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
2024-03-04 20:13:12 C 09 52 22.865 +53 25 48.40 Z C23
2024-03-04 20:26:59 C 09 52 20.690 +53 25 29.78 Z C23
2024-03-04 21:20:28 C 09 52 12.108 +53 24 17.17 Z C23
2024-03-05 14:09:31 B 09 49 41.00 +53 01 05.1 Z O53
2024-03-05 14:27:07 B 09 49 38.19 +53 00 41.2 Z O53
2024-03-05 14:38:33 B 09 49 36.42 +53 00 25.9 Z O53
2024-03-06 13:40:08 B 09 46 18.90 +52 27 42.6 Z O53
2024-03-06 13:55:47 B 09 46 16.62 +52 27 20.5 Z O53
2024-03-06 14:11:04 B 09 46 14.32 +52 26 59.0 Z O53
2024-03-06 20:25:07 C 09 45 21.646 +52 17 58.24 W M01
2024-03-06 20:27:37 C 09 45 21.273 +52 17 54.61 W M01
2024-03-06 20:30:07 C 09 45 20.901 +52 17 50.98 W M01
2024-03-07 00:55:56 C 09 44 43.702 +52 11 15.58 Z C23
2024-03-07 00:59:11 C 09 44 43.246 +52 11 10.72 Z C23
2024-03-07 01:03:30 C 09 44 42.672 +52 11 04.31 Z C23
2024-03-07 09:24:54 C 09 43 34.972 +51 59 00.96 V 703
2024-03-07 09:28:16 C 09 43 34.511 +51 58 56.10 V 703
2024-03-07 09:31:38 C 09 43 34.043 +51 58 51.31 V 703
2024-03-07 09:35:01 C 09 43 33.557 +51 58 45.70 V 703
2024-03-07 14:09:44 B 09 43 00.09 +51 52 14.7 Z O53
2024-03-07 14:25:22 B 09 42 57.88 +51 51 52.2 Z O53
2024-03-07 14:40:36 B 09 42 55.73 +51 51 30.5 Z O53
2024-03-07 22:09:13 C 09 41 56.007 +51 40 26.10 W M01
2024-03-07 22:11:43 C 09 41 55.668 +51 40 22.27 W M01
2024-03-07 22:14:13 C 09 41 55.329 +51 40 18.43 W M01
2024-03-08 00:58:44 C 09 41 34.284 +51 36 06.80 Z C23
2024-03-08 01:01:57 C 09 41 33.869 +51 36 02.20 Z C23
2024-03-08 01:05:12 C 09 41 33.382 +51 35 56.62 Z C23
2024-03-08 20:39:46 C 09 39 09.542 +51 06 55.94 Z C23
2024-03-08 20:43:01 C 09 39 09.067 +51 06 51.16 Z C23
2024-03-08 20:45:10 C 09 39 08.856 +51 06 47.59 Z C23
2024-03-10 14:34:19 B 09 34 23.45 +50 03 52.4 Z O54
2024-03-10 14:42:01 B 09 34 22.61 +50 03 40.5 Z O54
2024-03-10 14:49:44 B 09 34 21.68 +50 03 28.2 Z O54
2024-03-12 20:02:17 C 09 29 05.662 +48 41 20.90 W M01
2024-03-12 20:04:47 C 09 29 05.415 +48 41 17.04 W M01
2024-03-12 20:07:17 C 09 29 05.167 +48 41 13.19 W M01
2024-03-14 03:44:24 C 09 26 22.499 +47 51 51.05 V 703
2024-03-14 03:47:28 C 09 26 22.218 +47 51 45.72 V 703
2024-03-14 03:52:33 C 09 26 21.631 +47 51 37.04 V 703
2024-03-14 05:54:11 C 09 26 10.903 +47 48 28.33 V 703
2024-03-14 09:12:04 C 09 25 54.766 +47 43 22.04 V T05
2024-03-14 09:16:38 C 09 25 54.370 +47 43 14.77 V T05
2024-03-14 09:27:27 C 09 25 53.402 +47 42 57.74 V T05
2024-03-14 09:33:40 C 09 25 52.874 +47 42 47.88 V T05
2024-03-14 09:38:17 C 09 25 52.450 +47 42 40.43 V T05
2024-03-14 09:44:09 C 09 25 51.926 +47 42 31.10 V T05
2024-03-14 09:46:07 C 09 25 51.780 +47 42 28.26 V T05
2024-03-14 10:00:07 C 09 25 50.477 +47 42 05.69 V T05
2024-03-14 10:00:54 C 09 25 50.515 +47 42 04.68 V T05
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)