Occultation event with (22014) 99XQ96, event index number 951
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/05/07 01:35:07 UTC
J2000 position of star is 08:36:36.3 -10:50:24
Equinox of date position of star is 08:37:49.2 -10:55:46
Star is 41 degrees from the moon. Moon is 74% illuminated.
Stellar brightness G=16.8, apparent brightess of occulting body is G=15.5
Use an exposure time of 1.50 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 24% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 17.0 km/sec on the sky relative to the star, or, 18.1 arcsec/hr.
Position angle of asteroid motion is 15.5 degrees
The recommended exposure time corresponds to 25.5 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 21.6 km.
The sky-plane scale is 3385.8 km/arcsec.
Diameter estimates:
54.0 km assuming a 5% albedo, aximum of 3.2 sec for a central chord
22.0 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 54.0 km used for deployment plan.
Star training set for 22014_99XQ96, (2025/05/07 01:35UT) Object RA Dec mag sep mel Sirius 06:46:15.9 -16:45:09 -1.5 27.67 69 Alphard 09:28:50.0 -08:46:11 2.0 12.75 29 6 Hya 08:41:13.5 -12:33:59 5.0 1.84 41 PPM 220355 08:37:45.6 -10:39:20 8.4 0.27 41 PPM 220331 08:36:48.5 -10:52:40 9.0 0.25 42 22014_99XQ96 08:37:49.2 -10:55:46 15.5 41 Positions are for equinox of date
Star training set for 22014_99XQ96, (2025/05/07 01:35UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:28 -1.5 27.67 69 Alphard 09:27:35.2 -08:39:30 2.0 12.75 29 6 Hya 08:40:01.3 -12:28:32 5.0 1.84 41 PPM 220355 08:36:32.6 -10:33:59 8.4 0.27 41 PPM 220331 08:35:35.6 -10:47:20 9.0 0.25 42 22014_99XQ96 08:36:36.3 -10:50:24 15.5 41 Positions are for J2000