RECON observing guide for 7815_Dolon_20250507202410

Occultation event with (7815) Dolon, event index number 954
Regions able to see the event: Australia

Geocentric closest approach at 2025/05/07 20:24:10 UTC

J2000 position of star is 01:00:38.3 -05:25:22
Equinox of date position of star is 01:01:55.4 -05:17:12
Star is 160 degrees from the moon. Moon is 80% illuminated.
Stellar brightness G=14.0, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.1 per integration for unocculted signal
Expected flux drop is 85% with SNR of 7.8 for the occulted depth (per occulted point)

Apparent velocity is 38.1 km/sec on the sky relative to the star, or, 33.1 arcsec/hr.
The recommended exposure time corresponds to 9.5 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 12.2 km.
The sky-plane scale is 4145.5 km/arcsec.

Diameter estimates:
52.5 km assuming a 5% albedo, aximum of 1.4 sec for a central chord
21.4 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 52.5 km used for deployment plan.

Star training set for 7815_Dolon, (2025/05/07 20:24UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:02.7 -29:29:15  1.2 37.77 151
Diphda         00:44:51.6 -17:50:52  2.0 13.24 158
25 Cet         01:04:19.5 -04:42:06  5.3  0.84 159
PPM 182889     01:00:02.8 -05:44:49  6.6  0.66 160
PPM 182929     01:02:17.4 -05:10:57  9.8  0.14 160
7815_Dolon     01:01:55.4 -05:17:12 15.9       160
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, (2025/05/07 20:24UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.7 -29:37:24  1.2 37.77 151
Diphda         00:43:35.8 -17:59:11  2.0 13.24 158
25 Cet         01:03:02.4 -04:50:15  5.3  0.84 159
PPM 182889     00:58:45.8 -05:53:00  6.6  0.66 160
PPM 182929     01:01:00.3 -05:19:06  9.8  0.14 160
7815_Dolon     01:00:38.3 -05:25:22 15.9       160
Positions are for J2000


Created by recondetail.pro, 2025/02/27 16:19:31 MT