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 22:13:56 S 03 02 20.405 +27 16 57.94 – V C57
2021-10-31 22:13:56 s 1 -16273.481 0 +371645.23 140.0 – C57
2021-10-31 22:23:55 S 03 02 20.482 +27 17 02.69 – V C57
2021-10-31 22:23:55 s 1 -16636.266 0 +371576.04 6960.0 – C57
2021-10-31 22:33:56 S 03 02 20.450 +27 17 08.52 – V C57
2021-10-31 22:33:56 s 1 -16998.992 0 +371505.81 3480.0 – C57
2021-10-31 22:43:56 S 03 02 20.486 +27 17 14.21 – V C57
2021-10-31 22:43:56 s 1 -17361.658 0 +371434.53 9700.0 – C57
2021-10-31 22:53:56 S 03 02 20.551 +27 17 18.92 – V C57
2021-10-31 22:53:56 s 1 -17724.262 0 +371362.21 5620.0 – C57
2021-10-31 23:02:13 C 03 04 57.01 +27 03 32.1 – Y 557
2021-10-31 23:03:56 S 03 02 20.527 +27 17 24.61 – V C57
2021-10-31 23:03:56 s 1 -18086.804 0 +371288.84 1220.0 – C57
2021-10-31 23:13:56 S 03 02 20.530 +27 17 30.95 – V C57
2021-10-31 23:13:56 s 1 -18449.283 0 +371214.44 6510.0 – C57
2021-10-31 23:23:56 S 03 02 20.501 +27 17 35.30 – V C57
2021-10-31 23:23:56 s 1 -18811.698 0 +371138.98 1480.0 – C57
2021-10-31 23:33:55 S 03 02 20.515 +27 17 40.63 – V C57
2021-10-31 23:33:55 s 1 -19174.047 0 +371062.49 6130.0 – C57
2021-10-31 23:43:56 S 03 02 20.594 +27 17 47.18 – V C57
2021-10-31 23:43:56 s 1 -19536.330 0 +370984.95 450.0 – C57
2021-10-31 23:53:55 S 03 02 20.554 +27 17 51.97 – V C57
2021-10-31 23:53:55 s 1 -19898.545 0 +370906.36 4450.0 – C57
2021-11-01 00:03:12 C 03 04 57.36 +27 04 15.8 – Y 557
2021-11-01 00:03:56 S 03 02 20.522 +27 17 56.69 – V C57
2021-11-01 00:03:56 s 1 -20260.692 0 +370826.73 8110.0 – C57
2021-11-01 00:13:56 S 03 02 20.522 +27 18 02.48 – V C57
2021-11-01 00:13:56 s 1 -20622.769 0 +370746.06 1430.0 – C57
2021-11-01 00:23:56 S 03 02 20.534 +27 18 08.28 – V C57
2021-11-01 00:23:56 s 1 -20984.776 0 +370664.34 4420.0 – C57
2021-11-01 00:33:56 S 03 02 20.537 +27 18 14.00 – V C57
2021-11-01 00:33:56 s 1 -21346.711 0 +370581.57 7060.0 – C57
2021-11-01 00:43:55 S 03 02 20.592 +27 18 19.44 – V C57
2021-11-01 00:43:55 s 1 -21708.573 0 +370497.76 9350.0 – C57
2021-11-01 00:53:56 S 03 02 20.642 +27 18 23.80 – V C57
2021-11-01 00:53:56 s 1 -22070.361 0 +370412.90 1300.0 – C57
2021-11-01 01:01:11 C 03 04 57.71 +27 04 56.5 – Y 557
2021-11-01 01:03:55 S 03 02 20.662 +27 18 31.00 – V C57
2021-11-01 01:03:55 s 1 -22432.074 0 +370326.99 2880.0 – C57
2021-11-01 01:13:56 S 03 02 20.681 +27 18 36.50 – V C57
2021-11-01 01:13:56 s 1 -22793.712 0 +370240.04 4110.0 – C57
2021-11-01 01:23:55 S 03 02 20.657 +27 18 41.04 – V C57
2021-11-01 01:23:55 s 1 -23155.273 0 +370152.04 4980.0 – C57
2021-11-01 01:33:56 S 03 02 20.659 +27 18 46.76 – V C57
2021-11-01 01:33:56 s 1 -23516.755 0 +370063.00 5480.0 – C57
2021-11-01 01:43:56 S 03 02 20.698 +27 18 52.56 – V C57
2021-11-01 01:43:56 s 1 -23878.159 0 +369972.90 5610.0 – C57
2021-11-01 01:53:56 S 03 02 20.705 +27 18 58.68 – V C57
2021-11-01 01:53:56 s 1 -24239.482 0 +369881.76 5360.0 – C57
2021-11-01 02:03:56 S 03 02 20.676 +27 19 03.11 – 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)