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
2021-11-03 09:53:55 S 03 02 53.342 +27 48 39.13 V C57
2021-11-03 09:53:55 s 1 -133063.08 7 +276703.21 3420.0 C57
2021-11-03 10:03:55 S 03 02 53.458 +27 48 44.93 V C57
2021-11-03 10:03:55 s 1 -133318.91 9 +276224.59 3710.0 C57
2021-11-03 10:13:55 S 03 02 53.753 +27 48 49.57 V C57
2021-11-03 10:13:55 s 1 -133574.10 1 +275744.64 1570.0 C57
2021-11-03 10:23:55 S 03 02 53.986 +27 48 54.32 V C57
2021-11-03 10:23:55 s 1 -133828.63 1 +275263.38 6970.0 C57
2021-11-03 10:33:55 S 03 02 54.262 +27 48 58.50 V C57
2021-11-03 10:33:55 s 1 -134082.50 5 +274780.78 9910.0 C57
2021-11-03 10:43:55 S 03 02 54.343 +27 49 05.05 V C57
2021-11-03 10:43:55 s 1 -134335.72 1 +274296.86 380.0 C57
2021-11-03 10:53:55 S 03 02 54.756 +27 49 08.58 V C57
2021-11-03 10:53:55 s 1 -134588.27 4 +273811.61 8360.0 C57
2021-11-03 11:03:55 S 03 02 54.720 +27 49 14.12 V C57
2021-11-03 11:03:55 s 1 -134840.16 2 +273325.02 3840.0 C57
2021-11-03 11:03:56 C 03 05 53.45 +27 49 01.7 V T08
2021-11-03 11:10:04 C 03 05 53.44 +27 49 06.5 V T08
2021-11-03 11:13:55 S 03 02 55.075 +27 49 20.82 V C57
2021-11-03 11:13:55 s 1 -135091.38 2 +272837.11 6810.0 C57
2021-11-03 11:23:35 C 03 05 53.44 +27 49 16.9 V T08
2021-11-03 11:23:55 S 03 02 55.164 +27 49 24.92 V C57
2021-11-03 11:23:55 s 1 -135341.93 1 +272347.86 7270.0 C57
2021-11-03 11:33:55 S 03 02 55.258 +27 49 31.66 V C57
2021-11-03 11:33:55 s 1 -135591.80 5 +271857.27 5180.0 C57
2021-11-03 11:40:35 C 03 05 53.44 +27 49 29.9 V T08
2021-11-03 11:43:55 S 03 02 55.668 +27 49 37.88 V C57
2021-11-03 11:43:55 s 1 -135841.00 1 +271365.35 560.0 C57
2021-11-03 11:53:55 S 03 02 55.889 +27 49 42.67 V C57
2021-11-03 11:53:55 s 1 -136089.51 6 +270872.09 3380.0 C57
2021-11-03 12:03:55 S 03 02 56.064 +27 49 47.82 V C57
2021-11-03 12:03:55 s 1 -136337.34 7 +270377.49 3630.0 C57
2021-11-03 12:13:55 S 03 02 56.275 +27 49 52.14 V C57
2021-11-03 12:13:55 s 1 -136584.49 0 +269881.55 1300.0 C57
2021-11-03 12:23:55 S 03 02 56.575 +27 49 58.08 V C57
2021-11-03 12:23:55 s 1 -136830.94 2 +269384.26 6380.0 C57
2021-11-03 12:33:55 S 03 02 56.738 +27 50 03.41 V C57
2021-11-03 12:33:55 s 1 -137076.70 0 +268885.63 8860.0 C57
2021-11-03 12:43:55 S 03 02 56.995 +27 50 07.44 V C57
2021-11-03 12:43:55 s 1 -137321.76 1 +268385.65 8720.0 C57
2021-11-03 12:53:55 S 03 02 57.252 +27 50 13.20 V C57
2021-11-03 12:53:55 s 1 -137566.12 1 +267884.32 5950.0 C57
2021-11-03 13:03:55 S 03 02 57.482 +27 50 17.88 V C57
2021-11-03 13:03:55 s 1 -137809.77 7 +267381.64 540.0 C57
2021-11-03 13:13:55 S 03 02 57.634 +27 50 24.18 V C57
2021-11-03 13:13:55 s 1 -138052.72 5 +266877.61 2480.0 C57
2021-11-03 13:23:55 S 03 02 57.876 +27 50 29.36 V C57
2021-11-03 13:23:55 s 1 -138294.96 3 +266372.22 1760.0 C57
2021-11-03 13:33:55 S 03 02 58.114 +27 50 33.72 V C57
2021-11-03 13:33:55 s 1 -138536.48 6 +265865.49 8350.0 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)