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 18:16:10 C 03 05 17.26 +27 17 30.8 V C40
2021-11-01 18:17:45 C 03 05 17.27 +27 17 32.3 V C40
2021-11-01 18:22:26 C 03 05 17.32 +27 17 36.0 V C40
2021-11-01 18:23:55 S 03 02 23.863 +27 27 52.27 V C57
2021-11-01 18:23:55 s 1 -59430.515 0 +355619.20 1180.0 C57
2021-11-01 18:24:02 C 03 05 17.34 +27 17 37.3 V C40
2021-11-01 18:28:43 C 03 05 17.37 +27 17 40.9 V C40
2021-11-01 18:30:18 C 03 05 17.38 +27 17 42.1 V C40
2021-11-01 18:33:27 C 03 05 17.39 +27 17 44.7 V C40
2021-11-01 18:33:56 S 03 02 23.950 +27 27 58.32 V C57
2021-11-01 18:33:56 s 1 -59778.216 0 +355421.51 3500.0 C57
2021-11-01 18:38:09 C 03 05 17.44 +27 17 48.5 V C40
2021-11-01 18:39:43 C 03 05 17.45 +27 17 49.6 V C40
2021-11-01 18:43:55 S 03 02 24.029 +27 28 02.86 V C57
2021-11-01 18:43:55 s 1 -60125.721 0 +355222.73 5020.0 C57
2021-11-01 18:46:01 C 03 05 17.50 +27 17 54.7 V C40
2021-11-01 18:52:10 C 03 05 17.53 +27 17 59.4 V C40
2021-11-01 18:53:43 C 03 05 17.56 +27 18 00.6 V C40
2021-11-01 18:53:56 S 03 02 24.091 +27 28 08.22 V C57
2021-11-01 18:53:56 s 1 -60473.029 0 +355022.87 5760.0 C57
2021-11-01 18:55:27 C 03 05 17.56 +27 18 01.9 V C40
2021-11-01 18:57:00 C 03 05 17.57 +27 18 03.2 V C40
2021-11-01 18:58:35 C 03 05 17.58 +27 18 04.4 V C40
2021-11-01 19:00:09 C 03 05 17.60 +27 18 05.8 V C40
2021-11-01 19:01:43 C 03 05 17.61 +27 18 07.0 V C40
2021-11-01 19:03:18 C 03 05 17.63 +27 18 08.2 V C40
2021-11-01 19:03:55 S 03 02 24.127 +27 28 13.51 V C57
2021-11-01 19:03:55 s 1 -60820.140 0 +354821.92 5700.0 C57
2021-11-01 19:04:53 C 03 05 17.63 +27 18 09.5 V C40
2021-11-01 19:06:27 C 03 05 17.64 +27 18 10.6 V C40
2021-11-01 19:08:00 C 03 05 17.65 +27 18 11.8 V C40
2021-11-01 19:13:55 S 03 02 24.168 +27 28 19.38 V C57
2021-11-01 19:13:55 s 1 -61167.050 0 +354619.88 4840.0 C57
2021-11-01 19:14:18 C 03 05 17.69 +27 18 16.7 V C40
2021-11-01 19:23:44 C 03 05 17.76 +27 18 24.0 V C40
2021-11-01 19:23:55 S 03 02 24.221 +27 28 24.31 V C57
2021-11-01 19:23:55 s 1 -61513.761 0 +354416.75 3170.0 C57
2021-11-01 19:33:55 S 03 02 24.230 +27 28 29.10 V C57
2021-11-01 19:33:55 s 1 -61860.269 0 +354212.52 690.0 C57
2021-11-01 19:43:56 S 03 02 24.324 +27 28 34.28 V C57
2021-11-01 19:43:56 s 1 -62206.574 0 +354007.21 7400.0 C57
2021-11-01 19:53:55 S 03 02 24.374 +27 28 41.12 V C57
2021-11-01 19:53:55 s 1 -62552.674 0 +353800.80 3290.0 C57
2021-11-01 20:03:56 S 03 02 24.425 +27 28 45.88 V C57
2021-11-01 20:03:56 s 1 -62898.569 0 +353593.31 8350.0 C57
2021-11-01 20:13:55 S 03 02 24.516 +27 28 51.20 V C57
2021-11-01 20:13:55 s 1 -63244.257 0 +353384.71 2590.0 C57
2021-11-01 20:23:56 S 03 02 24.607 +27 28 56.24 V C57
2021-11-01 20:23:56 s 1 -63589.736 0 +353175.03 5990.0 C57
2021-11-01 20:33:55 S 03 02 24.610 +27 29 02.15 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)