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
2024-02-24 14:15:02 S 10 36 37.282 +57 43 24.35 V C57
2024-02-24 14:15:02 s 1 -29050.316 0 +199559.67 0.822 C57
2024-02-24 14:35:02 S 10 36 32.234 +57 43 08.11 V C57
2024-02-24 14:35:02 s 1 -30089.363 0 +198396.94 0.436 C57
2024-02-24 14:55:02 S 10 36 26.741 +57 42 50.90 V C57
2024-02-24 14:55:02 s 1 -31126.957 0 +197224.35 0.822 C57
2024-02-24 15:15:02 S 10 36 21.446 +57 42 35.50 V C57
2024-02-24 15:15:02 s 1 -32163.039 0 +196041.92 0.934 C57
2024-02-24 15:35:02 S 10 36 16.133 +57 42 18.29 V C57
2024-02-24 15:35:02 s 1 -33197.549 0 +194849.65 0.716 C57
2024-02-24 15:55:02 S 10 36 10.922 +57 42 02.70 V C57
2024-02-24 15:55:02 s 1 -34230.410 0 +193647.45 0.057 C57
2024-02-24 16:15:02 S 10 36 05.345 +57 41 44.95 V C57
2024-02-24 16:15:02 s 1 -35261.560 0 +192435.35 0.906 C57
2024-02-24 16:35:02 S 10 35 59.988 +57 41 28.50 V C57
2024-02-24 16:35:02 s 1 -36290.938 0 +191213.33 0.208 C57
2024-02-24 16:55:02 S 10 35 54.691 +57 41 12.44 V C57
2024-02-24 16:55:02 s 1 -37318.460 0 +189981.32 0.846 C57
2024-02-24 17:15:02 S 10 35 49.214 +57 40 54.73 V C57
2024-02-24 17:15:02 s 1 -38344.065 0 +188739.33 0.769 C57
2024-02-24 17:35:02 S 10 35 43.954 +57 40 38.42 V C57
2024-02-24 17:35:02 s 1 -39367.689 0 +187487.36 0.921 C57
2024-02-24 17:55:02 S 10 35 38.597 +57 40 20.57 V C57
2024-02-24 17:55:02 s 1 -40389.242 0 +186225.34 0.181 C57
2024-02-24 18:15:02 S 10 35 33.422 +57 40 04.15 V C57
2024-02-24 18:15:02 s 1 -41408.661 0 +184953.26 0.495 C57
2024-02-24 18:35:02 S 10 35 27.900 +57 39 48.28 V C57
2024-02-24 18:35:02 s 1 -42425.878 0 +183671.16 0.806 C57
2024-02-24 22:15:02 S 10 34 28.546 +57 36 38.02 V C57
2024-02-24 22:15:02 s 1 -53446.918 0 +168898.41 0.139 C57
2024-02-24 22:35:02 S 10 34 23.467 +57 36 22.68 V C57
2024-02-24 22:35:02 s 1 -54431.391 0 +167494.23 0.736 C57
2024-02-24 22:55:02 S 10 34 17.858 +57 36 04.21 V C57
2024-02-24 22:55:02 s 1 -55412.566 0 +166079.75 0.186 C57
2024-02-24 23:15:02 S 10 34 12.826 +57 35 50.10 V C57
2024-02-24 23:15:02 s 1 -56390.365 0 +164655.01 0.43 C57
2024-02-24 23:35:02 S 10 34 07.301 +57 35 30.59 V C57
2024-02-24 23:35:02 s 1 -57364.707 0 +163220.04 0.4 C57
2024-02-24 23:55:02 S 10 34 01.867 +57 35 12.91 V C57
2024-02-24 23:55:02 s 1 -58335.472 0 +161774.75 0.948 C57
2024-02-25 00:15:02 S 10 33 56.750 +57 34 57.04 V C57
2024-02-25 00:15:02 s 1 -59302.578 0 +160319.18 0.015 C57
2024-02-25 00:35:02 S 10 33 50.875 +57 34 37.99 V C57
2024-02-25 00:35:02 s 1 -60265.942 0 +158853.36 0.531 C57
2024-02-25 00:55:02 S 10 33 45.614 +57 34 20.35 V C57
2024-02-25 00:55:02 s 1 -61225.436 0 +157377.21 0.344 C57
2024-02-25 01:15:02 S 10 33 40.332 +57 34 03.40 V C57
2024-02-25 01:15:02 s 1 -62180.977 0 +155890.78 0.393 C57
2024-02-25 01:35:02 S 10 33 34.985 +57 33 44.35 V C57
2024-02-25 01:35:02 s 1 -63132.477 0 +154394.08 0.607 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)