RECON: TNO occultation with 523642

Event between (523642) 10SS43 and star GA1300:00393194 with event index number of 2382859

Geocentric closest approach at 2024/10/24 12:33:05 UTC

J2000 position of star is 01:20:28.6 +40:41:18
Equinox of date position of star is 01:21:48.0 +40:48:28
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 87 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 38.1 AU from the Sun and 37.3 AU from the Earth.
The TNO is moving 25.2 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 76 seconds.
The 1-sigma cross-track error in the shadow position is 1936 km.
The sky-plane scale is 27037.7 km/arcsec.

The TNO has an absolute magnitude Hv=5.7
Diameter=424.6 km assuming a 5% albedo -- 17.1 sec chord
Diameter=173.4 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523642, (2024/10/24 12:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:20.8 +16:33:26  0.8 48.43  55
57Gam1And      02:05:26.0 +42:26:51  2.3  8.29  79
PPM 044004     01:28:53.9 +41:13:45  6.5  1.38  85
PPM 043836     01:19:11.7 +41:08:38  8.3  0.61  87
PPM 043882     01:21:31.5 +40:46:32  9.9  0.08  87
523642         01:21:54.8 +40:49:04 16.7        86
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 20.4 km RECON observability=0.9 and success probability=2.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:29:47 -12.2 AT Up 28.4 300.8 Low 12:22:57 - 12:36:37 -4219
Kamloops 12:29:54 -21.2 Dark Up 35.8 292.9 Up 12:23:04 - 12:36:44 -4932
Kelowna 12:29:51 -20.8 Dark Up 34.9 293.9 Up 12:23:01 - 12:36:41 -4969
Peachland 12:29:51 -21.0 Dark Up 35.1 293.8 Up 12:23:01 - 12:36:41 -4990
Summerland 12:29:51 -20.9 Dark Up 34.9 294.0 Up 12:23:01 - 12:36:41 -5000
Penticton 12:29:51 -20.9 Dark Up 34.8 294.1 Up 12:23:01 - 12:36:41 -5001
Oliver 12:29:49 -20.9 Dark Up 34.7 294.3 Up 12:22:59 - 12:36:39 -5032
Anarchist Mountain Observatory 12:29:49 -20.8 Dark Up 34.5 294.5 Up 12:22:59 - 12:36:39 -5040
Dunrhomin 12:29:20 -10.7 NT Up 21.5 305.8 Low 12:22:30 - 12:36:10 -5105
Okanogan 12:29:48 -21.0 Dark Up 34.4 294.8 Up 12:22:58 - 12:36:38 -5106
CU-SBO 12:29:20 -10.7 NT Up 21.4 305.8 Low 12:22:30 - 12:36:10 -5130
Brewster 12:29:47 -21.2 Dark Up 34.4 294.8 Up 12:22:57 - 12:36:37 -5138
Manson/Chelan 12:29:48 -21.4 Dark Up 34.5 294.8 Up 12:22:58 - 12:36:38 -5172
Wenatchee 12:29:47 -21.6 Dark Up 34.4 295.0 Up 12:22:57 - 12:36:37 -5222
Victoria 12:29:53 -23.5 Dark Up 36.8 292.6 Up 12:23:03 - 12:36:43 -5244
Ellensburg 12:29:46 -21.8 Dark Up 34.4 295.1 Up 12:22:56 - 12:36:36 -5268
PNWRO 12:29:42 -20.7 Dark Up 33.0 296.6 Up 12:22:52 - 12:36:32 -5287
Yakima 12:29:45 -21.8 Dark Up 34.2 295.3 Up 12:22:55 - 12:36:35 -5305
Toppenish/White Swan 12:29:45 -21.7 Dark Up 34.0 295.6 Up 12:22:55 - 12:36:35 -5318
