RECON: TNO occultation with 523751

Event between (523751) 14UU224 and star GA0980:01105712 with event index number of 2363110

Geocentric closest approach at 2027/04/01 19:25:11 UTC

J2000 position of star is 05:54:48.1 +08:39:56
Equinox of date position of star is 05:56:06.9 +08:40:06
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 135 degrees from the moon. Moon is 25% illuminated.
Apparent brightness V=22.2

Object is 30.9 AU from the Sun and 31.1 AU from the Earth.
Apparent velocity is 14.3 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 1560 km.

The object has an absolute magnitude Hv=7.1
Diameter=228.0 km assuming a 5% albedo -- 16.0 sec chord
Diameter=93.1 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523751, (2027/04/01 19:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.9 +07:24:35  0.4  1.26 134
Bellatrix      05:26:35.6 +06:22:19  1.6  7.71 127
PPM 149523     05:51:32.8 +09:52:37  6.4  1.68 134
PPM 149634     05:56:11.3 +09:16:10  8.5  0.60 135
PPM 149621     05:55:48.9 +08:23:27  9.1  0.30 134
PPM 149629     05:56:01.8 +08:45:52 10.3  0.12 135
523751         05:56:17.5 +08:40:07 16.0       135
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 523751, (2027/04/01 19:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  1.26 134
Bellatrix      05:25:07.8 +06:20:58  1.6  7.71 127
PPM 149523     05:50:02.7 +09:52:15  6.4  1.68 134
PPM 149634     05:54:41.6 +09:15:59  8.5  0.60 135
PPM 149621     05:54:19.8 +08:23:15  9.1  0.30 134
PPM 149629     05:54:32.4 +08:45:41 10.3  0.12 135
523751         05:54:48.1 +08:39:56 16.0       135
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:34:49 UT

Marc W. Buie, Southwest Research Institute

RECON