RECON observing guide for 12238_Actor_20260226070744

Occultation event with (12238) Actor, event index number 3316
Regions able to see the event: SAmericaN

Geocentric closest approach at 2026/02/26 07:07:44 UTC

J2000 position of star is 12:14:29.3 -20:06:29
Equinox of date position of star is 12:15:50.6 -20:15:12
Star is 101 degrees from the moon. Moon is 70% illuminated.
Stellar brightness G=8.5, apparent brightess of occulting body is G=16.4
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 88.0 per integration for unocculted signal
Expected flux drop is 100% with SNR of 87.9 for the occulted depth (per occulted point)

Apparent velocity is 13.4 km/sec on the sky relative to the star, or, 13.9 arcsec/hr.
Position angle of asteroid motion is 108.4 degrees
The recommended exposure time corresponds to 1.6 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 36.9 km.
The sky-plane scale is 3480.6 km/arcsec.

Diameter estimates:
39.3 km assuming a 5% albedo, maximum of 2.9 sec for a central chord
16.0 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 30.3 km used for deployment plan.

Star training set for 12238_Actor, (2026/02/26 07:08UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:34.5 -11:17:49  1.0 19.21 113
4Gam Crv       12:17:09.3 -17:41:13  2.6  2.58 100
PPM 260055     12:16:20.9 -20:59:22  5.7  0.75 102
PPM 260026     12:15:05.9 -20:28:20  7.9  0.28 101
PPM 260041     12:15:50.6 -20:15:12  8.6  0.00 101
12238_Actor    12:15:50.6 -20:15:12 16.4       102
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 12238_Actor, (2026/02/26 07:08UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 19.21 113
4Gam Crv       12:15:48.1 -17:32:30  2.6  2.58 100
PPM 260055     12:14:59.6 -20:50:39  5.7  0.75 102
PPM 260026     12:13:44.6 -20:19:36  7.9  0.28 101
PPM 260041     12:14:29.3 -20:06:29  8.6  0.00 101
12238_Actor    12:14:29.3 -20:06:29 16.4       101
Positions are for J2000


Created by recondetail.pro, 2025/06/18 22:53:27 MT