4544 Xanthus (1989 FB)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2501386666 ± 9.43e-09
Semi-major axis (a)1.0420242968 AU ± 2.10e-10
Inclination (i)14.14293362° ± 1.06e-06
Long. of Asc. Node (Ω)23.93544276° ± 2.72e-06
Arg. of Perihelion (ω)333.83833488° ± 3.84e-06
Mean Anomaly (M)5.13929800° ± 3.64e-06
Mean Motion (n)0.9266068532°/day ± 2.81e-10
Perihelion dist (q)0.78137373 AU ± 9.82e-09
Aphelion dist (Q)1.30267486 AU ± 9.83e-09
Orbital Period1.06369414 yr ± 3.22e-10
Physical Parameters
H (abs. magnitude)17.39
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.282″
Uncertainty0
Orbit TypeApollo
MOID0.174208 AU
Observations Used2767
Radar Obs Used1
Oppositions1
Arc Total1989-2026
First Observation Used1989-03-30
Last Observation Used2026-02-18
Observations (3156)
Date Type RA Dec Mag Band Observatory
2024-02-24 02:15:02 S 10 39 48.082 +57 53 00.96 V C57
2024-02-24 02:35:02 S 10 39 42.598 +57 52 45.48 V C57
2024-02-24 02:55:02 S 10 39 37.380 +57 52 29.50 V C57
2024-02-24 03:15:02 S 10 39 32.098 +57 52 14.12 V C57
2024-02-24 03:35:02 S 10 39 26.810 +57 51 58.72 V C57
2024-02-24 03:55:02 S 10 39 21.785 +57 51 43.56 V C57
2024-02-24 04:15:02 S 10 39 16.399 +57 51 27.18 V C57
2024-02-24 04:35:02 S 10 39 11.280 +57 51 12.20 V C57
2024-02-24 04:55:02 S 10 39 05.935 +57 50 55.90 V C57
2024-02-24 05:15:02 S 10 39 00.689 +57 50 41.28 V C57
2024-02-24 05:35:02 S 10 38 55.217 +57 50 24.50 V C57
2024-02-24 05:55:02 S 10 38 49.978 +57 50 09.02 V C57
2024-02-24 06:15:02 S 10 38 44.930 +57 49 53.47 V C57
2024-02-24 06:35:02 S 10 38 39.480 +57 49 37.49 V C57
2024-02-24 06:55:02 S 10 38 34.214 +57 49 21.32 V C57
2024-02-24 07:15:02 S 10 38 28.826 +57 49 03.86 V C57
2024-02-24 07:35:02 S 10 38 23.479 +57 48 49.28 V C57
2024-02-24 07:55:02 S 10 38 18.379 +57 48 32.87 V C57
2024-02-24 08:15:02 S 10 38 13.178 +57 48 17.68 V C57
2024-02-24 08:15:02 s 1 -10167.550 0 +218840.52 7690.0 C57
2024-02-24 08:35:02 S 10 38 07.762 +57 48 01.69 V C57
2024-02-24 08:35:02 s 1 -11222.720 0 +217849.92 8560.0 C57
2024-02-24 08:55:02 S 10 38 02.378 +57 47 45.78 V C57
2024-02-24 08:55:02 s 1 -12277.444 0 +216849.96 8680.0 C57
2024-02-24 09:15:02 S 10 37 57.106 +57 47 29.94 V C57
2024-02-24 09:15:02 s 1 -13331.675 0 +215840.65 7650.0 C57
2024-02-24 09:35:02 S 10 37 51.650 +57 47 13.85 V C57
2024-02-24 09:35:02 s 1 -14385.365 0 +214822.00 5020.0 C57
2024-02-24 10:15:02 S 10 37 41.174 +57 46 41.66 V C57
2024-02-24 10:15:02 s 1 -16490.910 0 +212756.37 1810.0 C57
2024-02-24 10:55:02 S 10 37 30.737 +57 46 07.90 V C57
2024-02-24 10:55:02 s 1 -18593.669 0 +210652.91 4530.0 C57
2024-02-24 11:15:02 S 10 37 25.550 +57 45 52.49 V C57
2024-02-24 11:15:02 s 1 -19643.871 0 +209586.89 3960.0 C57
2024-02-24 11:35:02 S 10 37 20.088 +57 45 34.42 V C57
2024-02-24 11:35:02 s 1 -20693.218 0 +208511.36 0.814 C57
2024-02-24 11:55:02 S 10 37 14.906 +57 45 19.76 V C57
2024-02-24 11:55:02 s 1 -21741.649 0 +207426.20 0.609 C57
2024-02-24 12:15:02 S 10 37 09.276 +57 45 04.90 V C57
2024-02-24 12:15:02 s 1 -22789.112 0 +206331.45 0.737 C57
2024-02-24 12:35:02 S 10 37 04.109 +57 44 47.33 V C57
2024-02-24 12:35:02 s 1 -23835.554 0 +205227.09 0.149 C57
2024-02-24 12:55:02 S 10 36 58.608 +57 44 28.97 V C57
2024-02-24 12:55:02 s 1 -24880.908 0 +204113.03 0.743 C57
2024-02-24 13:15:02 S 10 36 53.587 +57 44 14.32 V C57
2024-02-24 13:15:02 s 1 -25925.121 0 +202989.28 0.475 C57
2024-02-24 13:35:02 S 10 36 47.959 +57 43 58.40 V C57
2024-02-24 13:35:02 s 1 -26968.138 0 +201855.85 0.292 C57
2024-02-24 13:55:02 S 10 36 42.782 +57 43 39.76 V C57
2024-02-24 13:55:02 s 1 -28009.888 0 +200712.64 0.09 C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1990-11-19 17:00:00 -11375 1 Hz 2380 -1 -1
1990-11-19.708333 -1137500 100 Hz 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)