RECON: TNO occultation with 15BL518

Event between 15BL518 and star GA0640:06170880 with event index number of 2639080

Geocentric closest approach at 2024/01/02 10:25:36 UTC

J2000 position of star is 13:22:21.1 -24:19:13
Equinox of date position of star is 13:23:38.0 -24:26:31
Stellar brightness G=14.3, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 39 degrees from the moon. Moon is 66% illuminated.
Apparent brightness V=22.2

Object is 34.0 AU from the Sun and 34.3 AU from the Earth.
Apparent velocity is 16.5 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 126 seconds.
The 1-sigma cross-track error in the shadow position is 2032 km.

The object has an absolute magnitude Hv=6.7
Diameter=265.5 km assuming a 5% albedo -- 16.4 sec chord
Diameter=108.4 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 15BL518, (2024/01/02 10:29UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:27.7 -11:17:09  1.0 13.18  31
9Bet Crv       12:35:39.2 -23:31:45  2.6 11.00  32
46Gam Hya      13:20:13.9 -23:17:51  3.0  1.39  37
PPM 261519     13:21:37.4 -24:38:08  8.5  0.50  39
15BL518        13:23:40.1 -24:26:43 14.3        39
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 15BL518, (2024/01/02 10:29UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 13.18  31
9Bet Crv       12:34:23.2 -23:23:50  2.6 11.00  32
46Gam Hya      13:18:55.4 -23:10:19  3.0  1.39  37
PPM 261519     13:20:18.5 -24:30:37  8.5  0.50  39
15BL518        13:22:21.1 -24:19:13 14.3        39
Positions are for J2000

Event circumstances last updated at 2023/05/15 19:16:11 UT

Marc W. Buie, Southwest Research Institute

RECON