RECON: TNO occultation with 523673

Event between (523673) 13MZ11 and star GA0920:00067853 with event index number of 2625559

Geocentric closest approach at 2027/09/01 07:37:07 UTC

J2000 position of star is 00:44:45.9 +03:32:04
Equinox of date position of star is 00:46:00.2 +03:39:56
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 155 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=20.5

[RECON map]
Object is 17.3 AU from the Sun and 16.5 AU from the Earth.
Apparent velocity is 16.9 km/sec on the sky relative to the star, or, 5.1 arcsec/hr.
The 1-sigma error in the time of the event is 70 seconds.
The 1-sigma cross-track error in the shadow position is 951 km.
The sky-plane scale is 11963.7 km/arcsec.

The object has an absolute magnitude Hv=8.0
Diameter=145.9 km assuming a 5% albedo -- 8.9 sec chord
Diameter=59.6 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523673, (2027/09/01 07:41UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:10.3 -29:28:29  1.2 41.92 153
Algenib        00:14:39.9 +15:20:14  2.8 14.00 156
PPM 143688     00:38:56.1 +03:17:13  6.4  1.85 157
PPM 143794     00:43:48.8 +04:19:04  7.9  0.87 155
PPM 143839     00:46:17.3 +03:51:28 10.0  0.17 155
PPM 143844     00:46:26.9 +03:44:53 10.6  0.09 155
523673         00:46:11.4 +03:41:08 14.8       154
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 21.2 km RECON observability=1.0 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 07:37:46 -30.8 Dark Down 33.6 134.0 Up 07:31:27 - 07:44:05 8423
Victoria 07:38:04 -32.6 Dark Down 33.6 129.8 Up 07:31:45 - 07:44:23 8379
Peachland 07:37:48 -31.7 Dark Down 34.5 134.2 Up 07:31:29 - 07:44:07 8361
Kelowna 07:37:46 -31.7 Dark Down 34.6 134.6 Up 07:31:27 - 07:44:05 8360
Summerland 07:37:48 -31.9 Dark Down 34.7 134.2 Up 07:31:29 - 07:44:07 8351
Penticton 07:37:48 -32.0 Dark Down 34.8 134.3 Up 07:31:29 - 07:44:07 8345
Oliver 07:37:50 -32.3 Dark Down 35.0 134.2 Up 07:31:31 - 07:44:09 8326
Anarchist Mountain Observatory 07:37:50 -32.5 Dark Down 35.3 134.3 Up 07:31:31 - 07:44:09 8312
Okanogan 07:37:53 -33.1 Dark Down 35.6 133.7 Up 07:31:34 - 07:44:12 8281
Brewster 07:37:55 -33.4 Dark Down 35.7 133.4 Up 07:31:36 - 07:44:14 8271
Manson/Chelan 07:37:57 -33.6 Dark Down 35.7 132.9 Up 07:31:38 - 07:44:16 8268
Wenatchee 07:38:00 -34.0 Dark Down 35.9 132.5 Up 07:31:41 - 07:44:19 8245
Ellensburg 07:38:03 -34.4 Dark Down 36.1 132.0 Up 07:31:44 - 07:44:22 8227
Yakima 07:38:04 -34.8 Dark Down 36.3 131.8 Up 07:31:45 - 07:44:23 8204
Toppenish/White Swan 07:38:04 -35.1 Dark Down 36.6 131.9 Up 07:31:45 - 07:44:23 8187
Sleaford 07:36:53 -29.2 Dark Down 37.9 150.8 Up 07:30:34 - 07:43:12 8162
The Dalles 07:38:10 -35.8 Dark Down 36.7 130.6 Up 07:31:51 - 07:44:29 8161
Maupin 07:38:12 -36.2 Dark Down 37.0 130.5 Up 07:31:53 - 07:44:31 8134
PNWRO 07:38:02 -35.5 Dark Down 37.6 133.3 Up 07:31:43 - 07:44:21 8129
