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
2022-02-08 15:32:35 C 15 01 59.21 -19 31 42.4 V T08
2022-02-08 15:50:14 C 15 01 59.45 -19 31 50.4 V T08
2022-02-09 08:47:51 C 15 02 29.537 -19 38 22.74 V W68
2022-02-09 08:56:05 C 15 02 29.683 -19 38 26.20 V W68
2022-02-09 09:09:46 C 15 02 29.928 -19 38 32.35 V W68
2022-02-09 09:15:13 C 15 02 30.012 -19 38 34.51 V W68
2022-02-10 12:53:28 C 15 03 14.30 -19 50 36.0 V G96
2022-02-10 12:58:56 C 15 03 14.38 -19 50 38.0 V G96
2022-02-10 13:04:23 C 15 03 14.47 -19 50 40.3 V G96
2022-02-10 13:09:51 C 15 03 14.55 -19 50 42.5 V G96
2022-02-12 11:29:54 C 15 04 23.62 -20 08 38.7 V 703
2022-02-12 11:37:31 C 15 04 23.75 -20 08 41.9 V 703
2022-02-12 11:45:09 C 15 04 23.85 -20 08 45.2 V 703
2022-02-12 11:52:47 C 15 04 23.91 -20 08 47.8 V 703
2022-02-12 15:08:48 C 15 04 28.25 -20 09 54.7 V T08
2022-02-12 15:30:39 C 15 04 28.48 -20 10 02.8 V T08
2022-02-12 15:36:02 C 15 04 28.53 -20 10 04.9 V T08
2022-02-12 15:43:33 C 15 04 28.60 -20 10 07.8 V T08
2022-02-12 15:57:59 C 15 04 28.72 -20 10 13.3 V T08
2022-02-14 01:35:21 C 15 05 12.05 -20 22 35.1 V B18
2022-02-14 01:39:49 C 15 05 12.11 -20 22 36.9 V B18
2022-02-14 01:45:48 C 15 05 12.16 -20 22 38.9 V B18
2022-02-14 01:50:15 C 15 05 12.21 -20 22 40.5 V B18
2022-02-14 01:54:44 C 15 05 12.26 -20 22 42.1 V B18
2022-02-14 01:59:11 C 15 05 12.31 -20 22 43.9 V B18
2022-02-14 02:03:39 C 15 05 12.35 -20 22 45.5 V B18
2022-02-14 02:08:06 C 15 05 12.40 -20 22 47.0 V B18
2022-02-18 14:28:49 C 15 06 52.33 -20 57 40.6 V T05
2022-02-18 14:31:27 C 15 06 52.32 -20 57 41.9 V T05
2022-02-18 14:36:04 C 15 06 52.32 -20 57 42.9 V T05
2022-02-18 14:50:42 C 15 06 52.30 -20 57 47.7 V T05
2022-02-19 07:45:58 C 15 07 02.923 -21 02 06.18 V W68
2022-02-19 08:10:44 C 15 07 02.918 -21 02 14.24 V W68
2022-02-19 08:33:14 C 15 07 02.887 -21 02 20.94 V W68
2022-02-19 08:44:54 C 15 07 02.880 -21 02 24.32 V W68
2022-02-20 08:12:39 C 15 07 14.040 -21 08 55.07 V W68
2022-02-20 08:16:36 C 15 07 14.002 -21 08 56.22 V W68
2022-02-20 08:43:11 C 15 07 13.915 -21 09 03.92 V W68
2022-02-20 08:55:20 C 15 07 13.884 -21 09 07.24 V W68
2022-02-24 14:46:28 C 15 07 21.52 -21 34 19.1 V T08
2022-02-24 14:54:25 C 15 07 21.41 -21 34 20.6 V T08
2022-02-24 15:14:39 C 15 07 21.10 -21 34 25.1 V T08
2022-02-24 15:45:06 C 15 07 20.59 -21 34 31.5 V T08
2022-03-01 10:51:21 C 15 06 06.17 -21 54 58.0 V 703
2022-03-01 11:08:02 C 15 06 05.73 -21 55 00.8 V 703
2022-03-01 11:16:22 C 15 06 05.45 -21 55 02.1 V 703
2022-03-05 08:16:04 C 15 03 53.786 -22 04 37.92 V W68
2022-03-05 08:22:42 C 15 03 53.534 -22 04 38.53 V W68
2022-03-05 08:26:44 C 15 03 53.347 -22 04 38.60 V W68
2022-03-05 08:35:31 C 15 03 53.004 -22 04 39.72 V W68
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)