Occultation event with (2146) Stentor, event index number 3410
Regions able to see the event: Europe,Australia
Geocentric closest approach at 2026/03/12 17:41:32 UTC
J2000 position of star is 12:09:34.2 +33:41:12
Equinox of date position of star is 12:10:53.7 +33:32:27
Star is 109 degrees from the moon. Moon is 38% illuminated.
Stellar brightness G=10.7, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 42.0 per integration for unocculted signal
Expected flux drop is 99% with SNR of 41.4 for the occulted depth (per occulted point)
Apparent velocity is 20.0 km/sec on the sky relative to the star, or, 21.5 arcsec/hr.
Position angle of asteroid motion is 132.8 degrees
The recommended exposure time corresponds to 2.4 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 25.7 km.
The sky-plane scale is 3351.4 km/arcsec.
Diameter estimates:
59.4 km assuming a 5% albedo, maximum of 3.0 sec for a central chord
24.3 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 50.8 km used for deployment plan.
Star training set for 2146_Stentor, (2026/03/12 17:42UT) Object RA Dec mag sep mel Arcturus 14:16:51.5 +19:02:51 0.0 31.55 78 68Del Leo 11:15:29.9 +20:22:47 2.6 18.01 116 PPM 076381 12:17:48.8 +32:54:55 6.1 1.58 108 PPM 076328 12:12:51.5 +34:06:44 7.8 0.70 109 PPM 076282 12:08:46.1 +33:33:56 10.0 0.44 110 PPM 076310 12:11:01.0 +33:20:28 11.2 0.20 109 2146_Stentor 12:10:53.7 +33:32:27 15.3 109 Positions are for equinox of date
Star training set for 2146_Stentor, (2026/03/12 17:42UT) Object RA Dec mag sep mel Arcturus 14:15:37.7 +19:10:06 0.0 31.55 78 68Del Leo 11:14:06.8 +20:31:22 2.6 18.01 116 PPM 076381 12:16:30.0 +33:03:39 6.1 1.58 108 PPM 076328 12:11:32.2 +34:15:28 7.8 0.70 109 PPM 076282 12:07:26.4 +33:42:41 10.0 0.44 110 PPM 076310 12:09:41.5 +33:29:13 11.2 0.20 109 2146_Stentor 12:09:34.2 +33:41:12 15.3 109 Positions are for J2000