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
2022-01-22 14:47:26 C 14 45 32.80 -15 38 57.0 V T05
2022-01-22 14:52:42 C 14 45 32.97 -15 39 01.4 V T05
2022-01-22 15:04:37 C 14 45 33.37 -15 39 10.9 V T05
2022-01-22 15:22:17 C 14 45 33.95 -15 39 24.9 V T05
2022-01-24 14:19:25 C 14 47 49.44 -16 13 01.3 V T08
2022-01-24 14:24:39 C 14 47 49.65 -16 13 05.3 V T08
2022-01-24 14:35:17 C 14 47 50.00 -16 13 12.5 V T08
2022-01-24 14:51:13 C 14 47 50.54 -16 13 24.9 V T08
2022-01-27 15:09:27 C 14 51 09.49 -17 01 11.0 V T05
2022-01-27 15:15:24 C 14 51 09.68 -17 01 14.6 V T05
2022-01-27 15:43:36 C 14 51 10.52 -17 01 33.3 V T05
2022-01-27 15:56:21 C 14 51 10.94 -17 01 41.4 V T05
2022-01-29 15:12:10 C 14 53 15.22 -17 30 26.0 V T08
2022-01-29 15:40:56 C 14 53 16.04 -17 30 43.8 V T08
2022-01-29 16:04:36 C 14 53 16.75 -17 30 57.9 V T08
2022-01-29 16:07:30 C 14 53 16.84 -17 30 59.8 V T08
2022-01-30 12:20:20 C 14 54 08.13 -17 42 51.7 q V40
2022-01-30 12:28:03 C 14 54 08.30 -17 42 56.3 q V40
2022-01-30 12:35:28 C 14 54 08.51 -17 43 00.0 q V40
2022-01-30 12:39:06 C 14 54 08.65 -17 43 02.4 q V40
2022-01-31 12:03:14 C 14 55 07.13 -17 56 14.0 V 703
2022-01-31 12:11:12 C 14 55 07.33 -17 56 18.8 V 703
2022-01-31 12:19:09 C 14 55 07.60 -17 56 23.4 V 703
2022-01-31 12:27:06 C 14 55 07.81 -17 56 27.4 V 703
2022-01-31 15:18:06 C 14 55 14.96 -17 57 55.6 V T05
2022-01-31 15:43:13 C 14 55 15.63 -17 58 09.8 V T05
2022-01-31 15:57:05 C 14 55 16.01 -17 58 17.8 V T05
2022-01-31 16:06:25 C 14 55 16.27 -17 58 23.9 V T05
2022-02-05 12:44:48 C 14 59 37.02 -18 58 11.7 V 703
2022-02-05 12:52:23 C 14 59 37.18 -18 58 15.1 V 703
2022-02-05 12:59:58 C 14 59 37.37 -18 58 18.8 V 703
2022-02-05 13:07:33 C 14 59 37.51 -18 58 24.8 V 703
2022-02-06 05:41:14 C 15 00 11.58 -19 06 03.7 o Z22
2022-02-06 05:47:55 C 15 00 11.69 -19 06 06.9 o Z22
2022-02-06 23:47:14 S 15 00 44.426 -19 13 38.53 L C51
2022-02-07 02:55:22 S 15 00 50.41 -19 15 04.0 L C51
2022-02-07 06:03:30 S 15 00 56.342 -19 16 27.70 L C51
2022-02-07 09:11:38 S 15 01 02.354 -19 17 50.89 L C51
2022-02-07 13:53:07 S 15 01 10.93 -19 19 58.9 L C51
2022-02-07 15:27:44 S 15 01 13.95 -19 20 40.0 L C51
2022-02-07 15:27:55 S 15 01 13.92 -19 20 39.1 L C51
2022-02-07 17:01:59 S 15 01 16.84 -19 21 20.4 L C51
2022-02-07 20:10:07 S 15 01 22.59 -19 22 43.1 L C51
2022-02-07 23:18:04 S 15 01 28.26 -19 24 06.0 L C51
2022-02-07 23:18:16 S 15 01 28.28 -19 24 05.4 L C51
2022-02-08 02:26:13 S 15 01 33.94 -19 25 28.5 L C51
2022-02-08 02:26:24 S 15 01 33.99 -19 25 27.8 L C51
2022-02-08 05:34:21 S 15 01 39.65 -19 26 49.5 L C51
2022-02-08 15:07:20 C 15 01 58.74 -19 31 31.6 V T08
2022-02-08 15:12:40 C 15 01 58.84 -19 31 33.8 V T08
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)