Occultation event with (4715) Medesicaste, event index number 3422
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/03/14 00:00:26 UTC
J2000 position of star is 02:55:06.0 +32:12:28
Equinox of date position of star is 02:56:41.9 +32:18:46
Star is 119 degrees from the moon. Moon is 26% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 3.6 per integration for unocculted signal
Expected flux drop is 45% with SNR of 1.6 for the occulted depth (per occulted point)
Apparent velocity is 28.8 km/sec on the sky relative to the star, or, 26.1 arcsec/hr.
Position angle of asteroid motion is 80.2 degrees
The recommended exposure time corresponds to 14.4 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 21.6 km.
The sky-plane scale is 3970.2 km/arcsec.
Diameter estimates:
65.5 km assuming a 5% albedo, maximum of 2.3 sec for a central chord
26.7 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 62.1 km used for deployment plan.
Star training set for 4715_Medesicaste, (2026/03/14 00:00UT) Object RA Dec mag sep mel Aldebaran 04:37:25.6 +16:33:35 0.8 27.69 137 Algol 03:09:53.1 +41:03:17 2.1 9.13 123 21 Per 02:58:53.2 +32:02:17 5.1 0.54 119 PPM 067885 02:55:31.9 +31:48:07 8.1 0.57 118 PPM 067906 02:56:44.0 +32:42:06 9.9 0.39 119 PPM 067896 02:56:12.2 +32:23:09 10.6 0.13 119 4715_Medesicas 02:56:41.9 +32:18:46 15.5 119 Positions are for equinox of date
Star training set for 4715_Medesicaste, (2026/03/14 00:00UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 27.69 137 Algol 03:08:10.1 +40:57:20 2.1 9.13 123 21 Per 02:57:17.3 +31:56:02 5.1 0.54 119 PPM 067885 02:53:56.4 +31:41:47 8.1 0.57 118 PPM 067906 02:55:07.9 +32:35:49 9.9 0.39 119 PPM 067896 02:54:36.3 +32:16:50 10.6 0.13 119 4715_Medesicas 02:55:06.0 +32:12:28 15.5 119 Positions are for J2000