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
2022-03-14 11:16:26 C 15 07 54.41 -05 23 37.9 V 703
2022-03-14 11:24:21 C 15 07 54.30 -05 23 42.6 V 703
2022-03-14 14:28:48 C 15 07 52.757 -05 25 24.45 U F52
2022-03-14 14:43:38 C 15 07 52.547 -05 25 32.93 U F52
2022-03-14 14:58:26 C 15 07 52.340 -05 25 41.38 U F52
2022-03-14 15:13:16 C 15 07 52.134 -05 25 49.81 U F52
2022-03-17 09:02:21 C 15 07 01.62 -06 04 52.1 V 703
2022-03-17 09:09:58 C 15 07 01.45 -06 04 57.0 V 703
2022-03-17 09:17:35 C 15 07 01.30 -06 05 02.2 V 703
2022-03-17 09:23:03 C 15 07 01.15 -06 05 04.9 V G96
2022-03-17 09:25:13 C 15 07 01.07 -06 05 07.7 V 703
2022-03-17 09:30:29 C 15 07 00.97 -06 05 10.0 V G96
2022-03-17 09:37:54 C 15 07 00.84 -06 05 13.7 V G96
2022-03-17 09:45:21 C 15 07 00.63 -06 05 19.0 V G96
2022-03-24 11:03:50 C 15 01 41.09 -07 59 25.3 V 703
2022-03-24 11:11:29 C 15 01 40.69 -07 59 30.9 V 703
2022-03-24 11:19:08 C 15 01 40.27 -07 59 36.9 V 703
2022-03-24 11:26:47 C 15 01 39.87 -07 59 42.6 V 703
2022-03-25 07:28:51 C 15 00 42.305 -08 14 18.53 V W68
2022-03-25 08:13:51 C 15 00 39.761 -08 14 52.66 V W68
2022-03-25 08:19:06 C 15 00 39.468 -08 14 56.51 V W68
2022-03-25 08:56:27 C 15 00 37.349 -08 15 24.88 V W68
2022-03-27 10:28:32 C 14 57 52.58 -08 54 35.1 V 703
2022-03-27 10:36:05 C 14 57 52.07 -08 54 40.9 V 703
2022-03-27 10:43:38 C 14 57 51.57 -08 54 47.0 V 703
2022-03-27 10:51:11 C 14 57 51.06 -08 54 52.9 V 703
2022-03-28 00:59:44 C 14 56 58.86 -09 06 28.5 X K74
2022-03-28 01:01:22 C 14 56 58.74 -09 06 29.8 X K74
2022-03-28 01:04:36 C 14 56 58.51 -09 06 32.4 X K74
2022-03-28 01:07:50 C 14 56 58.31 -09 06 35.3 X K74
2022-03-28 01:11:04 C 14 56 58.07 -09 06 37.8 X K74
2022-03-28 01:14:16 C 14 56 57.85 -09 06 40.5 X K74
2022-03-29 07:20:22 C 14 54 56.314 -09 31 14.99 V W68
2022-03-29 07:28:59 C 14 54 55.656 -09 31 22.15 V W68
2022-03-29 07:36:19 C 14 54 55.085 -09 31 28.49 V W68
2022-03-29 07:51:16 C 14 54 53.938 -09 31 41.05 V W68
2022-04-02 05:00:35 C 14 47 18.87 -10 55 10.8 q 834
2022-04-02 05:34:02 C 14 47 15.58 -10 55 42.8 q 834
2022-04-03 11:04:01 C 14 44 23.593 -11 24 34.92 V 703
2022-04-03 11:11:12 C 14 44 22.816 -11 24 41.51 V 703
2022-04-03 11:18:23 C 14 44 22.045 -11 24 48.42 V 703
2022-04-03 11:25:34 C 14 44 21.253 -11 24 55.30 V 703
2022-04-03 12:05:02 C 14 44 18.326 -11 25 29.97 U F52
2022-04-03 12:20:44 C 14 44 16.618 -11 25 45.28 U F52
2022-04-03 12:36:23 C 14 44 14.914 -11 26 00.60 U F52
2022-04-03 12:52:05 C 14 44 13.202 -11 26 15.99 U F52
2022-04-04 13:31:21 C 14 41 38.828 -11 50 43.35 U F52
2022-04-04 13:36:58 C 14 41 38.180 -11 50 48.96 U F52
2022-04-04 13:42:31 C 14 41 37.552 -11 50 54.36 U F52
2022-04-04 13:48:03 C 14 41 36.903 -11 50 59.99 U F52
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)