Occultation event with (4543) Phoinix, event index number 3602
Regions able to see the event: SAmericaN,SAfrica
Geocentric closest approach at 2026/04/09 01:26:41 UTC
J2000 position of star is 13:10:19.3 -24:05:48
Equinox of date position of star is 13:11:44.9 -24:14:09
Star is 71 degrees from the moon. Moon is 61% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=14.9
Use an exposure time of 1.35 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 18% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 19.0 arcsec/hr.
Position angle of asteroid motion is 105.0 degrees
The recommended exposure time corresponds to 23.9 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 23.4 km.
The sky-plane scale is 3351.0 km/arcsec.
Diameter estimates:
67.3 km assuming a 5% albedo, maximum of 3.8 sec for a central chord
27.5 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 63.8 km used for deployment plan.
Star training set for 4543_Phoinix, (2026/04/09 01:27UT) Object RA Dec mag sep mel Spica 13:26:34.9 -11:17:51 1.0 13.41 73 9Bet Crv 12:35:46.4 -23:32:30 2.6 8.25 78 45Psi Hya 13:10:28.5 -23:15:28 4.9 1.02 71 PPM 261298 13:12:11.7 -24:19:07 8.0 0.13 70 PPM 261293 13:12:00.4 -24:08:56 9.2 0.10 71 4543_Phoinix 13:11:44.9 -24:14:09 14.9 70 Positions are for equinox of date
Star training set for 4543_Phoinix, (2026/04/09 01:27UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 13.41 73 9Bet Crv 12:34:23.2 -23:23:50 2.6 8.25 78 45Psi Hya 13:09:03.2 -23:07:06 4.9 1.02 71 PPM 261298 13:10:46.0 -24:10:46 8.0 0.13 70 PPM 261293 13:10:34.8 -24:00:35 9.2 0.10 71 4543_Phoinix 13:10:19.3 -24:05:48 14.9 71 Positions are for J2000