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
2025-03-29 05:45:20 C 07 14 50.561 +41 50 59.57 V T05
2025-03-29 05:52:33 C 07 14 51.398 +41 50 51.54 V T05
2025-03-29 06:02:28 C 07 14 52.670 +41 50 40.27 V T08
2025-03-29 06:08:45 C 07 14 53.369 +41 50 33.47 V T08
2025-03-30 04:11:16 C 07 17 37.756 +41 26 06.76 V 703
2025-03-30 04:14:20 C 07 17 38.051 +41 26 03.59 V 703
2025-03-30 04:17:24 C 07 17 38.504 +41 26 00.20 V 703
2025-03-30 05:38:28 C 07 17 48.931 +41 24 33.23 V T08
2025-03-30 05:43:10 C 07 17 49.447 +41 24 27.68 V T08
2025-03-30 05:58:14 C 07 17 51.262 +41 24 11.41 V T08
2025-03-30 06:04:14 C 07 17 51.982 +41 24 05.33 V T08
2025-03-31 05:40:12 C 07 20 46.392 +40 58 03.18 V T05
2025-03-31 05:47:18 C 07 20 47.170 +40 57 55.73 V T05
2025-03-31 06:01:18 C 07 20 48.847 +40 57 39.96 V T05
2025-03-31 06:04:40 C 07 20 49.298 +40 57 36.76 V T05
2025-04-01 06:18:43 C 07 23 46.327 +40 30 58.28 V T05
2025-04-01 06:25:33 C 07 23 47.100 +40 30 50.40 V T05
2025-04-01 06:34:18 C 07 23 48.192 +40 30 41.58 V T05
2025-04-01 06:39:32 C 07 23 48.758 +40 30 34.38 V T05
2025-04-18 03:01:47 C 08 09 20.297 +33 21 04.39 V G96
2025-04-18 03:09:19 C 08 09 21.060 +33 20 56.87 V G96
2025-04-18 03:16:49 C 08 09 21.841 +33 20 49.20 V G96
2025-04-18 03:24:19 C 08 09 22.615 +33 20 42.22 V G96
2025-04-21 04:33:50 C 08 17 01.000 +32 05 45.42 V 703
2025-04-21 04:37:04 C 08 17 01.388 +32 05 41.24 V 703
2025-04-21 04:40:18 C 08 17 01.691 +32 05 37.57 V 703
2025-04-21 04:43:33 C 08 17 02.155 +32 05 34.80 V 703
2025-12-19 18:43:32 B 21 41 17.638 -05 10 07.18 q Y84
2025-12-19 18:53:14 B 21 41 19.301 -05 09 45.47 q Y84
2025-12-19 18:59:43 B 21 41 20.410 -05 09 31.18 q Y84
2026-01-10 05:07:17 C 23 15 02.719 +14 30 28.73 V T05
2026-01-10 05:13:15 C 23 15 03.809 +14 30 41.98 V T05
2026-01-10 05:21:58 C 23 15 05.467 +14 31 01.63 V T05
2026-01-10 05:38:01 C 23 15 08.316 +14 31 36.26 V T05
2026-01-11 06:02:34 C 23 19 41.290 +15 25 12.43 V T05
2026-01-11 06:07:13 C 23 19 42.132 +15 25 22.30 V T05
2026-01-11 06:15:11 C 23 19 43.632 +15 25 39.00 V T05
2026-01-11 06:35:37 C 23 19 47.362 +15 26 24.32 V T05
2026-01-14 02:23:01 C 23 32 32.456 +17 52 18.41 V 703
2026-01-14 02:26:19 C 23 32 33.068 +17 52 24.20 V 703
2026-01-14 02:29:34 C 23 32 33.742 +17 52 31.73 V 703
2026-01-14 02:32:50 C 23 32 34.321 +17 52 38.21 V 703
2026-01-16 05:41:29 C 23 42 18.470 +19 39 39.06 V T05
2026-01-16 05:46:04 C 23 42 19.397 +19 39 48.35 V T05
2026-01-16 05:55:18 C 23 42 21.101 +19 40 07.32 V T05
2026-01-16 06:10:23 C 23 42 23.904 +19 40 37.78 V T05
2026-01-17 02:26:09 C 23 46 17.472 +20 22 09.23 V 703
2026-01-17 02:29:26 C 23 46 18.109 +20 22 15.10 V 703
2026-01-17 02:32:42 C 23 46 18.736 +20 22 22.22 V 703
2026-01-17 02:35:59 C 23 46 19.376 +20 22 28.63 V 703
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)