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
2025-02-27 16:49:16 B 05 23 05.35 +55 19 47.9 X L76
2025-02-27 16:59:26 B 05 23 07.45 +55 19 36.7 X L76
2025-02-27 17:09:37 B 05 23 09.55 +55 19 25.0 X L76
2025-03-03 02:43:52 C 05 39 23.594 +53 47 31.27 V 703
2025-03-03 02:47:22 C 05 39 24.268 +53 47 27.10 V 703
2025-03-03 02:50:51 C 05 39 24.905 +53 47 22.99 V 703
2025-03-03 02:54:21 C 05 39 25.556 +53 47 18.64 V 703
2025-03-03 07:06:55 C 05 40 13.226 +53 42 33.73 V T08
2025-03-03 07:20:22 C 05 40 15.696 +53 42 17.64 V T08
2025-03-03 07:22:20 C 05 40 16.123 +53 42 14.83 V T08
2025-03-03 07:26:59 C 05 40 16.903 +53 42 09.90 V T08
2025-03-03 07:34:56 C 05 40 18.372 +53 42 00.54 V T08
2025-03-03 07:39:36 C 05 40 19.253 +53 41 54.82 V T08
2025-03-03 07:41:36 C 05 40 19.627 +53 41 52.69 V T08
2025-03-03 07:49:00 C 05 40 21.005 +53 41 43.91 V T08
2025-03-05 02:58:50 C 05 48 26.118 +52 52 20.03 V G96
2025-03-05 03:07:04 C 05 48 27.569 +52 52 10.56 V G96
2025-03-05 03:15:18 C 05 48 28.940 +52 52 01.13 V G96
2025-03-05 03:23:31 C 05 48 30.481 +52 51 51.48 V G96
2025-03-15 07:17:06 C 06 29 02.966 +48 10 09.73 V T08
2025-03-15 07:21:53 C 06 29 03.655 +48 10 04.37 V T08
2025-03-15 07:29:52 C 06 29 04.800 +48 09 55.04 V T08
2025-03-15 07:53:17 C 06 29 08.210 +48 09 27.90 V T08
2025-03-17 07:00:57 C 06 36 09.530 +47 15 12.96 V T05
2025-03-17 07:05:34 C 06 36 10.202 +47 15 07.24 V T05
2025-03-17 07:11:32 C 06 36 11.090 +47 15 00.54 V T05
2025-03-17 07:15:37 C 06 36 11.640 +47 14 55.32 V T05
2025-03-17 07:19:41 C 06 36 12.178 +47 14 50.60 V T05
2025-03-17 07:24:19 C 06 36 12.871 +47 14 45.74 V T05
2025-03-17 07:34:28 C 06 36 14.242 +47 14 33.47 V T05
2025-03-17 07:44:25 C 06 36 15.708 +47 14 20.98 V T05
2025-03-18 04:45:36 C 06 39 19.274 +46 50 10.97 V G96
2025-03-18 04:55:29 C 06 39 20.657 +46 49 59.56 V G96
2025-03-18 05:03:41 C 06 39 21.816 +46 49 49.84 V G96
2025-03-18 05:11:54 C 06 39 22.964 +46 49 40.30 V G96
2025-03-20 03:57:44 C 06 46 02.780 +45 56 11.98 V 703
2025-03-20 04:00:50 C 06 46 03.162 +45 56 07.04 V 703
2025-03-20 04:03:56 C 06 46 03.608 +45 56 03.55 V 703
2025-03-20 04:07:03 C 06 46 03.968 +45 56 00.31 V 703
2025-03-22 05:04:54 C 06 52 49.984 +45 00 14.83 V 703
2025-03-22 05:11:07 C 06 52 50.912 +45 00 08.06 V 703
2025-03-22 05:14:14 C 06 52 51.283 +45 00 03.53 V 703
2025-03-23 07:35:35 C 06 56 25.361 +44 30 15.23 V T08
2025-03-23 07:40:14 C 06 56 25.944 +44 30 09.72 V T08
2025-03-23 07:48:12 C 06 56 26.988 +44 30 00.86 V T08
2025-03-23 08:20:20 C 06 56 31.138 +44 29 22.96 V T08
2025-03-25 06:38:23 C 07 02 40.116 +43 37 11.78 V T05
2025-03-25 06:42:58 C 07 02 40.514 +43 37 06.60 V T05
2025-03-25 06:51:52 C 07 02 41.758 +43 36 57.42 V T05
2025-03-25 07:11:13 C 07 02 44.177 +43 36 34.92 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)