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
2021-10-30 19:23:56 s 1 +42181.473 0 +369265.83 4540.0 – C57
2021-10-30 19:24:05 C 03 04 31.48 +26 44 02.2 – V C40
2021-10-30 19:25:40 C 03 04 31.50 +26 44 03.2 – V C40
2021-10-30 19:27:14 C 03 04 31.51 +26 44 04.6 – V C40
2021-10-30 19:28:49 C 03 04 31.53 +26 44 05.6 – V C40
2021-10-30 19:30:24 C 03 04 31.53 +26 44 06.9 – V C40
2021-10-30 19:31:41 C 03 04 32.08 +26 43 59.8 – Y 557
2021-10-30 19:31:58 C 03 04 31.54 +26 44 08.0 – V C40
2021-10-30 19:33:56 S 03 02 24.053 +27 01 56.60 – V C57
2021-10-30 19:33:56 s 1 +41822.501 0 +369363.46 6500.0 – C57
2021-10-30 19:43:56 S 03 02 24.029 +27 02 02.36 – V C57
2021-10-30 19:43:56 s 1 +41463.423 0 +369460.05 8170.0 – C57
2021-10-30 19:53:56 S 03 02 23.918 +27 02 09.24 – V C57
2021-10-30 19:53:56 s 1 +41104.241 0 +369555.60 9570.0 – C57
2021-10-30 20:03:56 S 03 02 23.897 +27 02 14.96 – V C57
2021-10-30 20:03:56 s 1 +40744.953 0 +369650.11 690.0 – C57
2021-10-30 20:13:56 S 03 02 23.878 +27 02 20.40 – V C57
2021-10-30 20:13:56 s 1 +40385.563 0 +369743.59 1540.0 – C57
2021-10-30 20:21:58 C 03 04 31.89 +26 44 44.3 – V C40
2021-10-30 20:23:56 S 03 02 23.743 +27 02 26.38 – V C57
2021-10-30 20:23:56 s 1 +40026.071 0 +369836.02 2130.0 – C57
2021-10-30 20:33:56 S 03 02 23.729 +27 02 32.06 – V C57
2021-10-30 20:33:56 s 1 +39666.478 0 +369927.41 2450.0 – C57
2021-10-30 20:35:44 C 03 04 32.73 +26 44 47.3 – Y 557
2021-10-30 20:43:56 S 03 02 23.717 +27 02 37.72 – V C57
2021-10-30 20:43:56 s 1 +39306.785 0 +370017.77 2520.0 – C57
2021-10-30 20:53:56 S 03 02 23.678 +27 02 43.12 – V C57
2021-10-30 20:53:56 s 1 +38946.993 0 +370107.09 2330.0 – C57
2021-10-30 21:03:56 S 03 02 23.633 +27 02 49.52 – V C57
2021-10-30 21:03:56 s 1 +38587.104 0 +370195.37 1890.0 – C57
2021-10-30 21:13:56 S 03 02 23.575 +27 02 55.18 – V C57
2021-10-30 21:13:56 s 1 +38227.118 0 +370282.61 1200.0 – C57
2021-10-30 21:23:56 S 03 02 23.582 +27 03 00.61 – V C57
2021-10-30 21:23:56 s 1 +37867.036 0 +370368.81 260.0 – C57
2021-10-30 21:33:56 S 03 02 23.486 +27 03 06.34 – V C57
2021-10-30 21:33:56 s 1 +37506.859 0 +370453.97 9090.0 – C57
2021-10-30 21:43:56 S 03 02 23.479 +27 03 12.28 – V C57
2021-10-30 21:43:56 s 1 +37146.589 0 +370538.10 7680.0 – C57
2021-10-30 21:53:56 S 03 02 23.429 +27 03 16.92 – V C57
2021-10-30 21:53:56 s 1 +36786.227 0 +370621.19 6030.0 – C57
2021-10-30 22:03:56 S 03 02 23.496 +27 03 23.00 – V C57
2021-10-30 22:03:56 s 1 +36425.773 0 +370703.24 4160.0 – C57
2021-10-30 22:13:56 S 03 02 23.311 +27 03 29.70 – V C57
2021-10-30 22:13:56 s 1 +36065.229 0 +370784.26 2060.0 – C57
2021-10-30 22:23:56 S 03 02 23.302 +27 03 35.60 – V C57
2021-10-30 22:23:56 s 1 +35704.595 0 +370864.23 9730.0 – C57
2021-10-30 22:32:28 C 03 04 33.63 +26 46 11.8 – Y 557
2021-10-30 22:33:56 S 03 02 23.306 +27 03 40.72 – V C57
2021-10-30 22:33:56 s 1 +35343.873 0 +370943.17 7190.0 – C57
2021-10-30 22:43:56 S 03 02 23.203 +27 03 46.62 – 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)