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
2024-03-16 09:39:46 C 09 22 20.071 +46 27 12.56 V T08
2024-03-16 09:43:57 C 09 22 19.778 +46 27 05.69 V T08
2024-03-16 09:52:20 C 09 22 19.150 +46 26 52.19 V T08
2024-03-16 10:07:08 C 09 22 18.038 +46 26 28.75 V T08
2024-03-18 03:59:07 C 09 19 43.381 +45 20 31.02 V 703
2024-03-18 04:02:17 C 09 19 43.187 +45 20 25.91 V 703
2024-03-18 04:05:28 C 09 19 42.992 +45 20 21.05 V 703
2024-03-18 04:08:37 C 09 19 42.809 +45 20 15.76 V 703
2024-03-18 04:44:20 C 09 19 40.75 +45 19 13.8 V U55
2024-03-18 04:52:26 C 09 19 40.26 +45 19 01.1 V U55
2024-03-18 05:00:32 C 09 19 39.76 +45 18 48.6 V U55
2024-03-18 08:25:20 C 09 19 27.749 +45 13 36.16 V T05
2024-03-18 08:29:55 C 09 19 27.430 +45 13 29.14 V T05
2024-03-18 08:41:11 C 09 19 26.722 +45 13 11.17 V T05
2024-03-18 08:55:46 C 09 19 25.786 +45 12 47.99 V T05
2024-03-18 22:02:04 C 09 18 43.226 +44 52 00.48 Z C23
2024-03-18 22:06:23 C 09 18 42.982 +44 51 53.39 Z C23
2024-03-18 22:10:42 C 09 18 42.694 +44 51 47.23 Z C23
2024-03-19 08:14:55 C 09 18 11.621 +44 36 09.40 V T08
2024-03-19 08:19:36 C 09 18 11.302 +44 36 02.02 V T08
2024-03-19 08:27:00 C 09 18 10.896 +44 35 50.21 V T08
2024-03-19 09:18:30 C 09 18 07.922 +44 34 28.45 V T08
2024-03-20 03:07:05 C 09 17 17.705 +44 06 26.60 Z U76
2024-03-20 03:18:05 C 09 17 17.148 +44 06 10.15 Z U76
2024-03-20 03:27:51 C 09 17 16.634 +44 05 54.17 Z U76
2024-03-23 09:09:54 C 09 14 16.094 +42 05 00.56 V T08
2024-03-23 09:24:34 C 09 14 15.574 +42 04 37.34 V T08
2024-03-23 09:28:45 C 09 14 15.430 +42 04 30.68 V T08
2024-03-23 09:37:59 C 09 14 15.120 +42 04 16.28 V T08
2024-03-24 06:31:33 C 09 13 40.146 +41 32 05.53 X F52
2024-03-24 07:06:10 C 09 13 38.986 +41 31 12.70 X F52
2024-03-24 07:23:57 C 09 13 38.387 +41 30 45.44 X F52
2024-03-24 22:48:56 C 09 13 14.162 +41 06 54.58 Z C23
2024-03-24 22:52:09 C 09 13 14.076 +41 06 50.04 Z C23
2024-03-24 22:56:28 C 09 13 14.052 +41 06 42.88 Z C23
2024-03-27 07:39:17 C 09 12 08.297 +39 40 48.42 X F51
2024-03-27 07:56:15 C 09 12 07.934 +39 40 22.73 X F51
2024-03-27 08:30:22 C 09 12 07.212 +39 39 30.96 X F51
2024-03-27 09:59:09 C 09 12 05.412 +39 37 15.89 V T08
2024-03-27 10:00:29 C 09 12 05.357 +39 37 13.33 V T08
2024-03-27 10:04:41 C 09 12 05.309 +39 37 07.14 V T08
2024-03-27 10:06:01 C 09 12 05.251 +39 37 05.30 V T08
2024-03-27 10:12:40 C 09 12 05.153 +39 36 54.83 V T08
2024-03-27 10:13:59 C 09 12 05.100 +39 36 52.56 V T08
2024-03-27 10:27:38 C 09 12 04.877 +39 36 32.00 V T08
2024-03-27 10:29:38 C 09 12 04.790 +39 36 28.84 V T08
2024-03-27 21:20:59 C 09 11 56.820 +39 20 03.70 Z C23
2024-03-27 21:26:23 C 09 11 56.774 +39 19 55.49 Z C23
2024-03-27 22:13:58 C 09 11 55.937 +39 18 43.52 Z C23
2024-03-27 22:17:11 C 09 11 55.879 +39 18 38.45 Z C23
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)