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
2023-03-18 11:45:37 C 12 37 25.075 +24 19 00.08 V G96
2023-03-18 12:27:05 C 12 37 19.044 +24 19 03.29 V T05
2023-03-19 00:08:04 B 12 35 24.25 +24 17 09.6 V L65
2023-03-19 00:14:14 B 12 35 23.20 +24 17 08.7 V L65
2023-03-19 00:20:25 B 12 35 22.14 +24 17 07.8 V L65
2023-03-19 08:38:15 C 12 34 00.953 +24 15 59.51 V T05
2023-03-19 08:40:54 C 12 34 00.492 +24 15 59.15 V T05
2023-03-19 08:44:53 C 12 33 59.815 +24 15 58.46 V T05
2023-03-19 09:14:58 C 12 33 54.624 +24 15 54.22 V T05
2023-03-19 13:26:37 C 12 33 10.962 +24 15 09.96 U F52
2023-03-19 13:59:23 C 12 33 05.312 +24 15 03.20 U F52
2023-03-19 14:15:45 C 12 33 02.496 +24 14 59.75 U F52
2023-03-22 05:45:51 C 12 22 23.342 +24 00 04.21 V W68
2023-03-22 05:50:24 C 12 22 22.538 +24 00 02.81 V W68
2023-03-22 06:32:02 C 12 22 15.197 +23 59 49.60 V W68
2023-03-22 06:39:53 C 12 22 13.814 +23 59 47.15 V W68
2023-03-23 10:48:54 C 12 17 27.830 +23 50 05.03 V T05
2023-03-23 11:04:28 C 12 17 25.056 +23 49 59.38 V T05
2023-03-23 11:08:40 C 12 17 24.322 +23 49 57.86 V T05
2023-03-23 11:19:21 C 12 17 22.409 +23 49 53.76 V T05
2023-03-25 07:49:32 C 12 09 49.468 +23 31 43.72 V 703
2023-03-25 07:57:23 C 12 09 48.064 +23 31 40.22 V 703
2023-03-25 08:04:57 C 12 09 46.735 +23 31 36.59 V 703
2023-03-25 08:12:31 C 12 09 45.392 +23 31 33.28 V 703
2023-03-26 04:01:57 C 12 06 25.075 +23 22 39.68 V W68
2023-03-26 04:04:34 C 12 06 24.612 +23 22 38.46 V W68
2023-03-26 04:55:26 C 12 06 15.670 +23 22 13.33 V W68
2023-03-26 05:33:44 C 12 06 08.940 +23 21 54.72 V W68
2023-03-26 09:26:15 C 12 05 30.600 +23 19 38.93 V T05
2023-03-26 09:28:51 C 12 05 30.139 +23 19 37.74 V T05
2023-03-26 09:33:33 C 12 05 29.318 +23 19 35.40 V T05
2023-03-26 10:21:09 C 12 05 20.933 +23 19 11.68 V T05
2023-03-27 08:53:11 C 12 01 34.886 +23 07 23.77 V T05
2023-03-27 08:57:54 C 12 01 34.061 +23 07 21.36 V T05
2023-03-27 09:06:16 C 12 01 32.609 +23 07 16.93 V T05
2023-03-27 09:18:16 C 12 01 30.509 +23 07 10.45 V T05
2023-03-27 11:36:18 C 12 01 06.393 +23 05 54.33 U F52
2023-03-27 12:15:19 C 12 00 59.600 +23 05 32.31 U F52
2023-03-27 12:34:46 C 12 00 56.229 +23 05 20.85 U F52
2023-03-27 17:21:21 C 12 00 09.98 +23 02 33.0 Y N42
2023-03-27 17:25:02 C 12 00 09.34 +23 02 30.7 Y N42
2023-03-27 17:28:44 C 12 00 08.72 +23 02 29.0 Y N42
2023-03-28 06:55:13 C 11 57 54.569 +22 54 51.80 V 703
2023-03-28 07:02:48 C 11 57 53.258 +22 54 47.34 V 703
2023-03-28 07:10:23 C 11 57 51.948 +22 54 42.91 V 703
2023-03-28 07:17:58 C 11 57 50.645 +22 54 38.41 V 703
2023-03-28 22:55:54 C 11 55 15.907 +22 45 41.58 V M22
2023-03-28 23:03:21 C 11 55 14.662 +22 45 37.22 V M22
2023-03-28 23:26:50 C 11 55 10.658 +22 45 22.36 V M22
2023-03-28 23:31:28 C 11 55 09.878 +22 45 19.55 V M22
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)