RECON: TNO occultation with 50000

Event between (50000) Quaoar and star GA0740:17453907 with event index number of 1226304

Geocentric closest approach at 2022/08/09 06:32:45 UTC

J2000 position of star is 18:21:42.9 -15:12:46
Equinox of date position of star is 18:22:56.0 -15:12:04
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 12 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=18.9

[RECON map]
TNO is 42.7 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 17.6 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 137 seconds.
The 1-sigma cross-track error in the shadow position is 1525 km.
The sky-plane scale is 30449.2 km/arcsec.

The TNO has an absolute magnitude Hv=2.5
Diameter=1896.8 km assuming a 5% albedo -- 107.9 sec chord
Diameter=774.4 km assuming a 30% albedo -- 44.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 50000, (2022/08/09 06:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.8 -26:28:49  0.9 28.45  28
Nunki          18:56:39.9 -26:16:00  2.0 13.57   5
PPM 234386     18:21:26.9 -15:49:14  5.2  0.73  12
PPM 234411     18:22:20.0 -15:13:08  7.2  0.16  12
50000          18:23:00.5 -15:12:02 15.3        12
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 18.0 km RECON observability=1.0 and success probability=17.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 06:30:22 -20.9 Dark Up 22.1 201.5 Low 06:18:25 - 06:42:18 -945
Victoria 06:30:35 -21.3 Dark Up 24.6 197.6 Low 06:18:39 - 06:42:32 -959
Peachland 06:30:23 -21.2 Dark Up 22.6 201.1 Low 06:18:26 - 06:42:19 -962
Kelowna 06:30:22 -21.2 Dark Up 22.5 201.4 Low 06:18:26 - 06:42:19 -962
Summerland 06:30:22 -21.4 Dark Up 22.8 201.2 Low 06:18:26 - 06:42:19 -972
Penticton 06:30:22 -21.4 Dark Up 22.8 201.3 Low 06:18:26 - 06:42:19 -978
Oliver 06:30:21 -21.8 Dark Up 23.1 201.4 Low 06:18:25 - 06:42:18 -997
Anarchist Mountain Observatory 06:30:20 -22.0 Dark Up 23.2 201.6 Low 06:18:24 - 06:42:17 -1009
Tonasket 06:30:21 -22.2 Dark Up 23.5 201.6 Low 06:18:24 - 06:42:17 -1025
Okanogan 06:30:21 -22.5 Dark Up 23.9 201.5 Low 06:18:25 - 06:42:18 -1041
Brewster 06:30:21 -22.7 Dark Up 24.2 201.3 Low 06:18:25 - 06:42:18 -1052
Manson/Chelan 06:30:23 -22.8 Dark Up 24.5 201.0 Low 06:18:26 - 06:42:19 -1056
Wenatchee 06:30:23 -23.2 Dark Up 25.0 200.9 Low 06:18:26 - 06:42:19 -1079
Ellensburg 06:30:23 -23.5 Dark Up 25.4 200.7 Low 06:18:27 - 06:42:20 -1098
Yakima 06:30:23 -23.8 Dark Up 25.8 200.8 Low 06:18:26 - 06:42:19 -1121
Toppenish/White Swan 06:30:22 -24.1 Dark Up 26.0 201.0 Low 06:18:26 - 06:42:19 -1137
Goldendale 06:30:23 -24.4 Dark Up 26.6 200.7 Low 06:18:26 - 06:42:19 -1161
The Dalles 06:30:25 -24.5 Dark Up 26.9 200.3 Low 06:18:28 - 06:42:21 -1167
Pasco 06:30:17 -24.5 Dark Up 25.7 202.3 Low 06:18:21 - 06:42:14 -1171
PNWRO 06:30:16 -24.8 Dark Up 25.9 202.6 Low 06:18:20 - 06:42:13 -1190
Maupin 06:30:24 -24.9 Dark Up 27.2 200.5 Low 06:18:27 - 06:42:20 -1194
Sisters 06:30:25 -25.6 Dark Up 28.2 200.1 Low 06:18:28 - 06:42:21 -1236
Redmond 06:30:24 -25.7 Dark Up 28.1 200.6 Low 06:18:27 - 06:42:20 -1246
Bend 06:30:24 -25.9 Dark Up 28.3 200.5 Low 06:18:27 - 06:42:20 -1256
Oregon Observatory 06:30:25 -26.0 Dark Up 28.5 200.4 Low 06:18:28 - 06:42:21 -1264
La Pine/Gilchrist 06:30:25 -26.1 Dark Up 28.7 200.3 Low 06:18:28 - 06:42:21 -1275
