RECON: TNO occultation with 523776

Event between (523776) 14YB50 and star GA1200:03234758 with event index number of 2354034

Geocentric closest approach at 2023/01/02 04:56:16 UTC

J2000 position of star is 08:54:31.9 +30:12:08
Equinox of date position of star is 08:55:55.4 +30:06:49
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 79 degrees from the moon. Moon is 80% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 37.7 AU from the Sun and 36.8 AU from the Earth.
Apparent velocity is 23.1 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 73 seconds.
The 1-sigma cross-track error in the shadow position is 1585 km.
The sky-plane scale is 26715.6 km/arcsec.

The object has an absolute magnitude Hv=6.0
Diameter=369.8 km assuming a 5% albedo -- 16.1 sec chord
Diameter=151.0 km assuming a 30% albedo -- 6.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523776, (2023/01/02 04:56UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.3 +27:58:08  1.1 15.26  65
46 Cnc         08:46:45.8 +30:36:46  6.1  2.04  77
PPM 099122     08:54:23.6 +29:52:23  8.4  0.41  79
PPM 074077     08:55:32.9 +30:17:57 10.6  0.20  79
523776         08:55:55.5 +30:06:49 16.2        79
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 5.0 sigma about the mid-time.
The median site spacing is 27.0 km RECON observability=1.0 and success probability=0.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:00:04 -44.8 Dark Up 30.6 78.4 Up 04:53:28 - 05:06:40 -5839
Sleaford 04:59:40 -52.0 Dark Up 39.6 90.0 Up 04:53:04 - 05:06:16 -5941
Kelowna 05:00:05 -45.6 Dark Up 31.0 78.6 Up 04:53:29 - 05:06:41 -5943
Peachland 05:00:05 -45.5 Dark Up 30.8 78.3 Up 04:53:29 - 05:06:41 -5947
Summerland 05:00:05 -45.6 Dark Up 30.8 78.3 Up 04:53:29 - 05:06:41 -5965
Penticton 05:00:05 -45.7 Dark Up 30.9 78.3 Up 04:53:29 - 05:06:41 -5974
Victoria 05:00:12 -43.6 Dark Up 28.2 75.2 Low 04:53:36 - 05:06:48 -5984
Oliver 05:00:06 -45.8 Dark Up 30.8 78.1 Up 04:53:30 - 05:06:42 -6010
Anarchist Mountain Observatory 05:00:06 -46.0 Dark Up 30.9 78.1 Up 04:53:30 - 05:06:42 -6033
Okanogan 05:00:07 -46.1 Dark Up 30.6 77.6 Up 04:53:31 - 05:06:43 -6094
Brewster 05:00:07 -46.0 Dark Up 30.4 77.3 Up 04:53:31 - 05:06:43 -6118
Manson/Chelan 05:00:09 -45.9 Dark Up 30.1 77.0 Up 04:53:33 - 05:06:45 -6131
Wenatchee 05:00:10 -45.9 Dark Up 29.9 76.6 Low 04:53:34 - 05:06:46 -6176
Ellensburg 05:00:10 -45.9 Dark Up 29.7 76.2 Low 04:53:34 - 05:06:46 -6213
Yakima 05:00:11 -46.0 Dark Up 29.6 76.0 Low 04:53:35 - 05:06:47 -6255
Toppenish/White Swan 05:00:11 -46.2 Dark Up 29.6 76.0 Low 04:53:35 - 05:06:47 -6281
The Dalles 05:00:12 -45.8 Dark Up 28.9 75.1 Low 04:53:36 - 05:06:48 -6342
PNWRO 05:00:09 -47.3 Dark Up 30.5 76.7 Up 04:53:33 - 05:06:45 -6356
