RECON observing guide for 5244_Amphilochos_20250530094927

Occultation event with (5244) Amphilochos, event index number 1018
Regions able to see the event: Australia

Geocentric closest approach at 2025/05/30 09:49:27 UTC

J2000 position of star is 09:48:11.3 +07:58:31
Equinox of date position of star is 09:49:32.0 +07:51:23
Star is 34 degrees from the moon. Moon is 15% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=16.4
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 4.0 per integration for unocculted signal
Expected flux drop is 63% with SNR of 2.5 for the occulted depth (per occulted point)

Apparent velocity is 18.8 km/sec on the sky relative to the star, or, 17.1 arcsec/hr.
The recommended exposure time corresponds to 11.3 km per image.
The 1-sigma error in the time of the event is 3.1 seconds.
The 1-sigma cross-track error in the shadow position is 22.1 km.
The sky-plane scale is 3954.3 km/arcsec.

Diameter estimates:
45.9 km assuming a 5% albedo, aximum of 2.4 sec for a central chord
18.8 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 45.9 km used for deployment plan.

Star training set for 5244_Amphilochos, (2025/05/30 09:49UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.4 +11:50:31  1.3  6.37  36
PPM 156172     09:47:30.4 +06:35:25  5.8  1.36  34
PPM 156215     09:50:13.7 +08:10:57  7.6  0.37  34
5244_Amphiloch 09:49:32.0 +07:51:23 16.4        34
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 5244_Amphilochos, (2025/05/30 09:49UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  6.37  36
PPM 156172     09:46:10.1 +06:42:30  5.8  1.36  34
PPM 156215     09:48:52.9 +08:18:06  7.6  0.37  34
5244_Amphiloch 09:48:11.3 +07:58:31 16.4        34
Positions are for J2000


Created by recondetail.pro, 2025/03/15 09:10:15 MT