Occultation event with (16070) Charops, event index number 1245
Regions able to see the event: Europe
Geocentric closest approach at 2025/08/22 01:32:02 UTC
J2000 position of star is 04:18:39.6 +35:53:24
Equinox of date position of star is 04:20:21.0 +35:57:02
Star is 66 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 5.7 per integration for unocculted signal
Expected flux drop is 50% with SNR of 2.8 for the occulted depth (per occulted point)
Apparent velocity is 17.3 km/sec on the sky relative to the star, or, 15.6 arcsec/hr.
Position angle of asteroid motion is 63.0 degrees
The recommended exposure time corresponds to 15.6 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 22.7 km.
The sky-plane scale is 3994.5 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, aximum of 3.8 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 63.2 km used for deployment plan.
Star training set for 16070_Charops, (2025/08/22 01:32UT) Object RA Dec mag sep mel Aldebaran 04:37:23.7 +16:33:31 0.8 19.76 65 44Zet Per 03:55:45.0 +31:57:27 2.8 6.48 71 55 Per 04:26:09.3 +34:11:17 5.5 2.13 65 PPM 069347 04:22:40.8 +36:38:00 7.9 0.83 65 PPM 069302 04:20:10.7 +36:03:01 8.7 0.11 66 16070_Charops 04:20:21.0 +35:57:02 15.6 65 Positions are for equinox of date
Star training set for 16070_Charops, (2025/08/22 01:32UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 19.76 65 44Zet Per 03:54:07.9 +31:53:01 2.8 6.48 71 55 Per 04:24:29.2 +34:07:51 5.5 2.13 65 PPM 069347 04:20:58.8 +36:34:27 7.9 0.83 65 PPM 069302 04:18:29.3 +35:59:22 8.7 0.11 66 16070_Charops 04:18:39.6 +35:53:24 15.6 66 Positions are for J2000