Occultation event with (4543) Phoinix, event index number 3446
Regions able to see the event: Australia,NZ
Geocentric closest approach at 2026/03/16 15:24:07 UTC
J2000 position of star is 13:22:05.7 -24:29:33
Equinox of date position of star is 13:23:31.9 -24:37:45
Star is 116 degrees from the moon. Moon is 7% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.2
Use an exposure time of 1.10 seconds with the standard RECON-QHY system.
SNR of 3.4 per integration for unocculted signal
Expected flux drop is 25% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 14.2 km/sec on the sky relative to the star, or, 14.9 arcsec/hr.
Position angle of asteroid motion is 89.8 degrees
The recommended exposure time corresponds to 15.7 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 28.8 km.
The sky-plane scale is 3436.3 km/arcsec.
Diameter estimates:
67.3 km assuming a 5% albedo, maximum of 4.7 sec for a central chord
27.5 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 63.8 km used for deployment plan.
Star training set for 4543_Phoinix, (2026/03/16 15:24UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 13.35 122 9Bet Crv 12:35:46.2 -23:32:29 2.6 10.95 126 46Gam Hya 13:20:21.1 -23:18:33 3.0 1.51 117 PPM 261519 13:21:44.6 -24:38:49 8.5 0.41 116 PPM 261540 13:22:38.2 -24:53:47 9.7 0.34 116 4543_Phoinix 13:23:31.9 -24:37:45 15.2 116 Positions are for equinox of date
Star training set for 4543_Phoinix, (2026/03/16 15:24UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 13.35 122 9Bet Crv 12:34:23.2 -23:23:50 2.6 10.95 126 46Gam Hya 13:18:55.4 -23:10:19 3.0 1.51 117 PPM 261519 13:20:18.5 -24:30:37 8.5 0.41 116 PPM 261540 13:21:11.9 -24:45:35 9.7 0.34 116 4543_Phoinix 13:22:05.7 -24:29:33 15.2 116 Positions are for J2000