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
2021-03-19 15:24:30 C 16 56 31.523 -23 13 48.27 U F51
2021-04-19 13:56:25 C 18 38 02.94 -40 37 53.5 V T08
2021-04-19 14:01:03 C 18 38 03.82 -40 38 02.1 V T08
2021-04-19 14:11:41 C 18 38 05.78 -40 38 22.3 V T08
2021-04-27 13:22:04 C 19 22 32.94 -46 52 11.1 V T08
2021-04-27 13:27:23 C 19 22 34.45 -46 52 21.9 V T08
2021-04-27 13:36:42 C 19 22 36.83 -46 52 40.4 V T08
2021-04-27 13:51:20 C 19 22 40.73 -46 53 09.5 V T08
2021-04-29 05:27:44 C 19 33 58.35 -48 12 09.6 q X74
2021-04-29 05:46:30 C 19 34 03.85 -48 12 49.1 q X74
2021-04-29 06:05:13 C 19 34 09.20 -48 13 27.1 q X74
2021-04-29 13:49:49 C 19 36 27.14 -48 29 09.8 V T05
2021-04-29 13:52:27 C 19 36 28.02 -48 29 14.9 V T05
2021-04-29 13:55:06 C 19 36 28.85 -48 29 20.1 V T05
2021-04-29 14:00:23 C 19 36 30.36 -48 29 30.8 V T05
2021-04-29 14:01:03 C 19 36 30.59 -48 29 32.6 V T05
2021-04-29 14:17:05 C 19 36 35.18 -48 30 05.1 V T05
2021-04-29 14:34:16 C 19 36 40.09 -48 30 39.6 V T05
2021-05-05 05:16:42 C 20 23 02.53 -52 47 24.3 q X74
2021-05-05 05:37:16 C 20 23 10.40 -52 48 02.7 q X74
2021-05-05 05:57:54 C 20 23 18.30 -52 48 40.7 q X74
2021-05-24 16:21:29 S 00 19 36.941 -55 29 07.76 L C51
2021-05-24 19:29:49 S 00 21 08.866 -55 24 29.99 L C51
2021-05-24 21:03:53 S 00 21 54.667 -55 22 10.42 L C51
2021-05-24 22:37:57 S 00 22 40.375 -55 19 49.08 L C51
2021-05-25 00:12:12 S 00 23 25.994 -55 17 25.87 L C51
2021-05-25 01:46:16 S 00 24 11.390 -55 15 03.06 L C51
2021-05-25 04:54:35 S 00 25 42.127 -55 10 13.22 L C51
2021-05-25 06:28:39 S 00 26 27.334 -55 07 47.64 L C51
2021-05-25 09:36:58 S 00 27 57.274 -55 02 52.19 L C51
2021-08-27 11:47:04 C 06 55 35.34 +21 15 19.9 U I41
2021-08-27 11:50:38 C 06 55 35.91 +21 15 23.0 U I41
2021-08-27 11:54:10 C 06 55 36.49 +21 15 26.1 U I41
2021-08-27 11:57:44 C 06 55 37.07 +21 15 29.3 U I41
2021-08-28 11:49:43 C 06 59 31.91 +21 35 55.9 U I41
2021-08-28 11:53:18 C 06 59 32.50 +21 35 59.1 U I41
2021-08-28 11:56:51 C 06 59 33.09 +21 36 02.2 U I41
2021-08-28 12:00:25 C 06 59 33.67 +21 36 05.1 U I41
2021-08-28 12:03:59 C 06 59 34.24 +21 36 08.0 U I41
2021-09-02 11:53:31 C 07 19 30.16 +23 05 56.4 U I41
2021-09-02 11:57:08 C 07 19 30.76 +23 05 59.0 U I41
2021-09-02 12:00:45 C 07 19 31.36 +23 06 01.5 U I41
2021-09-02 12:04:22 C 07 19 31.97 +23 06 03.8 U I41
2021-09-02 12:08:01 C 07 19 32.58 +23 06 06.2 U I41
2021-09-03 11:53:59 C 07 23 32.49 +23 21 23.9 U I41
2021-09-03 11:57:39 C 07 23 33.09 +23 21 26.4 U I41
2021-09-03 12:01:17 C 07 23 33.71 +23 21 28.6 U I41
2021-09-03 12:04:57 C 07 23 34.32 +23 21 30.9 U I41
2021-09-03 12:08:35 C 07 23 34.93 +23 21 33.3 U I41
2021-09-04 11:52:37 C 07 27 35.19 +23 36 00.2 U I41
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)