RECON observing guide for 15535_00AT177_20250508175523

Occultation event with (15535) 00AT177, event index number 957
Regions able to see the event: UAE

Geocentric closest approach at 2025/05/08 17:55:23 UTC

J2000 position of star is 10:32:02.6 +12:15:00
Equinox of date position of star is 10:33:23.2 +12:07:08
Star is 30 degrees from the moon. Moon is 87% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=16.0
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 8.7 per integration for unocculted signal
Expected flux drop is 55% with SNR of 4.8 for the occulted depth (per occulted point)

Apparent velocity is 4.4 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The recommended exposure time corresponds to 8.9 km per image.
The 1-sigma error in the time of the event is 11.6 seconds.
The 1-sigma cross-track error in the shadow position is 14.3 km.
The sky-plane scale is 3338.7 km/arcsec.

Diameter estimates:
44.3 km assuming a 5% albedo, aximum of 10.0 sec for a central chord
18.1 km assuming a 30% albedo, maximum of 4.1 sec for a central chord
Cross-track diameter of 44.3 km used for deployment plan.

Star training set for 15535_00AT177, (2025/05/08 17:55UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.2 +11:50:32  1.3  5.79  36
46 Leo         10:33:32.8 +14:00:23  5.5  1.89  31
PPM 127517     10:35:27.9 +12:14:35  8.0  0.52  30
PPM 127492     10:33:54.4 +12:35:57  8.7  0.50  31
PPM 127498     10:34:25.9 +11:52:28 10.4  0.35  30
15535_00AT177  10:33:23.2 +12:07:08 16.0        30
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 15535_00AT177, (2025/05/08 17:55UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  5.79  36
46 Leo         10:32:11.7 +14:08:15  5.5  1.89  31
PPM 127517     10:34:07.2 +12:22:28  8.0  0.52  30
PPM 127492     10:32:33.6 +12:43:49  8.7  0.50  31
PPM 127498     10:33:05.3 +12:00:21 10.4  0.35  30
15535_00AT177  10:32:02.6 +12:15:00 16.0        30
Positions are for J2000


Created by recondetail.pro, 2025/03/14 11:03:46 MT