RECON: TNO occultation with 535019

Event between (535019) 14WE509 and star GA1000:03593347 with event index number of 2345543

Geocentric closest approach at 2027/05/27 00:03:42 UTC

J2000 position of star is 12:21:33.3 +10:35:07
Equinox of date position of star is 12:22:44.6 +10:27:21
Stellar brightness G=14.4, 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 65% illuminated.
Apparent brightness V=22.7

Object is 34.2 AU from the Sun and 33.8 AU from the Earth.
Apparent velocity is 9.1 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 408 seconds.
The 1-sigma cross-track error in the shadow position is 2515 km.

The object has an absolute magnitude Hv=7.2
Diameter=211.8 km assuming a 5% albedo -- 23.6 sec chord
Diameter=86.5 km assuming a 30% albedo -- 9.6 sec chord
Dynamical classification is 4:3E
 
 
 
 
 
 
 
 

Star training set for 535019, (2027/05/27 00:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:38.4 -11:18:12  1.0 26.89 114
Denebola       11:50:27.5 +14:25:08  2.1  8.88 144
12 Vir         12:14:49.7 +10:06:36  5.8  2.02 138
PPM 128880     12:14:53.4 +09:53:15  8.2  2.06 138
PPM 128967     12:21:18.4 +10:19:56  8.7  0.42 136
PPM 128998     12:23:58.4 +10:45:13 10.3  0.41 136
535019         12:22:56.9 +10:26:01 14.4       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 535019, (2027/05/27 00:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 26.89 114
Denebola       11:49:02.8 +14:34:17  2.1  8.88 144
12 Vir         12:13:25.8 +10:15:44  5.8  2.02 138
PPM 128880     12:13:29.6 +10:02:23  8.2  2.06 138
PPM 128967     12:19:54.7 +10:29:02  8.7  0.42 136
PPM 128998     12:22:34.9 +10:54:19 10.3  0.41 136
535019         12:21:33.3 +10:35:07 14.4       136
Positions are for J2000

Event circumstances last updated at 2023/05/16 02:56:48 UT

Marc W. Buie, Southwest Research Institute

RECON