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
2021-11-03 05:43:55 S 03 02 48.329 +27 46 26.83 V C57
2021-11-03 05:43:55 s 1 -126464.84 0 +288243.14 4370.0 C57
2021-11-03 05:53:55 S 03 02 48.478 +27 46 33.31 V C57
2021-11-03 05:53:55 s 1 -126735.95 8 +287797.11 2210.0 C57
2021-11-03 06:03:55 S 03 02 48.720 +27 46 38.60 V C57
2021-11-03 06:03:55 s 1 -127006.49 8 +287349.80 7870.0 C57
2021-11-03 06:13:55 S 03 02 48.902 +27 46 43.25 V C57
2021-11-03 06:13:55 s 1 -127276.45 8 +286901.19 1340.0 C57
2021-11-03 06:23:55 S 03 02 49.114 +27 46 48.04 V C57
2021-11-03 06:23:55 s 1 -127545.83 5 +286451.30 2610.0 C57
2021-11-03 06:33:55 S 03 02 49.289 +27 46 53.26 V C57
2021-11-03 06:33:55 s 1 -127814.62 6 +286000.11 1670.0 C57
2021-11-03 06:43:55 S 03 02 49.454 +27 46 59.63 V C57
2021-11-03 06:43:55 s 1 -128082.82 8 +285547.64 8520.0 C57
2021-11-03 06:53:55 S 03 02 49.682 +27 47 04.85 V C57
2021-11-03 06:53:55 s 1 -128350.43 9 +285093.87 3130.0 C57
2021-11-03 07:03:55 S 03 02 49.853 +27 47 09.31 V C57
2021-11-03 07:03:55 s 1 -128617.45 6 +284638.81 5510.0 C57
2021-11-03 07:13:55 S 03 02 50.086 +27 47 14.53 V C57
2021-11-03 07:13:55 s 1 -128883.87 6 +284182.45 5640.0 C57
2021-11-03 07:23:55 S 03 02 50.246 +27 47 19.75 V C57
2021-11-03 07:23:55 s 1 -129149.69 6 +283724.79 3510.0 C57
2021-11-03 07:33:55 S 03 02 50.441 +27 47 26.09 V C57
2021-11-03 07:33:55 s 1 -129414.91 4 +283265.83 9120.0 C57
2021-11-03 07:43:55 S 03 02 50.623 +27 47 30.80 V C57
2021-11-03 07:43:55 s 1 -129679.52 7 +282805.57 2440.0 C57
2021-11-03 07:53:55 S 03 02 50.820 +27 47 35.70 V C57
2021-11-03 07:53:55 s 1 -129943.53 1 +282344.02 3470.0 C57
2021-11-03 08:03:55 S 03 02 51.058 +27 47 40.34 V C57
2021-11-03 08:03:55 s 1 -130206.92 4 +281881.15 2210.0 C57
2021-11-03 08:13:55 S 03 02 51.259 +27 47 46.64 V C57
2021-11-03 08:13:55 s 1 -130469.70 3 +281416.99 8630.0 C57
2021-11-03 08:23:55 S 03 02 51.473 +27 47 52.19 V C57
2021-11-03 08:23:55 s 1 -130731.86 6 +280951.51 2730.0 C57
2021-11-03 08:33:55 S 03 02 51.650 +27 47 57.05 V C57
2021-11-03 08:33:55 s 1 -130993.40 8 +280484.73 4500.0 C57
2021-11-03 08:43:55 S 03 02 51.866 +27 48 01.40 V C57
2021-11-03 08:43:55 s 1 -131254.32 8 +280016.64 3930.0 C57
2021-11-03 08:53:55 S 03 02 52.063 +27 48 07.02 V C57
2021-11-03 08:53:55 s 1 -131514.62 3 +279547.24 1000.0 C57
2021-11-03 09:03:55 S 03 02 52.270 +27 48 13.21 V C57
2021-11-03 09:03:55 s 1 -131774.28 9 +279076.52 5710.0 C57
2021-11-03 09:13:55 S 03 02 52.514 +27 48 18.47 V C57
2021-11-03 09:13:55 s 1 -132033.32 3 +278604.49 8040.0 C57
2021-11-03 09:23:55 S 03 02 52.634 +27 48 23.51 V C57
2021-11-03 09:23:55 s 1 -132291.72 3 +278131.15 7990.0 C57
2021-11-03 09:33:55 S 03 02 52.903 +27 48 27.61 V C57
2021-11-03 09:33:55 s 1 -132549.48 6 +277656.49 5550.0 C57
2021-11-03 09:43:55 S 03 02 53.134 +27 48 33.52 V C57
2021-11-03 09:43:55 s 1 -132806.60 8 +277180.51 690.0 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)