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
2007-02-16 23:48:02 C 12 19 48.36 +49 27 35.4 c A24
2007-02-17 00:05:20 C 12 19 45.05 +49 27 42.2 c A24
2007-02-17 00:22:16 C 12 19 41.81 +49 27 50.0 c A24
2007-02-17 00:23:44 C 12 19 41.54 +49 27 50.7 c A24
2007-02-17 00:41:39 C 12 19 38.06 +49 27 57.8 c A24
2007-02-17 00:58:51 C 12 19 34.76 +49 28 05.1 c A24
2007-02-17 01:15:41 C 12 19 31.49 +49 28 11.6 c A24
2007-02-17 01:17:09 C 12 19 31.22 +49 28 12.3 c A24
2007-02-18 21:54:22 C 12 11 03.17 +49 43 04.8 c A24
2007-02-18 21:55:53 C 12 11 02.82 +49 43 05.5 c A24
2007-02-18 22:16:07 C 12 10 58.83 +49 43 11.9 c A24
2007-02-18 22:35:30 C 12 10 54.99 +49 43 17.9 c A24
2007-02-18 22:54:32 C 12 10 51.19 +49 43 25.5 c A24
2007-02-18 22:56:06 C 12 10 50.80 +49 43 24.5 c A24
2007-02-18 23:21:40 C 12 10 45.59 +49 43 32.8 c A24
2007-02-19 21:53:15 C 12 06 19.98 +49 49 02.7 c A24
2007-02-19 22:38:28 C 12 06 10.71 +49 49 14.2 c A24
2007-02-19 22:59:34 C 12 06 06.38 +49 49 19.4 c A24
2007-02-19 23:18:26 C 12 06 02.53 +49 49 24.1 c A24
2007-02-19 23:20:02 C 12 06 02.19 +49 49 24.5 c A24
2007-02-19 23:37:39 C 12 05 58.58 +49 49 29.0 c A24
2007-02-19 23:55:50 C 12 05 54.84 +49 49 33.0 c A24
2007-02-20 00:13:00 C 12 05 51.28 +49 49 37.2 c A24
2007-02-20 00:14:28 C 12 05 50.96 +49 49 37.4 c A24
2007-02-20 00:32:08 C 12 05 47.32 +49 49 41.4 c A24
2007-02-20 00:50:17 C 12 05 43.57 +49 49 45.7 c A24
2007-02-20 01:07:26 C 12 05 39.99 +49 49 49.1 c A24
2007-02-20 01:08:55 C 12 05 39.67 +49 49 49.5 c A24
2007-02-20 02:29:31 C 12 05 22.63 +49 49 58.1 16.5 o 084
2007-02-20 02:32:41 C 12 05 22.00 +49 49 58.7 16.6 o 084
2007-02-20 21:55:27 C 12 01 30.48 +49 53 27.1 c A24
2007-02-20 21:56:55 C 12 01 30.20 +49 53 26.8 c A24
2007-02-20 22:15:38 C 12 01 26.29 +49 53 30.2 c A24
2007-02-20 22:33:40 C 12 01 22.57 +49 53 33.6 c A24
2007-02-20 22:51:18 C 12 01 18.83 +49 53 37.4 c A24
2007-02-20 22:52:46 C 12 01 18.57 +49 53 37.4 c A24
2007-02-20 23:11:40 C 12 01 14.60 +49 53 40.8 c A24
2007-02-20 23:29:50 C 12 01 10.83 +49 53 43.9 c A24
2007-02-20 23:47:36 C 12 01 07.03 +49 53 47.0 c A24
2007-02-20 23:49:07 C 12 01 06.70 +49 53 47.4 c A24
2007-02-21 09:44:36 C 11 59 03.93 +49 55 08.5 r H45
2007-02-21 09:45:48 C 11 59 03.69 +49 55 09.1 r H45
2007-02-21 09:47:05 C 11 59 03.41 +49 55 09.2 r H45
2007-02-21 09:49:31 C 11 59 02.90 +49 55 09.4 r H45
2007-02-21 09:50:37 C 11 59 02.67 +49 55 09.3 r H45
2007-02-22 23:28:31 C 11 51 18.81 +49 57 22.1 c A24
2007-02-22 23:43:22 C 11 51 15.60 +49 57 22.2 c A24
2007-02-22 23:58:49 C 11 51 12.25 +49 57 22.2 c A24
2007-02-23 00:18:59 C 11 51 07.87 +49 57 22.4 c A24
2007-02-23 00:29:45 C 11 51 05.57 +49 57 22.5 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)