RECON: TNO occultation with 523716

Event between (523716) 14KW101 and star GA0920:17809714 with event index number of 2375167

Geocentric closest approach at 2027/08/12 06:51:24 UTC

J2000 position of star is 21:28:42.5 +02:28:00
Equinox of date position of star is 21:29:55.2 +02:34:19
Stellar brightness G=13.2, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 63 degrees from the moon. Moon is 79% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 39.4 AU from the Sun and 38.4 AU from the Earth.
Apparent velocity is 24.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 89 seconds.
The 1-sigma cross-track error in the shadow position is 1682 km.
The sky-plane scale is 27878.4 km/arcsec.

The object has an absolute magnitude Hv=6.0
Diameter=371.5 km assuming a 5% albedo -- 15.6 sec chord
Diameter=151.7 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523716, (2027/08/12 06:52UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:10.1 -29:28:30  1.2 38.50  69
Tarazed        19:47:34.3 +10:40:57  2.7 26.69  49
25 Aqr         21:40:57.2 +02:22:09  6.5  2.72  66
PPM 171839     21:31:38.8 +02:34:40  8.4  0.38  64
PPM 171785     21:29:35.6 +02:39:05 11.4  0.14  63
523716         21:30:06.4 +02:35:18 13.2        64
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 22.4 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 06:51:14 -22.3 Dark Up 39.1 154.9 Up 06:43:21 - 06:59:07 12223
Victoria 06:51:28 -23.6 Dark Up 40.2 150.4 Up 06:43:35 - 06:59:21 12161
Peachland 06:51:15 -23.3 Dark Up 40.1 155.3 Up 06:43:22 - 06:59:08 12152
Kelowna 06:51:14 -23.2 Dark Up 40.1 155.7 Up 06:43:21 - 06:59:07 12152
Summerland 06:51:15 -23.4 Dark Up 40.3 155.4 Up 06:43:22 - 06:59:08 12141
Penticton 06:51:15 -23.5 Dark Up 40.4 155.5 Up 06:43:22 - 06:59:08 12134
Oliver 06:51:16 -23.9 Dark Up 40.7 155.4 Up 06:43:23 - 06:59:09 12112
Anarchist Mountain Observatory 06:51:16 -24.1 Dark Up 40.9 155.6 Up 06:43:23 - 06:59:09 12097
Okanogan 06:51:18 -24.6 Dark Up 41.4 155.1 Up 06:43:25 - 06:59:11 12060
Brewster 06:51:19 -24.8 Dark Up 41.6 154.7 Up 06:43:26 - 06:59:12 12048
Manson/Chelan 06:51:21 -24.9 Dark Up 41.7 154.2 Up 06:43:28 - 06:59:14 12043
Wenatchee 06:51:22 -25.4 Dark Up 42.1 153.8 Up 06:43:29 - 06:59:15 12016
Ellensburg 06:51:22 -25.7 Dark Up 42.4 153.3 Up 06:43:29 - 06:59:15 11995
Sleaford 06:50:35 -22.8 Dark Down 40.2 173.5 Up 06:42:42 - 06:58:28 11981
Yakima 06:51:24 -26.1 Dark Up 42.8 153.1 Up 06:43:31 - 06:59:17 11968
Toppenish/White Swan 06:51:24 -26.3 Dark Up 43.0 153.3 Up 06:43:31 - 06:59:17 11950
The Dalles 06:51:28 -26.8 Dark Up 43.4 151.9 Up 06:43:35 - 06:59:21 11917
PNWRO 06:51:21 -27.0 Dark Up 43.8 155.1 Up 06:43:28 - 06:59:14 11887
Maupin 06:51:28 -27.3 Dark Up 43.9 151.9 Up 06:43:35 - 06:59:21 11886
