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
2008-01-28 17:43:19 C 02 36 05.88 +76 52 13.3 o 084
2008-02-12 18:13:20 C 05 06 45.26 +68 39 21.7 r 106
2008-02-12 18:21:39 C 05 06 47.29 +68 39 07.6 r 106
2008-02-12 18:29:57 C 05 06 49.31 +68 38 54.7 r 106
2008-02-12 18:38:14 C 05 06 51.50 +68 38 41.0 r 106
2008-02-18 22:34:01 C 05 40 15.18 +64 36 24.2 o J51
2008-02-18 22:41:13 C 05 40 16.51 +64 36 12.0 o J51
2008-02-18 22:48:24 C 05 40 17.86 +64 35 59.5 o J51
2008-02-26 03:54:10 C 06 10 30.59 +59 54 21.4 18.4 c 704
2008-02-26 04:10:43 C 06 10 33.02 +59 53 54.8 18.5 c 704
2008-02-26 04:27:17 C 06 10 35.45 +59 53 28.0 18.4 c 704
2008-02-26 04:43:41 C 06 10 37.84 +59 53 00.8 18.6 c 704
2008-02-26 05:00:20 C 06 10 40.30 +59 52 33.7 18.7 c 704
2008-02-27 02:22:05 C 06 13 58.46 +59 18 24.9 17.9 c 704
2008-02-27 02:38:43 C 06 14 00.84 +59 17 59.4 18.0 c 704
2008-02-27 02:55:29 C 06 14 03.24 +59 17 32.1 18.0 c 704
2008-02-27 03:12:08 C 06 14 05.57 +59 17 05.3 17.8 c 704
2008-02-27 03:52:35 C 06 14 11.36 +59 16 00.9 17.8 c 704
2008-02-27 04:09:10 C 06 14 13.68 +59 15 34.3 18.3 c 704
2008-02-27 04:25:33 C 06 14 16.09 +59 15 07.4 18.1 c 704
2008-02-27 04:42:29 C 06 14 18.47 +59 14 40.5 18.2 c 704
2008-02-27 04:58:53 C 06 14 20.80 +59 14 13.6 18.0 c 704
2008-04-01 02:49:17 C 07 48 43.66 +40 06 00.5 r 703
2008-04-01 02:59:42 C 07 48 44.64 +40 05 48.7 r 703
2008-04-01 03:09:25 C 07 48 45.57 +40 05 36.5 r 703
2008-04-01 03:19:08 C 07 48 46.47 +40 05 24.1 r 703
2008-04-11 03:05:02 C 08 11 35.37 +35 20 59.0 18.8 c 704
2008-04-11 03:37:07 C 08 11 38.08 +35 20 22.2 19.3 c 704
2008-04-11 03:53:01 C 08 11 39.77 +35 20 02.4 19.5 c 704
2008-04-11 04:08:48 C 08 11 41.06 +35 19 43.2 19.8 c 704
2008-04-16 03:35:38 C 08 22 42.88 +33 05 00.1 r 703
2008-04-16 03:48:14 C 08 22 44.07 +33 04 44.4 r 703
2008-04-16 04:00:48 C 08 22 45.19 +33 04 31.5 r 703
2008-04-16 04:13:27 C 08 22 46.23 +33 04 16.5 r 703
2008-12-21 02:00:35 C 21 52 19.84 +01 58 14.4 r 703
2008-12-21 02:09:21 C 21 52 21.39 +01 58 35.7 r 703
2008-12-21 02:18:00 C 21 52 22.94 +01 58 58.0 r 703
2008-12-21 02:26:31 C 21 52 24.42 +01 59 19.7 r 703
2008-12-22 01:39:56 C 21 56 36.74 +02 58 10.4 r 703
2008-12-22 01:55:42 C 21 56 39.48 +02 58 50.0 r 703
2008-12-22 02:03:40 C 21 56 40.95 +02 59 09.9 r 703
2009-01-02 17:21:31 C 22 47 53.89 +14 42 05.7 r B60
2009-01-02 17:30:53 C 22 47 55.63 +14 42 28.3 r B60
2009-01-02 17:39:50 C 22 47 57.33 +14 42 49.5 r B60
2009-01-14 01:24:23 C 23 40 33.94 +25 07 39.6 r H53
2009-01-14 01:31:47 C 23 40 35.27 +25 07 54.5 r H53
2009-01-14 01:36:19 C 23 40 36.36 +25 08 03.6 r H53
2009-01-14 01:39:19 C 23 40 36.83 +25 08 08.7 r H53
2009-01-14 01:56:49 C 23 40 40.26 +25 08 46.8 r H53
2009-01-14 02:02:55 C 23 40 41.42 +25 08 58.5 r H53
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)