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
2024-04-26 08:11:12 C 09 28 25.591 +23 49 40.73 V T05
2024-04-26 08:20:21 C 09 28 26.004 +23 49 30.14 V T05
2024-04-26 08:34:40 C 09 28 26.594 +23 49 13.80 V T05
2024-04-28 05:32:32 C 09 30 36.788 +22 57 50.80 V 703
2024-04-28 05:35:48 C 09 30 36.925 +22 57 47.41 V 703
2024-04-28 05:39:04 C 09 30 37.098 +22 57 42.91 V 703
2024-04-28 05:42:20 C 09 30 37.199 +22 57 40.03 V 703
2024-04-29 05:09:13 C 09 31 47.100 +22 31 11.03 V 703
2024-04-29 05:12:29 C 09 31 47.302 +22 31 06.85 V 703
2024-04-29 05:15:45 C 09 31 47.406 +22 31 03.94 V 703
2024-04-29 05:19:01 C 09 31 47.586 +22 30 58.90 V 703
2024-04-30 05:34:01 C 09 33 01.148 +22 03 48.49 V 703
2024-04-30 05:37:17 C 09 33 01.292 +22 03 45.11 V 703
2024-04-30 05:40:34 C 09 33 01.498 +22 03 40.00 V 703
2024-04-30 05:43:50 C 09 33 01.624 +22 03 37.44 V 703
2024-05-01 05:21:38 C 09 34 14.563 +21 37 17.90 V 703
2024-05-01 05:24:59 C 09 34 14.815 +21 37 16.18 V 703
2024-05-01 05:28:19 C 09 34 15.074 +21 37 12.65 V 703
2024-05-01 05:31:39 C 09 34 15.247 +21 37 09.41 V 703
2024-05-02 04:34:12 C 09 35 27.733 +21 11 40.81 V G96
2024-05-02 04:42:19 C 09 35 28.136 +21 11 31.78 V G96
2024-05-02 04:50:25 C 09 35 28.554 +21 11 22.63 V G96
2024-05-02 04:58:31 C 09 35 28.957 +21 11 13.74 V G96
2024-05-03 06:38:10 C 09 36 51.103 +20 43 06.28 V T05
2024-05-03 06:42:44 C 09 36 51.384 +20 43 02.06 V T05
2024-05-03 06:51:29 C 09 36 51.842 +20 42 52.45 V T05
2024-05-03 07:07:19 C 09 36 52.644 +20 42 34.16 V T05
2024-05-06 04:16:57 C 09 40 40.469 +19 27 36.11 V 703
2024-05-06 04:20:25 C 09 40 40.681 +19 27 32.51 V 703
2024-05-06 04:23:53 C 09 40 40.793 +19 27 28.04 V 703
2024-05-06 04:27:21 C 09 40 40.998 +19 27 24.55 V 703
2024-05-07 05:13:45 C 09 42 04.950 +19 00 52.13 V 703
2024-05-07 05:17:05 C 09 42 05.044 +19 00 49.28 V 703
2024-05-07 05:20:27 C 09 42 05.188 +19 00 45.25 V 703
2024-05-07 05:23:47 C 09 42 05.375 +19 00 41.62 V 703
2024-05-07 06:40:53 C 09 42 09.994 +18 59 23.57 V T05
2024-05-07 06:45:27 C 09 42 10.303 +18 59 18.60 V T05
2024-05-07 06:52:54 C 09 42 10.675 +18 59 10.57 V T05
2024-05-07 07:08:50 C 09 42 11.527 +18 58 53.18 V T05
2024-05-21 04:43:21 C 10 02 41.608 +13 15 07.45 V G96
2024-05-21 04:49:28 C 10 02 42.004 +13 15 01.15 V G96
2024-05-21 04:55:34 C 10 02 42.371 +13 14 55.07 V G96
2024-05-21 05:01:42 C 10 02 42.774 +13 14 48.98 V G96
2024-05-26 06:58:11 C 10 10 50.158 +11 13 59.66 V T05
2024-05-26 07:02:45 C 10 10 50.542 +11 13 55.49 V T05
2024-05-26 07:13:20 C 10 10 51.149 +11 13 44.80 V T05
2024-05-26 07:29:00 C 10 10 52.207 +11 13 29.50 V T05
2024-12-10 04:59:59 C 20 29 15.533 +17 32 29.65 V T05
2024-12-10 05:10:32 C 20 29 17.122 +17 33 10.87 V T05
2024-12-10 05:21:42 C 20 29 18.826 +17 33 54.43 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)