RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star GA1140:02927253 with event index number of 2289016

Geocentric closest approach at 2023/02/12 06:11:37 UTC

J2000 position of star is 07:45:25.0 +25:26:15
Equinox of date position of star is 07:46:45.8 +25:22:57
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 103 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 29.2 AU from the Sun and 28.3 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 81 seconds.
The 1-sigma cross-track error in the shadow position is 1068 km.
The sky-plane scale is 20539.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=313.3 km assuming a 5% albedo -- 15.4 sec chord
Diameter=127.9 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2023/02/12 06:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.7 +27:58:07  1.1  2.59 103
77Kap Gem      07:45:50.4 +24:20:26  3.6  1.06 103
76 Gem         07:45:31.3 +25:43:38  6.6  0.45 103
450265         07:46:49.2 +25:22:48 15.7       102
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 31.6 km RECON observability=1.0 and success probability=27.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:11:14 -49.4 Dark Down 61.7 204.5 Up 06:03:59 - 06:18:29 2893
Kamloops 06:12:01 -45.4 Dark Down 64.7 176.5 Up 06:04:46 - 06:19:16 2596
Kelowna 06:11:57 -46.4 Dark Down 65.6 178.3 Up 06:04:42 - 06:19:12 2521
Peachland 06:11:58 -46.3 Dark Down 65.7 177.6 Up 06:04:43 - 06:19:13 2508
Summerland 06:11:57 -46.5 Dark Down 65.8 177.8 Up 06:04:42 - 06:19:12 2493
Penticton 06:11:57 -46.6 Dark Down 65.9 178.1 Up 06:04:42 - 06:19:12 2488
Oliver 06:11:57 -46.8 Dark Down 66.2 178.0 Up 06:04:42 - 06:19:12 2452
Anarchist Mountain Observatory 06:11:56 -47.0 Dark Down 66.4 178.4 Up 06:04:41 - 06:19:11 2436
Tonasket 06:11:56 -47.2 Dark Down 66.7 178.3 Up 06:04:41 - 06:19:11 2404
Okanogan 06:11:57 -47.4 Dark Down 67.1 177.9 Up 06:04:42 - 06:19:12 2369
Victoria 06:12:10 -45.4 Dark Down 66.6 169.3 Up 06:04:55 - 06:19:25 2357
Brewster 06:11:57 -47.5 Dark Down 67.3 177.4 Up 06:04:42 - 06:19:12 2339
Manson/Chelan 06:11:59 -47.4 Dark Down 67.5 176.5 Up 06:04:44 - 06:19:14 2315
Wenatchee 06:11:59 -47.7 Dark Down 68.0 176.0 Up 06:04:44 - 06:19:14 2265
Ellensburg 06:11:59 -47.8 Dark Down 68.4 175.4 Up 06:04:44 - 06:19:14 2221
Yakima 06:11:59 -48.1 Dark Down 68.8 175.3 Up 06:04:44 - 06:19:14 2179
Toppenish/White Swan 06:11:59 -48.3 Dark Down 69.0 175.7 Up 06:04:44 - 06:19:14 2158
PNWRO 06:11:53 -49.3 Dark Down 69.4 179.4 Up 06:04:38 - 06:19:08 2133
Goldendale 06:12:00 -48.5 Dark Down 69.5 174.5 Up 06:04:45 - 06:19:15 2097
The Dalles 06:12:01 -48.4 Dark Down 69.7 173.5 Up 06:04:46 - 06:19:16 2071
Maupin 06:12:00 -48.8 Dark Down 70.2 173.6 Up 06:04:45 - 06:19:15 2028
Sisters 06:12:02 -49.0 Dark Down 71.0 172.0 Up 06:04:47 - 06:19:17 1932
Bend 06:12:01 -49.3 Dark Down 71.3 172.6 Up 06:04:46 - 06:19:16 1909
Oregon Observatory 06:12:01 -49.4 Dark Down 71.4 172.2 Up 06:04:46 - 06:19:16 1890
North Lake 06:11:59 -50.1 Dark Down 72.1 173.5 Up 06:04:44 - 06:19:14 1827
