:18:32 C 04 16 12.50 +54 41 59.6 V 073
2021-12-02 22:25:06 C 04 16 15.72 +54 42 42.7 V 073
2021-12-03 03:07:51 C 04 19 19.49 +55 14 19.2 q V40
2021-12-03 03:10:21 C 04 19 20.64 +55 14 34.6 q V40
2021-12-03 03:12:44 C 04 19 21.93 +55 14 52.1 q V40
2021-12-03 03:17:41 C 04 19 24.60 +55 15 28.2 q V40
2021-12-03 17:09:50 C 04 28 26.85 +56 51 01.4 V C40
2021-12-03 17:11:03 C 04 28 27.67 +56 51 10.5 V C40
2021-12-03 17:12:15 C 04 28 28.47 +56 51 19.8 V C40
2021-12-03 17:13:28 C 04 28 29.27 +56 51 29.0 V C40
2021-12-03 17:14:40 C 04 28 30.08 +56 51 38.2 V C40
2021-12-03 17:15:52 C 04 28 30.88 +56 51 47.3 V C40
2021-12-03 17:17:06 C 04 28 31.69 +56 51 56.7 V C40
2021-12-03 17:18:17 C 04 28 32.49 +56 52 05.8 V C40
2021-12-03 17:19:31 C 04 28 33.29 +56 52 15.0 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)