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 23:55:02 S 10 46 35.774 +58 12 07.81 V C57
2024-02-22 23:55:02 s 1 +88788.493 0 +275384.21 1290.0 C57
2024-02-23 00:15:02 S 10 46 30.468 +58 11 53.59 V C57
2024-02-23 00:15:02 s 1 +87841.576 0 +275155.63 3790.0 C57
2024-02-23 00:35:02 S 10 46 25.577 +58 11 38.94 V C57
2024-02-23 00:35:02 s 1 +86892.572 0 +274920.54 780.0 C57
2024-02-23 00:55:02 S 10 46 20.501 +58 11 26.05 V C57
2024-02-23 00:55:02 s 1 +85941.480 0 +274678.86 2000.0 C57
2024-02-23 01:15:02 S 10 46 15.199 +58 11 12.48 V C57
2024-02-23 01:15:02 s 1 +84988.320 0 +274430.61 7270.0 C57
2024-02-23 01:35:02 S 10 46 10.243 +58 10 59.66 V C57
2024-02-23 01:35:02 s 1 +84033.113 0 +274175.77 6370.0 C57
2024-02-23 01:55:02 S 10 46 05.002 +58 10 45.19 V C57
2024-02-23 01:55:02 s 1 +83075.856 0 +273914.27 9040.0 C57
2024-02-23 02:15:02 S 10 46 00.163 +58 10 32.59 V C57
2024-02-23 02:15:02 s 1 +82116.573 0 +273646.13 5070.0 C57
2024-02-23 02:35:02 S 10 45 54.924 +58 10 18.34 V C57
2024-02-23 02:35:02 s 1 +81155.282 0 +273371.32 4280.0 C57
2024-02-23 02:55:02 S 10 45 49.886 +58 10 04.66 V C57
2024-02-23 02:55:02 s 1 +80191.982 0 +273089.78 6360.0 C57
2024-02-23 03:15:02 S 10 45 44.767 +58 09 49.64 V C57
2024-02-23 03:15:02 s 1 +79226.697 0 +272801.52 1130.0 C57
2024-02-23 03:35:02 S 10 45 39.478 +58 09 35.10 V C57
2024-02-23 03:35:02 s 1 +78259.447 0 +272506.52 8360.0 C57
2024-02-23 03:55:02 S 10 45 34.507 +58 09 22.75 V C57
2024-02-23 03:55:02 s 1 +77290.230 0 +272204.72 7780.0 C57
2024-02-23 04:15:02 S 10 45 29.498 +58 09 09.36 V C57
2024-02-23 04:15:02 s 1 +76319.071 0 +271896.11 9180.0 C57
2024-02-23 04:35:02 S 10 45 24.482 +58 08 56.18 V C57
2024-02-23 04:35:02 s 1 +75345.990 0 +271580.69 2330.0 C57
2024-02-23 04:55:02 S 10 45 19.373 +58 08 41.96 V C57
2024-02-23 04:55:02 s 1 +74370.987 0 +271258.39 6940.0 C57
2024-02-23 05:15:02 S 10 45 13.954 +58 08 27.38 V C57
2024-02-23 05:15:02 s 1 +73394.086 0 +270929.21 2800.0 C57
2024-02-23 05:35:02 S 10 45 09.062 +58 08 14.42 V C57
2024-02-23 05:35:02 s 1 +72415.308 0 +270593.15 9700.0 C57
2024-02-23 05:55:02 S 10 45 04.020 +58 07 59.63 V C57
2024-02-23 05:55:02 s 1 +71434.654 0 +270250.12 7300.0 C57
2024-02-23 06:15:02 S 10 44 58.910 +58 07 46.13 V C57
2024-02-23 06:15:02 s 1 +70452.148 0 +269900.13 5410.0 C57
2024-02-23 06:55:02 S 10 44 48.398 +58 07 17.80 V C57
2024-02-23 06:55:02 s 1 +68481.649 0 +269179.20 2140.0 C57
2024-02-23 07:15:02 S 10 44 43.426 +58 07 02.82 V C57
2024-02-23 07:15:02 s 1 +67493.681 0 +268808.17 210.0 C57
2024-02-23 07:35:02 S 10 44 38.330 +58 06 49.43 V C57
2024-02-23 07:35:02 s 1 +66503.932 0 +268430.10 7800.0 C57
2024-02-23 07:55:02 S 10 44 33.235 +58 06 35.17 V C57
2024-02-23 07:55:02 s 1 +65512.405 0 +268044.92 4540.0 C57
2024-02-23 08:15:02 S 10 44 28.003 +58 06 21.60 V C57
2024-02-23 08:15:02 s 1 +64519.123 0 +267652.61 230.0 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)