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
2024-01-24 14:47:52 C 13 12 03.864 +54 23 12.01 V T08
2024-01-24 15:01:14 C 13 12 02.278 +54 23 25.08 V T08
2024-01-26 12:53:41 C 13 06 50.174 +55 07 19.67 V T05
2024-01-26 12:56:18 C 13 06 49.829 +55 07 22.44 V T05
2024-01-26 13:01:39 C 13 06 49.116 +55 07 27.62 V T05
2024-01-26 13:09:30 C 13 06 48.046 +55 07 35.40 V T05
2024-01-27 00:40:02 C 13 05 22.836 +55 18 11.38 Z C23
2024-01-27 00:44:21 C 13 05 22.274 +55 18 16.13 Z C23
2024-01-27 00:48:40 C 13 05 21.739 +55 18 20.05 Z C23
2024-01-29 08:45:08 C 12 57 47.948 +56 09 50.98 V 703
2024-01-29 08:46:15 C 12 57 47.956 +56 09 52.56 V 703
2024-01-29 08:48:39 C 12 57 47.509 +56 09 56.02 V 703
2024-01-29 08:49:46 C 12 57 47.484 +56 09 56.41 V 703
2024-01-29 08:52:10 C 12 57 46.969 +56 09 58.32 V 703
2024-01-29 08:53:18 C 12 57 46.948 +56 10 00.08 V 703
2024-01-29 08:55:41 C 12 57 46.494 +56 10 02.28 V 703
2024-01-29 08:56:49 C 12 57 46.382 +56 10 03.29 V 703
2024-01-30 10:10:52 C 12 53 58.819 +56 32 21.37 V 703
2024-01-30 10:15:01 C 12 53 58.164 +56 32 25.48 V 703
2024-01-30 10:19:09 C 12 53 57.458 +56 32 29.04 V 703
2024-01-30 10:22:29 C 12 53 56.947 +56 32 31.85 V 703
2024-01-31 09:08:37 C 12 50 20.965 +56 51 56.12 V G96
2024-01-31 09:16:11 C 12 50 19.666 +56 52 02.82 V G96
2024-01-31 09:23:45 C 12 50 18.348 +56 52 09.48 V G96
2024-01-31 09:31:21 C 12 50 17.048 +56 52 16.21 V G96
2024-02-01 12:08:11 C 12 45 49.435 +57 14 11.62 V T08
2024-02-01 12:12:30 C 12 45 48.634 +57 14 15.54 V T08
2024-02-01 12:43:58 C 12 45 42.845 +57 14 42.00 V T08
2024-02-01 12:58:35 C 12 45 40.121 +57 14 54.20 V T08
2024-02-01 13:03:15 C 12 45 39.271 +57 14 58.09 V T08
2024-02-01 13:05:54 C 12 45 38.779 +57 15 00.54 V T08
2024-02-01 13:20:18 C 12 45 36.108 +57 15 12.35 V T08
2024-02-01 13:29:54 C 12 45 34.327 +57 15 20.09 V T08
2024-02-03 14:34:47 C 12 36 36.602 +57 52 38.75 V T05
2024-02-03 15:25:54 C 12 36 26.146 +57 53 14.39 V T05
2024-02-03 16:07:31 C 12 36 17.642 +57 53 42.43 V T05
2024-02-03 16:10:47 C 12 36 17.018 +57 53 44.88 V T05
2024-02-04 09:08:57 C 12 32 59.90 +58 05 30.3 V W53
2024-02-04 09:19:39 C 12 32 57.65 +58 05 37.3 V W53
2024-02-04 09:31:08 C 12 32 55.23 +58 05 45.3 V W53
2024-02-04 11:01:05 C 12 32 36.53 +58 06 43.8 V W53
2024-02-04 11:11:49 C 12 32 34.28 +58 06 50.4 V W53
2024-02-04 11:23:16 C 12 32 31.91 +58 06 57.8 V W53
2024-02-05 09:24:39 C 12 28 06.820 +58 21 26.06 V 703
2024-02-05 09:28:04 C 12 28 06.074 +58 21 28.44 V 703
2024-02-05 09:31:30 C 12 28 05.318 +58 21 30.64 V 703
2024-02-05 09:34:56 C 12 28 04.570 +58 21 33.01 V 703
2024-02-07 12:02:03 C 12 17 13.896 +58 50 20.90 V T05
2024-02-07 12:39:23 C 12 17 05.057 +58 50 40.99 V T05
2024-02-07 12:40:41 C 12 17 04.718 +58 50 41.68 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)