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
2024-12-10 05:26:16 C 20 29 19.507 +17 34 12.61 V T05
2024-12-11 05:02:17 C 20 33 03.331 +19 06 27.36 V T08
2024-12-11 05:06:54 C 20 33 04.099 +19 06 44.75 V T08
2024-12-11 05:14:15 C 20 33 05.189 +19 07 13.55 V T08
2024-12-11 05:29:30 C 20 33 07.522 +19 08 12.44 V T08
2024-12-11 18:45:31 C 20 35 14.58 +19 59 39.1 V M14
2024-12-11 19:11:15 C 20 35 18.61 +20 01 18.7 V M14
2024-12-11 19:34:59 C 20 35 22.34 +20 02 50.1 V M14
2024-12-14 04:51:47 C 20 44 37.234 +23 44 04.42 V T05
2024-12-14 04:57:05 C 20 44 38.057 +23 44 25.12 V T05
2024-12-14 05:05:00 C 20 44 39.302 +23 44 54.64 V T05
2024-12-15 05:02:36 C 20 48 35.995 +25 16 02.75 V T08
2024-12-15 05:07:56 C 20 48 36.852 +25 16 23.12 V T08
2024-12-15 05:18:48 C 20 48 38.554 +25 17 03.37 V T08
2024-12-15 05:32:52 C 20 48 40.814 +25 17 56.00 V T08
2024-12-17 05:06:04 C 20 56 40.411 +28 15 49.93 V T05
2024-12-17 05:20:33 C 20 56 42.792 +28 16 42.71 V T05
2024-12-17 05:34:57 C 20 56 45.173 +28 17 35.23 V T05
2024-12-21 05:22:32 C 21 13 38.770 +34 01 07.75 V T05
2024-12-21 05:27:06 C 21 13 39.571 +34 01 23.27 V T05
2024-12-21 05:35:00 C 21 13 40.966 +34 01 50.02 V T05
2024-12-21 16:57:14 C 21 15 47.10 +34 40 54.5 V M32
2024-12-21 17:01:44 C 21 15 47.95 +34 41 09.3 V M32
2024-12-21 17:06:13 C 21 15 48.77 +34 41 24.5 V M32
2024-12-21 17:07:07 C 21 15 48.91 +34 41 27.1 V M32
2024-12-21 17:08:01 C 21 15 49.01 +34 41 30.5 V M32
2024-12-21 17:10:16 C 21 15 49.47 +34 41 38.7 V M32
2024-12-27 06:38:27 C 21 41 58.834 +41 55 02.39 V T05
2024-12-27 06:45:07 C 21 42 00.192 +41 55 22.19 V T05
2024-12-27 06:55:08 C 21 42 02.254 +41 55 51.92 V T05
2024-12-27 07:14:37 C 21 42 06.326 +41 56 49.42 V T05
2024-12-29 05:35:34 C 21 52 02.280 +44 14 35.45 V T08
2024-12-29 05:40:13 C 21 52 03.266 +44 14 48.41 V T08
2024-12-29 05:50:49 C 21 52 05.518 +44 15 18.22 V T08
2024-12-29 06:05:24 C 21 52 08.652 +44 15 59.22 V T08
2024-12-31 05:30:03 C 22 02 49.685 +46 29 30.80 V T05
2024-12-31 05:37:55 C 22 02 51.456 +46 29 51.65 V T05
2024-12-31 05:53:07 C 22 02 54.850 +46 30 31.79 V T05
2025-01-02 04:52:32 C 22 14 04.514 +48 35 27.46 V T08
2025-01-02 04:57:54 C 22 14 05.791 +48 35 40.81 V T08
2025-01-02 05:05:15 C 22 14 07.522 +48 35 59.14 V T08
2025-01-02 05:19:14 C 22 14 10.848 +48 36 34.20 V T08
2025-01-02 05:26:39 C 22 14 12.562 +48 36 52.81 V T08
2025-01-02 05:31:23 C 22 14 13.685 +48 37 04.58 V T08
2025-01-02 05:47:29 C 22 14 17.489 +48 37 44.83 V T08
2025-01-04 05:06:22 C 22 26 09.084 +50 35 43.80 V T05
2025-01-04 05:10:57 C 22 26 10.243 +50 35 55.21 V T05
2025-01-04 05:32:57 C 22 26 15.715 +50 36 46.08 V T05
2025-01-04 05:37:31 C 22 26 16.898 +50 36 57.49 V T05
2025-01-06 04:54:34 C 22 38 47.530 +52 27 00.47 V T08
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)