RECON observing guide for 3240_Laocoon_20250801051908

Occultation event with (3240) Laocoon, event index number 1179
Regions able to see the event: SAmericaN,Senegal

Geocentric closest approach at 2025/08/01 05:19:08 UTC

J2000 position of star is 02:42:39.3 +18:13:12
Equinox of date position of star is 02:44:05.3 +18:19:40
Star is 172 degrees from the moon. Moon is 47% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 6.5 per integration for unocculted signal
Expected flux drop is 58% with SNR of 3.8 for the occulted depth (per occulted point)

Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 15.1 arcsec/hr.
The recommended exposure time corresponds to 12.9 km per image.
The 1-sigma error in the time of the event is 2.3 seconds.
The 1-sigma cross-track error in the shadow position is 18.2 km.
The sky-plane scale is 3628.8 km/arcsec.

Diameter estimates:
52.5 km assuming a 5% albedo, aximum of 3.5 sec for a central chord
21.4 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 52.5 km used for deployment plan.

Star training set for 3240_Laocoon, (2025/08/01 05:19UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.5 +16:33:31  0.8 27.05 145
Hamal          02:08:37.3 +23:34:56  2.0  9.80 174
36 Ari         02:45:45.1 +17:52:15  6.4  0.60 172
PPM 118466     02:43:28.2 +17:51:53  8.3  0.49 172
PPM 118480     02:44:21.1 +18:00:42  9.7  0.32 172
PPM 118478     02:44:09.9 +18:17:54 10.1  0.03 172
3240_Laocoon   02:44:05.3 +18:19:40 15.8       172
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 3240_Laocoon, (2025/08/01 05:19UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 27.05 145
Hamal          02:07:10.8 +23:27:41  2.0  9.80 174
36 Ari         02:44:19.2 +17:45:49  6.4  0.60 172
PPM 118466     02:42:02.4 +17:45:24  8.3  0.49 172
PPM 118480     02:42:55.2 +17:54:15  9.7  0.32 172
PPM 118478     02:42:43.9 +18:11:26 10.1  0.03 172
3240_Laocoon   02:42:39.3 +18:13:12 15.8       172
Positions are for J2000


Created by recondetail.pro, 2025/03/01 09:10:54 MT