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
2007-04-09 23:30:08 C 09 39 16.09 +30 09 41.5 c A24
2007-04-09 23:31:34 C 09 39 16.07 +30 09 38.9 c A24
2007-04-10 21:43:26 C 09 39 06.02 +29 40 03.6 c A24
2007-04-10 21:44:53 C 09 39 06.02 +29 40 01.8 c A24
2007-04-10 21:49:43 C 09 39 05.96 +29 39 55.6 c A24
2007-04-10 21:51:10 C 09 39 05.96 +29 39 53.8 c A24
2007-04-10 22:08:07 C 09 39 05.79 +29 39 30.5 c A24
2007-04-10 22:32:49 C 09 39 05.56 +29 38 57.5 c A24
2007-04-10 22:56:00 C 09 39 05.33 +29 38 25.9 c A24
2007-04-10 22:57:31 C 09 39 05.33 +29 38 24.5 c A24
2007-04-10 23:02:49 C 09 39 05.29 +29 38 17.0 c A24
2007-04-10 23:04:19 C 09 39 05.26 +29 38 15.1 c A24
2007-04-11 04:30:45 C 09 39 03.81 +29 31 06.5 18.4 c 704
2007-04-11 04:45:06 C 09 39 03.66 +29 30 48.2 18.5 c 704
2007-04-11 04:59:26 C 09 39 03.52 +29 30 28.7 18.4 c 704
2007-04-11 05:13:35 C 09 39 03.38 +29 30 09.9 18.5 c 704
2007-04-11 22:13:17 C 09 38 58.79 +29 07 37.1 c A24
2007-04-11 22:14:44 C 09 38 58.74 +29 07 35.1 c A24
2007-04-11 22:19:31 C 09 38 58.74 +29 07 28.4 c A24
2007-04-11 22:20:58 C 09 38 58.73 +29 07 26.7 c A24
2007-04-11 22:31:40 C 09 38 58.66 +29 07 12.5 c A24
2007-04-11 22:50:03 C 09 38 58.56 +29 06 48.0 c A24
2007-04-11 23:06:58 C 09 38 58.45 +29 06 25.1 c A24
2007-04-11 23:08:26 C 09 38 58.46 +29 06 23.3 c A24
2007-04-11 23:13:14 C 09 38 58.39 +29 06 17.2 c A24
2007-04-11 23:14:44 C 09 38 58.43 +29 06 14.7 c A24
2007-04-11 23:27:21 C 09 38 58.37 +29 05 58.0 c A24
2007-04-11 23:47:43 C 09 38 58.26 +29 05 30.9 c A24
2007-04-12 00:06:38 C 09 38 58.15 +29 05 05.4 c A24
2007-04-12 00:08:05 C 09 38 58.12 +29 05 03.5 c A24
2007-04-12 00:12:54 C 09 38 58.11 +29 04 57.2 c A24
2007-04-12 00:14:20 C 09 38 58.10 +29 04 54.6 c A24
2007-04-16 04:58:42 C 09 39 14.18 +26 54 30.6 r H45
2007-04-16 05:00:04 C 09 39 14.23 +26 54 28.6 r H45
2007-04-16 05:03:32 C 09 39 14.24 +26 54 24.1 r H45
2007-04-16 05:05:39 C 09 39 14.21 +26 54 21.4 r H45
2007-04-16 05:06:52 C 09 39 14.21 +26 54 19.9 r H45
2007-04-16 19:32:58 C 09 39 22.52 +26 35 59.4 c A24
2007-04-16 19:34:24 C 09 39 22.55 +26 35 58.1 c A24
2007-04-16 19:49:42 C 09 39 22.73 +26 35 38.6 c A24
2007-04-16 20:55:09 C 09 39 23.14 +26 34 15.4 c A24
2007-04-16 21:10:25 C 09 39 23.14 +26 33 56.3 c A24
2007-04-16 21:11:51 C 09 39 23.21 +26 33 54.3 c A24
2007-04-17 04:18:22 C 09 39 27.60 +26 24 59.5 18.1 c 704
2007-04-17 04:31:45 C 09 39 27.62 +26 24 41.3 18.6 c 704
2007-04-17 04:45:03 C 09 39 27.70 +26 24 24.7 18.4 c 704
2007-04-17 04:59:17 C 09 39 27.84 +26 24 06.3 18.3 c 704
2007-04-17 05:13:06 C 09 39 27.88 +26 23 48.5 18.4 c 704
2007-04-17 19:33:24 C 09 39 38.06 +26 05 43.9 c A24
2007-04-17 19:34:51 C 09 39 38.08 +26 05 41.2 c A24
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)