RECON observing guide for 7641_Cteatus_20250502141130

Occultation event with (7641) Cteatus, event index number 941
Regions able to see the event: Australia

Geocentric closest approach at 2025/05/02 14:11:30 UTC

J2000 position of star is 07:56:17.4 -13:54:40
Equinox of date position of star is 07:57:28.0 -13:58:48
Star is 42 degrees from the moon. Moon is 30% illuminated.
Stellar brightness G=14.9, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 52% with SNR of 5.2 for the occulted depth (per occulted point)

Apparent velocity is 20.8 km/sec on the sky relative to the star, or, 20.7 arcsec/hr.
The recommended exposure time corresponds to 17.7 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 25.0 km.
The sky-plane scale is 3603.0 km/arcsec.

Diameter estimates:
76.2 km assuming a 5% albedo, aximum of 3.7 sec for a central chord
31.1 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 76.2 km used for deployment plan.

Star training set for 7641_Cteatus, (2025/05/02 14:11UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:15.8 -16:45:09 -1.5 17.38  45
15Rho Pup      08:08:37.4 -24:22:43  2.8 10.73  53
9 Pup          07:52:56.7 -13:58:00  5.2  1.10  42
PPM 219476     08:00:13.3 -13:58:02  8.4  0.67  42
PPM 219429     07:58:18.7 -14:02:04  9.2  0.21  42
7641_Cteatus   07:57:28.0 -13:58:48 15.0        42
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 7641_Cteatus, (2025/05/02 14:11UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:07.9 -16:43:28 -1.5 17.38  45
15Rho Pup      08:07:32.5 -24:18:14  2.8 10.73  53
9 Pup          07:51:46.2 -13:54:01  5.2  1.10  42
PPM 219476     07:59:02.7 -13:53:49  8.4  0.67  42
PPM 219429     07:57:08.2 -13:57:54  9.2  0.21  42
7641_Cteatus   07:56:17.4 -13:54:40 15.0        42
Positions are for J2000


Created by recondetail.pro, 2025/03/14 10:53:17 MT