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
2023-12-31 12:33:47 C 13 33 24.979 +45 38 37.50 V T08
2024-01-02 13:54:19 C 13 33 51.830 +46 16 54.55 V T05
2024-01-02 14:02:11 C 13 33 51.835 +46 17 01.14 V T05
2024-01-02 14:06:44 C 13 33 51.830 +46 17 05.14 V T05
2024-01-02 14:26:30 C 13 33 51.811 +46 17 21.62 V T05
2024-01-04 15:19:36 C 13 34 00.698 +46 56 41.24 V T08
2024-01-04 15:33:45 C 13 34 00.578 +46 56 53.27 V T08
2024-01-04 15:43:36 C 13 34 00.461 +46 57 01.51 V T08
2024-01-04 15:59:37 C 13 34 00.307 +46 57 15.34 V T08
2024-01-06 13:25:10 C 13 33 52.742 +47 34 56.71 V T05
2024-01-06 13:59:31 C 13 33 52.282 +47 35 28.14 V T05
2024-01-06 14:04:04 C 13 33 52.231 +47 35 32.21 V T05
2024-01-06 14:11:53 C 13 33 52.111 +47 35 39.01 V T05
2024-01-08 15:19:46 C 13 33 20.659 +48 18 02.34 V T08
2024-01-08 15:24:31 C 13 33 20.537 +48 18 06.73 V T08
2024-01-08 15:36:32 C 13 33 20.256 +48 18 17.50 V T08
2024-01-08 15:54:34 C 13 33 19.805 +48 18 33.73 V T08
2024-01-14 12:47:34 C 13 29 28.014 +50 27 24.26 V 703
2024-01-14 12:50:43 C 13 29 27.852 +50 27 27.36 V 703
2024-01-14 12:53:51 C 13 29 27.697 +50 27 30.35 V 703
2024-01-14 12:56:59 C 13 29 27.528 +50 27 33.34 V 703
2024-01-16 13:06:55 C 13 27 11.574 +51 13 41.95 V 703
2024-01-16 13:10:03 C 13 27 11.362 +51 13 44.98 V 703
2024-01-16 13:13:11 C 13 27 11.128 +51 13 48.90 V 703
2024-01-16 13:16:19 C 13 27 10.951 +51 13 52.14 V 703
2024-01-16 13:40:37 C 13 27 11.304 +51 14 16.87 V T08
2024-01-16 13:44:36 C 13 27 11.047 +51 14 20.87 V T08
2024-01-16 13:50:36 C 13 27 10.666 +51 14 27.02 V T08
2024-01-16 14:11:36 C 13 27 09.355 +51 14 48.30 V T08
2024-01-16 14:24:44 C 13 27 08.544 +51 15 01.48 V T08
2024-01-16 14:27:23 C 13 27 08.378 +51 15 04.00 V T08
2024-01-16 14:32:43 C 13 27 08.035 +51 15 09.43 V T08
2024-01-16 14:42:27 C 13 27 07.416 +51 15 19.12 V T08
2024-01-18 12:24:28 C 13 24 26.356 +51 59 42.61 V 703
2024-01-18 12:29:45 C 13 24 25.952 +51 59 47.87 V 703
2024-01-18 12:35:01 C 13 24 25.578 +51 59 53.12 V 703
2024-01-18 12:40:17 C 13 24 25.182 +51 59 58.13 V 703
2024-01-20 11:46:20 C 13 21 06.336 +52 46 09.77 V 703
2024-01-20 11:52:11 C 13 21 05.789 +52 46 15.92 V 703
2024-01-20 12:03:53 C 13 21 04.784 +52 46 27.34 V 703
2024-01-20 12:55:05 C 13 21 02.239 +52 47 18.13 V T08
2024-01-20 12:59:06 C 13 21 01.898 +52 47 22.38 V T08
2024-01-20 13:03:16 C 13 21 01.553 +52 47 26.77 V T08
2024-01-20 13:12:49 C 13 21 00.727 +52 47 36.67 V T08
2024-01-22 13:31:39 C 13 16 56.580 +53 35 05.71 V T05
2024-01-22 13:40:17 C 13 16 55.702 +53 35 14.42 V T05
2024-01-22 14:02:49 C 13 16 53.410 +53 35 37.43 V T05
2024-01-22 14:05:25 C 13 16 53.136 +53 35 40.09 V T05
2024-01-24 14:38:55 C 13 12 04.946 +54 23 03.23 V T08
2024-01-24 14:43:04 C 13 12 04.428 +54 23 07.44 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)