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
2021-11-05 01:43:55 s 1 -165382.71 8 +120477.08 3970.0 C57
2021-11-05 01:53:55 S 03 04 17.813 +28 10 37.38 V C57
2021-11-05 01:53:55 s 1 -165328.66 8 +119627.19 8300.0 C57
2021-11-05 02:03:55 S 03 04 18.377 +28 10 44.26 V C57
2021-11-05 02:03:55 s 1 -165272.15 0 +118775.51 3590.0 C57
2021-11-05 02:13:55 S 03 04 18.878 +28 10 50.20 V C57
2021-11-05 02:13:55 s 1 -165213.14 6 +117922.06 9780.0 C57
2021-11-05 02:23:55 S 03 04 19.442 +28 10 55.38 V C57
2021-11-05 02:23:55 s 1 -165151.63 8 +117066.82 6820.0 C57
2021-11-05 02:33:55 S 03 04 20.014 +28 11 01.61 V C57
2021-11-05 02:33:55 s 1 -165087.61 0 +116209.79 4630.0 C57
2021-11-05 02:43:55 S 03 04 20.539 +28 11 07.26 V C57
2021-11-05 02:43:55 s 1 -165021.04 2 +115350.98 3150.0 C57
2021-11-05 02:53:55 S 03 04 21.094 +28 11 14.64 V C57
2021-11-05 02:53:55 s 1 -164951.91 7 +114490.38 2320.0 C57
2021-11-05 03:03:55 S 03 04 21.641 +28 11 20.58 V C57
2021-11-05 03:03:55 s 1 -164880.21 5 +113628.00 2070.0 C57
2021-11-05 03:13:55 S 03 04 22.207 +28 11 26.70 V C57
2021-11-05 03:13:55 s 1 -164805.91 8 +112763.84 2320.0 C57
2021-11-05 03:23:55 S 03 04 22.807 +28 11 32.17 V C57
2021-11-05 03:23:55 s 1 -164729.00 8 +111897.88 3020.0 C57
2021-11-05 03:33:55 S 03 04 23.381 +28 11 37.75 V C57
2021-11-05 03:33:55 s 1 -164649.46 6 +111030.14 4090.0 C57
2021-11-05 03:43:55 S 03 04 23.954 +28 11 44.95 V C57
2021-11-05 03:43:55 s 1 -164567.27 1 +110160.62 5470.0 C57
2021-11-05 03:53:55 S 03 04 24.499 +28 11 51.72 V C57
2021-11-05 03:53:55 s 1 -164482.40 5 +109289.30 7090.0 C57
2021-11-05 04:03:55 S 03 04 25.073 +28 11 57.88 V C57
2021-11-05 04:03:55 s 1 -164394.84 8 +108416.21 8870.0 C57
2021-11-05 04:13:55 S 03 04 25.658 +28 12 03.17 V C57
2021-11-05 04:13:55 s 1 -164304.58 0 +107541.32 740.0 C57
2021-11-05 04:23:55 S 03 04 26.242 +28 12 09.07 V C57
2021-11-05 04:23:55 s 1 -164211.58 2 +106664.65 2640.0 C57
2021-11-05 04:33:55 S 03 04 26.832 +28 12 15.80 V C57
2021-11-05 04:33:55 s 1 -164115.83 3 +105786.20 4490.0 C57
2021-11-05 04:43:55 S 03 04 27.382 +28 12 22.54 V C57
2021-11-05 04:43:55 s 1 -164017.31 2 +104905.96 6210.0 C57
2021-11-05 04:53:55 S 03 04 27.972 +28 12 29.12 V C57
2021-11-05 04:53:55 s 1 -163915.99 9 +104023.93 7740.0 C57
2021-11-05 05:03:55 S 03 04 28.546 +28 12 34.67 V C57
2021-11-05 05:03:55 s 1 -163811.87 4 +103140.13 9000.0 C57
2021-11-05 05:13:55 S 03 04 29.162 +28 12 40.54 V C57
2021-11-05 05:13:55 s 1 -163704.91 4 +102254.54 9910.0 C57
2021-11-05 05:23:55 S 03 04 29.724 +28 12 46.73 V C57
2021-11-05 05:23:55 s 1 -163595.10 0 +101367.17 390.0 C57
2021-11-05 05:33:55 S 03 04 30.358 +28 12 53.32 V C57
2021-11-05 05:33:55 s 1 -163482.40 8 +100478.01 370.0 C57
2021-11-05 05:43:55 S 03 04 30.888 +28 13 00.84 V C57
2021-11-05 05:43:55 s 1 -163366.81 9 +99587.085 9780.0 C57
2021-11-05 05:53:55 S 03 04 31.524 +28 13 06.35 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)