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
2023-03-05 04:12:33 C 13 22 20.97 +23 44 01.9 X L63
2023-03-05 04:25:39 C 13 22 19.41 +23 44 04.9 X L63
2023-03-05 06:51:53 C 13 22 05.002 +23 44 50.35 V 703
2023-03-05 06:59:55 C 13 22 04.062 +23 44 53.02 V 703
2023-03-05 07:07:57 C 13 22 03.133 +23 44 55.61 V 703
2023-03-05 07:16:00 C 13 22 02.190 +23 44 58.09 V 703
2023-03-06 04:13:25 C 13 19 39.038 +23 51 08.03 V W68
2023-03-06 04:16:40 C 13 19 38.674 +23 51 08.75 V W68
2023-03-06 04:21:53 C 13 19 38.002 +23 51 10.44 V W68
2023-03-06 04:38:52 C 13 19 35.930 +23 51 15.23 V W68
2023-03-06 09:16:30 C 13 19 03.996 +23 52 09.08 V T05
2023-03-06 09:23:25 C 13 19 03.139 +23 52 11.17 V T05
2023-03-06 09:36:32 C 13 19 01.541 +23 52 14.74 V T05
2023-03-06 09:52:08 C 13 18 59.638 +23 52 19.38 V T05
2023-03-11 23:37:05 C 13 01 32.34 +24 18 34.2 q 168
2023-03-12 01:02:31 C 13 01 19.83 +24 18 43.1 q 168
2023-03-12 21:57:08 C 12 58 19.97 +24 20 59.2 V M26
2023-03-12 22:02:46 C 12 58 19.12 +24 20 59.6 V M26
2023-03-12 22:07:32 C 12 58 18.40 +24 21 00.3 V M26
2023-03-12 23:32:43 C 12 58 05.311 +24 21 39.24 V M22
2023-03-12 23:36:37 C 12 58 04.706 +24 21 39.96 V M22
2023-03-12 23:41:11 C 12 58 04.013 +24 21 40.14 V M22
2023-03-13 00:13:02 C 12 57 59.129 +24 21 43.02 V M22
2023-03-14 04:01:10 C 12 53 51.348 +24 23 32.10 V W68
2023-03-14 04:03:46 C 12 53 50.942 +24 23 32.42 V W68
2023-03-14 04:43:14 C 12 53 44.722 +24 23 34.80 V W68
2023-03-14 04:52:37 C 12 53 43.246 +24 23 35.48 V W68
2023-03-14 12:02:24 C 12 52 37.330 +24 23 33.32 V T05
2023-03-14 12:06:35 C 12 52 36.667 +24 23 33.47 V T05
2023-03-14 12:14:40 C 12 52 35.369 +24 23 33.76 V T05
2023-03-14 13:06:29 C 12 52 27.074 +24 23 34.91 V T05
2023-03-16 00:25:43 C 12 46 59.12 +24 23 31.6 V 130
2023-03-16 00:27:15 C 12 46 58.87 +24 23 31.6 V 130
2023-03-16 00:29:09 C 12 46 58.55 +24 23 31.5 V 130
2023-03-16 00:31:27 C 12 46 58.19 +24 23 31.5 V 130
2023-03-17 16:53:30 C 12 40 31.93 +24 20 57.4 q 168
2023-03-17 18:07:31 C 12 40 19.71 +24 20 52.1 q 168
2023-03-17 19:20:31 C 12 40 07.58 +24 20 45.9 q 168
2023-03-17 21:41:43 C 12 39 44.83 +24 20 34.2 X G02
2023-03-17 21:47:03 C 12 39 43.93 +24 20 33.8 X G02
2023-03-17 21:52:24 C 12 39 43.03 +24 20 33.2 X G02
2023-03-18 03:51:54 C 12 38 44.638 +24 20 26.09 V W68
2023-03-18 04:42:50 C 12 38 35.962 +24 20 20.58 V W68
2023-03-18 04:47:23 C 12 38 35.194 +24 20 20.33 V W68
2023-03-18 11:23:26 C 12 37 28.808 +24 19 03.58 V G96
2023-03-18 11:29:32 C 12 37 28.927 +24 19 11.14 V T05
2023-03-18 11:30:50 C 12 37 27.570 +24 19 02.57 V G96
2023-03-18 11:34:07 C 12 37 28.147 +24 19 10.52 V T05
2023-03-18 11:38:13 C 12 37 26.321 +24 19 01.27 V G96
2023-03-18 11:41:52 C 12 37 26.815 +24 19 09.48 V T05
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)