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
2024-02-07 12:43:18 C 12 17 04.118 +58 50 43.04 V T05
2024-02-07 12:47:12 C 12 17 03.216 +58 50 44.99 V T05
2024-02-07 12:47:51 C 12 17 03.048 +58 50 45.49 V T05
2024-02-07 12:55:41 C 12 17 01.178 +58 50 49.52 V T05
2024-02-10 17:24:05 C 11 59 04.181 +59 21 04.21 q Q21
2024-02-10 17:31:39 C 11 59 02.222 +59 21 06.23 q Q21
2024-02-11 11:50:57 C 11 54 32.453 +59 25 48.90 V T05
2024-02-11 11:54:12 C 11 54 31.586 +59 25 49.66 V T05
2024-02-11 11:58:45 C 11 54 30.406 +59 25 50.74 V T05
2024-02-11 12:33:01 C 11 54 21.427 +59 25 58.91 V T05
2024-02-12 06:15:47 C 11 49 57.650 +59 29 07.73 Z U76
2024-02-12 06:34:14 C 11 49 52.819 +59 29 11.94 Z U76
2024-02-12 06:51:40 C 11 49 48.341 +59 29 16.01 Z U76
2024-02-12 23:17:07 C 11 45 37.656 +59 31 22.51 Z C23
2024-02-12 23:23:41 C 11 45 36.034 +59 31 23.20 Z C23
2024-02-12 23:28:01 C 11 45 34.879 +59 31 24.56 Z C23
2024-02-14 08:01:21 C 11 37 13.530 +59 33 03.13 V 703
2024-02-14 08:04:53 C 11 37 12.576 +59 33 03.17 V 703
2024-02-14 08:08:26 C 11 37 11.615 +59 33 02.88 V 703
2024-02-14 08:11:58 C 11 37 10.679 +59 33 04.00 V 703
2024-02-15 10:35:01 C 11 30 18.245 +59 31 29.06 V G96
2024-02-15 10:42:39 C 11 30 16.164 +59 31 28.06 V G96
2024-02-15 10:50:17 C 11 30 14.087 +59 31 26.98 V G96
2024-02-15 10:57:56 C 11 30 12.017 +59 31 25.93 V G96
2024-02-15 11:15:10 C 11 30 09.638 +59 31 29.60 V T05
2024-02-15 11:17:46 C 11 30 08.914 +59 31 29.42 V T05
2024-02-15 11:57:14 C 11 29 58.130 +59 31 25.72 V T05
2024-02-15 12:03:04 C 11 29 56.530 +59 31 25.00 V T05
2024-02-16 07:34:51 C 11 24 52.268 +59 28 26.04 V 703
2024-02-16 07:38:04 C 11 24 51.412 +59 28 25.72 V 703
2024-02-16 07:41:17 C 11 24 50.519 +59 28 25.03 V 703
2024-02-16 07:44:30 C 11 24 49.633 +59 28 24.56 V 703
2024-02-16 22:40:42 C 11 20 56.390 +59 25 05.70 Z C23
2024-02-16 22:43:25 C 11 20 55.718 +59 25 05.41 Z C23
2024-02-16 22:45:33 C 11 20 55.054 +59 25 04.33 Z C23
2024-02-18 00:00:30 C 11 14 21.18 +59 17 59.7 q Y96
2024-02-18 00:08:36 C 11 14 18.98 +59 17 57.5 q Y96
2024-02-18 00:16:43 C 11 14 16.81 +59 17 55.0 q Y96
2024-02-18 08:16:47 C 11 12 11.984 +59 15 12.71 V 703
2024-02-18 08:17:30 C 11 12 11.758 +59 15 12.13 V 703
2024-02-18 08:20:00 C 11 12 11.113 +59 15 11.45 V 703
2024-02-18 08:20:45 C 11 12 10.883 +59 15 11.27 V 703
2024-02-18 08:23:14 C 11 12 10.242 +59 15 10.44 V 703
2024-02-18 08:23:58 C 11 12 10.012 +59 15 10.08 V 703
2024-02-18 08:26:28 C 11 12 09.364 +59 15 09.29 V 703
2024-02-18 08:27:12 C 11 12 09.151 +59 15 08.89 V 703
2024-02-19 09:04:59 C 11 05 50.389 +59 05 09.10 X F51
2024-02-19 09:23:44 C 11 05 45.388 +59 05 01.62 X F51
2024-02-19 09:42:28 C 11 05 40.372 +59 04 54.04 X F51
2024-02-19 10:01:15 C 11 05 35.336 +59 04 46.28 X F51
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)