RECON: TNO occultation with 523746

Event between (523746) 14UT114 and star GA1220:02956350 with event index number of 2323041

Geocentric closest approach at 2024/01/27 05:56:59 UTC

J2000 position of star is 06:53:23.2 +32:40:35
Equinox of date position of star is 06:54:57.0 +32:38:42
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 42 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=21.0

[RECON map]
Object is 16.3 AU from the Sun and 15.4 AU from the Earth.
Apparent velocity is 19.2 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 39 seconds.
The 1-sigma cross-track error in the shadow position is 583 km.
The sky-plane scale is 11183.4 km/arcsec.

The object has an absolute magnitude Hv=8.8
Diameter=95.5 km assuming a 5% albedo -- 5.4 sec chord
Diameter=39.0 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523746, (2024/01/27 05:57UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:47.1 +27:57:58  1.1 12.11  30
34The Gem      06:54:22.4 +33:55:48  3.6  1.29  42
PPM 072222     06:55:47.9 +32:58:14  8.3  0.37  42
PPM 072189     06:54:03.2 +32:45:53  9.7  0.22  42
523746         06:54:57.2 +32:38:42 13.8        42
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 39.2 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)
Sleaford 05:56:26 -53.0 Dark Up 70.1 194.7 Up 05:52:42 - 06:00:11 3603
Kamloops 05:57:19 -48.0 Dark Up 71.0 158.0 Up 05:53:35 - 06:01:04 3582
Kelowna 05:57:17 -49.0 Dark Up 71.9 159.3 Up 05:53:32 - 06:01:01 3486
Peachland 05:57:18 -48.9 Dark Up 72.0 158.4 Up 05:53:33 - 06:01:02 3479
Summerland 05:57:18 -49.0 Dark Up 72.1 158.5 Up 05:53:33 - 06:01:02 3462
Penticton 05:57:17 -49.1 Dark Up 72.2 158.7 Up 05:53:33 - 06:01:02 3454
Oliver 05:57:18 -49.3 Dark Up 72.6 158.3 Up 05:53:33 - 06:01:02 3417
Victoria 05:57:33 -47.6 Dark Up 72.0 147.6 Up 05:53:48 - 06:01:17 3405
Anarchist Mountain Observatory 05:57:17 -49.5 Dark Up 72.8 158.7 Up 05:53:33 - 06:01:02 3397
Okanogan 05:57:19 -49.8 Dark Up 73.3 157.3 Up 05:53:35 - 06:01:04 3332
Brewster 05:57:20 -49.9 Dark Up 73.5 156.4 Up 05:53:36 - 06:01:05 3306
Manson/Chelan 05:57:22 -49.8 Dark Up 73.6 155.0 Up 05:53:37 - 06:01:06 3290
Wenatchee 05:57:22 -50.0 Dark Up 74.0 153.9 Up 05:53:38 - 06:01:07 3242
Ellensburg 05:57:24 -50.1 Dark Up 74.3 152.6 Up 05:53:40 - 06:01:09 3202
Yakima 05:57:25 -50.3 Dark Up 74.6 151.9 Up 05:53:41 - 06:01:10 3159
Toppenish/White Swan 05:57:24 -50.5 Dark Up 74.9 152.0 Up 05:53:40 - 06:01:09 3134
PNWRO 05:57:19 -51.6 Dark Up 75.7 156.0 Up 05:53:34 - 06:01:03 3074
The Dalles 05:57:28 -50.5 Dark Up 75.3 148.2 Up 05:53:44 - 06:01:13 3064
Maupin 05:57:29 -50.7 Dark Up 75.7 147.7 Up 05:53:45 - 06:01:14 3018
