RECON: TNO occultation with 612158

Event between (612158) 00FV53 and star GA0800:06143318 with event index number of 2807299

Geocentric closest approach at 2028/08/15 10:53:46 UTC

J2000 position of star is 17:15:38.6 -08:53:14
Equinox of date position of star is 17:16:52.1 -08:54:39
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 163 degrees from the moon. Moon is 30% illuminated.
TNO apparent brightness V=23.7

TNO is 35.5 AU from the Sun and 35.1 AU from the Earth.
The TNO is moving 9.3 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 1772 seconds.
The 1-sigma cross-track error in the shadow position is 4925 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=147.2 km assuming a 5% albedo -- 15.8 sec chord
Diameter=60.1 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 612158, (2028/08/15 10:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:10.0 -26:29:34  0.9 20.68 173
35Eta Oph      17:12:01.3 -15:45:30  2.6  6.96 170
PPM 232685     17:11:23.0 -10:33:29  5.6  2.18 165
PPM 200463     17:15:41.5 -08:26:04  8.5  0.61 162
PPM 200488     17:17:07.3 -08:59:23  9.6  0.08 163
612158         17:17:12.5 -08:55:02 15.9       163
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 612158, (2028/08/15 10:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.68 173
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.96 170
PPM 232685     17:09:48.0 -10:31:26  5.6  2.18 165
PPM 200463     17:14:07.9 -08:24:12  8.5  0.61 162
PPM 200488     17:15:33.3 -08:57:35  9.6  0.08 163
612158         17:15:38.6 -08:53:14 15.9       163
Positions are for J2000

Event circumstances last updated at 2022/05/28 23:01:15 UT

Marc W. Buie, Southwest Research Institute

RECON