RECON: TNO occultation with 523722

Event between (523722) 14LV28 and star GA0740:29125261 with event index number of 2293026

Geocentric closest approach at 2023/07/31 18:14:25 UTC

J2000 position of star is 21:21:56.9 -15:11:55
Equinox of date position of star is 21:23:14.6 -15:05:50
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 25 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=21.2

Object is 35.5 AU from the Sun and 34.5 AU from the Earth.
Apparent velocity is 23.0 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 61 seconds.
The 1-sigma cross-track error in the shadow position is 1297 km.

The object has an absolute magnitude Hv=5.7
Diameter=422.7 km assuming a 5% albedo -- 18.9 sec chord
Diameter=172.6 km assuming a 30% albedo -- 7.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 523722, (2023/07/31 18:15UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:56.9 -29:29:48  1.2 26.31  42
29 Cap         21:17:03.0 -15:04:20  5.1  1.50  24
PPM 238724     21:22:47.6 -15:03:18  8.1  0.12  25
PPM 238738     21:23:18.8 -15:03:28  9.4  0.04  25
523722         21:23:14.9 -15:05:49 15.8        25
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 523722, (2023/07/31 18:15UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 26.31  42
29 Cap         21:15:44.9 -15:10:17  5.1  1.50  24
PPM 238724     21:21:29.7 -15:09:23  8.1  0.12  25
PPM 238738     21:22:00.9 -15:09:33  9.4  0.04  25
523722         21:21:56.9 -15:11:55 15.8        25
Positions are for J2000

Event circumstances last updated at 2023/07/04 04:03:16 UT

Marc W. Buie, Southwest Research Institute

RECON