RECON: TNO occultation with 418993

Event between (418993) 09MS9 and star GA0760:00294387 with event index number of 2217340

Geocentric closest approach at 2023/01/28 13:47:02 UTC

J2000 position of star is 03:50:24.3 -13:21:25
Equinox of date position of star is 03:51:28.8 -13:17:19
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 35 degrees from the moon. Moon is 49% illuminated.
Apparent brightness V=23.0

Object is 20.4 AU from the Sun and 20.2 AU from the Earth.
Apparent velocity is 10.6 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 98 seconds.
The 1-sigma cross-track error in the shadow position is 860 km.

The object has an absolute magnitude Hv=9.7
Diameter=67.9 km assuming a 5% albedo -- 6.4 sec chord
Diameter=27.7 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 418993, (2023/01/28 13:48UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:38.9 -08:10:36  0.1 21.28  48
67Bet Eri      05:08:59.1 -05:03:30  2.8 20.80  46
PPM 213613     03:57:32.2 -13:31:55  6.5  1.49  36
PPM 213429     03:50:06.3 -13:04:06  8.3  0.40  35
PPM 213435     03:50:17.4 -13:20:59 10.0  0.30  35
418993         03:51:29.1 -13:17:18 16.4        35
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 418993, (2023/01/28 13:48UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 21.28  48
67Bet Eri      05:07:50.8 -05:05:13  2.8 20.80  46
PPM 213613     03:56:27.7 -13:35:51  6.5  1.49  36
PPM 213429     03:49:01.3 -13:08:16  8.3  0.40  35
PPM 213435     03:49:12.6 -13:25:08 10.0  0.30  35
418993         03:50:24.3 -13:21:25 16.4        35
Positions are for J2000

Event circumstances last updated at 2022/12/24 03:40:04 UT

Marc W. Buie, Southwest Research Institute

RECON