RECON observing guide for 12242_Koon_20250706080222

Occultation event with (12242) Koon, event index number 1112
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/07/06 08:02:22 UTC

J2000 position of star is 03:42:03.6 +16:31:39
Equinox of date position of star is 03:43:30.5 +16:36:27
Star is 171 degrees from the moon. Moon is 81% illuminated.
Stellar brightness G=13.9, apparent brightess of occulting body is G=16.6
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 93% with SNR of 9.2 for the occulted depth (per occulted point)

Apparent velocity is 32.1 km/sec on the sky relative to the star, or, 27.8 arcsec/hr.
The recommended exposure time corresponds to 8.0 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 16.1 km.
The sky-plane scale is 4160.7 km/arcsec.

Diameter estimates:
39.8 km assuming a 5% albedo, aximum of 1.2 sec for a central chord
16.2 km assuming a 30% albedo, maximum of 0.5 sec for a central chord
Cross-track diameter of 39.8 km used for deployment plan.

Star training set for 12242_Koon, (2025/07/06 08:02UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.3 +16:33:30  0.8 12.91 160
44Zet Per      03:55:44.5 +31:57:26  2.8 15.60 168
PPM 119253     03:40:52.6 +16:37:04  6.2  0.63 172
PPM 119306     03:44:48.2 +16:29:58  8.1  0.33 171
12242_Koon     03:43:30.5 +16:36:27 16.6       171
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 12242_Koon, (2025/07/06 08:02UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 12.91 160
44Zet Per      03:54:07.9 +31:53:01  2.8 15.60 168
PPM 119253     03:39:25.8 +16:32:11  6.2  0.63 172
PPM 119306     03:43:21.4 +16:25:12  8.1  0.33 171
12242_Koon     03:42:03.6 +16:31:39 16.6       171
Positions are for J2000


Created by recondetail.pro, 2025/02/28 10:31:10 MT