Occultation event with (1867) Deiphobus, event index number 4194
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/07 08:42:33 UTC
J2000 position of star is 05:52:35.1 +35:38:41
Equinox of date position of star is 05:54:22.7 +35:38:56
Star is 28 degrees from the moon. Moon is 18% illuminated.
Stellar brightness G=11.6, apparent brightess of occulting body is G=14.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 25.7 per integration for unocculted signal
Expected flux drop is 91% with SNR of 23.3 for the occulted depth (per occulted point)
Apparent velocity is 17.9 km/sec on the sky relative to the star, or, 16.2 arcsec/hr.
Position angle of asteroid motion is 87.7 degrees
The recommended exposure time corresponds to 2.1 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 34.1 km.
The sky-plane scale is 3974.7 km/arcsec.
Diameter estimates:
130.0 km assuming a 5% albedo, maximum of 7.3 sec for a central chord
53.1 km assuming a 30% albedo, maximum of 3.0 sec for a central chord
Cross-track diameter of 118.2 km used for deployment plan.
Star training set for 1867_Deiphobus, (2026/09/07 08:43UT) Object RA Dec mag sep mel Pollux 07:46:56.7 +27:57:34 1.1 25.02 4 Alnath 05:27:58.9 +28:37:39 1.6 8.97 33 31Ups Aur 05:52:51.8 +37:18:38 6.3 1.69 29 PPM 070971 05:55:24.6 +36:08:03 8.2 0.53 28 PPM 070988 05:56:10.9 +35:39:17 9.9 0.37 28 PPM 070962 05:55:03.5 +35:56:54 10.8 0.33 28 1867_Deiphobus 05:54:22.7 +35:38:56 14.1 28 Positions are for equinox of date
Star training set for 1867_Deiphobus, (2026/09/07 08:43UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 25.02 4 Alnath 05:26:17.6 +28:36:22 1.6 8.97 33 31Ups Aur 05:51:02.6 +37:18:19 6.3 1.69 29 PPM 070971 05:53:36.5 +36:07:50 8.2 0.53 28 PPM 070988 05:54:23.3 +35:39:06 9.9 0.37 28 PPM 070962 05:53:15.6 +35:56:41 10.8 0.33 28 1867_Deiphobus 05:52:35.1 +35:38:41 14.1 28 Positions are for J2000