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
2021-10-11 18:50:24 C 02 54 30.32 +22 30 07.5 – V D29
2021-10-11 19:06:57 C 02 54 30.68 +22 30 15.2 – V D29
2021-10-11 19:10:46 C 02 54 30.76 +22 30 16.7 – V D29
2021-10-12 00:48:00 C 02 54 40.36 +22 32 48.7 – V B18
2021-10-12 00:49:08 C 02 54 40.36 +22 32 49.3 – V B18
2021-10-12 00:50:17 C 02 54 40.39 +22 32 49.6 – V B18
2021-10-12 00:51:25 C 02 54 40.43 +22 32 50.3 – V B18
2021-10-12 00:52:32 C 02 54 40.45 +22 32 51.0 – V B18
2021-10-12 00:55:55 C 02 54 40.54 +22 32 52.3 – V B18
2021-10-13 00:41:43 C 02 55 22.05 +22 44 05.2 – V Y90
2021-10-13 00:45:50 C 02 55 22.15 +22 44 07.1 – V Y90
2021-10-13 00:49:58 C 02 55 22.22 +22 44 09.4 – V Y90
2021-10-13 02:53:56 S 02 55 56.316 +22 52 05.16 – V C57
2021-10-13 02:53:56 s 1 +144005.83 9 +10319.854 6940.0 – C57
2021-10-13 03:03:56 S 02 55 56.407 +22 52 13.19 – V C57
2021-10-13 03:03:56 s 1 +144510.33 3 +11308.991 5350.0 – C57
2021-10-13 03:13:56 S 02 55 56.705 +22 52 18.08 – V C57
2021-10-13 03:13:56 s 1 +145009.03 3 +12297.672 4130.0 – C57
2021-10-13 03:23:56 S 02 55 56.717 +22 52 27.59 – V C57
2021-10-13 03:23:56 s 1 +145501.98 8 +13285.865 3440.0 – C57
2021-10-13 03:33:56 S 02 55 56.978 +22 52 34.64 – V C57
2021-10-13 03:33:56 s 1 +145989.24 6 +14273.537 3450.0 – C57
2021-10-13 03:43:56 S 02 55 57.000 +22 52 41.77 – V C57
2021-10-13 03:43:56 s 1 +146470.85 2 +15260.654 4320.0 – C57
2021-10-13 03:53:56 S 02 55 57.252 +22 52 50.27 – V C57
2021-10-13 03:53:56 s 1 +146946.85 4 +16247.186 6210.0 – C57
2021-10-13 04:03:56 S 02 55 57.355 +22 52 55.49 – V C57
2021-10-13 04:03:56 s 1 +147417.29 8 +17233.102 9280.0 – C57
2021-10-13 04:13:56 S 02 55 57.401 +22 53 03.77 – V C57
2021-10-13 04:13:56 s 1 +147882.23 0 +18218.372 3670.0 – C57
2021-10-13 04:23:56 S 02 55 57.782 +22 53 10.75 – V C57
2021-10-13 04:23:56 s 1 +148341.69 5 +19202.967 9550.0 – C57
2021-10-13 04:33:56 S 02 55 58.030 +22 53 17.12 – V C57
2021-10-13 04:33:56 s 1 +148795.73 8 +20186.859 7080.0 – C57
2021-10-13 04:53:56 S 02 55 58.277 +22 53 35.38 – V C57
2021-10-13 04:53:56 s 1 +149687.73 6 +22152.423 7660.0 – C57
2021-10-13 05:03:56 S 02 55 58.306 +22 53 42.72 – V C57
2021-10-13 05:03:56 s 1 +150125.77 9 +23134.043 1020.0 – C57
2021-10-13 05:13:56 S 02 55 58.310 +22 53 49.24 – V C57
2021-10-13 05:13:56 s 1 +150558.57 6 +24114.853 6630.0 – C57
2021-10-13 05:23:56 S 02 55 58.514 +22 53 56.58 – V C57
2021-10-13 05:23:56 s 1 +150986.17 1 +25094.828 4620.0 – C57
2021-10-13 05:43:56 S 02 55 58.896 +22 54 11.74 – V C57
2021-10-13 05:43:56 s 1 +151825.92 2 +27052.179 8370.0 – C57
2021-10-13 06:03:56 S 02 55 59.162 +22 54 25.99 – V C57
2021-10-13 06:03:56 s 1 +152645.36 8 +29005.909 3400.0 – C57
2021-10-13 06:50:31 C 02 55 32.75 +22 47 04.7 – V G96
2021-10-13 06:53:56 S 02 55 59.870 +22 55 01.88 – V C57
2021-10-13 06:53:56 s 1 +154607.30 1 +33873.249 7750.0 – C57
2021-10-13 06:57:55 C 02 55 32.91 +22 47 08.4 – V G96
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)