RECON: TNO occultation with 523715

Event between (523715) 14KU101 and star GA0680:06627704 with event index number of 2331392

Geocentric closest approach at 2027/03/18 12:04:02 UTC

J2000 position of star is 16:00:54.9 -20:30:09
Equinox of date position of star is 16:02:20.8 -20:34:12
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 117 degrees from the moon. Moon is 80% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 37.6 AU from the Sun and 37.2 AU from the Earth.
Apparent velocity is 7.4 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 343 seconds.
The 1-sigma cross-track error in the shadow position is 1568 km.
The sky-plane scale is 26987.2 km/arcsec.

The object has an absolute magnitude Hv=6.2
Diameter=332.7 km assuming a 5% albedo -- 46.3 sec chord
Diameter=135.8 km assuming a 30% albedo -- 18.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523715, (2027/03/18 12:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:04.8 -26:29:24  0.9  8.82 125
8Bet1Sco       16:07:01.4 -19:52:40  2.6  1.27 118
PPM 264922     15:59:16.2 -21:03:35  6.1  0.90 117
PPM 264995     16:02:41.8 -21:13:49  7.3  0.65 117
PPM 264983     16:02:10.4 -20:31:34  9.5  0.09 117
523715         16:02:30.4 -20:34:39 15.9       118
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 2.6 sigma about the mid-time.
The median site spacing is 16.5 km RECON observability=0.8 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 12:04:10 -11.0 NT Down 16.8 190.5 Really Low 11:49:10 - 12:19:10 10536
Kamloops 12:06:14 -19.7 Dark Up 18.8 176.8 Really Low 11:51:14 - 12:21:14 10382
Kelowna 12:06:09 -19.5 Dark Up 19.6 177.7 Really Low 11:51:09 - 12:21:09 10361
Peachland 12:06:12 -19.7 Dark Up 19.7 177.4 Really Low 11:51:12 - 12:21:12 10354
Summerland 12:06:11 -19.7 Dark Up 19.9 177.5 Really Low 11:51:11 - 12:21:11 10349
Penticton 12:06:10 -19.7 Dark Up 19.9 177.6 Really Low 11:51:10 - 12:21:10 10347
Oliver 12:06:07 -19.9 Dark Up 20.3 177.6 Low 11:51:07 - 12:21:07 10334
Anarchist Mountain Observatory 12:06:03 -19.8 Dark Up 20.5 177.8 Low 11:51:03 - 12:21:03 10330
Okanogan 12:06:09 -20.2 Dark Up 21.1 177.5 Low 11:51:09 - 12:21:09 10301
Brewster 12:06:10 -20.4 Dark Up 21.4 177.3 Low 11:51:10 - 12:21:10 10288
Manson/Chelan 12:06:16 -20.7 Dark Up 21.6 177.0 Low 11:51:16 - 12:21:16 10276
Victoria 12:06:43 -22.3 Dark Up 20.8 173.9 Low 11:51:43 - 12:21:43 10264
Wenatchee 12:06:15 -21.0 Dark Up 22.0 176.8 Low 11:51:15 - 12:21:15 10254
Ellensburg 12:06:17 -21.3 Dark Up 22.4 176.6 Low 11:51:17 - 12:21:17 10234
Yakima 12:06:16 -21.5 Dark Up 22.8 176.5 Low 11:51:16 - 12:21:16 10216
PNWRO 12:06:01 -20.7 Dark Up 23.5 178.2 Low 11:51:01 - 12:21:01 10209
Toppenish/White Swan 12:06:14 -21.4 Dark Up 23.1 176.7 Low 11:51:14 - 12:21:14 10209
The Dalles 12:06:23 -22.2 Dark Up 23.8 175.9 Low 11:51:23 - 12:21:23 10165
