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
2021-11-01 14:13:55 S 03 02 22.718 +27 25 36.48 V C57
2021-11-01 14:13:55 s 1 -50678.044 0 +360209.27 290.0 C57
2021-11-01 14:23:56 S 03 02 22.656 +27 25 44.15 V C57
2021-11-01 14:23:56 s 1 -51030.234 0 +360038.62 860.0 C57
2021-11-01 14:33:55 S 03 02 22.678 +27 25 49.22 V C57
2021-11-01 14:33:55 s 1 -51382.259 0 +359866.89 750.0 C57
2021-11-01 14:43:56 S 03 02 22.786 +27 25 53.15 V C57
2021-11-01 14:43:56 s 1 -51734.118 0 +359694.09 9950.0 C57
2021-11-01 14:53:55 S 03 02 22.769 +27 25 59.23 V C57
2021-11-01 14:53:55 s 1 -52085.810 0 +359520.21 8470.0 C57
2021-11-01 15:03:55 S 03 02 22.822 +27 26 05.10 V C57
2021-11-01 15:03:55 s 1 -52437.333 0 +359345.25 6310.0 C57
2021-11-01 15:13:56 S 03 02 22.908 +27 26 10.86 V C57
2021-11-01 15:13:56 s 1 -52788.686 0 +359169.21 3440.0 C57
2021-11-01 15:23:55 S 03 02 22.954 +27 26 15.50 V C57
2021-11-01 15:23:55 s 1 -53139.868 0 +358992.10 9880.0 C57
2021-11-01 15:33:56 S 03 02 23.042 +27 26 20.08 V C57
2021-11-01 15:33:56 s 1 -53490.878 0 +358813.91 5610.0 C57
2021-11-01 15:43:55 S 03 02 23.095 +27 26 27.28 V C57
2021-11-01 15:43:55 s 1 -53841.714 0 +358634.64 640.0 C57
2021-11-01 15:53:56 S 03 02 23.160 +27 26 31.67 V C57
2021-11-01 15:53:56 s 1 -54192.376 0 +358454.29 4950.0 C57
2021-11-01 16:03:55 S 03 02 23.184 +27 26 36.96 V C57
2021-11-01 16:03:55 s 1 -54542.862 0 +358272.86 8540.0 C57
2021-11-01 16:13:56 S 03 02 23.203 +27 26 42.14 V C57
2021-11-01 16:13:56 s 1 -54893.171 0 +358090.35 1420.0 C57
2021-11-01 16:23:55 S 03 02 23.263 +27 26 48.37 V C57
2021-11-01 16:23:55 s 1 -55243.302 0 +357906.76 3570.0 C57
2021-11-01 16:33:55 S 03 02 23.316 +27 26 53.63 V C57
2021-11-01 16:33:55 s 1 -55593.253 0 +357722.09 4990.0 C57
2021-11-01 16:43:56 S 03 02 23.340 +27 26 58.13 V C57
2021-11-01 16:43:56 s 1 -55943.023 0 +357536.33 5670.0 C57
2021-11-01 16:53:55 S 03 02 23.405 +27 27 03.64 V C57
2021-11-01 16:53:55 s 1 -56292.611 0 +357349.50 5620.0 C57
2021-11-01 17:03:56 S 03 02 23.467 +27 27 09.79 V C57
2021-11-01 17:03:56 s 1 -56642.017 0 +357161.58 4830.0 C57
2021-11-01 17:13:55 S 03 02 23.513 +27 27 15.44 V C57
2021-11-01 17:13:55 s 1 -56991.237 0 +356972.58 3280.0 C57
2021-11-01 17:23:56 S 03 02 23.573 +27 27 20.09 V C57
2021-11-01 17:23:56 s 1 -57340.272 0 +356782.49 990.0 C57
2021-11-01 17:33:55 S 03 02 23.630 +27 27 24.91 V C57
2021-11-01 17:33:55 s 1 -57689.121 0 +356591.32 7940.0 C57
2021-11-01 17:43:56 S 03 02 23.693 +27 27 30.60 V C57
2021-11-01 17:43:56 s 1 -58037.781 0 +356399.07 4120.0 C57
2021-11-01 17:53:55 S 03 02 23.738 +27 27 36.58 V C57
2021-11-01 17:53:55 s 1 -58386.252 0 +356205.73 9550.0 C57
2021-11-01 18:03:55 S 03 02 23.796 +27 27 41.65 V C57
2021-11-01 18:03:55 s 1 -58734.532 0 +356011.31 4200.0 C57
2021-11-01 18:13:56 S 03 02 23.796 +27 27 46.55 V C57
2021-11-01 18:13:56 s 1 -59082.620 0 +355815.79 8080.0 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)