Occultation event with (4501) Eurypylos, event index number 3845
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/07/14 01:55:41 UTC
J2000 position of star is 12:31:21.8 -09:25:32
Equinox of date position of star is 12:32:44.2 -09:34:18
Star is 84 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=16.4
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 84% with SNR of 7.9 for the occulted depth (per occulted point)
Apparent velocity is 18.1 km/sec on the sky relative to the star, or, 16.3 arcsec/hr.
Position angle of asteroid motion is 100.9 degrees
The recommended exposure time corresponds to 9.1 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 34.1 km.
The sky-plane scale is 3998.2 km/arcsec.
Diameter estimates:
47.2 km assuming a 5% albedo, maximum of 2.6 sec for a central chord
19.3 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 45.5 km used for deployment plan.
Star training set for 4501_Eurypylos, (2026/07/14 01:56UT) Object RA Dec mag sep mel Spica 13:26:35.7 -11:17:56 1.0 13.35 97 4Gam Crv 12:17:10.5 -17:41:21 2.6 8.95 85 21 Vir 12:35:09.0 -09:35:53 5.6 0.60 85 PPM 195573 12:32:47.8 -09:19:41 7.4 0.24 84 PPM 195570 12:32:32.7 -09:38:00 8.8 0.08 84 4501_Eurypylos 12:32:44.2 -09:34:18 16.4 85 Positions are for equinox of date
Star training set for 4501_Eurypylos, (2026/07/14 01:56UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 13.35 97 4Gam Crv 12:15:48.1 -17:32:30 2.6 8.95 85 21 Vir 12:33:46.6 -09:27:07 5.6 0.60 85 PPM 195573 12:31:25.4 -09:10:54 7.4 0.24 84 PPM 195570 12:31:10.3 -09:29:13 8.8 0.08 84 4501_Eurypylos 12:31:21.8 -09:25:32 16.4 84 Positions are for J2000