Occultation event with (4086) Podalirius, event index number 3479
Regions able to see the event: Australia
Geocentric closest approach at 2026/03/21 20:29:00 UTC
J2000 position of star is 13:36:24.2 +08:00:34
Equinox of date position of star is 13:37:42.8 +07:52:35
Star is 152 degrees from the moon. Moon is 10% illuminated.
Stellar brightness G=14.0, apparent brightess of occulting body is G=14.7
Use an exposure time of 0.30 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 66% with SNR of 6.5 for the occulted depth (per occulted point)
Apparent velocity is 17.0 km/sec on the sky relative to the star, or, 17.5 arcsec/hr.
Position angle of asteroid motion is 109.7 degrees
The recommended exposure time corresponds to 5.1 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 17.7 km.
The sky-plane scale is 3502.4 km/arcsec.
Diameter estimates:
83.6 km assuming a 5% albedo, maximum of 4.9 sec for a central chord
34.1 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 85.5 km used for deployment plan.
Star training set for 4086_Podalirius, (2026/03/21 20:29UT) Object RA Dec mag sep mel Arcturus 14:16:51.5 +19:02:51 0.0 14.66 142 Vindemiatrix 13:03:28.9 +10:49:08 2.8 8.94 145 PPM 159803 13:31:19.0 +07:02:39 6.2 1.79 152 PPM 159868 13:35:18.6 +08:38:54 8.5 0.97 151 PPM 159897 13:37:10.5 +08:09:35 8.6 0.31 151 PPM 159911 13:38:28.2 +08:00:43 10.2 0.23 151 4086_Podaliriu 13:37:42.8 +07:52:35 14.7 152 Positions are for equinox of date
Star training set for 4086_Podalirius, (2026/03/21 20:29UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 14.66 142 Vindemiatrix 13:02:10.1 +10:57:33 2.8 8.94 145 PPM 159803 13:30:00.1 +07:10:44 6.2 1.79 152 PPM 159868 13:34:00.1 +08:46:55 8.5 0.97 151 PPM 159897 13:35:52.0 +08:17:34 8.6 0.31 151 PPM 159911 13:37:09.6 +08:08:41 10.2 0.23 151 4086_Podaliriu 13:36:24.2 +08:00:34 14.7 152 Positions are for J2000