Occultation event with (4827) Dares, event index number 5081
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/06 23:31:19 UTC
J2000 position of star is 05:48:29.9 +19:41:27
Equinox of date position of star is 05:50:05.6 +19:41:52
Star is 144 degrees from the moon. Moon is 4% illuminated.
Stellar brightness G=13.9, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 76% with SNR of 7.3 for the occulted depth (per occulted point)
Apparent velocity is 16.1 km/sec on the sky relative to the star, or, 20.2 arcsec/hr.
Position angle of asteroid motion is 81.5 degrees
The recommended exposure time corresponds to 4.0 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 31.1 km.
The sky-plane scale is 2883.2 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, (2026/12/06 23:31UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.8 +07:24:35 0.4 12.39 138 Alnath 05:27:59.8 +28:37:39 1.6 10.25 150 PPM 121513 05:53:59.2 +19:52:21 6.4 0.93 143 PPM 121502 05:53:27.7 +19:31:34 7.1 0.81 143 PPM 121430 05:50:43.9 +19:49:19 10.0 0.19 144 4827_Dares 05:50:05.6 +19:41:52 15.1 143 Positions are for equinox of date
Star training set for 4827_Dares, (2026/12/06 23:31UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 12.39 138 Alnath 05:26:17.6 +28:36:22 1.6 10.25 150 PPM 121513 05:52:23.4 +19:52:04 6.4 0.93 143 PPM 121502 05:51:52.1 +19:31:17 7.1 0.81 143 PPM 121430 05:49:08.1 +19:48:56 10.0 0.19 144 4827_Dares 05:48:29.9 +19:41:27 15.1 144 Positions are for J2000