RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1100:10492766 with event index number of 1134572

Geocentric closest approach at 2021/09/04 09:11:08 UTC

J2000 position of star is 19:37:35.4 +20:11:40
Equinox of date position of star is 19:38:30.8 +20:14:35
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 134 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 27.4 AU from the Sun and 26.9 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
The 1-sigma error in the time of the event is 56 seconds.
The 1-sigma cross-track error in the shadow position is 1580 km.
The sky-plane scale is 19478.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.5 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2021/09/04 09:11UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:40.4 +38:48:18  0.0 22.73 111
Tarazed        19:47:17.4 +10:40:03  2.7  9.81 143
PPM 109474     19:41:25.2 +20:31:41  6.2  0.73 134
PPM 109337     19:37:34.6 +20:22:57  8.1  0.26 134
PPM 109350     19:38:01.8 +20:20:11  9.9  0.15 134
523700         19:38:32.4 +20:14:40 14.9       134
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 29.2 km RECON observability=1.0 and success probability=29.0%
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 09:07:23 -30.7 Dark Down 30.1 265.8 Up 09:02:11 - 09:12:34 -185
Kelowna 09:07:23 -31.1 Dark Down 30.2 265.9 Up 09:02:12 - 09:12:35 -225
Peachland 09:07:24 -31.2 Dark Down 30.4 265.8 Up 09:02:12 - 09:12:35 -234
Summerland 09:07:24 -31.4 Dark Down 30.4 265.9 Up 09:02:12 - 09:12:35 -251
Penticton 09:07:24 -31.4 Dark Down 30.3 266.1 Up 09:02:12 - 09:12:35 -259
Oliver 09:07:24 -31.7 Dark Down 30.3 266.3 Up 09:02:13 - 09:12:36 -298
Victoria 09:07:31 -33.1 Dark Down 32.9 263.6 Up 09:02:19 - 09:12:42 -314
Anarchist Mountain Observatory 09:07:24 -31.8 Dark Down 30.2 266.5 Up 09:02:13 - 09:12:36 -319
Tonasket 09:07:25 -32.1 Dark Down 30.3 266.6 Up 09:02:13 - 09:12:36 -351
Okanogan 09:07:25 -32.5 Dark Down 30.4 266.7 Up 09:02:14 - 09:12:37 -385
Brewster 09:07:26 -32.8 Dark Down 30.5 266.7 Up 09:02:14 - 09:12:37 -412
Manson/Chelan 09:07:27 -33.1 Dark Down 30.8 266.6 Up 09:02:15 - 09:12:38 -430
Wenatchee 09:07:27 -33.6 Dark Down 30.9 266.7 Up 09:02:16 - 09:12:39 -479
Ellensburg 09:07:28 -34.0 Dark Down 31.1 266.8 Up 09:02:16 - 09:12:39 -520
Yakima 09:07:28 -34.4 Dark Down 31.1 267.0 Up 09:02:17 - 09:12:40 -563
Toppenish/White Swan 09:07:28 -34.5 Dark Down 31.0 267.3 Up 09:02:17 - 09:12:40 -589
Pasco 09:07:27 -34.3 Dark Down 30.2 268.3 Up 09:02:15 - 09:12:38 -618
Goldendale 09:07:30 -35.2 Dark Down 31.3 267.3 Up 09:02:18 - 09:12:41 -642
PNWRO 09:07:27 -34.5 Dark Down 30.0 268.6 Up 09:02:15 - 09:12:38 -648
The Dalles 09:07:31 -35.5 Dark Down 31.6 267.2 Up 09:02:20 - 09:12:43 -661
Maupin 09:07:32 -35.8 Dark Down 31.6 267.5 Up 09:02:20 - 09:12:43 -707
Sisters 09:07:33 -36.8 Dark Down 31.9 267.7 Up 09:02:22 - 09:12:45 -793
Redmond 09:07:33 -36.7 Dark Down 31.6 268.0 Up 09:02:22 - 09:12:45 -801
Bend 09:07:34 -36.9 Dark Down 31.8 268.1 Up 09:02:22 - 09:12:45 -822
Oregon Observatory 09:07:34 -37.1 Dark Down 31.9 268.1 Up 09:02:22 - 09:12:45 -838
La Pine/Gilchrist 09:07:34 -37.3 Dark Down 31.9 268.2 Up 09:02:23 - 09:12:46 -859
North Lake 09:07:34 -37.6 Dark Down 31.5 268.8 Up 09:02:22 - 09:12:45 -914
