RECON observing guide for 2920_Automedon_20260729220926

Occultation event with (2920) Automedon, event index number 3905
Regions able to see the event: SAmericaS

Geocentric closest approach at 2026/07/29 22:09:26 UTC

J2000 position of star is 11:59:14.1 -12:47:09
Equinox of date position of star is 12:00:35.9 -12:56:02
Star is 124 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 17% with SNR of 0.5 for the occulted depth (per occulted point)

Apparent velocity is 29.1 km/sec on the sky relative to the star, or, 25.7 arcsec/hr.
Position angle of asteroid motion is 97.2 degrees
The recommended exposure time corresponds to 30.6 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 40.6 km.
The sky-plane scale is 4084.7 km/arcsec.

Diameter estimates:
102.3 km assuming a 5% albedo, maximum of 3.5 sec for a central chord
41.8 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 88.6 km used for deployment plan.

Star training set for 2920_Automedon, (2026/07/29 22:09UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:35.8 -11:17:57  1.0 21.08 106
4Gam Crv       12:17:10.6 -17:41:22  2.6  6.21 118
PPM 225013     11:52:42.9 -12:20:07  6.3  2.01 126
PPM 225246     12:02:09.1 -12:18:21  8.2  0.73 124
PPM 225220     12:01:06.0 -12:54:58  9.5  0.12 124
2920_Automedon 12:00:35.9 -12:56:02 14.6       124
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 2920_Automedon, (2026/07/29 22:09UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 21.08 106
4Gam Crv       12:15:48.1 -17:32:30  2.6  6.21 118
PPM 225013     11:51:21.5 -12:11:15  6.3  2.01 126
PPM 225246     12:00:47.3 -12:09:28  8.2  0.73 124
PPM 225220     11:59:44.2 -12:46:06  9.5  0.12 124
2920_Automedon 11:59:14.1 -12:47:09 14.6       124
Positions are for J2000


Created by recondetail.pro, 2025/06/19 18:27:48 MT