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
2021-12-14 11:55:06 C 12 50 18.65 +41 05 26.8 q V40
2021-12-14 15:10:20 C 12 52 38.10 +40 15 41.5 V T08
2021-12-14 15:15:42 C 12 52 41.32 +40 14 21.1 V T08
2021-12-14 15:26:33 C 12 52 47.81 +40 11 38.7 V T08
2021-12-14 15:50:26 C 12 53 01.93 +40 05 39.9 V T08
2021-12-14 16:38:54 S 12 53 17.772 +39 52 24.82 L C51
2021-12-14 18:13:09 S 12 54 21.187 +39 28 23.16 L C51
2021-12-15 18:23:32 C 13 08 45.25 +33 34 37.2 q Q21
2021-12-15 18:24:53 C 13 08 45.88 +33 34 19.3 q Q21
2021-12-15 18:26:15 C 13 08 46.54 +33 34 00.8 q Q21
2021-12-15 18:27:37 C 13 08 47.17 +33 33 42.9 q Q21
2021-12-15 18:29:38 C 13 08 48.10 +33 33 15.7 q Q21
2021-12-17 12:38:58 C 13 26 12.45 +24 49 14.5 V G96
2021-12-17 12:52:13 C 13 26 16.19 +24 46 50.5 V G96
2021-12-17 13:01:07 C 13 26 18.68 +24 45 13.6 V G96
2021-12-17 13:10:05 C 13 26 21.18 +24 43 35.9 V G96
2021-12-17 13:57:07 C 13 26 44.92 +24 35 11.7 V T08
2021-12-17 14:01:46 C 13 26 46.31 +24 34 22.3 V T08
2021-12-17 14:10:25 C 13 26 48.85 +24 32 50.4 V T08
2021-12-17 14:31:40 C 13 26 55.04 +24 29 04.3 V T08
2021-12-21 05:39:40 C 13 48 02.42 +11 51 19.7 X K87
2021-12-21 05:41:13 C 13 48 02.64 +11 51 09.4 X K87
2021-12-21 05:42:45 C 13 48 02.87 +11 50 59.3 X K87
2021-12-21 12:03:42 C 13 49 14.52 +11 09 44.4 q V40
2021-12-21 12:06:59 C 13 49 14.95 +11 09 25.3 q V40
2021-12-21 12:12:57 C 13 49 15.64 +11 08 47.8 q V40
2021-12-21 12:21:36 C 13 49 16.86 +11 07 52.5 q V40
2021-12-27 10:45:20 C 14 07 16.63 +00 04 26.7 q V40
2021-12-27 11:01:52 C 14 07 17.86 +00 03 33.1 q V40
2021-12-27 11:14:36 C 14 07 18.84 +00 02 50.8 q V40
2021-12-27 11:21:27 C 14 07 19.33 +00 02 27.9 q V40
2021-12-30 11:48:15 C 14 13 31.79 -03 26 25.7 q V40
2021-12-30 12:01:34 C 14 13 32.56 -03 26 59.4 q V40
2021-12-30 12:14:23 C 14 13 33.25 -03 27 31.9 q V40
2022-01-01 14:54:15 C 14 17 20.52 -05 24 03.7 V T08
2022-01-01 14:58:53 C 14 17 20.76 -05 24 13.6 V T08
2022-01-01 15:07:31 C 14 17 21.17 -05 24 32.1 V T08
2022-01-01 15:34:43 C 14 17 22.47 -05 25 30.4 V T08
2022-01-05 12:09:12 C 14 23 28.06 -08 16 52.7 V 703
2022-01-05 12:16:47 C 14 23 28.39 -08 17 05.2 V 703
2022-01-05 12:24:23 C 14 23 28.72 -08 17 17.5 V 703
2022-01-05 12:31:58 C 14 23 29.00 -08 17 30.0 V 703
2022-01-06 12:06:36 C 14 24 55.63 -08 54 25.3 V 703
2022-01-06 12:08:53 C 14 24 55.28 -08 54 28.3 q V40
2022-01-06 12:22:54 C 14 24 56.39 -08 54 51.8 V 703
2022-01-06 12:25:00 C 14 24 55.94 -08 54 53.0 q V40
2022-01-06 12:31:03 C 14 24 56.70 -08 55 03.6 V 703
2022-01-06 12:36:06 C 14 24 56.36 -08 55 09.9 q V40
2022-01-06 12:47:15 C 14 24 56.85 -08 55 27.1 q V40
2022-01-07 12:12:46 C 14 26 21.08 -09 29 58.6 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)