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 14:15:02 s 1 +46360.746 0 +259342.64 2900.0 C57
2024-02-23 14:35:02 S 10 42 50.198 +58 01 47.46 V C57
2024-02-23 14:35:02 s 1 +45337.663 0 +258809.86 4440.0 C57
2024-02-23 14:55:02 S 10 42 45.058 +58 01 33.17 V C57
2024-02-23 14:55:02 s 1 +44313.209 0 +258269.37 8950.0 C57
2024-02-23 15:15:02 S 10 42 39.883 +58 01 17.54 V C57
2024-02-23 15:15:02 s 1 +43287.414 0 +257721.18 6190.0 C57
2024-02-23 15:35:02 S 10 42 34.546 +58 01 03.25 V C57
2024-02-23 15:35:02 s 1 +42260.303 0 +257165.28 5890.0 C57
2024-02-23 15:55:02 S 10 42 29.753 +58 00 47.88 V C57
2024-02-23 15:55:02 s 1 +41231.890 0 +256601.58 7560.0 C57
2024-02-23 16:15:02 S 10 42 24.427 +58 00 34.13 V C57
2024-02-23 16:15:02 s 1 +40202.204 0 +256030.09 960.0 C57
2024-02-23 16:35:02 S 10 42 19.411 +58 00 20.16 V C57
2024-02-23 16:35:02 s 1 +39171.272 0 +255450.81 5810.0 C57
2024-02-23 16:55:02 S 10 42 13.608 +58 00 05.72 V C57
2024-02-23 16:55:02 s 1 +38139.110 0 +254863.64 1620.0 C57
2024-02-23 17:15:02 S 10 42 08.772 +57 59 49.16 V C57
2024-02-23 17:15:02 s 1 +37105.747 0 +254268.59 8120.0 C57
2024-02-23 17:35:02 S 10 42 03.739 +57 59 34.58 V C57
2024-02-23 17:35:02 s 1 +36071.210 0 +253665.66 5020.0 C57
2024-02-23 17:55:02 S 10 41 58.430 +57 59 20.90 V C57
2024-02-23 17:55:02 s 1 +35035.518 0 +253054.75 1830.0 C57
2024-02-23 18:15:02 S 10 41 53.045 +57 59 05.71 V C57
2024-02-23 18:15:02 s 1 +33998.699 0 +252435.88 8270.0 C57
2024-02-23 18:35:02 S 10 41 48.122 +57 58 50.02 V C57
2024-02-23 18:35:02 s 1 +32960.783 0 +251809.03 4050.0 C57
2024-02-23 18:55:02 S 10 41 42.914 +57 58 36.23 V C57
2024-02-23 18:55:02 s 1 +31921.788 0 +251174.12 8630.0 C57
2024-02-23 19:15:02 S 10 41 37.805 +57 58 20.46 V C57
2024-02-23 19:15:02 s 1 +30881.746 0 +250531.15 1750.0 C57
2024-02-23 19:35:02 S 10 41 32.527 +57 58 05.48 V C57
2024-02-23 19:35:02 s 1 +29840.685 0 +249880.11 3110.0 C57
2024-02-23 19:55:02 S 10 41 27.245 +57 57 50.76 V C57
2024-02-23 19:55:02 s 1 +28798.626 0 +249220.92 2150.0 C57
2024-02-23 20:15:02 S 10 41 22.056 +57 57 36.29 V C57
2024-02-23 20:15:02 s 1 +27755.601 0 +248553.58 8590.0 C57
2024-02-23 20:35:02 S 10 41 17.035 +57 57 20.66 V C57
2024-02-23 20:35:02 s 1 +26711.640 0 +247878.09 2130.0 C57
2024-02-23 20:55:02 S 10 41 12.046 +57 57 08.03 V C57
2024-02-23 20:55:02 s 1 +25666.766 0 +247194.35 2190.0 C57
2024-02-23 21:15:02 S 10 41 06.038 +57 56 50.96 V C57
2024-02-23 21:15:02 s 1 +24621.011 0 +246502.37 8490.0 C57
2024-02-23 21:35:02 S 10 41 01.510 +57 56 35.66 V C57
2024-02-23 21:35:02 s 1 +23574.406 0 +245802.15 700.0 C57
2024-02-23 21:55:02 S 10 40 55.956 +57 56 21.30 V C57
2024-02-23 21:55:02 s 1 +22526.975 0 +245093.59 8250.0 C57
2024-02-23 22:15:02 S 10 40 50.916 +57 56 05.32 V C57
2024-02-23 22:15:02 s 1 +21478.753 0 +244376.69 820.0 C57
2024-02-24 01:55:02 S 10 39 53.287 +57 53 14.17 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)