The Dalles 12:29:44 -22.4 Dark Up 34.2 295.6 Up 12:22:54 - 12:36:34 -5422
Maupin 12:29:44 -22.3 Dark Up 34.0 295.9 Up 12:22:54 - 12:36:34 -5456
Sisters 12:29:42 -22.8 Dark Up 33.9 296.2 Up 12:22:52 - 12:36:32 -5557
Bend 12:29:41 -22.6 Dark Up 33.6 296.5 Up 12:22:51 - 12:36:31 -5568
Oregon Observatory 12:29:41 -22.7 Dark Up 33.6 296.5 Up 12:22:51 - 12:36:31 -5589
Chiloquin 12:29:39 -23.1 Dark Up 33.3 297.1 Up 12:22:49 - 12:36:29 -5729
Cedarville 12:29:35 -22.0 Dark Up 31.7 298.4 Up 12:22:45 - 12:36:25 -5750
Klamath Falls 12:29:38 -23.1 Dark Up 33.1 297.3 Up 12:22:48 - 12:36:28 -5757
Fall River/Burney 12:29:36 -22.9 Dark Up 32.3 298.2 Up 12:22:46 - 12:36:26 -5850
Gimple 12:29:34 -22.6 Dark Up 31.5 298.9 Up 12:22:44 - 12:36:24 -5910
Greenville 12:29:34 -22.6 Dark Up 31.6 298.9 Up 12:22:44 - 12:36:24 -5913
Reno 12:29:31 -21.8 Dark Up 30.5 299.6 Up 12:22:41 - 12:36:21 -5916
Portola 12:29:33 -22.3 Dark Up 31.1 299.2 Up 12:22:43 - 12:36:23 -5922
Quincy 12:29:34 -22.7 Dark Up 31.5 299.0 Up 12:22:44 - 12:36:24 -5932
Yerington 12:29:30 -21.3 Dark Up 29.8 300.2 Low 12:22:40 - 12:36:20 -5935
Carson City 12:29:31 -21.8 Dark Up 30.3 299.8 Up 12:22:41 - 12:36:21 -5948
Hawthorne 12:29:29 -20.9 Dark Up 29.2 300.6 Low 12:22:39 - 12:36:19 -5952
Gardnerville 12:29:31 -21.8 Dark Up 30.2 300.0 Up 12:22:41 - 12:36:21 -5968
Patrick 12:29:19 -17.1 AT Up 24.4 303.8 Low 12:22:29 - 12:36:09 -5989
Beatty 12:29:24 -19.5 Dark Up 27.1 302.1 Low 12:22:34 - 12:36:14 -6007
Lee Vining 12:29:28 -21.3 Dark Up 29.3 300.7 Low 12:22:38 - 12:36:18 -6028
George/Scottsdale 12:29:15 -15.4 AT Up 22.1 305.1 Low 12:22:25 - 12:36:05 -6029
Bishop 12:29:26 -20.8 Dark Up 28.5 301.3 Low 12:22:36 - 12:36:16 -6047
Laughlin/Bullhead City 12:29:19 -17.7 AT Up 24.7 303.6 Low 12:22:29 - 12:36:09 -6049
Lake Havasu City 12:29:18 -17.4 AT Up 24.2 304.0 Low 12:22:28 - 12:36:08 -6096
Yuma 12:29:16 -17.6 AT Up 23.4 304.5 Low 12:22:26 - 12:36:06 -6274
Calipatria 12:29:17 -18.4 Dark Up 24.2 304.0 Low 12:22:27 - 12:36:07 -6284
Idyllwild 12:29:20 -19.4 Dark Up 25.4 303.4 Low 12:22:30 - 12:36:10 -6292
Wildwood 12:29:23 -20.9 Dark Up 26.9 302.6 Low 12:22:33 - 12:36:13 -6358

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 523642, (2024/10/24 12:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 48.43  55
57Gam1And      02:03:54.1 +42:19:46  2.3  8.29  79
PPM 044004     01:27:26.7 +41:06:04  6.5  1.38  85
PPM 043836     01:17:45.7 +41:00:49  8.3  0.61  87
PPM 043882     01:20:05.3 +40:38:45  9.9  0.08  87
523642         01:20:28.6 +40:41:18 16.7        87
Positions are for J2000

Event circumstances last updated at 2022/11/13 03:44:02 UT

Marc W. Buie, Southwest Research Institute

RECON