RECON observing guide for 5436_Eumelos_20250621215902

Occultation event with (5436) Eumelos, event index number 1083
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/06/21 21:59:02 UTC

J2000 position of star is 09:40:57.3 +06:51:01
Equinox of date position of star is 09:42:17.9 +06:44:00
Star is 103 degrees from the moon. Moon is 17% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
SNR of 4.9 per integration for unocculted signal
Expected flux drop is 71% with SNR of 3.5 for the occulted depth (per occulted point)

Apparent velocity is 30.7 km/sec on the sky relative to the star, or, 28.3 arcsec/hr.
The recommended exposure time corresponds to 10.7 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 25.8 km.
The sky-plane scale is 3904.6 km/arcsec.

Diameter estimates:
48.5 km assuming a 5% albedo, aximum of 1.6 sec for a central chord
19.8 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 48.5 km used for deployment plan.

Star training set for 5436_Eumelos, (2025/06/21 21:59UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.6 +11:50:30  1.3  8.48 108
10 Leo         09:38:33.2 +06:43:13  6.1  0.93 102
PPM 156114     09:43:47.5 +07:16:38  8.3  0.66 103
PPM 156105     09:43:22.3 +06:36:52  8.6  0.29 104
5436_Eumelos   09:42:17.9 +06:44:00 16.0       104
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 5436_Eumelos, (2025/06/21 21:59UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  8.48 108
10 Leo         09:37:12.5 +06:50:09  6.1  0.93 102
PPM 156114     09:42:26.7 +07:23:40  8.3  0.66 103
PPM 156105     09:42:01.8 +06:43:54  8.6  0.29 104
5436_Eumelos   09:40:57.3 +06:51:01 16.0       103
Positions are for J2000


Created by recondetail.pro, 2025/03/15 09:59:09 MT