RECON observing guide for 3564_Talthybius_20250604225758

Occultation event with (3564) Talthybius, event index number 1031
Regions able to see the event: SAmericaS

Geocentric closest approach at 2025/06/04 22:57:58 UTC

J2000 position of star is 08:44:11.1 +31:43:27
Equinox of date position of star is 08:45:45.1 +31:37:52
Star is 61 degrees from the moon. Moon is 67% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.3
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 25% with SNR of 0.8 for the occulted depth (per occulted point)

Apparent velocity is 31.7 km/sec on the sky relative to the star, or, 27.4 arcsec/hr.
The recommended exposure time corresponds to 31.7 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 25.8 km.
The sky-plane scale is 4176.6 km/arcsec.

Diameter estimates:
76.9 km assuming a 5% albedo, aximum of 2.4 sec for a central chord
31.4 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 76.9 km used for deployment plan.

Star training set for 3564_Talthybius, (2025/06/04 22:58UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:52.1 +27:57:46  1.1 13.28  72
PPM 073899     08:41:52.5 +31:51:00  6.5  0.85  62
PPM 073933     08:44:20.3 +31:46:10  7.5  0.33  61
PPM 073936     08:44:25.9 +31:37:41  9.5  0.28  61
3564_Talthybiu 08:45:45.1 +31:37:52 15.3        60
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 3564_Talthybius, (2025/06/04 22:58UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.8 +28:01:33  1.1 13.28  72
PPM 073899     08:40:18.2 +31:56:30  6.5  0.85  62
PPM 073933     08:42:46.2 +31:51:44  7.5  0.33  61
PPM 073936     08:42:51.9 +31:43:15  9.5  0.28  61
3564_Talthybiu 08:44:11.1 +31:43:27 15.3        61
Positions are for J2000


Created by recondetail.pro, 2025/03/15 09:19:00 MT