RECON observing guide for 1437_Diomedes_20250523041743

Occultation event with (1437) Diomedes, event index number 995
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/05/23 04:17:43 UTC

J2000 position of star is 10:59:59.9 -11:14:25
Equinox of date position of star is 11:01:16.2 -11:22:37
Star is 158 degrees from the moon. Moon is 22% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=13.7
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 3.4 per integration for unocculted signal
Expected flux drop is 8% with SNR of 0.3 for the occulted depth (per occulted point)

Apparent velocity is 4.7 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The recommended exposure time corresponds to 9.4 km per image.
The 1-sigma error in the time of the event is 6.8 seconds.
The 1-sigma cross-track error in the shadow position is 27.9 km.
The sky-plane scale is 3511.6 km/arcsec.

Diameter estimates:
139.3 km assuming a 5% albedo, aximum of 29.6 sec for a central chord
56.9 km assuming a 30% albedo, maximum of 12.1 sec for a central chord
Cross-track diameter of 139.3 km used for deployment plan.

Star training set for 1437_Diomedes, (2025/05/23 04:18UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.3 +11:50:32  1.3 26.51 143
4Gam Crv       12:17:06.9 -17:40:58  2.6 19.39 166
PPM 223860     11:04:31.2 -11:26:29  5.3  0.80 159
PPM 223734     10:59:43.8 -11:33:20  8.5  0.42 157
PPM 223775     11:01:23.1 -11:11:23  9.4  0.19 158
1437_Diomedes  11:01:16.2 -11:22:37 13.7       158
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, (2025/05/23 04:18UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 26.51 143
4Gam Crv       12:15:48.1 -17:32:30  2.6 19.39 166
PPM 223860     11:03:14.7 -11:18:15  5.3  0.80 159
PPM 223734     10:58:27.6 -11:25:09  8.5  0.42 157
PPM 223775     11:00:06.7 -11:03:11  9.4  0.19 158
1437_Diomedes  10:59:59.9 -11:14:25 13.7       158
Positions are for J2000


Created by recondetail.pro, 2025/03/15 08:45:29 MT