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
2022-03-07 06:59:01 C 15 02 23.746 -22 07 31.08 V W68
2022-03-07 07:02:54 C 15 02 23.573 -22 07 31.12 V W68
2022-03-07 07:34:06 C 15 02 22.169 -22 07 33.28 V W68
2022-03-07 07:43:50 C 15 02 21.749 -22 07 33.89 V W68
2022-03-07 11:20:37 C 15 02 13.46 -22 08 18.3 V 703
2022-03-07 11:28:18 C 15 02 13.07 -22 08 18.9 V 703
2022-03-07 11:35:58 C 15 02 12.76 -22 08 18.5 V 703
2022-03-07 11:43:39 C 15 02 12.39 -22 08 18.9 V 703
2022-03-10 09:58:23 C 14 59 23.59 -22 09 31.0 V G96
2022-03-10 10:07:59 C 14 59 23.09 -22 09 31.0 V G96
2022-03-10 10:17:31 C 14 59 22.57 -22 09 31.0 V G96
2022-03-10 10:27:04 C 14 59 22.06 -22 09 30.9 V G96
2022-03-10 11:34:32 C 14 59 18.34 -22 09 29.7 V 703
2022-03-10 11:42:08 C 14 59 17.84 -22 09 29.7 V 703
2022-03-10 11:49:44 C 14 59 17.52 -22 09 29.8 V 703
2022-03-10 11:57:20 C 14 59 17.21 -22 09 29.8 V 703
2022-03-15 07:00:36 C 14 53 20.784 -22 02 49.42 V W68
2022-03-15 07:05:32 C 14 53 20.450 -22 02 49.02 V W68
2022-03-15 07:21:31 C 14 53 19.378 -22 02 47.54 V W68
2022-03-15 07:30:29 C 14 53 18.754 -22 02 46.72 V W68
2022-03-16 08:11:29 C 14 51 49.481 -22 00 08.17 V W68
2022-03-16 08:17:14 C 14 51 49.070 -22 00 07.20 V W68
2022-03-16 09:07:39 C 14 51 45.521 -22 00 01.40 V W68
2022-03-16 09:40:24 C 14 51 43.212 -21 59 56.90 V W68
2022-03-24 07:44:34 C 14 38 11.870 -21 23 05.35 V W68
2022-03-24 07:48:29 C 14 38 11.542 -21 23 04.02 V W68
2022-03-24 08:11:32 C 14 38 09.485 -21 22 57.86 V W68
2022-03-24 08:43:07 C 14 38 06.689 -21 22 48.76 V W68
2022-03-25 07:23:13 C 14 36 17.429 -21 16 28.16 V W68
2022-03-25 07:27:26 C 14 36 17.047 -21 16 26.76 V W68
2022-03-25 08:12:30 C 14 36 12.967 -21 16 13.55 V W68
2022-03-25 08:27:49 C 14 36 11.585 -21 16 08.94 V W68
2022-03-28 06:01:06 C 14 30 21.984 -20 54 05.00 V W68
2022-03-28 06:39:16 C 14 30 18.370 -20 53 51.76 V W68
2022-03-28 06:44:47 C 14 30 17.839 -20 53 49.81 V W68
2022-03-28 06:50:24 C 14 30 17.311 -20 53 47.80 V W68
2022-03-28 07:47:05 C 14 30 13.27 -20 53 58.5 V 703
2022-03-28 07:53:29 C 14 30 12.61 -20 53 56.5 V 703
2022-03-28 07:59:53 C 14 30 12.07 -20 53 55.0 V 703
2022-03-28 08:06:18 C 14 30 11.49 -20 53 51.7 V 703
2022-03-31 05:13:00 C 14 24 07.471 -20 27 44.82 V W68
2022-03-31 05:50:19 C 14 24 03.857 -20 27 30.56 V W68
2022-03-31 05:57:32 C 14 24 03.139 -20 27 27.90 V W68
2022-03-31 06:04:49 C 14 24 02.426 -20 27 24.91 V W68
2022-04-01 06:29:45 C 14 21 51.211 -20 17 34.84 V W68
2022-04-01 06:36:13 C 14 21 50.580 -20 17 32.10 V W68
2022-04-01 07:28:41 C 14 21 45.442 -20 17 10.21 V W68
2022-04-01 08:00:09 C 14 21 42.358 -20 16 56.89 V W68
2022-04-03 06:32:23 C 14 17 31.40 -19 57 13.7 V W94
2022-04-03 06:40:36 C 14 17 30.62 -19 57 09.9 V W94
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)