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
2023-04-09 23:47:05 B 11 13 34.28 +18 47 03.4 Z M45
2023-04-09 23:49:49 B 11 13 33.90 +18 47 01.0 Z M45
2023-04-09 23:55:57 B 11 13 33.16 +18 46 55.3 Z M45
2023-04-10 03:11:04 C 11 13 10.759 +18 44 16.01 V W68
2023-04-10 03:15:41 C 11 13 10.164 +18 44 11.58 V W68
2023-04-10 03:38:01 C 11 13 07.392 +18 43 49.22 V W68
2023-04-10 03:46:03 C 11 13 06.370 +18 43 41.45 V W68
2023-04-10 05:01:14 C 11 12 58.181 +18 42 02.20 Z U76
2023-04-10 05:13:05 C 11 12 56.693 +18 41 50.64 Z U76
2023-04-10 05:24:00 C 11 12 55.330 +18 41 40.02 Z U76
2023-04-10 14:16:41 C 11 11 52.40 +18 32 54.7 V D29
2023-04-10 14:37:03 C 11 11 49.90 +18 32 34.4 V D29
2023-04-10 14:57:25 C 11 11 47.39 +18 32 14.1 V D29
2023-04-11 09:16:26 C 11 09 41.093 +18 14 04.42 V T05
2023-04-11 09:20:33 C 11 09 40.594 +18 14 00.35 V T05
2023-04-11 09:25:08 C 11 09 40.054 +18 13 55.78 V T05
2023-04-11 09:29:44 C 11 09 39.506 +18 13 51.02 V T05
2023-04-11 17:30:59 C 11 08 46.07 +18 05 33.7 q 168
2023-04-11 18:38:00 C 11 08 38.32 +18 04 26.2 q 168
2023-04-11 19:45:01 C 11 08 30.59 +18 03 17.9 q 168
2023-04-12 06:33:30 C 11 07 19.229 +17 52 32.20 V 703
2023-04-12 06:41:11 C 11 07 18.401 +17 52 24.56 V 703
2023-04-12 06:48:54 C 11 07 17.472 +17 52 16.43 V 703
2023-04-12 06:56:34 C 11 07 16.576 +17 52 08.54 V 703
2023-04-12 16:09:39 C 11 06 17.66 +17 42 42.9 Y N42
2023-04-12 16:11:02 C 11 06 17.51 +17 42 41.4 Y N42
2023-04-12 16:16:33 C 11 06 16.89 +17 42 35.8 Y N42
2023-04-13 22:15:45 B 11 03 08.97 +17 11 50.0 Z M45
2023-04-13 22:17:52 B 11 03 08.75 +17 11 47.4 Z M45
2023-04-13 22:19:59 B 11 03 08.47 +17 11 45.3 Z M45
2023-04-14 02:35:30 B 11 02 43.48 +17 07 22.5 V H89
2023-04-14 04:19:14 B 11 02 32.46 +17 05 35.4 V H89
2023-04-14 05:26:20 B 11 02 25.54 +17 04 24.1 V H89
2023-04-14 18:19:01 C 11 01 10.17 +16 51 01.0 q 168
2023-04-14 19:22:01 C 11 01 03.83 +16 49 55.0 q 168
2023-04-15 05:42:29 C 11 00 04.417 +16 39 18.50 V G96
2023-04-15 05:49:54 C 11 00 03.661 +16 39 10.76 V G96
2023-04-15 05:57:22 C 11 00 02.912 +16 39 02.92 V G96
2023-04-15 06:04:48 C 11 00 02.164 +16 38 55.14 V G96
2023-04-15 08:13:52 C 10 59 50.254 +16 36 45.61 V T05
2023-04-15 08:21:21 C 10 59 49.505 +16 36 37.69 V T05
2023-04-15 08:27:14 C 10 59 48.907 +16 36 31.50 V T05
2023-04-15 09:01:27 C 10 59 45.458 +16 35 55.64 V T05
2023-04-15 21:27:20 B 10 58 35.97 +16 22 46.0 Z M45
2023-04-15 21:30:18 B 10 58 35.68 +16 22 43.1 Z M45
2023-04-15 21:33:07 B 10 58 35.42 +16 22 39.8 Z M45
2023-04-16 02:20:04 B 10 58 09.80 +16 17 39.7 V H89
2023-04-16 02:25:22 C 10 58 09.175 +16 18 02.95 V W68
2023-04-16 02:29:57 C 10 58 08.707 +16 17 58.20 V W68
2023-04-16 02:38:02 C 10 58 07.954 +16 17 49.42 V W68
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)