RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0900:13677227 with event index number of 2624369

Geocentric closest approach at 2028/07/26 05:56:02 UTC

J2000 position of star is 19:32:54.7 +00:57:49
Equinox of date position of star is 19:34:09.4 +01:01:04
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 23% illuminated.
Apparent brightness V=22.3

[RECON map]
Object is 20.7 AU from the Sun and 19.7 AU from the Earth.
Apparent velocity is 22.6 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is 1848 km.
The sky-plane scale is 14301.9 km/arcsec.

The object has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.0 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523686, (2028/07/26 05:56UT)
Object            RA         Dec     mag  sep  mel
Tarazed        19:47:37.0 +10:41:05  2.7 10.20 118
PPM 167915     19:29:46.9 +02:59:24  5.8  2.27 113
PPM 168216     19:37:28.6 +00:18:52  7.3  1.05 115
PPM 168172     19:36:16.5 +01:19:15  9.5  0.56 115
PPM 168077     19:33:54.9 +01:19:39 11.2  0.32 114
523686         19:34:21.9 +01:01:37 16.0       115
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 3.8 sigma about the mid-time.
The median site spacing is 21.5 km RECON observability=1.0 and success probability=2.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:56:13 -14.3 AT Down 37.5 154.4 Up 05:41:13 - 06:11:13 5846
Kelowna 05:56:12 -15.2 AT Down 38.4 155.2 Up 05:41:12 - 06:11:12 5780
Peachland 05:56:13 -15.2 AT Down 38.5 154.8 Up 05:41:13 - 06:11:13 5778
Summerland 05:56:13 -15.4 AT Down 38.6 154.9 Up 05:41:13 - 06:11:13 5766
Penticton 05:56:13 -15.5 AT Down 38.7 155.0 Up 05:41:13 - 06:11:13 5760
Victoria 05:56:26 -15.0 AT Down 38.5 150.0 Up 05:41:26 - 06:11:26 5758
Oliver 05:56:13 -15.8 AT Down 39.0 154.9 Up 05:41:13 - 06:11:13 5737
Anarchist Mountain Observatory 05:56:13 -16.0 AT Down 39.2 155.0 Up 05:41:13 - 06:11:13 5723
Sleaford 05:55:29 -16.8 AT Down 38.6 172.5 Up 05:40:29 - 06:10:29 5702
Okanogan 05:56:15 -16.5 AT Down 39.8 154.5 Up 05:41:15 - 06:11:15 5684
Brewster 05:56:16 -16.6 AT Down 39.9 154.2 Up 05:41:16 - 06:11:16 5669
Manson/Chelan 05:56:18 -16.7 AT Down 40.0 153.7 Up 05:41:18 - 06:11:18 5661
Wenatchee 05:56:20 -17.0 AT Down 40.4 153.3 Up 05:41:20 - 06:11:20 5632
Ellensburg 05:56:21 -17.3 AT Down 40.7 152.9 Up 05:41:21 - 06:11:21 5608
Yakima 05:56:21 -17.6 AT Down 41.1 152.7 Up 05:41:21 - 06:11:21 5581
Toppenish/White Swan 05:56:21 -17.9 AT Down 41.3 152.8 Up 05:41:21 - 06:11:21 5563
The Dalles 05:56:25 -18.2 Dark Down 41.7 151.5 Up 05:41:25 - 06:11:25 5522
PNWRO 05:56:17 -18.7 Dark Down 42.1 154.6 Up 05:41:17 - 06:11:17 5511
Maupin 05:56:26 -18.6 Dark Down 42.1 151.5 Up 05:41:26 - 06:11:26 5491
Sisters 05:56:30 -19.2 Dark Down 42.8 150.5 Up 05:41:30 - 06:11:30 5438
