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 14:43:55 S 03 03 45.823 +28 04 06.53 V C57
2021-11-04 14:43:55 s 1 -164247.51 6 +172692.79 3900.0 C57
2021-11-04 14:53:55 S 03 03 46.238 +28 04 12.94 V C57
2021-11-04 14:53:55 s 1 -164324.58 9 +171957.37 9890.0 C57
2021-11-04 15:03:55 S 03 03 46.702 +28 04 19.74 V C57
2021-11-04 15:03:55 s 1 -164400.05 8 +171220.28 9960.0 C57
2021-11-04 15:13:55 S 03 03 47.122 +28 04 24.74 V C57
2021-11-04 15:13:55 s 1 -164473.91 4 +170481.52 4090.0 C57
2021-11-04 15:23:55 S 03 03 47.508 +28 04 29.32 V C57
2021-11-04 15:23:55 s 1 -164546.14 7 +169741.08 2240.0 C57
2021-11-04 15:33:55 S 03 03 47.926 +28 04 34.54 V C57
2021-11-04 15:33:55 s 1 -164616.74 7 +168998.96 4360.0 C57
2021-11-04 15:34:05 C 03 06 24.02 +28 11 10.4 V C40
2021-11-04 15:35:39 C 03 06 24.03 +28 11 11.8 V C40
2021-11-04 15:37:12 C 03 06 24.06 +28 11 13.1 V C40
2021-11-04 15:41:55 C 03 06 24.11 +28 11 17.4 V C40
2021-11-04 15:43:55 S 03 03 48.374 +28 04 41.09 V C57
2021-11-04 15:43:55 s 1 -164685.70 3 +168255.17 430.0 C57
2021-11-04 15:46:39 C 03 06 24.19 +28 11 21.7 V C40
2021-11-04 15:53:55 S 03 03 48.814 +28 04 46.52 V C57
2021-11-04 15:53:55 s 1 -164753.00 7 +167509.69 400.0 C57
2021-11-04 16:03:55 S 03 03 49.174 +28 04 53.22 V C57
2021-11-04 16:03:55 s 1 -164818.64 7 +166762.53 4250.0 C57
2021-11-04 16:13:55 S 03 03 49.690 +28 04 58.19 V C57
2021-11-04 16:13:55 s 1 -164882.61 4 +166013.69 1930.0 C57
2021-11-04 16:23:55 S 03 03 50.093 +28 05 03.16 V C57
2021-11-04 16:23:55 s 1 -164944.89 7 +165263.15 3400.0 C57
2021-11-04 16:33:55 S 03 03 50.520 +28 05 08.59 V C57
2021-11-04 16:33:55 s 1 -165005.48 6 +164510.92 8640.0 C57
2021-11-04 16:43:55 S 03 03 50.952 +28 05 15.50 V C57
2021-11-04 16:43:55 s 1 -165064.37 1 +163757.00 7600.0 C57
2021-11-04 16:53:55 S 03 03 51.377 +28 05 21.62 V C57
2021-11-04 16:53:55 s 1 -165121.54 0 +163001.39 240.0 C57
2021-11-04 17:03:55 S 03 03 51.799 +28 05 27.53 V C57
2021-11-04 17:03:55 s 1 -165176.98 3 +162244.08 6520.0 C57
2021-11-04 17:13:55 S 03 03 52.246 +28 05 32.10 V C57
2021-11-04 17:13:55 s 1 -165230.69 0 +161485.07 6410.0 C57
2021-11-04 17:23:55 S 03 03 52.702 +28 05 37.18 V C57
2021-11-04 17:23:55 s 1 -165282.64 9 +160724.36 9860.0 C57
2021-11-04 17:33:55 S 03 03 53.194 +28 05 43.26 V C57
2021-11-04 17:33:55 s 1 -165332.85 1 +159961.94 6840.0 C57
2021-11-04 17:43:55 S 03 03 53.633 +28 05 48.98 V C57
2021-11-04 17:43:55 s 1 -165381.28 2 +159197.82 7310.0 C57
2021-11-04 17:53:55 S 03 03 54.072 +28 05 55.32 V C57
2021-11-04 17:53:55 s 1 -165427.93 4 +158431.99 1230.0 C57
2021-11-04 18:03:55 S 03 03 54.547 +28 06 00.76 V C57
2021-11-04 18:03:55 s 1 -165472.79 3 +157664.45 8550.0 C57
2021-11-04 18:13:55 S 03 03 54.955 +28 06 06.66 V C57
2021-11-04 18:13:55 s 1 -165515.85 0 +156895.20 9230.0 C57
2021-11-04 18:23:55 S 03 03 55.421 +28 06 11.09 V 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)