RECON: TNO occultation with 341520

Event between (341520) Mors-Somnus and star GA1020:00540018 with event index number of 2718458

Geocentric closest approach at 2029/03/05 22:02:57 UTC

J2000 position of star is 04:38:41.7 +12:45:35
Equinox of date position of star is 04:40:02.9 +12:48:22
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 162 degrees from the moon. Moon is 65% illuminated.
Apparent brightness V=21.7

Object is 29.7 AU from the Sun and 29.8 AU from the Earth.
Apparent velocity is 9.3 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 200 seconds.
The 1-sigma cross-track error in the shadow position is 1707 km.

The object has an absolute magnitude Hv=6.8
Diameter=257.0 km assuming a 5% albedo -- 28.3 sec chord
Diameter=104.9 km assuming a 30% albedo -- 11.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 341520, (2029/03/05 22:11UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:35.9 +16:33:57  0.8  3.81 165
Bellatrix      05:26:41.9 +06:22:25  1.6 13.11 149
90 Tau         04:39:47.5 +12:34:01  4.3  0.28 162
PPM 120109     04:40:46.8 +13:03:29  7.5  0.27 162
PPM 120107     04:40:44.5 +12:34:51  9.0  0.26 162
341520         04:40:19.7 +12:48:56 16.6       162
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 341520, (2029/03/05 22:11UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  3.81 165
Bellatrix      05:25:07.8 +06:20:58  1.6 13.11 149
90 Tau         04:38:09.6 +12:30:39  4.3  0.28 162
PPM 120109     04:39:08.6 +13:00:09  7.5  0.27 162
PPM 120107     04:39:06.6 +12:31:31  9.0  0.26 162
341520         04:38:41.7 +12:45:35 16.6       162
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:05:14 UT

Marc W. Buie, Southwest Research Institute

RECON