North Lake 06:30:21 -26.7 Dark Up 29.0 201.0 Low 06:18:25 - 06:42:18 -1315
Chiloquin 06:30:25 -27.0 Dark Up 29.9 200.2 Low 06:18:29 - 06:42:22 -1337
Paisley 06:30:19 -27.3 Dark Up 29.4 201.5 Low 06:18:23 - 06:42:16 -1358
Klamath Falls 06:30:25 -27.3 Dark Up 30.2 200.3 Up 06:18:28 - 06:42:21 -1361
Lakeview 06:30:19 -27.8 Dark Up 29.8 201.8 Low 06:18:22 - 06:42:15 -1394
Cedarville 06:30:17 -28.5 Dark Up 30.4 202.2 Up 06:18:21 - 06:42:14 -1441
Fall River/Burney 06:30:22 -28.5 Dark Up 31.2 201.0 Up 06:18:25 - 06:42:18 -1446
Susanville 06:30:19 -29.3 Dark Up 31.6 201.9 Up 06:18:22 - 06:42:15 -1504
Greenville 06:30:19 -29.5 Dark Up 31.9 201.7 Up 06:18:23 - 06:42:16 -1516
Gimple 06:30:20 -29.5 Dark Up 31.9 201.7 Up 06:18:23 - 06:42:16 -1518
Quincy 06:30:20 -29.6 Dark Up 32.1 201.7 Up 06:18:23 - 06:42:16 -1530
Portola 06:30:18 -29.9 Dark Up 32.1 202.2 Up 06:18:21 - 06:42:14 -1549
Reno 06:30:14 -30.4 Dark Up 32.1 203.0 Up 06:18:18 - 06:42:11 -1582
Carson City 06:30:14 -30.7 Dark Up 32.5 203.1 Up 06:18:18 - 06:42:11 -1607
Gardnerville 06:30:14 -30.9 Dark Up 32.7 203.2 Up 06:18:17 - 06:42:10 -1625
Yerington 06:30:11 -31.1 Dark Up 32.4 203.8 Up 06:18:15 - 06:42:08 -1635
Hawthorne 06:30:09 -31.7 Dark Up 32.7 204.5 Up 06:18:12 - 06:42:05 -1680
Lee Vining 06:30:11 -32.0 Dark Up 33.4 204.1 Up 06:18:14 - 06:42:07 -1708
Tonopah 06:30:02 -32.6 Dark Up 32.7 206.1 Up 06:18:06 - 06:41:59 -1746
Bishop 06:30:07 -32.8 Dark Up 33.7 205.1 Up 06:18:10 - 06:42:03 -1768
Beatty 06:29:59 -33.8 Dark Up 33.5 207.0 Up 06:18:03 - 06:41:56 -1841
CPSLO 06:30:16 -33.8 Dark Up 36.3 203.2 Up 06:18:20 - 06:42:13 -1866
Dunrhomin 06:29:15 -33.3 Dark Up 26.0 217.4 Low 06:17:19 - 06:41:12 -1888
Indian Springs 06:29:54 -34.4 Dark Up 33.4 208.2 Up 06:17:58 - 06:41:51 -1892
Henderson 06:29:51 -35.1 Dark Up 33.6 209.1 Up 06:17:55 - 06:41:48 -1949
Wildwood 06:30:06 -35.7 Dark Up 36.7 205.8 Up 06:18:10 - 06:42:03 -2006
Patrick 06:29:45 -36.0 Dark Up 33.7 210.4 Up 06:17:49 - 06:41:42 -2025
Laughlin/Bullhead City 06:29:48 -36.1 Dark Up 34.2 209.8 Up 06:17:51 - 06:41:44 -2026
Kingman/Dolan Springs 06:29:46 -36.2 Dark Up 34.0 210.3 Up 06:17:49 - 06:41:42 -2037
Mohave Valley 06:29:48 -36.3 Dark Up 34.5 209.9 Up 06:17:51 - 06:41:44 -2047
Idyllwild 06:29:57 -36.7 Dark Up 36.3 208.0 Up 06:18:01 - 06:41:54 -2081
Lake Havasu City 06:29:47 -36.8 Dark Up 34.7 210.3 Up 06:17:50 - 06:41:43 -2084
Parker 06:29:47 -37.1 Dark Up 35.0 210.4 Up 06:17:50 - 06:41:43 -2112
Blythe 06:29:48 -37.5 Dark Up 35.6 210.3 Up 06:17:51 - 06:41:44 -2145
Calipatria 06:29:51 -37.6 Dark Up 36.4 209.5 Up 06:17:55 - 06:41:48 -2159
George/Scottsdale 06:29:35 -38.2 Dark Up 34.3 213.1 Up 06:17:38 - 06:41:31 -2209
Yuma 06:29:47 -38.3 Dark Up 36.4 210.6 Up 06:17:51 - 06:41:44 -2217

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 50000, (2022/08/09 06:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 28.45  28
Nunki          18:55:15.9 -26:17:49  2.0 13.57   5
PPM 234386     18:20:08.9 -15:49:55  5.2  0.73  12
PPM 234411     18:21:02.3 -15:13:50  7.2  0.16  12
50000          18:21:42.9 -15:12:46 15.3        12
Positions are for J2000

Event circumstances last updated at 2021/04/11 23:48:45 UT

Marc W. Buie, Southwest Research Institute

RECON