RECON: TNO occultation with 523746

Event between (523746) 14UT114 and star GA1220:02981476 with event index number of 2323030

Geocentric closest approach at 2024/01/09 04:53:09 UTC

J2000 position of star is 06:57:11.5 +32:43:25
Equinox of date position of star is 06:58:45.3 +32:41:24
Stellar brightness G=16.6, 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 7% illuminated.
Apparent brightness V=20.9

[RECON map]
Object is 16.3 AU from the Sun and 15.3 AU from the Earth.
Apparent velocity is 21.6 km/sec on the sky relative to the star, or, 7.0 arcsec/hr.
The 1-sigma error in the time of the event is 34 seconds.
The 1-sigma cross-track error in the shadow position is 575 km.
The sky-plane scale is 11116.9 km/arcsec.

The object has an absolute magnitude Hv=8.8
Diameter=95.5 km assuming a 5% albedo -- 4.8 sec chord
Diameter=39.0 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523746, (2024/01/09 04:58UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:47.1 +27:57:58  1.1 11.38 145
34The Gem      06:54:22.2 +33:55:48  3.6  1.54 156
PPM 072222     06:55:47.7 +32:58:14  8.3  0.68 156
PPM 072279     06:59:32.9 +32:50:27  9.5  0.22 155
523746         06:58:45.3 +32:41:24 16.6       155
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 27.6 km RECON observability=1.0 and success probability=94.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:55:16 -43.1 Dark Down 54.2 103.5 Up 04:51:55 - 04:58:38 344
Kelowna 04:55:17 -43.9 Dark Down 54.9 103.2 Up 04:51:55 - 04:58:38 244
Peachland 04:55:17 -43.7 Dark Down 54.7 102.8 Up 04:51:56 - 04:58:39 241
Victoria 04:55:30 -41.8 Dark Down 52.6 97.9 Up 04:52:08 - 04:58:51 227
Summerland 04:55:18 -43.8 Dark Down 54.8 102.7 Up 04:51:56 - 04:58:39 225
Penticton 04:55:18 -43.9 Dark Down 54.9 102.7 Up 04:51:56 - 04:58:39 215
Oliver 04:55:19 -44.0 Dark Down 55.0 102.2 Up 04:51:57 - 04:58:40 182
Anarchist Mountain Observatory 04:55:19 -44.2 Dark Down 55.2 102.2 Up 04:51:57 - 04:58:40 161
Sleaford 04:54:36 -50.3 Dark Down 61.8 122.3 Up 04:51:15 - 04:57:58 159
Okanogan 04:55:21 -44.3 Dark Down 55.2 101.1 Up 04:51:59 - 04:58:42 105
Brewster 04:55:22 -44.2 Dark Down 55.1 100.5 Up 04:52:00 - 04:58:43 85
Manson/Chelan 04:55:23 -44.1 Dark Down 54.9 99.9 Up 04:52:02 - 04:58:45 75
Wenatchee 04:55:25 -44.1 Dark Down 54.8 99.1 Up 04:52:04 - 04:58:47 35
Ellensburg 04:55:27 -44.1 Dark Down 54.8 98.3 Up 04:52:05 - 04:58:48 1
Yakima 04:55:28 -44.2 Dark Down 54.8 97.7 Up 04:52:06 - 04:58:49 -37
Toppenish/White Swan 04:55:28 -44.3 Dark Down 55.0 97.5 Up 04:52:06 - 04:58:49 -63
The Dalles 04:55:32 -44.0 Dark Down 54.5 95.8 Up 04:52:10 - 04:58:53 -115
PNWRO 04:55:25 -45.4 Dark Down 56.0 98.3 Up 04:52:03 - 04:58:46 -141
Maupin 04:55:33 -44.2 Dark Down 54.6 95.3 Up 04:52:11 - 04:58:54 -158
