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
2007-04-17 19:50:12 C 09 39 38.20 +26 05 22.6 c A24
2007-04-17 20:06:59 C 09 39 38.34 +26 05 01.6 c A24
2007-04-17 20:23:47 C 09 39 38.47 +26 04 41.1 c A24
2007-04-17 20:39:10 C 09 39 38.63 +26 04 21.4 c A24
2007-04-17 20:56:00 C 09 39 38.78 +26 04 00.0 c A24
2007-04-17 21:11:23 C 09 39 38.93 +26 03 40.1 c A24
2007-04-17 21:12:49 C 09 39 38.92 +26 03 38.6 c A24
2007-04-18 19:28:21 C 09 39 56.87 +25 35 49.6 c A24
2007-04-18 19:29:49 C 09 39 56.91 +25 35 47.9 c A24
2007-04-18 19:45:16 C 09 39 57.06 +25 35 28.5 c A24
2007-04-18 20:02:11 C 09 39 57.25 +25 35 07.3 c A24
2007-04-18 20:17:37 C 09 39 57.43 +25 34 48.0 c A24
2007-04-18 20:19:04 C 09 39 57.42 +25 34 46.0 c A24
2007-04-18 20:34:33 C 09 39 57.60 +25 34 26.6 c A24
2007-04-18 20:51:30 C 09 39 57.78 +25 34 05.5 c A24
2007-04-18 21:06:59 C 09 39 57.96 +25 33 46.0 c A24
2007-04-18 21:08:26 C 09 39 57.98 +25 33 44.3 c A24
2007-04-19 20:04:16 C 09 40 19.42 +25 05 20.0 c A24
2007-04-19 20:05:41 C 09 40 19.51 +25 05 18.1 c A24
2007-04-19 20:54:29 C 09 40 19.97 +25 04 17.0 c A24
2007-04-20 19:36:59 C 09 40 44.26 +24 36 23.7 c A24
2007-04-20 19:38:25 C 09 40 44.22 +24 36 22.1 c A24
2007-04-20 19:59:43 C 09 40 44.58 +24 35 55.9 c A24
2007-04-20 20:22:25 C 09 40 44.92 +24 35 28.2 c A24
2007-04-20 20:43:42 C 09 40 45.29 +24 35 01.7 c A24
2007-04-20 20:45:07 C 09 40 45.31 +24 35 00.5 c A24
2007-04-20 21:01:03 C 09 40 45.55 +24 34 40.5 c A24
2007-04-20 21:18:25 C 09 40 45.81 +24 34 19.4 c A24
2007-04-20 21:34:20 C 09 40 46.06 +24 33 59.5 c A24
2007-04-20 21:35:45 C 09 40 46.10 +24 33 58.2 c A24
2007-04-22 19:56:02 C 09 41 43.86 +23 37 46.4 c A24
2007-04-22 20:31:01 C 09 41 44.53 +23 37 05.1 c A24
2007-04-22 20:33:57 C 09 41 44.58 +23 37 00.9 c A24
2007-04-22 21:10:08 C 09 41 45.32 +23 36 17.1 c A24
2007-05-11 03:39:46 C 09 57 46.36 +15 24 51.6 o 699
2007-05-11 04:00:50 C 09 57 47.34 +15 24 29.2 o 699
2007-05-11 04:21:54 C 09 57 48.28 +15 24 06.6 o 699
2007-05-11 04:42:58 C 09 57 49.28 +15 23 44.1 o 699
2007-12-04 19:53:56 C 19 05 18.55 +25 44 23.1 r J46
2007-12-04 19:59:29 C 19 05 19.02 +25 44 48.5 r J46
2007-12-20 16:26:44 C 19 47 19.74 +51 20 22.1 o 084
2007-12-20 16:28:57 C 19 47 20.06 +51 20 29.8 o 084
2008-01-06 15:07:47 C 21 12 40.28 +69 50 49.5 o 084
2008-01-06 15:10:00 C 21 12 41.00 +69 50 54.1 o 084
2008-01-27 03:10:43 C 02 10 28.81 +77 20 54.5 r H45
2008-01-27 03:12:14 C 02 10 29.84 +77 20 53.2 r H45
2008-01-27 03:15:01 C 02 10 31.65 +77 20 51.2 r H45
2008-01-27 03:16:12 C 02 10 32.36 +77 20 50.9 r H45
2008-01-27 03:18:00 C 02 10 33.74 +77 20 49.2 r H45
2008-01-28 17:41:06 C 02 36 04.53 +76 52 15.0 o 084
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)