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
2021-10-13 07:03:56 S 02 56 00.103 +22 55 08.18 – V C57
2021-10-13 07:03:56 s 1 +154985.14 8 +34843.642 7450.0 – C57
2021-10-13 07:05:19 C 02 55 33.06 +22 47 12.0 – V G96
2021-10-13 07:12:45 C 02 55 33.21 +22 47 15.7 – V G96
2021-10-13 07:23:56 S 02 56 00.166 +22 55 21.00 – V C57
2021-10-13 07:23:56 s 1 +155726.61 6 +36781.201 8720.0 – C57
2021-10-13 07:32:43 C 02 55 33.63 +22 47 25.6 – V 703
2021-10-13 07:33:56 S 02 56 00.446 +22 55 26.83 – V C57
2021-10-13 07:33:56 s 1 +156090.31 4 +37748.330 570.0 – C57
2021-10-13 07:40:17 C 02 55 33.77 +22 47 29.4 – V 703
2021-10-13 07:43:56 S 02 56 00.559 +22 55 35.47 – V C57
2021-10-13 07:43:56 s 1 +156449.37 0 +38714.337 6720.0 – C57
2021-10-13 07:47:52 C 02 55 33.91 +22 47 32.9 – V 703
2021-10-13 07:53:56 S 02 56 00.598 +22 55 39.72 – V C57
2021-10-13 07:53:56 s 1 +156803.82 3 +39679.204 7310.0 – C57
2021-10-13 07:55:27 C 02 55 34.05 +22 47 36.6 – V 703
2021-10-13 08:13:56 S 02 56 00.780 +22 56 01.18 – V C57
2021-10-13 08:13:56 s 1 +157499.06 6 +41605.454 2310.0 – C57
2021-10-13 08:23:56 S 02 56 01.068 +22 56 00.06 – V C57
2021-10-13 08:23:56 s 1 +157839.92 8 +42566.806 6960.0 – C57
2021-10-13 08:33:56 S 02 56 01.210 +22 56 08.12 – V C57
2021-10-13 08:33:56 s 1 +158176.33 4 +43526.954 6540.0 – C57
2021-10-13 08:43:56 S 02 56 01.224 +22 56 14.89 – V C57
2021-10-13 08:43:56 s 1 +158508.31 7 +44485.886 1190.0 – C57
2021-10-13 08:53:56 S 02 56 01.459 +22 56 23.32 – V C57
2021-10-13 08:53:56 s 1 +158835.91 3 +45443.585 1000.0 – C57
2021-10-13 09:03:56 S 02 56 01.637 +22 56 27.35 – V C57
2021-10-13 09:03:56 s 1 +159159.15 7 +46400.040 6110.0 – C57
2021-10-13 09:13:56 S 02 56 01.764 +22 56 35.95 – V C57
2021-10-13 09:13:56 s 1 +159478.08 3 +47355.235 6630.0 – C57
2021-10-13 09:23:56 S 02 56 01.766 +22 56 42.83 – V C57
2021-10-13 09:23:56 s 1 +159792.72 6 +48309.158 2680.0 – C57
2021-10-13 09:33:56 S 02 56 01.949 +22 56 49.34 – V C57
2021-10-13 09:33:56 s 1 +160103.12 0 +49261.796 4370.0 – C57
2021-10-13 09:43:56 S 02 56 02.014 +22 56 58.13 – V C57
2021-10-13 09:43:56 s 1 +160409.29 8 +50213.137 1820.0 – C57
2021-10-13 09:53:56 S 02 56 02.155 +22 57 03.64 – V C57
2021-10-13 09:53:56 s 1 +160711.29 3 +51163.168 5140.0 – C57
2021-10-13 10:03:56 S 02 56 02.290 +22 57 09.83 – V C57
2021-10-13 10:03:56 s 1 +161009.13 8 +52111.877 4440.0 – C57
2021-10-13 10:13:56 S 02 56 02.352 +22 57 16.85 – V C57
2021-10-13 10:13:56 s 1 +161302.86 6 +53059.254 9830.0 – C57
2021-10-13 10:23:56 S 02 56 02.606 +22 57 25.27 – V C57
2021-10-13 10:23:56 s 1 +161592.50 8 +54005.287 1430.0 – C57
2021-10-13 10:33:56 S 02 56 02.479 +22 57 30.20 – V C57
2021-10-13 10:33:56 s 1 +161878.09 8 +54949.965 9340.0 – C57
2021-10-13 10:43:56 S 02 56 02.755 +22 57 37.26 – V C57
2021-10-13 10:43:56 s 1 +162159.66 6 +55893.278 3660.0 – C57
2021-10-13 10:53:56 S 02 56 02.897 +22 57 46.55 – V C57
2021-10-13 10:53:56 s 1 +162437.24 3 +56835.215 4520.0 – 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)