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
2024-02-19 10:33:08 C 11 05 26.760 +59 04 32.84 V T05
2024-02-19 10:35:45 C 11 05 26.076 +59 04 31.76 V T05
2024-02-19 10:39:01 C 11 05 25.210 +59 04 30.18 V T05
2024-02-19 10:39:40 C 11 05 25.018 +59 04 30.00 V T05
2024-02-19 10:43:45 C 11 05 23.983 +59 04 28.52 V T05
2024-02-19 10:48:19 C 11 05 22.673 +59 04 26.18 V T05
2024-02-19 10:48:58 C 11 05 22.510 +59 04 25.86 V T05
2024-02-19 18:27:45 B 11 03 24.63 +59 00 52.5 Z O53
2024-02-19 18:43:11 B 11 03 20.46 +59 00 45.0 Z O53
2024-02-19 18:52:31 B 11 03 17.97 +59 00 40.4 Z O53
2024-02-19 23:15:21 C 11 02 12.72 +58 58 19.2 q Y96
2024-02-19 23:39:01 C 11 02 06.52 +58 58 07.3 q Y96
2024-02-19 23:55:58 C 11 02 02.03 +58 58 00.3 q Y96
2024-02-20 10:25:43 C 10 59 22.456 +58 52 39.14 X F51
2024-02-20 10:43:30 C 10 59 17.735 +58 52 29.89 X F51
2024-02-20 11:01:16 C 10 59 13.014 +58 52 20.50 X F51
2024-02-20 11:19:04 C 10 59 08.287 +58 52 10.95 X F51
2024-02-21 10:07:29 C 10 53 26.541 +58 38 51.86 X F51
2024-02-21 10:24:19 C 10 53 22.142 +58 38 41.75 X F51
2024-02-21 10:41:09 C 10 53 17.748 +58 38 31.51 X F51
2024-02-21 10:51:16 C 10 53 15.099 +58 38 25.32 X F52
2024-02-21 10:58:02 C 10 53 13.339 +58 38 21.13 X F51
2024-02-21 11:09:11 C 10 53 10.422 +58 38 14.15 X F52
2024-02-21 11:44:57 C 10 53 01.151 +58 37 52.04 X F52
2024-02-21 16:41:57 B 10 51 49.08 +58 34 43.6 Z O53
2024-02-21 16:51:19 B 10 51 46.64 +58 34 37.9 Z O53
2024-02-21 17:00:40 B 10 51 44.19 +58 34 31.8 Z O53
2024-02-21 17:35:02 S 10 54 09.816 +58 31 10.34 V C57
2024-02-21 17:35:02 s 1 +164886.83 1 +271659.51 450.0 C57
2024-02-21 18:35:02 S 10 53 55.193 +58 30 36.18 V C57
2024-02-21 18:35:02 s 1 +162727.48 0 +272478.90 4690.0 C57
2024-02-21 18:55:02 S 10 53 50.299 +58 30 24.12 V C57
2024-02-21 18:55:02 s 1 +162002.01 4 +272742.49 5690.0 C57
2024-02-21 19:15:02 S 10 53 45.660 +58 30 12.82 V C57
2024-02-21 19:15:02 s 1 +161273.72 0 +273001.30 8360.0 C57
2024-02-21 19:35:02 S 10 53 40.464 +58 30 00.72 V C57
2024-02-21 19:35:02 s 1 +160542.61 3 +273255.32 2840.0 C57
2024-02-21 19:55:02 S 10 53 35.666 +58 29 50.39 V C57
2024-02-21 19:55:02 s 1 +159808.67 5 +273504.50 9190.0 C57
2024-02-21 20:15:02 S 10 53 30.725 +58 29 37.25 V C57
2024-02-21 20:15:02 s 1 +159071.92 7 +273748.84 7550.0 C57
2024-02-21 20:35:02 S 10 53 25.795 +58 29 25.76 V C57
2024-02-21 20:35:02 s 1 +158332.38 2 +273988.34 8080.0 C57
2024-02-21 20:55:02 S 10 53 20.813 +58 29 12.52 V C57
2024-02-21 20:55:02 s 1 +157590.02 4 +274222.95 840.0 C57
2024-02-21 21:15:02 S 10 53 16.183 +58 29 02.62 V C57
2024-02-21 21:15:02 s 1 +156844.87 3 +274452.68 5970.0 C57
2024-02-21 21:35:02 S 10 53 10.740 +58 28 50.81 V C57
2024-02-21 21:35:02 s 1 +156096.94 3 +274677.51 3630.0 C57
2024-02-21 21:55:02 S 10 53 06.034 +58 28 38.10 V C57
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)