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
2022-04-20 06:50:54 C 13 43 47.438 -16 35 50.10 V 703
2022-04-20 06:59:05 C 13 43 46.798 -16 35 46.28 V 703
2022-04-20 07:07:17 C 13 43 46.196 -16 35 42.07 V 703
2022-04-20 07:12:44 C 13 43 44.837 -16 35 13.31 V W68
2022-04-20 07:15:30 C 13 43 45.588 -16 35 38.15 V 703
2022-04-20 07:18:10 C 13 43 44.424 -16 35 10.46 V W68
2022-04-20 07:28:15 C 13 43 43.687 -16 35 05.46 V W68
2022-04-20 07:45:31 C 13 43 42.415 -16 34 56.42 V W68
2022-04-21 06:05:41 C 13 42 12.866 -16 23 59.24 V W68
2022-04-21 06:10:24 C 13 42 12.530 -16 23 56.80 V W68
2022-04-21 06:19:25 C 13 42 11.878 -16 23 52.44 V W68
2022-04-21 06:33:50 C 13 42 10.846 -16 23 45.10 V W68
2022-04-21 17:48:40 C 13 41 27.372 -16 18 44.29 W N86
2022-04-21 17:59:20 C 13 41 26.565 -16 18 39.23 W N86
2022-04-21 18:10:06 C 13 41 25.846 -16 18 33.24 W N86
2022-04-21 18:20:48 C 13 41 25.094 -16 18 27.89 W N86
2022-04-21 23:40:55 C 13 41 04.406 -16 15 54.40 V A16
2022-04-22 00:04:20 C 13 41 02.784 -16 15 42.84 V A16
2022-04-22 00:27:45 C 13 41 01.150 -16 15 31.43 V A16
2022-04-23 03:47:08 C 13 39 18.33 -16 02 01.8 V W94
2022-04-23 03:55:23 C 13 39 17.75 -16 01 57.9 V W94
2022-04-23 04:03:39 C 13 39 17.18 -16 01 54.0 V W94
2022-04-24 04:55:12 C 13 37 46.783 -15 50 09.38 V W68
2022-04-24 05:01:39 C 13 37 46.330 -15 50 06.25 V W68
2022-04-24 05:10:29 C 13 37 45.763 -15 50 02.15 V W68
2022-04-24 05:25:08 C 13 37 44.810 -15 49 55.16 V W68
2022-04-24 08:45:45 C 13 37 32.772 -15 48 45.04 V 703
2022-04-24 08:53:24 C 13 37 32.264 -15 48 41.47 V 703
2022-04-24 09:01:03 C 13 37 31.771 -15 48 37.80 V 703
2022-04-24 09:08:43 C 13 37 31.292 -15 48 33.95 V 703
2022-04-25 05:52:56 C 13 36 20.614 -15 39 01.91 V G96
2022-04-25 06:00:22 C 13 36 20.149 -15 38 58.42 V G96
2022-04-25 06:07:51 C 13 36 19.685 -15 38 55.07 V G96
2022-04-25 06:15:17 C 13 36 19.220 -15 38 51.65 V G96
2022-04-28 05:18:01 C 13 32 33.156 -15 07 08.98 V W68
2022-04-28 05:22:15 C 13 32 32.930 -15 07 07.03 V W68
2022-04-28 05:30:55 C 13 32 32.450 -15 07 03.50 V W68
2022-04-28 05:46:44 C 13 32 31.589 -15 06 56.92 V W68
2022-04-28 06:51:56 C 13 32 28.907 -15 06 51.66 V 703
2022-04-28 07:00:01 C 13 32 28.496 -15 06 47.81 V 703
2022-04-28 07:08:06 C 13 32 28.032 -15 06 44.68 V 703
2022-04-28 07:16:11 C 13 32 27.586 -15 06 41.08 V 703
2022-05-03 04:46:21 C 13 27 26.774 -14 20 03.48 V W68
2022-05-03 04:52:02 C 13 27 26.549 -14 20 01.25 V W68
2022-05-03 05:00:22 C 13 27 26.196 -14 19 58.40 V W68
2022-05-03 05:18:09 C 13 27 25.464 -14 19 51.85 V W68
2022-05-03 12:42:47 C 13 27 10.829 -14 17 14.17 V P07
2022-05-03 13:48:47 C 13 27 08.146 -14 16 51.49 V P07
2022-05-03 13:51:06 C 13 27 08.054 -14 16 50.70 V P07
2022-05-03 15:32:43 C 13 27 03.900 -14 16 14.52 V P07
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)