RECON: TNO occultation with 523712

Event between (523712) 14JS80 and star GA0700:34293224 with event index number of 2331541

Geocentric closest approach at 2023/07/05 10:21:40 UTC

J2000 position of star is 20:40:27.8 -18:39:29
Equinox of date position of star is 20:41:48.2 -18:34:24
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 6 degrees from the moon. Moon is 94% illuminated.
Apparent brightness V=21.7

[RECON map]
Object is 40.0 AU from the Sun and 39.1 AU from the Earth.
Apparent velocity is 21.7 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 92 seconds.
The 1-sigma cross-track error in the shadow position is 1439 km.
The sky-plane scale is 28366.6 km/arcsec.

The object has an absolute magnitude Hv=5.7
Diameter=430.5 km assuming a 5% albedo -- 20.5 sec chord
Diameter=175.8 km assuming a 30% albedo -- 8.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 523712, (2023/07/05 10:24UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:56.6 -29:29:49  1.2 33.02  28
38Zet Sgr      19:04:06.3 -29:50:40  2.7 24.89  27
15Ups Cap      20:41:23.0 -18:03:16  5.2  0.53   6
PPM 237771     20:42:09.9 -18:42:38  8.4  0.16   5
PPM 237763     20:41:54.4 -18:27:46  8.9  0.11   6
523712         20:41:48.2 -18:34:24 16.8         5
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 25.4 km RECON observability=0.6 and success probability=2.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 10:19:50 -10.8 NT Up 20.3 187.7 Low 10:11:40 - 10:28:01 -500
Victoria 10:20:00 -13.7 AT Up 22.7 184.8 Low 10:11:50 - 10:28:11 -515
Peachland 10:19:49 -11.4 NT Up 21.2 188.4 Low 10:11:38 - 10:27:59 -554
Kelowna 10:19:48 -11.2 NT Up 21.1 188.7 Low 10:11:37 - 10:27:58 -557
Summerland 10:19:48 -11.5 NT Up 21.3 188.5 Low 10:11:38 - 10:27:59 -562
Penticton 10:19:48 -11.5 NT Up 21.4 188.6 Low 10:11:37 - 10:27:58 -568
Oliver 10:19:48 -11.8 NT Up 21.7 188.6 Low 10:11:37 - 10:27:58 -584
Anarchist Mountain Observatory 10:19:47 -11.9 NT Up 21.9 188.8 Low 10:11:37 - 10:27:58 -596
Okanogan 10:19:48 -12.5 AT Up 22.6 188.6 Low 10:11:37 - 10:27:58 -619
Manson/Chelan 10:19:50 -13.1 AT Up 23.1 188.1 Low 10:11:39 - 10:28:00 -626
Brewster 10:19:49 -12.8 AT Up 22.8 188.4 Low 10:11:38 - 10:27:59 -626
Wenatchee 10:19:50 -13.6 AT Up 23.6 187.9 Low 10:11:40 - 10:28:01 -644
Ellensburg 10:19:51 -14.0 AT Up 24.0 187.7 Low 10:11:41 - 10:28:02 -657
Yakima 10:19:51 -14.4 AT Up 24.4 187.7 Low 10:11:41 - 10:28:02 -676
Toppenish/White Swan 10:19:51 -14.5 AT Up 24.6 187.9 Low 10:11:40 - 10:28:01 -691
The Dalles 10:19:54 -15.5 AT Up 25.4 187.2 Low 10:11:43 - 10:28:04 -707
Maupin 10:19:54 -15.8 AT Up 25.9 187.3 Low 10:11:43 - 10:28:04 -731
PNWRO 10:19:46 -14.3 AT Up 24.8 189.5 Low 10:11:36 - 10:27:57 -750
Sisters 10:19:55 -16.7 AT Up 26.8 186.8 Low 10:11:45 - 10:28:06 -761
