RECON: TNO occultation with 136108

Event between (136108) Haumea and star GA1040:03735761 with event index number of 2039155

Geocentric closest approach at 2024/03/19 19:59:21 UTC

J2000 position of star is 14:36:27.1 +14:59:36
Equinox of date position of star is 14:37:32.0 +14:53:42
Stellar brightness G=12.5, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 89 degrees from the moon. Moon is 75% illuminated.
TNO apparent brightness V=17.3

TNO is 50.0 AU from the Sun and 49.2 AU from the Earth.
The TNO is moving 22.7 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 1810 km.

The TNO has an absolute magnitude Hv=0.2
Diameter=5420.2 km assuming a 5% albedo -- 239.0 sec chord
Diameter=2212.8 km assuming a 30% albedo -- 97.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 136108, (2024/03/19 20:00UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:46.2 +19:03:32  0.0  6.50  82
Alphekka       15:35:42.8 +26:38:04  2.2 17.93  95
29Pi 1Boo      14:41:52.1 +16:18:57  4.1  1.76  89
PPM 130657     14:33:59.0 +13:57:18  7.1  1.28  88
PPM 130712     14:38:12.0 +14:36:27  9.5  0.32  89
PPM 130705     14:37:50.0 +14:58:07 10.3  0.10  89
136108         14:37:36.1 +14:53:20 12.5        89
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 136108, (2024/03/19 20:00UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:14  0.0  6.50  82
Alphekka       15:34:41.5 +26:42:51  2.2 17.93  95
29Pi 1Boo      14:40:43.7 +16:25:07  4.1  1.76  89
PPM 130657     14:32:49.6 +14:03:38  7.1  1.28  88
PPM 130712     14:37:02.9 +14:42:42  9.5  0.32  89
PPM 130705     14:36:41.1 +15:04:23 10.3  0.10  89
136108         14:36:27.1 +14:59:36 12.5        89
Positions are for J2000

Event circumstances last updated at 2022/10/11 04:16:47 UT

Marc W. Buie, Southwest Research Institute

RECON