RECON observing guide for 34642_00WN2_20250617085310

Occultation event with (34642) 00WN2, event index number 1066
Regions able to see the event: SAmericaN,SAmericaS

Geocentric closest approach at 2025/06/17 08:53:10 UTC

J2000 position of star is 02:33:32.4 +10:22:03
Equinox of date position of star is 02:34:54.6 +10:28:42
Star is 61 degrees from the moon. Moon is 66% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=16.5
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 64% with SNR of 1.9 for the occulted depth (per occulted point)

Apparent velocity is 32.6 km/sec on the sky relative to the star, or, 28.4 arcsec/hr.
The recommended exposure time corresponds to 14.7 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 34.6 km.
The sky-plane scale is 4128.9 km/arcsec.

Diameter estimates:
41.1 km assuming a 5% albedo, aximum of 1.3 sec for a central chord
16.8 km assuming a 30% albedo, maximum of 0.5 sec for a central chord
Cross-track diameter of 41.1 km used for deployment plan.

Star training set for 34642_00WN2, (2025/06/17 08:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.1 +16:33:30  0.8 30.35  91
Menkar         03:03:36.8 +04:11:17  2.5  9.50  66
PPM 145637     02:30:57.1 +09:40:41  6.5  1.26  60
PPM 118344     02:35:48.7 +11:42:54  6.7  1.26  62
PPM 118313     02:33:37.2 +10:14:54  9.8  0.39  61
PPM 118326     02:34:27.1 +10:14:53 11.5  0.26  61
34642_00WN2    02:34:54.6 +10:28:42 16.5        61
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 34642_00WN2, (2025/06/17 08:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 30.35  91
Menkar         03:02:16.8 +04:05:21  2.5  9.50  66
PPM 145637     02:29:35.3 +09:33:57  6.5  1.26  60
PPM 118344     02:34:26.0 +11:36:17  6.7  1.26  62
PPM 118313     02:32:15.2 +10:08:13  9.8  0.39  61
PPM 118326     02:33:05.1 +10:08:14 11.5  0.26  61
34642_00WN2    02:33:32.4 +10:22:03 16.5        61
Positions are for J2000


Created by recondetail.pro, 2025/02/28 09:32:59 MT