Occultation event with (4707) Khryses, event index number 4767
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/19 08:10:46 UTC
J2000 position of star is 06:37:28.0 +28:33:04
Equinox of date position of star is 06:39:10.0 +28:31:34
Star is 110 degrees from the moon. Moon is 68% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 63% with SNR of 6.0 for the occulted depth (per occulted point)
Apparent velocity is 9.5 km/sec on the sky relative to the star, or, 11.4 arcsec/hr.
Position angle of asteroid motion is 95.9 degrees
The recommended exposure time corresponds to 9.1 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 33.9 km.
The sky-plane scale is 3020.5 km/arcsec.
Diameter estimates:
43.8 km assuming a 5% albedo, maximum of 4.6 sec for a central chord
17.9 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 37.8 km used for deployment plan.
Star training set for 4707_Khryses, (2026/11/19 08:11UT) Object RA Dec mag sep mel Pollux 07:46:57.5 +27:57:32 1.1 14.93 124 Alhena 06:39:15.9 +16:22:26 1.9 12.15 111 53 Aur 06:40:05.3 +28:57:31 5.5 0.48 110 PPM 096301 06:40:34.9 +27:46:42 7.7 0.81 110 PPM 096232 06:37:44.7 +28:42:27 9.9 0.36 109 PPM 096273 06:39:23.6 +28:24:14 10.4 0.13 110 4707_Khryses 06:39:10.0 +28:31:34 15.6 110 Positions are for equinox of date
Star training set for 4707_Khryses, (2026/11/19 08:11UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 14.93 124 Alhena 06:37:42.8 +16:23:56 1.9 12.15 111 53 Aur 06:38:23.0 +28:59:03 5.5 0.48 110 PPM 096301 06:38:53.6 +27:48:15 7.7 0.81 110 PPM 096232 06:36:02.6 +28:43:54 9.9 0.36 109 PPM 096273 06:37:41.8 +28:25:44 10.4 0.13 110 4707_Khryses 06:37:28.0 +28:33:04 15.6 110 Positions are for J2000