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
2022-11-25 15:16:34 C 11 59 17.906 +23 18 40.72 V T08
2022-11-25 15:32:20 C 11 59 19.562 +23 18 36.36 V T08
2022-11-27 10:53:00 C 12 03 56.102 +23 06 27.22 V 703
2022-11-27 10:59:57 C 12 03 56.812 +23 06 25.99 V 703
2022-11-27 11:06:55 C 12 03 57.571 +23 06 24.30 V 703
2022-11-27 11:13:52 C 12 03 58.201 +23 06 23.47 V 703
2022-11-30 11:44:31 C 12 11 30.736 +22 46 04.19 V 703
2022-11-30 11:52:06 C 12 11 31.463 +22 46 01.42 V 703
2022-11-30 11:59:42 C 12 11 32.201 +22 45 59.54 V 703
2022-11-30 12:07:18 C 12 11 33.029 +22 45 58.07 V 703
2022-12-21 12:49:14 C 12 58 21.702 +20 35 18.60 V 703
2022-12-21 12:56:12 C 12 58 22.285 +20 35 16.51 V 703
2022-12-21 13:03:10 C 12 58 22.807 +20 35 14.89 V 703
2022-12-21 13:10:08 C 12 58 23.293 +20 35 11.98 V 703
2022-12-24 10:41:40 C 13 04 01.207 +20 20 49.96 V 703
2022-12-24 10:49:15 C 13 04 01.751 +20 20 48.08 V 703
2022-12-24 10:56:51 C 13 04 02.402 +20 20 47.69 V 703
2022-12-24 11:04:26 C 13 04 02.935 +20 20 45.35 V 703
2022-12-24 12:51:01 C 13 04 11.154 +20 20 25.87 V G96
2022-12-24 12:58:29 C 13 04 11.712 +20 20 24.36 V G96
2022-12-24 13:05:58 C 13 04 12.281 +20 20 22.88 V G96
2022-12-24 13:13:25 C 13 04 12.842 +20 20 21.44 V G96
2022-12-27 11:19:45 C 13 09 39.589 +20 07 13.33 V 703
2022-12-27 11:27:17 C 13 09 40.194 +20 07 11.71 V 703
2022-12-27 11:34:50 C 13 09 40.792 +20 07 10.49 V 703
2022-12-27 11:42:22 C 13 09 41.242 +20 07 10.06 V 703
2023-01-14 14:25:24 C 13 37 50.378 +19 21 44.46 V T05
2023-01-14 14:26:03 C 13 37 50.436 +19 21 44.39 V T05
2023-01-14 14:36:34 C 13 37 50.974 +19 21 44.21 V T05
2023-01-14 14:40:29 C 13 37 51.094 +19 21 44.32 V T05
2023-01-14 14:48:59 C 13 37 51.545 +19 21 44.42 V T05
2023-01-21 10:29:43 C 13 45 28.242 +19 24 00.07 V 703
2023-01-21 10:37:23 C 13 45 28.523 +19 24 00.68 V 703
2023-01-21 10:45:02 C 13 45 28.782 +19 24 00.65 V 703
2023-01-21 10:52:41 C 13 45 29.066 +19 24 01.44 V 703
2023-01-22 13:49:25 C 13 46 32.599 +19 25 38.60 V T05
2023-01-22 13:52:01 C 13 46 32.695 +19 25 38.53 V T05
2023-01-22 14:04:01 C 13 46 33.094 +19 25 39.61 V T05
2023-01-22 14:06:37 C 13 46 33.151 +19 25 39.36 V T05
2023-01-22 14:11:50 C 13 46 33.384 +19 25 40.22 V T05
2023-01-22 14:22:15 C 13 46 33.734 +19 25 40.91 V T05
2023-01-25 14:35:27 C 13 49 05.496 +19 31 35.44 V T05
2023-01-25 14:39:32 C 13 49 05.597 +19 31 35.80 V T05
2023-01-25 14:44:06 C 13 49 05.707 +19 31 35.98 V T05
2023-01-25 14:52:07 C 13 49 05.942 +19 31 37.06 V T05
2023-02-03 10:42:31 C 13 53 41.773 +20 03 04.75 V G96
2023-02-03 10:50:37 C 13 53 41.820 +20 03 06.37 V G96
2023-02-03 10:58:45 C 13 53 41.881 +20 03 08.14 V G96
2023-02-03 11:06:53 C 13 53 41.924 +20 03 09.79 V G96
2023-02-13 01:03:24 C 13 52 49.790 +21 01 14.70 V M22
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)