Occultation event with (4827) Dares, event index number 4113
Regions able to see the event: Europe
Geocentric closest approach at 2026/08/28 01:28:24 UTC
J2000 position of star is 05:45:01.7 +21:40:39
Equinox of date position of star is 05:46:37.8 +21:41:12
Star is 113 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 3.2 per integration for unocculted signal
Expected flux drop is 57% with SNR of 1.8 for the occulted depth (per occulted point)
Apparent velocity is 24.2 km/sec on the sky relative to the star, or, 23.0 arcsec/hr.
Position angle of asteroid motion is 94.5 degrees
The recommended exposure time corresponds to 10.9 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 30.5 km.
The sky-plane scale is 3780.8 km/arcsec.
Diameter estimates:
46.3 km assuming a 5% albedo, maximum of 1.9 sec for a central chord
18.9 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 42.8 km used for deployment plan.
Star training set for 4827_Dares, (2026/08/28 01:28UT) Object RA Dec mag sep mel Betelgeuse 05:56:36.9 +07:24:35 0.4 14.48 114 Alnath 05:27:58.8 +28:37:39 1.6 8.12 109 PPM 094621 05:41:03.3 +21:46:32 6.4 1.30 112 PPM 094790 05:46:32.2 +21:28:12 8.5 0.22 113 PPM 094820 05:47:29.7 +21:44:24 8.7 0.21 113 4827_Dares 05:46:37.8 +21:41:12 16.1 114 Positions are for equinox of date
Star training set for 4827_Dares, (2026/08/28 01:28UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 14.48 114 Alnath 05:26:17.6 +28:36:22 1.6 8.12 109 PPM 094621 05:39:27.1 +21:45:46 6.4 1.30 112 PPM 094790 05:44:56.2 +21:27:39 8.5 0.22 113 PPM 094820 05:45:53.6 +21:43:53 8.7 0.21 113 4827_Dares 05:45:01.7 +21:40:39 16.1 113 Positions are for J2000