Occultation event with (5264) Telephus, event index number 5139
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/09 08:17:18 UTC
J2000 position of star is 14:45:56.0 +15:11:46
Equinox of date position of star is 14:47:12.4 +15:05:03
Star is 56 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 29% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 36.4 km/sec on the sky relative to the star, or, 32.0 arcsec/hr.
Position angle of asteroid motion is 93.6 degrees
The recommended exposure time corresponds to 25.5 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 36.2 km.
The sky-plane scale is 4096.9 km/arcsec.
Diameter estimates:
77.3 km assuming a 5% albedo, maximum of 2.1 sec for a central chord
31.5 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 68.5 km used for deployment plan.
Star training set for 5264_Telephus, (2026/12/09 08:17UT) Object RA Dec mag sep mel Arcturus 14:16:53.6 +19:02:39 0.0 8.25 64 Alphekka 15:35:49.8 +26:37:32 2.2 16.17 60 PPM 130850 14:47:22.2 +15:01:12 5.6 0.08 56 PPM 130856 14:47:46.1 +14:44:37 8.4 0.37 56 PPM 130850 14:47:22.2 +15:01:12 5.6 0.08 56 5264_Telephus 14:47:12.4 +15:05:03 15.2 56 Positions are for equinox of date
Star training set for 5264_Telephus, (2026/12/09 08:17UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 8.25 64 Alphekka 15:34:41.5 +26:42:51 2.2 16.17 60 PPM 130850 14:46:05.8 +15:07:55 5.6 0.08 56 PPM 130856 14:46:29.6 +14:51:19 8.4 0.37 56 PPM 130850 14:46:05.8 +15:07:55 5.6 0.08 56 5264_Telephus 14:45:56.0 +15:11:46 15.2 56 Positions are for J2000