Occultation event with (30705) Idaios, event index number 4964
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/30 22:45:14 UTC
J2000 position of star is 03:16:54.4 +32:43:47
Equinox of date position of star is 03:18:34.7 +32:49:38
Star is 99 degrees from the moon. Moon is 54% illuminated.
Stellar brightness G=15.4, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 5.7 per integration for unocculted signal
Expected flux drop is 45% with SNR of 2.6 for the occulted depth (per occulted point)
Apparent velocity is 16.5 km/sec on the sky relative to the star, or, 20.3 arcsec/hr.
Position angle of asteroid motion is 82.2 degrees
The recommended exposure time corresponds to 10.7 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 23.8 km.
The sky-plane scale is 2927.7 km/arcsec.
Diameter estimates:
48.8 km assuming a 5% albedo, maximum of 3.0 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, (2026/11/30 22:45UT) Object RA Dec mag sep mel Aldebaran 04:37:28.1 +16:33:40 0.8 24.12 85 44Zet Per 03:55:49.9 +31:57:41 2.8 7.91 92 PPM 068330 03:20:25.4 +34:19:09 5.9 1.54 99 PPM 068267 03:17:27.5 +32:57:17 6.6 0.27 99 PPM 068288 03:18:15.8 +32:44:06 10.9 0.11 99 30705_Idaios 03:18:34.7 +32:49:38 15.1 99 Positions are for equinox of date
Star training set for 30705_Idaios, (2026/11/30 22:45UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 24.12 85 44Zet Per 03:54:07.9 +31:53:01 2.8 7.91 92 PPM 068330 03:18:43.9 +34:13:22 5.9 1.54 99 PPM 068267 03:15:47.1 +32:51:25 6.6 0.27 99 PPM 068288 03:16:35.6 +32:38:14 10.9 0.11 99 30705_Idaios 03:16:54.4 +32:43:47 15.1 99 Positions are for J2000