Sisters 04:55:36 -44.0 Dark Down 54.4 93.7 Up 04:52:15 - 04:58:58 -229
Bend 04:55:36 -44.3 Dark Down 54.6 93.6 Up 04:52:14 - 04:58:57 -260
Oregon Observatory 04:55:37 -44.2 Dark Down 54.5 93.2 Up 04:52:15 - 04:58:58 -272
Chiloquin 04:55:41 -44.2 Dark Down 54.2 91.1 Up 04:52:20 - 04:59:03 -388
Klamath Falls 04:55:42 -44.3 Dark Down 54.3 90.7 Up 04:52:20 - 04:59:03 -424
Cedarville 04:55:39 -45.6 Dark Down 55.5 90.8 Up 04:52:17 - 04:59:00 -542
Fall River/Burney 04:55:43 -44.8 Dark Down 54.6 89.3 Up 04:52:22 - 04:59:05 -552
Greenville 04:55:44 -45.3 Dark Down 54.9 88.3 Up 04:52:23 - 04:59:06 -656
Gimple 04:55:44 -45.3 Dark Down 55.0 88.3 Up 04:52:22 - 04:59:05 -659
Quincy 04:55:45 -45.3 Dark Down 54.9 88.0 Up 04:52:23 - 04:59:06 -676
Portola 04:55:44 -45.7 Dark Down 55.3 88.1 Up 04:52:22 - 04:59:05 -704
Reno 04:55:42 -46.2 Dark Down 55.8 88.1 Up 04:52:21 - 04:59:04 -751
Carson City 04:55:43 -46.3 Dark Down 55.8 87.6 Up 04:52:22 - 04:59:05 -788
Gardnerville 04:55:43 -46.4 Dark Down 55.8 87.3 Up 04:52:22 - 04:59:05 -814
Yerington 04:55:42 -46.8 Dark Down 56.2 87.7 Up 04:52:20 - 04:59:03 -828
Hawthorne 04:55:41 -47.3 Dark Down 56.6 87.3 Up 04:52:20 - 04:59:03 -891
Lee Vining 04:55:44 -47.0 Dark Down 56.2 86.2 Up 04:52:22 - 04:59:05 -933
Bishop 04:55:43 -47.6 Dark Down 56.8 85.7 Up 04:52:21 - 04:59:04 -1016
Dunrhomin 04:54:55 -56.7 Dark Down 66.8 100.2 Up 04:51:33 - 04:58:16 -1070
Nikitin 04:54:55 -56.8 Dark Down 66.8 99.7 Up 04:51:33 - 04:58:16 -1089
CU-SBO 04:54:55 -56.7 Dark Down 66.7 99.5 Up 04:51:34 - 04:58:17 -1094
Beatty 04:55:38 -49.0 Dark Down 58.0 85.8 Up 04:52:17 - 04:59:00 -1114
Wildwood 04:55:50 -47.8 Dark Down 56.2 80.7 Up 04:52:28 - 04:59:11 -1344
Patrick 04:55:32 -51.5 Dark Down 60.2 84.6 Up 04:52:10 - 04:58:53 -1355
Laughlin/Bullhead City 04:55:35 -51.0 Dark Down 59.6 83.9 Up 04:52:13 - 04:58:56 -1359
Lake Havasu City 04:55:35 -51.3 Dark Down 59.7 82.9 Up 04:52:13 - 04:58:56 -1437
Idyllwild 04:55:44 -49.4 Dark Down 57.7 80.8 Up 04:52:23 - 04:59:06 -1442
Calipatria 04:55:41 -50.4 Dark Down 58.6 80.2 Up 04:52:20 - 04:59:03 -1542
George/Scottsdale 04:55:28 -53.4 Dark Down 61.6 82.4 Up 04:52:06 - 04:58:49 -1590
Yuma 04:55:39 -51.2 Dark Down 59.2 79.8 Up 04:52:18 - 04:59:01 -1615

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, (2024/01/09 04:58UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 11.38 145
34The Gem      06:52:47.3 +33:57:39  3.6  1.54 156
PPM 072222     06:54:13.6 +33:00:08  8.3  0.68 156
PPM 072279     06:57:59.0 +32:52:29  9.5  0.22 155
523746         06:57:11.5 +32:43:25 16.6       155
Positions are for J2000

Event circumstances last updated at 2024/01/08 05:06:04 UT

Marc W. Buie, Southwest Research Institute

RECON