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 13:15:02 s 1 +117914.71 7 +279388.10 7080.0 C57
2024-02-22 13:35:02 S 10 49 12.413 +58 18 57.13 V C57
2024-02-22 13:35:02 s 1 +117040.77 6 +279356.48 2280.0 C57
2024-02-22 13:55:02 S 10 49 07.111 +58 18 43.16 V C57
2024-02-22 13:55:02 s 1 +116164.38 9 +279319.02 6920.0 C57
2024-02-22 14:15:02 S 10 49 02.287 +58 18 31.21 V C57
2024-02-22 14:15:02 s 1 +115285.57 6 +279275.72 1180.0 C57
2024-02-22 14:35:02 S 10 48 57.014 +58 18 18.58 V C57
2024-02-22 14:35:02 s 1 +114404.35 4 +279226.59 5220.0 C57
2024-02-22 14:55:02 S 10 48 52.080 +58 18 04.50 V C57
2024-02-22 14:55:02 s 1 +113520.71 4 +279171.55 790.0 C57
2024-02-22 15:15:02 S 10 48 47.220 +58 17 51.14 V C57
2024-02-22 15:15:02 s 1 +112634.67 6 +279110.62 6680.0 C57
2024-02-22 15:35:02 S 10 48 42.245 +58 17 41.32 V C57
2024-02-22 15:35:02 s 1 +111746.25 6 +279043.79 2270.0 C57
2024-02-22 15:55:02 S 10 48 37.039 +58 17 28.32 V C57
2024-02-22 15:55:02 s 1 +110855.44 6 +278970.99 7390.0 C57
2024-02-22 16:15:02 S 10 48 31.882 +58 17 14.82 V C57
2024-02-22 16:15:02 s 1 +109962.26 7 +278892.24 1860.0 C57
2024-02-22 16:35:02 S 10 48 27.187 +58 17 01.90 V C57
2024-02-22 16:35:02 s 1 +109066.73 5 +278807.51 5510.0 C57
2024-02-22 17:15:02 S 10 48 17.558 +58 16 33.74 V C57
2024-02-22 17:15:02 s 1 +107268.60 8 +278619.98 9620.0 C57
2024-02-22 17:17:27 B 10 45 48.13 +58 17 51.3 Z O53
2024-02-22 17:26:46 B 10 45 45.73 +58 17 44.6 Z O53
2024-02-22 17:36:08 B 10 45 43.42 +58 17 37.9 Z O53
2024-02-22 19:55:02 S 10 47 36.658 +58 14 48.16 V C57
2024-02-22 19:55:02 s 1 +99983.688 0 +277626.16 6850.0 C57
2024-02-22 20:15:02 S 10 47 31.344 +58 14 35.59 V C57
2024-02-22 20:15:02 s 1 +99062.844 0 +277474.13 9370.0 C57
2024-02-22 20:35:02 S 10 47 26.407 +58 14 21.73 V C57
2024-02-22 20:35:02 s 1 +98139.771 0 +277315.87 8840.0 C57
2024-02-22 20:55:02 S 10 47 21.298 +58 14 08.74 V C57
2024-02-22 20:55:02 s 1 +97214.464 0 +277151.32 5040.0 C57
2024-02-22 21:15:02 S 10 47 16.250 +58 13 54.91 V C57
2024-02-22 21:15:02 s 1 +96286.944 0 +276980.46 7800.0 C57
2024-02-22 21:35:02 S 10 47 11.309 +58 13 42.85 V C57
2024-02-22 21:35:02 s 1 +95357.229 0 +276803.32 6910.0 C57
2024-02-22 21:55:02 S 10 47 06.142 +58 13 29.21 V C57
2024-02-22 21:55:02 s 1 +94425.313 0 +276619.80 2160.0 C57
2024-02-22 22:15:02 S 10 47 00.737 +58 13 14.45 V C57
2024-02-22 22:15:02 s 1 +93491.220 0 +276429.91 3360.0 C57
2024-02-22 22:35:02 S 10 46 55.932 +58 13 01.31 V C57
2024-02-22 22:35:02 s 1 +92554.967 0 +276233.66 310.0 C57
2024-02-22 22:55:02 S 10 46 50.981 +58 12 47.56 V C57
2024-02-22 22:55:02 s 1 +91616.549 0 +276030.97 2770.0 C57
2024-02-22 23:15:02 S 10 46 45.686 +58 12 33.88 V C57
2024-02-22 23:15:02 s 1 +90675.988 0 +275821.85 560.0 C57
2024-02-22 23:35:02 S 10 46 40.718 +58 12 21.89 V C57
2024-02-22 23:35:02 s 1 +89733.304 0 +275606.29 3480.0 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)