Occultation event with (3317) Paris, event index number 4503
Regions able to see the event: NZ
Geocentric closest approach at 2026/10/28 13:10:59 UTC
J2000 position of star is 06:03:05.4 -02:21:03
Equinox of date position of star is 06:04:26.4 -02:21:12
Star is 38 degrees from the moon. Moon is 92% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=14.2
Use an exposure time of 1.15 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 33% with SNR of 3.3 for the occulted depth (per occulted point)
Apparent velocity is 9.2 km/sec on the sky relative to the star, or, 8.8 arcsec/hr.
Position angle of asteroid motion is 43.6 degrees
The recommended exposure time corresponds to 10.6 km per image.
The 1-sigma error in the time of the event is 3.6 seconds.
The 1-sigma cross-track error in the shadow position is 14.7 km.
The sky-plane scale is 3794.1 km/arcsec.
Diameter estimates:
125.3 km assuming a 5% albedo, maximum of 13.6 sec for a central chord
51.2 km assuming a 30% albedo, maximum of 5.5 sec for a central chord
Cross-track diameter of 118.8 km used for deployment plan.
Star training set for 3317_Paris, (2026/10/28 13:11UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.5 +07:24:35 0.4 9.96 30 34Del Ori 05:33:22.7 -00:16:53 2.2 8.03 32 PPM 188676 06:01:23.9 -03:04:31 4.7 1.05 38 PPM 188741 06:04:40.0 -02:28:52 7.7 0.14 38 3317_Paris 06:04:26.4 -02:21:12 14.2 38 Positions are for equinox of date
Star training set for 3317_Paris, (2026/10/28 13:11UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.96 30 34Del Ori 05:32:00.4 -00:17:57 2.2 8.03 32 PPM 188676 06:00:03.4 -03:04:29 4.7 1.05 38 PPM 188741 06:03:19.1 -02:28:43 7.7 0.14 38 3317_Paris 06:03:05.4 -02:21:03 14.2 38 Positions are for J2000