RECON: TNO occultation with 523742

Event between (523742) 14TZ85 and star GA1180:03128748 with event index number of 2323706

Geocentric closest approach at 2023/02/23 09:04:24 UTC

J2000 position of star is 08:11:01.3 +29:42:22
Equinox of date position of star is 08:12:26.7 +29:38:12
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 102 degrees from the moon. Moon is 13% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 54.3 AU from the Sun and 53.5 AU from the Earth.
Apparent velocity is 21.5 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 151 seconds.
The 1-sigma cross-track error in the shadow position is 2268 km.
The sky-plane scale is 38811.9 km/arcsec.

The object has an absolute magnitude Hv=4.8
Diameter=651.7 km assuming a 5% albedo -- 30.3 sec chord
Diameter=266.0 km assuming a 30% albedo -- 12.4 sec chord
Dynamical classification is 7:4EII
 
 
 
 
 
 

Star training set for 523742, (2023/02/23 09:06UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.8 +27:58:06  1.1  5.88  97
15 Cnc         08:14:34.7 +29:35:07  5.6  0.46 102
PPM 098469     08:14:10.2 +29:28:16  8.5  0.41 102
PPM 098425     08:12:00.3 +29:35:14 11.6  0.11 102
523742         08:12:27.3 +29:38:10 16.4       102
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 22.0 km RECON observability=1.0 and success probability=3.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:01:55 -42.7 Dark Down 41.3 266.9 Up 08:48:49 - 09:15:00 7630
Kamloops 09:02:17 -48.0 Dark Down 50.3 255.7 Up 08:49:11 - 09:15:22 7090
Kelowna 09:02:12 -48.6 Dark Down 49.9 257.5 Up 08:49:07 - 09:15:18 7043
Peachland 09:02:13 -48.8 Dark Down 50.2 257.4 Up 08:49:08 - 09:15:19 7025
Summerland 09:02:13 -48.9 Dark Down 50.1 257.6 Up 08:49:07 - 09:15:18 7014
Penticton 09:02:11 -49.0 Dark Down 50.1 257.8 Up 08:49:06 - 09:15:17 7011
Oliver 09:02:11 -49.3 Dark Down 50.2 258.2 Up 08:49:06 - 09:15:17 6980
Anarchist Mountain Observatory 09:02:10 -49.4 Dark Down 50.1 258.6 Up 08:49:04 - 09:15:15 6970
Okanogan 09:02:09 -50.1 Dark Down 50.3 259.2 Up 08:49:03 - 09:15:14 6906
Brewster 09:02:09 -50.4 Dark Down 50.5 259.3 Up 08:49:03 - 09:15:14 6876
Manson/Chelan 09:02:09 -50.7 Dark Down 50.8 259.2 Up 08:49:03 - 09:15:14 6846
Victoria 09:02:19 -50.6 Dark Down 52.8 255.4 Up 08:49:14 - 09:15:25 6813
Wenatchee 09:02:08 -51.1 Dark Down 51.0 259.6 Up 08:49:02 - 09:15:13 6798
Ellensburg 09:02:07 -51.6 Dark Down 51.2 259.9 Up 08:49:01 - 09:15:12 6755
Yakima 09:02:06 -52.0 Dark Down 51.3 260.4 Up 08:49:00 - 09:15:11 6717
PNWRO 09:02:00 -52.1 Dark Down 50.3 262.5 Up 08:48:55 - 09:15:06 6713
Toppenish/White Swan 09:02:05 -52.1 Dark Down 51.2 260.8 Up 08:48:59 - 09:15:10 6702
Dunrhomin 09:01:13 -51.4 Dark Down 40.4 277.6 Up 08:48:07 - 09:14:18 6672
