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
2022-04-03 06:48:52 C 14 17 29.82 -19 57 06.1 V W94
2022-04-03 10:12:20 C 14 17 11.173 -19 56 02.44 V 703
2022-04-03 10:25:11 C 14 17 09.920 -19 55 56.68 V 703
2022-04-03 10:31:37 C 14 17 09.294 -19 55 53.44 V 703
2022-04-04 06:25:27 C 14 15 22.152 -19 46 31.94 V W68
2022-04-04 06:30:30 C 14 15 21.658 -19 46 29.39 V W68
2022-04-04 06:38:16 C 14 15 20.887 -19 46 25.93 V W68
2022-04-04 07:23:08 C 14 15 16.483 -19 46 05.45 V W68
2022-04-05 04:39:49 C 14 13 22.606 -19 36 21.92 V W68
2022-04-05 04:41:47 C 14 13 22.421 -19 36 21.02 V W68
2022-04-05 05:24:28 C 14 13 18.250 -19 36 01.91 V W68
2022-04-05 05:54:35 C 14 13 15.274 -19 35 48.16 V W68
2022-04-05 09:38:03 C 14 12 54.655 -19 34 33.49 V G96
2022-04-05 09:45:27 C 14 12 53.932 -19 34 29.93 V G96
2022-04-05 09:52:49 C 14 12 53.219 -19 34 26.54 V G96
2022-04-05 10:00:11 C 14 12 52.492 -19 34 23.05 V G96
2022-04-05 23:05:46 C 14 11 43.01 -19 27 50.8 V 221
2022-04-05 23:14:58 C 14 11 42.11 -19 27 46.5 V 221
2022-04-05 23:24:00 C 14 11 41.22 -19 27 42.4 V 221
2022-04-06 09:13:32 C 14 10 47.669 -19 23 29.33 V 703
2022-04-06 09:21:11 C 14 10 46.924 -19 23 25.48 V 703
2022-04-06 09:28:50 C 14 10 46.168 -19 23 21.98 V 703
2022-04-06 09:36:27 C 14 10 45.433 -19 23 18.17 V 703
2022-04-08 04:30:10 C 14 06 57.329 -19 02 08.34 V W68
2022-04-08 04:32:36 C 14 06 57.101 -19 02 07.15 V W68
2022-04-08 05:16:03 C 14 06 52.915 -19 01 46.27 V W68
2022-04-08 05:20:28 C 14 06 52.505 -19 01 44.08 V W68
2022-04-09 05:37:22 C 14 04 44.282 -18 49 45.62 V W68
2022-04-09 05:43:26 C 14 04 43.697 -18 49 42.67 V W68
2022-04-09 06:01:05 C 14 04 42.029 -18 49 33.89 V W68
2022-04-09 06:14:04 C 14 04 40.793 -18 49 27.52 V W68
2022-04-09 09:16:47 C 14 04 24.568 -18 48 24.48 V 703
2022-04-09 09:24:23 C 14 04 23.934 -18 48 21.35 V 703
2022-04-09 09:31:59 C 14 04 23.225 -18 48 17.75 V 703
2022-04-09 17:18:21 C 14 03 43.183 -18 44 00.82 V P07
2022-04-09 18:11:43 C 14 03 38.090 -18 43 33.89 V P07
2022-04-09 18:15:26 C 14 03 37.752 -18 43 32.12 V P07
2022-04-09 19:44:01 C 14 03 29.386 -18 42 46.26 V P07
2022-04-10 13:57:30 C 14 01 55.75 -18 33 30.9 q E89
2022-04-10 14:12:59 C 14 01 54.31 -18 33 23.1 q E89
2022-04-12 07:12:19 C 13 58 26.598 -18 13 06.49 V 703
2022-04-12 07:20:18 C 13 58 25.860 -18 13 02.28 V 703
2022-04-12 07:28:17 C 13 58 25.158 -18 12 58.36 V 703
2022-04-12 07:36:16 C 13 58 24.438 -18 12 54.14 V 703
2022-04-20 01:03:44 C 13 44 10.776 -16 38 46.97 V A16
2022-04-20 01:19:28 C 13 44 09.444 -16 38 37.14 V A16
2022-04-20 01:42:48 C 13 44 07.730 -16 38 25.33 V A16
2022-04-20 02:29:36 C 13 44 06.13 -16 37 59.4 V W46
2022-04-20 02:44:51 C 13 44 05.04 -16 37 51.8 V W46
2022-04-20 02:58:37 C 13 44 04.01 -16 37 45.3 V W46
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)