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
2007-03-13 01:13:03 C 10 27 22.71 +45 25 10.5 c A24
2007-03-13 01:49:12 C 10 27 17.04 +45 24 27.4 c A24
2007-03-13 01:50:38 C 10 27 16.80 +45 24 25.7 c A24
2007-03-13 04:40:03 C 10 26 53.12 +45 21 17.4 r 703
2007-03-13 04:46:33 C 10 26 52.08 +45 21 09.9 r 703
2007-03-13 04:53:05 C 10 26 51.03 +45 21 02.4 r 703
2007-03-13 04:59:38 C 10 26 49.99 +45 20 54.9 r 703
2007-03-13 19:46:19 C 10 24 37.72 +45 03 24.9 c 127
2007-03-13 19:54:18 C 10 24 36.51 +45 03 15.8 c 127
2007-03-13 22:52:06 C 10 24 09.24 +44 59 48.5 c A24
2007-03-13 23:07:27 C 10 24 06.90 +44 59 29.9 c A24
2007-03-13 23:22:52 C 10 24 04.55 +44 59 11.1 c A24
2007-03-13 23:38:30 C 10 24 02.17 +44 58 52.3 c A24
2007-03-13 23:54:29 C 10 23 59.74 +44 58 32.9 c A24
2007-03-14 00:10:14 C 10 23 57.34 +44 58 13.8 c A24
2007-03-14 00:25:47 C 10 23 54.98 +44 57 54.9 c A24
2007-03-14 00:37:32 C 10 23 53.18 +44 57 40.6 c A24
2007-03-14 00:38:57 C 10 23 52.97 +44 57 38.9 c A24
2007-03-14 00:51:33 C 10 23 51.06 +44 57 23.6 c A24
2007-03-14 01:03:25 C 10 23 49.25 +44 57 09.1 c A24
2007-03-14 01:14:57 C 10 23 47.51 +44 56 54.8 c A24
2007-03-14 01:16:22 C 10 23 47.30 +44 56 53.1 c A24
2007-03-14 01:28:58 C 10 23 45.38 +44 56 37.9 c A24
2007-03-14 01:40:51 C 10 23 43.60 +44 56 23.1 c A24
2007-03-14 01:52:23 C 10 23 41.86 +44 56 08.8 c A24
2007-03-14 01:53:49 C 10 23 41.68 +44 56 06.8 c A24
2007-03-14 02:07:59 C 10 23 39.51 +44 55 49.8 c A24
2007-03-14 02:26:47 C 10 23 36.66 +44 55 27.0 c A24
2007-03-14 21:33:25 C 10 20 54.29 +44 32 20.8 c 127
2007-03-14 21:38:31 C 10 20 53.53 +44 32 14.5 c 127
2007-03-14 21:43:48 C 10 20 52.76 +44 32 08.1 c 127
2007-03-14 22:52:50 C 10 20 42.53 +44 30 46.3 c A24
2007-03-14 23:09:46 C 10 20 40.07 +44 30 25.0 c A24
2007-03-14 23:45:18 C 10 20 34.91 +44 29 40.4 c A24
2007-03-15 00:02:26 C 10 20 32.40 +44 29 18.9 c A24
2007-03-15 00:13:55 C 10 20 30.74 +44 29 04.3 c A24
2007-03-15 00:15:22 C 10 20 30.50 +44 29 02.6 c A24
2007-03-15 00:27:34 C 10 20 28.76 +44 28 47.3 c A24
2007-03-15 00:41:13 C 10 20 26.76 +44 28 30.2 c A24
2007-03-15 00:53:24 C 10 20 25.01 +44 28 14.9 c A24
2007-03-15 00:54:51 C 10 20 24.78 +44 28 13.0 c A24
2007-03-15 01:06:20 C 10 20 23.14 +44 27 58.6 c A24
2007-03-15 01:19:16 C 10 20 21.28 +44 27 42.3 c A24
2007-03-15 01:26:04 C 10 20 20.371 +44 27 27.1 r 084
2007-03-15 01:30:44 C 10 20 19.60 +44 27 27.5 c A24
2007-03-15 01:32:10 C 10 20 19.42 +44 27 25.6 c A24
2007-03-15 22:30:59 C 10 17 28.37 +44 01 22.1 c A24
2007-03-15 23:03:17 C 10 17 23.86 +44 00 41.2 c A24
2007-03-15 23:10:52 C 10 17 22.81 +44 00 31.5 c A24
2007-03-15 23:12:21 C 10 17 22.63 +44 00 29.7 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)