Nikitin 09:01:12 -51.6 Dark Down 40.4 277.8 Up 08:48:07 - 09:14:18 6655
CU-SBO 09:01:12 -51.7 Dark Down 40.4 277.8 Up 08:48:07 - 09:14:18 6647
The Dalles 09:02:05 -53.1 Dark Down 51.9 261.1 Up 08:48:59 - 09:15:10 6606
Maupin 09:02:03 -53.4 Dark Down 51.9 261.7 Up 08:48:58 - 09:15:09 6571
Sisters 09:02:02 -54.4 Dark Down 52.4 262.4 Up 08:48:56 - 09:15:07 6474
Bend 09:02:00 -54.5 Dark Down 52.2 262.9 Up 08:48:54 - 09:15:05 6459
Oregon Observatory 09:02:01 -54.7 Dark Down 52.3 263.1 Up 08:48:55 - 09:15:06 6439
Chiloquin 09:01:58 -56.1 Dark Down 52.8 264.4 Up 08:48:53 - 09:15:04 6301
Klamath Falls 09:01:57 -56.4 Dark Down 52.8 265.0 Up 08:48:52 - 09:15:03 6271
Cedarville 09:01:51 -56.6 Dark Down 51.6 267.0 Up 08:48:46 - 09:14:57 6256
Fall River/Burney 09:01:53 -57.4 Dark Down 52.6 266.8 Up 08:48:48 - 09:14:59 6170
Gimple 09:01:49 -58.1 Dark Down 52.2 268.3 Up 08:48:44 - 09:14:55 6100
Greenville 09:01:48 -58.1 Dark Down 52.3 268.2 Up 08:48:43 - 09:14:54 6098
Portola 09:01:48 -58.3 Dark Down 51.9 269.0 Up 08:48:42 - 09:14:53 6082
Quincy 09:01:49 -58.3 Dark Down 52.3 268.5 Up 08:48:44 - 09:14:55 6078
Reno 09:01:45 -58.4 Dark Down 51.4 269.7 Up 08:48:39 - 09:14:50 6078
Yerington 09:01:42 -58.7 Dark Down 50.9 270.8 Up 08:48:36 - 09:14:47 6046
Carson City 09:01:44 -58.7 Dark Down 51.4 270.2 Up 08:48:39 - 09:14:50 6044
Gardnerville 09:01:43 -58.9 Dark Down 51.4 270.5 Up 08:48:38 - 09:14:49 6022
Hawthorne 09:01:39 -58.9 Dark Down 50.5 271.7 Up 08:48:33 - 09:14:44 6020
Lee Vining 09:01:39 -59.6 Dark Down 50.9 272.1 Up 08:48:34 - 09:14:45 5949
Beatty 09:01:30 -59.6 Dark Down 49.0 274.6 Up 08:48:24 - 09:14:35 5929
Bishop 09:01:36 -59.9 Dark Down 50.3 273.2 Up 08:48:30 - 09:14:41 5916
Patrick 09:01:19 -59.6 Dark Down 46.5 277.7 Up 08:48:13 - 09:14:24 5892
Laughlin/Bullhead City 09:01:19 -60.1 Dark Down 47.1 277.6 Up 08:48:14 - 09:14:25 5842
George/Scottsdale 09:01:09 -59.9 Dark Down 44.7 280.3 Up 08:48:03 - 09:14:14 5808
Lake Havasu City 09:01:17 -60.5 Dark Down 46.8 278.4 Up 08:48:11 - 09:14:22 5787
Idyllwild 09:01:21 -62.3 Dark Down 48.6 278.2 Up 08:48:16 - 09:14:27 5623
Calipatria 09:01:17 -62.2 Dark Down 47.6 279.4 Up 08:48:11 - 09:14:22 5608
Yuma 09:01:14 -62.1 Dark Down 46.8 280.2 Up 08:48:08 - 09:14:19 5600
Wildwood 09:01:28 -62.8 Dark Down 50.2 277.0 Up 08:48:23 - 09:14:34 5588

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 523742, (2023/02/23 09:06UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  5.88  97
15 Cnc         08:13:08.9 +29:39:23  5.6  0.46 102
PPM 098469     08:12:44.4 +29:32:31  8.5  0.41 102
PPM 098425     08:10:34.4 +29:39:25 11.6  0.11 102
523742         08:11:01.3 +29:42:22 16.4       102
Positions are for J2000

Event circumstances last updated at 2022/12/24 03:42:35 UT

Marc W. Buie, Southwest Research Institute

RECON