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
2022-01-28 11:41:53 C 14 27 04.06 +02 33 00.4 V 703
2022-01-28 11:49:26 C 14 27 04.61 +02 32 57.7 V 703
2022-01-28 11:56:58 C 14 27 05.05 +02 32 54.2 V 703
2022-01-28 15:37:54 C 14 27 19.82 +02 31 23.3 V T05
2022-01-28 15:42:34 C 14 27 20.10 +02 31 21.5 V T05
2022-01-28 15:46:41 C 14 27 20.38 +02 31 19.3 V T05
2022-01-28 15:50:40 C 14 27 20.63 +02 31 18.3 V T05
2022-02-03 10:49:15 C 14 36 16.87 +01 33 22.6 V 703
2022-02-03 10:56:54 C 14 36 17.36 +01 33 19.5 V 703
2022-02-03 11:04:34 C 14 36 17.78 +01 33 17.0 V 703
2022-02-03 11:12:14 C 14 36 18.27 +01 33 12.5 V 703
2022-02-05 14:07:13 C 14 39 23.117 +01 12 21.74 U F52
2022-02-05 14:23:43 C 14 39 24.047 +01 12 15.01 U F52
2022-02-05 14:40:13 C 14 39 24.978 +01 12 08.24 U F52
2022-02-08 15:14:00 C 14 43 36.64 +00 42 32.7 V T08
2022-02-08 15:17:59 C 14 43 36.78 +00 42 31.7 V T08
2022-02-08 15:28:37 C 14 43 37.39 +00 42 26.6 V T08
2022-02-08 15:42:56 C 14 43 38.15 +00 42 21.0 V T08
2022-02-09 11:53:52 C 14 44 45.81 +00 34 07.5 V 703
2022-02-09 12:01:28 C 14 44 46.22 +00 34 02.6 V 703
2022-02-09 12:09:04 C 14 44 46.56 +00 33 59.4 V 703
2022-02-09 12:16:41 C 14 44 46.99 +00 33 55.2 V 703
2022-02-12 11:31:53 C 14 48 36.27 +00 04 58.0 V 703
2022-02-12 11:54:47 C 14 48 37.35 +00 04 48.3 V 703
2022-02-14 15:50:29 C 14 51 14.48 -00 16 17.5 V T05
2022-02-14 15:55:07 C 14 51 14.70 -00 16 19.5 V T05
2022-02-14 15:59:05 C 14 51 14.87 -00 16 21.3 V T05
2022-02-14 16:05:17 C 14 51 15.14 -00 16 23.7 V T05
2022-02-15 11:22:33 C 14 52 11.78 -00 24 17.7 V 703
2022-02-15 11:29:53 C 14 52 12.15 -00 24 21.9 V 703
2022-02-15 11:37:13 C 14 52 12.41 -00 24 25.2 V 703
2022-02-15 11:44:33 C 14 52 12.72 -00 24 27.7 V 703
2022-02-18 14:37:23 C 14 55 39.69 -00 55 11.4 V T05
2022-02-18 14:40:01 C 14 55 39.83 -00 55 11.9 V T05
2022-02-18 14:46:05 C 14 55 40.06 -00 55 14.5 V T05
2022-02-18 14:53:21 C 14 55 40.36 -00 55 17.6 V T05
2022-02-20 13:08:59 C 14 57 38.74 -01 14 30.9 V T08
2022-02-20 13:11:37 C 14 57 38.86 -01 14 31.1 V T08
2022-02-20 13:22:49 C 14 57 39.24 -01 14 36.6 V T08
2022-02-20 13:34:00 C 14 57 39.70 -01 14 40.1 V T08
2022-02-24 14:51:08 C 15 01 20.24 -01 55 48.8 V T08
2022-02-24 14:59:01 C 15 01 20.47 -01 55 52.3 V T08
2022-02-24 15:42:27 C 15 01 21.81 -01 56 10.8 V T08
2022-02-24 15:52:34 C 15 01 22.12 -01 56 15.0 V T08
2022-02-26 14:24:36 C 15 02 53.76 -02 16 24.2 V T05
2022-02-26 14:25:14 C 15 02 53.766 -02 16 24.25 U F52
2022-02-26 14:31:11 C 15 02 53.93 -02 16 26.8 V T05
2022-02-26 14:39:06 C 15 02 54.13 -02 16 30.1 V T05
2022-02-26 14:42:53 C 15 02 54.236 -02 16 31.95 U F52
2022-02-26 15:18:18 C 15 02 55.175 -02 16 47.43 U F52
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)