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
2023-04-16 02:52:09 C 10 58 06.578 +16 17 34.66 V W68
2023-04-16 03:56:54 B 10 58 00.54 +16 15 57.7 V H89
2023-04-16 05:28:58 B 10 57 51.80 +16 14 20.5 V H89
2023-04-16 05:58:35 C 10 57 49.568 +16 13 55.45 V 703
2023-04-16 06:06:12 C 10 57 48.827 +16 13 47.28 V 703
2023-04-16 06:13:48 C 10 57 48.092 +16 13 39.36 V 703
2023-04-16 06:21:24 C 10 57 47.376 +16 13 31.26 V 703
2023-04-16 14:10:00 C 10 57 05.80 +16 05 19.2 V D29
2023-04-16 14:30:22 C 10 57 03.89 +16 04 57.6 V D29
2023-04-16 14:50:44 C 10 57 01.98 +16 04 36.1 V D29
2023-04-16 17:28:01 C 10 56 48.60 +16 01 42.5 q 168
2023-04-16 18:41:01 C 10 56 41.92 +16 00 25.3 q 168
2023-04-16 19:40:01 C 10 56 36.52 +15 59 22.8 q 168
2023-04-17 08:45:56 C 10 55 28.855 +15 45 48.64 V T05
2023-04-17 08:50:30 C 10 55 28.430 +15 45 44.03 V T05
2023-04-17 08:57:54 C 10 55 27.751 +15 45 36.07 V T05
2023-04-17 09:24:07 C 10 55 25.368 +15 45 08.10 V T05
2023-04-18 17:31:00 C 10 52 48.46 +15 10 57.6 q 168
2023-04-18 18:49:01 C 10 52 42.03 +15 09 34.8 q 168
2023-04-18 20:07:01 C 10 52 35.71 +15 08 11.4 q 168
2023-04-18 21:32:54 C 10 52 29.23 +15 06 45.8 V M50
2023-04-18 21:39:16 C 10 52 28.72 +15 06 39.2 V M50
2023-04-19 05:50:15 C 10 51 50.735 +14 58 01.96 V 703
2023-04-19 05:58:32 C 10 51 50.090 +14 57 52.99 V 703
2023-04-19 06:06:46 C 10 51 49.388 +14 57 44.39 V 703
2023-04-19 06:15:02 C 10 51 48.722 +14 57 35.32 V 703
2023-04-19 20:22:05 C 10 50 45.83 +14 42 33.2 V M50
2023-04-19 20:31:24 C 10 50 45.10 +14 42 23.3 V M50
2023-04-19 20:40:19 B 10 50 44.472 +14 42 10.87 Z K35
2023-04-19 20:44:50 B 10 50 44.117 +14 42 06.44 Z K35
2023-04-19 20:47:04 B 10 50 43.949 +14 42 04.07 Z K35
2023-04-21 08:09:01 C 10 48 14.628 +14 04 39.25 V T05
2023-04-21 08:13:36 C 10 48 14.294 +14 04 34.64 V T05
2023-04-21 08:21:43 C 10 48 13.711 +14 04 25.82 V T05
2023-04-21 08:35:57 C 10 48 12.658 +14 04 10.38 V T05
2023-04-21 19:27:06 C 10 47 30.14 +13 52 24.7 c M31
2023-04-21 19:31:23 C 10 47 29.85 +13 52 19.9 c M31
2023-04-21 19:36:45 C 10 47 29.48 +13 52 14.5 c M31
2023-04-21 20:00:35 B 10 47 28.10 +13 51 51.7 V L65
2023-04-21 20:07:48 B 10 47 27.60 +13 51 43.3 V L65
2023-04-21 20:15:00 B 10 47 27.10 +13 51 37.3 V L65
2023-04-22 21:15:26 C 10 45 52.77 +13 25 02.9 X G02
2023-04-22 21:20:49 C 10 45 52.42 +13 24 57.1 X G02
2023-04-22 21:26:12 C 10 45 52.07 +13 24 51.3 X G02
2023-04-23 02:10:12 C 10 45 35.304 +13 20 18.10 V W68
2023-04-23 02:15:24 C 10 45 34.934 +13 20 12.34 V W68
2023-04-23 02:23:12 C 10 45 34.445 +13 20 04.06 V W68
2023-04-23 02:38:54 C 10 45 33.430 +13 19 47.32 V W68
2023-04-23 06:55:05 C 10 45 18.026 +13 14 50.69 V U68
2023-04-23 07:00:44 C 10 45 17.689 +13 14 44.76 V U68
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)