Sisters 05:57:31 -50.9 Dark Up 76.2 144.2 Up 05:53:47 - 06:01:16 2932
Bend 05:57:31 -51.2 Dark Up 76.5 144.5 Up 05:53:46 - 06:01:15 2903
Oregon Observatory 05:57:32 -51.2 Dark Up 76.6 143.7 Up 05:53:48 - 06:01:17 2887
Chiloquin 05:57:35 -51.5 Dark Up 77.5 138.8 Up 05:53:50 - 06:01:19 2753
Klamath Falls 05:57:35 -51.8 Dark Up 77.7 138.0 Up 05:53:51 - 06:01:20 2715
Cedarville 05:57:29 -53.1 Dark Up 79.0 141.3 Up 05:53:45 - 06:01:14 2615
Fall River/Burney 05:57:35 -52.5 Dark Up 78.8 135.4 Up 05:53:50 - 06:01:19 2583
Greenville 05:57:34 -53.2 Dark Up 79.7 133.5 Up 05:53:50 - 06:01:19 2478
Gimple 05:57:34 -53.3 Dark Up 79.7 133.8 Up 05:53:49 - 06:01:18 2476
Quincy 05:57:34 -53.3 Dark Up 79.8 132.7 Up 05:53:50 - 06:01:19 2456
Portola 05:57:33 -53.7 Dark Up 80.2 133.9 Up 05:53:48 - 06:01:17 2434
Reno 05:57:30 -54.3 Dark Up 80.7 135.2 Up 05:53:46 - 06:01:15 2395
Carson City 05:57:30 -54.4 Dark Up 81.0 133.7 Up 05:53:46 - 06:01:15 2356
Gardnerville 05:57:30 -54.6 Dark Up 81.2 132.8 Up 05:53:46 - 06:01:15 2329
Yerington 05:57:28 -55.0 Dark Up 81.5 135.4 Up 05:53:43 - 06:01:12 2325
Dunrhomin 05:56:26 -62.8 Dark Up 80.7 217.1 Up 05:52:42 - 06:00:11 2323
Nikitin 05:56:26 -62.9 Dark Up 80.9 217.7 Up 05:52:42 - 06:00:11 2303
CU-SBO 05:56:26 -62.9 Dark Up 81.0 217.6 Up 05:52:42 - 06:00:11 2296
Hawthorne 05:57:26 -55.5 Dark Up 82.1 135.5 Up 05:53:41 - 06:01:10 2266
Lee Vining 05:57:29 -55.4 Dark Up 82.2 130.4 Up 05:53:45 - 06:01:14 2213
Bishop 05:57:26 -56.2 Dark Up 83.0 130.1 Up 05:53:42 - 06:01:11 2136
Beatty 05:57:19 -57.6 Dark Up 84.3 135.9 Up 05:53:35 - 06:01:04 2062
Patrick 05:57:07 -60.3 Dark Up 86.8 149.5 Up 05:53:23 - 06:00:52 1861
Laughlin/Bullhead City 05:57:11 -59.9 Dark Up 86.7 138.4 Up 05:53:26 - 06:00:55 1843
Wildwood 05:57:31 -57.3 Dark Up 84.4 102.7 Up 05:53:46 - 06:01:15 1783
Lake Havasu City 05:57:10 -60.4 Dark Up 87.3 132.3 Up 05:53:26 - 06:00:55 1766
Idyllwild 05:57:22 -58.9 Dark Up 85.9 103.8 Up 05:53:38 - 06:01:07 1715
George/Scottsdale 05:56:59 -62.5 Dark Up 89.0 183.5 Up 05:53:15 - 06:00:44 1652
Calipatria 05:57:17 -60.0 Dark Up 87.0 97.7 Up 05:53:32 - 06:01:01 1632
Yuma 05:57:13 -60.9 Dark Up 87.8 89.7 Up 05:53:29 - 06:00:58 1572

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 523746, (2024/01/27 05:57UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.8 +28:01:33  1.1 12.11  30
34The Gem      06:52:47.3 +33:57:39  3.6  1.29  42
PPM 072222     06:54:13.6 +33:00:08  8.3  0.37  42
PPM 072189     06:52:29.0 +32:47:44  9.7  0.22  42
523746         06:53:23.2 +32:40:35 13.8        42
Positions are for J2000

Event circumstances last updated at 2024/01/08 05:06:46 UT

Marc W. Buie, Southwest Research Institute

RECON