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 06:29:32 UTC

J2000 position of star is 18:21:42.9 -15:12:46
Equinox of date position of star is 18:22:50.8 -15:12:07
Stellar brightness G=15.3, use SENSEUP=128
Star is 12 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=18.8

[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 181 seconds.
The 1-sigma cross-track error in the shadow position is 1528 km.0.050 arcsec
The sky-plane scale is 30449.3 km/arcsec.

The TNO has an absolute magnitude Hv=2.4
Diameter=1995.3 km assuming a 5% albedo -- 113.5 sec chord
Diameter=814.6 km assuming a 30% albedo -- 46.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 50000, (2022/08/09 06:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.8 -26:28:49  0.9 28.45  27
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 15.6 km RECON observability=1.0 and success probability=15.6%
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 06:27:12 -20.6 Dark Up 22.3 200.7 Low 06:12:12 - 06:42:12 -1299
Victoria 06:27:26 -21.0 Dark Up 24.7 196.8 Low 06:12:26 - 06:42:26 -1313
Kelowna 06:27:13 -21.0 Dark Up 22.7 200.6 Low 06:12:13 - 06:42:13 -1316
Summerland 06:27:13 -21.1 Dark Up 22.9 200.4 Low 06:12:13 - 06:42:13 -1326
Penticton 06:27:12 -21.2 Dark Up 23.0 200.5 Low 06:12:12 - 06:42:12 -1332
Oliver 06:27:12 -21.5 Dark Up 23.3 200.6 Low 06:12:12 - 06:42:12 -1351
Anarchist Mountain Observatory 06:27:11 -21.8 Dark Up 23.4 200.8 Low 06:12:11 - 06:42:11 -1363
Tonasket 06:27:11 -22.0 Dark Up 23.7 200.8 Low 06:12:11 - 06:42:11 -1379
Okanogan 06:27:12 -22.3 Dark Up 24.1 200.7 Low 06:12:12 - 06:42:12 -1395
Brewster 06:27:11 -22.5 Dark Up 24.4 200.5 Low 06:12:11 - 06:42:11 -1406
Manson/Chelan 06:27:13 -22.5 Dark Up 24.7 200.2 Low 06:12:13 - 06:42:13 -1410
Entiat 06:27:13 -22.7 Dark Up 24.9 200.1 Low 06:12:13 - 06:42:13 -1421
Wenatchee 06:27:13 -22.9 Dark Up 25.2 200.1 Low 06:12:13 - 06:42:13 -1433
Ellensburg 06:27:14 -23.2 Dark Up 25.6 199.9 Low 06:12:14 - 06:42:14 -1452
Yakima 06:27:14 -23.6 Dark Up 26.0 200.0 Low 06:12:14 - 06:42:14 -1475
Toppenish/White Swan 06:27:13 -23.8 Dark Up 26.1 200.2 Low 06:12:13 - 06:42:13 -1491
Goldendale 06:27:14 -24.2 Dark Up 26.8 199.8 Low 06:12:14 - 06:42:14 -1514
The Dalles 06:27:15 -24.3 Dark Up 27.1 199.5 Low 06:12:15 - 06:42:15 -1521
Pasco 06:27:08 -24.3 Dark Up 25.9 201.5 Low 06:12:08 - 06:42:08 -1524
PNWRO 06:27:06 -24.6 Dark Up 26.1 201.8 Low 06:12:06 - 06:42:06 -1543
Maupin 06:27:14 -24.7 Dark Up 27.4 199.7 Low 06:12:14 - 06:42:14 -1547
Sisters 06:27:16 -25.3 Dark Up 28.4 199.3 Low 06:12:16 - 06:42:16 -1590
Redmond 06:27:14 -25.5 Dark Up 28.3 199.7 Low 06:12:14 - 06:42:14 -1599
Bend 06:27:15 -25.6 Dark Up 28.5 199.6 Low 06:12:15 - 06:42:15 -1609
Oregon Observatory 06:27:15 -25.7 Dark Up 28.7 199.5 Low 06:12:15 - 06:42:15 -1617
La Pine/Gilchrist 06:27:15 -25.9 Dark Up 28.9 199.5 Low 06:12:15 - 06:42:15 -1628
North Lake 06:27:12 -26.5 Dark Up 29.2 200.2 Low 06:12:12 - 06:42:12 -1668
Paisley 06:27:11 -27.1 Dark Up 29.6 200.7 Low 06:12:11 - 06:42:11 -1710
