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
2006-04-21 19:52:55 C 11 15 12.21 +08 25 42.3 o 198
2006-04-21 19:54:40 C 11 15 12.03 +08 25 40.5 o 198
2006-04-22 04:32:38 C 11 14 19.73 +08 17 38.8 o 644
2006-04-22 05:02:04 C 11 14 16.61 +08 17 11.1 o 644
2006-04-22 05:46:21 C 11 14 11.91 +08 16 29.3 o 644
2006-04-22 22:26:56 C 11 12 33.31 +08 00 35.5 16.51 r 084
2006-04-22 22:29:03 C 11 12 33.11 +08 00 33.5 16.37 r 084
2006-04-23 05:47:00 C 11 11 51.26 +07 53 48.8 16.5 c 704
2006-04-23 06:02:02 C 11 11 49.75 +07 53 34.8 16.9 c 704
2006-04-23 06:17:31 C 11 11 48.20 +07 53 19.9 17.1 c 704
2006-04-23 06:48:16 C 11 11 45.11 +07 52 50.4 17.1 c 704
2006-04-23 20:21:10 C 11 10 29.60 +07 39 52.4 16.4 r 084
2006-04-23 20:23:17 C 11 10 29.40 +07 39 50.3 16.27 r 084
2006-04-24 05:14:42 C 11 09 40.78 +07 31 36.1 r G96
2006-04-24 05:32:49 C 11 09 39.02 +07 31 18.9 r G96
2006-04-24 05:41:59 C 11 09 38.16 +07 31 10.2 r G96
2006-04-24 05:57:20 C 11 09 36.64 +07 30 55.1 17.3 c 704
2006-04-24 06:12:48 C 11 09 35.17 +07 30 40.2 17.4 c 704
2006-04-24 06:28:11 C 11 09 33.69 +07 30 25.6 17.3 c 704
2006-04-24 06:43:35 C 11 09 32.22 +07 30 10.9 17.3 c 704
2006-04-24 06:59:17 C 11 09 30.73 +07 29 56.1 17.5 c 704
2006-04-24 12:08:11 C 11 09 03.79 +07 25 02.8 r 379
2006-04-24 12:22:33 C 11 09 02.46 +07 24 49.6 r 379
2006-04-24 22:13:00 C 11 08 09.88 +07 15 20.1 16.7 r 084
2006-04-24 22:15:07 C 11 08 09.67 +07 15 18.0 16.93 r 084
2006-04-25 06:31:14 C 11 07 26.59 +07 07 37.3 17.0 c 704
2006-04-25 06:47:50 C 11 07 25.09 +07 07 21.3 17.2 c 704
2006-04-25 07:03:27 C 11 07 23.73 +07 07 05.6 17.3 c 704
2006-04-25 07:20:58 C 11 07 22.13 +07 06 48.3 17.3 c 704
2006-04-25 07:37:28 C 11 07 20.65 +07 06 32.2 17.4 c 704
2006-04-25 21:19:48 C 11 06 12.45 +06 53 25.1 o J94
2006-04-25 21:44:29 C 11 06 10.28 +06 53 02.6 o J94
2006-04-25 22:04:18 C 11 06 08.53 +06 52 42.9 o J94
2006-04-26 04:51:23 C 11 05 35.01 +06 46 22.1 17.6 c 704
2006-04-26 05:06:10 C 11 05 33.73 +06 46 08.2 17.5 c 704
2006-04-26 05:21:00 C 11 05 32.43 +06 45 54.0 17.4 c 704
2006-04-26 05:35:53 C 11 05 31.15 +06 45 39.9 17.5 c 704
2006-04-26 20:10:31 C 11 04 21.41 +06 31 39.6 17.38 r 084
2006-04-26 20:12:39 C 11 04 21.25 +06 31 37.7 17.29 r 084
2006-04-27 03:18:05 C 11 03 48.61 +06 25 02.1 17.7 c 704
2006-04-27 03:33:13 C 11 03 47.34 +06 24 47.9 18.0 c 704
2006-04-27 03:47:48 C 11 03 46.12 +06 24 33.5 17.8 c 704
2006-04-27 04:02:31 C 11 03 44.88 +06 24 19.7 18.1 c 704
2006-04-27 04:17:32 C 11 03 43.69 +06 24 05.9 18.0 c 704
2006-04-27 20:48:39 C 11 02 28.42 +06 08 14.2 17.06 r 084
2006-04-27 20:50:46 C 11 02 28.26 +06 08 12.3 17.34 r 084
2006-04-27 21:14:36 C 11 02 27.02 +06 07 51.4 o J65
2006-04-28 05:45:57 C 11 01 48.89 +05 59 52.3 17.6 c 704
2006-04-28 06:02:29 C 11 01 47.58 +05 59 36.3 17.8 c 704
2006-04-28 06:18:21 C 11 01 46.37 +05 59 20.9 17.6 c 704
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)