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 20:50:21 C 03 02 53.72 +25 42 07.0 – V C40
2021-10-26 20:51:57 C 03 02 53.73 +25 42 08.2 – V C40
2021-10-26 20:53:45 C 03 02 53.76 +25 42 09.2 – V C40
2021-10-26 20:53:56 S 03 03 11.702 +25 58 46.06 – V C57
2021-10-26 20:53:56 s 1 +178706.89 8 +129479.86 340.0 – C57
2021-10-26 20:55:20 C 03 02 53.78 +25 42 10.3 – V C40
2021-10-26 20:56:54 C 03 02 53.80 +25 42 11.4 – V C40
2021-10-26 21:00:02 C 03 02 53.82 +25 42 13.4 – V C40
2021-10-26 21:01:36 C 03 02 53.83 +25 42 14.2 – V C40
2021-10-26 21:03:10 C 03 02 53.85 +25 42 15.4 – V C40
2021-10-26 21:03:56 S 03 03 11.506 +25 58 53.83 – V C57
2021-10-26 21:03:56 s 1 +178744.26 4 +130279.08 9180.0 – C57
2021-10-26 21:04:45 C 03 02 53.86 +25 42 16.4 – V C40
2021-10-26 21:06:20 C 03 02 53.88 +25 42 17.2 – V C40
2021-10-26 21:07:54 C 03 02 53.88 +25 42 18.4 – V C40
2021-10-26 21:09:27 C 03 02 53.89 +25 42 19.3 – V C40
2021-10-26 21:11:01 C 03 02 53.90 +25 42 20.3 – V C40
2021-10-26 21:12:36 C 03 02 53.93 +25 42 21.4 – V C40
2021-10-26 21:13:56 S 03 03 11.422 +25 59 02.33 – V C57
2021-10-26 21:13:56 s 1 +178779.49 9 +131076.75 830.0 – C57
2021-10-26 21:15:45 C 03 02 53.95 +25 42 23.2 – V C40
2021-10-26 21:18:53 C 03 02 53.97 +25 42 25.3 – V C40
2021-10-26 21:20:27 C 03 02 53.99 +25 42 26.1 – V C40
2021-10-26 21:22:01 C 03 02 54.00 +25 42 27.3 – V C40
2021-10-26 21:23:36 C 03 02 54.02 +25 42 28.2 – V C40
2021-10-26 21:23:56 S 03 03 11.282 +25 59 10.75 – V C57
2021-10-26 21:23:56 s 1 +178812.61 6 +131872.86 5340.0 – C57
2021-10-26 21:33:56 S 03 03 11.254 +25 59 19.90 – V C57
2021-10-26 21:33:56 s 1 +178843.62 8 +132667.42 2760.0 – C57
2021-10-26 21:43:56 S 03 03 11.208 +25 59 26.09 – V C57
2021-10-26 21:43:56 s 1 +178872.54 7 +133460.43 3130.0 – C57
2021-10-26 21:53:56 S 03 03 11.033 +25 59 35.88 – V C57
2021-10-26 21:53:56 s 1 +178899.38 7 +134251.88 6500.0 – C57
2021-10-26 22:03:56 S 03 03 11.105 +25 59 43.58 – V C57
2021-10-26 22:03:56 s 1 +178924.16 0 +135041.78 2900.0 – C57
2021-10-26 22:13:56 S 03 03 11.011 +25 59 52.19 – V C57
2021-10-26 22:13:56 s 1 +178946.87 9 +135830.12 2380.0 – C57
2021-10-26 22:23:56 S 03 03 10.942 +26 00 01.44 – V C57
2021-10-26 22:23:56 s 1 +178967.55 5 +136616.92 4980.0 – C57
2021-10-26 22:33:56 S 03 03 10.913 +26 00 08.17 – V C57
2021-10-26 22:33:56 s 1 +178986.20 1 +137402.16 750.0 – C57
2021-10-26 22:43:56 S 03 03 10.805 +26 00 15.37 – V C57
2021-10-26 22:43:56 s 1 +179002.83 0 +138185.85 9720.0 – C57
2021-10-26 22:53:56 S 03 03 10.632 +26 00 24.88 – V C57
2021-10-26 22:53:56 s 1 +179017.45 3 +138967.99 1930.0 – C57
2021-10-26 23:03:56 S 03 03 10.654 +26 00 31.54 – V C57
2021-10-26 23:03:56 s 1 +179030.08 2 +139748.58 7440.0 – C57
2021-10-26 23:13:56 S 03 03 10.555 +26 00 40.90 – V C57
2021-10-26 23:13:56 s 1 +179040.73 0 +140527.62 6270.0 – C57
2021-10-26 23:23:56 S 03 03 10.402 +26 00 47.81 – 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)