RECON: TNO occultation with 12XW159

Event between 12XW159 and star GA0960:01413367 with event index number of 2035635

Geocentric closest approach at 2023/01/24 06:53:05 UTC

J2000 position of star is 06:15:40.0 +06:13:00
Equinox of date position of star is 06:16:54.2 +06:12:27
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 9% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 32.1 AU from the Sun and 31.3 AU from the Earth.
Apparent velocity is 21.6 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 189 seconds.
The 1-sigma cross-track error in the shadow position is 1541 km.
The sky-plane scale is 22697.2 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=200.5 km assuming a 5% albedo -- 9.3 sec chord
Diameter=81.8 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 12XW159, (2023/01/24 06:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:25.3 +07:24:34  0.4  5.22 108
Alhena         06:39:02.6 +16:22:39  1.9 11.52 120
PPM 150179     06:16:54.3 +06:03:25  5.8  0.15 113
PPM 150223     06:18:24.7 +06:04:22  8.5  0.40 113
PPM 150179     06:16:54.3 +06:03:25  5.8  0.15 113
12XW159        06:16:54.3 +06:12:27 14.5       113
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 4.8 sigma about the mid-time.
The median site spacing is 19.5 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:52:47 -56.9 Dark Down 39.1 215.2 Up 06:37:47 - 07:07:47 9387
Kamloops 06:53:25 -54.8 Dark Down 44.4 197.4 Up 06:38:25 - 07:08:25 8988
Kelowna 06:53:20 -55.8 Dark Down 44.9 198.8 Up 06:38:20 - 07:08:20 8949
Peachland 06:53:21 -55.8 Dark Down 45.1 198.5 Up 06:38:21 - 07:08:21 8935
Summerland 06:53:21 -56.0 Dark Down 45.2 198.7 Up 06:38:21 - 07:08:21 8926
Penticton 06:53:21 -56.0 Dark Down 45.3 198.8 Up 06:38:21 - 07:08:21 8924
Oliver 06:53:19 -56.3 Dark Down 45.6 198.9 Up 06:38:19 - 07:08:19 8899
Anarchist Mountain Observatory 06:53:19 -56.6 Dark Down 45.7 199.3 Up 06:38:19 - 07:08:19 8891
Okanogan 06:53:19 -57.0 Dark Down 46.4 199.2 Up 06:38:19 - 07:08:19 8838
Brewster 06:53:19 -57.1 Dark Down 46.7 199.0 Up 06:38:19 - 07:08:19 8814
Manson/Chelan 06:53:20 -57.2 Dark Down 47.0 198.5 Up 06:38:20 - 07:08:20 8790
Victoria 06:53:31 -55.3 Dark Down 47.0 193.7 Up 06:38:31 - 07:08:31 8765
Wenatchee 06:53:18 -57.5 Dark Down 47.5 198.4 Up 06:38:18 - 07:08:18 8751
Ellensburg 06:53:19 -57.7 Dark Down 47.9 198.3 Up 06:38:19 - 07:08:19 8715
Yakima 06:53:18 -58.0 Dark Down 48.3 198.4 Up 06:38:18 - 07:08:18 8683
PNWRO 06:53:11 -59.2 Dark Down 48.5 201.0 Up 06:38:11 - 07:08:11 8678
Toppenish/White Swan 06:53:17 -58.3 Dark Down 48.5 198.7 Up 06:38:17 - 07:08:17 8671
The Dalles 06:53:19 -58.5 Dark Down 49.4 197.8 Up 06:38:19 - 07:08:19 8592
Dunrhomin 06:52:13 -68.6 Dark Down 48.1 223.1 Up 06:37:13 - 07:07:13 8573
