RECON observing guide for 1208_Troilus_20250726171408

Occultation event with (1208) Troilus, event index number 1170
Regions able to see the event: Australia

Geocentric closest approach at 2025/07/26 17:14:08 UTC

J2000 position of star is 03:31:52.0 +15:48:57
Equinox of date position of star is 03:33:18.4 +15:54:05
Star is 94 degrees from the moon. Moon is 4% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 15% with SNR of 0.5 for the occulted depth (per occulted point)

Apparent velocity is 22.1 km/sec on the sky relative to the star, or, 21.0 arcsec/hr.
The recommended exposure time corresponds to 28.8 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 40.7 km.
The sky-plane scale is 3793.9 km/arcsec.

Diameter estimates:
92.9 km assuming a 5% albedo, aximum of 4.2 sec for a central chord
37.9 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 92.9 km used for deployment plan.

Star training set for 1208_Troilus, (2025/07/26 17:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.4 +16:33:31  0.8 15.39  78
Menkar         03:03:37.1 +04:11:19  2.5 13.80 104
PPM 119236     03:39:14.2 +15:30:45  6.4  1.48  92
PPM 119118     03:30:46.2 +16:17:05  8.5  0.72  94
PPM 119164     03:34:20.0 +15:38:06  8.6  0.36  93
1208_Troilus   03:33:18.4 +15:54:05 14.6        93
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 1208_Troilus, (2025/07/26 17:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 15.39  78
Menkar         03:02:16.8 +04:05:21  2.5 13.80 104
PPM 119236     03:37:47.9 +15:25:49  6.4  1.48  92
PPM 119118     03:29:19.6 +16:11:53  8.5  0.72  94
PPM 119164     03:32:53.7 +15:33:01  8.6  0.36  93
1208_Troilus   03:31:52.0 +15:48:57 14.6        94
Positions are for J2000


Created by recondetail.pro, 2025/03/01 08:59:34 MT