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
2007-04-06 19:10:33 C 09 40 22.84 +31 53 10.2 o 434
2007-04-06 19:12:52 C 09 40 22.69 +31 53 08.7 o 434
2007-04-06 19:15:10 C 09 40 22.79 +31 53 04.6 o 434
2007-04-06 22:38:48 C 09 40 17.99 +31 48 23.8 c A24
2007-04-06 22:54:37 C 09 40 17.61 +31 48 01.7 c A24
2007-04-06 22:56:05 C 09 40 17.56 +31 48 00.0 c A24
2007-04-06 23:00:56 C 09 40 17.47 +31 47 53.1 c A24
2007-04-06 23:01:51 C 09 40 17.462 +31 47 45.9 r 084
2007-04-06 23:02:24 C 09 40 17.44 +31 47 50.9 c A24
2007-04-06 23:05:00 C 09 40 17.404 +31 47 42.3 r 084
2007-04-06 23:59:11 C 09 40 16.16 +31 46 31.9 c A24
2007-04-08 21:56:42 C 09 39 33.05 +30 44 04.9 c A24
2007-04-08 21:58:07 C 09 39 33.05 +30 44 03.1 c A24
2007-04-08 22:02:52 C 09 39 32.96 +30 43 56.6 c A24
2007-04-08 22:04:19 C 09 39 32.95 +30 43 54.9 c A24
2007-04-08 22:18:42 C 09 39 32.71 +30 43 35.1 c A24
2007-04-08 22:40:42 C 09 39 32.38 +30 43 05.2 c A24
2007-04-08 23:01:16 C 09 39 32.05 +30 42 37.0 c A24
2007-04-08 23:02:43 C 09 39 32.05 +30 42 35.2 c A24
2007-04-08 23:07:29 C 09 39 31.95 +30 42 27.6 c A24
2007-04-08 23:08:56 C 09 39 31.84 +30 42 26.2 c A24
2007-04-08 23:23:18 C 09 39 31.75 +30 42 07.0 c A24
2007-04-08 23:45:19 C 09 39 31.40 +30 41 36.9 c A24
2007-04-09 00:07:21 C 09 39 30.99 +30 41 06.7 c A24
2007-04-09 00:12:11 C 09 39 31.03 +30 40 58.7 c A24
2007-04-09 00:13:38 C 09 39 30.98 +30 40 57.4 c A24
2007-04-09 00:18:00 C 09 39 31.110 +30 40 46.1 r 084
2007-04-09 00:21:10 C 09 39 31.097 +30 40 42.0 r 084
2007-04-09 19:28:12 C 09 39 19.26 +30 15 07.2 r 240
2007-04-09 19:33:03 C 09 39 19.20 +30 15 00.2 r 240
2007-04-09 19:34:15 C 09 39 19.18 +30 14 58.8 r 240
2007-04-09 19:39:06 C 09 39 19.12 +30 14 52.8 r 240
2007-04-09 19:48:46 C 09 39 18.97 +30 14 39.2 r 240
2007-04-09 19:49:59 C 09 39 18.96 +30 14 37.6 r 240
2007-04-09 21:38:10 C 09 39 17.48 +30 12 13.2 c A24
2007-04-09 21:39:35 C 09 39 17.46 +30 12 10.8 c A24
2007-04-09 21:44:20 C 09 39 17.35 +30 12 05.1 c A24
2007-04-09 21:45:45 C 09 39 17.34 +30 12 03.9 c A24
2007-04-09 21:56:26 C 09 39 17.23 +30 11 48.3 c A24
2007-04-09 22:14:41 C 09 39 17.00 +30 11 23.6 c A24
2007-04-09 22:18:05 C 09 39 16.954 +30 11 14.1 r 084
2007-04-09 22:21:15 C 09 39 16.908 +30 11 10.0 r 084
2007-04-09 22:31:31 C 09 39 16.78 +30 11 00.9 c A24
2007-04-09 22:32:57 C 09 39 16.78 +30 10 59.1 c A24
2007-04-09 22:37:50 C 09 39 16.69 +30 10 52.4 c A24
2007-04-09 22:39:17 C 09 39 16.69 +30 10 50.9 c A24
2007-04-09 22:51:33 C 09 39 16.54 +30 10 33.8 c A24
2007-04-09 23:13:40 C 09 39 16.27 +30 10 03.9 c A24
2007-04-09 23:23:59 C 09 39 16.16 +30 09 49.9 c A24
2007-04-09 23:25:25 C 09 39 16.14 +30 09 47.7 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)