Occultation event with (11395) Iphinous, event index number 930
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/04/27 18:15:47 UTC
J2000 position of star is 08:41:33.5 -05:59:04
Equinox of date position of star is 08:42:48.6 -06:04:34
Star is 98 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=15.8
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 8.9 per integration for unocculted signal
Expected flux drop is 63% with SNR of 5.6 for the occulted depth (per occulted point)
Apparent velocity is 14.8 km/sec on the sky relative to the star, or, 13.8 arcsec/hr.
Position angle of asteroid motion is 34.5 degrees
The recommended exposure time corresponds to 14.8 km per image.
The 1-sigma error in the time of the event is 2.8 seconds.
The 1-sigma cross-track error in the shadow position is 29.3 km.
The sky-plane scale is 3881.8 km/arcsec.
Diameter estimates:
61.7 km assuming a 5% albedo, aximum of 4.2 sec for a central chord
25.2 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 61.7 km used for deployment plan.
Star training set for 11395_Iphinous, (2025/04/27 18:16UT) Object RA Dec mag sep mel Regulus 10:09:43.1 +11:50:33 1.3 28.07 113 Alphard 09:28:49.9 -08:46:10 2.0 11.72 110 PPM 191526 08:38:42.7 -05:01:25 6.2 1.47 97 PPM 191610 08:43:05.6 -05:42:10 7.9 0.38 98 PPM 191579 08:41:29.9 -06:00:36 9.1 0.33 98 11395_Iphinous 08:42:48.6 -06:04:34 15.8 99 Positions are for equinox of date
Star training set for 11395_Iphinous, (2025/04/27 18:16UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 28.07 113 Alphard 09:27:35.2 -08:39:30 2.0 11.72 110 PPM 191526 08:37:27.1 -04:56:02 6.2 1.47 97 PPM 191610 08:41:50.3 -05:36:39 7.9 0.38 98 PPM 191579 08:40:14.7 -05:55:09 9.1 0.33 98 11395_Iphinous 08:41:33.5 -05:59:04 15.8 98 Positions are for J2000