RECON: TNO occultation with 50000

Event between (50000) Quaoar and star GA0740:19133097 with event index number of 2325839

Geocentric closest approach at 2023/06/21 10:15:14 UTC

J2000 position of star is 18:30:50.1 -15:03:31
Equinox of date position of star is 18:32:08.4 -15:02:29
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 149 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=18.7

[RECON map]
TNO is 42.7 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 84 seconds.
The 1-sigma cross-track error in the shadow position is 1531 km.
The sky-plane scale is 30256.5 km/arcsec.

The TNO has an absolute magnitude Hv=2.4
Diameter=1905.5 km assuming a 5% albedo -- 80.9 sec chord
Diameter=777.9 km assuming a 30% albedo -- 33.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 50000, (2023/06/21 10:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.0 -26:28:55  0.9 30.48 124
Nunki          18:56:43.1 -26:15:56  2.0 12.60 156
PPM 234686     18:34:03.7 -14:50:48  5.1  0.49 149
PPM 234662     18:33:11.0 -15:09:52  7.8  0.27 149
PPM 234639     18:32:15.3 -14:54:28  9.3  0.13 149
50000          18:32:10.7 -15:02:27 16.4       149
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 22.9 km RECON observability=0.6 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 10:13:59 -10.5 NT Down 20.8 205.7 Low 10:06:28 - 10:21:30 11391
Kelowna 10:13:56 -10.9 NT Down 21.3 206.7 Low 10:06:25 - 10:21:27 11342
Peachland 10:13:56 -11.1 NT Down 21.4 206.4 Low 10:06:25 - 10:21:27 11339
Summerland 10:13:56 -11.2 NT Down 21.5 206.5 Low 10:06:25 - 10:21:27 11331
Penticton 10:13:56 -11.2 NT Down 21.6 206.6 Low 10:06:25 - 10:21:27 11326
Victoria 10:14:05 -13.3 AT Down 23.5 203.0 Low 10:06:34 - 10:21:36 11311
Oliver 10:13:55 -11.5 NT Down 21.9 206.7 Low 10:06:24 - 10:21:26 11308
Sleaford 10:13:27 -4.1 CT Down 14.8 219.0 Really Low 10:05:56 - 10:20:58 11299
Anarchist Mountain Observatory 10:13:55 -11.6 NT Down 22.0 206.9 Low 10:06:24 - 10:21:26 11298
Tonasket 10:13:55 -11.9 NT Down 22.3 206.9 Low 10:06:24 - 10:21:26 11282
Okanogan 10:13:54 -12.2 AT Down 22.6 206.8 Low 10:06:23 - 10:21:25 11266
Brewster 10:13:54 -12.5 AT Down 22.9 206.7 Low 10:06:23 - 10:21:25 11253
Manson/Chelan 10:13:55 -12.8 AT Down 23.2 206.3 Low 10:06:24 - 10:21:26 11246
Wenatchee 10:13:55 -13.3 AT Down 23.7 206.3 Low 10:06:24 - 10:21:26 11222
Ellensburg 10:13:55 -13.7 AT Down 24.1 206.1 Low 10:06:24 - 10:21:26 11202
Yakima 10:13:55 -14.1 AT Down 24.5 206.2 Low 10:06:24 - 10:21:26 11180
Toppenish/White Swan 10:13:54 -14.2 AT Down 24.7 206.4 Low 10:06:23 - 10:21:25 11166
Goldendale 10:13:55 -14.8 AT Down 25.3 206.1 Low 10:06:24 - 10:21:26 11139
The Dalles 10:13:55 -15.1 AT Down 25.6 205.7 Low 10:06:24 - 10:21:26 11130
PNWRO 10:13:49 -14.0 AT Down 24.5 208.0 Low 10:06:18 - 10:21:20 11129
Maupin 10:13:55 -15.5 AT Down 25.9 205.9 Low 10:06:24 - 10:21:26 11105
Sisters 10:13:55 -16.4 AT Down 26.9 205.6 Low 10:06:24 - 10:21:26 11059
Bend 10:13:53 -16.5 AT Down 27.0 205.9 Low 10:06:22 - 10:21:24 11042
Oregon Observatory 10:13:53 -16.7 AT Down 27.2 205.8 Low 10:06:22 - 10:21:24 11033
North Lake 10:13:52 -17.1 AT Down 27.6 206.5 Low 10:06:21 - 10:21:23 10989
