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
2024-02-23 08:35:02 S 10 44 22.913 +58 06 07.06 V C57
2024-02-23 08:35:02 s 1 +63524.111 0 +267253.18 4640.0 C57
2024-02-23 08:55:02 S 10 44 17.813 +58 05 54.20 V C57
2024-02-23 08:55:02 s 1 +62527.372 0 +266846.56 7400.0 C57
2024-02-23 09:12:10 C 10 42 00.332 +58 05 48.17 X F52
2024-02-23 09:15:02 S 10 44 12.696 +58 05 39.98 V C57
2024-02-23 09:15:02 s 1 +61528.931 0 +266432.73 8290.0 C57
2024-02-23 09:19:11 C 10 41 58.596 +58 05 42.95 X F51
2024-02-23 09:27:14 C 10 41 56.563 +58 05 36.91 X F52
2024-02-23 09:35:02 S 10 44 07.560 +58 05 23.39 V C57
2024-02-23 09:35:02 s 1 +60528.811 0 +266011.70 7080.0 C57
2024-02-23 09:42:19 C 10 41 52.812 +58 05 25.63 X F52
2024-02-23 09:43:34 C 10 41 52.508 +58 05 24.71 X F51
2024-02-23 09:55:02 S 10 44 02.282 +58 05 11.22 V C57
2024-02-23 09:55:02 s 1 +59527.019 0 +265583.39 3400.0 C57
2024-02-23 09:55:48 C 10 41 49.455 +58 05 15.48 X F51
2024-02-23 09:57:26 C 10 41 49.048 +58 05 14.23 X F52
2024-02-23 10:15:02 S 10 43 57.158 +58 04 56.17 V C57
2024-02-23 10:15:02 s 1 +58523.578 0 +265147.80 7010.0 C57
2024-02-23 10:35:02 S 10 43 52.054 +58 04 42.42 V C57
2024-02-23 10:35:02 s 1 +57518.514 0 +264704.93 7670.0 C57
2024-02-23 10:55:02 S 10 43 47.035 +58 04 27.23 V C57
2024-02-23 10:55:02 s 1 +56511.832 0 +264254.69 5000.0 C57
2024-02-23 11:15:02 S 10 43 41.981 +58 04 12.54 V C57
2024-02-23 11:15:02 s 1 +55503.559 0 +263797.08 8770.0 C57
2024-02-23 11:16:53 C 10 41 29.201 +58 04 12.54 V T05
2024-02-23 11:20:54 C 10 41 28.198 +58 04 09.34 V T05
2024-02-23 11:22:12 C 10 41 27.862 +58 04 08.36 V T05
2024-02-23 11:35:02 S 10 43 36.686 +58 03 57.49 V C57
2024-02-23 11:35:02 s 1 +54493.719 0 +263332.11 8720.0 C57
2024-02-23 11:55:02 S 10 43 31.406 +58 03 43.74 V C57
2024-02-23 11:55:02 s 1 +53482.320 0 +262859.69 4460.0 C57
2024-02-23 12:01:45 C 10 41 17.974 +58 03 36.79 V T05
2024-02-23 12:03:03 C 10 41 17.678 +58 03 35.53 V T05
2024-02-23 12:07:37 C 10 41 16.498 +58 03 31.75 V T05
2024-02-23 12:13:06 C 10 41 15.146 +58 03 27.47 V T05
2024-02-23 12:15:02 S 10 43 26.419 +58 03 30.82 V C57
2024-02-23 12:15:02 s 1 +52469.388 0 +262379.82 5750.0 C57
2024-02-23 12:16:29 C 10 41 14.328 +58 03 24.48 V T05
2024-02-23 12:35:02 S 10 43 21.250 +58 03 13.93 V C57
2024-02-23 12:35:02 s 1 +51454.947 0 +261892.50 2340.0 C57
2024-02-23 12:55:02 S 10 43 16.241 +58 03 01.73 V C57
2024-02-23 12:55:02 s 1 +50439.008 0 +261397.65 3800.0 C57
2024-02-23 13:15:02 S 10 43 10.841 +58 02 46.25 V C57
2024-02-23 13:15:02 s 1 +49421.598 0 +260895.26 9900.0 C57
2024-02-23 13:35:02 S 10 43 05.741 +58 02 31.16 V C57
2024-02-23 13:35:02 s 1 +48402.741 0 +260385.34 370.0 C57
2024-02-23 13:55:02 S 10 43 00.742 +58 02 16.80 V C57
2024-02-23 13:55:02 s 1 +47382.447 0 +259867.80 4790.0 C57
2024-02-23 14:15:02 S 10 42 55.565 +58 02 02.65 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)