RECON observing guide for 1867_Deiphobus_20250801083248

Occultation event with (1867) Deiphobus, event index number 1181
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/08/01 08:32:48 UTC

J2000 position of star is 03:13:37.3 +41:10:44
Equinox of date position of star is 03:15:18.4 +41:16:23
Star is 153 degrees from the moon. Moon is 48% illuminated.
Stellar brightness G=10.0, 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 56.5 per integration for unocculted signal
Expected flux drop is 98% with SNR of 55.2 for the occulted depth (per occulted point)

Apparent velocity is 21.9 km/sec on the sky relative to the star, or, 20.0 arcsec/hr.
The recommended exposure time corresponds to 2.6 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 16.3 km.
The sky-plane scale is 3944.7 km/arcsec.

Diameter estimates:
129.4 km assuming a 5% albedo, aximum of 5.9 sec for a central chord
52.8 km assuming a 30% albedo, maximum of 2.4 sec for a central chord
Cross-track diameter of 129.4 km used for deployment plan.

Star training set for 1867_Deiphobus, (2025/08/01 08:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.5 +16:33:31  0.8 30.38 146
Algol          03:09:50.6 +41:03:08  2.1  1.05 154
PPM 045917     03:13:51.5 +42:28:14  5.9  1.23 152
PPM 045985     03:17:50.4 +41:57:11  8.5  0.83 153
PPM 045942     03:15:18.4 +41:16:23 10.0  0.00 153
1867_Deiphobus 03:15:18.4 +41:16:23 14.1       153
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Star training set for 1867_Deiphobus, (2025/08/01 08:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 30.38 146
Algol          03:08:10.1 +40:57:20  2.1  1.05 154
PPM 045917     03:12:09.5 +42:22:33  5.9  1.23 152
PPM 045985     03:16:08.5 +41:51:37  8.5  0.83 153
PPM 045942     03:13:37.3 +41:10:44 10.0  0.00 153
1867_Deiphobus 03:13:37.3 +41:10:44 14.1       153
Positions are for J2000


Created by recondetail.pro, 2025/03/15 10:42:47 MT