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
2021-10-23 03:03:56 s 1 -173258.98 2 +122732.61 1670.0 – C57
2021-10-23 03:13:56 S 02 59 39.055 +24 42 16.52 – V C57
2021-10-23 03:13:56 s 1 -173214.95 4 +121905.67 9060.0 – C57
2021-10-23 03:23:56 S 02 59 39.418 +24 42 23.00 – V C57
2021-10-23 03:23:56 s 1 -173168.59 9 +121077.10 8280.0 – C57
2021-10-23 03:33:56 S 02 59 40.010 +24 42 26.50 – V C57
2021-10-23 03:33:56 s 1 -173119.90 3 +120246.88 9290.0 – C57
2021-10-23 03:43:56 S 02 59 40.373 +24 42 30.71 – V C57
2021-10-23 03:43:56 s 1 -173068.85 1 +119415.01 2010.0 – C57
2021-10-23 03:53:56 S 02 59 40.831 +24 42 35.75 – V C57
2021-10-23 03:53:56 s 1 -173015.42 6 +118581.50 6410.0 – C57
2021-10-23 04:03:56 S 02 59 41.328 +24 42 40.07 – V C57
2021-10-23 04:03:56 s 1 -172959.61 4 +117746.35 2420.0 – C57
2021-10-23 04:13:56 S 02 59 41.770 +24 42 43.74 – V C57
2021-10-23 04:13:56 s 1 -172901.39 8 +116909.56 0.0 – C57
2021-10-23 04:23:56 S 02 59 42.259 +24 42 48.60 – V C57
2021-10-23 04:23:56 s 1 -172840.76 2 +116071.12 9090.0 – C57
2021-10-23 04:33:56 S 02 59 42.751 +24 42 52.31 – V C57
2021-10-23 04:33:56 s 1 -172777.69 1 +115231.04 9620.0 – C57
2021-10-23 04:43:56 S 02 59 43.154 +24 42 57.06 – V C57
2021-10-23 04:43:56 s 1 -172712.16 8 +114389.32 1560.0 – C57
2021-10-23 04:53:56 S 02 59 43.618 +24 43 02.86 – V C57
2021-10-23 04:53:56 s 1 -172644.17 6 +113545.96 4830.0 – C57
2021-10-23 05:03:56 S 02 59 44.170 +24 43 07.10 – V C57
2021-10-23 05:03:56 s 1 -172573.69 9 +112700.95 9390.0 – C57
2021-10-23 05:13:56 S 02 59 44.582 +24 43 11.64 – V C57
2021-10-23 05:13:56 s 1 -172500.72 0 +111854.31 5170.0 – C57
2021-10-23 05:23:56 S 02 59 45.134 +24 43 14.81 – V C57
2021-10-23 05:23:56 s 1 -172425.22 3 +111006.02 2130.0 – C57
2021-10-23 05:33:56 S 02 59 45.490 +24 43 19.56 – V C57
2021-10-23 05:33:56 s 1 -172347.19 0 +110156.10 190.0 – C57
2021-10-23 05:43:56 S 02 59 45.967 +24 43 23.12 – V C57
2021-10-23 05:43:56 s 1 -172266.60 5 +109304.54 9300.0 – C57
2021-10-23 05:53:56 S 02 59 46.481 +24 43 28.85 – V C57
2021-10-23 05:53:56 s 1 -172183.44 9 +108451.34 9410.0 – C57
2021-10-23 06:03:56 S 02 59 46.999 +24 43 32.84 – V C57
2021-10-23 06:03:56 s 1 -172097.70 6 +107596.51 440.0 – C57
2021-10-23 06:13:56 S 02 59 47.429 +24 43 37.16 – V C57
2021-10-23 06:13:56 s 1 -172009.35 7 +106740.04 2350.0 – C57
2021-10-26 00:53:56 S 03 03 15.936 +25 40 55.34 – V C57
2021-10-26 00:53:56 s 1 +153593.74 8 +22836.875 9840.0 – C57
2021-10-26 01:10:16 C 03 02 29.95 +25 29 59.8 – V C40
2021-10-26 01:11:47 C 03 02 29.98 +25 30 00.9 – V C40
2021-10-26 01:13:20 C 03 02 29.99 +25 30 01.7 – V C40
2021-10-26 01:16:24 C 03 02 30.04 +25 30 03.5 – V C40
2021-10-26 01:19:26 C 03 02 30.08 +25 30 05.1 – V C40
2021-10-26 01:20:59 C 03 02 30.09 +25 30 06.0 – V C40
2021-10-26 01:22:30 C 03 02 30.10 +25 30 06.9 – V C40
2021-10-26 01:23:56 S 03 03 16.198 +25 41 25.40 – V C57
2021-10-26 01:23:56 s 1 +154879.72 7 +25723.496 1780.0 – 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)