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
2025-01-06 04:58:35 C 22 38 48.605 +52 27 08.82 V T08
2025-01-06 05:09:18 C 22 38 51.382 +52 27 32.15 V T08
2025-01-06 05:30:00 C 22 38 56.846 +52 28 16.93 V T08
2025-01-08 04:54:24 C 22 52 11.244 +54 10 29.96 V T05
2025-01-08 04:59:03 C 22 52 12.521 +54 10 39.00 V T05
2025-01-08 05:09:42 C 22 52 15.466 +54 11 00.71 V T05
2025-01-08 05:14:58 C 22 52 16.934 +54 11 10.93 V T05
2025-01-08 05:29:05 C 22 52 20.842 +54 11 38.98 V T05
2025-01-08 05:29:45 C 22 52 21.046 +54 11 40.45 V T05
2025-01-08 05:46:25 C 22 52 25.680 +54 12 13.61 V T05
2025-01-08 05:51:00 C 22 52 26.952 +54 12 22.64 V T05
2025-01-09 19:17:25 C 23 03 25.750 +55 26 58.92 Z C23
2025-01-09 19:38:48 C 23 03 31.934 +55 27 37.51 Z C23
2025-01-09 19:57:59 C 23 03 37.620 +55 28 14.12 Z C23
2025-01-10 17:10:48 C 23 10 03.655 +56 08 22.34 Z C23
2025-01-10 17:44:58 C 23 10 13.846 +56 09 24.77 Z C23
2025-01-10 18:15:46 C 23 10 23.026 +56 10 20.50 Z C23
2025-01-12 06:37:21 C 23 21 42.360 +57 14 55.64 V T05
2025-01-12 06:42:02 C 23 21 43.810 +57 15 02.88 V T05
2025-01-12 06:50:01 C 23 21 46.318 +57 15 16.02 V T05
2025-01-12 07:09:59 C 23 21 52.548 +57 15 48.06 V T05
2025-01-13 18:05:30 C 23 33 12.672 +58 12 56.63 Z C23
2025-01-13 18:37:41 C 23 33 23.052 +58 13 45.41 Z C23
2025-01-13 19:13:37 C 23 33 34.656 +58 14 39.26 Z C23
2025-01-16 06:20:15 C 23 53 34.291 +59 40 29.68 V T05
2025-01-16 06:24:51 C 23 53 35.846 +59 40 35.47 V T05
2025-01-16 06:51:56 C 23 53 45.086 +59 41 09.10 V T05
2025-01-20 06:02:33 C 00 28 01.841 +61 30 01.12 V T05
2025-01-20 06:07:09 C 00 28 03.521 +61 30 05.26 V T05
2025-01-20 06:21:20 C 00 28 08.626 +61 30 17.68 V T05
2025-01-20 06:29:54 C 00 28 11.722 +61 30 25.42 V T05
2025-01-22 06:01:23 C 00 46 04.442 +62 11 12.70 V T08
2025-01-22 06:18:45 C 00 46 10.846 +62 11 24.68 V T08
2025-01-22 06:38:59 C 00 46 18.377 +62 11 38.33 V T08
2025-01-24 05:59:04 C 01 04 27.746 +62 43 17.76 V T05
2025-01-24 06:03:43 C 01 04 29.534 +62 43 20.17 V T05
2025-01-24 06:11:40 C 01 04 32.525 +62 43 24.17 V T05
2025-01-24 06:33:43 C 01 04 40.771 +62 43 35.15 V T05
2025-02-03 06:02:10 C 02 36 26.882 +63 16 36.41 V T08
2025-02-03 06:07:33 C 02 36 28.810 +63 16 34.79 V T08
2025-02-03 06:14:57 C 02 36 31.430 +63 16 32.59 V T08
2025-02-03 06:38:27 C 02 36 39.785 +63 16 25.75 V T08
2025-02-03 07:02:26 C 02 36 48.329 +63 16 17.90 V T08
2025-02-03 07:10:24 C 02 36 51.185 +63 16 15.42 V T08
2025-02-03 07:29:14 C 02 36 57.953 +63 16 09.26 V T08
2025-02-05 18:44:44 C 02 58 19.37 +62 55 37.7 Z M62
2025-02-05 18:54:22 C 02 58 22.68 +62 55 33.3 Z M62
2025-02-05 19:03:43 C 02 58 25.89 +62 55 29.1 Z M62
2025-02-11 07:10:33 C 03 42 23.520 +61 39 01.98 V T08
2025-02-11 07:18:34 C 03 42 26.095 +61 38 55.82 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)