RECON observing guide for 13385_98XO79_20260402062415

Occultation event with (13385) 98XO79, event index number 3569
Regions able to see the event: SAmericaN

Geocentric closest approach at 2026/04/02 06:24:15 UTC

J2000 position of star is 11:16:13.4 +09:08:39
Equinox of date position of star is 11:17:35.2 +09:00:02
Star is 29 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=13.9, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 88% with SNR of 8.3 for the occulted depth (per occulted point)

Apparent velocity is 15.1 km/sec on the sky relative to the star, or, 16.5 arcsec/hr.
Position angle of asteroid motion is 121.1 degrees
The recommended exposure time corresponds to 3.8 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 30.1 km.
The sky-plane scale is 3283.7 km/arcsec.

Diameter estimates:
38.7 km assuming a 5% albedo, maximum of 2.6 sec for a central chord
15.8 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 36.1 km used for deployment plan.

Star training set for 13385_98XO79, (2026/04/02 06:24UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:46.0 +11:50:16  1.3 16.91  45
Denebola       11:50:23.8 +14:25:31  2.1  9.69  27
PPM 128238     11:26:20.5 +11:17:09  5.8  3.14  29
PPM 157726     11:20:28.6 +09:36:25  8.1  0.94  29
PPM 157689     11:17:49.0 +09:11:50 10.4  0.20  29
13385_98XO79   11:17:35.2 +09:00:02 16.1        29
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, (2026/04/02 06:24UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 16.91  45
Denebola       11:49:02.7 +14:34:16  2.1  9.69  27
PPM 128238     11:24:58.8 +11:25:49  5.8  3.14  29
PPM 157726     11:19:06.9 +09:45:03  8.1  0.94  29
PPM 157689     11:16:27.2 +09:20:27 10.4  0.20  29
13385_98XO79   11:16:13.4 +09:08:39 16.1        29
Positions are for J2000


Created by recondetail.pro, 2025/06/19 07:20:28 MT