RECON observing guide for 22149_00WD49_20260406041750

Occultation event with (22149) 00WD49, event index number 3585
Regions able to see the event: SAmericaN

Geocentric closest approach at 2026/04/06 04:17:50 UTC

J2000 position of star is 11:27:32.6 -24:27:43
Equinox of date position of star is 11:28:51.2 -24:36:24
Star is 60 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 7.6 per integration for unocculted signal
Expected flux drop is 50% with SNR of 3.8 for the occulted depth (per occulted point)

Apparent velocity is 15.6 km/sec on the sky relative to the star, or, 19.1 arcsec/hr.
Position angle of asteroid motion is 119.5 degrees
The recommended exposure time corresponds to 11.7 km per image.
The 1-sigma error in the time of the event is 2.1 seconds.
The 1-sigma cross-track error in the shadow position is 16.5 km.
The sky-plane scale is 2944.5 km/arcsec.

Diameter estimates:
52.0 km assuming a 5% albedo, maximum of 3.3 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.

Star training set for 22149_00WD49, (2026/04/06 04:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:34.8 -11:17:51  1.0 30.90  39
4Gam Crv       12:17:09.6 -17:41:15  2.6 13.21  52
PPM 259120     11:33:41.8 -26:53:31  5.9  2.53  59
PPM 259015     11:28:39.6 -24:18:52  7.5  0.30  60
PPM 259017     11:28:41.3 -24:46:27 10.0  0.17  60
22149_00WD49   11:28:51.2 -24:36:24 15.1        60
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 22149_00WD49, (2026/04/06 04:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 30.90  39
4Gam Crv       12:15:48.1 -17:32:30  2.6 13.21  52
PPM 259120     11:32:23.1 -26:44:48  5.9  2.53  59
PPM 259015     11:27:21.0 -24:10:11  7.5  0.30  60
PPM 259017     11:27:22.7 -24:37:45 10.0  0.17  60
22149_00WD49   11:27:32.6 -24:27:43 15.1        60
Positions are for J2000


Created by recondetail.pro, 2025/06/19 08:50:02 MT