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
2023-02-13 01:08:35 C 13 52 49.654 +21 01 16.10 V M22
2023-02-13 01:59:33 C 13 52 48.437 +21 01 31.94 V M22
2023-02-13 02:19:05 C 13 52 47.969 +21 01 38.17 V M22
2023-02-13 11:31:19 C 13 52 36.484 +21 04 05.84 V 703
2023-02-13 11:39:04 C 13 52 36.246 +21 04 07.93 V 703
2023-02-13 11:46:49 C 13 52 36.052 +21 04 10.60 V 703
2023-02-13 11:54:34 C 13 52 35.850 +21 04 13.01 V 703
2023-02-14 07:07:15 C 13 52 10.205 +21 10 27.70 V W68
2023-02-14 07:09:51 C 13 52 10.097 +21 10 27.91 V W68
2023-02-14 07:14:23 C 13 52 09.977 +21 10 29.53 V W68
2023-02-14 07:22:11 C 13 52 09.749 +21 10 32.38 V W68
2023-02-18 08:24:32 C 13 49 01.174 +21 42 27.86 V W68
2023-02-18 08:29:05 C 13 49 00.970 +21 42 29.02 V W68
2023-02-18 08:42:25 C 13 49 00.341 +21 42 33.95 V W68
2023-02-18 09:18:20 C 13 48 58.658 +21 42 46.15 V W68
2023-02-19 20:15:13 C 13 47 26.80 +21 54 34.5 V D29
2023-02-19 20:35:35 C 13 47 25.74 +21 54 41.6 V D29
2023-02-19 20:55:56 C 13 47 24.66 +21 54 48.8 V D29
2023-02-22 07:48:43 C 13 44 19.325 +22 16 07.10 V W68
2023-02-22 07:53:16 C 13 44 19.018 +22 16 08.83 V W68
2023-02-22 07:57:49 C 13 44 18.734 +22 16 10.42 V W68
2023-02-22 08:05:36 C 13 44 18.238 +22 16 13.15 V W68
2023-02-26 07:23:59 C 13 37 52.039 +22 50 26.88 V W68
2023-02-26 07:27:53 C 13 37 51.689 +22 50 28.43 V W68
2023-02-26 07:32:25 C 13 37 51.336 +22 50 29.98 V W68
2023-02-26 07:42:48 C 13 37 50.470 +22 50 33.94 V W68
2023-02-26 14:13:41 C 13 37 19.704 +22 52 35.04 V T05
2023-02-26 14:18:35 C 13 37 19.301 +22 52 36.70 V T05
2023-02-26 14:26:05 C 13 37 18.658 +22 52 39.43 V T05
2023-02-26 14:42:25 C 13 37 17.290 +22 52 44.76 V T05
2023-03-01 00:29:53 C 13 32 25.164 +23 13 05.84 V M22
2023-03-01 00:34:26 C 13 32 24.727 +23 13 07.50 V M22
2023-03-01 00:54:43 C 13 32 22.778 +23 13 14.63 V M22
2023-03-01 01:02:32 C 13 32 22.015 +23 13 17.29 V M22
2023-03-01 09:05:39 C 13 31 38.111 +23 15 36.68 V 703
2023-03-01 09:13:20 C 13 31 37.348 +23 15 39.24 V 703
2023-03-01 09:20:59 C 13 31 36.595 +23 15 41.83 V 703
2023-03-01 09:28:38 C 13 31 35.854 +23 15 44.46 V 703
2023-03-02 06:40:02 C 13 29 35.724 +23 23 07.22 V W68
2023-03-02 06:44:35 C 13 29 35.266 +23 23 08.74 V W68
2023-03-02 07:22:02 C 13 29 31.382 +23 23 21.05 V W68
2023-03-02 08:02:44 C 13 29 27.206 +23 23 34.15 V W68
2023-03-04 22:37:09 C 13 22 59.746 +23 42 24.34 q M16
2023-03-04 22:53:48 C 13 22 57.862 +23 42 28.55 q M16
2023-03-04 23:10:26 C 13 22 56.014 +23 42 34.16 q M16
2023-03-04 23:58:21 C 13 22 50.282 +23 43 17.76 V M22
2023-03-05 00:00:57 C 13 22 49.994 +23 43 18.34 V M22
2023-03-05 00:06:50 C 13 22 49.322 +23 43 20.24 V M22
2023-03-05 00:14:07 C 13 22 48.463 +23 43 22.40 V M22
2023-03-05 03:59:25 C 13 22 22.48 +23 43 57.9 X L63
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)