RECON: TNO occultation with 341275

Event between (341275) 07RG283 and star GA1080:03257454 with event index number of 2718377

Geocentric closest approach at 2027/04/22 01:15:05 UTC

J2000 position of star is 08:35:56.7 +19:40:10
Equinox of date position of star is 08:37:19.9 +19:35:04
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=20.7

Object is 15.6 AU from the Sun and 15.5 AU from the Earth.
Apparent velocity is 6.2 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 218 seconds.
The 1-sigma cross-track error in the shadow position is 1404 km.

The object has an absolute magnitude Hv=8.4
Diameter=118.6 km assuming a 5% albedo -- 20.3 sec chord
Diameter=48.4 km assuming a 30% albedo -- 8.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 341275, (2027/04/22 01:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:59.2 +27:57:29  1.1 14.26 113
33Eta Cnc      08:34:17.0 +20:20:47  5.3  1.08 100
PPM 125453     08:37:19.2 +19:40:31  7.7  0.11  99
341275         08:37:30.7 +19:34:25 14.6        99
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 341275, (2027/04/22 01:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 14.26 113
33Eta Cnc      08:32:42.4 +20:26:27  5.3  1.08 100
PPM 125453     08:35:45.1 +19:46:16  7.7  0.11  99
341275         08:35:56.7 +19:40:10 14.6        99
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:10:43 UT

Marc W. Buie, Southwest Research Institute

RECON