RECON: TNO occultation with 523719

Event between (523719) 14LM28 and star GA1440:05087556 with event index number of 2292486

Geocentric closest approach at 2023/07/02 07:17:41 UTC

J2000 position of star is 17:51:08.0 +55:11:19
Equinox of date position of star is 17:51:33.7 +55:11:02
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 83 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 18.7 AU from the Sun and 18.5 AU from the Earth.
The TNO is moving 25.3 km/sec on the sky relative to the star, or, 6.8 arcsec/hr.
The 1-sigma error in the time of the event is 110 seconds.
The 1-sigma cross-track error in the shadow position is 3969 km.
The sky-plane scale is 13409.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 2.5 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523719, (2023/07/02 07:18UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:44.1 +38:48:24  0.0 18.11  68
Etamin         17:57:09.2 +51:29:13  2.2  3.79  79
32Xi Dra       17:53:56.1 +56:52:10  3.8  1.72  84
PPM 036225     17:52:10.3 +56:06:57  7.3  0.94  84
PPM 036221     17:52:01.0 +55:14:14  9.4  0.08  83
523719         17:51:35.2 +55:11:01 15.5        83
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 28.8 km RECON observability=1.0 and success probability=13.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:16:59 -14.8 AT Up 80.3 294.7 Up 07:07:17 - 07:26:41 1740
Kamloops 07:17:36 -15.5 AT Up 85.4 350.4 Up 07:07:54 - 07:27:18 1379
Kelowna 07:17:33 -16.4 AT Up 84.5 346.7 Up 07:07:51 - 07:27:15 1297
Peachland 07:17:34 -16.5 AT Up 84.4 348.6 Up 07:07:52 - 07:27:16 1282
Summerland 07:17:34 -16.7 AT Up 84.3 348.4 Up 07:07:52 - 07:27:16 1266
Penticton 07:17:34 -16.7 AT Up 84.2 347.9 Up 07:07:52 - 07:27:16 1260
Oliver 07:17:33 -17.1 AT Up 83.9 348.6 Up 07:07:51 - 07:27:15 1221
Anarchist Mountain Observatory 07:17:33 -17.3 AT Up 83.7 347.9 Up 07:07:51 - 07:27:15 1204
Tonasket 07:17:33 -17.6 AT Up 83.4 348.8 Up 07:07:51 - 07:27:15 1170
Okanogan 07:17:33 -17.9 AT Up 83.1 350.0 Up 07:07:51 - 07:27:15 1132
Victoria 07:17:44 -17.2 AT Up 83.3 8.2 Up 07:08:02 - 07:27:26 1122
Brewster 07:17:34 -18.1 Dark Up 82.8 351.3 Up 07:07:52 - 07:27:16 1100
Manson/Chelan 07:17:34 -18.3 Dark Up 82.6 353.2 Up 07:07:52 - 07:27:16 1074
Wenatchee 07:17:35 -18.7 Dark Up 82.2 354.3 Up 07:07:53 - 07:27:17 1021
Ellensburg 07:17:35 -19.1 Dark Up 81.8 355.4 Up 07:07:53 - 07:27:17 973
Yakima 07:17:35 -19.5 Dark Up 81.4 355.7 Up 07:07:53 - 07:27:17 929
Toppenish/White Swan 07:17:34 -19.7 Dark Up 81.1 355.2 Up 07:07:52 - 07:27:16 907
PNWRO 07:17:30 -20.3 Dark Up 80.7 350.2 Up 07:07:48 - 07:27:12 880
Goldendale 07:17:36 -20.2 Dark Up 80.6 356.9 Up 07:07:54 - 07:27:18 843
The Dalles 07:17:37 -20.4 Dark Up 80.4 358.3 Up 07:07:55 - 07:27:19 816
Maupin 07:17:36 -20.8 Dark Up 80.0 358.0 Up 07:07:54 - 07:27:18 771
Sisters 07:17:37 -21.6 Dark Up 79.1 359.6 Up 07:07:55 - 07:27:19 671
Bend 07:17:36 -21.9 Dark Up 78.9 358.9 Up 07:07:54 - 07:27:18 647
Oregon Observatory 07:17:37 -22.0 Dark Up 78.7 359.3 Up 07:07:55 - 07:27:19 627
