RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0900:12619594 with event index number of 2623914

Geocentric closest approach at 2027/06/26 04:56:50 UTC

J2000 position of star is 19:21:55.7 +00:21:50
Equinox of date position of star is 19:23:10.7 +00:24:43
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 62 degrees from the moon. Moon is 60% illuminated.
Apparent brightness V=22.3

[RECON map]
Object is 20.5 AU from the Sun and 19.6 AU from the Earth.
Apparent velocity is 21.7 km/sec on the sky relative to the star, or, 5.5 arcsec/hr.
The 1-sigma error in the time of the event is 219 seconds.
The 1-sigma cross-track error in the shadow position is 1180 km.
The sky-plane scale is 14231.0 km/arcsec.

The object has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.2 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523686, (2027/06/26 04:57UT)
Object            RA         Dec     mag  sep  mel
Tarazed        19:47:34.0 +10:40:55  2.7 11.90  56
27 Aql         19:22:00.7 -00:50:20  5.4  1.30  62
PPM 167711     19:23:45.7 +00:26:15  8.3  0.11  62
523686         19:23:19.9 +00:25:04 16.2        61
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 4.1 sigma about the mid-time.
The median site spacing is 41.2 km RECON observability=0.3 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 04:59:09 -9.6 NT Down 24.8 125.7 Low 04:44:09 - 05:14:09 8529
Kamloops 04:59:40 -5.5 CT Down 17.7 112.3 Really Low 04:44:40 - 05:14:40 8423
Kelowna 04:59:41 -6.5 NT Down 18.6 112.8 Really Low 04:44:41 - 05:14:41 8364
Peachland 04:59:42 -6.5 NT Down 18.4 112.5 Really Low 04:44:42 - 05:14:42 8356
Summerland 04:59:43 -6.6 NT Down 18.5 112.6 Really Low 04:44:43 - 05:14:43 8345
Penticton 04:59:43 -6.7 NT Down 18.6 112.6 Really Low 04:44:43 - 05:14:43 8340
Oliver 04:59:44 -7.0 NT Down 18.8 112.5 Really Low 04:44:44 - 05:14:44 8314
Anarchist Mountain Observatory 04:59:44 -7.2 NT Down 18.9 112.6 Really Low 04:44:44 - 05:14:44 8302
Victoria 04:59:52 -5.8 CT Down 16.6 109.2 Really Low 04:44:52 - 05:14:52 8264
Okanogan 04:59:46 -7.6 NT Down 19.1 112.2 Really Low 04:44:46 - 05:14:46 8253
Brewster 04:59:48 -7.7 NT Down 19.0 112.0 Really Low 04:44:48 - 05:14:48 8232
Manson/Chelan 04:59:49 -7.7 NT Down 18.9 111.6 Really Low 04:44:49 - 05:14:49 8216
Wenatchee 04:59:51 -8.0 NT Down 19.0 111.3 Really Low 04:44:51 - 05:14:51 8180
Ellensburg 04:59:52 -8.2 NT Down 19.0 111.0 Really Low 04:44:52 - 05:14:52 8148
Yakima 04:59:54 -8.5 NT Down 19.1 110.9 Really Low 04:44:54 - 05:14:54 8117
Toppenish/White Swan 04:59:54 -8.7 NT Down 19.3 111.0 Really Low 04:44:54 - 05:14:54 8100
PNWRO 04:59:53 -9.7 NT Down 20.4 112.1 Low 04:44:53 - 05:14:53 8071
The Dalles 04:59:58 -9.0 NT Down 19.1 110.1 Really Low 04:44:58 - 05:14:58 8038
