RECON observing guide for 4068_Menestheus_20250620231722

Occultation event with (4068) Menestheus, event index number 1077
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/06/20 23:17:22 UTC

J2000 position of star is 08:57:59.0 +07:57:54
Equinox of date position of star is 08:59:20.7 +07:51:55
Star is 106 degrees from the moon. Moon is 26% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 3.4 per integration for unocculted signal
Expected flux drop is 36% with SNR of 1.2 for the occulted depth (per occulted point)

Apparent velocity is 34.9 km/sec on the sky relative to the star, or, 32.0 arcsec/hr.
The recommended exposure time corresponds to 17.4 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 6.3 km.
The sky-plane scale is 3917.4 km/arcsec.

Diameter estimates:
71.1 km assuming a 5% albedo, aximum of 2.0 sec for a central chord
29.0 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 71.1 km used for deployment plan.

Star training set for 4068_Menestheus, (2025/06/20 23:17UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.5 +11:50:30  1.3 17.78 121
16Zet Hya      08:56:44.3 +05:50:50  3.1  2.12 106
PPM 155267     09:00:07.3 +08:07:25  7.6  0.32 107
PPM 155248     08:59:10.7 +07:51:52  9.0  0.04 106
4068_Menestheu 08:59:20.7 +07:51:55 15.1       107
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 4068_Menestheus, (2025/06/20 23:17UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 17.78 121
16Zet Hya      08:55:23.5 +05:56:44  3.1  2.12 106
PPM 155267     08:58:45.5 +08:13:25  7.6  0.32 107
PPM 155248     08:57:49.0 +07:57:51  9.0  0.04 106
4068_Menestheu 08:57:59.0 +07:57:54 15.1       106
Positions are for J2000


Created by recondetail.pro, 2025/03/15 09:51:57 MT