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 09:33:55 s 1 -159854.83 9 +78608.370 4870.0 C57
2021-11-05 09:43:55 S 03 04 45.919 +28 15 35.14 V C57
2021-11-05 09:43:55 s 1 -159662.55 0 +77675.329 4820.0 C57
2021-11-05 09:53:55 S 03 04 46.673 +28 15 41.47 V C57
2021-11-05 09:53:55 s 1 -159466.73 9 +76740.573 1970.0 C57
2021-11-05 10:03:55 S 03 04 47.275 +28 15 48.78 V C57
2021-11-05 10:03:55 s 1 -159267.37 7 +75804.109 6210.0 C57
2021-11-05 10:13:55 S 03 04 47.962 +28 15 55.87 V C57
2021-11-05 10:13:55 s 1 -159064.43 7 +74865.941 7430.0 C57
2021-11-05 10:23:55 S 03 04 48.636 +28 16 02.21 V C57
2021-11-05 10:23:55 s 1 -158857.88 8 +73926.074 5540.0 C57
2021-11-05 10:33:55 S 03 04 49.313 +28 16 08.62 V C57
2021-11-05 10:33:55 s 1 -158647.70 2 +72984.514 420.0 C57
2021-11-05 10:43:55 S 03 04 49.949 +28 16 15.17 V C57
2021-11-05 10:43:55 s 1 -158433.84 8 +72041.266 1970.0 C57
2021-11-05 10:53:55 S 03 04 50.647 +28 16 22.44 V C57
2021-11-05 10:53:55 s 1 -158216.29 7 +71096.336 90.0 C57
2021-11-05 11:03:55 S 03 04 51.326 +28 16 30.07 V C57
2021-11-05 11:03:55 s 1 -157995.01 7 +70149.730 4660.0 C57
2021-11-05 11:13:55 S 03 04 52.001 +28 16 36.62 V C57
2021-11-05 11:13:55 s 1 -157769.97 8 +69201.454 5570.0 C57
2021-11-05 11:23:55 S 03 04 52.680 +28 16 42.46 V C57
2021-11-05 11:23:55 s 1 -157541.15 0 +68251.515 2720.0 C57
2021-11-05 11:33:55 S 03 04 53.381 +28 16 49.84 V C57
2021-11-05 11:33:55 s 1 -157308.50 0 +67299.919 5990.0 C57
2021-11-05 11:40:35 C 03 06 37.28 +28 28 11.6 t V40
2021-11-05 11:43:55 S 03 04 54.067 +28 16 56.17 V C57
2021-11-05 11:43:55 s 1 -157071.99 6 +66346.674 5270.0 C57
2021-11-05 11:53:55 S 03 04 54.761 +28 17 04.31 V C57
2021-11-05 11:53:55 s 1 -156831.60 7 +65391.786 450.0 C57
2021-11-05 12:03:55 S 03 04 55.447 +28 17 10.93 V C57
2021-11-05 12:03:55 s 1 -156587.30 1 +64435.264 1400.0 C57
2021-11-05 12:13:55 S 03 04 56.150 +28 17 17.66 V C57
2021-11-05 12:13:55 s 1 -156339.04 3 +63477.115 8010.0 C57
2021-11-05 12:23:55 S 03 04 56.882 +28 17 24.11 V C57
2021-11-05 12:23:55 s 1 -156086.80 1 +62517.347 170.0 C57
2021-11-05 12:33:55 S 03 04 57.552 +28 17 30.80 V C57
2021-11-05 12:33:55 s 1 -155830.54 2 +61555.968 7750.0 C57
2021-11-05 12:43:55 S 03 04 58.250 +28 17 38.65 V C57
2021-11-05 12:43:55 s 1 -155570.23 1 +60592.988 630.0 C57
2021-11-05 12:53:55 S 03 04 58.982 +28 17 45.74 V C57
2021-11-05 12:53:55 s 1 -155305.83 4 +59628.415 8690.0 C57
2021-11-05 13:03:55 S 03 04 59.678 +28 17 52.37 V C57
2021-11-05 13:03:55 s 1 -155037.31 7 +58662.258 1810.0 C57
2021-11-05 13:13:55 S 03 05 00.391 +28 17 58.70 V C57
2021-11-05 13:13:55 s 1 -154764.64 3 +57694.527 9860.0 C57
2021-11-05 13:23:55 S 03 05 01.159 +28 18 06.12 V C57
2021-11-05 13:23:55 s 1 -154487.77 9 +56725.232 2720.0 C57
2021-11-05 13:33:55 S 03 05 01.838 +28 18 14.36 V C57
2021-11-05 13:33:55 s 1 -154206.68 7 +55754.384 250.0 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)