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
2022-04-12 06:41:27 C 14 17 05.947 -15 13 20.89 V W68
2022-04-12 07:38:55 C 14 16 57.706 -15 15 02.38 V 703
2022-04-12 07:46:57 C 14 16 56.359 -15 15 11.95 V 703
2022-04-12 07:54:59 C 14 16 55.024 -15 15 21.46 V 703
2022-04-12 08:03:01 C 14 16 53.677 -15 15 30.60 V 703
2022-04-13 03:21:19 C 14 13 47.729 -15 37 48.65 V W68
2022-04-13 03:26:54 C 14 13 46.752 -15 37 55.42 V W68
2022-04-13 04:02:51 C 14 13 40.570 -15 38 38.80 V W68
2022-04-13 04:19:09 C 14 13 37.759 -15 38 58.42 V W68
2022-04-14 03:10:20 C 14 09 48.602 -16 06 21.20 V W68
2022-04-14 03:14:54 C 14 09 47.784 -16 06 26.75 V W68
2022-04-14 03:22:42 C 14 09 46.390 -16 06 36.29 V W68
2022-04-14 03:37:42 C 14 09 43.716 -16 06 54.65 V W68
2022-04-14 06:08:01 C 14 09 18.040 -16 10 30.22 V 703
2022-04-14 06:15:47 C 14 09 16.643 -16 10 39.65 V 703
2022-04-14 06:31:17 C 14 09 13.709 -16 10 56.14 V 703
2022-04-20 02:32:53 C 13 42 41.61 -19 02 28.5 V W46
2022-04-20 02:48:55 C 13 42 38.19 -19 02 48.7 V W46
2022-04-20 03:01:31 C 13 42 35.51 -19 03 04.1 V W46
2022-04-20 07:12:44 C 13 41 40.920 -19 07 33.06 V W68
2022-04-20 07:18:10 C 13 41 39.751 -19 07 39.29 V W68
2022-04-20 07:28:15 C 13 41 37.596 -19 07 51.46 V W68
2022-04-20 07:45:31 C 13 41 33.886 -19 08 11.90 V W68
2022-04-20 07:52:40 C 13 41 33.698 -19 09 00.43 V 703
2022-04-20 08:00:56 C 13 41 31.902 -19 09 10.51 V 703
2022-04-20 08:09:12 C 13 41 30.116 -19 09 20.41 V 703
2022-04-20 08:17:28 C 13 41 28.320 -19 09 30.56 V 703
2022-04-21 05:47:57 C 13 36 57.514 -19 35 03.26 V W68
2022-04-21 05:52:52 C 13 36 56.419 -19 35 09.06 V W68
2022-04-21 06:00:44 C 13 36 54.682 -19 35 18.53 V W68
2022-04-21 06:17:26 C 13 36 50.995 -19 35 38.29 V W68
2022-04-24 05:02:18 C 13 21 25.534 -20 59 39.52 V W68
2022-04-24 05:07:32 C 13 21 24.312 -20 59 45.49 V W68
2022-04-24 05:17:00 C 13 21 22.097 -20 59 56.29 V W68
2022-04-24 05:32:38 C 13 21 18.458 -21 00 14.04 V W68
2022-04-24 08:12:25 C 13 20 42.688 -21 03 55.80 V 703
2022-04-24 08:20:24 C 13 20 40.848 -21 04 04.69 V 703
2022-04-24 08:28:23 C 13 20 38.980 -21 04 13.87 V 703
2022-04-24 08:36:21 C 13 20 37.129 -21 04 22.94 V 703
2022-04-25 05:22:43 C 13 15 56.582 -21 27 31.39 V W68
2022-04-25 05:26:43 C 13 15 55.630 -21 27 35.86 V W68
2022-04-25 05:36:57 C 13 15 53.220 -21 27 47.20 V W68
2022-04-25 05:54:58 C 13 15 48.979 -21 28 07.07 V W68
2022-04-25 05:54:58 C 13 15 50.555 -21 28 46.06 V G96
2022-04-25 06:02:24 C 13 15 48.798 -21 28 54.37 V G96
2022-04-25 06:09:53 C 13 15 47.027 -21 29 02.98 V G96
2022-04-25 06:17:19 C 13 15 45.266 -21 29 11.33 V G96
2022-04-28 05:53:03 C 12 59 19.910 -22 46 56.50 V 703
2022-04-28 06:00:06 C 12 59 18.211 -22 47 03.77 V 703
2022-04-28 06:07:09 C 12 59 16.505 -22 47 11.04 V 703
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)