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
2021-11-05 19:43:55 s 1 -140467.63 6 +18873.092 7010.0 C57
2021-11-05 19:50:14 C 03 06 49.93 +28 35 08.8 V C40
2021-11-05 19:51:48 C 03 06 49.93 +28 35 10.0 V C40
2021-11-05 19:53:55 S 03 05 31.728 +28 22 59.88 V C57
2021-11-05 19:53:55 s 1 -139995.01 5 +17855.241 2900.0 C57
2021-11-05 19:54:58 C 03 06 49.95 +28 35 13.1 V C40
2021-11-05 19:56:32 C 03 06 49.96 +28 35 14.4 V C40
2021-11-05 19:58:05 C 03 06 49.97 +28 35 15.9 V C40
2021-11-05 19:59:40 C 03 06 49.98 +28 35 17.3 V C40
2021-11-05 20:02:49 C 03 06 50.00 +28 35 20.0 V C40
2021-11-05 20:03:55 S 03 05 32.554 +28 23 09.17 V C57
2021-11-05 20:03:55 s 1 -139516.41 7 +16836.623 7290.0 C57
2021-11-05 20:04:23 C 03 06 50.00 +28 35 21.6 V C40
2021-11-05 20:05:58 C 03 06 50.00 +28 35 23.0 V C40
2021-11-05 20:07:31 C 03 06 50.01 +28 35 24.3 V C40
2021-11-05 20:09:05 C 03 06 50.02 +28 35 25.6 V C40
2021-11-05 20:13:55 S 03 05 33.432 +28 23 17.09 V C57
2021-11-05 20:13:55 s 1 -139031.78 6 +15817.273 9980.0 C57
2021-11-05 20:20:05 C 03 06 50.06 +28 35 35.5 V C40
2021-11-05 20:23:55 S 03 05 34.294 +28 23 24.22 V C57
2021-11-05 20:23:55 s 1 -138541.06 7 +14797.226 770.0 C57
2021-11-05 20:33:55 S 03 05 35.177 +28 23 32.46 V C57
2021-11-05 20:33:55 s 1 -138044.20 4 +13776.519 9480.0 C57
2021-11-05 20:43:55 S 03 05 36.010 +28 23 41.50 V C57
2021-11-05 20:43:55 s 1 -137541.14 0 +12755.189 5890.0 C57
2021-11-05 20:53:55 S 03 05 36.840 +28 23 50.64 V C57
2021-11-05 20:53:55 s 1 -137031.81 8 +11733.274 9810.0 C57
2021-11-05 21:03:55 S 03 05 37.764 +28 23 58.06 V C57
2021-11-05 21:03:55 s 1 -136516.18 2 +10710.814 1040.0 C57
2021-11-05 21:13:55 S 03 05 38.676 +28 24 05.94 V C57
2021-11-05 21:13:55 s 1 -135994.17 2 + 9687.850 9380.0 C57
2021-11-05 21:23:55 S 03 05 39.530 +28 24 14.51 V C57
2021-11-05 21:23:55 s 1 -135465.73 0 + 8664.423 4620.0 C57
2021-11-05 21:33:55 S 03 05 40.402 +28 24 23.80 V C57
2021-11-05 21:33:55 s 1 -134930.79 7 + 7640.576 6550.0 C57
2021-11-05 21:43:55 S 03 05 41.287 +28 24 31.93 V C57
2021-11-05 21:43:55 s 1 -134389.31 3 + 6616.353 4960.0 C57
2021-11-05 21:53:55 S 03 05 42.221 +28 24 39.38 V C57
2021-11-05 21:53:55 s 1 -133841.21 7 + 5591.801 9650.0 C57
2021-11-05 22:03:55 S 03 05 43.147 +28 24 48.02 V C57
2021-11-05 22:03:55 s 1 -133286.45 0 + 4566.965 400.0 C57
2021-11-05 22:13:55 S 03 05 44.026 +28 24 57.53 V C57
2021-11-05 22:13:55 s 1 -132724.95 0 + 3541.893 6990.0 C57
2021-11-05 22:23:55 S 03 05 44.866 +28 25 05.77 V C57
2021-11-05 22:23:55 s 1 -132156.65 5 + 2516.636 9220.0 C57
2021-11-06 05:19:38 C 03 07 00.09 +28 43 31.8 V 703
2021-11-06 05:27:15 C 03 07 00.11 +28 43 38.9 V 703
2021-11-06 05:34:53 C 03 07 00.13 +28 43 45.9 V 703
2021-11-06 05:42:29 C 03 07 00.15 +28 43 52.9 V 703
2021-11-06 11:49:56 C 03 07 01.02 +28 49 02.8 t 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)