Occultation event with (3794) Sthenelos, event index number 3454
Regions able to see the event: SAmericaN,NMexico,SMexico
Geocentric closest approach at 2026/03/17 06:28:12 UTC
J2000 position of star is 12:02:00.6 -02:36:06
Equinox of date position of star is 12:03:21.2 -02:44:52
Star is 152 degrees from the moon. Moon is 4% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 3.4 per integration for unocculted signal
Expected flux drop is 52% with SNR of 1.8 for the occulted depth (per occulted point)
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 18.7 arcsec/hr.
Position angle of asteroid motion is 109.6 degrees
The recommended exposure time corresponds to 8.3 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 24.4 km.
The sky-plane scale is 3574.3 km/arcsec.
Diameter estimates:
47.2 km assuming a 5% albedo, maximum of 2.5 sec for a central chord
19.3 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 34.5 km used for deployment plan.
Star training set for 3794_Sthenelos, (2026/03/17 06:28UT) Object RA Dec mag sep mel Spica 13:26:34.7 -11:17:50 1.0 22.33 130 4Gam Crv 12:17:09.5 -17:41:14 2.6 15.32 141 PPM 178683 12:07:20.4 -03:16:39 6.4 1.13 151 PPM 178671 12:04:52.4 -02:35:34 7.9 0.41 152 PPM 178665 12:03:18.6 -02:23:04 9.5 0.36 153 PPM 178667 12:03:56.6 -02:45:42 11.0 0.15 152 3794_Sthenelos 12:03:21.2 -02:44:52 15.8 152 Positions are for equinox of date
Star training set for 3794_Sthenelos, (2026/03/17 06:28UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 22.33 130 4Gam Crv 12:15:48.1 -17:32:30 2.6 15.32 141 PPM 178683 12:05:59.8 -03:07:54 6.4 1.13 151 PPM 178671 12:03:31.8 -02:26:49 7.9 0.41 152 PPM 178665 12:01:58.0 -02:14:19 9.5 0.36 153 PPM 178667 12:02:36.0 -02:36:57 11.0 0.15 152 3794_Sthenelos 12:02:00.6 -02:36:06 15.8 152 Positions are for J2000