Occultation event with (76867) 00YM5, event index number 4250
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/09/17 02:28:59 UTC
J2000 position of star is 04:34:05.2 +34:34:23
Equinox of date position of star is 04:35:50.2 +34:37:37
Star is 170 degrees from the moon. Moon is 34% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 40% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 12.7 km/sec on the sky relative to the star, or, 13.0 arcsec/hr.
Position angle of asteroid motion is 15.4 degrees
The recommended exposure time corresponds to 11.4 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 9.6 km.
The sky-plane scale is 3513.4 km/arcsec.
Diameter estimates:
48.3 km assuming a 5% albedo, maximum of 3.8 sec for a central chord
19.7 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 42.8 km used for deployment plan.
Star training set for 76867_00YM5, (2026/09/17 02:29UT) Object RA Dec mag sep mel Aldebaran 04:37:27.4 +16:33:39 0.8 18.07 168 3Iot Aur 04:58:44.2 +33:12:21 2.7 4.96 167 55 Per 04:26:13.5 +34:11:26 5.5 2.03 171 PPM 069509 04:35:50.1 +34:51:15 8.5 0.23 170 PPM 069497 04:34:51.9 +34:35:44 9.5 0.20 170 76867_00YM5 04:35:50.2 +34:37:37 16.0 170 Positions are for equinox of date
Star training set for 76867_00YM5, (2026/09/17 02:29UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 18.07 168 3Iot Aur 04:56:59.6 +33:09:57 2.7 4.96 167 55 Per 04:24:29.2 +34:07:51 5.5 2.03 171 PPM 069509 04:34:04.8 +34:48:01 8.5 0.23 170 PPM 069497 04:33:06.9 +34:32:27 9.5 0.20 170 76867_00YM5 04:34:05.2 +34:34:23 16.0 170 Positions are for J2000