RECON: TNO occultation with 33340

Event between (33340) 98VG44 and star GA1080:03076063 with event index number of 2196503

Geocentric closest approach at 2027/03/15 00:02:04 UTC

J2000 position of star is 08:23:42.3 +19:11:09
Equinox of date position of star is 08:25:05.3 +19:06:25
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 49 degrees from the moon. Moon is 42% illuminated.
Apparent brightness V=21.4

Object is 30.3 AU from the Sun and 29.7 AU from the Earth.
Apparent velocity is 13.6 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is 1161 km.

The object has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 22.7 sec chord
Diameter=123.3 km assuming a 30% albedo -- 9.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 33340, (2027/03/15 00:07UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:58.9 +27:57:30  1.1 12.46  38
20 Cnc         08:24:55.1 +18:14:35  5.9  0.86  49
PPM 125249     08:27:24.1 +19:30:53  8.5  0.65  49
PPM 125237     08:26:23.5 +19:04:50  9.7  0.27  49
33340          08:25:16.1 +19:05:48 16.8        49
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 33340, (2027/03/15 00:07UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.46  38
20 Cnc         08:23:21.7 +18:19:55  5.9  0.86  49
PPM 125249     08:25:50.1 +19:36:18  8.5  0.65  49
PPM 125237     08:24:49.7 +19:10:13  9.7  0.27  49
33340          08:23:42.3 +19:11:09 16.8        49
Positions are for J2000

Event circumstances last updated at 2024/01/30 03:26:10 UT

Marc W. Buie, Southwest Research Institute

RECON