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 13:53:56 S 03 02 35.503 +26 44 14.68 V C57
2021-10-29 13:53:56 s 1 +102966.40 4 +335347.43 930.0 C57
2021-10-29 14:03:56 S 03 02 35.340 +26 44 20.62 V C57
2021-10-29 14:03:56 s 1 +102644.87 2 +335634.04 6930.0 C57
2021-10-29 14:13:56 S 03 02 35.249 +26 44 27.20 V C57
2021-10-29 14:13:56 s 1 +102323.01 1 +335919.53 1880.0 C57
2021-10-29 14:23:56 S 03 02 35.206 +26 44 33.04 V C57
2021-10-29 14:23:56 s 1 +102000.82 2 +336203.92 5790.0 C57
2021-10-29 14:33:56 S 03 02 35.105 +26 44 39.08 V C57
2021-10-29 14:33:56 s 1 +101678.30 7 +336487.20 8660.0 C57
2021-10-29 14:43:56 S 03 02 35.064 +26 44 44.92 V C57
2021-10-29 14:43:56 s 1 +101355.46 6 +336769.37 490.0 C57
2021-10-29 14:53:56 S 03 02 35.002 +26 44 51.86 V C57
2021-10-29 14:53:56 s 1 +101032.30 2 +337050.44 1300.0 C57
2021-10-29 15:03:56 S 03 02 34.956 +26 44 57.91 V C57
2021-10-29 15:03:56 s 1 +100708.81 5 +337330.40 1080.0 C57
2021-10-29 15:13:56 S 03 02 34.800 +26 45 02.92 V C57
2021-10-29 15:13:56 s 1 +100385.00 9 +337609.25 9840.0 C57
2021-10-29 15:23:56 S 03 02 34.742 +26 45 11.20 V C57
2021-10-29 15:23:56 s 1 +100060.88 3 +337887.00 7590.0 C57
2021-10-29 15:33:56 S 03 02 34.711 +26 45 16.34 V C57
2021-10-29 15:33:56 s 1 +99736.440 0 +338163.65 4340.0 C57
2021-10-29 15:43:56 S 03 02 34.548 +26 45 21.46 V C57
2021-10-29 15:43:56 s 1 +99411.681 0 +338439.19 80.0 C57
2021-10-29 15:53:56 S 03 02 34.538 +26 45 28.94 V C57
2021-10-29 15:53:56 s 1 +99086.608 0 +338713.63 4820.0 C57
2021-10-29 16:03:56 S 03 02 34.471 +26 45 34.74 V C57
2021-10-29 16:03:56 s 1 +98761.222 0 +338986.97 8570.0 C57
2021-10-29 16:13:56 S 03 02 34.356 +26 45 41.51 V C57
2021-10-29 16:13:56 s 1 +98435.525 0 +339259.21 1330.0 C57
2021-10-29 17:13:56 S 03 02 33.756 +26 46 18.23 V C57
2021-10-29 17:13:56 s 1 +96474.887 0 +340869.53 7470.0 C57
2021-10-29 17:23:56 S 03 02 33.840 +26 46 23.30 V C57
2021-10-29 17:23:56 s 1 +96147.052 0 +341134.07 3470.0 C57
2021-10-29 17:33:56 S 03 02 33.686 +26 46 30.22 V C57
2021-10-29 17:33:56 s 1 +95818.918 0 +341397.52 8520.0 C57
2021-10-29 17:43:56 S 03 02 33.655 +26 46 36.08 V C57
2021-10-29 17:43:56 s 1 +95490.485 0 +341659.87 2630.0 C57
2021-10-29 17:52:05 C 03 04 06.84 +26 26 32.4 V C40
2021-10-29 17:53:56 S 03 02 33.535 +26 46 42.06 V C57
2021-10-29 17:53:56 s 1 +95161.757 0 +341921.12 5800.0 C57
2021-10-29 18:03:56 S 03 02 33.422 +26 46 48.11 V C57
2021-10-29 18:03:56 s 1 +94832.733 0 +342181.28 8040.0 C57
2021-10-29 18:11:59 C 03 04 07.06 +26 26 46.7 V C40
2021-10-29 18:19:01 C 03 04 07.14 +26 26 51.7 V C40
2021-10-29 18:20:32 C 03 04 07.15 +26 26 52.8 V C40
2021-10-29 18:23:56 S 03 02 33.307 +26 46 59.81 V C57
2021-10-29 18:23:56 s 1 +94173.806 0 +342698.31 9750.0 C57
2021-10-29 18:28:11 C 03 04 07.23 +26 26 58.3 V C40
2021-10-29 18:29:44 C 03 04 07.26 +26 26 59.5 V C40
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)