Bend 10:19:55 -16.8 AT Up 27.0 187.1 Low 10:11:44 - 10:28:05 -780
Oregon Observatory 10:19:55 -17.0 AT Up 27.2 187.0 Low 10:11:44 - 10:28:05 -785
Sleaford 10:19:10 -4.3 CT Up 16.7 201.7 Really Low 10:10:59 - 10:27:20 -819
Chiloquin 10:19:57 -18.3 Dark Up 28.5 186.7 Low 10:11:47 - 10:28:08 -843
Klamath Falls 10:19:57 -18.6 Dark Up 28.8 186.8 Low 10:11:47 - 10:28:08 -863
Fall River/Burney 10:19:56 -19.4 Dark Up 30.0 187.3 Low 10:11:45 - 10:28:06 -939
Cedarville 10:19:51 -18.5 Dark Up 29.4 188.5 Low 10:11:41 - 10:28:02 -948
Greenville 10:19:55 -20.0 Dark Up 30.8 187.8 Up 10:11:45 - 10:28:06 -1004
Gimple 10:19:54 -20.0 Dark Up 30.8 187.9 Up 10:11:44 - 10:28:05 -1007
Quincy 10:19:55 -20.2 Dark Up 31.0 187.8 Up 10:11:45 - 10:28:06 -1016
Portola 10:19:53 -20.1 Dark Up 31.1 188.4 Up 10:11:43 - 10:28:04 -1037
Reno 10:19:51 -20.0 Dark Up 31.3 189.1 Up 10:11:41 - 10:28:02 -1072
Carson City 10:19:51 -20.3 Dark Up 31.6 189.1 Up 10:11:40 - 10:28:01 -1094
Gardnerville 10:19:51 -20.5 Dark Up 31.9 189.2 Up 10:11:41 - 10:28:02 -1110
Yerington 10:19:49 -20.2 Dark Up 31.8 189.9 Up 10:11:38 - 10:27:59 -1125
Hawthorne 10:19:47 -20.4 Dark Up 32.1 190.5 Up 10:11:37 - 10:27:58 -1170
Lee Vining 10:19:50 -21.1 Dark Up 32.8 190.0 Up 10:11:39 - 10:28:00 -1189
Bishop 10:19:47 -21.2 Dark Up 33.3 190.9 Up 10:11:36 - 10:27:57 -1249
Beatty 10:19:41 -20.9 Dark Up 33.4 192.7 Up 10:11:30 - 10:27:51 -1331
Wildwood 10:19:50 -24.0 Dark Up 36.5 191.1 Up 10:11:39 - 10:28:00 -1455
Dunrhomin 10:19:01 -12.5 AT Up 27.4 204.3 Low 10:10:50 - 10:27:11 -1505
Nikitin 10:19:01 -12.6 AT Up 27.6 204.3 Low 10:10:50 - 10:27:11 -1516
CU-SBO 10:19:01 -12.7 AT Up 27.7 204.2 Low 10:10:50 - 10:27:11 -1518
Laughlin/Bullhead City 10:19:33 -21.2 Dark Up 34.7 195.4 Up 10:11:22 - 10:27:43 -1518
Patrick 10:19:31 -20.6 Dark Up 34.3 196.2 Up 10:11:21 - 10:27:42 -1526
Idyllwild 10:19:42 -23.4 Dark Up 36.5 193.3 Up 10:11:32 - 10:27:53 -1542
Lake Havasu City 10:19:33 -21.6 Dark Up 35.3 195.9 Up 10:11:22 - 10:27:43 -1573
Calipatria 10:19:37 -23.3 Dark Up 36.9 194.8 Up 10:11:27 - 10:27:48 -1626
Yuma 10:19:34 -23.1 Dark Up 37.1 195.9 Up 10:11:23 - 10:27:44 -1687
George/Scottsdale 10:19:24 -20.9 Dark Up 35.4 198.7 Up 10:11:14 - 10:27:35 -1713

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 523712, (2023/07/05 10:24UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 33.02  28
38Zet Sgr      19:02:36.7 -29:52:49  2.7 24.89  27
15Ups Cap      20:40:02.9 -18:08:20  5.2  0.53   6
PPM 237771     20:40:49.5 -18:47:43  8.4  0.16   5
PPM 237763     20:40:34.1 -18:32:51  8.9  0.11   6
523712         20:40:27.8 -18:39:29 16.8         6
Positions are for J2000

Event circumstances last updated at 2023/07/04 04:00:32 UT

Marc W. Buie, Southwest Research Institute

RECON