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
2021-10-31 06:23:56 s 1 +18309.557 0 +373485.41 8050.0 – C57
2021-10-31 06:43:56 S 03 02 21.617 +27 08 20.18 – V C57
2021-10-31 06:43:56 s 1 +17582.042 0 +373542.91 450.0 – C57
2021-10-31 06:53:56 S 03 02 21.679 +27 08 24.61 – V C57
2021-10-31 06:53:56 s 1 +17218.230 0 +373570.12 1590.0 – C57
2021-10-31 06:55:02 C 03 04 41.60 +26 52 19.3 – t V40
2021-10-31 07:03:56 S 03 02 21.540 +27 08 30.80 – V C57
2021-10-31 07:03:56 s 1 +16854.381 0 +373596.28 2700.0 – C57
2021-10-31 07:13:56 S 03 02 21.610 +27 08 36.64 – V C57
2021-10-31 07:13:56 s 1 +16490.498 0 +373621.42 3780.0 – C57
2021-10-31 07:23:56 S 03 02 21.514 +27 08 42.11 – V C57
2021-10-31 07:23:56 s 1 +16126.581 0 +373645.52 4820.0 – C57
2021-10-31 07:33:56 S 03 02 21.468 +27 08 47.51 – V C57
2021-10-31 07:33:56 s 1 +15762.632 0 +373668.58 5850.0 – C57
2021-10-31 07:43:56 S 03 02 21.410 +27 08 52.94 – V C57
2021-10-31 07:43:56 s 1 +15398.650 0 +373690.62 6850.0 – C57
2021-10-31 07:53:56 S 03 02 21.374 +27 08 59.21 – V C57
2021-10-31 07:53:56 s 1 +15034.639 0 +373711.62 7840.0 – C57
2021-10-31 08:03:56 S 03 02 21.377 +27 09 04.82 – V C57
2021-10-31 08:03:56 s 1 +14670.598 0 +373731.58 1190.0 – C57
2021-10-31 08:13:56 S 03 02 21.427 +27 09 09.65 – V C57
2021-10-31 08:13:56 s 1 +14306.528 0 +373750.51 230.0 – C57
2021-10-31 08:23:56 S 03 02 21.377 +27 09 14.51 – V C57
2021-10-31 08:23:56 s 1 +13942.430 0 +373768.41 9270.0 – C57
2021-10-31 08:33:56 S 03 02 21.300 +27 09 21.89 – V C57
2021-10-31 08:33:56 s 1 +13578.307 0 +373785.28 8320.0 – C57
2021-10-31 08:43:56 S 03 02 21.346 +27 09 27.43 – V C57
2021-10-31 08:43:56 s 1 +13214.157 0 +373801.11 7370.0 – C57
2021-10-31 08:53:56 S 03 02 21.286 +27 09 32.18 – V C57
2021-10-31 08:53:56 s 1 +12849.983 0 +373815.91 6410.0 – C57
2021-10-31 09:03:56 S 03 02 21.314 +27 09 38.34 – V C57
2021-10-31 09:03:56 s 1 +12485.786 0 +373829.67 5450.0 – C57
2021-10-31 09:13:56 S 03 02 21.242 +27 09 44.53 – V C57
2021-10-31 09:13:56 s 1 +12121.566 0 +373842.40 4470.0 – C57
2021-10-31 09:23:56 S 03 02 21.235 +27 09 49.61 – V C57
2021-10-31 09:23:56 s 1 +11757.325 0 +373854.10 3480.0 – C57
2021-10-31 09:33:56 S 03 02 21.209 +27 09 54.40 – V C57
2021-10-31 09:33:56 s 1 +11393.063 0 +373864.76 2470.0 – C57
2021-10-31 09:43:56 S 03 02 21.206 +27 09 59.72 – V C57
2021-10-31 09:43:56 s 1 +11028.782 0 +373874.39 1440.0 – C57
2021-10-31 09:53:56 S 03 02 21.149 +27 10 06.85 – V C57
2021-10-31 09:53:56 s 1 +10664.482 0 +373882.99 380.0 – C57
2021-10-31 10:03:56 S 03 02 21.149 +27 10 11.78 – V C57
2021-10-31 10:03:56 s 1 +10300.165 0 +373890.55 9290.0 – C57
2021-10-31 10:13:56 S 03 02 21.122 +27 10 17.36 – V C57
2021-10-31 10:23:56 S 03 02 21.074 +27 10 23.48 – V C57
2021-10-31 10:33:56 S 03 02 21.048 +27 10 28.81 – V C57
2021-10-31 10:43:56 S 03 02 21.012 +27 10 33.92 – V C57
2021-10-31 10:53:56 S 03 02 20.998 +27 10 39.97 – V C57
2021-10-31 11:03:56 S 03 02 21.005 +27 10 46.16 – 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)