IAA RAS IAA Minor Planet Database

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
2021-10-14 01:43:56 S 02 56 11.206 +23 07 12.00 – V C57
2021-10-14 01:43:56 s 1 +174235.11 5 +134481.71 8350.0 – C57
2021-10-14 01:53:56 S 02 56 11.347 +23 07 16.46 – V C57
2021-10-14 01:53:56 s 1 +174250.50 7 +135281.25 5640.0 – C57
2021-10-14 02:03:56 S 02 56 11.275 +23 07 22.87 – V C57
2021-10-14 02:03:56 s 1 +174263.79 3 +136079.16 5840.0 – C57
2021-10-14 02:13:56 S 02 56 11.417 +23 07 29.64 – V C57
2021-10-14 02:13:56 s 1 +174274.98 7 +136875.44 9000.0 – C57
2021-10-14 02:23:56 S 02 56 11.611 +23 07 35.26 – V C57
2021-10-14 02:23:56 s 1 +174284.10 0 +137670.08 5170.0 – C57
2021-10-14 02:33:56 S 02 56 11.710 +23 07 41.05 – V C57
2021-10-14 02:33:56 s 1 +174291.14 7 +138463.09 4380.0 – C57
2021-10-14 02:43:56 S 02 56 11.664 +23 07 47.35 – V C57
2021-10-14 02:43:56 s 1 +174296.14 0 +139254.48 6700.0 – C57
2021-10-14 02:53:56 S 02 56 11.729 +23 07 54.08 – V C57
2021-10-14 02:53:56 s 1 +174299.09 1 +140044.23 2150.0 – C57
2021-10-14 03:03:56 S 02 56 11.803 +23 07 59.81 – V C57
2021-10-14 03:03:56 s 1 +174300.01 4 +140832.35 780.0 – C57
2021-10-14 03:13:56 S 02 56 11.873 +23 08 04.02 – V C57
2021-10-14 03:13:56 s 1 +174298.92 1 +141618.84 2630.0 – C57
2021-10-14 03:23:56 S 02 56 12.048 +23 08 08.88 – V C57
2021-10-14 03:23:56 s 1 +174295.82 5 +142403.71 7740.0 – C57
2021-10-14 03:33:56 S 02 56 12.103 +23 08 17.59 – V C57
2021-10-14 03:33:56 s 1 +174290.73 7 +143186.95 6170.0 – C57
2021-10-14 03:43:56 S 02 56 12.134 +23 08 23.10 – V C57
2021-10-14 03:43:56 s 1 +174283.67 0 +143968.57 7930.0 – C57
2021-10-14 03:53:56 S 02 56 12.281 +23 08 28.75 – V C57
2021-10-14 03:53:56 s 1 +174274.63 6 +144748.56 3090.0 – C57
2021-10-14 04:03:56 S 02 56 12.367 +23 08 33.07 – V C57
2021-10-14 04:03:56 s 1 +174263.64 7 +145526.93 1680.0 – C57
2021-10-14 04:13:56 S 02 56 12.281 +23 08 41.64 – V C57
2021-10-14 04:13:56 s 1 +174250.71 5 +146303.68 3730.0 – C57
2021-10-14 04:23:56 S 02 56 12.430 +23 08 47.26 – V C57
2021-10-14 04:23:56 s 1 +174235.85 2 +147078.81 9300.0 – C57
2021-10-14 04:33:56 S 02 56 12.384 +23 08 55.68 – V C57
2021-10-14 04:33:56 s 1 +174219.06 9 +147852.32 8410.0 – C57
2021-10-14 04:43:56 S 02 56 12.703 +23 08 57.37 – V C57
2021-10-14 04:43:56 s 1 +174200.37 9 +148624.21 1110.0 – C57
2021-10-14 04:53:56 S 02 56 12.648 +23 09 03.10 – V C57
2021-10-14 04:53:56 s 1 +174179.79 2 +149394.48 7430.0 – C57
2021-10-14 05:23:56 S 02 56 13.003 +23 09 22.64 – V C57
2021-10-14 05:23:56 s 1 +174106.76 7 +151695.61 8560.0 – C57
2021-10-14 05:53:56 S 02 56 13.385 +23 09 40.86 – V C57
2021-10-14 05:53:56 s 1 +174017.08 1 +153982.23 3700.0 – C57
2021-10-14 06:03:56 S 02 56 13.118 +23 09 42.37 – V C57
2021-10-14 06:03:56 s 1 +173983.53 4 +154741.22 6480.0 – C57
2021-10-14 06:13:56 S 02 56 13.243 +23 09 52.81 – V C57
2021-10-14 06:13:56 s 1 +173948.18 0 +155498.60 3190.0 – C57
2021-10-14 06:23:56 S 02 56 13.246 +23 09 54.86 – V C57
2021-10-14 06:23:56 s 1 +173911.02 9 +156254.38 3860.0 – 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)