RECON observing guide for 7815_Dolon_20250612194130

Occultation event with (7815) Dolon, event index number 1052
Regions able to see the event: Australia

Geocentric closest approach at 2025/06/12 19:41:30 UTC

J2000 position of star is 01:29:10.7 -04:16:21
Equinox of date position of star is 01:30:28.0 -04:08:30
Star is 98 degrees from the moon. Moon is 98% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 44% with SNR of 1.4 for the occulted depth (per occulted point)

Apparent velocity is 28.2 km/sec on the sky relative to the star, or, 26.3 arcsec/hr.
The recommended exposure time corresponds to 18.3 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 6.9 km.
The sky-plane scale is 3854.5 km/arcsec.

Diameter estimates:
52.5 km assuming a 5% albedo, aximum of 1.9 sec for a central chord
21.4 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 52.5 km used for deployment plan.

Star training set for 7815_Dolon, (2025/06/12 19:42UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:03.1 -29:29:13  1.2 43.86  55
68Omi Cet      02:20:38.0 -02:51:48  2.0 12.58 110
PPM 183408     01:26:06.4 -02:43:01  6.1  1.79  98
PPM 183468     01:29:12.8 -03:26:33  8.1  0.77  98
PPM 183465     01:29:06.3 -04:20:14  9.2  0.39  98
7815_Dolon     01:30:28.0 -04:08:30 15.9        99
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 7815_Dolon, (2025/06/12 19:42UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.7 -29:37:24  1.2 43.86  55
68Omi Cet      02:19:20.8 -02:58:46  2.0 12.58 110
PPM 183408     01:24:48.7 -02:50:56  6.1  1.79  98
PPM 183468     01:27:55.4 -03:34:25  8.1  0.77  98
PPM 183465     01:27:49.0 -04:28:07  9.2  0.39  98
7815_Dolon     01:29:10.7 -04:16:21 15.9        98
Positions are for J2000


Created by recondetail.pro, 2025/02/28 09:15:02 MT