Maupin 04:59:59 -9.3 NT Down 19.3 110.0 Really Low 04:44:59 - 05:14:59 8005
Sisters 05:00:03 -9.7 NT Down 19.3 109.4 Really Low 04:45:03 - 05:15:03 7934
Bend 05:00:03 -10.0 NT Down 19.5 109.5 Really Low 04:45:03 - 05:15:03 7915
Oregon Observatory 05:00:04 -10.1 NT Down 19.5 109.3 Really Low 04:45:04 - 05:15:04 7901
Chiloquin 05:00:09 -10.9 NT Down 19.6 108.6 Really Low 04:45:09 - 05:15:09 7792
Klamath Falls 05:00:09 -11.1 NT Down 19.8 108.5 Really Low 04:45:09 - 05:15:09 7764
Cedarville 05:00:09 -12.5 AT Down 21.2 109.5 Low 04:45:09 - 05:15:09 7706
Fall River/Burney 05:00:12 -12.2 AT Down 20.5 108.4 Low 04:45:12 - 05:15:12 7664
Dunrhomin 04:59:38 -20.2 Dark Down 31.9 121.1 Up 04:44:38 - 05:14:38 7603
Nikitin 04:59:39 -20.3 Dark Down 32.0 121.0 Up 04:44:39 - 05:14:39 7587
Greenville 05:00:14 -13.1 AT Down 21.1 108.4 Low 04:45:14 - 05:15:14 7587
Gimple 05:00:14 -13.1 AT Down 21.1 108.5 Low 04:45:14 - 05:15:14 7586
CU-SBO 04:59:39 -20.3 Dark Down 31.9 120.9 Up 04:44:39 - 05:14:39 7582
Quincy 05:00:15 -13.3 AT Down 21.2 108.4 Low 04:45:15 - 05:15:15 7569
Portola 05:00:14 -13.6 AT Down 21.5 108.7 Low 04:45:14 - 05:15:14 7558
Reno 05:00:14 -14.1 AT Down 22.1 109.0 Low 04:45:14 - 05:15:14 7535
Carson City 05:00:15 -14.4 AT Down 22.2 108.9 Low 04:45:15 - 05:15:15 7504
Yerington 05:00:14 -14.9 AT Down 22.8 109.3 Low 04:45:14 - 05:15:14 7487
Gardnerville 05:00:15 -14.6 AT Down 22.4 108.9 Low 04:45:15 - 05:15:15 7483
Hawthorne 05:00:14 -15.5 AT Down 23.3 109.5 Low 04:45:14 - 05:15:14 7446
Lee Vining 05:00:17 -15.7 AT Down 23.1 108.9 Low 04:45:17 - 05:15:17 7397
Bishop 05:00:17 -16.5 AT Down 23.9 109.2 Low 04:45:17 - 05:15:17 7343
Beatty 05:00:15 -17.7 AT Down 25.3 110.2 Low 04:45:15 - 05:15:15 7302
Patrick 05:00:12 -20.3 Dark Down 28.0 111.6 Low 04:45:12 - 05:15:12 7168
Laughlin/Bullhead City 05:00:14 -20.2 Dark Down 27.5 111.0 Low 04:45:14 - 05:15:14 7144
Lake Havasu City 05:00:15 -20.8 Dark Down 28.0 110.9 Low 04:45:15 - 05:15:15 7082
Wildwood 05:00:25 -18.8 Dark Down 24.8 107.7 Low 04:45:25 - 05:15:25 7044
Idyllwild 05:00:22 -20.1 Dark Down 26.4 108.8 Low 04:45:22 - 05:15:22 7012
George/Scottsdale 05:00:10 -22.7 Dark Down 30.1 112.2 Up 04:45:10 - 05:15:10 7011
Calipatria 05:00:21 -21.2 Dark Down 27.5 109.3 Low 04:45:21 - 05:15:21 6954
Yuma 05:00:20 -22.1 Dark Down 28.4 109.7 Low 04:45:20 - 05:15:20 6914

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 523686, (2027/06/26 04:57UT)
Object            RA         Dec     mag  sep  mel
Tarazed        19:46:15.6 +10:36:48  2.7 11.90  56
27 Aql         19:20:35.7 -00:53:32  5.4  1.30  62
PPM 167711     19:22:21.5 +00:23:00  8.3  0.11  62
523686         19:21:55.7 +00:21:50 16.2        62
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:29:20 UT

Marc W. Buie, Southwest Research Institute

RECON