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
2021-10-29 03:43:56 s 1 +121891.20 9 +315740.51 7110.0 – C57
2021-10-29 03:53:56 S 03 02 40.512 +26 37 56.89 – V C57
2021-10-29 03:53:56 s 1 +121592.94 5 +316096.08 7930.0 – C57
2021-10-29 03:56:18 C 03 03 48.76 +26 17 11.6 – Y 557
2021-10-29 04:03:56 S 03 02 40.416 +26 38 03.37 – V C57
2021-10-29 04:03:56 s 1 +121294.24 6 +316450.49 7330.0 – C57
2021-10-29 04:23:56 S 03 02 40.262 +26 38 15.43 – V C57
2021-10-29 04:23:56 s 1 +120695.55 0 +317155.86 1940.0 – C57
2021-10-29 04:33:56 S 03 02 40.154 +26 38 22.56 – V C57
2021-10-29 04:33:56 s 1 +120395.55 7 +317506.82 7160.0 – C57
2021-10-29 05:43:56 S 03 02 39.622 +26 39 07.16 – V C57
2021-10-29 05:43:56 s 1 +118283.74 3 +319931.37 5290.0 – C57
2021-10-29 05:53:56 S 03 02 39.530 +26 39 13.86 – V C57
2021-10-29 05:53:56 s 1 +117980.38 2 +320273.15 9620.0 – C57
2021-10-29 06:03:56 S 03 02 39.437 +26 39 18.61 – V C57
2021-10-29 06:03:56 s 1 +117676.61 0 +320613.79 2620.0 – C57
2021-10-29 06:13:56 S 03 02 39.401 +26 39 26.10 – V C57
2021-10-29 06:13:56 s 1 +117372.42 6 +320953.28 4290.0 – C57
2021-10-29 06:23:56 S 03 02 39.262 +26 39 32.22 – V C57
2021-10-29 06:23:56 s 1 +117067.83 4 +321291.63 4630.0 – C57
2021-10-29 06:33:56 S 03 02 39.180 +26 39 38.48 – V C57
2021-10-29 06:33:56 s 1 +116762.83 4 +321628.84 3670.0 – C57
2021-10-29 06:43:56 S 03 02 39.086 +26 39 45.25 – V C57
2021-10-29 06:43:56 s 1 +116457.43 0 +321964.91 1400.0 – C57
2021-10-29 06:53:56 S 03 02 39.010 +26 39 51.26 – V C57
2021-10-29 06:53:56 s 1 +116151.62 2 +322299.84 7820.0 – C57
2021-10-29 07:03:56 S 03 02 38.942 +26 39 57.24 – V C57
2021-10-29 07:03:56 s 1 +115845.41 2 +322633.63 2950.0 – C57
2021-10-29 07:13:56 S 03 02 38.842 +26 40 04.15 – V C57
2021-10-29 07:13:56 s 1 +115538.80 2 +322966.29 6790.0 – C57
2021-10-29 07:23:56 S 03 02 38.746 +26 40 10.92 – V C57
2021-10-29 07:23:56 s 1 +115231.79 5 +323297.80 9350.0 – C57
2021-10-29 07:33:56 S 03 02 38.599 +26 40 16.79 – V C57
2021-10-29 07:33:56 s 1 +114924.39 1 +323628.18 630.0 – C57
2021-10-29 07:43:56 S 03 02 38.501 +26 40 22.76 – V C57
2021-10-29 07:43:56 s 1 +114616.59 2 +323957.42 640.0 – C57
2021-10-29 07:53:56 S 03 02 38.506 +26 40 29.93 – V C57
2021-10-29 07:53:56 s 1 +114308.40 1 +324285.53 9380.0 – C57
2021-10-29 08:03:56 S 03 02 38.340 +26 40 35.18 – V C57
2021-10-29 08:03:56 s 1 +113999.81 9 +324612.50 6870.0 – C57
2021-10-29 08:13:56 S 03 02 38.282 +26 40 42.53 – V C57
2021-10-29 08:13:56 s 1 +113690.84 7 +324938.34 3100.0 – C57
2021-10-29 08:23:56 S 03 02 38.155 +26 40 48.86 – V C57
2021-10-29 08:23:56 s 1 +113381.48 9 +325263.05 8080.0 – C57
2021-10-29 08:33:56 S 03 02 38.138 +26 40 54.88 – V C57
2021-10-29 08:33:56 s 1 +113071.74 4 +325586.62 1830.0 – C57
2021-10-29 08:43:56 S 03 02 38.035 +26 41 00.13 – V C57
2021-10-29 08:43:56 s 1 +112761.61 6 +325909.07 4340.0 – C57
2021-10-29 08:53:56 S 03 02 37.913 +26 41 07.37 – V C57
2021-10-29 08:53:56 s 1 +112451.10 5 +326230.38 5610.0 – 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)