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
2022-01-07 12:24:10 C 14 26 21.53 -09 30 14.8 q V40
2022-01-07 12:27:57 C 14 26 21.69 -09 30 20.3 q V40
2022-01-07 12:39:03 C 14 26 22.13 -09 30 36.3 q V40
2022-01-07 14:37:07 C 14 26 30.97 -09 33 10.5 V T05
2022-01-07 14:42:23 C 14 26 31.20 -09 33 18.1 V T05
2022-01-07 14:50:58 C 14 26 31.54 -09 33 30.6 V T05
2022-01-07 15:09:26 C 14 26 32.31 -09 33 57.5 V T05
2022-01-08 12:00:50 C 14 27 44.34 -10 03 07.1 q V40
2022-01-08 12:11:57 C 14 27 44.77 -10 03 22.3 q V40
2022-01-08 12:38:05 C 14 27 45.80 -10 03 58.8 q V40
2022-01-08 12:49:26 C 14 27 46.24 -10 04 14.0 q V40
2022-01-09 14:36:49 C 14 29 16.42 -10 37 49.1 V T08
2022-01-09 14:42:47 C 14 29 16.69 -10 37 57.0 V T08
2022-01-09 14:51:26 C 14 29 17.03 -10 38 08.7 V T08
2022-01-09 15:07:21 C 14 29 17.64 -10 38 29.5 V T08
2022-01-13 12:06:58 C 14 34 22.91 -12 26 22.5 q V40
2022-01-13 12:14:44 C 14 34 23.19 -12 26 31.0 q V40
2022-01-13 12:22:06 C 14 34 23.43 -12 26 38.3 q V40
2022-01-13 12:29:38 C 14 34 23.73 -12 26 46.3 q V40
2022-01-13 15:22:33 C 14 34 33.71 -12 29 37.0 V T08
2022-01-13 15:32:30 C 14 34 34.09 -12 29 47.5 V T08
2022-01-13 15:54:58 C 14 34 34.85 -12 30 12.0 V T08
2022-01-13 16:04:16 C 14 34 35.23 -12 30 21.7 V T08
2022-01-17 14:09:45 C 14 39 32.08 -14 01 02.0 V T08
2022-01-17 14:18:25 C 14 39 32.41 -14 01 09.7 V T08
2022-01-17 14:35:42 C 14 39 33.07 -14 01 25.9 V T08
2022-01-18 12:16:11 C 14 40 38.17 -14 20 33.1 q V40
2022-01-18 12:23:51 C 14 40 38.51 -14 20 39.9 q V40
2022-01-18 12:35:02 C 14 40 38.91 -14 20 48.7 q V40
2022-01-20 04:35:34 C 14 42 40.04 -14 54 14.8 X C95
2022-01-20 04:39:15 C 14 42 40.19 -14 54 17.9 X C95
2022-01-20 04:42:53 C 14 42 40.36 -14 54 21.5 X C95
2022-01-20 15:07:59 C 14 43 12.11 -15 02 22.6 V T08
2022-01-20 15:12:37 C 14 43 12.36 -15 02 27.2 V T08
2022-01-20 15:39:51 C 14 43 13.23 -15 02 49.7 V T08
2022-01-20 15:53:46 C 14 43 13.69 -15 02 59.8 V T08
2022-01-21 12:03:29 C 14 44 14.09 -15 18 53.7 V 703
2022-01-21 12:10:51 C 14 44 14.27 -15 19 01.4 V 703
2022-01-21 12:18:14 C 14 44 14.58 -15 19 06.6 V 703
2022-01-21 12:25:36 C 14 44 14.82 -15 19 13.0 V 703
2022-01-21 14:56:30 C 14 44 22.81 -15 20 56.4 V T08
2022-01-21 15:01:08 C 14 44 23.00 -15 21 00.8 V T08
2022-01-21 15:32:26 C 14 44 24.07 -15 21 26.4 V T08
2022-01-21 15:36:29 C 14 44 24.21 -15 21 29.8 V T08
2022-01-21 15:53:30 C 14 44 24.77 -15 21 42.6 V T08
2022-01-21 16:06:46 C 14 44 25.13 -15 21 53.4 V T08
2022-01-22 11:53:45 C 14 45 23.78 -15 36 57.0 q V40
2022-01-22 12:01:24 C 14 45 24.03 -15 37 02.9 q V40
2022-01-22 12:08:53 C 14 45 24.26 -15 37 08.5 q V40
2022-01-22 12:22:39 C 14 45 24.72 -15 37 18.8 q V40
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)