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 19:04:23 C 03 04 55.10 +27 00 33.4 – Y 557
2021-10-31 19:13:56 S 03 02 20.477 +27 15 18.22 – V C57
2021-10-31 19:23:55 S 03 02 20.518 +27 15 24.52 – V C57
2021-10-31 19:23:55 s 1 -10098.088 0 +372662.10 1920.0 – C57
2021-10-31 19:33:56 S 03 02 20.441 +27 15 29.56 – V C57
2021-10-31 19:33:56 s 1 -10461.720 0 +372610.61 3270.0 – C57
2021-10-31 19:53:56 S 03 02 20.388 +27 15 41.08 – V C57
2021-10-31 19:53:56 s 1 -11188.859 0 +372504.51 5260.0 – C57
2021-10-31 20:02:19 C 03 04 55.72 +27 01 17.9 – Y 557
2021-10-31 20:03:56 S 03 02 20.443 +27 15 46.19 – V C57
2021-10-31 20:03:56 s 1 -11552.363 0 +372449.90 5880.0 – C57
2021-10-31 20:12:47 C 03 04 55.08 +27 01 33.2 – V C40
2021-10-31 20:13:56 S 03 02 20.414 +27 15 50.80 – V C57
2021-10-31 20:13:56 s 1 -11915.823 0 +372394.25 6260.0 – C57
2021-10-31 20:15:57 C 03 04 55.10 +27 01 35.5 – V C40
2021-10-31 20:20:40 C 03 04 55.13 +27 01 39.1 – V C40
2021-10-31 20:23:56 S 03 02 20.436 +27 15 56.27 – V C57
2021-10-31 20:23:56 s 1 -12279.237 0 +372337.56 6390.0 – C57
2021-10-31 20:33:55 S 03 02 20.465 +27 16 03.25 – V C57
2021-10-31 20:33:55 s 1 -12642.605 0 +372279.83 6260.0 – C57
2021-10-31 20:40:26 C 03 04 55.24 +27 01 53.8 – V C40
2021-10-31 20:42:01 C 03 04 55.25 +27 01 54.9 – V C40
2021-10-31 20:43:56 S 03 02 20.479 +27 16 08.29 – V C57
2021-10-31 20:43:56 s 1 -13005.924 0 +372221.05 5880.0 – C57
2021-10-31 20:45:10 C 03 04 55.27 +27 01 57.2 – V C40
2021-10-31 20:46:44 C 03 04 55.27 +27 01 58.4 – V C40
2021-10-31 20:49:52 C 03 04 55.29 +27 02 00.8 – V C40
2021-10-31 20:51:26 C 03 04 55.29 +27 02 01.9 – V C40
2021-10-31 20:53:00 C 03 04 55.31 +27 02 03.1 – V C40
2021-10-31 20:53:55 S 03 02 20.510 +27 16 12.90 – V C57
2021-10-31 20:53:55 s 1 -13369.195 0 +372161.24 5230.0 – C57
2021-10-31 20:54:35 C 03 04 55.31 +27 02 04.2 – V C40
2021-10-31 20:56:10 C 03 04 55.32 +27 02 05.2 – V C40
2021-10-31 21:00:52 C 03 04 55.35 +27 02 08.7 – V C40
2021-10-31 21:03:17 C 03 04 56.24 +27 02 04.2 – Y 557
2021-10-31 21:03:56 S 03 02 20.508 +27 16 18.37 – V C57
2021-10-31 21:03:56 s 1 -13732.416 0 +372100.38 4310.0 – C57
2021-10-31 21:04:52 C 03 04 55.37 +27 02 11.7 – V C40
2021-10-31 21:13:56 S 03 02 20.479 +27 16 25.82 – V C57
2021-10-31 21:13:56 s 1 -14095.586 0 +372038.49 3130.0 – C57
2021-10-31 21:15:52 C 03 04 55.43 +27 02 19.7 – V C40
2021-10-31 21:23:56 S 03 02 20.498 +27 16 30.29 – V C57
2021-10-31 21:23:56 s 1 -14458.704 0 +371975.55 1670.0 – C57
2021-10-31 21:33:56 S 03 02 20.506 +27 16 34.97 – V C57
2021-10-31 21:33:56 s 1 -14821.769 0 +371911.57 9930.0 – C57
2021-10-31 21:43:56 S 03 02 20.544 +27 16 41.34 – V C57
2021-10-31 21:43:56 s 1 -15184.781 0 +371846.55 7910.0 – C57
2021-10-31 21:53:56 S 03 02 20.489 +27 16 47.32 – V C57
2021-10-31 21:53:56 s 1 -15547.737 0 +371780.49 5610.0 – C57
2021-10-31 22:04:16 C 03 04 56.67 +27 02 49.7 – Y 557
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)