Occultation event with (16070) Charops, event index number 5189
Regions able to see the event: Europe
Geocentric closest approach at 2026/12/12 21:40:43 UTC
J2000 position of star is 06:21:16.9 +32:53:21
Equinox of date position of star is 06:23:03.0 +32:52:29
Star is 151 degrees from the moon. Moon is 13% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 6.7 per integration for unocculted signal
Expected flux drop is 44% with SNR of 2.9 for the occulted depth (per occulted point)
Apparent velocity is 18.2 km/sec on the sky relative to the star, or, 18.9 arcsec/hr.
Position angle of asteroid motion is 86.5 degrees
The recommended exposure time corresponds to 15.5 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 25.7 km.
The sky-plane scale is 3464.9 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, maximum of 3.7 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 63.2 km used for deployment plan.
Star training set for 16070_Charops, (2026/12/12 21:41UT) Object RA Dec mag sep mel Pollux 07:46:57.7 +27:57:32 1.1 18.71 169 Alnath 05:27:59.9 +28:37:39 1.6 12.55 140 PPM 071342 06:14:06.0 +32:41:05 5.8 1.89 149 PPM 071468 06:19:37.2 +32:29:33 7.9 0.82 150 PPM 071529 06:23:19.4 +32:42:34 9.1 0.18 151 16070_Charops 06:23:03.0 +32:52:29 15.1 151 Positions are for equinox of date
Star training set for 16070_Charops, (2026/12/12 21:41UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 18.71 169 Alnath 05:26:17.6 +28:36:22 1.6 12.55 140 PPM 071342 06:12:20.1 +32:41:36 5.8 1.89 149 PPM 071468 06:17:51.5 +32:30:17 7.9 0.82 150 PPM 071529 06:21:33.5 +32:43:26 9.1 0.18 151 16070_Charops 06:21:16.9 +32:53:21 15.1 151 Positions are for J2000