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 18:23:56 S 03 02 59.911 +26 15 17.64 V C57
2021-10-27 18:23:56 s 1 +169535.97 7 +220081.54 60.0 C57
2021-10-27 18:26:40 C 03 03 17.90 +25 55 35.9 V C40
2021-10-27 18:28:15 C 03 03 17.93 +25 55 36.9 V C40
2021-10-27 18:29:49 C 03 03 17.94 +25 55 38.1 V C40
2021-10-27 18:31:24 C 03 03 17.96 +25 55 39.2 V C40
2021-10-27 18:32:57 C 03 03 17.98 +25 55 40.1 V C40
2021-10-27 18:33:56 S 03 02 59.887 +26 15 23.76 V C57
2021-10-27 18:33:56 s 1 +169377.52 7 +220689.23 2190.0 C57
2021-10-27 18:36:06 C 03 03 18.01 +25 55 42.4 V C40
2021-10-27 18:37:41 C 03 03 18.04 +25 55 43.5 V C40
2021-10-27 18:39:15 C 03 03 18.05 +25 55 44.5 V C40
2021-10-27 18:42:23 C 03 03 18.08 +25 55 46.5 V C40
2021-10-27 18:43:56 S 03 02 59.851 +26 15 30.42 V C57
2021-10-27 18:43:56 s 1 +169218.01 5 +221295.52 770.0 C57
2021-10-27 18:43:57 C 03 03 18.10 +25 55 47.7 V C40
2021-10-27 18:45:32 C 03 03 18.12 +25 55 48.8 V C40
2021-10-27 18:48:41 C 03 03 18.16 +25 55 50.9 V C40
2021-10-27 18:51:50 C 03 03 18.20 +25 55 52.9 V C40
2021-10-27 18:53:56 S 03 02 59.678 +26 15 39.53 V C57
2021-10-27 18:53:56 s 1 +169057.44 5 +221900.43 5830.0 C57
2021-10-27 19:03:56 S 03 02 59.544 +26 15 46.48 V C57
2021-10-27 19:03:56 s 1 +168895.82 3 +222503.95 7390.0 C57
2021-10-27 19:13:56 S 03 02 59.518 +26 15 52.38 V C57
2021-10-27 19:13:56 s 1 +168733.15 4 +223106.08 5450.0 C57
2021-10-27 19:23:56 S 03 02 59.414 +26 16 00.44 V C57
2021-10-27 19:23:56 s 1 +168569.44 3 +223706.82 50.0 C57
2021-10-27 19:33:56 S 03 02 59.354 +26 16 07.14 V C57
2021-10-27 19:33:56 s 1 +168404.69 5 +224306.18 1190.0 C57
2021-10-27 19:53:56 S 03 02 59.110 +26 16 22.19 V C57
2021-10-27 19:53:56 s 1 +168072.10 8 +225500.77 3180.0 C57
2021-10-27 20:03:56 S 03 02 59.014 +26 16 28.16 V C57
2021-10-27 20:03:56 s 1 +167904.27 8 +226095.99 4060.0 C57
2021-10-27 20:13:56 S 03 02 58.990 +26 16 36.30 V C57
2021-10-27 20:13:56 s 1 +167735.43 1 +226689.83 1550.0 C57
2021-10-27 20:23:56 S 03 02 58.788 +26 16 44.54 V C57
2021-10-27 20:23:56 s 1 +167565.57 2 +227282.30 5670.0 C57
2021-10-27 20:33:56 S 03 02 58.678 +26 16 48.94 V C57
2021-10-27 20:33:56 s 1 +167394.70 5 +227873.40 6440.0 C57
2021-10-27 20:43:56 S 03 02 58.651 +26 16 57.90 V C57
2021-10-27 20:43:56 s 1 +167222.83 4 +228463.12 3870.0 C57
2021-10-27 21:36:25 C 03 03 20.49 +25 57 36.8 Y 557
2021-10-27 22:03:56 S 03 02 57.746 +26 17 54.02 V C57
2021-10-27 22:03:56 s 1 +165812.32 7 +233131.66 5020.0 C57
2021-10-27 22:13:56 S 03 02 57.619 +26 18 01.48 V C57
2021-10-27 22:13:56 s 1 +165631.64 0 +233709.09 3110.0 C57
2021-10-27 22:23:56 S 03 02 57.552 +26 18 08.28 V C57
2021-10-27 22:23:56 s 1 +165449.99 6 +234285.17 8020.0 C57
2021-10-27 22:28:55 C 03 03 20.98 +25 58 11.3 Y 557
2021-10-27 22:33:56 S 03 02 57.422 +26 18 15.59 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)