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
2022-02-27 09:01:49 C 15 03 27.63 -02 24 38.1 u H21
2022-02-27 09:06:12 C 15 03 27.76 -02 24 40.0 u H21
2022-02-27 09:10:23 C 15 03 27.87 -02 24 41.9 u H21
2022-02-27 09:14:33 C 15 03 27.98 -02 24 43.7 u H21
2022-02-27 09:19:09 C 15 03 28.11 -02 24 45.8 u H21
2022-02-28 13:52:44 C 15 04 16.59 -02 37 20.9 V T08
2022-02-28 13:56:01 C 15 04 16.64 -02 37 22.0 V T08
2022-02-28 13:59:57 C 15 04 16.75 -02 37 23.4 V T08
2022-02-28 14:09:48 C 15 04 16.96 -02 37 28.2 V T08
2022-03-02 15:11:29 C 15 05 30.26 -02 59 36.5 V T05
2022-03-02 15:20:52 C 15 05 30.42 -02 59 40.7 V T05
2022-03-02 15:32:07 C 15 05 30.61 -02 59 46.0 V T05
2022-03-02 15:36:26 C 15 05 30.70 -02 59 48.3 V T05
2022-03-04 13:46:12 C 15 06 28.62 -03 21 12.2 V T08
2022-03-04 14:37:10 C 15 06 29.33 -03 21 36.3 V T08
2022-03-04 14:51:59 C 15 06 29.52 -03 21 42.9 V T08
2022-03-04 14:57:28 C 15 06 29.60 -03 21 46.0 V T08
2022-03-05 08:42:05 C 15 06 48.547 -03 29 54.74 V W68
2022-03-05 08:44:03 C 15 06 48.588 -03 29 55.75 V W68
2022-03-05 08:57:01 C 15 06 48.708 -03 30 01.69 V W68
2022-03-05 09:01:37 C 15 06 48.794 -03 30 03.71 V W68
2022-03-05 12:02:34 C 15 06 51.70 -03 31 48.8 V G96
2022-03-05 12:08:39 C 15 06 51.77 -03 31 51.5 V G96
2022-03-05 12:14:44 C 15 06 51.84 -03 31 54.4 V G96
2022-03-05 12:20:50 C 15 06 51.92 -03 31 57.4 V G96
2022-03-06 15:03:58 C 15 07 16.19 -03 44 46.1 V T05
2022-03-06 15:08:17 C 15 07 16.23 -03 44 48.5 V T05
2022-03-06 15:18:19 C 15 07 16.33 -03 44 53.2 V T05
2022-03-06 15:32:46 C 15 07 16.45 -03 45 00.4 V T05
2022-03-07 10:37:06 C 15 07 31.57 -03 54 23.7 V G96
2022-03-07 10:44:36 C 15 07 31.62 -03 54 27.4 V G96
2022-03-07 10:52:06 C 15 07 31.68 -03 54 31.1 V G96
2022-03-07 10:59:36 C 15 07 31.73 -03 54 34.8 V G96
2022-03-07 11:23:18 C 15 07 31.89 -03 54 46.4 V 703
2022-03-07 11:30:59 C 15 07 31.96 -03 54 50.3 V 703
2022-03-07 11:38:39 C 15 07 31.99 -03 54 54.2 V 703
2022-03-07 11:46:19 C 15 07 32.03 -03 54 57.9 V 703
2022-03-08 15:22:32 C 15 07 48.76 -04 08 39.8 V T08
2022-03-08 15:28:12 C 15 07 48.76 -04 08 43.2 V T08
2022-03-08 15:35:01 C 15 07 48.78 -04 08 46.9 V T08
2022-03-10 11:32:02 C 15 08 05.66 -04 31 23.1 V 703
2022-03-10 11:39:38 C 15 08 05.62 -04 31 27.1 V 703
2022-03-10 11:47:14 C 15 08 05.61 -04 31 31.0 V 703
2022-03-10 11:54:50 C 15 08 05.58 -04 31 36.1 V 703
2022-03-12 13:29:07 C 15 08 08.50 -04 58 00.4 V T08
2022-03-12 13:32:24 C 15 08 08.50 -04 58 02.2 V T08
2022-03-12 13:40:23 C 15 08 08.43 -04 58 06.7 V T08
2022-03-12 14:13:32 C 15 08 08.18 -04 58 25.0 V T08
2022-03-14 11:00:38 C 15 07 54.61 -05 23 29.0 V 703
2022-03-14 11:08:32 C 15 07 54.50 -05 23 33.5 V 703
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)