RECON: TNO occultation with 5145

Event between (5145) Pholus and star GA0760:12827906 with event index number of 1225536

Geocentric closest approach at 2022/07/29 14:16:54 UTC

J2000 position of star is 18:18:41.4 -12:35:35
Equinox of date position of star is 18:19:56.3 -12:34:58
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 136 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.9

TNO is 29.4 AU from the Sun and 28.6 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 109 seconds.
The 1-sigma cross-track error in the shadow position is 1401 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.5 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 5145, (2022/07/29 14:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.7 -26:28:49  0.9 29.13 114
Nunki          18:56:39.8 -26:16:00  2.0 16.18 147
PPM 234462     18:24:28.0 -12:00:07  6.3  1.24 137
PPM 234342     18:20:06.8 -12:26:36  8.3  0.14 136
5145           18:19:57.5 -12:34:57 15.9       136
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 5145, (2022/07/29 14:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.13 114
Nunki          18:55:15.9 -26:17:49  2.0 16.18 147
PPM 234462     18:23:12.2 -12:00:54  6.3  1.24 137
PPM 234342     18:18:50.7 -12:27:14  8.3  0.14 136
5145           18:18:41.4 -12:35:35 15.9       136
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:08:14 UT

Marc W. Buie, Southwest Research Institute

RECON