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
2021-09-04 11:56:17 C 07 27 35.80 +23 36 02.5 U I41
2021-09-04 11:59:55 C 07 27 36.41 +23 36 04.8 U I41
2021-09-04 12:03:35 C 07 27 37.02 +23 36 06.9 U I41
2021-09-04 12:07:13 C 07 27 37.64 +23 36 09.1 U I41
2021-09-05 11:55:03 C 07 31 39.11 +23 49 49.4 U I41
2021-09-05 11:58:42 C 07 31 39.71 +23 49 51.4 U I41
2021-09-05 12:02:19 C 07 31 40.33 +23 49 53.6 U I41
2021-09-05 12:05:55 C 07 31 40.95 +23 49 55.7 U I41
2021-09-05 12:09:33 C 07 31 41.55 +23 49 57.8 U I41
2021-09-05 14:44:58 C 07 32 07.940 +23 51 26.36 U F51
2021-09-05 14:51:06 C 07 32 08.932 +23 51 29.29 U F51
2021-09-05 14:57:17 C 07 32 10.003 +23 51 33.30 U F51
2021-09-05 15:03:27 C 07 32 11.034 +23 51 36.86 U F51
2021-09-10 12:07:06 C 07 52 04.10 +24 46 49.8 U I41
2021-09-10 12:10:47 C 07 52 04.72 +24 46 51.3 U I41
2021-09-10 12:14:25 C 07 52 05.33 +24 46 52.9 U I41
2021-09-11 11:57:57 C 07 56 07.55 +24 55 48.6 U I41
2021-09-11 12:01:36 C 07 56 08.18 +24 55 50.1 U I41
2021-09-11 12:05:16 C 07 56 08.78 +24 55 51.5 U I41
2021-09-11 12:08:54 C 07 56 09.41 +24 55 52.8 U I41
2021-09-12 12:03:37 C 08 00 13.45 +25 04 07.9 U I41
2021-09-12 12:07:12 C 08 00 14.06 +25 04 09.2 U I41
2021-09-12 12:10:47 C 08 00 14.66 +25 04 10.3 U I41
2021-09-12 12:14:21 C 08 00 15.27 +25 04 11.6 U I41
2021-09-12 12:17:54 C 08 00 15.87 +25 04 12.8 U I41
2021-10-03 11:26:03 C 09 23 31.65 +25 27 00.6 V 703
2021-10-03 11:40:07 C 09 23 33.93 +25 26 58.8 V 703
2021-10-03 11:47:09 C 09 23 35.11 +25 26 58.1 V 703
2021-10-09 12:01:44 C 09 45 57.24 +24 51 09.3 V 703
2021-10-09 12:07:25 C 09 45 58.17 +24 51 09.2 V 703
2021-10-09 12:13:06 C 09 45 58.97 +24 51 06.6 V 703
2021-10-09 12:18:48 C 09 45 59.74 +24 51 05.3 V 703
2021-11-03 12:01:57 C 11 09 30.13 +20 29 02.3 V 703
2021-11-03 12:07:09 C 11 09 30.70 +20 28 58.3 V 703
2021-11-03 12:12:21 C 11 09 31.43 +20 28 56.0 V 703
2021-11-03 12:17:33 C 11 09 32.04 +20 28 54.0 V 703
2021-11-07 11:53:06 C 11 21 29.09 +19 37 10.3 V 703
2021-11-07 11:59:21 C 11 21 29.73 +19 37 07.5 V 703
2021-11-07 12:11:51 C 11 21 31.27 +19 37 01.8 V 703
2021-11-16 11:55:46 C 11 47 14.85 +17 36 12.7 V 703
2021-11-16 12:16:44 C 11 47 16.98 +17 36 00.6 V 703
2021-12-31 05:19:10 C 13 34 42.10 +07 44 40.0 X C95
2021-12-31 05:31:25 C 13 34 43.15 +07 44 34.0 X C95
2021-12-31 05:44:33 C 13 34 44.24 +07 44 27.8 X C95
2021-12-31 05:56:46 C 13 34 45.30 +07 44 21.1 X C95
2022-01-08 12:56:49 C 13 51 25.53 +06 07 15.1 V G96
2022-01-08 13:04:13 C 13 51 26.11 +06 07 11.7 V G96
2022-01-08 13:11:38 C 13 51 26.69 +06 07 08.2 V G96
2022-01-08 13:19:01 C 13 51 27.28 +06 07 04.5 V G96
2022-01-28 11:34:21 C 14 27 03.68 +02 33 04.2 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)