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
2021-10-26 01:24:03 C 03 02 30.14 +25 30 07.9 – V C40
2021-10-26 01:28:37 C 03 02 30.19 +25 30 10.3 – V C40
2021-10-26 01:31:41 C 03 02 30.22 +25 30 12.0 – V C40
2021-10-26 01:33:14 C 03 02 30.26 +25 30 12.8 – V C40
2021-10-26 01:34:45 C 03 02 30.27 +25 30 13.8 – V C40
2021-10-26 01:36:18 C 03 02 30.27 +25 30 14.6 – V C40
2021-10-26 01:37:50 C 03 02 30.31 +25 30 15.6 – V C40
2021-10-26 01:43:56 S 03 03 16.193 +25 41 45.71 – V C57
2021-10-26 01:43:56 s 1 +155712.53 7 +27643.887 2650.0 – C57
2021-10-26 01:46:00 C 03 02 30.41 +25 30 20.0 – V C40
2021-10-26 01:47:33 C 03 02 30.42 +25 30 21.1 – V C40
2021-10-26 01:49:04 C 03 02 30.45 +25 30 22.0 – V C40
2021-10-26 01:55:11 C 03 02 30.54 +25 30 25.2 – V C40
2021-10-26 01:56:43 C 03 02 30.54 +25 30 26.3 – V C40
2021-10-26 01:58:16 C 03 02 30.57 +25 30 27.0 – V C40
2021-10-26 01:59:47 C 03 02 30.58 +25 30 27.9 – V C40
2021-10-26 02:01:20 C 03 02 30.61 +25 30 28.7 – V C40
2021-10-26 02:02:50 C 03 02 30.63 +25 30 29.7 – V C40
2021-10-26 02:03:56 S 03 03 16.123 +25 42 04.46 – V C57
2021-10-26 02:03:56 s 1 +156526.09 6 +29560.860 7780.0 – C57
2021-10-26 02:04:23 C 03 02 30.65 +25 30 30.4 – V C40
2021-10-26 02:08:58 C 03 02 30.72 +25 30 33.1 – V C40
2021-10-26 02:11:40 C 03 02 30.75 +25 30 34.4 – V C40
2021-10-26 02:13:12 C 03 02 30.76 +25 30 35.4 – V C40
2021-10-26 02:13:56 S 03 03 16.121 +25 42 14.51 – V C57
2021-10-26 02:13:56 s 1 +156925.75 1 +30518.015 6010.0 – C57
2021-10-26 02:14:43 C 03 02 30.79 +25 30 36.2 – V C40
2021-10-26 02:16:16 C 03 02 30.81 +25 30 37.2 – V C40
2021-10-26 02:17:47 C 03 02 30.82 +25 30 38.0 – V C40
2021-10-26 02:20:51 C 03 02 30.87 +25 30 39.8 – V C40
2021-10-26 02:23:54 C 03 02 30.92 +25 30 41.5 – V C40
2021-10-26 02:23:56 S 03 03 16.130 +25 42 22.54 – V C57
2021-10-26 02:23:56 s 1 +157320.70 6 +31474.255 8190.0 – C57
2021-10-26 02:26:58 C 03 02 30.96 +25 30 43.0 – V C40
2021-10-26 02:34:37 C 03 02 31.06 +25 30 47.4 – V C40
2021-10-26 02:36:10 C 03 02 31.09 +25 30 48.3 – V C40
2021-10-26 02:39:14 C 03 02 31.14 +25 30 49.8 – V C40
2021-10-26 02:53:56 S 03 03 16.193 +25 42 51.98 – V C57
2021-10-26 02:53:56 s 1 +158477.73 3 +34337.302 9720.0 – C57
2021-10-26 03:03:56 S 03 03 16.202 +25 43 01.45 – V C57
2021-10-26 03:03:56 s 1 +158854.25 0 +35289.700 8980.0 – C57
2021-10-26 03:33:56 S 03 03 16.162 +25 43 30.83 – V C57
2021-10-26 03:33:56 s 1 +159956.82 0 +38140.802 4720.0 – C57
2021-10-26 03:43:56 S 03 03 16.248 +25 43 39.32 – V C57
2021-10-26 03:43:56 s 1 +160315.46 5 +39089.084 3020.0 – C57
2021-10-26 05:23:56 S 03 03 16.150 +25 45 13.10 – V C57
2021-10-26 05:23:56 s 1 +163666.38 1 +48510.765 3270.0 – C57
2021-10-26 05:53:56 S 03 03 16.152 +25 45 44.28 – V C57
2021-10-26 05:53:56 s 1 +164591.07 8 +51314.385 2890.0 – C57
2021-10-26 06:03:56 S 03 03 16.056 +25 45 50.65 – 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)