Chiloquin 06:12:02 -49.9 Dark Down 72.7 170.4 Up 06:04:47 - 06:19:17 1748
Dunrhomin 06:10:54 -60.0 Dark Down 71.5 220.8 Up 06:03:39 - 06:18:09 1721
Lakeview 06:11:56 -51.0 Dark Down 73.2 174.8 Up 06:04:41 - 06:19:11 1720
Klamath Falls 06:12:02 -50.2 Dark Down 73.0 170.4 Up 06:04:47 - 06:19:17 1712
CU-SBO 06:10:54 -60.2 Dark Down 71.8 221.0 Up 06:03:39 - 06:18:09 1694
Cedarville 06:11:55 -51.5 Dark Down 73.9 175.1 Up 06:04:40 - 06:19:10 1652
Fall River/Burney 06:12:00 -51.1 Dark Down 74.2 171.0 Up 06:04:45 - 06:19:15 1590
Susanville 06:11:57 -51.9 Dark Down 74.9 173.1 Up 06:04:42 - 06:19:12 1529
Gimple 06:11:57 -51.9 Dark Down 75.2 172.2 Up 06:04:42 - 06:19:12 1498
Greenville 06:11:58 -51.9 Dark Down 75.2 172.0 Up 06:04:43 - 06:19:13 1497
Quincy 06:11:58 -52.0 Dark Down 75.4 171.9 Up 06:04:43 - 06:19:13 1476
Portola 06:11:56 -52.3 Dark Down 75.5 173.5 Up 06:04:41 - 06:19:11 1466
Reno 06:11:53 -52.9 Dark Down 75.9 175.7 Up 06:04:38 - 06:19:08 1444
Carson City 06:11:53 -53.1 Dark Down 76.2 175.7 Up 06:04:38 - 06:19:08 1406
Yerington 06:11:50 -53.6 Dark Down 76.4 178.0 Up 06:04:35 - 06:19:05 1391
Gardnerville 06:11:52 -53.3 Dark Down 76.5 175.8 Up 06:04:37 - 06:19:07 1380
Hawthorne 06:11:47 -54.2 Dark Down 76.9 180.0 Up 06:04:32 - 06:19:02 1346
Tonopah 06:11:41 -55.4 Dark Down 77.3 185.8 Up 06:04:26 - 06:18:56 1312
Lee Vining 06:11:49 -54.2 Dark Down 77.5 178.0 Up 06:04:34 - 06:19:04 1281
Bishop 06:11:46 -55.1 Dark Down 78.1 181.0 Up 06:04:31 - 06:19:01 1224
Beatty 06:11:38 -56.4 Dark Down 78.4 188.3 Up 06:04:23 - 06:18:53 1192
Indian Springs 06:11:33 -57.2 Dark Down 78.6 193.4 Up 06:04:18 - 06:18:48 1170
Henderson 06:11:30 -58.0 Dark Down 79.0 197.1 Up 06:04:15 - 06:18:45 1121
Patrick 06:11:25 -59.1 Dark Down 79.2 203.3 Up 06:04:10 - 06:18:40 1069
Kingman/Dolan Springs 06:11:25 -59.1 Dark Down 79.5 202.8 Up 06:04:10 - 06:18:40 1042
Laughlin/Bullhead City 06:11:27 -58.8 Dark Down 79.7 200.5 Up 06:04:12 - 06:18:42 1033
Mohave Valley 06:11:27 -59.0 Dark Down 79.9 201.1 Up 06:04:12 - 06:18:42 1003
Lake Havasu City 06:11:26 -59.4 Dark Down 80.2 203.1 Up 06:04:11 - 06:18:41 963
Parker 06:11:25 -59.6 Dark Down 80.5 204.1 Up 06:04:10 - 06:18:40 926
George/Scottsdale 06:11:14 -61.4 Dark Down 79.9 216.6 Up 06:03:59 - 06:18:29 915
Wildwood 06:11:44 -56.7 Dark Down 81.3 180.1 Up 06:04:29 - 06:18:59 867
Idyllwild 06:11:36 -58.2 Dark Down 81.5 191.6 Up 06:04:21 - 06:18:51 850
Calipatria 06:11:30 -59.3 Dark Down 81.9 199.8 Up 06:04:15 - 06:18:45 799
Yuma 06:11:25 -60.2 Dark Down 82.0 206.2 Up 06:04:10 - 06:18:40 764

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 450265, (2023/02/12 06:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  2.59 103
77Kap Gem      07:44:26.8 +24:23:52  3.6  1.06 103
76 Gem         07:44:06.9 +25:47:03  6.6  0.45 103
450265         07:45:25.0 +25:26:15 15.7       102
Positions are for J2000

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

Marc W. Buie, Southwest Research Institute

RECON