Maupin 06:53:17 -58.9 Dark Down 49.7 198.1 Up 06:38:17 - 07:08:17 8562
Nikitin 06:52:13 -68.7 Dark Down 48.2 223.2 Up 06:37:13 - 07:07:13 8558
CU-SBO 06:52:13 -68.8 Dark Down 48.3 223.1 Up 06:37:13 - 07:07:13 8551
Sisters 06:53:18 -59.3 Dark Down 50.7 197.7 Up 06:38:18 - 07:08:18 8481
Bend 06:53:15 -59.6 Dark Down 50.9 198.2 Up 06:38:15 - 07:08:15 8469
Oregon Observatory 06:53:16 -59.7 Dark Down 51.0 198.0 Up 06:38:16 - 07:08:16 8452
Chiloquin 06:53:16 -60.4 Dark Down 52.4 197.9 Up 06:38:16 - 07:08:16 8335
Klamath Falls 06:53:14 -60.7 Dark Down 52.7 198.2 Up 06:38:14 - 07:08:14 8309
Cedarville 06:53:07 -62.0 Dark Down 53.0 201.0 Up 06:38:07 - 07:08:07 8292
Fall River/Burney 06:53:11 -61.7 Dark Down 53.7 199.3 Up 06:38:11 - 07:08:11 8221
Gimple 06:53:07 -62.7 Dark Down 54.5 200.5 Up 06:38:07 - 07:08:07 8159
Greenville 06:53:08 -62.6 Dark Down 54.5 200.4 Up 06:38:08 - 07:08:08 8157
Portola 06:53:05 -63.1 Dark Down 54.7 201.3 Up 06:38:05 - 07:08:05 8142
Quincy 06:53:07 -62.8 Dark Down 54.7 200.5 Up 06:38:07 - 07:08:07 8140
Reno 06:53:03 -63.6 Dark Down 54.7 202.5 Up 06:38:03 - 07:08:03 8136
Yerington 06:53:00 -64.4 Dark Down 55.0 203.9 Up 06:38:00 - 07:08:00 8106
Carson City 06:53:02 -63.9 Dark Down 55.0 202.8 Up 06:38:02 - 07:08:02 8106
Gardnerville 06:53:00 -64.1 Dark Down 55.3 203.0 Up 06:38:00 - 07:08:00 8087
Hawthorne 06:52:55 -65.0 Dark Down 55.3 205.0 Up 06:37:55 - 07:07:55 8081
Lee Vining 06:52:57 -65.1 Dark Down 56.0 204.6 Up 06:37:57 - 07:07:57 8020
Beatty 06:52:45 -67.2 Dark Down 56.1 209.1 Up 06:37:45 - 07:07:45 7991
Bishop 06:52:53 -65.9 Dark Down 56.3 206.1 Up 06:37:53 - 07:07:53 7987
Patrick 06:52:32 -69.8 Dark Down 56.1 214.9 Up 06:37:32 - 07:07:32 7941
Laughlin/Bullhead City 06:52:35 -69.6 Dark Down 56.6 214.0 Up 06:37:35 - 07:07:35 7900
George/Scottsdale 06:52:21 -72.2 Dark Down 56.5 219.5 Up 06:37:21 - 07:07:21 7849
Lake Havasu City 06:52:31 -70.2 Dark Down 57.1 214.9 Up 06:37:31 - 07:07:31 7848
Idyllwild 06:52:39 -69.4 Dark Down 58.8 211.7 Up 06:37:39 - 07:07:39 7715
Wildwood 06:52:47 -67.9 Dark Down 59.3 208.1 Up 06:37:47 - 07:07:47 7694
Calipatria 06:52:34 -70.5 Dark Down 58.8 214.2 Up 06:37:34 - 07:07:34 7693
Yuma 06:52:29 -71.3 Dark Down 58.7 216.1 Up 06:37:29 - 07:07:29 7680

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 12XW159, (2023/01/24 06:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  5.22 108
Alhena         06:37:42.8 +16:23:57  1.9 11.52 120
PPM 150179     06:15:40.2 +06:03:57  5.8  0.15 113
PPM 150223     06:17:10.5 +06:04:58  8.5  0.40 113
PPM 150179     06:15:40.2 +06:03:57  5.8  0.15 113
12XW159        06:15:40.0 +06:13:00 14.5       113
Positions are for J2000

Event circumstances last updated at 2023/01/08 03:29:42 UT

Marc W. Buie, Southwest Research Institute

RECON