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
2020-09-15 12:29:12 C 08 47 21.56 +26 15 34.8 U I41
2020-09-15 12:36:00 C 08 47 22.71 +26 15 33.2 U I41
2020-09-17 12:17:08 C 08 55 19.04 +26 01 19.2 U I41
2020-09-17 12:30:41 C 08 55 21.28 +26 01 15.1 U I41
2020-09-19 12:08:02 C 09 03 10.66 +25 45 26.0 U I41
2020-09-19 12:14:44 C 09 03 11.77 +25 45 23.8 U I41
2020-09-19 12:21:29 C 09 03 12.84 +25 45 21.5 U I41
2020-09-21 12:08:13 C 09 10 57.27 +25 27 57.4 U I41
2020-09-21 12:15:01 C 09 10 58.37 +25 27 54.7 U I41
2020-09-21 12:21:48 C 09 10 59.45 +25 27 52.3 U I41
2020-09-21 12:28:36 C 09 11 00.54 +25 27 49.8 U I41
2020-09-23 12:12:24 C 09 18 37.96 +25 09 00.1 U I41
2020-09-23 12:19:14 C 09 18 39.04 +25 08 57.3 U I41
2020-09-29 12:19:24 C 09 40 59.62 +24 04 19.3 U I41
2020-09-29 12:26:14 C 09 41 00.64 +24 04 16.0 U I41
2020-09-29 12:33:02 C 09 41 01.68 +24 04 12.9 U I41
2020-09-29 12:39:53 C 09 41 02.70 +24 04 09.4 U I41
2020-09-29 12:46:42 C 09 41 03.74 +24 04 06.3 U I41
2020-10-15 12:29:00 C 10 35 59.69 +20 28 03.2 U I41
2020-10-15 12:35:47 C 10 36 00.61 +20 27 59.1 U I41
2020-10-15 12:42:33 C 10 36 01.51 +20 27 54.9 U I41
2020-10-15 12:49:20 C 10 36 02.43 +20 27 50.4 U I41
2020-11-28 12:42:38 C 12 40 40.06 +08 21 04.5 V G96
2020-11-28 12:47:58 C 12 40 40.62 +08 21 00.8 V G96
2020-11-28 12:53:18 C 12 40 41.17 +08 20 56.9 V G96
2020-11-28 12:58:38 C 12 40 41.73 +08 20 53.4 V G96
2021-01-24 15:29:22 C 14 53 48.904 -06 56 46.03 U F52
2021-01-24 15:35:50 C 14 53 49.482 -06 56 50.27 U F52
2021-01-24 15:42:21 C 14 53 50.062 -06 56 54.60 U F52
2021-01-24 15:48:48 C 14 53 50.654 -06 56 58.67 U F52
2021-02-09 12:50:09 C 15 28 54.17 -11 06 35.0 V G96
2021-02-09 12:56:52 C 15 28 54.77 -11 06 39.1 V G96
2021-02-09 13:03:35 C 15 28 55.38 -11 06 44.0 V G96
2021-02-09 13:10:19 C 15 28 55.97 -11 06 48.5 V G96
2021-02-16 15:01:32 C 15 44 35.04 -13 02 36.0 V T05
2021-02-16 15:06:48 C 15 44 35.39 -13 02 40.3 V T05
2021-02-16 15:35:42 C 15 44 38.06 -13 03 01.0 V T05
2021-02-16 15:50:53 C 15 44 39.41 -13 03 11.1 V T05
2021-02-23 12:46:46 C 15 59 57.40 -15 00 56.7 V 703
2021-02-23 12:58:49 C 15 59 58.45 -15 01 02.1 V 703
2021-03-06 14:08:48 C 16 25 07.34 -18 27 14.2 V T08
2021-03-06 14:14:47 C 16 25 07.88 -18 27 19.0 V T08
2021-03-06 14:22:44 C 16 25 08.66 -18 27 25.9 V T08
2021-03-06 14:38:40 C 16 25 10.14 -18 27 39.4 V T08
2021-03-07 14:46:27 C 16 27 30.42 -18 47 48.3 V T08
2021-03-07 14:56:24 C 16 27 31.35 -18 47 56.7 V T08
2021-03-07 15:19:40 C 16 27 33.50 -18 48 15.6 V T08
2021-03-07 15:33:04 C 16 27 34.81 -18 48 27.9 V T08
2021-03-19 14:55:09 C 16 56 28.573 -23 13 18.33 U F51
2021-03-19 15:14:30 C 16 56 30.516 -23 13 38.04 U F51
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)