RECON: TNO occultation with 15VU207

Event between 15VU207 and star GA0700:00289001 with event index number of 2749270

Geocentric closest approach at 2024/08/10 00:36:56 UTC

J2000 position of star is 03:35:55.8 -19:19:30
Equinox of date position of star is 03:37:00.1 -19:14:50
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 134 degrees from the moon. Moon is 26% illuminated.
Apparent brightness V=22.2

Object is 30.5 AU from the Sun and 30.4 AU from the Earth.
Apparent velocity is 17.1 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 78 seconds.
The 1-sigma cross-track error in the shadow position is 1344 km.

The object has an absolute magnitude Hv=7.2
Diameter=222.9 km assuming a 5% albedo -- 13.1 sec chord
Diameter=91.0 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 15VU207, (2024/08/10 00:37UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:43.3 -08:10:30  0.1 26.35 117
Menkar         03:03:34.1 +04:11:05  2.5 24.83 152
PPM 213230     03:41:18.5 -19:30:52  6.3  1.04 133
PPM 213142     03:37:31.3 -19:17:48  7.6  0.13 134
15VU207        03:37:02.1 -19:14:41 15.4       134
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 15VU207, (2024/08/10 00:37UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 26.35 117
Menkar         03:02:16.8 +04:05:21  2.5 24.83 152
PPM 213230     03:40:12.4 -19:35:34  6.3  1.04 133
PPM 213142     03:36:25.0 -19:22:36  7.6  0.13 134
15VU207        03:35:55.8 -19:19:30 15.4       134
Positions are for J2000

Event circumstances last updated at 2023/11/08 05:26:05 UT

Marc W. Buie, Southwest Research Institute

RECON