RECON: TNO occultation with 04TF282

Event between 04TF282 and star GA1020:00687560 with event index number of 1079199

Geocentric closest approach at 2022/01/09 15:56:04 UTC

J2000 position of star is 05:09:04.1 +13:07:26
Equinox of date position of star is 05:10:18.2 +13:09:01
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 49% illuminated.
TNO apparent brightness V=22.5

TNO is 41.8 AU from the Sun and 41.0 AU from the Earth.
The TNO is moving 20.7 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 202 seconds.
The 1-sigma cross-track error in the shadow position is 1873 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 16.8 sec chord
Diameter=141.6 km assuming a 30% albedo -- 6.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 04TF282, (2022/01/09 15:56UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:11.2 +16:33:07  0.8  8.69  51
Bellatrix      05:26:18.8 +06:22:04  1.6  7.84  63
18 Ori         05:17:17.6 +11:21:52  5.6  2.47  61
PPM 120667     05:11:25.0 +13:34:27  7.0  0.50  59
PPM 120661     05:11:09.8 +13:14:21  9.1  0.23  59
04TF282        05:10:18.5 +13:09:02 16.8        59
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 04TF282, (2022/01/09 15:56UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  8.69  51
Bellatrix      05:25:07.8 +06:20:58  1.6  7.84  63
18 Ori         05:16:04.1 +11:20:29  5.6  2.47  61
PPM 120667     05:10:10.3 +13:32:53  7.0  0.50  59
PPM 120661     05:09:55.3 +13:12:47  9.1  0.23  59
04TF282        05:09:04.1 +13:07:26 16.8        59
Positions are for J2000

Event circumstances last updated at 2021/12/03 01:43:55 UT

Marc W. Buie, Southwest Research Institute

RECON