RECON: TNO occultation with 04KV18

Event between 04KV18 and star GA0740:13954681 with event index number of 2563358

Geocentric closest approach at 2021/09/30 12:57:19 UTC

J2000 position of star is 17:56:47.5 -15:28:57
Equinox of date position of star is 17:58:02.1 -15:29:01
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 153 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=24.0

TNO is 30.3 AU from the Sun and 30.4 AU from the Earth.
The TNO is moving 10.4 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 729 seconds.
The 1-sigma cross-track error in the shadow position is 4309 km.

The TNO has an absolute magnitude Hv=9.0
Diameter=95.5 km assuming a 5% albedo -- 9.2 sec chord
Diameter=39.0 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 04KV18, (2021/09/30 12:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:44.7 -26:28:42  0.9 23.10 136
35Eta Oph      17:11:37.6 -15:45:01  2.6 11.18 143
PPM 233766     17:57:34.2 -15:48:52  6.1  0.35 153
PPM 233767     17:57:34.2 -15:11:04  8.4  0.32 152
PPM 233786     17:58:12.8 -15:25:31  9.4  0.07 153
04KV18         17:58:02.4 -15:29:01 15.8       153
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 04KV18, (2021/09/30 12:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.10 136
35Eta Oph      17:10:22.7 -15:43:29  2.6 11.18 143
PPM 233766     17:56:19.0 -15:48:47  6.1  0.35 153
PPM 233767     17:56:19.4 -15:10:58  8.4  0.32 152
PPM 233786     17:56:57.9 -15:25:26  9.4  0.07 153
04KV18         17:56:47.5 -15:28:57 15.8       153
Positions are for J2000

Event circumstances last updated at 2021/09/02 01:48:27 UT

Marc W. Buie, Southwest Research Institute

RECON