Occultation event with (15436) Dexius, event index number 3233
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/02/10 09:26:14 UTC
J2000 position of star is 11:29:17.7 -17:19:54
Equinox of date position of star is 11:30:36.6 -17:28:32
Star is 61 degrees from the moon. Moon is 42% illuminated.
Stellar brightness G=12.6, apparent brightess of occulting body is G=14.3
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 13.9 per integration for unocculted signal
Expected flux drop is 83% with SNR of 11.5 for the occulted depth (per occulted point)
Apparent velocity is 11.7 km/sec on the sky relative to the star, or, 13.0 arcsec/hr.
Position angle of asteroid motion is 89.0 degrees
The recommended exposure time corresponds to 1.4 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 39.9 km.
The sky-plane scale is 3238.7 km/arcsec.
Diameter estimates:
90.4 km assuming a 5% albedo, maximum of 7.7 sec for a central chord
36.9 km assuming a 30% albedo, maximum of 3.2 sec for a central chord
Cross-track diameter of 87.6 km used for deployment plan.
Star training set for 15436_Dexius, (2026/02/10 09:26UT) Object RA Dec mag sep mel Spica 13:26:34.3 -11:17:48 1.0 28.72 37 4Gam Crv 12:17:09.2 -17:41:12 2.6 11.09 50 15Gam Crt 11:26:11.4 -17:49:40 4.1 1.11 62 PPM 224472 11:30:32.7 -17:29:43 8.3 0.02 61 15436_Dexius 11:30:36.6 -17:28:32 14.3 60 Positions are for equinox of date
Star training set for 15436_Dexius, (2026/02/10 09:26UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 28.72 37 4Gam Crv 12:15:48.1 -17:32:30 2.6 11.09 50 15Gam Crt 11:24:52.8 -17:41:02 4.1 1.11 62 PPM 224472 11:29:13.9 -17:21:05 8.3 0.02 61 15436_Dexius 11:29:17.7 -17:19:54 14.3 61 Positions are for J2000