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
2023-12-07 15:01:34 C 13 14 48.384 +39 16 39.14 V T08
2023-12-07 15:17:11 C 13 14 48.989 +39 16 50.20 V T08
2023-12-08 15:14:03 C 13 15 51.691 +39 32 30.48 V T05
2023-12-08 15:21:53 C 13 15 51.989 +39 32 36.10 V T05
2023-12-08 15:43:36 C 13 15 52.788 +39 32 51.40 V T05
2023-12-08 15:54:55 C 13 15 53.196 +39 32 59.17 V T05
2023-12-15 15:11:50 C 13 22 52.082 +41 19 19.92 V T08
2023-12-15 15:19:24 C 13 22 52.339 +41 19 25.54 V T08
2023-12-15 15:38:39 C 13 22 52.946 +41 19 38.42 V T08
2023-12-15 15:45:31 C 13 22 53.160 +41 19 43.14 V T08
2023-12-17 14:34:17 C 13 24 40.596 +41 49 19.92 V T05
2023-12-17 14:56:34 C 13 24 41.263 +41 49 35.47 V T05
2023-12-17 15:02:32 C 13 24 41.477 +41 49 39.94 V T05
2023-12-17 15:12:23 C 13 24 41.717 +41 49 46.02 V T05
2023-12-20 05:36:43 S 13 26 52.53 +42 29 50.7 L C51
2023-12-20 08:42:39 S 13 26 58.80 +42 31 51.1 L C51
2023-12-20 11:48:02 S 13 27 04.93 +42 33 50.6 L C51
2023-12-20 14:54:31 S 13 27 11.17 +42 35 52.7 L C51
2023-12-20 14:54:42 S 13 27 11.18 +42 35 53.9 L C51
2023-12-20 16:27:40 S 13 27 14.27 +42 36 53.9 L C51
2023-12-20 18:00:38 S 13 27 17.30 +42 37 55.4 L C51
2023-12-20 19:33:36 S 13 27 20.33 +42 38 55.8 L C51
2023-12-20 21:06:34 S 13 27 23.45 +42 39 56.1 L C51
2023-12-20 22:39:32 S 13 27 26.51 +42 40 56.7 L C51
2023-12-21 00:12:30 S 13 27 29.49 +42 41 57.3 L C51
2023-12-21 01:45:28 S 13 27 32.56 +42 42 58.5 L C51
2023-12-21 04:51:24 S 13 27 38.62 +42 44 59.6 L C51
2023-12-21 11:02:32 S 13 27 50.51 +42 49 01.5 L C51
2023-12-25 14:03:16 C 13 30 42.974 +43 55 35.26 V T05
2023-12-25 14:14:51 C 13 30 43.193 +43 55 44.15 V T05
2023-12-25 14:19:06 C 13 30 43.294 +43 55 47.17 V T05
2023-12-25 14:35:11 C 13 30 43.577 +43 55 58.84 V T05
2023-12-27 12:59:01 C 13 31 48.638 +44 28 24.28 V T05
2023-12-27 13:06:36 C 13 31 48.754 +44 28 29.82 V T05
2023-12-27 13:11:10 C 13 31 48.854 +44 28 33.35 V T05
2023-12-27 13:21:50 C 13 31 49.027 +44 28 41.48 V T05
2023-12-28 13:07:03 C 13 32 17.827 +44 45 42.37 V T05
2023-12-28 13:29:17 C 13 32 18.130 +44 45 59.80 V T05
2023-12-28 13:33:22 C 13 32 18.211 +44 46 03.07 V T05
2023-12-28 13:56:42 C 13 32 18.528 +44 46 21.36 V T05
2023-12-29 14:29:15 C 13 32 44.604 +45 04 16.82 V T05
2023-12-29 14:33:48 C 13 32 44.674 +45 04 20.46 V T05
2023-12-29 14:55:36 C 13 32 44.868 +45 04 37.70 V T05
2023-12-29 15:04:48 C 13 32 44.959 +45 04 44.87 V T05
2023-12-30 14:54:49 C 13 33 07.122 +45 22 25.45 X F51
2023-12-30 15:07:05 C 13 33 07.201 +45 22 35.18 X F51
2023-12-30 15:19:15 C 13 33 07.267 +45 22 44.73 X F51
2023-12-31 12:00:36 C 13 33 24.641 +45 38 09.85 V T08
2023-12-31 12:09:56 C 13 33 24.761 +45 38 18.02 V T08
2023-12-31 12:19:00 C 13 33 24.869 +45 38 25.12 V T08
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)