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
2021-10-30 07:13:56 s 1 +68025.339 0 +359316.53 5890.0 C57
2021-10-30 10:53:56 S 03 02 26.671 +26 56 53.56 V C57
2021-10-30 10:53:56 s 1 +60322.626 0 +362903.54 3660.0 C57
2021-10-30 11:03:56 S 03 02 26.609 +26 57 00.65 V C57
2021-10-30 11:03:56 s 1 +59970.525 0 +363054.47 4980.0 C57
2021-10-30 11:09:29 C 03 04 21.64 +26 38 44.1 V T08
2021-10-30 11:11:29 C 03 04 21.65 +26 38 45.5 V T08
2021-10-30 11:13:56 S 03 02 26.573 +26 57 06.01 V C57
2021-10-30 11:13:56 s 1 +59618.261 0 +363204.34 5820.0 C57
2021-10-30 11:14:08 C 03 04 21.66 +26 38 47.1 V T08
2021-10-30 11:22:18 C 03 04 21.67 +26 38 52.7 V T08
2021-10-30 11:22:57 C 03 04 21.67 +26 38 53.2 V T08
2021-10-30 11:23:56 S 03 02 26.496 +26 57 11.09 V C57
2021-10-30 11:23:56 s 1 +59265.835 0 +363353.17 6190.0 C57
2021-10-30 11:29:39 C 03 04 21.69 +26 38 57.7 V T08
2021-10-30 11:33:56 S 03 02 26.520 +26 57 17.03 V C57
2021-10-30 11:33:56 s 1 +58913.249 0 +363500.94 6100.0 C57
2021-10-30 11:41:16 C 03 04 21.72 +26 39 05.5 V T08
2021-10-30 11:43:56 S 03 02 26.388 +26 57 23.80 V C57
2021-10-30 11:43:56 s 1 +58560.503 0 +363647.67 5530.0 C57
2021-10-30 11:51:36 C 03 04 21.74 +26 39 12.4 V T08
2021-10-30 11:53:56 S 03 02 26.393 +26 57 29.12 V C57
2021-10-30 11:53:56 s 1 +58207.600 0 +363793.34 4510.0 C57
2021-10-30 12:03:56 S 03 02 26.374 +26 57 34.70 V C57
2021-10-30 12:03:56 s 1 +57854.539 0 +363937.97 3030.0 C57
2021-10-30 12:13:56 S 03 02 26.230 +26 57 42.23 V C57
2021-10-30 12:13:56 s 1 +57501.323 0 +364081.54 1100.0 C57
2021-10-30 12:23:56 S 03 02 26.268 +26 57 47.45 V C57
2021-10-30 12:23:56 s 1 +57147.952 0 +364224.06 8720.0 C57
2021-10-30 12:33:56 S 03 02 26.146 +26 57 52.92 V C57
2021-10-30 12:33:56 s 1 +56794.427 0 +364365.54 5890.0 C57
2021-10-30 12:43:56 S 03 02 26.088 +26 57 58.75 V C57
2021-10-30 12:43:56 s 1 +56440.750 0 +364505.97 2630.0 C57
2021-10-30 12:53:56 S 03 02 26.050 +26 58 04.76 V C57
2021-10-30 12:53:56 s 1 +56086.921 0 +364645.35 8920.0 C57
2021-10-30 13:03:56 S 03 02 25.994 +26 58 10.42 V C57
2021-10-30 13:03:56 s 1 +55732.943 0 +364783.68 4780.0 C57
2021-10-30 13:13:56 S 03 02 25.898 +26 58 16.25 V C57
2021-10-30 13:13:56 s 1 +55378.815 0 +364920.96 220.0 C57
2021-10-30 13:23:56 S 03 02 25.858 +26 58 22.51 V C57
2021-10-30 13:23:56 s 1 +55024.540 0 +365057.19 5220.0 C57
2021-10-30 13:33:56 S 03 02 25.774 +26 58 28.96 V C57
2021-10-30 13:33:56 s 1 +54670.117 0 +365192.38 9810.0 C57
2021-10-30 13:43:56 S 03 02 25.716 +26 58 33.64 V C57
2021-10-30 13:43:56 s 1 +54315.549 0 +365326.52 3980.0 C57
2021-10-30 13:53:56 S 03 02 25.656 +26 58 39.14 V C57
2021-10-30 13:53:56 s 1 +53960.837 0 +365459.61 7730.0 C57
2021-10-30 14:03:56 S 03 02 25.615 +26 58 45.95 V C57
2021-10-30 14:03:56 s 1 +53605.981 0 +365591.66 1080.0 C57
2021-10-30 14:13:56 S 03 02 25.582 +26 58 52.21 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)