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
2021-11-04 10:33:55 S 03 03 35.892 +28 01 49.26 V C57
2021-11-04 10:33:55 s 1 -161828.05 8 +190541.56 7480.0 C57
2021-11-04 10:43:55 S 03 03 36.211 +28 01 54.34 V C57
2021-11-04 10:43:55 s 1 -161942.28 9 +189847.18 660.0 C57
2021-11-04 10:53:55 S 03 03 36.598 +28 01 59.99 V C57
2021-11-04 10:53:55 s 1 -162055.13 5 +189151.19 8720.0 C57
2021-11-04 11:03:55 S 03 03 36.982 +28 02 04.85 V C57
2021-11-04 11:03:55 s 1 -162166.58 8 +188453.57 1640.0 C57
2021-11-04 11:13:55 S 03 03 37.378 +28 02 09.96 V C57
2021-11-04 11:13:55 s 1 -162276.64 0 +187754.34 9370.0 C57
2021-11-04 11:23:55 S 03 03 37.757 +28 02 16.30 V C57
2021-11-04 11:23:55 s 1 -162385.28 4 +187053.49 1910.0 C57
2021-11-04 11:33:55 S 03 03 38.170 +28 02 22.06 V C57
2021-11-04 11:33:55 s 1 -162492.51 1 +186351.02 9200.0 C57
2021-11-04 11:43:55 S 03 03 38.582 +28 02 27.06 V C57
2021-11-04 11:43:55 s 1 -162598.31 3 +185646.92 1230.0 C57
2021-11-04 11:53:55 S 03 03 38.933 +28 02 32.35 V C57
2021-11-04 11:53:55 s 1 -162702.68 1 +184941.19 7960.0 C57
2021-11-04 12:03:55 S 03 03 39.360 +28 02 37.39 V C57
2021-11-04 12:03:55 s 1 -162805.60 8 +184233.83 9370.0 C57
2021-11-04 12:13:55 S 03 03 39.703 +28 02 43.62 V C57
2021-11-04 12:13:55 s 1 -162907.08 5 +183524.84 5420.0 C57
2021-11-04 12:23:55 S 03 03 40.121 +28 02 49.74 V C57
2021-11-04 12:23:55 s 1 -163007.10 3 +182814.21 6080.0 C57
2021-11-04 12:33:55 S 03 03 40.505 +28 02 55.50 V C57
2021-11-04 12:33:55 s 1 -163105.65 4 +182101.95 1320.0 C57
2021-11-04 12:43:55 S 03 03 40.920 +28 03 00.11 V C57
2021-11-04 12:43:55 s 1 -163202.72 9 +181388.05 1120.0 C57
2021-11-04 12:53:55 S 03 03 41.316 +28 03 05.36 V C57
2021-11-04 12:53:55 s 1 -163298.28 3 +180672.51 5470.0 C57
2021-11-04 13:03:55 S 03 03 41.729 +28 03 11.09 V C57
2021-11-04 13:03:55 s 1 -163390.54 4 +179955.58 6410.0 C57
2021-11-04 13:13:55 S 03 03 42.115 +28 03 18.04 V C57
2021-11-04 13:13:55 s 1 -163483.25 3 +179236.73 9530.0 C57
2021-11-04 13:23:55 S 03 03 42.518 +28 03 23.18 V C57
2021-11-04 13:23:55 s 1 -163574.33 6 +178516.25 7200.0 C57
2021-11-04 13:33:55 S 03 03 42.912 +28 03 28.37 V C57
2021-11-04 13:33:55 s 1 -163663.89 8 +177794.12 9270.0 C57
2021-11-04 13:43:55 S 03 03 43.346 +28 03 33.23 V C57
2021-11-04 13:43:55 s 1 -163751.93 2 +177070.33 5700.0 C57
2021-11-04 13:53:55 S 03 03 43.752 +28 03 38.84 V C57
2021-11-04 13:53:55 s 1 -163838.42 8 +176344.89 6450.0 C57
2021-11-04 14:03:55 S 03 03 44.146 +28 03 45.07 V C57
2021-11-04 14:03:55 s 1 -163923.37 7 +175617.79 1490.0 C57
2021-11-04 14:13:55 S 03 03 44.551 +28 03 51.23 V C57
2021-11-04 14:13:55 s 1 -164006.77 0 +174889.04 790.0 C57
2021-11-04 14:23:55 S 03 03 44.995 +28 03 56.52 V C57
2021-11-04 14:23:55 s 1 -164088.59 7 +174158.62 4310.0 C57
2021-11-04 14:33:55 S 03 03 45.403 +28 04 01.81 V C57
2021-11-04 14:33:55 s 1 -164168.84 8 +173426.54 2030.0 C57
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)