Sisters 07:38:17 -37.0 Dark Down 37.3 129.5 Up 07:31:58 - 07:44:36 8093
Bend 07:38:18 -37.3 Dark Down 37.6 129.6 Up 07:31:59 - 07:44:37 8072
Oregon Observatory 07:38:19 -37.4 Dark Down 37.7 129.4 Up 07:32:00 - 07:44:38 8065
Chiloquin 07:38:26 -38.7 Dark Down 38.3 128.2 Up 07:32:07 - 07:44:45 7994
Klamath Falls 07:38:27 -39.0 Dark Down 38.5 128.0 Up 07:32:08 - 07:44:46 7970
Fall River/Burney 07:38:31 -40.2 Dark Down 39.5 127.7 Up 07:32:12 - 07:44:50 7883
Cedarville 07:38:25 -39.9 Dark Down 39.9 129.3 Up 07:32:06 - 07:44:44 7882
Greenville 07:38:33 -41.2 Dark Down 40.3 127.6 Up 07:32:14 - 07:44:52 7811
Gimple 07:38:33 -41.2 Dark Down 40.4 127.7 Up 07:32:14 - 07:44:52 7808
Quincy 07:38:34 -41.4 Dark Down 40.4 127.5 Up 07:32:15 - 07:44:53 7797
Portola 07:38:33 -41.6 Dark Down 40.8 127.9 Up 07:32:14 - 07:44:52 7776
Reno 07:38:31 -41.9 Dark Down 41.4 128.4 Up 07:32:12 - 07:44:50 7740
Carson City 07:38:33 -42.2 Dark Down 41.6 128.1 Up 07:32:14 - 07:44:52 7714
Gardnerville 07:38:34 -42.5 Dark Down 41.8 128.0 Up 07:32:15 - 07:44:53 7696
Yerington 07:38:31 -42.5 Dark Down 42.1 128.7 Up 07:32:12 - 07:44:50 7683
Hawthorne 07:38:32 -43.0 Dark Down 42.7 128.9 Up 07:32:13 - 07:44:51 7636
Lee Vining 07:38:36 -43.5 Dark Down 42.8 128.0 Up 07:32:17 - 07:44:55 7610
Bishop 07:38:35 -44.2 Dark Down 43.6 128.3 Up 07:32:16 - 07:44:54 7546
Beatty 07:38:31 -44.7 Dark Down 44.9 129.7 Up 07:32:12 - 07:44:50 7465
Dunrhomin 07:37:31 -40.7 Dark Down 48.4 146.2 Up 07:31:12 - 07:43:50 7369
Nikitin 07:37:31 -40.9 Dark Down 48.5 146.1 Up 07:31:12 - 07:43:50 7356
CU-SBO 07:37:32 -41.0 Dark Down 48.5 145.9 Up 07:31:13 - 07:43:51 7354
Wildwood 07:38:49 -47.4 Dark Down 45.5 125.6 Up 07:32:30 - 07:45:08 7309
Laughlin/Bullhead City 07:38:29 -46.5 Dark Down 47.4 130.8 Up 07:32:10 - 07:44:48 7270
Patrick 07:38:25 -46.3 Dark Down 47.6 131.8 Up 07:32:06 - 07:44:44 7268
Idyllwild 07:38:43 -47.9 Dark Down 46.9 127.3 Up 07:32:24 - 07:45:02 7226
Lake Havasu City 07:38:30 -47.2 Dark Down 48.0 130.6 Up 07:32:11 - 07:44:49 7211
Calipatria 07:38:40 -48.5 Dark Down 48.1 128.1 Up 07:32:21 - 07:44:59 7141
Yuma 07:38:38 -49.0 Dark Down 48.9 128.7 Up 07:32:19 - 07:44:57 7079
George/Scottsdale 07:38:22 -47.9 Dark Down 50.0 132.8 Up 07:32:03 - 07:44:41 7074

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 523673, (2027/09/01 07:41UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 41.92 153
Algenib        00:13:14.2 +15:11:01  2.8 14.00 156
PPM 143688     00:37:30.6 +03:08:06  6.4  1.85 157
PPM 143794     00:42:23.3 +04:09:59  7.9  0.87 155
PPM 143839     00:44:51.7 +03:42:24 10.0  0.17 155
PPM 143844     00:45:01.3 +03:35:50 10.6  0.09 155
523673         00:44:45.9 +03:32:04 14.8       155
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:38:08 UT

Marc W. Buie, Southwest Research Institute

RECON