Occultation event with (4827) Dares, event index number 3229
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/02/10 00:11:56 UTC
J2000 position of star is 02:52:22.9 +17:09:40
Equinox of date position of star is 02:53:50.6 +17:16:01
Star is 168 degrees from the moon. Moon is 46% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=16.0
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 36% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 16.1 arcsec/hr.
Position angle of asteroid motion is 80.8 degrees
The recommended exposure time corresponds to 19.1 km per image.
The 1-sigma error in the time of the event is 0.6 seconds.
The 1-sigma cross-track error in the shadow position is 26.7 km.
The sky-plane scale is 3549.4 km/arcsec.
Diameter estimates:
46.3 km assuming a 5% albedo, maximum of 2.9 sec for a central chord
18.9 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 42.8 km used for deployment plan.
Star training set for 4827_Dares, (2026/02/10 00:12UT) Object RA Dec mag sep mel Aldebaran 04:37:25.3 +16:33:35 0.8 24.77 163 Hamal 02:08:39.1 +23:35:05 2.0 12.32 161 42Pi Ari 02:50:45.3 +17:34:17 5.1 0.80 168 PPM 118656 02:56:23.3 +17:50:21 7.4 0.83 169 PPM 118626 02:53:54.8 +17:17:38 9.9 0.03 168 4827_Dares 02:53:50.6 +17:16:01 16.0 169 Positions are for equinox of date
Star training set for 4827_Dares, (2026/02/10 00:12UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 24.77 163 Hamal 02:07:10.8 +23:27:41 2.0 12.32 161 42Pi Ari 02:49:17.5 +17:27:52 5.1 0.80 168 PPM 118656 02:54:55.2 +17:44:04 7.4 0.83 169 PPM 118626 02:52:27.1 +17:11:17 9.9 0.03 168 4827_Dares 02:52:22.9 +17:09:40 16.0 168 Positions are for J2000