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
2025-02-11 07:33:18 C 03 42 30.473 +61 38 44.12 V T08
2025-02-11 07:37:57 C 03 42 31.910 +61 38 40.52 V T08
2025-02-15 09:58:45 C 04 11 44.515 +60 19 51.92 V T08
2025-02-15 10:03:24 C 04 11 46.049 +60 19 47.60 V T08
2025-02-15 10:10:00 C 04 11 47.971 +60 19 40.48 V T08
2025-02-15 10:13:22 C 04 11 48.888 +60 19 37.92 V T08
2025-02-15 10:16:02 C 04 11 49.668 +60 19 35.40 V T08
2025-02-15 10:24:10 C 04 11 51.653 +60 19 28.92 V T08
2025-02-15 10:29:29 C 04 11 53.326 +60 19 22.80 V T08
2025-02-15 10:42:13 C 04 11 56.990 +60 19 11.93 V T08
2025-02-19 06:58:59 C 04 36 43.034 +58 53 25.51 V T08
2025-02-19 07:13:11 C 04 36 46.512 +58 53 11.15 V T08
2025-02-19 07:17:53 C 04 36 47.616 +58 53 06.83 V T08
2025-02-21 04:04:41 C 04 47 56.490 +58 08 09.20 V 703
2025-02-21 04:08:10 C 04 47 57.365 +58 08 04.38 V 703
2025-02-21 04:11:38 C 04 47 58.160 +58 08 02.44 V 703
2025-02-21 04:15:06 C 04 47 59.039 +58 07 58.22 V 703
2025-02-21 07:12:36 C 04 48 42.050 +58 04 59.41 V T05
2025-02-21 07:17:13 C 04 48 43.094 +58 04 54.26 V T05
2025-02-21 07:25:50 C 04 48 45.091 +58 04 45.16 V T05
2025-02-21 07:27:47 C 04 48 45.595 +58 04 43.10 V T05
2025-02-21 07:32:22 C 04 48 46.606 +58 04 38.42 V T05
2025-02-21 07:41:05 C 04 48 48.708 +58 04 29.46 V T05
2025-02-21 07:41:44 C 04 48 48.869 +58 04 28.56 V T05
2025-02-22 02:44:10 C 04 53 23.593 +57 44 48.44 V G96
2025-02-22 02:52:02 C 04 53 25.393 +57 44 40.02 V G96
2025-02-22 02:59:52 C 04 53 27.193 +57 44 31.78 V G96
2025-02-22 03:07:44 C 04 53 29.051 +57 44 23.21 V G96
2025-02-23 03:47:32 C 04 59 14.986 +57 18 29.99 V 703
2025-02-23 03:51:02 C 04 59 15.709 +57 18 26.78 V 703
2025-02-23 03:54:31 C 04 59 16.508 +57 18 23.08 V 703
2025-02-23 03:58:01 C 04 59 17.250 +57 18 19.26 V 703
2025-02-23 07:10:17 C 05 00 01.414 +57 14 58.63 V T08
2025-02-23 07:18:16 C 05 00 03.187 +57 14 49.67 V T08
2025-02-23 07:35:29 C 05 00 07.044 +57 14 31.06 V T08
2025-02-23 18:16:12 C 05 02 34.49 +57 03 03.3 q L04
2025-02-23 18:20:54 C 05 02 35.52 +57 02 58.6 q L04
2025-02-23 18:24:23 C 05 02 36.27 +57 02 54.7 q L04
2025-02-25 07:10:55 C 05 10 48.350 +56 23 23.39 V T05
2025-02-25 07:15:30 C 05 10 49.339 +56 23 18.24 V T05
2025-02-25 07:20:07 C 05 10 50.316 +56 23 13.24 V T05
2025-02-25 07:23:24 C 05 10 51.000 +56 23 09.53 V T05
2025-02-25 07:30:46 C 05 10 52.565 +56 23 00.82 V T05
2025-02-25 07:35:25 C 05 10 53.587 +56 22 56.14 V T05
2025-02-25 07:38:05 C 05 10 54.118 +56 22 52.82 V T05
2025-02-25 07:50:39 C 05 10 56.782 +56 22 38.89 V T05
2025-02-27 04:35:55 C 05 20 31.700 +55 33 25.13 V 703
2025-02-27 04:39:25 C 05 20 32.543 +55 33 21.24 V 703
2025-02-27 04:42:55 C 05 20 33.313 +55 33 17.35 V 703
2025-02-27 04:46:24 C 05 20 34.004 +55 33 13.46 V 703
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)