Occultation event with (3317) Paris, event index number 3888
Regions able to see the event: Australia
Geocentric closest approach at 2026/07/25 20:27:22 UTC
J2000 position of star is 05:31:55.0 +01:16:11
Equinox of date position of star is 05:33:17.5 +01:17:15
Star is 153 degrees from the moon. Moon is 87% illuminated.
Stellar brightness G=15.4, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 6.2 per integration for unocculted signal
Expected flux drop is 33% with SNR of 2.0 for the occulted depth (per occulted point)
Apparent velocity is 33.6 km/sec on the sky relative to the star, or, 26.0 arcsec/hr.
Position angle of asteroid motion is 93.7 degrees
The recommended exposure time corresponds to 28.6 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 33.4 km.
The sky-plane scale is 4657.9 km/arcsec.
Diameter estimates:
125.3 km assuming a 5% albedo, maximum of 3.7 sec for a central chord
51.2 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 118.8 km used for deployment plan.
Star training set for 3317_Paris, (2026/07/25 20:27UT) Object RA Dec mag sep mel Betelgeuse 05:56:36.6 +07:24:35 0.4 8.44 158 34Del Ori 05:33:21.9 -00:16:54 2.2 1.57 152 PPM 149035 05:31:17.5 +01:48:30 5.4 0.72 154 PPM 149086 05:32:52.6 +01:42:29 7.6 0.43 154 PPM 149074 05:32:18.7 +01:09:52 9.7 0.27 153 3317_Paris 05:33:17.5 +01:17:15 14.6 153 Positions are for equinox of date
Star training set for 3317_Paris, (2026/07/25 20:27UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 8.44 158 34Del Ori 05:32:00.4 -00:17:57 2.2 1.57 152 PPM 149035 05:29:54.7 +01:47:22 5.4 0.72 154 PPM 149086 05:31:29.8 +01:41:24 7.6 0.43 154 PPM 149074 05:30:56.3 +01:08:46 9.7 0.27 153 3317_Paris 05:31:55.0 +01:16:11 14.6 153 Positions are for J2000