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
2022-06-15 01:46:36 C 10 21 58.867 -31 41 01.10 V W68
2022-06-15 23:41:30 C 10 20 53.237 -31 48 23.40 V W68
2022-06-15 23:45:53 C 10 20 52.987 -31 48 24.70 V W68
2022-06-15 23:55:13 C 10 20 52.435 -31 48 27.47 V W68
2022-06-16 00:09:34 C 10 20 51.629 -31 48 31.82 V W68
2022-07-06 17:17:38 C 09 57 11.734 -34 14 49.92 V M22
2022-07-06 17:22:55 C 09 57 11.410 -34 14 50.53 V M22
2022-07-06 17:30:46 C 09 57 10.961 -34 14 51.43 V M22
2022-07-06 17:47:19 C 09 57 09.970 -34 14 54.02 V M22
2022-07-08 23:14:25 C 09 54 10.138 -34 23 58.34 V W68
2022-07-08 23:19:03 C 09 54 09.845 -34 23 58.42 V W68
2022-07-08 23:27:39 C 09 54 09.310 -34 23 59.03 V W68
2022-07-08 23:42:07 C 09 54 08.424 -34 24 01.08 V W68
2022-09-27 14:31:24 C 09 03 11.594 +19 35 15.36 V T05
2022-09-27 14:37:15 C 09 03 12.290 +19 35 22.52 V T05
2022-09-27 15:04:53 C 09 03 15.389 +19 35 55.00 V T05
2022-09-27 15:16:44 C 09 03 16.783 +19 36 09.47 V T05
2022-09-28 11:47:46 C 09 05 38.857 +19 59 28.50 V V00
2022-09-28 11:55:05 C 09 05 39.696 +19 59 36.85 V V00
2022-09-28 12:02:23 C 09 05 40.528 +19 59 45.13 V V00
2022-09-28 12:09:41 C 09 05 41.363 +19 59 53.41 V V00
2022-10-21 12:08:47 C 10 16 47.089 +25 13 35.76 V 703
2022-10-21 12:14:11 C 10 16 47.827 +25 13 36.12 V 703
2022-10-21 12:19:35 C 10 16 48.450 +25 13 37.81 V 703
2022-10-21 12:25:00 C 10 16 49.134 +25 13 38.39 V 703
2022-10-24 14:40:34 C 10 26 38.342 +25 21 41.15 V T08
2022-10-24 15:07:11 C 10 26 41.842 +25 21 43.02 V T08
2022-10-24 15:16:33 C 10 26 43.013 +25 21 44.64 V T08
2022-10-24 15:23:24 C 10 26 43.886 +25 21 44.75 V T08
2022-10-30 11:58:55 C 10 45 01.631 +25 22 45.88 V 703
2022-10-30 12:04:38 C 10 45 02.365 +25 22 45.48 V 703
2022-10-30 12:10:21 C 10 45 02.966 +25 22 45.62 V 703
2022-10-30 12:16:04 C 10 45 03.776 +25 22 45.44 V 703
2022-11-01 14:45:51 C 10 51 30.986 +25 19 23.30 V T08
2022-11-01 15:06:14 C 10 51 33.490 +25 19 22.80 V T08
2022-11-01 15:11:39 C 10 51 34.152 +25 19 22.40 V T08
2022-11-01 15:22:22 C 10 51 35.491 +25 19 20.71 V T08
2022-11-14 14:14:38 C 11 29 34.723 +24 27 16.85 V T05
2022-11-14 14:19:51 C 11 29 35.323 +24 27 15.91 V T05
2022-11-14 14:40:10 C 11 29 37.654 +24 27 12.24 V T05
2022-11-14 14:48:43 C 11 29 38.640 +24 27 10.01 V T05
2022-11-21 11:44:43 C 11 48 26.701 +23 45 43.42 V 703
2022-11-21 11:52:22 C 11 48 27.508 +23 45 41.44 V 703
2022-11-21 12:00:01 C 11 48 28.436 +23 45 39.31 V 703
2022-11-21 12:07:39 C 11 48 29.282 +23 45 37.66 V 703
2022-11-24 11:44:00 C 11 56 20.051 +23 26 15.79 V 703
2022-11-24 11:59:09 C 11 56 21.592 +23 26 09.02 V 703
2022-11-24 12:06:44 C 11 56 22.333 +23 26 05.78 V 703
2022-11-25 14:43:21 C 11 59 14.431 +23 18 49.21 V T08
2022-11-25 14:48:01 C 11 59 14.921 +23 18 46.66 V T08
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)