Chiloquin 10:13:53 -18.0 Dark Down 28.5 205.7 Low 10:06:22 - 10:21:24 10957
Klamath Falls 10:13:52 -18.3 Dark Down 28.8 205.9 Low 10:06:21 - 10:21:23 10935
Lakeview 10:13:49 -17.8 AT Down 28.4 207.4 Low 10:06:18 - 10:21:20 10918
Cedarville 10:13:47 -18.3 Dark Down 28.9 207.7 Low 10:06:16 - 10:21:18 10874
Fall River/Burney 10:13:50 -19.1 Dark Down 29.7 206.6 Low 10:06:19 - 10:21:21 10856
Susanville 10:13:47 -19.4 Dark Down 30.1 207.5 Up 10:06:16 - 10:21:18 10807
Greenville 10:13:48 -19.8 Dark Down 30.4 207.3 Up 10:06:17 - 10:21:19 10792
Gimple 10:13:48 -19.7 Dark Down 30.4 207.4 Up 10:06:17 - 10:21:19 10791
Quincy 10:13:48 -19.9 Dark Down 30.6 207.3 Up 10:06:17 - 10:21:19 10779
Portola 10:13:47 -19.8 Dark Down 30.5 207.8 Up 10:06:16 - 10:21:18 10766
Reno 10:13:43 -19.8 Dark Down 30.5 208.6 Up 10:06:12 - 10:21:14 10740
Carson City 10:13:44 -20.1 Dark Down 30.8 208.7 Up 10:06:13 - 10:21:15 10716
Gardnerville 10:13:43 -20.3 Dark Down 31.0 208.8 Up 10:06:12 - 10:21:14 10699
Yerington 10:13:41 -20.0 Dark Down 30.8 209.4 Up 10:06:10 - 10:21:12 10695
Hawthorne 10:13:40 -20.2 Dark Down 31.0 210.1 Up 10:06:09 - 10:21:11 10657
Lee Vining 10:13:40 -20.9 Dark Down 31.7 209.8 Up 10:06:09 - 10:21:11 10625
Tonopah 10:13:34 -19.9 Dark Down 30.8 211.7 Up 10:06:03 - 10:21:05 10607
Dunrhomin 10:13:03 -12.4 AT Down 23.5 222.3 Low 10:05:32 - 10:20:34 10585
Bishop 10:13:36 -21.0 Dark Down 31.9 210.7 Up 10:06:05 - 10:21:07 10573
CU-SBO 10:13:01 -12.6 AT Down 23.7 222.3 Low 10:05:30 - 10:20:32 10570
Beatty 10:13:31 -20.7 Dark Down 31.6 212.5 Up 10:06:00 - 10:21:02 10519
Indian Springs 10:13:28 -20.5 Dark Down 31.4 213.7 Up 10:05:57 - 10:20:59 10481
Henderson 10:13:25 -20.6 Dark Down 31.5 214.5 Up 10:05:54 - 10:20:56 10433
Patrick 10:13:20 -20.5 Dark Down 31.5 215.8 Up 10:05:49 - 10:20:51 10371
Laughlin/Bullhead City 10:13:22 -21.1 Dark Down 32.1 215.2 Up 10:05:51 - 10:20:53 10363
Kingman/Dolan Springs 10:13:21 -20.8 Dark Down 31.8 215.7 Up 10:05:50 - 10:20:52 10358
Mohave Valley 10:13:22 -21.3 Dark Down 32.3 215.3 Up 10:05:51 - 10:20:53 10343
Wildwood 10:13:34 -23.8 Dark Down 34.8 211.6 Up 10:06:03 - 10:21:05 10338
Lake Havasu City 10:13:21 -21.5 Dark Down 32.5 215.7 Up 10:05:50 - 10:20:52 10309
Idyllwild 10:13:28 -23.2 Dark Down 34.2 213.6 Up 10:05:57 - 10:20:59 10286
Parker 10:13:20 -21.7 Dark Down 32.8 215.9 Up 10:05:49 - 10:20:51 10282
Calipatria 10:13:22 -23.2 Dark Down 34.2 215.1 Up 10:05:51 - 10:20:53 10222
George/Scottsdale 10:13:12 -20.8 Dark Down 31.9 218.4 Up 10:05:41 - 10:20:43 10214
Yuma 10:13:20 -23.0 Dark Down 34.1 216.1 Up 10:05:49 - 10:20:51 10176

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, (2023/06/21 10:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.48 124
Nunki          18:55:15.9 -26:17:49  2.0 12.60 156
PPM 234686     18:32:43.3 -14:51:57  5.1  0.49 149
PPM 234662     18:31:50.4 -15:10:58  7.8  0.27 149
PPM 234639     18:30:54.9 -14:55:32  9.3  0.13 149
50000          18:30:50.1 -15:03:31 16.4       149
Positions are for J2000

Event circumstances last updated at 2022/10/24 03:55:28 UT

Marc W. Buie, Southwest Research Institute

RECON