RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1140:02063829 with event index number of 2298669

Geocentric closest approach at 2025/03/23 18:56:22 UTC

J2000 position of star is 06:16:52.6 +25:49:46
Equinox of date position of star is 06:18:23.6 +25:49:08
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 165 degrees from the moon. Moon is 37% illuminated.
Apparent brightness V=22.7

Object is 19.8 AU from the Sun and 19.8 AU from the Earth.
Apparent velocity is 6.6 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 829 seconds.
The 1-sigma cross-track error in the shadow position is 4795 km.

The object has an absolute magnitude Hv=9.4
Diameter=75.9 km assuming a 5% albedo -- 12.0 sec chord
Diameter=31.0 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 248835, (2025/03/23 18:56UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:32.3 +07:24:35  0.4 19.13 151
Alhena         06:39:10.1 +16:22:32  1.9 10.61 165
PPM 095919     06:26:17.0 +25:01:59  6.3  1.94 166
PPM 095750     06:20:17.3 +25:20:10  8.0  0.64 165
PPM 095702     06:18:28.7 +25:29:06  9.0  0.33 165
PPM 095698     06:18:10.7 +25:43:13 11.2  0.11 165
248835         06:18:26.4 +25:49:07 16.9       165
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 248835, (2025/03/23 18:56UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 19.13 151
Alhena         06:37:42.8 +16:23:57  1.9 10.61 165
PPM 095919     06:24:43.7 +25:02:55  6.3  1.94 166
PPM 095750     06:18:43.8 +25:20:53  8.0  0.64 165
PPM 095702     06:16:55.1 +25:29:45  9.0  0.33 165
PPM 095698     06:16:36.9 +25:43:52 11.2  0.11 165
248835         06:16:52.6 +25:49:46 16.9       165
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:44:17 UT

Marc W. Buie, Southwest Research Institute

RECON