RECON observing guide for 13385_98XO79_20250615232910

Occultation event with (13385) 98XO79, event index number 1064
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/06/15 23:29:10 UTC

J2000 position of star is 09:30:25.8 +12:57:19
Equinox of date position of star is 09:31:48.8 +12:50:33
Star is 175 degrees from the moon. Moon is 79% illuminated.
Stellar brightness G=12.7, apparent brightess of occulting body is G=16.9
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 13.8 per integration for unocculted signal
Expected flux drop is 98% with SNR of 13.5 for the occulted depth (per occulted point)

Apparent velocity is 28.4 km/sec on the sky relative to the star, or, 23.6 arcsec/hr.
The recommended exposure time corresponds to 3.4 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 17.0 km.
The sky-plane scale is 4331.1 km/arcsec.

Diameter estimates:
38.7 km assuming a 5% albedo, aximum of 1.4 sec for a central chord
15.8 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 38.7 km used for deployment plan.

Star training set for 13385_98XO79, (2025/06/15 23:29UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.5 +11:50:31  1.3  9.31 170
5Xi Leo        09:33:18.9 +11:11:09  5.0  1.70 174
PPM 126520     09:31:46.6 +12:49:34  8.0  0.02 175
13385_98XO79   09:31:48.8 +12:50:33 16.9       175
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Star training set for 13385_98XO79, (2025/06/15 23:29UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  9.31 170
5Xi Leo        09:31:56.6 +11:17:57  5.0  1.70 174
PPM 126520     09:30:23.6 +12:56:20  8.0  0.02 175
13385_98XO79   09:30:25.8 +12:57:19 16.9       175
Positions are for J2000


Created by recondetail.pro, 2025/03/15 09:42:09 MT