Occultation event with (20424) 98VF30, event index number 3710
Regions able to see the event: Australia
Geocentric closest approach at 2026/05/03 11:03:54 UTC
J2000 position of star is 12:32:14.3 +25:38:38
Equinox of date position of star is 12:33:32.9 +25:29:56
Star is 71 degrees from the moon. Moon is 97% illuminated.
Stellar brightness G=16.7, apparent brightess of occulting body is G=16.0
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 35% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 13.9 km/sec on the sky relative to the star, or, 14.8 arcsec/hr.
Position angle of asteroid motion is 62.2 degrees
The recommended exposure time corresponds to 17.4 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 38.2 km.
The sky-plane scale is 3387.1 km/arcsec.
Diameter estimates:
45.3 km assuming a 5% albedo, maximum of 3.3 sec for a central chord
18.5 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 45.8 km used for deployment plan.
Star training set for 20424_98VF30, (2026/05/03 11:04UT) Object RA Dec mag sep mel Arcturus 14:16:51.9 +19:02:49 0.0 24.71 51 Denebola 11:50:24.1 +14:25:29 2.1 15.00 72 21 Com 12:32:19.4 +24:25:18 5.5 1.11 70 PPM 101960 12:32:52.1 +25:43:31 8.2 0.27 71 20424_98VF30 12:33:32.9 +25:29:56 16.0 71 Positions are for equinox of date
Star training set for 20424_98VF30, (2026/05/03 11:04UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 24.71 51 Denebola 11:49:02.7 +14:34:16 2.1 15.00 72 21 Com 12:31:00.6 +24:34:01 5.5 1.11 70 PPM 101960 12:31:33.5 +25:52:13 8.2 0.27 71 20424_98VF30 12:32:14.3 +25:38:38 16.0 71 Positions are for J2000