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
2024-03-28 06:49:22 C 09 11 49.135 +39 05 57.19 V 703
2024-03-28 06:59:22 C 09 11 49.124 +39 05 43.80 V 703
2024-03-28 08:10:59 C 09 11 48.847 +39 04 01.09 V T05
2024-03-28 08:15:49 C 09 11 48.792 +39 03 53.86 V T05
2024-03-28 08:19:44 C 09 11 48.751 +39 03 47.99 V T05
2024-03-28 08:25:45 C 09 11 48.610 +39 03 39.24 V T05
2024-03-28 08:32:27 C 09 11 48.487 +39 03 28.62 V T05
2024-03-28 08:37:00 C 09 11 48.437 +39 03 22.50 V T05
2024-03-28 09:00:58 C 09 11 48.007 +39 02 45.49 V T05
2024-03-29 07:55:07 C 09 11 35.407 +38 28 42.49 V T08
2024-03-29 08:01:17 C 09 11 35.304 +38 28 32.99 V T05
2024-03-29 08:15:36 C 09 11 35.151 +38 28 11.41 X F52
2024-03-29 08:17:31 C 09 11 35.093 +38 28 08.75 X F52
2024-03-29 08:18:03 C 09 11 35.102 +38 28 07.64 V T05
2024-03-29 08:22:37 C 09 11 35.006 +38 28 00.95 V T05
2024-03-29 08:31:45 C 09 11 34.901 +38 27 47.52 V T05
2024-03-29 08:32:50 C 09 11 34.877 +38 27 46.19 V T08
2024-03-29 08:33:19 C 09 11 34.873 +38 27 44.89 X F52
2024-03-29 08:38:30 C 09 11 34.805 +38 27 37.80 V T08
2024-03-29 08:50:42 C 09 11 34.641 +38 27 18.96 X F52
2024-03-29 08:52:35 C 09 11 34.616 +38 27 16.06 X F52
2024-03-29 09:01:42 C 09 11 34.502 +38 27 02.92 V T08
2024-03-29 09:08:16 C 09 11 34.423 +38 26 52.47 X F52
2024-03-29 09:10:12 C 09 11 34.387 +38 26 49.62 X F52
2024-03-29 09:34:52 C 09 11 34.073 +38 26 12.45 X F51
2024-03-29 09:50:55 C 09 11 33.872 +38 25 48.31 X F51
2024-03-29 10:22:49 C 09 11 33.492 +38 25 00.01 X F51
2024-03-30 06:09:33 C 09 11 26.617 +37 55 47.50 V 703
2024-03-30 06:12:51 C 09 11 26.635 +37 55 43.18 V 703
2024-03-30 06:16:08 C 09 11 26.596 +37 55 37.63 V 703
2024-03-30 06:19:26 C 09 11 26.466 +37 55 32.09 V 703
2024-03-30 08:04:21 C 09 11 26.419 +37 53 03.37 V T05
2024-03-30 08:11:57 C 09 11 26.359 +37 52 52.07 V T05
2024-03-30 08:17:50 C 09 11 26.285 +37 52 43.32 V T05
2024-03-30 08:33:37 C 09 11 26.110 +37 52 19.96 V T05
2024-03-31 05:53:52 C 09 11 22.175 +37 21 02.45 V 703
2024-03-31 05:57:11 C 09 11 22.175 +37 20 57.55 V 703
2024-03-31 06:00:29 C 09 11 22.128 +37 20 52.33 V 703
2024-03-31 06:03:47 C 09 11 22.124 +37 20 47.26 V 703
2024-03-31 08:46:51 C 09 11 21.910 +37 16 53.54 V T08
2024-03-31 09:14:07 C 09 11 21.732 +37 16 13.44 V T08
2024-03-31 09:18:46 C 09 11 21.694 +37 16 06.38 V T08
2024-03-31 09:42:08 C 09 11 21.566 +37 15 31.68 V T08
2024-04-01 08:44:36 C 09 11 22.250 +36 42 08.06 V T05
2024-04-01 08:49:09 C 09 11 22.277 +36 42 01.62 V T05
2024-04-01 08:59:07 C 09 11 22.217 +36 41 47.04 V T05
2024-04-01 09:29:22 C 09 11 22.130 +36 41 02.15 V T05
2024-04-01 22:24:03 C 09 11 24.554 +36 22 17.72 Z C23
2024-04-01 22:30:31 C 09 11 24.482 +36 22 08.62 Z C23
2024-04-01 22:34:54 C 09 11 24.526 +36 22 02.39 Z C23
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)