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
2007-03-15 23:27:12 C 10 17 20.53 +44 00 10.7 c A24
2007-03-15 23:43:33 C 10 17 18.25 +43 59 50.0 c A24
2007-03-15 23:58:25 C 10 17 16.15 +43 59 31.0 c A24
2007-03-15 23:59:53 C 10 17 15.97 +43 59 29.1 c A24
2007-03-16 00:08:53 C 10 17 14.69 +43 59 17.9 c A24
2007-03-16 22:42:37 C 10 14 18.85 +43 30 33.1 c A24
2007-03-16 23:04:57 C 10 14 15.92 +43 30 04.4 c A24
2007-03-16 23:06:25 C 10 14 15.67 +43 30 01.7 c A24
2007-03-16 23:19:34 C 10 14 13.95 +43 29 44.7 c A24
2007-03-16 23:34:11 C 10 14 12.00 +43 29 25.6 c A24
2007-03-16 23:47:22 C 10 14 10.23 +43 29 08.1 c A24
2007-03-16 23:48:49 C 10 14 10.09 +43 29 06.7 c A24
2007-03-17 00:01:15 C 10 14 08.39 +43 28 49.8 c A24
2007-03-17 00:15:08 C 10 14 06.59 +43 28 31.8 c A24
2007-03-17 00:27:33 C 10 14 04.94 +43 28 14.8 c A24
2007-03-17 00:29:00 C 10 14 04.78 +43 28 13.6 c A24
2007-03-17 00:41:12 C 10 14 03.18 +43 27 57.3 c A24
2007-03-17 06:44:21 C 10 13 17.48 +43 20 11.5 r H45
2007-03-17 06:46:04 C 10 13 17.26 +43 20 09.4 r H45
2007-03-17 06:47:28 C 10 13 17.06 +43 20 07.5 r H45
2007-03-17 06:48:57 C 10 13 16.89 +43 20 05.5 r H45
2007-03-17 06:50:59 C 10 13 16.66 +43 20 02.8 r H45
2007-03-18 05:30:22 C 10 10 31.83 +42 50 24.6 r 703
2007-03-18 05:39:52 C 10 10 30.61 +42 50 12.3 r 703
2007-03-18 05:49:26 C 10 10 29.42 +42 49 59.6 r 703
2007-03-18 05:59:26 C 10 10 28.20 +42 49 45.9 r 703
2007-03-21 22:13:50 C 10 01 00.24 +40 49 39.6 r 168
2007-03-21 22:19:05 C 10 00 59.70 +40 49 31.9 r 168
2007-03-21 22:22:46 C 10 00 59.33 +40 49 27.3 r 168
2007-03-21 22:25:55 C 10 00 59.04 +40 49 22.7 r 168
2007-03-21 22:27:52 C 10 00 58.84 +40 49 19.6 r 168
2007-03-21 23:37:00 C 10 00 52.12 +40 47 41.7 r 168
2007-03-25 01:53:43 C 09 54 28.413 +39 03 17.3 r 084
2007-03-25 01:56:53 C 09 54 28.146 +39 03 12.5 r 084
2007-03-25 07:41:00 C 09 54 01.51 +38 55 16.2 r H45
2007-03-25 07:41:54 C 09 54 01.41 +38 55 14.9 r H45
2007-03-25 07:43:55 C 09 54 01.23 +38 55 11.8 r H45
2007-03-25 07:45:19 C 09 54 01.14 +38 55 09.3 r H45
2007-03-25 07:46:26 C 09 54 01.05 +38 55 07.8 r H45
2007-03-26 19:14:26 C 09 51 29.626 +38 04 38.6 r 084
2007-03-26 19:17:36 C 09 51 29.399 +38 04 34.2 r 084
2007-03-29 00:54:43 C 09 48 09.003 +36 48 04.7 r 084
2007-03-29 00:57:52 C 09 48 08.803 +36 47 59.9 r 084
2007-03-31 21:17:44 C 09 44 45.817 +35 11 00.9 r 084
2007-04-01 06:06:50 C 09 44 23.46 +34 58 41.2 o 644
2007-04-01 06:38:25 C 09 44 21.98 +34 57 56.1 o 644
2007-04-01 07:09:57 C 09 44 20.53 +34 57 11.0 o 644
2007-04-05 22:11:34 C 09 40 48.855 +32 21 54.8 r 084
2007-04-05 22:14:44 C 09 40 48.783 +32 21 50.4 r 084
2007-04-06 19:08:05 C 09 40 22.89 +31 53 13.1 o 434
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)