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 03:13:56 s 1 +76323.067 0 +354818.82 7540.0 – C57
2021-10-30 03:23:56 S 03 02 29.455 +26 52 26.44 – V C57
2021-10-30 03:23:56 s 1 +75979.730 0 +355018.46 5200.0 – C57
2021-10-30 03:33:56 S 03 02 29.386 +26 52 33.46 – V C57
2021-10-30 03:33:56 s 1 +75636.176 0 +355217.04 2190.0 – C57
2021-10-30 03:38:38 C 03 04 12.52 +26 33 05.0 – Y 557
2021-10-30 03:43:56 S 03 02 29.376 +26 52 39.14 – V C57
2021-10-30 03:43:56 s 1 +75292.404 0 +355414.55 8520.0 – C57
2021-10-30 03:53:56 S 03 02 29.263 +26 52 45.05 – V C57
2021-10-30 03:53:56 s 1 +74948.418 0 +355611.00 4190.0 – C57
2021-10-30 04:03:56 S 03 02 29.237 +26 52 50.27 – V C57
2021-10-30 04:03:56 s 1 +74604.217 0 +355806.38 9200.0 – C57
2021-10-30 04:13:56 S 03 02 29.158 +26 52 57.83 – V C57
2021-10-30 04:13:56 s 1 +74259.803 0 +356000.69 3570.0 – C57
2021-10-30 04:21:19 C 03 04 13.06 +26 33 31.7 – Y 557
2021-10-30 04:23:56 S 03 02 29.059 +26 53 03.08 – V C57
2021-10-30 04:23:56 s 1 +73915.177 0 +356193.94 7290.0 – C57
2021-10-30 04:33:56 S 03 02 29.059 +26 53 08.81 – V C57
2021-10-30 04:33:56 s 1 +73570.341 0 +356386.13 370.0 – C57
2021-10-30 04:43:56 S 03 02 28.927 +26 53 15.79 – V C57
2021-10-30 04:43:56 s 1 +73225.295 0 +356577.24 2810.0 – C57
2021-10-30 04:53:56 S 03 02 28.915 +26 53 21.84 – V C57
2021-10-30 04:53:56 s 1 +72880.042 0 +356767.30 4620.0 – C57
2021-10-30 05:03:56 S 03 02 28.819 +26 53 26.88 – V C57
2021-10-30 05:03:56 s 1 +72534.581 0 +356956.29 5810.0 – C57
2021-10-30 05:13:56 S 03 02 28.805 +26 53 32.78 – V C57
2021-10-30 05:13:56 s 1 +72188.916 0 +357144.22 6360.0 – C57
2021-10-30 05:23:56 S 03 02 28.694 +26 53 39.19 – V C57
2021-10-30 05:23:56 s 1 +71843.045 0 +357331.08 6300.0 – C57
2021-10-30 05:33:56 S 03 02 28.704 +26 53 44.77 – V C57
2021-10-30 05:33:56 s 1 +71496.972 0 +357516.88 5620.0 – C57
2021-10-30 05:43:56 S 03 02 28.502 +26 53 50.75 – V C57
2021-10-30 05:43:56 s 1 +71150.697 0 +357701.62 4330.0 – C57
2021-10-30 05:53:56 S 03 02 28.502 +26 53 57.41 – V C57
2021-10-30 05:53:56 s 1 +70804.221 0 +357885.30 2430.0 – C57
2021-10-30 06:03:56 S 03 02 28.416 +26 54 03.53 – V C57
2021-10-30 06:03:56 s 1 +70457.546 0 +358067.91 9930.0 – C57
2021-10-30 06:13:56 S 03 02 28.330 +26 54 07.96 – V C57
2021-10-30 06:13:56 s 1 +70110.673 0 +358249.47 6830.0 – C57
2021-10-30 06:23:56 S 03 02 28.354 +26 54 15.01 – V C57
2021-10-30 06:23:56 s 1 +69763.603 0 +358429.96 3140.0 – C57
2021-10-30 06:28:26 C 03 04 18.34 +26 35 20.2 – V 703
2021-10-30 06:33:56 S 03 02 28.130 +26 54 21.85 – V C57
2021-10-30 06:33:56 s 1 +69416.337 0 +358609.39 8850.0 – C57
2021-10-30 06:36:04 C 03 04 18.37 +26 35 25.5 – V 703
2021-10-30 06:43:42 C 03 04 18.40 +26 35 30.9 – V 703
2021-10-30 06:51:20 C 03 04 18.44 +26 35 36.2 – V 703
2021-10-30 07:03:56 S 03 02 28.111 +26 54 36.76 – V C57
2021-10-30 07:03:56 s 1 +68373.376 0 +359141.33 2500.0 – C57
2021-10-30 07:13:56 S 03 02 28.361 +26 54 38.77 – 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)