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
2021-11-01 06:03:56 S 03 02 21.072 +27 21 12.56 – V C57
2021-11-01 06:03:56 s 1 -33243.399 0 +367261.91 6590.0 – C57
2021-11-01 06:13:56 S 03 02 21.127 +27 21 19.58 – V C57
2021-11-01 06:13:56 s 1 -33602.263 0 +367143.43 5280.0 – C57
2021-11-01 06:23:55 S 03 02 21.154 +27 21 25.81 – V C57
2021-11-01 06:23:55 s 1 -33961.017 0 +367023.89 3500.0 – C57
2021-11-01 06:33:56 S 03 02 21.192 +27 21 29.84 – V C57
2021-11-01 06:33:56 s 1 -34319.662 0 +366903.30 1230.0 – C57
2021-11-01 06:43:55 S 03 02 21.178 +27 21 34.45 – V C57
2021-11-01 06:43:55 s 1 -34678.195 0 +366781.65 8480.0 – C57
2021-11-01 06:53:56 S 03 02 21.240 +27 21 40.72 – V C57
2021-11-01 06:53:56 s 1 -35036.616 0 +366658.94 5240.0 – C57
2021-11-01 07:03:55 S 03 02 21.245 +27 21 47.05 – V C57
2021-11-01 07:03:55 s 1 -35394.923 0 +366535.18 1510.0 – C57
2021-11-01 07:13:56 S 03 02 21.300 +27 21 51.73 – V C57
2021-11-01 07:13:56 s 1 -35753.115 0 +366410.36 7280.0 – C57
2021-11-01 07:23:55 S 03 02 21.281 +27 21 56.56 – V C57
2021-11-01 07:23:55 s 1 -36111.191 0 +366284.48 2550.0 – C57
2021-11-01 07:33:56 S 03 02 21.290 +27 22 02.53 – V C57
2021-11-01 07:33:56 s 1 -36469.151 0 +366157.54 7310.0 – C57
2021-11-01 07:43:56 S 03 02 21.362 +27 22 08.47 – V C57
2021-11-01 07:43:56 s 1 -36826.993 0 +366029.55 1560.0 – C57
2021-11-01 07:53:55 S 03 02 21.358 +27 22 12.90 – V C57
2021-11-01 07:53:55 s 1 -37184.715 0 +365900.49 5300.0 – C57
2021-11-01 08:03:56 S 03 02 21.355 +27 22 17.58 – V C57
2021-11-01 08:03:56 s 1 -37542.317 0 +365770.38 8530.0 – C57
2021-11-01 08:13:55 S 03 02 21.403 +27 22 24.13 – V C57
2021-11-01 08:13:55 s 1 -37899.798 0 +365639.20 1230.0 – C57
2021-11-01 08:23:56 S 03 02 21.406 +27 22 30.40 – V C57
2021-11-01 08:23:56 s 1 -38257.156 0 +365506.97 3410.0 – C57
2021-11-01 08:43:56 S 03 02 21.578 +27 22 39.86 – V C57
2021-11-01 08:43:56 s 1 -38971.501 0 +365239.32 6170.0 – C57
2021-11-01 08:53:55 S 03 02 21.576 +27 22 46.49 – V C57
2021-11-01 08:53:55 s 1 -39328.485 0 +365103.91 6750.0 – C57
2021-11-01 09:03:56 S 03 02 21.590 +27 22 51.53 – V C57
2021-11-01 09:03:56 s 1 -39685.343 0 +364967.43 6790.0 – C57
2021-11-01 09:13:56 S 03 02 21.583 +27 22 57.07 – V C57
2021-11-01 09:13:56 s 1 -40042.072 0 +364829.89 6280.0 – C57
2021-11-01 09:23:55 S 03 02 21.631 +27 23 01.82 – V C57
2021-11-01 09:23:55 s 1 -40398.672 0 +364691.29 5220.0 – C57
2021-11-01 09:33:56 S 03 02 21.612 +27 23 07.44 – V C57
2021-11-01 09:33:56 s 1 -40755.142 0 +364551.63 3610.0 – C57
2021-11-01 09:43:55 S 03 02 21.679 +27 23 13.56 – V C57
2021-11-01 09:43:55 s 1 -41111.480 0 +364410.90 1450.0 – C57
2021-11-01 09:53:56 S 03 02 21.677 +27 23 18.17 – V C57
2021-11-01 09:53:56 s 1 -41467.686 0 +364269.11 8720.0 – C57
2021-11-01 10:03:55 S 03 02 21.713 +27 23 23.06 – V C57
2021-11-01 10:03:55 s 1 -41823.758 0 +364126.25 5430.0 – C57
2021-11-01 10:13:56 S 03 02 21.770 +27 23 28.75 – V C57
2021-11-01 10:13:56 s 1 -42179.695 0 +363982.34 1560.0 – 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)