Occultation event with (2148) Epeios, event index number 3537
Regions able to see the event: Europe
Geocentric closest approach at 2026/03/29 20:45:26 UTC
J2000 position of star is 11:51:11.6 +01:34:28
Equinox of date position of star is 11:52:32.4 +01:25:43
Star is 27 degrees from the moon. Moon is 89% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.55 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 46% with SNR of 1.5 for the occulted depth (per occulted point)
Apparent velocity is 17.0 km/sec on the sky relative to the star, or, 19.1 arcsec/hr.
Position angle of asteroid motion is 120.0 degrees
The recommended exposure time corresponds to 9.3 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 29.7 km.
The sky-plane scale is 3205.6 km/arcsec.
Diameter estimates:
41.3 km assuming a 5% albedo, maximum of 2.4 sec for a central chord
16.9 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 38.0 km used for deployment plan.
Star training set for 2148_Epeios, (2026/03/29 20:45UT) Object RA Dec mag sep mel Spica 13:26:34.8 -11:17:51 1.0 26.61 53 Denebola 11:50:23.8 +14:25:31 2.1 13.01 24 5Bet Vir 11:52:03.7 +01:37:00 3.6 0.22 27 PPM 158245 11:51:07.4 +02:05:08 8.0 0.75 26 PPM 158266 11:52:30.2 +01:38:22 10.0 0.21 27 2148_Epeios 11:52:32.4 +01:25:43 15.7 27 Positions are for equinox of date
Star training set for 2148_Epeios, (2026/03/29 20:45UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 26.61 53 Denebola 11:49:02.7 +14:34:16 2.1 13.01 24 5Bet Vir 11:50:43.0 +01:45:46 3.6 0.22 27 PPM 158245 11:49:46.7 +02:13:54 8.0 0.75 26 PPM 158266 11:51:09.4 +01:47:08 10.0 0.21 27 2148_Epeios 11:51:11.6 +01:34:28 15.7 27 Positions are for J2000