Occultation event with (3317) Paris, event index number 5137
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/09 08:05:35 UTC
J2000 position of star is 05:47:52.2 -03:14:28
Equinox of date position of star is 05:49:13.0 -03:14:01
Star is 148 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=13.9
Use an exposure time of 1.40 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 27% with SNR of 2.7 for the occulted depth (per occulted point)
Apparent velocity is 18.9 km/sec on the sky relative to the star, or, 19.0 arcsec/hr.
Position angle of asteroid motion is 93.0 degrees
The recommended exposure time corresponds to 26.4 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 34.7 km.
The sky-plane scale is 3572.7 km/arcsec.
Diameter estimates:
125.3 km assuming a 5% albedo, maximum of 6.6 sec for a central chord
51.2 km assuming a 30% albedo, maximum of 2.7 sec for a central chord
Cross-track diameter of 118.8 km used for deployment plan.
Star training set for 3317_Paris, (2026/12/09 08:06UT) Object RA Dec mag sep mel Rigel 05:15:50.0 -08:10:21 0.1 9.66 144 34Del Ori 05:33:23.1 -00:16:53 2.2 4.94 152 PPM 188472 05:49:55.3 -04:05:21 6.0 0.87 147 PPM 188464 05:49:32.6 -03:10:59 9.1 0.10 148 3317_Paris 05:49:13.0 -03:14:01 13.9 148 Positions are for equinox of date
Star training set for 3317_Paris, (2026/12/09 08:06UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 9.66 144 34Del Ori 05:32:00.4 -00:17:57 2.2 4.94 152 PPM 188472 05:48:35.0 -04:05:46 6.0 0.87 147 PPM 188464 05:48:11.7 -03:11:25 9.1 0.10 148 3317_Paris 05:47:52.2 -03:14:28 13.9 148 Positions are for J2000