Occultation event with (1867) Deiphobus, event index number 4501
Regions able to see the event: SAmericaN,Senegal
Geocentric closest approach at 2026/10/28 04:30:40 UTC
J2000 position of star is 06:01:48.9 +35:46:54
Equinox of date position of star is 06:03:37.2 +35:46:48
Star is 29 degrees from the moon. Moon is 94% illuminated.
Stellar brightness G=13.2, apparent brightess of occulting body is G=13.8
Use an exposure time of 0.15 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 62% with SNR of 6.1 for the occulted depth (per occulted point)
Apparent velocity is 6.0 km/sec on the sky relative to the star, or, 6.3 arcsec/hr.
Position angle of asteroid motion is 86.2 degrees
The recommended exposure time corresponds to 0.9 km per image.
The 1-sigma error in the time of the event is 2.5 seconds.
The 1-sigma cross-track error in the shadow position is 35.2 km.
The sky-plane scale is 3431.2 km/arcsec.
Diameter estimates:
130.0 km assuming a 5% albedo, maximum of 21.6 sec for a central chord
53.1 km assuming a 30% albedo, maximum of 8.8 sec for a central chord
Cross-track diameter of 118.2 km used for deployment plan.
Star training set for 1867_Deiphobus, (2026/10/28 04:31UT) Object RA Dec mag sep mel Pollux 07:46:57.3 +27:57:33 1.1 23.21 51 34Bet Aur 06:01:29.8 +44:56:50 1.9 9.18 32 PPM 071196 06:07:20.3 +33:35:42 6.1 2.31 29 PPM 071084 06:01:36.2 +36:02:41 7.9 0.49 29 PPM 071090 06:01:58.2 +35:43:17 9.8 0.34 29 PPM 071124 06:03:43.1 +35:44:24 10.1 0.04 29 1867_Deiphobus 06:03:37.2 +35:46:48 13.8 29 Positions are for equinox of date
Star training set for 1867_Deiphobus, (2026/10/28 04:31UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 23.21 51 34Bet Aur 05:59:31.6 +44:56:51 1.9 9.18 32 PPM 071196 06:05:34.0 +33:35:57 6.1 2.31 29 PPM 071084 05:59:47.6 +36:02:43 7.9 0.49 29 PPM 071090 06:00:09.9 +35:43:20 9.8 0.34 29 PPM 071124 06:01:54.8 +35:44:31 10.1 0.04 29 1867_Deiphobus 06:01:48.9 +35:46:54 13.8 29 Positions are for J2000