RECON observing guide for 1437_Diomedes_20250716011029

Occultation event with (1437) Diomedes, event index number 1144
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/07/16 01:10:29 UTC

J2000 position of star is 11:20:32.5 -11:59:21
Equinox of date position of star is 11:21:49.8 -12:07:45
Star is 166 degrees from the moon. Moon is 72% illuminated.
Stellar brightness G=13.4, apparent brightess of occulting body is G=14.0
Use an exposure time of 0.17 seconds with the standard RECON-QHY system.
SNR of 9.7 per integration for unocculted signal
Expected flux drop is 63% with SNR of 6.1 for the occulted depth (per occulted point)

Apparent velocity is 26.2 km/sec on the sky relative to the star, or, 23.1 arcsec/hr.
The recommended exposure time corresponds to 4.5 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 32.2 km.
The sky-plane scale is 4089.5 km/arcsec.

Diameter estimates:
139.3 km assuming a 5% albedo, aximum of 5.3 sec for a central chord
56.9 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 139.3 km used for deployment plan.

Star training set for 1437_Diomedes, (2025/07/16 01:10UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.8 +11:50:29  1.3 29.91 152
4Gam Crv       12:17:07.4 -17:41:01  2.6 14.46 161
PPM 224159     11:16:56.8 -12:43:56  6.5  1.34 164
PPM 224237     11:20:10.4 -11:54:31  8.3  0.46 166
PPM 224290     11:22:12.2 -12:18:34  9.1  0.20 166
1437_Diomedes  11:21:49.8 -12:07:45 14.0       166
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 1437_Diomedes, (2025/07/16 01:10UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 29.91 152
4Gam Crv       12:15:48.1 -17:32:30  2.6 14.46 161
PPM 224159     11:15:39.8 -12:35:34  6.5  1.34 164
PPM 224237     11:18:53.1 -11:46:07  8.3  0.46 166
PPM 224290     11:20:54.9 -12:10:09  9.1  0.20 166
1437_Diomedes  11:20:32.5 -11:59:21 14.0       166
Positions are for J2000


Created by recondetail.pro, 2025/03/15 10:30:15 MT