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
2024-02-22 06:15:02 s 1 +135691.83 6 +278745.26 2620.0 C57
2024-02-22 06:35:02 S 10 50 57.070 +58 23 22.09 V C57
2024-02-22 06:35:02 s 1 +134870.98 1 +278831.13 6140.0 C57
2024-02-22 06:55:02 S 10 50 52.274 +58 23 10.36 V C57
2024-02-22 06:55:02 s 1 +134047.51 1 +278911.57 5840.0 C57
2024-02-22 07:15:02 S 10 50 47.203 +58 22 58.22 V C57
2024-02-22 07:15:02 s 1 +133221.44 3 +278986.60 1880.0 C57
2024-02-22 07:35:02 S 10 50 42.125 +58 22 43.72 V C57
2024-02-22 07:35:02 s 1 +132392.79 3 +279056.20 4420.0 C57
2024-02-22 07:55:02 S 10 50 37.246 +58 22 32.23 V C57
2024-02-22 07:55:02 s 1 +131561.55 0 +279120.33 3570.0 C57
2024-02-22 08:15:02 S 10 50 32.314 +58 22 21.76 V C57
2024-02-22 08:15:02 s 1 +130727.73 2 +279178.99 9500.0 C57
2024-02-22 08:35:02 S 10 50 27.386 +58 22 07.28 V C57
2024-02-22 08:35:02 s 1 +129891.35 5 +279232.17 2370.0 C57
2024-02-22 08:55:02 S 10 50 22.310 +58 21 54.50 V C57
2024-02-22 08:55:02 s 1 +129052.40 7 +279279.82 2300.0 C57
2024-02-22 09:15:02 S 10 50 17.280 +58 21 43.06 V C57
2024-02-22 09:15:02 s 1 +128210.90 8 +279321.93 9460.0 C57
2024-02-22 09:21:17 C 10 47 44.385 +58 23 27.67 X F52
2024-02-22 09:35:02 S 10 50 12.134 +58 21 30.31 V C57
2024-02-22 09:35:02 s 1 +127366.87 3 +279358.51 4000.0 C57
2024-02-22 09:35:26 C 10 47 40.768 +58 23 18.23 X F52
2024-02-22 09:49:37 C 10 47 37.149 +58 23 08.74 X F52
2024-02-22 09:53:26 C 10 47 36.175 +58 23 06.18 X F51
2024-02-22 09:55:02 S 10 50 07.368 +58 21 18.04 V C57
2024-02-22 09:55:02 s 1 +126520.29 0 +279389.49 6060.0 C57
2024-02-22 10:03:48 C 10 47 33.528 +58 22 59.13 X F52
2024-02-22 10:08:05 C 10 47 32.427 +58 22 56.22 X F51
2024-02-22 10:15:02 S 10 50 02.407 +58 21 05.98 V C57
2024-02-22 10:15:02 s 1 +125671.18 0 +279414.88 5810.0 C57
2024-02-22 10:22:42 C 10 47 28.685 +58 22 46.24 X F51
2024-02-22 10:35:02 S 10 49 57.278 +58 20 52.26 V C57
2024-02-22 10:35:02 s 1 +124819.55 8 +279434.68 3400.0 C57
2024-02-22 10:37:30 C 10 47 24.900 +58 22 36.02 X F51
2024-02-22 10:55:02 S 10 49 52.241 +58 20 38.94 V C57
2024-02-22 10:55:02 s 1 +123965.41 3 +279448.83 8970.0 C57
2024-02-22 11:15:02 S 10 49 47.371 +58 20 26.59 V C57
2024-02-22 11:15:02 s 1 +123108.76 5 +279457.32 2690.0 C57
2024-02-22 11:35:02 S 10 49 42.139 +58 20 13.74 V C57
2024-02-22 11:35:02 s 1 +122249.62 9 +279460.16 4730.0 C57
2024-02-22 11:55:02 S 10 49 37.183 +58 20 01.03 V C57
2024-02-22 11:55:02 s 1 +121387.99 6 +279457.29 5230.0 C57
2024-02-22 12:15:02 S 10 49 32.448 +58 19 48.97 V C57
2024-02-22 12:15:02 s 1 +120523.88 4 +279448.71 4350.0 C57
2024-02-22 12:35:02 S 10 49 27.132 +58 19 35.11 V C57
2024-02-22 12:35:02 s 1 +119657.31 0 +279434.41 2270.0 C57
2024-02-22 12:55:02 S 10 49 22.159 +58 19 22.40 V C57
2024-02-22 12:55:02 s 1 +118788.20 9 +279414.33 8920.0 C57
2024-02-22 13:15:02 S 10 49 17.256 +58 19 09.98 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)