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
2023-05-18 18:19:18 C 10 35 08.520 +03 00 44.17 V M22
2023-05-22 04:04:31 C 10 36 40.007 +01 43 55.31 V G96
2023-05-22 04:12:45 C 10 36 40.158 +01 43 47.53 V G96
2023-05-22 04:20:57 C 10 36 40.306 +01 43 39.94 V G96
2023-05-22 04:29:09 C 10 36 40.457 +01 43 32.34 V G96
2023-05-24 18:25:20 C 10 38 09.478 +00 46 29.42 V M22
2023-05-24 18:29:19 C 10 38 09.487 +00 46 25.21 V M22
2023-05-24 18:37:14 C 10 38 09.698 +00 46 18.66 V M22
2023-05-24 18:53:10 C 10 38 10.066 +00 46 03.61 V M22
2023-06-10 03:39:06 C 10 52 34.367 -05 09 20.02 V G96
2023-06-10 03:46:30 C 10 52 34.680 -05 09 26.57 V G96
2023-06-10 03:55:37 C 10 52 35.080 -05 09 34.78 V G96
2023-06-10 04:10:35 C 10 52 35.724 -05 09 47.88 V G96
2023-06-12 23:45:29 C 10 55 46.968 -06 09 46.15 V W68
2023-06-12 23:50:46 C 10 55 47.213 -06 09 49.68 V W68
2023-06-13 00:00:08 C 10 55 47.599 -06 09 59.15 V W68
2023-06-13 00:16:46 C 10 55 48.396 -06 10 13.58 V W68
2023-06-15 23:29:46 C 10 59 20.976 -07 13 35.11 V W68
2023-06-15 23:33:40 C 10 59 21.206 -07 13 38.57 V W68
2023-06-15 23:42:48 C 10 59 21.576 -07 13 46.60 V W68
2023-06-16 00:05:13 C 10 59 22.673 -07 14 06.86 V W68
2023-07-05 17:06:36 C 11 26 53.568 -14 16 22.91 V M22
2023-07-05 17:11:10 C 11 26 53.904 -14 16 27.34 V M22
2023-07-05 17:19:43 C 11 26 54.403 -14 16 35.29 V M22
2023-07-05 17:43:38 C 11 26 55.901 -14 16 57.07 V M22
2023-07-14 00:16:39 C 11 40 07.308 -17 15 12.13 V W68
2023-07-14 00:21:14 C 11 40 07.562 -17 15 16.42 V W68
2023-07-14 00:35:54 C 11 40 08.563 -17 15 28.98 V W68
2023-07-14 00:45:12 C 11 40 09.120 -17 15 37.87 V W68
2023-08-03 23:46:22 C 12 16 50.736 -24 43 46.92 V W68
2023-08-04 00:05:04 C 12 16 52.075 -24 44 03.12 V W68
2023-08-04 00:09:43 C 12 16 52.399 -24 44 08.38 V W68
2023-08-04 00:17:38 C 12 16 53.066 -24 44 14.46 V W68
2023-08-13 23:53:15 C 12 35 22.452 -28 05 30.91 V W68
2023-08-13 23:57:54 C 12 35 22.807 -28 05 33.90 V W68
2023-08-14 00:05:55 C 12 35 23.438 -28 05 39.52 V W68
2023-08-14 00:20:25 C 12 35 24.569 -28 05 52.01 V W68
2023-11-24 14:58:51 C 13 01 45.403 +35 12 20.95 V T05
2023-11-24 15:06:41 C 13 01 45.674 +35 12 29.02 V T05
2023-11-24 15:32:20 C 13 01 46.483 +35 12 55.76 V T05
2023-12-04 15:12:13 C 13 11 39.499 +38 28 03.11 V T05
2023-12-04 15:31:22 C 13 11 40.217 +38 28 17.65 V T05
2023-12-04 15:43:08 C 13 11 40.649 +38 28 26.33 V T05
2023-12-04 15:48:00 C 13 11 40.824 +38 28 30.00 V T05
2023-12-06 15:14:42 C 13 13 45.835 +39 00 51.05 V T05
2023-12-06 15:20:36 C 13 13 46.042 +39 00 55.26 V T05
2023-12-06 15:35:16 C 13 13 46.630 +39 01 05.74 V T05
2023-12-06 15:55:45 C 13 13 47.335 +39 01 20.78 V T05
2023-12-07 14:47:33 C 13 14 47.863 +39 16 29.06 V T08
2023-12-07 14:51:32 C 13 14 48.031 +39 16 31.98 V T08
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)