Occultation event with (11395) Iphinous, event index number 949
Regions able to see the event: Australia
Geocentric closest approach at 2025/05/06 13:27:30 UTC
J2000 position of star is 08:44:22.6 -05:29:14
Equinox of date position of star is 08:45:38.0 -05:34:49
Star is 34 degrees from the moon. Moon is 70% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 39% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 17.3 km/sec on the sky relative to the star, or, 15.6 arcsec/hr.
Position angle of asteroid motion is 21.4 degrees
The recommended exposure time corresponds to 14.7 km per image.
The 1-sigma error in the time of the event is 2.7 seconds.
The 1-sigma cross-track error in the shadow position is 20.8 km.
The sky-plane scale is 3974.1 km/arcsec.
Diameter estimates:
61.7 km assuming a 5% albedo, aximum of 3.6 sec for a central chord
25.2 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 61.7 km used for deployment plan.
Star training set for 11395_Iphinous, (2025/05/06 13:27UT) Object RA Dec mag sep mel Regulus 10:09:43.1 +11:50:32 1.3 27.22 9 Alphard 09:28:50.0 -08:46:11 2.0 11.18 27 PPM 191714 08:49:19.9 -06:39:14 6.4 1.41 33 PPM 191648 08:45:02.4 -06:07:16 8.3 0.56 34 PPM 191659 08:45:47.7 -05:23:48 9.0 0.19 34 11395_Iphinous 08:45:38.0 -05:34:49 15.8 33 Positions are for equinox of date
Star training set for 11395_Iphinous, (2025/05/06 13:27UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 27.22 9 Alphard 09:27:35.2 -08:39:30 2.0 11.18 27 PPM 191714 08:48:04.9 -06:33:33 6.4 1.41 33 PPM 191648 08:43:47.2 -06:01:42 8.3 0.56 34 PPM 191659 08:44:32.1 -05:18:13 9.0 0.19 34 11395_Iphinous 08:44:22.6 -05:29:14 15.8 34 Positions are for J2000