RECON: TNO occultation with 05UN524

Event between 05UN524 and star GA1280:03555576 with event index number of 1957770

Geocentric closest approach at 2023/02/22 05:15:16 UTC

J2000 position of star is 08:29:57.0 +38:01:21
Equinox of date position of star is 08:31:23.5 +37:56:49
Stellar brightness G=14.3, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 120 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 19.0 AU from the Sun and 18.2 AU from the Earth.
The TNO is moving 19.0 km/sec on the sky relative to the star, or, 5.2 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 682 km.
The sky-plane scale is 13236.1 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=102.8 km assuming a 5% albedo -- 5.5 sec chord
Diameter=42.0 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 05UN524, (2023/02/22 05:15UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.8 +27:58:06  1.1 13.67 113
PPM 073799     08:34:24.9 +37:56:07  5.9  0.58 120
PPM 073770     08:32:49.7 +37:11:07  6.0  0.81 120
PPM 073740     08:29:53.7 +38:01:18  9.8  0.32 119
05UN524        08:31:27.2 +37:56:37 14.3       120
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 34.4 km RECON observability=1.0 and success probability=47.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:15:27 -41.5 Dark Down 75.8 171.3 Up 05:10:22 - 05:20:31 2114
Kamloops 05:16:20 -35.6 Dark Down 72.6 130.1 Up 05:11:15 - 05:21:24 2061
Kelowna 05:16:18 -36.5 Dark Down 73.5 129.9 Up 05:11:13 - 05:21:22 1963
Peachland 05:16:19 -36.4 Dark Down 73.5 129.0 Up 05:11:14 - 05:21:23 1955
Summerland 05:16:19 -36.5 Dark Down 73.6 128.8 Up 05:11:14 - 05:21:23 1938
Penticton 05:16:18 -36.6 Dark Down 73.7 128.8 Up 05:11:14 - 05:21:23 1930
Oliver 05:16:19 -36.8 Dark Down 73.9 127.9 Up 05:11:14 - 05:21:23 1892
Victoria 05:16:34 -35.0 Dark Down 72.2 118.7 Up 05:11:29 - 05:21:38 1873
Anarchist Mountain Observatory 05:16:18 -37.0 Dark Down 74.1 127.8 Up 05:11:14 - 05:21:23 1871
Tonasket 05:16:19 -37.1 Dark Down 74.3 126.8 Up 05:11:14 - 05:21:23 1839
Okanogan 05:16:20 -37.2 Dark Down 74.4 125.5 Up 05:11:15 - 05:21:24 1804
Brewster 05:16:21 -37.2 Dark Down 74.4 124.3 Up 05:11:16 - 05:21:25 1778
Manson/Chelan 05:16:22 -37.1 Dark Down 74.4 123.0 Up 05:11:18 - 05:21:27 1760
Wenatchee 05:16:24 -37.3 Dark Down 74.5 121.2 Up 05:11:19 - 05:21:28 1711
Ellensburg 05:16:25 -37.4 Dark Down 74.6 119.5 Up 05:11:20 - 05:21:29 1669
Yakima 05:16:25 -37.5 Dark Down 74.8 118.1 Up 05:11:21 - 05:21:30 1626
Toppenish/White Swan 05:16:25 -37.7 Dark Down 75.0 117.7 Up 05:11:21 - 05:21:30 1600
Goldendale 05:16:27 -37.8 Dark Down 75.0 115.1 Up 05:11:23 - 05:21:32 1546
PNWRO 05:16:20 -38.8 Dark Down 76.1 119.5 Up 05:11:15 - 05:21:24 1541
The Dalles 05:16:29 -37.6 Dark Down 74.8 113.7 Up 05:11:25 - 05:21:34 1527
Maupin 05:16:29 -37.9 Dark Down 75.1 112.5 Up 05:11:25 - 05:21:34 1480
Sisters 05:16:32 -38.0 Dark Down 75.1 108.6 Up 05:11:28 - 05:21:37 1392
Bend 05:16:31 -38.3 Dark Down 75.3 108.1 Up 05:11:27 - 05:21:36 1362
Oregon Observatory 05:16:32 -38.3 Dark Down 75.3 107.3 Up 05:11:28 - 05:21:37 1345
