Occultation event with (4086) Podalirius, event index number 3654
Regions able to see the event: Europe
Geocentric closest approach at 2026/04/19 01:29:51 UTC
J2000 position of star is 13:22:22.9 +08:49:28
Equinox of date position of star is 13:23:41.8 +08:41:15
Star is 139 degrees from the moon. Moon is 4% illuminated.
Stellar brightness G=12.5, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 15.2 per integration for unocculted signal
Expected flux drop is 88% with SNR of 13.4 for the occulted depth (per occulted point)
Apparent velocity is 18.4 km/sec on the sky relative to the star, or, 19.0 arcsec/hr.
Position angle of asteroid motion is 96.6 degrees
The recommended exposure time corresponds to 2.2 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 24.2 km.
The sky-plane scale is 3492.1 km/arcsec.
Diameter estimates:
83.6 km assuming a 5% albedo, maximum of 4.5 sec for a central chord
34.1 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 85.5 km used for deployment plan.
Star training set for 4086_Podalirius, (2026/04/19 01:30UT) Object RA Dec mag sep mel Arcturus 14:16:51.8 +19:02:49 0.0 16.53 136 Vindemiatrix 13:03:29.2 +10:49:06 2.8 5.42 134 59 Vir 13:18:04.9 +09:17:14 5.7 1.51 138 PPM 159669 13:21:16.1 +08:20:58 8.0 0.69 139 PPM 159710 13:23:48.2 +08:44:46 9.2 0.06 139 4086_Podaliriu 13:23:41.8 +08:41:15 14.6 140 Positions are for equinox of date
Star training set for 4086_Podalirius, (2026/04/19 01:30UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 16.53 136 Vindemiatrix 13:02:10.1 +10:57:33 2.8 5.42 134 59 Vir 13:16:45.9 +09:25:31 5.7 1.51 138 PPM 159669 13:19:57.0 +08:29:13 8.0 0.69 139 PPM 159710 13:22:29.3 +08:52:58 9.2 0.06 139 4086_Podaliriu 13:22:22.9 +08:49:28 14.6 139 Positions are for J2000