RECON: TNO occultation with 120348

Event between (120348) 04TY364 and star GA0840:00328532 with event index number of 2141600

Geocentric closest approach at 2026/08/19 12:57:35 UTC

J2000 position of star is 03:59:10.0 -04:47:09
Equinox of date position of star is 04:00:21.6 -04:43:08
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 149 degrees from the moon. Moon is 45% illuminated.
Apparent brightness V=20.3

Object is 38.4 AU from the Sun and 38.4 AU from the Earth.
Apparent velocity is 13.0 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 113 seconds.
The 1-sigma cross-track error in the shadow position is 1672 km.

The object has an absolute magnitude Hv=4.3
Diameter=787.1 km assuming a 5% albedo -- 62.9 sec chord
Diameter=321.3 km assuming a 30% albedo -- 25.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 120348, (2026/08/19 12:57UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:49.1 -08:10:22  0.1 19.03 136
Menkar         03:03:40.5 +04:11:34  2.5 16.75 161
30 Eri         03:54:00.7 -05:17:01  5.6  1.71 150
PPM 186360     03:57:36.0 -05:04:38  8.3  0.81 149
PPM 186412     04:00:08.2 -04:29:56  9.7  0.23 150
120348         04:00:29.3 -04:42:42 15.5       149
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 120348, (2026/08/19 12:57UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 19.03 136
Menkar         03:02:16.8 +04:05:21  2.5 16.75 161
30 Eri         03:52:41.7 -05:21:41  5.6  1.71 150
PPM 186360     03:56:16.9 -05:09:11  8.3  0.81 149
PPM 186412     03:58:48.8 -04:34:24  9.7  0.23 150
120348         03:59:10.0 -04:47:09 15.5       149
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:29:34 UT

Marc W. Buie, Southwest Research Institute

RECON