Occultation event with (1867) Deiphobus, event index number 4472
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/10/24 06:29:03 UTC
J2000 position of star is 06:02:30.3 +35:47:21
Equinox of date position of star is 06:04:18.6 +35:47:13
Star is 84 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=13.8
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 3.4 per integration for unocculted signal
Expected flux drop is 8% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 4.3 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
Position angle of asteroid motion is 87.8 degrees
The recommended exposure time corresponds to 8.5 km per image.
The 1-sigma error in the time of the event is 3.8 seconds.
The 1-sigma cross-track error in the shadow position is 34.9 km.
The sky-plane scale is 3468.4 km/arcsec.
Diameter estimates:
130.0 km assuming a 5% albedo, maximum of 30.6 sec for a central chord
53.1 km assuming a 30% albedo, maximum of 12.5 sec for a central chord
Cross-track diameter of 118.2 km used for deployment plan.
Star training set for 1867_Deiphobus, (2026/10/24 06:29UT) Object RA Dec mag sep mel Pollux 07:46:57.2 +27:57:33 1.1 23.07 107 34Bet Aur 06:01:29.8 +44:56:50 1.9 9.18 83 PPM 071196 06:07:20.2 +33:35:42 6.1 2.28 85 PPM 071107 06:02:52.7 +35:15:27 8.4 0.60 84 PPM 071170 06:05:59.5 +36:02:48 9.8 0.43 84 PPM 071124 06:03:43.0 +35:44:24 10.1 0.13 84 1867_Deiphobus 06:04:18.6 +35:47:13 13.8 84 Positions are for equinox of date
Star training set for 1867_Deiphobus, (2026/10/24 06:29UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 23.07 107 34Bet Aur 05:59:31.6 +44:56:51 1.9 9.18 83 PPM 071196 06:05:34.0 +33:35:57 6.1 2.28 85 PPM 071107 06:01:04.9 +35:15:32 8.4 0.60 84 PPM 071170 06:04:11.0 +36:03:00 9.8 0.43 84 PPM 071124 06:01:54.8 +35:44:31 10.1 0.13 84 1867_Deiphobus 06:02:30.3 +35:47:21 13.8 84 Positions are for J2000