Maupin 12:06:23 -22.3 Dark Up 24.2 176.0 Low 11:51:23 - 12:21:23 10147
Sisters 12:06:25 -23.0 Dark Up 25.1 175.5 Low 11:51:25 - 12:21:25 10100
Bend 12:06:25 -22.9 Dark Up 25.3 175.7 Low 11:51:25 - 12:21:25 10092
Oregon Observatory 12:06:25 -23.1 Dark Up 25.5 175.6 Low 11:51:25 - 12:21:25 10083
Dunrhomin 12:03:31 -13.0 AT Down 28.3 192.1 Low 11:48:31 - 12:18:31 10043
Nikitin 12:03:32 -13.0 AT Down 28.5 192.1 Low 11:48:32 - 12:18:32 10033
CU-SBO 12:03:32 -13.1 AT Down 28.6 192.0 Low 11:48:32 - 12:18:32 10029
Chiloquin 12:06:30 -23.8 Dark Up 26.8 175.1 Low 11:51:30 - 12:21:30 10012
Klamath Falls 12:06:27 -23.9 Dark Up 27.1 175.2 Low 11:51:27 - 12:21:27 9996
Cedarville 12:06:12 -23.1 Dark Down 27.9 176.8 Low 11:51:12 - 12:21:12 9980
Fall River/Burney 12:06:24 -24.1 Dark Up 28.3 175.5 Low 11:51:24 - 12:21:24 9939
Gimple 12:06:18 -24.1 Dark Down 29.3 176.0 Low 11:51:18 - 12:21:18 9897
Greenville 12:06:21 -24.1 Dark Down 29.3 176.0 Low 11:51:21 - 12:21:21 9896
Quincy 12:06:19 -24.2 Dark Down 29.5 175.9 Low 11:51:19 - 12:21:19 9885
Portola 12:06:13 -23.9 Dark Down 29.6 176.4 Low 11:51:13 - 12:21:13 9884
Reno 12:06:08 -23.5 Dark Down 29.9 177.1 Low 11:51:08 - 12:21:08 9877
Carson City 12:06:08 -23.7 Dark Down 30.3 177.1 Up 11:51:08 - 12:21:08 9858
Yerington 12:06:00 -23.3 Dark Down 30.5 177.8 Up 11:51:00 - 12:21:00 9854
Gardnerville 12:06:07 -23.7 Dark Down 30.5 177.2 Up 11:51:07 - 12:21:07 9844
Hawthorne 12:05:51 -23.1 Dark Down 31.0 178.3 Up 11:50:51 - 12:20:51 9834
Lee Vining 12:05:58 -23.6 Dark Down 31.5 177.8 Up 11:50:58 - 12:20:58 9797
Bishop 12:05:50 -23.2 Dark Down 32.1 178.5 Up 11:50:50 - 12:20:50 9770
Beatty 12:05:34 -22.2 Dark Down 32.6 180.3 Up 11:50:34 - 12:20:34 9761
Patrick 12:04:58 -20.4 Dark Down 34.0 183.4 Up 11:49:58 - 12:19:58 9702
Laughlin/Bullhead City 12:05:03 -21.0 Dark Down 34.3 182.6 Up 11:50:03 - 12:20:03 9679
Lake Havasu City 12:05:01 -21.0 Dark Down 35.0 182.9 Up 11:50:01 - 12:20:01 9640
George/Scottsdale 12:04:32 -19.3 Dark Down 35.6 185.6 Up 11:49:32 - 12:19:32 9615
Idyllwild 12:05:27 -23.0 Dark Down 35.8 180.3 Up 11:50:27 - 12:20:27 9567
Wildwood 12:05:50 -24.4 Dark Down 35.4 178.2 Up 11:50:50 - 12:20:50 9566
Calipatria 12:05:12 -22.3 Dark Down 36.4 181.6 Up 11:50:12 - 12:20:12 9540
Yuma 12:05:01 -21.7 Dark Down 36.8 182.6 Up 11:50:01 - 12:20:01 9521

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 523715, (2027/03/18 12:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.82 125
8Bet1Sco       16:05:26.2 -19:48:20  2.6  1.27 118
PPM 264922     15:57:40.5 -20:59:00  6.1  0.90 117
PPM 264995     16:01:05.8 -21:09:20  7.3  0.65 117
PPM 264983     16:00:34.9 -20:27:04  9.5  0.09 117
523715         16:00:54.9 -20:30:09 15.9       117
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:27:20 UT

Marc W. Buie, Southwest Research Institute

RECON