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
2022-04-28 06:14:12 C 12 59 14.831 -22 47 17.95 V 703
2022-04-29 04:41:26 C 12 54 02.215 -23 09 33.52 V W68
2022-04-29 04:45:48 C 12 54 01.157 -23 09 37.73 V W68
2022-04-29 04:56:09 C 12 53 58.668 -23 09 47.84 V W68
2022-04-29 05:12:02 C 12 53 54.833 -23 10 03.29 V W68
2022-04-29 08:02:49 C 12 53 17.080 -23 13 26.48 U F52
2022-04-29 08:18:19 C 12 53 13.314 -23 13 43.09 U F52
2022-04-29 08:33:54 C 12 53 09.532 -23 13 58.62 U F52
2022-04-29 08:49:24 C 12 53 05.763 -23 14 14.20 U F52
2022-04-29 15:53:04 C 12 51 26.914 -23 20 46.86 V P07
2022-04-29 15:54:07 C 12 51 26.659 -23 20 47.76 V P07
2022-04-29 16:05:33 C 12 51 23.894 -23 20 58.88 V P07
2022-04-29 16:40:23 C 12 51 15.463 -23 21 32.26 V P07
2022-04-29 16:49:28 C 12 51 13.272 -23 21 40.86 V P07
2022-04-29 16:52:14 C 12 51 12.583 -23 21 43.42 V P07
2022-05-02 06:25:23 C 12 37 02.773 -24 19 40.22 V 703
2022-05-02 06:33:27 C 12 37 00.901 -24 19 47.42 V 703
2022-05-02 06:41:31 C 12 36 59.036 -24 19 53.76 V 703
2022-05-03 04:19:20 C 12 32 03.509 -24 37 56.46 V W68
2022-05-03 04:25:36 C 12 32 02.028 -24 38 01.57 V W68
2022-05-03 04:35:53 C 12 31 59.609 -24 38 09.89 V W68
2022-05-03 04:53:38 C 12 31 55.421 -24 38 24.25 V W68
2022-05-03 21:08:46 C 12 28 16.792 -24 52 34.48 V L92
2022-05-03 21:11:57 C 12 28 15.939 -24 52 36.54 V L92
2022-05-03 21:15:09 C 12 28 15.142 -24 52 39.21 V L92
2022-05-03 21:18:20 C 12 28 14.457 -24 52 41.74 V L92
2022-05-03 21:21:33 C 12 28 13.767 -24 52 45.07 V L92
2022-05-03 21:23:41 C 12 28 13.203 -24 52 46.59 V L92
2022-05-06 03:41:24 C 12 16 13.330 -25 33 54.61 V W68
2022-05-06 03:45:40 C 12 16 12.367 -25 33 57.67 V W68
2022-05-06 03:55:21 C 12 16 10.166 -25 34 04.44 V W68
2022-05-06 04:12:52 C 12 16 06.206 -25 34 16.54 V W68
2022-05-06 05:25:32 C 12 15 51.343 -25 35 47.18 V G96
2022-05-06 05:33:14 C 12 15 49.604 -25 35 52.58 V G96
2022-05-06 05:40:55 C 12 15 47.855 -25 35 58.02 V G96
2022-05-06 05:48:38 C 12 15 46.105 -25 36 03.49 V G96
2022-05-06 05:57:18 C 12 15 44.176 -25 36 09.36 V 703
2022-05-06 06:05:23 C 12 15 42.318 -25 36 15.19 V 703
2022-05-06 06:13:28 C 12 15 40.486 -25 36 20.95 V 703
2022-05-06 06:21:33 C 12 15 38.664 -25 36 26.64 V 703
2022-05-07 02:41:06 C 12 11 17.597 -25 50 10.57 V W68
2022-05-07 02:45:10 C 12 11 16.690 -25 50 13.27 V W68
2022-05-07 02:54:08 C 12 11 14.681 -25 50 19.36 V W68
2022-05-07 03:10:05 C 12 11 11.134 -25 50 29.98 V W68
2022-05-07 09:36:00 C 12 09 50.02 -25 54 48.8 q E89
2022-05-07 09:39:05 C 12 09 49.27 -25 54 50.9 q E89
2022-05-07 09:41:30 C 12 09 48.80 -25 54 52.5 q E89
2022-05-10 01:59:48 C 11 56 37.546 -26 35 26.30 V W68
2022-05-10 02:05:22 C 11 56 36.379 -26 35 29.51 V W68
2022-05-10 02:16:14 C 11 56 34.114 -26 35 35.74 V W68
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)