North Lake 05:16:31 -38.9 Dark Down 75.8 105.7 Up 05:11:27 - 05:21:36 1268
Chiloquin 05:16:35 -38.6 Dark Down 75.3 101.9 Up 05:11:31 - 05:21:40 1209
Klamath Falls 05:16:36 -38.8 Dark Down 75.5 100.7 Up 05:11:31 - 05:21:40 1170
Lakeview 05:16:30 -39.7 Dark Down 76.5 102.3 Up 05:11:25 - 05:21:34 1145
Cedarville 05:16:30 -40.1 Dark Down 76.7 99.8 Up 05:11:25 - 05:21:34 1071
Fall River/Burney 05:16:35 -39.5 Dark Down 75.9 96.6 Up 05:11:31 - 05:21:40 1036
Susanville 05:16:33 -40.3 Dark Down 76.5 94.7 Up 05:11:28 - 05:21:37 956
Greenville 05:16:34 -40.2 Dark Down 76.3 93.3 Up 05:11:30 - 05:21:39 930
Gimple 05:16:34 -40.3 Dark Down 76.4 93.4 Up 05:11:30 - 05:21:39 929
Quincy 05:16:35 -40.3 Dark Down 76.3 92.5 Up 05:11:30 - 05:21:39 908
Portola 05:16:33 -40.7 Dark Down 76.7 92.3 Up 05:11:28 - 05:21:37 887
Reno 05:16:30 -41.2 Dark Down 77.2 91.6 Up 05:11:26 - 05:21:35 849
Dunrhomin 05:15:26 -50.2 Dark Down 87.3 145.5 Up 05:10:21 - 05:20:30 814
Carson City 05:16:31 -41.4 Dark Down 77.2 90.1 Up 05:11:26 - 05:21:35 809
CU-SBO 05:15:26 -50.3 Dark Down 87.5 140.8 Up 05:10:22 - 05:20:31 786
Gardnerville 05:16:31 -41.5 Dark Down 77.3 89.0 Up 05:11:26 - 05:21:35 782
Yerington 05:16:28 -41.9 Dark Down 77.7 89.6 Up 05:11:23 - 05:21:32 779
Hawthorne 05:16:26 -42.5 Dark Down 78.1 87.7 Up 05:11:22 - 05:21:31 721
Lee Vining 05:16:29 -42.4 Dark Down 77.7 84.9 Up 05:11:24 - 05:21:33 666
Tonopah 05:16:20 -43.7 Dark Down 79.2 85.9 Up 05:11:16 - 05:21:25 652
Bishop 05:16:26 -43.1 Dark Down 78.2 82.2 Up 05:11:21 - 05:21:30 590
Beatty 05:16:19 -44.5 Dark Down 79.4 79.9 Up 05:11:15 - 05:21:24 519
Indian Springs 05:16:13 -45.4 Dark Down 80.2 77.9 Up 05:11:08 - 05:21:17 472
Henderson 05:16:11 -46.1 Dark Down 80.6 74.4 Up 05:11:07 - 05:21:16 404
Patrick 05:16:07 -47.2 Dark Down 81.2 69.6 Up 05:11:02 - 05:21:11 324
Laughlin/Bullhead City 05:16:10 -46.8 Dark Down 80.6 69.0 Up 05:11:06 - 05:21:15 304
Kingman/Dolan Springs 05:16:08 -47.2 Dark Down 81.0 68.5 Up 05:11:03 - 05:21:12 301
Mohave Valley 05:16:10 -46.9 Dark Down 80.5 67.5 Up 05:11:06 - 05:21:15 274
Wildwood 05:16:29 -44.2 Dark Down 77.2 67.8 Up 05:11:25 - 05:21:34 235
Lake Havasu City 05:16:09 -47.3 Dark Down 80.5 65.0 Up 05:11:05 - 05:21:14 227
Parker 05:16:09 -47.4 Dark Down 80.4 63.0 Up 05:11:05 - 05:21:14 188
Idyllwild 05:16:21 -45.8 Dark Down 78.5 64.4 Up 05:11:17 - 05:21:26 170
George/Scottsdale 05:15:58 -49.4 Dark Down 81.9 55.5 Up 05:10:54 - 05:21:03 119
Calipatria 05:16:13 -46.9 Dark Down 79.0 60.1 Up 05:11:08 - 05:21:17 110
Yuma 05:16:12 -47.8 Dark Down 79.4 56.6 Up 05:11:07 - 05:21:16 32

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 05UN524, (2023/02/22 05:15UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 13.67 113
PPM 073799     08:32:54.8 +38:00:55  5.9  0.58 120
PPM 073770     08:31:20.0 +37:15:52  6.0  0.81 120
PPM 073740     08:28:23.2 +38:05:59  9.8  0.32 119
05UN524        08:29:57.0 +38:01:21 14.3       120
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:53:25 UT

Marc W. Buie, Southwest Research Institute

RECON