RECON: TNO occultation with 500886

Event between (500886) 13JN65 and star GA0680:08461686 with event index number of 2336540

Geocentric closest approach at 2028/02/14 09:52:25 UTC

J2000 position of star is 17:01:35.7 -21:03:09
Equinox of date position of star is 17:03:03.2 -21:05:11
Stellar brightness G=16.0, 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 80% illuminated.
Apparent brightness V=23.8

Object is 41.1 AU from the Sun and 41.5 AU from the Earth.
Apparent velocity is 15.8 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 422 seconds.
The 1-sigma cross-track error in the shadow position is 3949 km.

The object has an absolute magnitude Hv=7.5
Diameter=199.5 km assuming a 5% albedo -- 12.1 sec chord
Diameter=81.5 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 500886, (2028/02/14 09:52UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:08.2 -26:29:31  0.9  9.12  51
35Eta Oph      17:11:59.6 -15:45:28  2.6  5.72  61
PPM 266364     17:06:25.5 -20:31:54  6.5  0.93  59
PPM 266301     17:03:42.4 -20:38:02  7.7  0.47  59
PPM 266299     17:03:40.1 -21:20:00  9.0  0.26  59
500886         17:03:16.2 -21:05:29 16.0        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 500886, (2028/02/14 09:52UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.12  51
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.72  61
PPM 266364     17:04:45.3 -20:29:41  6.5  0.93  59
PPM 266301     17:02:02.2 -20:35:43  7.7  0.47  59
PPM 266299     17:01:59.4 -21:17:41  9.0  0.26  59
500886         17:01:35.7 -21:03:09 16.0        59
Positions are for J2000

Event circumstances last updated at 2024/06/23 21:28:06 UT

Marc W. Buie, Southwest Research Institute

RECON