Occultation event with (5283) Pyrrhus, event index number 3713
Regions able to see the event: Europe
Geocentric closest approach at 2026/05/03 23:37:36 UTC
J2000 position of star is 12:43:07.3 +14:54:11
Equinox of date position of star is 12:44:26.5 +14:45:33
Star is 68 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=15.4, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 6.6 per integration for unocculted signal
Expected flux drop is 45% with SNR of 2.9 for the occulted depth (per occulted point)
Apparent velocity is 13.0 km/sec on the sky relative to the star, or, 13.7 arcsec/hr.
Position angle of asteroid motion is 81.1 degrees
The recommended exposure time corresponds to 11.7 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 34.8 km.
The sky-plane scale is 3424.6 km/arcsec.
Diameter estimates:
66.7 km assuming a 5% albedo, maximum of 5.1 sec for a central chord
27.2 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 48.4 km used for deployment plan.
Star training set for 5283_Pyrrhus, (2026/05/03 23:38UT) Object RA Dec mag sep mel Arcturus 14:16:51.9 +19:02:49 0.0 22.50 55 Vindemiatrix 13:03:29.3 +10:49:05 2.8 6.09 62 29 Com 12:50:13.4 +13:58:46 5.6 1.60 66 PPM 129222 12:40:29.5 +14:10:58 8.4 1.12 68 PPM 129281 12:45:10.3 +14:58:06 8.7 0.27 68 PPM 129267 12:44:14.2 +14:54:02 11.0 0.15 68 5283_Pyrrhus 12:44:26.5 +14:45:33 15.2 67 Positions are for equinox of date
Star training set for 5283_Pyrrhus, (2026/05/03 23:38UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 22.50 55 Vindemiatrix 13:02:10.1 +10:57:33 2.8 6.09 62 29 Com 12:48:54.3 +14:07:21 5.6 1.60 66 PPM 129222 12:39:10.0 +14:19:38 8.4 1.12 68 PPM 129281 12:43:51.2 +15:06:44 8.7 0.27 68 PPM 129267 12:42:55.0 +15:02:40 11.0 0.15 68 5283_Pyrrhus 12:43:07.3 +14:54:11 15.2 68 Positions are for J2000