Sisters 06:51:32 -28.0 Dark Up 44.5 150.8 Up 06:43:39 - 06:59:25 11839
Bend 06:51:32 -28.2 Dark Up 44.8 151.1 Up 06:43:39 - 06:59:25 11816
Oregon Observatory 06:51:31 -28.4 Dark Up 44.9 150.8 Up 06:43:38 - 06:59:24 11807
Chiloquin 06:51:36 -29.5 Dark Up 45.9 149.6 Up 06:43:43 - 06:59:29 11725
Klamath Falls 06:51:37 -29.8 Dark Up 46.2 149.6 Up 06:43:44 - 06:59:30 11698
Cedarville 06:51:33 -30.9 Dark Up 47.4 151.4 Up 06:43:40 - 06:59:26 11605
Fall River/Burney 06:51:36 -31.0 Dark Up 47.4 149.4 Up 06:43:43 - 06:59:29 11602
Greenville 06:51:38 -32.0 Dark Up 48.3 149.5 Up 06:43:45 - 06:59:31 11523
Gimple 06:51:39 -32.0 Dark Up 48.3 149.7 Up 06:43:46 - 06:59:32 11520
Quincy 06:51:39 -32.2 Dark Up 48.5 149.4 Up 06:43:46 - 06:59:32 11507
Portola 06:51:38 -32.4 Dark Up 48.8 150.0 Up 06:43:45 - 06:59:31 11485
Reno 06:51:36 -32.9 Dark Up 49.3 150.8 Up 06:43:43 - 06:59:29 11447
Carson City 06:51:36 -33.2 Dark Up 49.6 150.6 Up 06:43:43 - 06:59:29 11418
Gardnerville 06:51:36 -33.4 Dark Up 49.8 150.5 Up 06:43:43 - 06:59:29 11399
Yerington 06:51:36 -33.6 Dark Up 50.0 151.4 Up 06:43:43 - 06:59:29 11386
Hawthorne 06:51:35 -34.1 Dark Up 50.6 151.9 Up 06:43:42 - 06:59:28 11335
Lee Vining 06:51:38 -34.5 Dark Up 50.9 150.9 Up 06:43:45 - 06:59:31 11305
Bishop 06:51:37 -35.3 Dark Up 51.7 151.6 Up 06:43:44 - 06:59:30 11236
Beatty 06:51:32 -36.2 Dark Up 52.7 153.8 Up 06:43:39 - 06:59:25 11152
Dunrhomin 06:50:49 -34.6 Dark Up 52.0 173.3 Up 06:42:56 - 06:58:42 11091
Nikitin 06:50:49 -34.8 Dark Up 52.2 173.2 Up 06:42:56 - 06:58:42 11076
CU-SBO 06:50:49 -34.9 Dark Up 52.3 173.1 Up 06:42:56 - 06:58:42 11073
Wildwood 06:51:44 -38.3 Dark Up 54.5 149.2 Up 06:43:51 - 06:59:37 10976
Laughlin/Bullhead City 06:51:28 -38.3 Dark Up 55.0 156.2 Up 06:43:35 - 06:59:21 10945
Patrick 06:51:25 -38.2 Dark Up 55.0 157.5 Up 06:43:32 - 06:59:18 10944
Idyllwild 06:51:38 -39.2 Dark Up 55.6 151.9 Up 06:43:45 - 06:59:31 10890
Lake Havasu City 06:51:29 -39.0 Dark Up 55.7 156.3 Up 06:43:36 - 06:59:22 10881
Calipatria 06:51:35 -40.1 Dark Up 56.5 153.4 Up 06:43:42 - 06:59:28 10801
George/Scottsdale 06:51:21 -40.3 Dark Up 57.2 160.0 Up 06:43:28 - 06:59:14 10740
Yuma 06:51:33 -40.7 Dark Up 57.3 154.6 Up 06:43:40 - 06:59:26 10737

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 523716, (2027/08/12 06:52UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.7 -29:37:24  1.2 38.50  69
Tarazed        19:46:15.6 +10:36:48  2.7 26.69  49
25 Aqr         21:39:33.2 +02:14:35  6.5  2.72  66
PPM 171839     21:30:14.9 +02:27:20  8.4  0.38  64
PPM 171785     21:28:11.8 +02:31:48 11.4  0.14  63
523716         21:28:42.5 +02:28:00 13.2        63
Positions are for J2000

Event circumstances last updated at 2023/11/26 04:27:21 UT

Marc W. Buie, Southwest Research Institute

RECON