Occultation event with (7152) Euneus, event index number 1069
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/06/17 21:35:13 UTC
J2000 position of star is 10:02:18.1 +14:35:13
Equinox of date position of star is 10:03:40.7 +14:27:48
Star is 162 degrees from the moon. Moon is 60% illuminated.
Stellar brightness G=14.9, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 6.7 per integration for unocculted signal
Expected flux drop is 75% with SNR of 5.0 for the occulted depth (per occulted point)
Apparent velocity is 27.1 km/sec on the sky relative to the star, or, 24.1 arcsec/hr.
Position angle of asteroid motion is 337.4 degrees
The recommended exposure time corresponds to 12.2 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 21.1 km.
The sky-plane scale is 4052.7 km/arcsec.
Diameter estimates:
51.5 km assuming a 5% albedo, aximum of 1.9 sec for a central chord
21.0 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 51.5 km used for deployment plan.
Star training set for 7152_Euneus, (2025/06/17 21:35UT) Object RA Dec mag sep mel Regulus 10:09:43.5 +11:50:30 1.3 3.01 164 PPM 127101 10:07:03.6 +15:37:57 6.2 1.43 162 PPM 127059 10:03:58.2 +14:12:55 7.9 0.26 162 PPM 127062 10:04:06.1 +14:41:19 8.9 0.25 162 7152_Euneus 10:03:40.7 +14:27:48 16.1 162 Positions are for equinox of date
Star training set for 7152_Euneus, (2025/06/17 21:35UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 3.01 164 PPM 127101 10:05:40.8 +15:45:26 6.2 1.43 162 PPM 127059 10:02:35.7 +14:20:21 7.9 0.26 162 PPM 127062 10:02:43.4 +14:48:45 8.9 0.25 162 7152_Euneus 10:02:18.1 +14:35:13 16.1 162 Positions are for J2000