Paisley 09:07:34 -38.0 Dark Down 31.2 269.4 Up 09:02:22 - 09:12:45 -977
Klamath Falls 09:07:36 -38.8 Dark Down 32.1 268.9 Up 09:02:25 - 09:12:48 -1007
Lakeview 09:07:34 -38.4 Dark Down 31.1 269.9 Up 09:02:23 - 09:12:46 -1033
Cedarville 09:07:35 -39.0 Dark Down 30.9 270.4 Up 09:02:24 - 09:12:47 -1104
Fall River/Burney 09:07:38 -39.8 Dark Down 31.9 269.9 Up 09:02:26 - 09:12:49 -1136
Susanville 09:07:38 -40.2 Dark Down 31.3 270.7 Up 09:02:26 - 09:12:49 -1213
Greenville 09:07:39 -40.5 Dark Down 31.5 270.7 Up 09:02:27 - 09:12:50 -1237
Gimple 09:07:38 -40.5 Dark Down 31.4 270.8 Up 09:02:27 - 09:12:50 -1238
Quincy 09:07:39 -40.7 Dark Down 31.5 270.9 Up 09:02:27 - 09:12:50 -1258
Portola 09:07:39 -40.7 Dark Down 31.1 271.2 Up 09:02:27 - 09:12:50 -1278
Reno 09:07:38 -40.7 Dark Down 30.6 271.8 Up 09:02:26 - 09:12:49 -1316
Dunrhomin 09:07:14 -34.3 Dark Down 19.6 280.3 Really Low 09:02:03 - 09:12:26 -1317
Carson City 09:07:38 -41.1 Dark Down 30.6 272.0 Up 09:02:27 - 09:12:50 -1353
Gardnerville 09:07:39 -41.3 Dark Down 30.6 272.2 Up 09:02:28 - 09:12:51 -1379
Yerington 09:07:38 -41.0 Dark Down 30.1 272.5 Up 09:02:26 - 09:12:49 -1382
Hawthorne 09:07:37 -41.3 Dark Down 29.7 273.1 Low 09:02:26 - 09:12:49 -1437
Lee Vining 09:07:39 -42.0 Dark Down 30.0 273.1 Up 09:02:27 - 09:12:50 -1489
Tonopah 09:07:36 -41.2 Dark Down 28.5 274.2 Low 09:02:24 - 09:12:47 -1502
Bishop 09:07:38 -42.3 Dark Down 29.4 273.9 Low 09:02:27 - 09:12:50 -1559
Beatty 09:07:37 -42.1 Dark Down 28.1 275.1 Low 09:02:26 - 09:12:49 -1626
Indian Springs 09:07:36 -42.0 Dark Down 27.2 275.9 Low 09:02:24 - 09:12:47 -1670
Henderson 09:07:36 -42.1 Dark Down 26.6 276.5 Low 09:02:24 - 09:12:47 -1731
CPSLO 09:07:47 -44.9 Dark Down 31.1 273.9 Up 09:02:35 - 09:12:58 -1734
Patrick 09:07:35 -42.2 Dark Down 25.6 277.4 Low 09:02:23 - 09:12:46 -1803
Laughlin/Bullhead City 09:07:37 -42.7 Dark Down 26.1 277.2 Low 09:02:26 - 09:12:49 -1822
Kingman/Dolan Springs 09:07:36 -42.5 Dark Down 25.7 277.4 Low 09:02:24 - 09:12:47 -1824
Mohave Valley 09:07:37 -43.0 Dark Down 26.1 277.3 Low 09:02:26 - 09:12:49 -1850
Wildwood 09:07:46 -45.3 Dark Down 29.3 275.6 Low 09:02:35 - 09:12:58 -1886
Lake Havasu City 09:07:37 -43.2 Dark Down 25.8 277.6 Low 09:02:26 - 09:12:49 -1892
Parker 09:07:38 -43.5 Dark Down 25.8 277.8 Low 09:02:26 - 09:12:49 -1927
Idyllwild 09:07:43 -44.8 Dark Down 27.7 276.8 Low 09:02:31 - 09:12:54 -1946
Blythe 09:07:40 -44.0 Dark Down 25.9 277.9 Low 09:02:28 - 09:12:51 -1977
George/Scottsdale 09:07:36 -42.7 Dark Down 23.7 279.2 Low 09:02:24 - 09:12:47 -1986
Calipatria 09:07:42 -44.9 Dark Down 26.6 277.7 Low 09:02:30 - 09:12:53 -2018
Yuma 09:07:41 -44.8 Dark Down 25.8 278.3 Low 09:02:30 - 09:12:53 -2069

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 523700, (2021/09/04 09:11UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 22.73 111
Tarazed        19:46:15.6 +10:36:48  2.7  9.81 143
PPM 109474     19:40:28.3 +20:28:36  6.2  0.73 134
PPM 109337     19:36:37.7 +20:19:58  8.1  0.26 134
PPM 109350     19:37:04.9 +20:17:12  9.9  0.15 134
523700         19:37:35.4 +20:11:40 14.9       134
Positions are for J2000

Event circumstances last updated at 2021/01/25 21:13:46 UT

Marc W. Buie, Southwest Research Institute

RECON