Klamath Falls 06:27:15 -27.1 Dark Up 30.4 199.5 Up 06:12:15 - 06:42:15 -1714
Lakeview 06:27:10 -27.6 Dark Up 30.1 201.0 Up 06:12:10 - 06:42:10 -1747
Cedarville 06:27:08 -28.2 Dark Up 30.6 201.3 Up 06:12:08 - 06:42:08 -1793
Fall River/Burney 06:27:13 -28.2 Dark Up 31.4 200.1 Up 06:12:13 - 06:42:13 -1798
Susanville 06:27:09 -29.0 Dark Up 31.8 201.0 Up 06:12:09 - 06:42:09 -1856
Greenville 06:27:10 -29.2 Dark Up 32.1 200.8 Up 06:12:10 - 06:42:10 -1868
Gimple 06:27:11 -29.2 Dark Up 32.1 200.9 Up 06:12:11 - 06:42:11 -1870
Quincy 06:27:11 -29.4 Dark Up 32.3 200.8 Up 06:12:11 - 06:42:11 -1882
Portola 06:27:09 -29.6 Dark Up 32.3 201.4 Up 06:12:09 - 06:42:09 -1901
Reno 06:27:05 -30.1 Dark Up 32.4 202.1 Up 06:12:05 - 06:42:05 -1934
Carson City 06:27:05 -30.4 Dark Up 32.7 202.3 Up 06:12:05 - 06:42:05 -1959
Gardnerville 06:27:05 -30.7 Dark Up 32.9 202.4 Up 06:12:05 - 06:42:05 -1977
Yerington 06:27:02 -30.8 Dark Up 32.7 203.0 Up 06:12:02 - 06:42:02 -1987
Hawthorne 06:26:59 -31.4 Dark Up 33.0 203.7 Up 06:11:59 - 06:41:59 -2031
Lee Vining 06:27:01 -31.8 Dark Up 33.6 203.3 Up 06:12:01 - 06:42:01 -2059
Tonopah 06:26:53 -32.3 Dark Up 32.9 205.3 Up 06:11:53 - 06:41:53 -2097
Bishop 06:26:58 -32.5 Dark Up 33.9 204.2 Up 06:11:58 - 06:41:58 -2119
Beatty 06:26:50 -33.5 Dark Up 33.8 206.1 Up 06:11:50 - 06:41:50 -2192
CPSLO 06:27:07 -33.5 Dark Up 36.5 202.3 Up 06:12:07 - 06:42:07 -2216
Indian Springs 06:26:45 -34.2 Dark Up 33.7 207.3 Up 06:11:45 - 06:41:45 -2242
Niwot 06:26:06 -33.3 Dark Up 26.4 216.7 Low 06:11:06 - 06:41:06 -2247
SwRI 06:26:05 -33.4 Dark Up 26.6 216.6 Low 06:11:05 - 06:41:05 -2253
Henderson 06:26:41 -34.9 Dark Up 33.9 208.2 Up 06:11:41 - 06:41:41 -2299
Searchlight/Boulder City 06:26:41 -35.4 Dark Up 34.4 208.5 Up 06:11:41 - 06:41:41 -2344
Wildwood 06:26:58 -35.4 Dark Up 37.0 205.0 Up 06:11:58 - 06:41:58 -2356
Patrick 06:26:37 -35.8 Dark Up 34.1 209.6 Up 06:11:37 - 06:41:37 -2374
Laughlin/Bullhead City 06:26:39 -35.8 Dark Up 34.6 208.9 Up 06:11:39 - 06:41:39 -2375
Kingman/Dolan Springs 06:26:37 -35.9 Dark Up 34.3 209.5 Up 06:11:37 - 06:41:37 -2386
Mohave Valley 06:26:39 -36.1 Dark Up 34.8 209.0 Up 06:11:39 - 06:41:39 -2396
DCO 06:26:33 -36.3 Dark Up 34.0 210.4 Up 06:11:33 - 06:41:33 -2416
Idyllwild 06:26:48 -36.4 Dark Up 36.6 207.1 Up 06:11:48 - 06:41:48 -2430
Lake Havasu City 06:26:39 -36.5 Dark Up 35.0 209.4 Up 06:11:39 - 06:41:39 -2433
Parker 06:26:37 -36.8 Dark Up 35.3 209.6 Up 06:11:37 - 06:41:37 -2461
Blythe 06:26:39 -37.2 Dark Up 35.9 209.5 Up 06:11:39 - 06:41:39 -2494
Calipatria 06:26:42 -37.4 Dark Up 36.7 208.6 Up 06:11:42 - 06:41:42 -2509
George/Scottsdale 06:26:26 -38.0 Dark Up 34.7 212.3 Up 06:11:26 - 06:41:26 -2557
Yuma 06:26:39 -38.1 Dark Up 36.7 209.8 Up 06:11:39 - 06:41:39 -2566

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 06:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 28.45  27
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 2019/10/12 02:39:46 UT

Marc W. Buie, Southwest Research Institute

RECON