RECON: TNO occultation with 523743

Event between (523743) 14TA86 and star GA1060:00422219 with event index number of 2323589

Geocentric closest approach at 2027/10/06 04:46:50 UTC

J2000 position of star is 03:52:58.5 +17:00:19
Equinox of date position of star is 03:54:20.0 +17:04:29
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 151 degrees from the moon. Moon is 38% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 39.6 AU from the Sun and 38.9 AU from the Earth.
Apparent velocity is 15.8 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 220 seconds.
The 1-sigma cross-track error in the shadow position is 1497 km.
The sky-plane scale is 28190.8 km/arcsec.

The object has an absolute magnitude Hv=6.1
Diameter=368.1 km assuming a 5% albedo -- 23.4 sec chord
Diameter=150.3 km assuming a 30% albedo -- 9.6 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 

Star training set for 523743, (2027/10/06 04:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.0 +16:33:47  0.8 10.29 159
44Zet Per      03:55:53.1 +31:57:49  2.8 14.88 154
PPM 119433     03:54:45.5 +17:24:28  6.0  0.32 151
523743         03:54:33.5 +17:05:10 16.6       151
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 4.1 sigma about the mid-time.
The median site spacing is 10.3 km RECON observability=0.1 and success probability=31.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:49:16 -30.9 Dark Down 12.0 77.8 Really Low 04:34:16 - 05:04:16 338
Victoria 04:49:28 -30.4 Dark Down 9.6 75.2 Really Low 04:34:28 - 05:04:28 316
Peachland 04:49:23 -31.7 Dark Down 12.2 78.1 Really Low 04:34:23 - 05:04:23 293
Kelowna 04:49:22 -31.8 Dark Down 12.5 78.3 Really Low 04:34:22 - 05:04:22 291
Summerland 04:49:24 -31.9 Dark Down 12.3 78.1 Really Low 04:34:24 - 05:04:24 286
Penticton 04:49:24 -32.0 Dark Down 12.3 78.2 Really Low 04:34:24 - 05:04:24 281
Oliver 04:49:26 -32.2 Dark Down 12.3 78.1 Really Low 04:34:26 - 05:04:26 267
Anarchist Mountain Observatory 04:49:28 -32.4 Dark Down 12.4 78.2 Really Low 04:34:28 - 05:04:28 258
Okanogan 04:49:32 -32.6 Dark Down 12.1 77.9 Really Low 04:34:32 - 05:04:32 236
Brewster 04:49:33 -32.7 Dark Down 11.9 77.7 Really Low 04:34:33 - 05:04:33 229
Manson/Chelan 04:49:34 -32.6 Dark Down 11.6 77.4 Really Low 04:34:34 - 05:04:34 228
Wenatchee 04:49:37 -32.8 Dark Down 11.4 77.2 Really Low 04:34:37 - 05:04:37 212
Ellensburg 04:49:40 -32.9 Dark Down 11.2 77.0 Really Low 04:34:40 - 05:04:40 200
Yakima 04:49:42 -33.1 Dark Down 11.1 76.9 Really Low 04:34:42 - 05:04:42 183
Toppenish/White Swan 04:49:44 -33.3 Dark Down 11.2 77.0 Really Low 04:34:44 - 05:04:44 170
The Dalles 04:49:48 -33.3 Dark Up 10.5 76.3 Really Low 04:34:48 - 05:04:48 152
Maupin 04:49:51 -33.5 Dark Up 10.4 76.3 Really Low 04:34:51 - 05:04:51 132
PNWRO 04:49:47 -34.4 Dark Down 12.1 78.0 Really Low 04:34:47 - 05:04:47 122
