Occultation event with (11395) Iphinous, event index number 920
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/04/21 01:08:13 UTC
J2000 position of star is 08:39:57.3 -06:25:06
Equinox of date position of star is 08:41:12.2 -06:30:33
Star is 149 degrees from the moon. Moon is 50% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=15.7
Use an exposure time of 1.10 seconds with the standard RECON-QHY system.
SNR of 7.3 per integration for unocculted signal
Expected flux drop is 55% with SNR of 4.0 for the occulted depth (per occulted point)
Apparent velocity is 13.4 km/sec on the sky relative to the star, or, 12.7 arcsec/hr.
The recommended exposure time corresponds to 14.7 km per image.
The 1-sigma error in the time of the event is 2.9 seconds.
The 1-sigma cross-track error in the shadow position is 36.1 km.
The sky-plane scale is 3812.8 km/arcsec.
Diameter estimates:
61.7 km assuming a 5% albedo, aximum of 4.6 sec for a central chord
25.2 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 61.7 km used for deployment plan.
Star training set for 11395_Iphinous, (2025/04/21 01:08UT) Object RA Dec mag sep mel Regulus 10:09:43.0 +11:50:33 1.3 28.66 151 Alphard 09:28:49.9 -08:46:10 2.0 12.01 143 PPM 191526 08:38:42.7 -05:01:25 6.2 1.61 150 PPM 191589 08:41:53.3 -06:48:06 8.2 0.34 149 PPM 191578 08:41:27.0 -06:33:41 9.5 0.08 149 11395_Iphinous 08:41:12.2 -06:30:33 15.7 149 Positions are for equinox of date
Star training set for 11395_Iphinous, (2025/04/21 01:08UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 28.66 151 Alphard 09:27:35.2 -08:39:30 2.0 12.01 143 PPM 191526 08:37:27.1 -04:56:02 6.2 1.61 150 PPM 191589 08:40:38.5 -06:42:38 8.2 0.34 149 PPM 191578 08:40:12.1 -06:28:14 9.5 0.08 149 11395_Iphinous 08:39:57.3 -06:25:06 15.7 149 Positions are for J2000