RECON: TNO occultation with 463368

Event between (463368) 12VU85 and star GA1020:02496923 with event index number of 2279167

Geocentric closest approach at 2025/01/26 15:24:13 UTC

J2000 position of star is 06:59:38.7 +13:58:36
Equinox of date position of star is 07:01:01.7 +13:56:29
Stellar brightness G=8.8, use SENSEUP=2 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 161 degrees from the moon. Moon is 10% illuminated.
Apparent brightness V=20.8

Object is 22.1 AU from the Sun and 21.2 AU from the Earth.
Apparent velocity is 21.4 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 427 seconds.
The 1-sigma cross-track error in the shadow position is 3205 km.

The object has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 9.8 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 463368, (2025/01/26 15:24UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:31.8 +07:24:35  0.4 17.14 159
Alhena         06:39:09.6 +16:22:33  1.9  5.82 166
38 Gem         06:56:03.4 +13:08:38  5.0  1.45 161
PPM 123359     07:00:53.6 +14:17:25  8.2  0.35 161
PPM 123370     07:01:32.8 +13:51:17  9.7  0.15 160
463368         07:01:03.8 +13:56:26  8.8       160
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.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 463368, (2025/01/26 15:24UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.14 159
Alhena         06:37:42.8 +16:23:57  1.9  5.82 166
38 Gem         06:54:38.7 +13:10:38  5.0  1.45 161
PPM 123359     06:59:28.2 +14:19:35  8.2  0.35 161
PPM 123370     07:00:07.7 +13:53:29  9.7  0.15 160
463368         06:59:38.7 +13:58:36  8.8       161
Positions are for J2000

Event circumstances last updated at 2024/06/12 03:42:25 UT

Marc W. Buie, Southwest Research Institute

RECON