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
2024-02-21 21:55:02 s 1 +155346.21 8 +274897.41 3870.0 C57
2024-02-21 22:15:02 S 10 53 01.063 +58 28 25.93 V C57
2024-02-21 22:15:02 s 1 +154592.71 7 +275112.37 6860.0 C57
2024-02-21 22:35:02 S 10 52 56.400 +58 28 14.56 V C57
2024-02-21 22:35:02 s 1 +153836.45 4 +275322.39 2750.0 C57
2024-02-21 22:55:02 S 10 52 51.019 +58 28 02.53 V C57
2024-02-21 22:55:02 s 1 +153077.41 5 +275527.42 1590.0 C57
2024-02-21 23:15:02 S 10 52 46.423 +58 27 51.77 V C57
2024-02-21 23:15:02 s 1 +152315.61 9 +275727.47 3550.0 C57
2024-02-21 23:35:02 S 10 52 41.434 +58 27 38.81 V C57
2024-02-21 23:35:02 s 1 +151551.07 8 +275922.52 8770.0 C57
2024-02-21 23:55:02 S 10 52 36.276 +58 27 26.50 V C57
2024-02-21 23:55:02 s 1 +150783.78 0 +276112.54 7330.0 C57
2024-02-22 00:15:02 S 10 52 31.531 +58 27 14.76 V C57
2024-02-22 00:15:02 s 1 +150013.74 3 +276297.51 9390.0 C57
2024-02-22 00:35:02 S 10 52 26.530 +58 27 00.58 V C57
2024-02-22 00:35:02 s 1 +149240.98 1 +276477.45 5090.0 C57
2024-02-22 00:55:02 S 10 52 21.562 +58 26 50.24 V C57
2024-02-22 00:55:02 s 1 +148465.47 9 +276652.29 4510.0 C57
2024-02-22 01:15:02 S 10 52 16.848 +58 26 39.26 V C57
2024-02-22 01:15:02 s 1 +147687.25 8 +276822.04 7800.0 C57
2024-02-22 01:35:02 S 10 52 11.472 +58 26 24.94 V C57
2024-02-22 01:35:02 s 1 +146906.33 0 +276986.70 5130.0 C57
2024-02-22 01:55:02 S 10 52 06.744 +58 26 13.60 V C57
2024-02-22 01:55:02 s 1 +146122.68 3 +277146.21 6570.0 C57
2024-02-22 02:15:02 S 10 52 01.666 +58 26 01.64 V C57
2024-02-22 02:15:02 s 1 +145336.33 4 +277300.58 2280.0 C57
2024-02-22 02:35:02 S 10 51 56.854 +58 25 50.27 V C57
2024-02-22 02:35:02 s 1 +144547.30 0 +277449.81 2400.0 C57
2024-02-22 02:55:02 S 10 51 51.751 +58 25 37.81 V C57
2024-02-22 02:55:02 s 1 +143755.56 5 +277593.83 7040.0 C57
2024-02-22 03:15:02 S 10 51 46.788 +58 25 25.10 V C57
2024-02-22 03:15:02 s 1 +142961.14 9 +277732.66 6350.0 C57
2024-02-22 03:35:02 S 10 51 41.866 +58 25 13.58 V C57
2024-02-22 03:35:02 s 1 +142164.06 6 +277866.29 470.0 C57
2024-02-22 03:55:02 S 10 51 36.972 +58 25 01.81 V C57
2024-02-22 03:55:02 s 1 +141364.30 4 +277994.67 9520.0 C57
2024-02-22 04:15:02 S 10 51 32.004 +58 24 47.16 V C57
2024-02-22 04:15:02 s 1 +140561.88 0 +278117.79 3630.0 C57
2024-02-22 04:35:02 S 10 51 26.993 +58 24 36.65 V C57
2024-02-22 04:35:02 s 1 +139756.81 1 +278235.67 2980.0 C57
2024-02-22 04:55:02 S 10 51 21.953 +58 24 23.26 V C57
2024-02-22 04:55:02 s 1 +138949.08 2 +278348.23 7650.0 C57
2024-02-22 05:15:02 S 10 51 16.884 +58 24 12.35 V C57
2024-02-22 05:15:02 s 1 +138138.71 3 +278455.49 7810.0 C57
2024-02-22 05:35:02 S 10 51 12.043 +58 23 59.68 V C57
2024-02-22 05:35:02 s 1 +137325.71 9 +278557.44 3610.0 C57
2024-02-22 05:55:02 S 10 51 07.226 +58 23 47.47 V C57
2024-02-22 05:55:02 s 1 +136510.08 7 +278654.03 5160.0 C57
2024-02-22 06:15:02 S 10 51 02.146 +58 23 34.73 V 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)