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
2006-04-28 06:33:48 C 11 01 45.16 +05 59 06.4 17.6 c 704
2006-04-28 06:48:53 C 11 01 44.03 +05 58 52.1 17.6 c 704
2006-04-29 20:33:01 C 10 59 08.71 +05 22 54.6 17.97 r 084
2006-04-29 20:35:08 C 10 59 08.53 +05 22 52.3 17.02 r 084
2006-04-30 19:40:40 C 10 57 40.87 +05 00 59.4 17.57 r 084
2006-05-01 20:21:12 C 10 56 12.91 +04 37 39.9 17.6 r 084
2006-05-01 20:23:20 C 10 56 12.73 +04 37 38.2 17.34 r 084
2006-05-03 20:03:08 C 10 53 40.72 +03 52 48.4 r 113
2006-05-03 20:04:48 C 10 53 40.67 +03 52 47.1 r 113
2006-05-03 20:06:23 C 10 53 40.55 +03 52 45.2 r 113
2006-05-03 20:07:58 C 10 53 40.49 +03 52 44.0 r 113
2006-05-23 03:51:42 C 10 44 58.38 -03 05 32.3 r 703
2006-05-23 04:01:07 C 10 44 58.41 -03 05 39.5 r 703
2006-05-23 04:10:32 C 10 44 58.41 -03 05 47.8 r 703
2006-07-22 09:48:38 C 11 43 58.33 -23 40 07.7 r E12
2006-07-22 09:56:04 C 11 43 58.72 -23 40 13.1 r E12
2006-07-22 10:03:26 C 11 43 59.12 -23 40 18.6 r E12
2006-07-22 10:10:48 C 11 43 59.55 -23 40 25.9 r E12
2006-08-16 08:52:16 C 12 15 12.49 -31 16 04.8 r E12
2006-08-16 09:08:47 C 12 15 13.17 -31 16 15.1 r E12
2006-08-16 09:25:15 C 12 15 13.82 -31 16 24.8 r E12
2006-11-15 11:25:08 C 12 06 00.20 +29 59 59.1 17.7 c 704
2006-11-15 11:43:07 C 12 06 01.41 +30 00 11.3 17.4 c 704
2006-11-15 12:01:57 C 12 06 02.80 +30 00 22.9 17.6 c 704
2006-11-15 12:21:23 C 12 06 04.20 +30 00 36.1 17.7 c 704
2006-11-24 03:46:43 C 12 22 02.66 +31 41 37.7 o 493
2006-11-24 04:18:02 C 12 22 04.96 +31 41 52.2 o 493
2006-11-24 04:42:55 C 12 22 06.73 +31 42 02.9 o 493
2006-11-29 11:06:40 C 12 31 51.29 +32 26 30.8 17.9 c 704
2006-11-29 11:45:10 C 12 31 54.04 +32 26 45.6 18.4 c 704
2006-11-29 12:04:35 C 12 31 55.52 +32 26 52.0 18.3 c 704
2006-12-01 10:37:23 C 12 35 27.53 +32 41 13.0 19.1 c 704
2006-12-01 10:55:56 C 12 35 28.96 +32 41 21.4 18.1 c 704
2006-12-01 11:14:42 C 12 35 30.29 +32 41 27.9 18.1 c 704
2006-12-01 11:33:15 C 12 35 31.66 +32 41 34.0 18.0 c 704
2006-12-01 11:51:48 C 12 35 32.92 +32 41 40.6 18.2 c 704
2006-12-17 10:19:04 C 13 02 12.30 +34 29 50.4 17.2 c 704
2006-12-17 10:38:14 C 13 02 13.41 +34 29 57.4 17.8 c 704
2006-12-17 10:58:09 C 13 02 14.57 +34 30 03.6 17.8 c 704
2006-12-17 11:17:17 C 13 02 15.70 +34 30 10.5 17.5 c 704
2006-12-17 11:38:58 C 13 02 16.94 +34 30 17.8 17.9 c 704
2006-12-30 04:28:23 C 13 18 13.21 +36 20 42.1 17.5 r 084
2006-12-30 04:32:33 C 13 18 13.41 +36 20 43.9 17.6 r 084
2006-12-31 05:16:20 C 13 19 13.60 +36 31 41.7 r 170
2006-12-31 05:17:33 C 13 19 13.63 +36 31 42.5 r 170
2006-12-31 05:23:41 C 13 19 13.89 +36 31 45.1 r 170
2007-01-24 00:42:52 C 13 22 47.03 +42 28 57.9 o A32
2007-01-24 00:53:45 C 13 22 46.61 +42 29 07.1 o A32
2007-01-24 01:04:26 C 13 22 46.14 +42 29 15.7 o A32
2007-01-24 01:14:17 C 13 22 45.73 +42 29 24.5 o A32
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)