Occultation event with (7152) Euneus, event index number 1026
Regions able to see the event: Europe
Geocentric closest approach at 2025/06/01 21:53:41 UTC
J2000 position of star is 09:53:19.3 +15:25:21
Equinox of date position of star is 09:54:42.4 +15:18:06
Star is 2 degrees from the moon. Moon is 38% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 78% with SNR of 7.5 for the occulted depth (per occulted point)
Apparent velocity is 20.9 km/sec on the sky relative to the star, or, 19.4 arcsec/hr.
Position angle of asteroid motion is 346.9 degrees
The recommended exposure time corresponds to 11.5 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 15.0 km.
The sky-plane scale is 3881.8 km/arcsec.
Diameter estimates:
51.5 km assuming a 5% albedo, aximum of 2.5 sec for a central chord
21.0 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 51.5 km used for deployment plan.
Star training set for 7152_Euneus, (2025/06/01 21:54UT) Object RA Dec mag sep mel Regulus 10:09:43.4 +11:50:31 1.3 5.03 3 16Psi Leo 09:45:06.8 +13:54:15 5.3 2.71 4 PPM 126818 09:50:18.7 +15:26:47 8.5 1.07 3 PPM 126904 09:55:17.7 +15:20:15 9.6 0.15 2 7152_Euneus 09:54:42.4 +15:18:06 16.0 2 Positions are for equinox of date
Star training set for 7152_Euneus, (2025/06/01 21:54UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 5.03 3 16Psi Leo 09:43:43.9 +14:01:18 5.3 2.71 4 PPM 126818 09:48:55.5 +15:33:56 8.5 1.07 3 PPM 126904 09:53:54.7 +15:27:30 9.6 0.15 2 7152_Euneus 09:53:19.3 +15:25:21 16.0 2 Positions are for J2000