Occultation event with (16070) Charops, event index number 1215
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2025/08/08 09:26:57 UTC
J2000 position of star is 04:11:23.6 +35:13:28
Equinox of date position of star is 04:13:03.9 +35:17:20
Star is 123 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=16.7, apparent brightess of occulting body is G=15.7
Use an exposure time of 1.35 seconds with the standard RECON-QHY system.
SNR of 3.1 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 22.8 km/sec on the sky relative to the star, or, 19.9 arcsec/hr.
Position angle of asteroid motion is 67.8 degrees
The recommended exposure time corresponds to 30.8 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 22.5 km.
The sky-plane scale is 4130.9 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, aximum of 2.9 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 63.2 km used for deployment plan.
Star training set for 16070_Charops, (2025/08/08 09:27UT) Object RA Dec mag sep mel Aldebaran 04:37:23.6 +16:33:31 0.8 19.50 125 44Zet Per 03:55:44.9 +31:57:27 2.8 4.91 119 PPM 069097 04:08:34.5 +33:30:48 6.4 2.00 122 PPM 069200 04:13:44.3 +35:25:25 7.8 0.19 123 PPM 069186 04:12:45.1 +35:17:25 9.6 0.06 123 16070_Charops 04:13:03.9 +35:17:20 15.7 123 Positions are for equinox of date
Star training set for 16070_Charops, (2025/08/08 09:27UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 19.50 125 44Zet Per 03:54:07.9 +31:53:01 2.8 4.91 119 PPM 069097 04:06:55.8 +33:26:46 6.4 2.00 122 PPM 069200 04:12:03.8 +35:21:34 7.8 0.19 123 PPM 069186 04:11:04.8 +35:13:32 9.6 0.06 123 16070_Charops 04:11:23.6 +35:13:28 15.7 123 Positions are for J2000