RECON observing guide for 13385_98XO79_20250504041914

Occultation event with (13385) 98XO79, event index number 1191
Regions able to see the event: NMexico

Geocentric closest approach at 2025/05/04 04:19:14 UTC

J2000 position of star is 09:10:03.3 +13:30:17
Equinox of date position of star is 09:11:26.7 +13:24:02
Star is 9 degrees from the moon. Moon is 46% illuminated.
Stellar brightness G=17.0, apparent brightess of occulting body is G=16.8
Use an exposure time of 1.70 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 46% with SNR of 1.4 for the occulted depth (per occulted point)

Apparent velocity is 11.2 km/sec on the sky relative to the star, or, 10.4 arcsec/hr.
The recommended exposure time corresponds to 19.0 km per image.
The 1-sigma error in the time of the event is 5.9 seconds.
The 1-sigma cross-track error in the shadow position is 10.9 km.
The sky-plane scale is 3870.8 km/arcsec.

Diameter estimates:
38.7 km assuming a 5% albedo, aximum of 3.5 sec for a central chord
15.8 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 38.7 km used for deployment plan.

Star training set for 13385_98XO79, (2025/05/04 04:19UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.1 +11:50:33  1.3 14.30  21
PPM 126297     09:19:13.6 +11:23:37  6.4  2.76  12
PPM 126138     09:09:30.1 +13:56:20  8.4  0.72   9
PPM 126155     09:10:54.4 +13:15:10  8.6  0.20   9
13385_98XO79   09:11:26.7 +13:24:02 16.8        10
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 13385_98XO79, (2025/05/04 04:19UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 14.30  21
PPM 126297     09:17:51.3 +11:30:04  6.4  2.76  12
PPM 126138     09:08:06.4 +14:02:32  8.4  0.72   9
PPM 126155     09:09:31.1 +13:21:25  8.6  0.20   9
13385_98XO79   09:10:03.3 +13:30:17 16.8         9
Positions are for J2000


Created by recondetail.pro, 2025/03/13 09:22:37 MT