Occultation event with (5436) Eumelos, event index number 3588
Regions able to see the event: Australia
Geocentric closest approach at 2026/04/06 09:19:07 UTC
J2000 position of star is 11:39:43.6 -07:20:47
Equinox of date position of star is 11:41:03.9 -07:29:32
Star is 66 degrees from the moon. Moon is 83% illuminated.
Stellar brightness G=12.0, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 20.9 per integration for unocculted signal
Expected flux drop is 95% with SNR of 19.8 for the occulted depth (per occulted point)
Apparent velocity is 15.0 km/sec on the sky relative to the star, or, 18.4 arcsec/hr.
Position angle of asteroid motion is 120.3 degrees
The recommended exposure time corresponds to 1.8 km per image.
The 1-sigma error in the time of the event is 2.1 seconds.
The 1-sigma cross-track error in the shadow position is 25.0 km.
The sky-plane scale is 2941.2 km/arcsec.
Diameter estimates:
48.8 km assuming a 5% albedo, maximum of 3.2 sec for a central chord
19.9 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 37.7 km used for deployment plan.
Star training set for 5436_Eumelos, (2026/04/06 09:19UT) Object RA Dec mag sep mel Spica 13:26:34.8 -11:17:51 1.0 26.29 41 4Gam Crv 12:17:09.6 -17:41:15 2.6 13.46 54 PPM 194769 11:45:15.7 -06:49:24 6.1 1.24 65 PPM 194671 11:40:09.7 -07:44:44 8.4 0.34 66 PPM 194682 11:40:40.8 -07:33:46 9.2 0.12 66 5436_Eumelos 11:41:03.9 -07:29:32 15.2 66 Positions are for equinox of date
Star training set for 5436_Eumelos, (2026/04/06 09:19UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 26.29 41 4Gam Crv 12:15:48.1 -17:32:30 2.6 13.46 54 PPM 194769 11:43:55.2 -06:40:39 6.1 1.24 65 PPM 194671 11:38:49.4 -07:36:00 8.4 0.34 66 PPM 194682 11:39:20.4 -07:25:01 9.2 0.12 66 5436_Eumelos 11:39:43.6 -07:20:47 15.2 66 Positions are for J2000