Occultation event with (11396) 98XZ77, event index number 3819
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/07/01 01:31:43 UTC
J2000 position of star is 11:26:20.3 +00:30:39
Equinox of date position of star is 11:27:41.8 +00:21:53
Star is 119 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=14.9, apparent brightess of occulting body is G=16.6
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 6.3 per integration for unocculted signal
Expected flux drop is 83% with SNR of 5.2 for the occulted depth (per occulted point)
Apparent velocity is 20.7 km/sec on the sky relative to the star, or, 17.8 arcsec/hr.
Position angle of asteroid motion is 102.3 degrees
The recommended exposure time corresponds to 8.3 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 37.2 km.
The sky-plane scale is 4170.7 km/arcsec.
Diameter estimates:
44.9 km assuming a 5% albedo, maximum of 2.2 sec for a central chord
18.3 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 37.1 km used for deployment plan.
Star training set for 11396_98XZ77, (2026/07/01 01:32UT) Object RA Dec mag sep mel Regulus 10:09:46.8 +11:50:12 1.3 22.48 141 Denebola 11:50:24.6 +14:25:26 2.1 15.14 119 79 Leo 11:25:23.9 +01:15:43 6.4 1.07 120 PPM 157877 11:28:55.6 +00:48:33 7.7 0.54 119 PPM 157827 11:26:24.6 -00:01:49 9.7 0.51 119 PPM 157822 11:26:10.3 +00:13:59 10.3 0.40 119 11396_98XZ77 11:27:41.8 +00:21:53 16.6 118 Positions are for equinox of date
Star training set for 11396_98XZ77, (2026/07/01 01:32UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 22.48 141 Denebola 11:49:02.7 +14:34:16 2.1 15.14 119 79 Leo 11:24:02.3 +01:24:28 6.4 1.07 120 PPM 157877 11:27:34.0 +00:57:19 7.7 0.54 119 PPM 157827 11:25:03.1 +00:06:56 9.7 0.51 119 PPM 157822 11:24:48.8 +00:22:44 10.3 0.40 119 11396_98XZ77 11:26:20.3 +00:30:39 16.6 119 Positions are for J2000