Maupin 05:00:14 -46.0 Dark Up 28.9 74.9 Low 04:53:38 - 05:06:50 -6388
Sisters 05:00:16 -45.9 Dark Up 28.3 74.2 Low 04:53:40 - 05:06:52 -6467
Bend 05:00:15 -46.1 Dark Up 28.4 74.2 Low 04:53:39 - 05:06:51 -6498
Oregon Observatory 05:00:15 -46.1 Dark Up 28.3 74.0 Low 04:53:39 - 05:06:51 -6513
Chiloquin 05:00:18 -46.0 Dark Up 27.6 73.1 Low 04:53:42 - 05:06:54 -6639
Klamath Falls 05:00:18 -46.2 Dark Up 27.6 73.0 Low 04:53:42 - 05:06:54 -6677
Cedarville 05:00:17 -47.5 Dark Up 28.5 73.5 Low 04:53:41 - 05:06:53 -6793
Fall River/Burney 05:00:18 -46.7 Dark Up 27.5 72.6 Low 04:53:42 - 05:06:54 -6810
Greenville 05:00:19 -47.1 Dark Up 27.6 72.4 Low 04:53:43 - 05:06:55 -6917
Gimple 05:00:18 -47.2 Dark Up 27.6 72.4 Low 04:53:42 - 05:06:54 -6920
Quincy 05:00:19 -47.2 Dark Up 27.5 72.3 Low 04:53:43 - 05:06:55 -6939
Portola 05:00:18 -47.6 Dark Up 27.8 72.5 Low 04:53:42 - 05:06:54 -6965
Reno 05:00:17 -48.1 Dark Up 28.2 72.7 Low 04:53:41 - 05:06:53 -7011
Carson City 05:00:18 -48.2 Dark Up 28.1 72.5 Low 04:53:42 - 05:06:54 -7050
Gardnerville 05:00:18 -48.2 Dark Up 28.1 72.4 Low 04:53:42 - 05:06:54 -7077
Yerington 05:00:17 -48.7 Dark Up 28.5 72.7 Low 04:53:41 - 05:06:53 -7087
Hawthorne 05:00:16 -49.2 Dark Up 28.8 72.8 Low 04:53:40 - 05:06:52 -7151
Lee Vining 05:00:18 -48.9 Dark Up 28.2 72.2 Low 04:53:42 - 05:06:54 -7197
Dunrhomin 04:59:50 -58.6 Dark Up 39.2 80.8 Up 04:53:14 - 05:06:26 -7238
Nikitin 04:59:49 -58.6 Dark Up 39.2 80.6 Up 04:53:13 - 05:06:25 -7258
CU-SBO 04:59:49 -58.6 Dark Up 39.1 80.5 Up 04:53:13 - 05:06:25 -7264
Bishop 05:00:17 -49.5 Dark Up 28.6 72.3 Low 04:53:41 - 05:06:53 -7280
Beatty 05:00:14 -50.9 Dark Up 29.7 72.8 Low 04:53:38 - 05:06:50 -7372
Patrick 05:00:10 -53.4 Dark Up 31.5 73.2 Up 04:53:34 - 05:06:46 -7601
Laughlin/Bullhead City 05:00:11 -52.9 Dark Up 30.9 72.8 Up 04:53:35 - 05:06:47 -7611
Wildwood 05:00:19 -49.7 Dark Up 27.4 70.5 Low 04:53:43 - 05:06:55 -7620
Lake Havasu City 05:00:11 -53.2 Dark Up 30.9 72.5 Up 04:53:35 - 05:06:47 -7689
Idyllwild 05:00:16 -51.3 Dark Up 28.8 71.1 Low 04:53:40 - 05:06:52 -7709
Calipatria 05:00:13 -52.3 Dark Up 29.5 71.3 Low 04:53:37 - 05:06:49 -7805
George/Scottsdale 05:00:06 -55.3 Dark Up 32.6 73.1 Up 04:53:30 - 05:06:42 -7829
Yuma 05:00:12 -53.1 Dark Up 30.1 71.4 Up 04:53:36 - 05:06:48 -7873

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 523776, (2023/01/02 04:56UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 15.26  65
46 Cnc         08:45:21.4 +30:41:52  6.1  2.04  77
PPM 099122     08:53:00.0 +29:57:40  8.4  0.41  79
PPM 074077     08:54:09.2 +30:23:16 10.6  0.20  79
523776         08:54:31.9 +30:12:08 16.2        79
Positions are for J2000

Event circumstances last updated at 2022/12/24 03:38:56 UT

Marc W. Buie, Southwest Research Institute

RECON