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
2021-10-22 22:23:56 s 1 -173605.47 7 +145220.77 6900.0 – C57
2021-10-22 22:33:56 S 02 59 26.789 +24 40 17.80 – V C57
2021-10-22 22:33:56 s 1 -173620.88 1 +144439.69 3490.0 – C57
2021-10-22 22:43:56 S 02 59 27.199 +24 40 22.30 – V C57
2021-10-22 22:43:56 s 1 -173634.33 8 +143656.98 3210.0 – C57
2021-10-22 22:53:56 S 02 59 27.607 +24 40 27.05 – V C57
2021-10-22 22:53:56 s 1 -173645.83 5 +142872.65 6020.0 – C57
2021-10-22 23:03:56 S 02 59 28.056 +24 40 31.62 – V C57
2021-10-22 23:03:56 s 1 -173655.36 0 +142086.68 1880.0 – C57
2021-10-22 23:13:56 S 02 59 28.421 +24 40 35.22 – V C57
2021-10-22 23:13:56 s 1 -173662.90 0 +141299.08 740.0 – C57
2021-10-22 23:23:56 S 02 59 28.862 +24 40 38.46 – V C57
2021-10-22 23:23:56 s 1 -173668.44 4 +140509.86 2560.0 – C57
2021-10-22 23:33:56 S 02 59 29.251 +24 40 43.90 – V C57
2021-10-22 23:33:56 s 1 -173671.97 9 +139719.00 7300.0 – C57
2021-10-22 23:43:56 S 02 59 29.702 +24 40 48.00 – V C57
2021-10-22 23:43:56 s 1 -173673.49 2 +138926.50 4920.0 – C57
2021-10-22 23:53:56 S 02 59 30.089 +24 40 51.96 – V C57
2021-10-22 23:53:56 s 1 -173672.97 1 +138132.38 5370.0 – C57
2021-10-23 00:03:56 S 02 59 30.605 +24 40 55.56 – V C57
2021-10-23 00:03:56 s 1 -173670.40 3 +137336.61 8610.0 – C57
2021-10-23 00:13:56 S 02 59 31.070 +24 41 00.13 – V C57
2021-10-23 00:13:56 s 1 -173665.77 6 +136539.22 4600.0 – C57
2021-10-23 00:43:56 S 02 59 32.294 +24 41 14.46 – V C57
2021-10-23 00:43:56 s 1 -173639.40 5 +134137.20 8580.0 – C57
2021-10-23 00:53:56 S 02 59 32.844 +24 41 17.20 – V C57
2021-10-23 00:53:56 s 1 -173626.40 8 +133333.25 5100.0 – C57
2021-10-23 01:03:56 S 02 59 33.331 +24 41 22.34 – V C57
2021-10-23 01:03:56 s 1 -173611.28 6 +132527.67 4130.0 – C57
2021-10-23 01:13:56 S 02 59 33.612 +24 41 24.22 – V C57
2021-10-23 01:13:56 s 1 -173594.02 4 +131720.44 5640.0 – C57
2021-10-23 01:23:56 S 02 59 33.970 +24 41 28.75 – V C57
2021-10-23 01:23:56 s 1 -173574.61 0 +130911.58 9570.0 – C57
2021-10-23 01:33:56 S 02 59 34.608 +24 41 32.82 – V C57
2021-10-23 01:33:56 s 1 -173553.02 9 +130101.07 5880.0 – C57
2021-10-23 01:43:56 S 02 59 34.934 +24 41 39.12 – V C57
2021-10-23 01:43:56 s 1 -173529.26 8 +129288.92 4520.0 – C57
2021-10-23 01:53:56 S 02 59 35.311 +24 41 42.40 – V C57
2021-10-23 01:53:56 s 1 -173503.31 3 +128475.13 5450.0 – C57
2021-10-23 02:03:56 S 02 59 35.839 +24 41 48.70 – V C57
2021-10-23 02:03:56 s 1 -173475.14 9 +127659.70 8600.0 – C57
2021-10-23 02:23:56 S 02 59 36.662 +24 41 56.83 – V C57
2021-10-23 02:23:56 s 1 -173412.13 9 +126023.91 1420.0 – C57
2021-10-23 02:33:56 S 02 59 37.207 +24 42 00.97 – V C57
2021-10-23 02:33:56 s 1 -173377.26 4 +125203.55 980.0 – C57
2021-10-23 02:43:56 S 02 59 37.685 +24 42 06.01 – V C57
2021-10-23 02:43:56 s 1 -173340.12 2 +124381.54 2570.0 – C57
2021-10-23 02:53:56 S 02 59 38.146 +24 42 07.34 – V C57
2021-10-23 02:53:56 s 1 -173300.70 0 +123557.90 6150.0 – C57
2021-10-23 03:03:56 S 02 59 38.748 +24 42 13.61 – 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)