Occultation event with (22180) 00YZ, event index number 1140
Regions able to see the event: Australia
Geocentric closest approach at 2025/07/14 19:44:07 UTC
J2000 position of star is 01:47:28.2 +32:59:37
Equinox of date position of star is 01:48:56.9 +33:07:12
Star is 59 degrees from the moon. Moon is 83% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 38% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 20.2 km/sec on the sky relative to the star, or, 20.3 arcsec/hr.
The recommended exposure time corresponds to 15.2 km per image.
The 1-sigma error in the time of the event is 2.0 seconds.
The 1-sigma cross-track error in the shadow position is 21.5 km.
The sky-plane scale is 3589.0 km/arcsec.
Diameter estimates:
53.5 km assuming a 5% albedo, aximum of 2.6 sec for a central chord
21.8 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 53.5 km used for deployment plan.
Star training set for 22180_00YZ, (2025/07/14 19:44UT) Object RA Dec mag sep mel Aldebaran 04:37:23.3 +16:33:31 0.8 41.30 88 57Gam1And 02:05:28.7 +42:27:04 2.3 9.88 67 PPM 066632 01:50:09.8 +32:49:07 6.2 0.39 59 PPM 066607 01:48:11.0 +33:00:45 9.6 0.19 58 PPM 066618 01:49:14.8 +33:14:07 10.5 0.13 59 22180_00YZ 01:48:56.9 +33:07:12 15.7 59 Positions are for equinox of date
Star training set for 22180_00YZ, (2025/07/14 19:44UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 41.30 88 57Gam1And 02:03:54.1 +42:19:46 2.3 9.88 67 PPM 066632 01:48:41.2 +32:41:33 6.2 0.39 59 PPM 066607 01:46:42.5 +32:53:08 9.6 0.19 58 PPM 066618 01:47:46.1 +33:06:32 10.5 0.13 59 22180_00YZ 01:47:28.2 +32:59:37 15.7 59 Positions are for J2000