Occultation event with (15436) Dexius, event index number 3248
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/02/15 02:55:28 UTC
J2000 position of star is 11:27:28.8 -17:19:01
Equinox of date position of star is 11:28:47.7 -17:27:40
Star is 116 degrees from the moon. Moon is 6% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=14.3
Use an exposure time of 1.65 seconds with the standard RECON-QHY system.
SNR of 4.1 per integration for unocculted signal
Expected flux drop is 14% with SNR of 0.6 for the occulted depth (per occulted point)
Apparent velocity is 12.9 km/sec on the sky relative to the star, or, 14.5 arcsec/hr.
Position angle of asteroid motion is 94.6 degrees
The recommended exposure time corresponds to 21.3 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 38.8 km.
The sky-plane scale is 3208.7 km/arcsec.
Diameter estimates:
90.4 km assuming a 5% albedo, maximum of 7.0 sec for a central chord
36.9 km assuming a 30% albedo, maximum of 2.9 sec for a central chord
Cross-track diameter of 87.6 km used for deployment plan.
Star training set for 15436_Dexius, (2026/02/15 02:55UT) Object RA Dec mag sep mel Spica 13:26:34.4 -11:17:49 1.0 29.15 94 4Gam Crv 12:17:09.2 -17:41:13 2.6 11.53 106 15Gam Crt 11:26:11.4 -17:49:40 4.1 0.72 116 PPM 224472 11:30:32.8 -17:29:44 8.3 0.42 115 PPM 224421 11:28:30.8 -17:38:01 9.8 0.19 116 15436_Dexius 11:28:47.7 -17:27:40 14.3 115 Positions are for equinox of date
Star training set for 15436_Dexius, (2026/02/15 02:55UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 29.15 94 4Gam Crv 12:15:48.1 -17:32:30 2.6 11.53 106 15Gam Crt 11:24:52.8 -17:41:02 4.1 0.72 116 PPM 224472 11:29:13.9 -17:21:05 8.3 0.42 115 PPM 224421 11:27:12.0 -17:29:23 9.8 0.19 116 15436_Dexius 11:27:28.8 -17:19:01 14.3 116 Positions are for J2000