RECON observing guide for 34746_Thoon_20250713100823

Occultation event with (34746) Thoon, event index number 1135
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/07/13 10:08:23 UTC

J2000 position of star is 02:44:22.4 -10:50:09
Equinox of date position of star is 02:45:36.6 -10:43:44
Star is 73 degrees from the moon. Moon is 93% illuminated.
Stellar brightness G=14.4, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 9.3 per integration for unocculted signal
Expected flux drop is 74% with SNR of 6.9 for the occulted depth (per occulted point)

Apparent velocity is 21.4 km/sec on the sky relative to the star, or, 20.2 arcsec/hr.
The recommended exposure time corresponds to 8.6 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 19.4 km.
The sky-plane scale is 3820.2 km/arcsec.

Diameter estimates:
64.0 km assuming a 5% albedo, aximum of 3.0 sec for a central chord
26.1 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 64.0 km used for deployment plan.

Star training set for 34746_Thoon, (2025/07/13 10:08UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:46.0 -08:10:27  0.1 37.10 109
68Omi Cet      02:20:38.3 -02:51:47  2.0 10.01  69
83Eps Cet      02:40:48.0 -11:45:54  4.3  1.57  72
PPM 212038     02:50:34.4 -10:26:46  7.9  1.25  75
PPM 211934     02:45:59.1 -10:51:22  9.6  0.16  73
34746_Thoon    02:45:36.6 -10:43:44 15.5        74
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 34746_Thoon, (2025/07/13 10:08UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 37.10 109
68Omi Cet      02:19:20.8 -02:58:46  2.0 10.01  69
83Eps Cet      02:39:34.1 -11:52:26  4.3  1.57  72
PPM 212038     02:49:20.1 -10:33:03  7.9  1.25  75
PPM 211934     02:44:45.0 -10:57:47  9.6  0.16  73
34746_Thoon    02:44:22.4 -10:50:09 15.5        73
Positions are for J2000


Created by recondetail.pro, 2025/02/28 11:03:54 MT