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
2007-02-23 00:45:50 C 11 51 02.08 +49 57 22.4 c A24
2007-02-23 01:12:38 C 11 50 56.20 +49 57 22.7 c A24
2007-02-23 01:14:05 C 11 50 55.94 +49 57 22.6 c A24
2007-02-24 02:51:07 C 11 45 33.43 +49 56 11.9 16.7 o 084
2007-02-24 02:54:16 C 11 45 32.71 +49 56 11.7 16.7 o 084
2007-02-25 08:50:07 C 11 39 15.65 +49 52 42.5 c 670
2007-02-25 08:58:41 C 11 39 13.79 +49 52 40.8 c 670
2007-02-25 11:47:54 C 11 38 36.49 +49 52 07.8 c 670
2007-02-25 11:55:05 C 11 38 34.95 +49 52 06.1 c 670
2007-02-26 03:29:35 C 11 35 17.68 +49 48 42.4 16.7 o 084
2007-02-26 07:52:41 C 11 34 23.62 +49 47 58.0 17.0 c 704
2007-02-26 08:08:33 C 11 34 20.16 +49 47 54.7 17.1 c 704
2007-02-26 08:24:25 C 11 34 16.55 +49 47 51.1 16.9 c 704
2007-02-26 08:40:17 C 11 34 13.15 +49 47 47.6 17.4 c 704
2007-02-26 08:56:16 C 11 34 09.57 +49 47 42.7 17.2 c 704
2007-02-26 20:09:16 C 11 31 49.314 +49 44 31.62 c A30
2007-02-26 20:10:58 C 11 31 48.951 +49 44 31.24 c A30
2007-02-26 20:12:40 C 11 31 48.584 +49 44 30.91 c A30
2007-02-26 20:14:21 C 11 31 48.220 +49 44 30.47 c A30
2007-02-26 20:16:03 C 11 31 47.859 +49 44 30.10 c A30
2007-02-27 05:50:08 C 11 29 46.52 +49 41 48.1 o 699
2007-02-27 06:14:03 C 11 29 41.25 +49 41 41.7 o 699
2007-02-27 06:37:52 C 11 29 36.07 +49 41 35.2 o 699
2007-02-27 07:02:32 C 11 29 30.66 +49 41 28.0 o 699
2007-03-03 10:01:17 C 11 08 56.29 +48 55 16.4 r H45
2007-03-03 10:02:46 C 11 08 55.97 +48 55 15.4 r H45
2007-03-03 10:06:19 C 11 08 55.24 +48 55 13.1 r H45
2007-03-03 10:12:17 C 11 08 54.00 +48 55 09.0 r H45
2007-03-03 10:14:40 C 11 08 53.50 +48 55 07.1 r H45
2007-03-08 06:48:17 C 10 46 30.04 +47 24 59.9 17.4 c 704
2007-03-08 07:04:22 C 10 46 26.97 +47 24 44.5 17.4 c 704
2007-03-08 07:20:25 C 10 46 24.01 +47 24 30.1 17.7 c 704
2007-03-08 07:26:23 C 10 46 22.35 +47 24 22.1 r H45
2007-03-08 07:27:38 C 10 46 22.11 +47 24 21.4 r H45
2007-03-08 07:29:10 C 10 46 21.83 +47 24 19.9 r H45
2007-03-08 07:31:21 C 10 46 21.43 +47 24 17.6 r H45
2007-03-08 07:34:45 C 10 46 20.80 +47 24 14.8 r H45
2007-03-08 07:36:52 C 10 46 20.87 +47 24 15.7 17.4 c 704
2007-03-12 00:45:36 C 10 31 11.28 +45 52 56.8 c A24
2007-03-12 00:47:02 C 10 31 11.03 +45 52 54.8 c A24
2007-03-12 01:24:47 C 10 31 04.85 +45 52 11.6 c A24
2007-03-12 01:26:13 C 10 31 04.59 +45 52 10.4 c A24
2007-03-12 02:04:24 C 10 30 58.35 +45 51 26.1 c A24
2007-03-12 02:05:51 C 10 30 58.11 +45 51 24.4 c A24
2007-03-12 20:24:46 C 10 28 08.70 +45 30 42.0 c 127
2007-03-12 20:31:47 C 10 28 07.57 +45 30 33.9 c 127
2007-03-12 20:37:52 C 10 28 06.60 +45 30 27.2 c 127
2007-03-13 00:31:07 C 10 27 29.34 +45 26 00.2 c A24
2007-03-13 00:32:34 C 10 27 29.12 +45 25 58.5 c A24
2007-03-13 01:11:37 C 10 27 22.92 +45 25 12.3 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)