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
2023-04-23 07:30:12 C 10 45 15.818 +13 14 13.12 V U68
2023-04-23 07:35:51 C 10 45 15.473 +13 14 07.08 V U68
2023-04-24 05:12:48 C 10 44 02.404 +12 51 14.08 V 703
2023-04-24 05:20:23 C 10 44 01.936 +12 51 06.01 V 703
2023-04-24 05:27:57 C 10 44 01.496 +12 50 57.91 V 703
2023-04-24 05:35:32 C 10 44 01.025 +12 50 49.85 V 703
2023-04-28 19:37:01 B 10 38 58.99 +10 54 56.2 Z M45
2023-04-28 19:43:06 B 10 38 58.74 +10 54 51.3 Z M45
2023-04-28 21:24:27 B 10 38 54.66 +10 53 03.7 Z M45
2023-04-28 21:27:36 B 10 38 54.53 +10 53 00.7 Z M45
2023-05-03 07:50:34 C 10 35 47.491 +09 03 18.14 V T05
2023-05-03 08:14:00 C 10 35 46.846 +09 02 54.28 V T05
2023-05-03 08:21:47 C 10 35 46.632 +09 02 46.32 V T05
2023-05-03 08:40:27 C 10 35 46.135 +09 02 26.70 V T05
2023-05-03 19:42:48 C 10 35 32.59 +08 51 05.1 V G17
2023-05-03 19:51:36 C 10 35 32.40 +08 50 55.7 V G17
2023-05-03 20:00:23 C 10 35 32.19 +08 50 47.0 V G17
2023-05-03 20:32:26 C 10 35 31.457 +08 50 13.52 V A16
2023-05-03 20:53:28 C 10 35 30.943 +08 49 51.96 V A16
2023-05-03 21:14:30 C 10 35 30.449 +08 49 30.61 V A16
2023-05-05 20:03:21 C 10 34 41.36 +08 02 04.1 V 069
2023-05-05 20:09:22 C 10 34 41.25 +08 01 58.1 V 069
2023-05-05 20:15:21 C 10 34 41.17 +08 01 52.3 V 069
2023-05-05 20:21:21 C 10 34 41.05 +08 01 45.9 V 069
2023-05-05 20:27:22 C 10 34 40.95 +08 01 40.0 V 069
2023-05-05 20:33:21 C 10 34 40.85 +08 01 34.0 V 069
2023-05-05 20:39:21 C 10 34 40.74 +08 01 28.3 V 069
2023-05-05 20:45:22 C 10 34 40.65 +08 01 22.0 V 069
2023-05-05 20:51:21 C 10 34 40.53 +08 01 15.9 V 069
2023-05-05 20:57:21 C 10 34 40.42 +08 01 09.7 V 069
2023-05-05 20:59:48 C 10 34 40.38 +08 01 07.2 V 069
2023-05-05 21:05:49 C 10 34 40.30 +08 01 01.3 V 069
2023-05-05 21:11:49 C 10 34 40.16 +08 00 55.1 V 069
2023-05-05 21:17:48 C 10 34 40.10 +08 00 49.2 V 069
2023-05-05 21:23:49 C 10 34 39.97 +08 00 43.6 V 069
2023-05-06 18:53:34 S 10 34 23.44 +07 39 22.9 L C51
2023-05-06 20:21:13 C 10 34 22.01 +07 37 40.2 V 069
2023-05-06 20:28:11 C 10 34 21.91 +07 37 33.5 V 069
2023-05-06 20:34:10 C 10 34 21.82 +07 37 27.4 V 069
2023-05-06 20:40:11 C 10 34 21.73 +07 37 21.4 V 069
2023-05-06 20:46:11 C 10 34 21.65 +07 37 15.0 V 069
2023-05-06 20:52:10 C 10 34 21.57 +07 37 09.1 V 069
2023-05-06 20:58:11 C 10 34 21.49 +07 37 03.1 V 069
2023-05-06 21:04:11 C 10 34 21.40 +07 36 57.1 V 069
2023-05-06 21:10:10 C 10 34 21.32 +07 36 51.1 V 069
2023-05-06 21:16:11 C 10 34 21.23 +07 36 44.9 V 069
2023-05-06 21:22:11 C 10 34 21.14 +07 36 39.2 V 069
2023-05-06 21:24:51 C 10 34 21.11 +07 36 36.7 V 069
2023-05-06 21:30:50 C 10 34 21.04 +07 36 30.2 V 069
2023-05-06 21:36:50 C 10 34 20.93 +07 36 24.4 V 069
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)