Sisters 04:49:56 -33.7 Dark Up 9.9 75.8 Really Low 04:34:56 - 05:04:56 102
Bend 04:49:58 -34.0 Dark Up 10.0 76.0 Really Low 04:34:58 - 05:04:58 86
Sleaford 04:49:08 -36.5 Dark Down 21.1 89.2 Low 04:34:08 - 05:04:08 85
Oregon Observatory 04:49:59 -34.0 Dark Up 9.9 75.9 Really Low 04:34:59 - 05:04:59 81
Chiloquin 04:50:06 -34.4 Dark Up 9.3 75.4 Really Low 04:35:06 - 05:05:06 26
Klamath Falls 04:50:08 -34.6 Dark Up 9.3 75.4 Really Low 04:35:08 - 05:05:08 8
Fall River/Burney 04:50:16 -35.5 Dark Up 9.3 75.5 Really Low 04:35:16 - 05:05:16 -60
Cedarville 04:50:14 -36.0 Dark Up 10.3 76.3 Really Low 04:35:14 - 05:05:14 -62
Greenville 04:50:21 -36.2 Dark Up 9.4 75.6 Really Low 04:35:21 - 05:05:21 -118
Gimple 04:50:22 -36.3 Dark Up 9.5 75.7 Really Low 04:35:22 - 05:05:22 -120
Quincy 04:50:23 -36.3 Dark Up 9.4 75.6 Really Low 04:35:23 - 05:05:23 -129
Portola 04:50:24 -36.7 Dark Up 9.7 75.9 Really Low 04:35:24 - 05:05:24 -146
Reno 04:50:26 -37.3 Dark Up 10.1 76.2 Really Low 04:35:26 - 05:05:26 -176
Carson City 04:50:28 -37.5 Dark Up 10.1 76.2 Really Low 04:35:28 - 05:05:28 -196
Gardnerville 04:50:29 -37.6 Dark Up 10.0 76.2 Really Low 04:35:29 - 05:05:29 -210
Yerington 04:50:29 -38.0 Dark Up 10.5 76.5 Really Low 04:35:29 - 05:05:29 -222
Hawthorne 04:50:32 -38.6 Dark Up 10.8 76.8 Really Low 04:35:32 - 05:05:32 -261
Lee Vining 04:50:35 -38.5 Dark Up 10.3 76.4 Really Low 04:35:35 - 05:05:35 -280
Bishop 04:50:39 -39.4 Dark Up 10.7 76.7 Really Low 04:35:39 - 05:05:39 -333
Beatty 04:50:42 -40.7 Dark Up 11.9 77.6 Really Low 04:35:42 - 05:05:42 -402
Dunrhomin 04:50:21 -45.8 Dark Down 21.3 85.3 Low 04:35:21 - 05:05:21 -524
Wildwood 04:50:57 -40.8 Dark Up 9.9 76.1 Really Low 04:35:57 - 05:05:57 -528
Nikitin 04:50:22 -46.0 Dark Down 21.3 85.3 Low 04:35:22 - 05:05:22 -534
CU-SBO 04:50:22 -46.0 Dark Down 21.2 85.2 Low 04:35:22 - 05:05:22 -536
Laughlin/Bullhead City 04:50:53 -43.2 Dark Up 13.3 78.4 Really Low 04:35:53 - 05:05:53 -568
Patrick 04:50:52 -43.5 Dark Up 13.9 78.8 Really Low 04:35:52 - 05:05:52 -571
Idyllwild 04:51:00 -42.3 Dark Up 11.3 77.0 Really Low 04:36:00 - 05:06:00 -601
Lake Havasu City 04:50:56 -43.7 Dark Up 13.4 78.4 Really Low 04:35:56 - 05:05:56 -618
Calipatria 04:51:04 -43.5 Dark Up 12.2 77.5 Really Low 04:36:04 - 05:06:04 -674
Yuma 04:51:06 -44.4 Dark Up 12.8 77.8 Really Low 04:36:06 - 05:06:06 -727
George/Scottsdale 04:51:01 -45.9 Dark Up 15.3 79.5 Really Low 04:36:01 - 05:06:01 -739

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 523743, (2027/10/06 04:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 10.29 159
44Zet Per      03:54:07.9 +31:53:01  2.8 14.88 154
PPM 119433     03:53:10.2 +17:19:37  6.0  0.32 151
523743         03:52:58.5 +17:00:19 16.6       151
Positions are for J2000

Event circumstances last updated at 2023/10/26 02:16:27 UT

Marc W. Buie, Southwest Research Institute

RECON