Occultation event with (4060) Deipylos, event index number 3607
Regions able to see the event: Australia
Geocentric closest approach at 2026/04/09 16:21:34 UTC
J2000 position of star is 11:44:13.7 +06:00:38
Equinox of date position of star is 11:45:34.8 +05:51:52
Star is 110 degrees from the moon. Moon is 55% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=13.9
Use an exposure time of 1.50 seconds with the standard RECON-QHY system.
SNR of 8.4 per integration for unocculted signal
Expected flux drop is 23% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 13.7 km/sec on the sky relative to the star, or, 17.8 arcsec/hr.
Position angle of asteroid motion is 126.4 degrees
The recommended exposure time corresponds to 20.6 km per image.
The 1-sigma error in the time of the event is 2.0 seconds.
The 1-sigma cross-track error in the shadow position is 29.1 km.
The sky-plane scale is 2779.1 km/arcsec.
Diameter estimates:
79.8 km assuming a 5% albedo, maximum of 5.8 sec for a central chord
32.6 km assuming a 30% albedo, maximum of 2.4 sec for a central chord
Cross-track diameter of 84.0 km used for deployment plan.
Star training set for 4060_Deipylos, (2026/04/09 16:22UT) Object RA Dec mag sep mel Regulus 10:09:46.1 +11:50:16 1.3 24.39 134 Denebola 11:50:23.9 +14:25:30 2.1 8.64 113 3Nu Vir 11:47:12.6 +06:22:55 4.0 0.66 110 PPM 158173 11:46:45.2 +06:53:02 7.9 1.06 110 PPM 158135 11:44:14.8 +06:14:13 8.8 0.50 111 PPM 158167 11:46:28.1 +05:31:47 11.3 0.40 110 4060_Deipylos 11:45:34.8 +05:51:52 13.9 110 Positions are for equinox of date
Star training set for 4060_Deipylos, (2026/04/09 16:22UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 24.39 134 Denebola 11:49:02.7 +14:34:16 2.1 8.64 113 3Nu Vir 11:45:51.5 +06:31:41 4.0 0.66 110 PPM 158173 11:45:24.1 +07:01:48 7.9 1.06 110 PPM 158135 11:42:53.8 +06:22:58 8.8 0.50 111 PPM 158167 11:45:07.1 +05:40:32 11.3 0.40 110 4060_Deipylos 11:44:13.7 +06:00:38 13.9 110 Positions are for J2000