Occultation event with (4827) Dares, event index number 3374
Regions able to see the event: NMexico
Geocentric closest approach at 2026/03/08 02:51:20 UTC
J2000 position of star is 03:07:28.2 +17:51:12
Equinox of date position of star is 03:08:57.0 +17:57:09
Star is 171 degrees from the moon. Moon is 79% illuminated.
Stellar brightness G=14.5, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
SNR of 7.9 per integration for unocculted signal
Expected flux drop is 82% with SNR of 6.5 for the occulted depth (per occulted point)
Apparent velocity is 27.1 km/sec on the sky relative to the star, or, 25.4 arcsec/hr.
Position angle of asteroid motion is 78.4 degrees
The recommended exposure time corresponds to 9.5 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 27.7 km.
The sky-plane scale is 3836.3 km/arcsec.
Diameter estimates:
46.3 km assuming a 5% albedo, maximum of 1.7 sec for a central chord
18.9 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 42.8 km used for deployment plan.
Star training set for 4827_Dares, (2026/03/08 02:51UT) Object RA Dec mag sep mel Aldebaran 04:37:25.6 +16:33:35 0.8 21.16 150 Menkar 03:03:39.1 +04:11:27 2.5 13.82 163 57Del Ari 03:13:07.9 +19:49:26 4.3 2.12 170 PPM 118805 03:07:16.2 +18:16:48 8.5 0.52 172 PPM 118817 03:07:58.2 +17:42:29 8.9 0.34 171 4827_Dares 03:08:57.0 +17:57:09 16.1 171 Positions are for equinox of date
Star training set for 4827_Dares, (2026/03/08 02:51UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 21.16 150 Menkar 03:02:16.8 +04:05:21 2.5 13.82 163 57Del Ari 03:11:38.0 +19:43:36 4.3 2.12 170 PPM 118805 03:05:47.4 +18:10:47 8.5 0.52 172 PPM 118817 03:06:29.6 +17:36:30 8.9 0.34 171 4827_Dares 03:07:28.2 +17:51:12 16.1 171 Positions are for J2000