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
2024-02-25 01:55:02 S 10 33 29.465 +57 33 26.14 V C57
2024-02-25 01:55:02 s 1 -64079.802 0 +152887.06 0.83 C57
2024-02-25 02:15:02 S 10 33 23.938 +57 33 09.90 V C57
2024-02-25 02:15:02 s 1 -65022.868 0 +151369.75 0.998 C57
2024-02-25 02:35:02 S 10 33 18.785 +57 32 53.41 V C57
2024-02-25 02:35:02 s 1 -65961.582 0 +149842.20 0.039 C57
2024-02-25 02:55:02 S 10 33 13.306 +57 32 35.05 V C57
2024-02-25 02:55:02 s 1 -66895.803 0 +148304.32 0.793 C57
2024-02-25 03:15:02 S 10 33 07.925 +57 32 15.50 V C57
2024-02-25 03:15:02 s 1 -67825.444 0 +146756.18 0.194 C57
2024-02-25 03:35:02 S 10 33 02.443 +57 31 58.51 V C57
2024-02-25 03:35:02 s 1 -68750.409 0 +145197.81 0.17 C57
2024-02-25 03:55:02 S 10 32 57.319 +57 31 42.42 V C57
2024-02-25 03:55:02 s 1 -69670.551 0 +143629.14 0.553 C57
2024-02-25 04:15:02 S 10 32 51.670 +57 31 23.59 V C57
2024-02-25 04:15:02 s 1 -70585.777 0 +142050.24 0.28 C57
2024-02-25 04:35:02 S 10 32 46.087 +57 31 05.74 V C57
2024-02-25 04:35:02 s 1 -71495.991 0 +140461.15 0.275 C57
2024-02-25 04:55:02 S 10 32 40.879 +57 30 48.42 V C57
2024-02-25 04:55:02 s 1 -72401.036 0 +138861.79 0.367 C57
2024-02-27 06:14:56 B 10 21 06.905 +56 40 11.50 X W42
2024-02-27 06:21:46 B 10 21 05.407 +56 40 04.15 X W42
2024-02-27 06:28:26 B 10 21 03.943 +56 39 57.02 X W42
2024-02-27 12:03:12 C 10 19 53.681 +56 34 03.83 V T05
2024-02-27 12:07:45 C 10 19 52.694 +56 33 58.79 V T05
2024-02-27 12:15:34 C 10 19 50.969 +56 33 50.08 V T05
2024-02-27 12:32:19 C 10 19 47.314 +56 33 31.82 V T05
2024-02-27 19:34:45 C 10 18 23.033 +56 25 40.48 Z C23
2024-02-27 19:40:59 C 10 18 21.739 +56 25 34.57 Z C23
2024-02-29 14:10:33 B 10 09 56.96 +55 37 23.7 V P13
2024-02-29 14:13:09 B 10 09 56.43 +55 37 20.6 V P13
2024-02-29 14:15:43 B 10 09 55.90 +55 37 17.5 V P13
2024-02-29 14:18:17 B 10 09 55.40 +55 37 14.5 V P13
2024-02-29 14:20:51 B 10 09 54.88 +55 37 11.5 V P13
2024-03-01 13:28:31 B 10 05 36.83 +55 09 07.3 V P13
2024-03-01 13:31:05 B 10 05 36.33 +55 09 04.2 V P13
2024-03-01 13:33:40 B 10 05 35.81 +55 09 01.1 V P13
2024-03-01 13:36:14 B 10 05 35.35 +55 08 58.1 V P13
2024-03-01 13:38:48 B 10 05 34.88 +55 08 54.9 V P13
2024-03-03 07:25:06 C 09 58 15.848 +54 15 36.07 V 703
2024-03-03 07:28:28 C 09 58 15.200 +54 15 30.96 V 703
2024-03-03 07:31:50 C 09 58 14.617 +54 15 26.39 V 703
2024-03-03 07:35:11 C 09 58 14.023 +54 15 21.96 V 703
2024-03-03 07:38:07 C 09 58 13.487 +54 15 18.04 V G96
2024-03-03 07:45:41 C 09 58 12.155 +54 15 07.85 V G96
2024-03-03 07:53:15 C 09 58 10.826 +54 14 57.77 V G96
2024-03-03 08:00:49 C 09 58 09.484 +54 14 47.58 V G96
2024-03-03 21:18:17 C 09 55 59.43 +53 57 01.5 X G02
2024-03-03 21:23:51 C 09 55 58.48 +53 56 53.9 X G02
2024-03-03 21:29:09 C 09 55 57.59 +53 56 46.8 X G02
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)