Bend 05:56:29 -19.5 Dark Down 43.1 150.7 Up 05:41:29 - 06:11:29 5416
Oregon Observatory 05:56:30 -19.6 Dark Down 43.2 150.4 Up 05:41:30 - 06:11:30 5406
Chiloquin 05:56:34 -20.5 Dark Down 44.2 149.3 Up 05:41:34 - 06:11:34 5317
Klamath Falls 05:56:34 -20.8 Dark Down 44.5 149.2 Up 05:41:34 - 06:11:34 5290
Cedarville 05:56:31 -22.1 Dark Down 45.7 151.0 Up 05:41:31 - 06:11:31 5207
Fall River/Burney 05:56:35 -21.9 Dark Down 45.6 149.1 Up 05:41:35 - 06:11:35 5194
Greenville 05:56:36 -22.9 Dark Down 46.6 149.2 Up 05:41:36 - 06:11:36 5115
Gimple 05:56:35 -22.9 Dark Down 46.6 149.4 Up 05:41:35 - 06:11:35 5114
Quincy 05:56:36 -23.1 Dark Down 46.8 149.1 Up 05:41:36 - 06:11:36 5100
Portola 05:56:35 -23.4 Dark Down 47.1 149.7 Up 05:41:35 - 06:11:35 5081
Reno 05:56:33 -23.9 Dark Down 47.5 150.4 Up 05:41:33 - 06:11:33 5047
Carson City 05:56:33 -24.2 Dark Down 47.9 150.3 Up 05:41:33 - 06:11:33 5018
Gardnerville 05:56:35 -24.4 Dark Down 48.1 150.2 Up 05:41:35 - 06:11:35 4998
Yerington 05:56:31 -24.6 Dark Down 48.3 151.0 Up 05:41:31 - 06:11:31 4990
Hawthorne 05:56:31 -25.2 Dark Down 48.9 151.5 Up 05:41:31 - 06:11:31 4943
Lee Vining 05:56:33 -25.5 Dark Down 49.2 150.5 Up 05:41:33 - 06:11:33 4907
Bishop 05:56:32 -26.3 Dark Down 50.0 151.2 Up 05:41:32 - 06:11:32 4844
Dunrhomin 05:55:40 -28.2 Dark Down 50.4 172.1 Up 05:40:40 - 06:10:40 4811
Nikitin 05:55:41 -28.3 Dark Down 50.6 172.1 Up 05:40:41 - 06:10:41 4797
CU-SBO 05:55:41 -28.4 Dark Down 50.7 171.9 Up 05:40:41 - 06:10:41 4793
Beatty 05:56:27 -27.4 Dark Down 51.0 153.3 Up 05:41:27 - 06:11:27 4772
Patrick 05:56:20 -29.8 Dark Down 53.3 156.9 Up 05:41:20 - 06:11:20 4586
Laughlin/Bullhead City 05:56:22 -29.8 Dark Down 53.3 155.7 Up 05:41:22 - 06:11:22 4580
Wildwood 05:56:38 -29.0 Dark Down 52.7 148.9 Up 05:41:38 - 06:11:38 4574
Lake Havasu City 05:56:22 -30.4 Dark Down 54.0 155.7 Up 05:41:22 - 06:11:22 4517
Idyllwild 05:56:32 -30.1 Dark Down 53.8 151.5 Up 05:41:32 - 06:11:32 4503
Calipatria 05:56:29 -31.1 Dark Down 54.8 153.0 Up 05:41:29 - 06:11:29 4424
George/Scottsdale 05:56:14 -32.1 Dark Down 55.5 159.3 Up 05:41:14 - 06:11:14 4396
Yuma 05:56:26 -31.9 Dark Down 55.5 154.1 Up 05:41:26 - 06:11:26 4366

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, (2028/07/26 05:56UT)
Object            RA         Dec     mag  sep  mel
Tarazed        19:46:15.6 +10:36:48  2.7 10.20 118
PPM 167915     19:28:20.8 +02:55:47  5.8  2.27 113
PPM 168216     19:36:01.0 +00:14:57  7.3  1.05 115
PPM 168172     19:34:49.5 +01:15:23  9.5  0.56 115
PPM 168077     19:32:27.8 +01:15:52 11.2  0.32 114
523686         19:32:54.7 +00:57:49 16.0       114
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:33:26 UT

Marc W. Buie, Southwest Research Institute

RECON