Occultation event with (2797) Teucer, event index number 3642
Regions able to see the event: SMexico
Geocentric closest approach at 2026/04/16 01:40:57 UTC
J2000 position of star is 13:27:28.1 +15:21:45
Equinox of date position of star is 13:28:45.4 +15:13:37
Star is 154 degrees from the moon. Moon is 3% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=13.5
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 8% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 20.6 arcsec/hr.
Position angle of asteroid motion is 96.0 degrees
The recommended exposure time corresponds to 21.7 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 29.0 km.
The sky-plane scale is 2927.7 km/arcsec.
Diameter estimates:
105.2 km assuming a 5% albedo, maximum of 6.3 sec for a central chord
43.0 km assuming a 30% albedo, maximum of 2.6 sec for a central chord
Cross-track diameter of 89.4 km used for deployment plan.
Star training set for 2797_Teucer, (2026/04/16 01:41UT) Object RA Dec mag sep mel Arcturus 14:16:51.7 +19:02:49 0.0 12.11 143 Vindemiatrix 13:03:29.1 +10:49:06 2.8 7.57 161 70 Vir 13:29:43.0 +13:38:21 5.0 1.60 155 PPM 129844 13:29:43.6 +15:34:23 7.6 0.42 153 PPM 129826 13:28:15.9 +14:56:47 9.1 0.30 154 2797_Teucer 13:28:45.4 +15:13:37 13.5 154 Positions are for equinox of date
Star training set for 2797_Teucer, (2026/04/16 01:41UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 12.11 143 Vindemiatrix 13:02:10.1 +10:57:33 2.8 7.57 161 70 Vir 13:28:25.4 +13:46:29 5.0 1.60 155 PPM 129844 13:28:26.5 +15:42:30 7.6 0.42 153 PPM 129826 13:26:58.6 +15:04:55 9.1 0.30 154 2797_Teucer 13:27:28.1 +15:21:45 13.5 154 Positions are for J2000