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
2021-10-27 12:03:56 S 03 03 03.694 +26 10 37.56 V C57
2021-10-27 12:03:56 s 1 +174716.05 4 +195943.77 3220.0 C57
2021-10-27 12:13:56 S 03 03 03.480 +26 10 44.69 V C57
2021-10-27 12:13:56 s 1 +174602.09 5 +196605.44 3880.0 C57
2021-10-27 12:23:56 S 03 03 03.454 +26 10 52.43 V C57
2021-10-27 12:23:56 s 1 +174486.85 3 +197265.67 240.0 C57
2021-10-27 12:33:56 S 03 03 03.370 +26 10 59.63 V C57
2021-10-27 12:33:56 s 1 +174370.33 6 +197924.44 2340.0 C57
2021-10-27 12:43:56 S 03 03 03.266 +26 11 07.73 V C57
2021-10-27 12:43:56 s 1 +174252.54 8 +198581.77 200.0 C57
2021-10-27 12:53:56 S 03 03 03.146 +26 11 14.86 V C57
2021-10-27 12:53:56 s 1 +174133.49 8 +199237.66 3830.0 C57
2021-10-27 13:03:56 S 03 03 03.041 +26 11 21.23 V C57
2021-10-27 13:03:56 s 1 +174013.19 1 +199892.10 3260.0 C57
2021-10-27 13:13:56 S 03 03 03.053 +26 11 30.19 V C57
2021-10-27 13:13:56 s 1 +173891.63 3 +200545.10 8520.0 C57
2021-10-27 13:23:56 S 03 03 02.806 +26 11 37.18 V C57
2021-10-27 13:23:56 s 1 +173768.83 2 +201196.67 9610.0 C57
2021-10-27 13:33:56 S 03 03 02.698 +26 11 43.84 V C57
2021-10-27 13:33:56 s 1 +173644.79 2 +201846.79 6570.0 C57
2021-10-27 13:43:56 S 03 03 02.659 +26 11 51.83 V C57
2021-10-27 13:43:56 s 1 +173519.52 1 +202495.47 9420.0 C57
2021-10-27 13:53:56 S 03 03 02.527 +26 11 58.99 V C57
2021-10-27 13:53:56 s 1 +173393.02 5 +203142.72 8170.0 C57
2021-10-27 14:03:56 S 03 03 02.486 +26 12 05.36 V C57
2021-10-27 14:03:56 s 1 +173265.30 9 +203788.54 2840.0 C57
2021-10-27 14:13:56 S 03 03 02.395 +26 12 13.86 V C57
2021-10-27 14:13:56 s 1 +173136.38 1 +204432.93 3470.0 C57
2021-10-27 14:23:56 S 03 03 02.318 +26 12 21.56 V C57
2021-10-27 14:23:56 s 1 +173006.24 5 +205075.88 60.0 C57
2021-10-27 14:33:56 S 03 03 02.201 +26 12 28.40 V C57
2021-10-27 14:33:56 s 1 +172874.90 8 +205717.40 2640.0 C57
2021-10-27 14:43:56 S 03 03 02.155 +26 12 35.86 V C57
2021-10-27 14:43:56 s 1 +172742.37 6 +206357.50 1230.0 C57
2021-10-27 14:53:56 S 03 03 02.066 +26 12 43.52 V C57
2021-10-27 14:53:56 s 1 +172608.65 5 +206996.17 5850.0 C57
2021-10-27 15:03:56 S 03 03 01.975 +26 12 51.01 V C57
2021-10-27 15:03:56 s 1 +172473.75 1 +207633.42 6520.0 C57
2021-10-27 15:13:56 S 03 03 01.870 +26 12 58.68 V C57
2021-10-27 15:13:56 s 1 +172337.67 0 +208269.24 3250.0 C57
2021-10-27 15:23:56 S 03 03 01.709 +26 13 05.27 V C57
2021-10-27 15:23:56 s 1 +172200.41 7 +208903.64 6080.0 C57
2021-10-27 15:33:56 S 03 03 01.646 +26 13 12.72 V C57
2021-10-27 15:33:56 s 1 +172061.99 8 +209536.62 5020.0 C57
2021-10-27 15:43:56 S 03 03 01.606 +26 13 20.78 V C57
2021-10-27 15:43:56 s 1 +171922.42 0 +210168.18 80.0 C57
2021-10-27 15:53:56 S 03 03 01.483 +26 13 27.19 V C57
2021-10-27 15:53:56 s 1 +171781.68 7 +210798.33 1290.0 C57
2021-10-27 16:03:56 S 03 03 01.380 +26 13 35.80 V C57
2021-10-27 16:03:56 s 1 +171639.80 6 +211427.06 8670.0 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)