RECON: TNO occultation with 15874

Event between (15874) 96TL66 and star GA0940:00849957 with event index number of 1318569

Geocentric closest approach at 2024/01/11 00:02:20 UTC

J2000 position of star is 05:39:46.1 +04:45:37
Equinox of date position of star is 05:41:02.7 +04:46:18
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=21.4

Object is 39.4 AU from the Sun and 38.5 AU from the Earth.
Apparent velocity is 22.1 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 85 seconds.
The 1-sigma cross-track error in the shadow position is 1432 km.

The object has an absolute magnitude Hv=5.4
Diameter=487.5 km assuming a 5% albedo -- 22.3 sec chord
Diameter=199.0 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 15874, (2024/01/11 00:01UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:28.4 +07:24:34  0.4  4.65 154
Bellatrix      05:26:25.3 +06:22:10  1.6  3.97 149
PPM 149151     05:36:00.4 +05:40:31  6.4  1.55 150
PPM 149292     05:41:01.6 +04:26:46  7.8  0.33 150
PPM 149275     05:40:25.2 +04:42:05 10.8  0.17 150
15874          05:41:02.7 +04:46:18 17.0       150
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 15874, (2024/01/11 00:01UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  4.65 154
Bellatrix      05:25:07.8 +06:20:58  1.6  3.97 149
PPM 149151     05:34:43.3 +05:39:40  6.4  1.55 150
PPM 149292     05:39:45.2 +04:26:04  7.8  0.33 150
PPM 149275     05:39:08.7 +04:41:23 10.8  0.17 150
15874          05:39:46.1 +04:45:37 17.0       150
Positions are for J2000

Event circumstances last updated at 2024/01/08 05:06:23 UT

Marc W. Buie, Southwest Research Institute

RECON