Occultation event with (16070) Charops, event index number 1225
Regions able to see the event: Europe
Geocentric closest approach at 2025/08/13 00:17:56 UTC
J2000 position of star is 04:14:04.0 +35:27:13
Equinox of date position of star is 04:15:44.6 +35:31:00
Star is 60 degrees from the moon. Moon is 84% illuminated.
Stellar brightness G=12.9, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 11.6 per integration for unocculted signal
Expected flux drop is 93% with SNR of 10.8 for the occulted depth (per occulted point)
Apparent velocity is 21.0 km/sec on the sky relative to the star, or, 18.5 arcsec/hr.
Position angle of asteroid motion is 66.5 degrees
The recommended exposure time corresponds to 2.5 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 22.5 km.
The sky-plane scale is 4085.8 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, aximum of 3.2 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 63.2 km used for deployment plan.
Star training set for 16070_Charops, (2025/08/13 00:18UT) Object RA Dec mag sep mel Aldebaran 04:37:23.6 +16:33:31 0.8 19.56 62 44Zet Per 03:55:44.9 +31:57:27 2.8 5.47 55 PPM 069097 04:08:34.6 +33:30:48 6.4 2.49 58 PPM 069221 04:15:03.9 +35:32:24 7.9 0.14 60 16070_Charops 04:15:44.6 +35:31:00 15.7 61 Positions are for equinox of date
Star training set for 16070_Charops, (2025/08/13 00:18UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 19.56 62 44Zet Per 03:54:07.9 +31:53:01 2.8 5.47 55 PPM 069097 04:06:55.8 +33:26:46 6.4 2.49 58 PPM 069221 04:13:23.3 +35:28:35 7.9 0.14 60 16070_Charops 04:14:04.0 +35:27:13 15.7 60 Positions are for J2000