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
2021-10-29 23:03:56 s 1 +84831.887 0 +349479.47 6390.0 – C57
2021-10-29 23:23:56 S 03 02 31.058 +26 50 03.44 – V C57
2021-10-29 23:23:56 s 1 +84156.699 0 +349931.34 7160.0 – C57
2021-10-29 23:33:56 S 03 02 31.006 +26 50 08.74 – V C57
2021-10-29 23:33:56 s 1 +83818.731 0 +350155.65 1380.0 – C57
2021-10-29 23:34:39 C 03 04 10.42 +26 30 26.7 – Y 557
2021-10-29 23:43:56 S 03 02 30.982 +26 50 16.44 – V C57
2021-10-29 23:43:56 s 1 +83480.515 0 +350378.89 4830.0 – C57
2021-10-30 00:03:56 S 03 02 30.972 +26 50 25.91 – V C57
2021-10-30 00:03:56 s 1 +82803.344 0 +350822.14 9440.0 – C57
2021-10-30 00:13:56 S 03 02 30.749 +26 50 33.25 – V C57
2021-10-30 00:13:56 s 1 +82464.393 0 +351042.15 610.0 – C57
2021-10-30 00:23:56 S 03 02 30.742 +26 50 39.16 – V C57
2021-10-30 00:23:56 s 1 +82125.199 0 +351261.09 1030.0 – C57
2021-10-30 00:30:29 C 03 04 10.81 +26 31 04.1 – Y 557
2021-10-30 00:33:56 S 03 02 30.701 +26 50 44.20 – V C57
2021-10-30 00:33:56 s 1 +81785.764 0 +351478.94 700.0 – C57
2021-10-30 00:43:56 S 03 02 30.571 +26 50 51.97 – V C57
2021-10-30 00:43:56 s 1 +81446.089 0 +351695.73 9630.0 – C57
2021-10-30 00:53:56 S 03 02 30.583 +26 50 56.72 – V C57
2021-10-30 00:53:56 s 1 +81106.176 0 +351911.44 7820.0 – C57
2021-10-30 01:03:56 S 03 02 30.418 +26 51 03.35 – V C57
2021-10-30 01:03:56 s 1 +80766.025 0 +352126.07 5280.0 – C57
2021-10-30 01:13:56 S 03 02 30.422 +26 51 08.86 – V C57
2021-10-30 01:13:56 s 1 +80425.638 0 +352339.64 2010.0 – C57
2021-10-30 01:16:14 C 03 04 11.15 +26 31 34.1 – Y 557
2021-10-30 01:23:56 S 03 02 30.276 +26 51 14.69 – V C57
2021-10-30 01:23:56 s 1 +80085.017 0 +352552.13 8010.0 – C57
2021-10-30 01:33:56 S 03 02 30.233 +26 51 21.85 – V C57
2021-10-30 01:33:56 s 1 +79744.163 0 +352763.54 3300.0 – C57
2021-10-30 01:43:56 S 03 02 30.146 +26 51 26.17 – V C57
2021-10-30 01:43:56 s 1 +79403.076 0 +352973.89 7870.0 – C57
2021-10-30 01:53:56 S 03 02 30.146 +26 51 33.62 – V C57
2021-10-30 01:53:56 s 1 +79061.759 0 +353183.16 1730.0 – C57
2021-10-30 02:03:56 S 03 02 29.942 +26 51 39.02 – V C57
2021-10-30 02:03:56 s 1 +78720.212 0 +353391.36 4880.0 – C57
2021-10-30 02:13:56 S 03 02 29.959 +26 51 44.50 – V C57
2021-10-30 02:13:56 s 1 +78378.437 0 +353598.49 7330.0 – C57
2021-10-30 02:17:13 C 03 04 11.67 +26 32 13.5 – Y 557
2021-10-30 02:23:56 S 03 02 29.851 +26 51 51.70 – V C57
2021-10-30 02:23:56 s 1 +78036.435 0 +353804.55 9080.0 – C57
2021-10-30 02:33:56 S 03 02 29.724 +26 51 57.92 – V C57
2021-10-30 02:33:56 s 1 +77694.207 0 +354009.54 140.0 – C57
2021-10-30 02:43:56 S 03 02 29.681 +26 52 03.07 – V C57
2021-10-30 02:43:56 s 1 +77351.755 0 +354213.47 510.0 – C57
2021-10-30 02:53:56 S 03 02 29.638 +26 52 09.19 – V C57
2021-10-30 02:53:56 s 1 +77009.081 0 +354416.32 200.0 – C57
2021-10-30 03:03:56 S 03 02 29.568 +26 52 15.42 – V C57
2021-10-30 03:03:56 s 1 +76666.184 0 +354618.10 9210.0 – C57
2021-10-30 03:13:56 S 03 02 29.520 +26 52 21.11 – 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)