RECON: TNO occultation with 84922

Event between (84922) 03VS2 and star GA1200:02415897 with event index number of 2405476

Geocentric closest approach at 2027/01/22 23:10:25 UTC

J2000 position of star is 06:16:52.4 +30:41:49
Equinox of date position of star is 06:18:25.9 +30:41:11
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 36 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=19.7

Object is 37.0 AU from the Sun and 36.1 AU from the Earth.
Apparent velocity is 21.9 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 163 seconds.
The 1-sigma cross-track error in the shadow position is 1557 km.

The object has an absolute magnitude Hv=4.0
Diameter=968.3 km assuming a 5% albedo -- 43.8 sec chord
Diameter=395.3 km assuming a 30% albedo -- 17.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 84922, (2027/01/22 23:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:58.3 +27:57:31  1.1 19.42  17
Alnath         05:28:00.3 +28:37:40  1.6 11.18  47
44Kap Aur      06:17:06.2 +29:29:09  4.3  1.24  36
PPM 071435     06:18:04.7 +30:05:28  7.0  0.61  36
PPM 071417     06:17:34.7 +30:46:25  8.7  0.24  36
PPM 071443     06:18:32.7 +30:47:21 10.1  0.11  36
84922          06:18:37.0 +30:41:07 16.4        36
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 84922, (2027/01/22 23:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 19.42  17
Alnath         05:26:17.6 +28:36:23  1.6 11.18  47
44Kap Aur      06:15:22.6 +29:29:47  4.3  1.24  36
PPM 071435     06:16:20.6 +30:06:09  7.0  0.61  36
PPM 071417     06:15:50.0 +30:47:05  8.7  0.24  36
PPM 071443     06:16:48.0 +30:48:03 10.1  0.11  36
84922          06:16:52.4 +30:41:49 16.4        36
Positions are for J2000

Event circumstances last updated at 2024/03/05 04:57:00 UT

Marc W. Buie, Southwest Research Institute

RECON