Occultation event with (30705) Idaios, event index number 4628
Regions able to see the event: SMexico
Geocentric closest approach at 2026/11/10 03:48:16 UTC
J2000 position of star is 03:30:57.8 +32:52:24
Equinox of date position of star is 03:32:38.9 +32:57:48
Star is 172 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=13.0, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 10.9 per integration for unocculted signal
Expected flux drop is 87% with SNR of 9.5 for the occulted depth (per occulted point)
Apparent velocity is 17.3 km/sec on the sky relative to the star, or, 21.4 arcsec/hr.
Position angle of asteroid motion is 92.5 degrees
The recommended exposure time corresponds to 2.1 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 27.4 km.
The sky-plane scale is 2914.3 km/arcsec.
Diameter estimates:
48.8 km assuming a 5% albedo, maximum of 2.8 sec for a central chord
19.9 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 44.5 km used for deployment plan.
Star training set for 30705_Idaios, (2026/11/10 03:48UT) Object RA Dec mag sep mel Aldebaran 04:37:27.9 +16:33:40 0.8 21.97 164 44Zet Per 03:55:49.6 +31:57:40 2.8 4.99 172 PPM 068486 03:30:02.4 +33:53:55 5.6 1.08 171 PPM 068593 03:36:42.1 +32:06:16 7.2 1.21 172 PPM 068522 03:32:09.3 +33:08:24 9.7 0.20 171 30705_Idaios 03:32:38.9 +32:57:48 15.1 171 Positions are for equinox of date
Star training set for 30705_Idaios, (2026/11/10 03:48UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 21.97 164 44Zet Per 03:54:07.9 +31:53:01 2.8 4.99 172 PPM 068486 03:28:20.8 +33:48:26 5.6 1.08 171 PPM 068593 03:35:01.3 +32:00:59 7.2 1.21 172 PPM 068522 03:30:28.0 +33:02:59 9.7 0.20 171 30705_Idaios 03:30:57.8 +32:52:24 15.1 172 Positions are for J2000