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
2005-03-21 15:01:22 C 15 36 15.38 -12 47 36.1 19.0 c 608
2005-03-22 01:04:18 C 15 36 18.52 -12 56 51.1 o 084
2005-03-23 00:46:06 C 15 36 22.24 -13 18 45.1 o 084
2005-04-02 01:28:53 C 15 32 30.64 -17 41 48.2 r 138
2005-04-02 01:53:24 C 15 32 29.58 -17 42 19.3 r 138
2005-04-02 02:17:53 C 15 32 28.61 -17 42 49.7 r 138
2005-04-03 14:20:19 C 15 31 03.37 -18 29 11.8 r E12
2005-04-03 14:38:12 C 15 31 02.47 -18 29 35.8 r E12
2005-04-03 14:56:10 C 15 31 01.58 -18 30 00.2 r E12
2005-04-03 15:14:21 C 15 31 00.67 -18 30 24.9 r E12
2005-04-04 10:36:02 C 15 30 06.58 -18 57 00.9 17.0 c 704
2005-04-04 10:50:49 C 15 30 05.69 -18 57 21.2 19.0 c 704
2005-04-04 11:05:27 C 15 30 04.97 -18 57 40.9 17.2 c 704
2005-04-04 11:20:20 C 15 30 04.17 -18 58 01.3 17.3 c 704
2005-04-10 12:32:49 C 15 20 36.35 -22 36 04.9 16.8 c 608
2005-04-10 12:48:19 C 15 20 34.89 -22 36 30.5 17.0 c 608
2005-04-10 13:03:40 C 15 20 33.49 -22 36 55.1 16.9 c 608
2005-04-11 09:33:06 C 15 18 46.45 -23 11 02.1 o 699
2005-04-11 09:51:33 C 15 18 44.67 -23 11 32.6 o 699
2005-04-11 10:10:00 C 15 18 42.85 -23 12 03.3 o 699
2005-04-11 10:28:29 C 15 18 41.14 -23 12 35.4 o 699
2005-04-16 06:05:10 C 15 06 07.04 -26 39 18.4 834
2005-04-16 06:29:28 C 15 06 03.69 -26 40 04.3 834
2005-04-16 06:47:32 C 15 06 01.22 -26 40 38.4 834
2005-04-20 16:13:17 C 14 50 22.82 -30 09 40.8 r E12
2005-04-20 16:26:12 C 14 50 20.50 -30 10 07.2 r E12
2005-04-20 16:39:05 C 14 50 18.19 -30 10 33.2 r E12
2005-04-20 16:51:55 C 14 50 15.88 -30 10 59.2 r E12
2005-05-05 13:59:56 C 13 21 40.61 -41 57 52.7 r E12
2005-05-05 14:15:25 C 13 21 35.46 -41 58 16.4 r E12
2005-05-05 14:30:52 C 13 21 30.31 -41 58 40.0 r E12
2005-05-05 14:46:20 C 13 21 25.15 -41 59 03.5 r E12
2005-09-23 11:37:43 C 08 40 28.59 +21 41 13.1 r 703
2005-09-23 11:44:50 C 08 40 29.56 +21 41 19.7 r 703
2005-09-23 11:51:58 C 08 40 30.57 +21 41 25.0 r 703
2005-09-23 11:59:07 C 08 40 31.44 +21 41 30.8 r 703
2005-10-29 11:30:32 C 10 42 27.18 +24 37 04.9 r 703
2005-10-29 11:38:23 C 10 42 28.22 +24 37 04.5 r 703
2005-10-29 11:46:07 C 10 42 29.26 +24 37 02.3 r 703
2005-10-29 11:53:51 C 10 42 30.31 +24 36 59.8 r 703
2006-01-04 11:28:46 C 13 27 57.08 +15 50 58.2 19.3 c 704
2006-01-04 11:48:24 C 13 27 58.38 +15 50 53.1 19.0 c 704
2006-01-04 12:25:34 C 13 28 00.97 +15 50 45.0 19.0 c 704
2006-01-04 12:44:27 C 13 28 02.28 +15 50 40.7 19.0 c 704
2006-02-01 09:52:49 C 14 03 56.08 +14 24 28.9 r 703
2006-02-01 10:04:03 C 14 03 56.30 +14 24 29.0 r 703
2006-02-01 10:15:16 C 14 03 56.62 +14 24 29.0 r 703
2006-02-01 10:26:37 C 14 03 56.91 +14 24 28.9 r 703
2006-02-03 10:56:16 C 14 05 20.58 +14 24 24.9 18.2 c 704
2006-02-03 11:15:43 C 14 05 21.00 +14 24 25.2 18.4 c 704
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)