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
2006-02-03 11:35:09 C 14 05 21.49 +14 24 25.4 18.5 c 704
2006-02-03 11:54:39 C 14 05 21.91 +14 24 25.4 18.8 c 704
2006-02-03 12:13:46 C 14 05 22.35 +14 24 25.6 18.3 c 704
2006-02-22 09:58:22 C 14 06 09.30 +15 02 51.5 18.6 c 704
2006-02-22 10:34:23 C 14 06 07.86 +15 02 58.4 19.3 c 704
2006-02-22 10:52:32 C 14 06 07.43 +15 03 01.5 18.1 c 704
2006-02-22 11:10:50 C 14 06 06.83 +15 03 03.9 18.0 c 704
2006-02-25 08:37:53 C 14 03 45.40 +15 14 08.1 o 699
2006-02-25 09:17:21 C 14 03 43.62 +15 14 14.9 o 699
2006-02-25 09:56:50 C 14 03 41.83 +15 14 22.0 o 699
2006-02-25 10:36:21 C 14 03 40.10 +15 14 28.7 o 699
2006-02-28 11:03:57 C 14 00 16.92 +15 26 47.2 r 703
2006-02-28 11:11:56 C 14 00 16.45 +15 26 48.6 r 703
2006-02-28 11:19:58 C 14 00 15.98 +15 26 49.8 r 703
2006-02-28 11:28:00 C 14 00 15.51 +15 26 51.1 r 703
2006-03-12 00:15:12 C 13 38 01.61 +16 08 22.6 r 084
2006-03-12 00:18:19 C 13 38 01.25 +16 08 23.1 r 084
2006-03-13 02:04:57 C 13 35 09.19 +16 10 43.6 r 084
2006-03-13 22:19:23 C 13 32 50.01 +16 12 18.3 r A13
2006-03-13 22:55:43 C 13 32 45.58 +16 12 21.8 r A13
2006-03-13 23:05:55 C 13 32 44.35 +16 12 22.1 r A13
2006-03-13 23:48:51 C 13 32 39.08 +16 12 25.7 r A13
2006-03-16 00:06:55 C 13 26 42.53 +16 14 39.7 r 084
2006-03-16 00:10:03 C 13 26 42.16 +16 14 40.7 r 084
2006-03-18 00:44:02 C 13 20 16.78 +16 14 53.5 r 084
2006-03-19 08:52:17 C 13 15 47.80 +16 13 54.0 16.7 c 704
2006-03-19 09:08:55 C 13 15 45.29 +16 13 52.9 16.8 c 704
2006-03-19 09:25:16 C 13 15 42.86 +16 13 52.1 16.8 c 704
2006-03-19 09:41:47 C 13 15 40.40 +16 13 50.9 16.5 c 704
2006-03-19 09:58:40 C 13 15 37.89 +16 13 50.2 16.7 c 704
2006-03-21 08:15:53 C 13 08 51.77 +16 10 00.6 16.7 c 704
2006-03-21 08:32:38 C 13 08 49.07 +16 09 58.8 17.2 c 704
2006-03-21 08:49:32 C 13 08 46.49 +16 09 56.8 16.8 c 704
2006-03-21 09:06:50 C 13 08 43.75 +16 09 54.8 16.8 c 704
2006-03-21 09:23:24 C 13 08 41.17 +16 09 53.2 17.0 c 704
2006-03-22 08:29:49 C 13 05 10.65 +16 06 56.2 16.6 c 704
2006-03-22 08:46:33 C 13 05 07.94 +16 06 54.6 16.7 c 704
2006-03-22 09:03:06 C 13 05 05.29 +16 06 51.9 16.8 c 704
2006-03-22 09:19:41 C 13 05 02.63 +16 06 49.3 16.7 c 704
2006-03-22 09:37:03 C 13 04 59.85 +16 06 46.8 16.8 c 704
2006-03-23 00:10:14 C 13 02 44.73 +16 04 22.3 r 084
2006-03-23 00:13:22 C 13 02 44.28 +16 04 21.8 r 084
2006-03-23 07:57:08 C 13 01 32.12 +16 03 15.1 16.3 c 704
2006-03-23 08:12:46 C 13 01 29.57 +16 03 12.6 16.3 c 704
2006-03-23 08:28:25 C 13 01 26.96 +16 03 09.4 16.3 c 704
2006-03-23 08:44:04 C 13 01 24.40 +16 03 07.0 16.2 c 704
2006-03-23 21:10:20 C 12 59 27.73 +16 00 40.6 c 127
2006-03-23 21:16:31 C 12 59 26.71 +16 00 39.5 c 127
2006-03-23 21:29:38 C 12 59 24.59 +16 00 37.0 c 127
2006-03-25 06:44:18 C 12 54 03.88 +15 53 33.1 r 703
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)