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
2007-01-25 04:07:36 C 13 21 37.83 +42 50 56.6 17.2 r 084
2007-01-25 04:11:46 C 13 21 37.57 +42 51 00.1 17.0 r 084
2007-01-25 09:05:55 C 13 21 26.12 +42 55 05.3 17.1 c 704
2007-01-25 09:22:58 C 13 21 25.28 +42 55 19.4 17.1 c 704
2007-01-25 09:40:05 C 13 21 24.35 +42 55 33.9 17.4 c 704
2007-01-25 09:58:13 C 13 21 23.44 +42 55 49.3 17.5 c 704
2007-01-25 10:15:49 C 13 21 22.54 +42 56 04.4 17.4 c 704
2007-01-27 01:25:41 C 13 19 26.00 +43 27 50.1 c A24
2007-01-27 01:27:09 C 13 19 25.94 +43 27 51.1 c A24
2007-01-27 01:43:44 C 13 19 24.94 +43 28 05.4 c A24
2007-01-27 02:01:18 C 13 19 23.91 +43 28 20.2 c A24
2007-01-27 02:18:22 C 13 19 22.89 +43 28 34.7 c A24
2007-01-27 02:19:50 C 13 19 22.82 +43 28 35.9 c A24
2007-01-29 00:04:52 C 13 16 40.52 +44 06 12.6 c A24
2007-01-29 00:06:20 C 13 16 40.42 +44 06 13.8 c A24
2007-01-30 00:03:59 C 13 15 03.45 +44 26 04.8 c A24
2007-01-30 00:05:27 C 13 15 03.33 +44 26 06.0 c A24
2007-01-31 04:47:46 C 13 12 54.11 +44 49 52.1 17.2 r 084
2007-01-31 04:50:55 C 13 12 53.86 +44 49 54.6 16.7 r 084
2007-01-31 21:02:14 C 13 11 38.49 +45 03 12.6 16.9 r 084
2007-02-04 22:40:14 C 13 02 26.90 +46 22 52.6 c A24
2007-02-04 22:41:40 C 13 02 26.81 +46 22 52.4 c A24
2007-02-04 22:56:38 C 13 02 25.12 +46 23 05.7 c A24
2007-02-04 23:13:03 C 13 02 23.34 +46 23 19.1 c A24
2007-02-04 23:16:25 C 13 02 22.91 +46 23 22.3 c A24
2007-02-04 23:28:01 C 13 02 21.73 +46 23 32.5 c A24
2007-02-04 23:29:29 C 13 02 21.56 +46 23 33.9 c A24
2007-02-04 23:41:02 C 13 02 20.25 +46 23 42.6 c A24
2007-02-04 23:44:25 C 13 02 19.90 +46 23 46.1 c A24
2007-02-05 00:00:49 C 13 02 18.08 +46 23 59.7 c A24
2007-02-05 00:15:45 C 13 02 16.37 +46 24 12.7 c A24
2007-02-05 00:17:12 C 13 02 16.27 +46 24 13.5 c A24
2007-02-07 10:14:45 C 12 55 32.66 +47 09 23.1 r 703
2007-02-07 10:21:02 C 12 55 31.80 +47 09 28.1 r 703
2007-02-07 10:27:14 C 12 55 30.97 +47 09 33.1 r 703
2007-02-07 10:33:29 C 12 55 30.14 +47 09 37.7 r 703
2007-02-08 08:18:08 C 12 52 45.19 +47 25 46.2 17.4 c 704
2007-02-08 08:34:37 C 12 52 42.95 +47 25 57.5 17.2 c 704
2007-02-08 08:51:28 C 12 52 40.66 +47 26 12.3 17.6 c 704
2007-02-08 09:08:04 C 12 52 38.32 +47 26 24.1 17.2 c 704
2007-02-10 02:35:38 C 12 46 57.91 +47 55 44.3 16.9 r 084
2007-02-14 00:33:20 C 12 32 24.02 +48 54 04.6 c A24
2007-02-14 00:34:47 C 12 32 23.79 +48 54 05.3 c A24
2007-02-15 22:58:28 C 12 24 20.44 +49 17 05.5 c A24
2007-02-15 22:59:57 C 12 24 20.17 +49 17 06.3 c A24
2007-02-15 23:28:08 C 12 24 15.01 +49 17 20.3 c A24
2007-02-15 23:51:21 C 12 24 10.66 +49 17 31.5 c A24
2007-02-15 23:56:37 C 12 24 09.69 +49 17 33.9 c A24
2007-02-16 23:28:33 C 12 19 52.15 +49 27 27.1 c A24
2007-02-16 23:30:01 C 12 19 51.88 +49 27 27.9 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)