Occultation event with (1867) Deiphobus, event index number 1200
Regions able to see the event: SMexico
Geocentric closest approach at 2025/07/10 10:21:30 UTC
J2000 position of star is 02:58:25.0 +39:28:56
Equinox of date position of star is 03:00:03.3 +39:34:59
Star is 129 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=8.6, 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 86.3 per integration for unocculted signal
Expected flux drop is 99% with SNR of 85.8 for the occulted depth (per occulted point)
Apparent velocity is 29.6 km/sec on the sky relative to the star, or, 25.7 arcsec/hr.
The recommended exposure time corresponds to 3.5 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 17.7 km.
The sky-plane scale is 4141.3 km/arcsec.
Diameter estimates:
130.0 km assuming a 5% albedo, aximum of 4.4 sec for a central chord
53.1 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 130.0 km used for deployment plan.
Star training set for 1867_Deiphobus, (2025/07/10 10:21UT) Object RA Dec mag sep mel Aldebaran 04:37:23.3 +16:33:31 0.8 31.27 145 Algol 03:09:50.4 +41:03:08 2.1 2.37 131 22Pi Per 03:00:24.2 +39:45:47 4.7 0.19 129 PPM 067942 02:58:42.2 +39:09:59 8.5 0.49 129 PPM 067963 03:00:03.4 +39:34:59 8.7 0.00 129 1867_Deiphobus 03:00:03.3 +39:34:59 14.1 129 Positions are for equinox of date
Star training set for 1867_Deiphobus, (2025/07/10 10:21UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 31.27 145 Algol 03:08:10.1 +40:57:20 2.1 2.37 131 22Pi Per 02:58:45.7 +39:39:45 4.7 0.19 129 PPM 067942 02:57:04.3 +39:03:54 8.5 0.49 129 PPM 067963 02:58:25.0 +39:28:56 8.7 0.00 129 1867_Deiphobus 02:58:25.0 +39:28:56 14.1 129 Positions are for J2000