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
2021-11-28 22:16:15 C 03 41 49.89 +46 02 35.7 V Z80
2021-11-29 05:35:50 C 03 43 32.09 +46 35 37.8 V V21
2021-11-29 05:48:13 C 03 43 34.33 +46 36 33.8 V V21
2021-11-29 06:00:37 C 03 43 36.57 +46 37 30.2 V V21
2021-11-29 06:25:24 C 03 43 41.07 +46 39 21.7 V V21
2021-12-01 20:10:37 n 04 03 36.01 +51 56 49.5 q Z92
2021-12-01 20:25:37 n 04 03 41.87 +51 58 22.6 q Z92
2021-12-01 20:49:36 n 04 03 51.16 +52 00 51.3 q Z92
2021-12-02 03:14:06 C 04 06 46.70 +52 40 26.7 q V40
2021-12-02 03:23:57 C 04 06 50.59 +52 41 31.0 q V40
2021-12-02 03:37:14 C 04 06 55.93 +52 42 57.4 q V40
2021-12-02 04:37:22 C 04 07 19.78 +52 49 27.6 q V40
2021-12-02 04:41:12 C 04 07 21.17 +52 49 49.9 q V40
2021-12-02 04:44:45 C 04 07 22.51 +52 50 12.9 q V40
2021-12-02 04:51:23 C 04 07 25.13 +52 50 55.1 q V40
2021-12-02 10:31:44 C 04 09 57.26 +53 26 59.5 V T08
2021-12-02 10:36:23 C 04 09 59.16 +53 27 28.2 V T08
2021-12-02 10:44:20 C 04 10 02.38 +53 28 17.4 V T08
2021-12-02 10:59:37 C 04 10 08.58 +53 29 51.1 V T08
2021-12-02 17:40:38 C 04 13 54.41 +54 10 52.3 V C40
2021-12-02 17:41:51 C 04 13 54.99 +54 11 00.6 V C40
2021-12-02 17:43:03 C 04 13 55.58 +54 11 09.1 V C40
2021-12-02 17:44:15 C 04 13 56.17 +54 11 17.3 V C40
2021-12-02 17:45:29 C 04 13 56.76 +54 11 25.6 V C40
2021-12-02 17:46:40 C 04 13 57.35 +54 11 34.0 V C40
2021-12-02 17:47:54 C 04 13 57.95 +54 11 42.3 V C40
2021-12-02 17:49:05 C 04 13 58.53 +54 11 50.7 V C40
2021-12-02 17:50:19 C 04 13 59.12 +54 11 58.9 V C40
2021-12-02 17:51:31 C 04 13 59.71 +54 12 07.2 V C40
2021-12-02 17:52:43 C 04 14 00.30 +54 12 15.6 V C40
2021-12-02 17:53:56 C 04 14 00.88 +54 12 23.9 V C40
2021-12-02 17:55:08 C 04 14 01.47 +54 12 32.1 V C40
2021-12-02 17:56:21 C 04 14 02.07 +54 12 40.5 V C40
2021-12-02 17:57:33 C 04 14 02.65 +54 12 48.8 V C40
2021-12-02 17:58:45 C 04 14 03.24 +54 12 57.2 V C40
2021-12-02 17:59:59 C 04 14 03.82 +54 13 05.4 V C40
2021-12-02 18:01:10 C 04 14 04.41 +54 13 13.7 V C40
2021-12-02 18:02:24 C 04 14 05.01 +54 13 21.9 V C40
2021-12-02 18:03:35 C 04 14 05.58 +54 13 30.3 V C40
2021-12-02 18:04:48 C 04 14 06.17 +54 13 38.6 V C40
2021-12-02 18:06:01 C 04 14 06.76 +54 13 46.9 V C40
2021-12-02 18:07:12 C 04 14 07.34 +54 13 55.1 V C40
2021-12-02 18:08:26 C 04 14 07.94 +54 14 03.4 V C40
2021-12-02 18:09:38 C 04 14 08.52 +54 14 11.6 V C40
2021-12-02 18:10:50 C 04 14 09.10 +54 14 19.9 V C40
2021-12-02 18:13:15 C 04 14 10.27 +54 14 36.5 V C40
2021-12-02 18:14:28 C 04 14 10.86 +54 14 44.8 V C40
2021-12-02 18:15:40 C 04 14 11.44 +54 14 52.9 V C40
2021-12-02 20:15:31 C 04 15 09.05 +54 28 23.7 V C40
2021-12-02 20:16:43 C 04 15 09.63 +54 28 31.7 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)