RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0660:35811945 with event index number of 2321144

Geocentric closest approach at 2023/05/08 18:57:07 UTC

J2000 position of star is 18:54:28.2 -23:03:32
Equinox of date position of star is 18:55:52.7 -23:01:40
Stellar brightness G=9.5, use SENSEUP=2 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 16 degrees from the moon. Moon is 89% illuminated.
Apparent brightness V=21.7

Object is 13.9 AU from the Sun and 13.3 AU from the Earth.
Apparent velocity is 8.4 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 250 seconds.
The 1-sigma cross-track error in the shadow position is 803 km.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 7.1 sec chord
Diameter=24.3 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 492338, (2023/05/08 18:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.6 -26:28:54  0.9 33.00  17
Nunki          18:56:42.7 -26:15:56  2.0  3.24  15
PPM 269095     18:57:25.4 -23:08:31  6.3  0.37  16
PPM 269061     18:55:52.9 -23:01:40  9.7  0.00  16
492338         18:55:52.9 -23:01:40  9.5        16
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 492338, (2023/05/08 18:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 33.00  17
Nunki          18:55:15.9 -26:17:49  2.0  3.24  15
PPM 269095     18:56:00.7 -23:10:25  6.3  0.37  16
PPM 269061     18:54:28.2 -23:03:32  9.7  0.00  16
492338         18:54:28.2 -23:03:32  9.5        16
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:34:00 UT

Marc W. Buie, Southwest Research Institute

RECON