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
2023-05-06 21:42:51 C 10 34 20.88 +07 36 18.2 V 069
2023-05-06 21:48:50 C 10 34 20.77 +07 36 12.4 V 069
2023-05-06 22:00:37 S 10 34 21.33 +07 36 14.3 L C51
2023-05-06 22:12:06 C 10 34 20.45 +07 35 52.5 X K83
2023-05-06 22:16:40 C 10 34 20.36 +07 35 47.7 X K83
2023-05-06 22:21:45 C 10 34 20.27 +07 35 42.7 X K83
2023-05-07 01:07:39 S 10 34 19.07 +07 33 09.6 L C51
2023-05-07 04:14:41 S 10 34 16.97 +07 30 01.7 L C51
2023-05-07 05:48:12 S 10 34 15.95 +07 28 27.1 L C51
2023-05-07 07:21:43 S 10 34 14.97 +07 26 54.4 L C51
2023-05-07 08:55:14 S 10 34 14.03 +07 25 21.2 L C51
2023-05-07 10:28:45 S 10 34 13.02 +07 23 47.9 L C51
2023-05-07 12:02:16 S 10 34 12.05 +07 22 13.3 L C51
2023-05-07 15:09:07 S 10 34 10.23 +07 19 07.4 L C51
2023-05-07 15:09:18 S 10 34 10.17 +07 19 08.1 L C51
2023-05-07 18:16:09 S 10 34 08.53 +07 16 02.7 L C51
2023-05-07 20:20:09 C 10 34 06.93 +07 13 43.8 V 069
2023-05-07 20:24:05 C 10 34 06.90 +07 13 40.0 V 069
2023-05-07 20:30:04 C 10 34 06.82 +07 13 33.9 V 069
2023-05-07 20:36:04 C 10 34 06.76 +07 13 28.0 V 069
2023-05-07 20:42:05 C 10 34 06.69 +07 13 21.9 V 069
2023-05-07 20:48:04 C 10 34 06.62 +07 13 16.0 V 069
2023-05-07 20:54:04 C 10 34 06.55 +07 13 10.0 V 069
2023-05-07 21:00:05 C 10 34 06.49 +07 13 04.1 V 069
2023-05-07 21:06:04 C 10 34 06.42 +07 12 57.9 V 069
2023-05-07 21:12:04 C 10 34 06.35 +07 12 52.1 V 069
2023-05-07 21:18:05 C 10 34 06.29 +07 12 46.0 V 069
2023-05-07 21:21:48 C 10 34 06.24 +07 12 42.2 V 069
2023-05-07 21:23:11 S 10 34 06.65 +07 12 55.1 L C51
2023-05-07 21:27:49 C 10 34 06.18 +07 12 36.2 V 069
2023-05-07 21:33:48 C 10 34 06.13 +07 12 30.4 V 069
2023-05-07 21:39:48 C 10 34 06.05 +07 12 24.2 V 069
2023-05-07 21:45:49 C 10 34 05.97 +07 12 18.1 V 069
2023-05-08 01:36:49 C 10 34 04.169 +07 08 54.82 V W68
2023-05-08 01:41:24 C 10 34 04.135 +07 08 50.39 V W68
2023-05-08 01:58:13 C 10 34 03.919 +07 08 33.36 V W68
2023-05-08 02:06:01 C 10 34 03.792 +07 08 25.80 V W68
2023-05-08 04:23:20 C 10 34 02.744 +07 05 49.56 V 703
2023-05-08 04:31:36 C 10 34 02.636 +07 05 40.96 V 703
2023-05-08 04:39:52 C 10 34 02.528 +07 05 32.78 V 703
2023-05-08 04:48:08 C 10 34 02.424 +07 05 24.65 V 703
2023-05-09 19:29:58 C 10 33 48.398 +06 27 27.65 V M22
2023-05-09 19:34:32 C 10 33 48.362 +06 27 23.44 V M22
2023-05-09 19:43:44 C 10 33 48.264 +06 27 14.33 V M22
2023-05-09 19:58:11 C 10 33 48.151 +06 27 00.36 V M22
2023-05-15 12:49:38 C 10 34 10.74 +04 13 57.4 V D29
2023-05-15 13:10:00 C 10 34 10.84 +04 13 38.0 V D29
2023-05-15 13:30:22 C 10 34 10.97 +04 13 18.4 V D29
2023-05-18 17:54:47 C 10 35 08.275 +03 01 07.46 V M22
2023-05-18 18:02:44 C 10 35 08.328 +03 00 59.87 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)