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
2006-03-25 06:56:05 C 12 54 01.90 +15 53 30.6 r 703
2006-03-25 07:07:48 C 12 53 59.92 +15 53 27.8 r 703
2006-03-25 07:19:34 C 12 53 57.91 +15 53 24.4 r 703
2006-03-30 19:58:09 C 12 31 46.03 +15 07 45.1 r A30
2006-03-30 19:59:38 C 12 31 45.77 +15 07 44.5 r A30
2006-03-30 20:01:07 C 12 31 45.52 +15 07 43.9 r A30
2006-03-30 20:06:44 C 12 31 44.53 +15 07 41.4 r A30
2006-03-31 06:34:35 C 12 29 56.97 +15 03 01.7 c 699
2006-03-31 07:13:53 C 12 29 49.99 +15 02 43.6 c 699
2006-03-31 07:53:17 C 12 29 43.01 +15 02 25.7 c 699
2006-03-31 08:32:44 C 12 29 36.03 +15 02 07.1 c 699
2006-03-31 22:35:31 C 12 27 13.14 +14 55 18.5 r A13
2006-03-31 22:36:35 C 12 27 12.96 +14 55 18.0 r A13
2006-03-31 22:57:44 C 12 27 09.24 +14 55 07.7 r A13
2006-04-04 20:45:49 C 12 11 20.42 +14 02 30.8 o J65
2006-04-04 20:47:25 C 12 11 20.13 +14 02 28.8 o J65
2006-04-04 22:07:30 C 12 11 06.48 +14 01 38.5 o J65
2006-04-04 22:08:02 C 12 11 06.46 +14 01 39.3 o J65
2006-04-08 06:12:21 C 11 58 06.06 +13 07 05.6 r 703
2006-04-08 06:28:37 C 11 58 03.36 +13 06 53.6 r 703
2006-04-08 06:41:43 C 11 58 01.20 +13 06 44.1 r 703
2006-04-08 07:20:30 C 11 57 54.79 +13 06 15.4 r 703
2006-04-08 21:29:37 C 11 55 42.19 +12 55 39.4 16.3 r 130
2006-04-08 21:31:03 C 11 55 41.96 +12 55 38.3 16.5 r 130
2006-04-08 21:32:30 C 11 55 41.72 +12 55 37.3 16.4 r 130
2006-04-08 21:34:39 C 11 55 41.38 +12 55 35.7 16.6 r 130
2006-04-08 21:50:30 C 11 55 38.45 +12 55 18.3 16.13 r 084
2006-04-08 21:53:37 C 11 55 37.93 +12 55 16.1 16.34 r 084
2006-04-11 20:41:44 C 11 44 56.59 +11 59 32.5 16.35 r 084
2006-04-11 20:44:52 C 11 44 56.17 +11 59 30.2 16.5 r 084
2006-04-18 05:37:14 C 11 24 41.32 +09 45 59.5 r 703
2006-04-18 05:48:55 C 11 24 39.88 +09 45 49.6 r 703
2006-04-18 06:00:33 C 11 24 38.41 +09 45 38.2 r 703
2006-04-18 06:12:11 C 11 24 36.97 +09 45 27.7 r 703
2006-04-20 04:39:03 C 11 19 20.26 +09 02 31.7 16.4 c 704
2006-04-20 04:54:28 C 11 19 18.51 +09 02 17.5 17.1 c 704
2006-04-20 05:10:07 C 11 19 16.68 +09 02 02.8 16.8 c 704
2006-04-20 05:25:34 C 11 19 14.88 +09 01 48.7 16.9 c 704
2006-04-20 05:41:02 C 11 19 13.07 +09 01 33.8 16.7 c 704
2006-04-20 20:52:45 C 11 17 35.34 +08 47 17.0 r A13
2006-04-20 20:54:54 C 11 17 35.10 +08 47 14.9 r A13
2006-04-20 21:11:06 C 11 17 33.30 +08 46 59.8 r A13
2006-04-20 21:13:13 C 11 17 33.07 +08 46 57.9 r A13
2006-04-21 04:06:14 C 11 16 49.96 +08 40 36.1 o 699
2006-04-21 04:45:34 C 11 16 45.59 +08 39 59.2 o 699
2006-04-21 05:24:59 C 11 16 41.25 +08 39 22.6 o 699
2006-04-21 06:04:24 C 11 16 36.87 +08 38 45.2 o 699
2006-04-21 19:47:41 C 11 15 12.76 +08 25 47.2 o 198
2006-04-21 19:49:05 C 11 15 12.62 +08 25 45.9 o 198
2006-04-21 19:51:10 C 11 15 12.39 +08 25 43.9 o 198
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)