North Lake 07:17:35 -22.7 Dark Up 78.0 357.8 Up 07:07:53 - 07:27:17 562
Dunrhomin 07:16:43 -26.6 Dark Up 71.6 329.5 Up 07:07:01 - 07:26:25 518
CU-SBO 07:16:43 -26.9 Dark Up 71.4 330.0 Up 07:07:01 - 07:26:25 490
Chiloquin 07:17:37 -23.2 Dark Up 77.4 0.4 Up 07:07:55 - 07:27:19 481
Lakeview 07:17:32 -23.8 Dark Up 77.0 356.6 Up 07:07:50 - 07:27:14 452
Klamath Falls 07:17:37 -23.6 Dark Up 77.0 0.2 Up 07:07:55 - 07:27:19 445
Cedarville 07:17:32 -24.5 Dark Up 76.3 356.4 Up 07:07:50 - 07:27:14 383
Fall River/Burney 07:17:35 -24.8 Dark Up 75.9 359.3 Up 07:07:53 - 07:27:17 321
Susanville 07:17:33 -25.5 Dark Up 75.2 357.7 Up 07:07:51 - 07:27:15 260
Gimple 07:17:33 -25.8 Dark Up 74.9 358.2 Up 07:07:51 - 07:27:15 228
Greenville 07:17:34 -25.7 Dark Up 74.9 358.4 Up 07:07:52 - 07:27:16 228
Quincy 07:17:34 -25.9 Dark Up 74.7 358.4 Up 07:07:52 - 07:27:16 206
Portola 07:17:32 -26.1 Dark Up 74.6 357.4 Up 07:07:50 - 07:27:14 197
Reno 07:17:30 -26.5 Dark Up 74.3 356.1 Up 07:07:48 - 07:27:12 175
Carson City 07:17:29 -26.9 Dark Up 73.9 356.1 Up 07:07:47 - 07:27:11 137
Yerington 07:17:27 -27.1 Dark Up 73.7 354.9 Up 07:07:45 - 07:27:09 123
Gardnerville 07:17:29 -27.1 Dark Up 73.7 356.1 Up 07:07:47 - 07:27:11 112
Hawthorne 07:17:25 -27.7 Dark Up 73.2 354.0 Up 07:07:43 - 07:27:07 80
Tonopah 07:17:20 -28.3 Dark Up 72.6 351.5 Up 07:07:38 - 07:27:02 48
Lee Vining 07:17:26 -28.2 Dark Up 72.7 355.1 Up 07:07:44 - 07:27:08 14
Bishop 07:17:24 -28.9 Dark Up 72.0 354.0 Up 07:07:42 - 07:27:06 -40
Beatty 07:17:18 -29.5 Dark Up 71.4 351.3 Up 07:07:36 - 07:27:00 -67
Indian Springs 07:17:14 -30.0 Dark Up 71.0 349.6 Up 07:07:32 - 07:26:56 -85
Henderson 07:17:11 -30.6 Dark Up 70.3 348.7 Up 07:07:29 - 07:26:53 -129
Patrick 07:17:07 -31.3 Dark Up 69.5 347.4 Up 07:07:25 - 07:26:49 -175
Kingman/Dolan Springs 07:17:07 -31.5 Dark Up 69.3 347.8 Up 07:07:25 - 07:26:49 -201
Laughlin/Bullhead City 07:17:09 -31.5 Dark Up 69.4 348.6 Up 07:07:27 - 07:26:51 -212
Mohave Valley 07:17:09 -31.8 Dark Up 69.1 348.7 Up 07:07:27 - 07:26:51 -240
Lake Havasu City 07:17:08 -32.2 Dark Up 68.7 348.5 Up 07:07:26 - 07:26:50 -277
George/Scottsdale 07:16:59 -33.1 Dark Up 67.5 345.5 Up 07:07:17 - 07:26:41 -309
Parker 07:17:07 -32.5 Dark Up 68.4 348.7 Up 07:07:25 - 07:26:49 -312
Wildwood 07:17:23 -32.0 Dark Up 68.8 355.2 Up 07:07:41 - 07:27:05 -382
Idyllwild 07:17:16 -32.7 Dark Up 68.3 352.4 Up 07:07:34 - 07:26:58 -394
Calipatria 07:17:11 -33.4 Dark Up 67.5 350.9 Up 07:07:29 - 07:26:53 -437
Yuma 07:17:08 -33.9 Dark Up 67.0 349.8 Up 07:07:26 - 07:26:50 -466

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 523719, (2023/07/02 07:18UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 18.11  68
Etamin         17:56:36.3 +51:29:20  2.2  3.79  79
32Xi Dra       17:53:32.0 +56:52:23  3.8  1.72  84
PPM 036225     17:51:44.8 +56:07:13  7.3  0.94  84
PPM 036221     17:51:34.0 +55:14:31  9.4  0.08  83
523719         17:51:08.0 +55:11:19 15.5        83
Positions are for J2000

Event circumstances last updated at 2022/03/20 00:56:31 UT

Marc W. Buie, Southwest Research Institute

RECON