RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0880:13901023 with event index number of 1472184

Geocentric closest approach at 2026/05/31 08:13:06 UTC

J2000 position of star is 19:09:36.7 -00:29:37
Equinox of date position of star is 19:10:36.7 -00:27:40
Stellar brightness G=15.1, use SENSEUP=128
Star is 47 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 20.4 AU from the Sun and 19.6 AU from the Earth.
The TNO is moving 17.7 km/sec on the sky relative to the star, or, 4.5 arcsec/hr.
The 1-sigma error in the time of the event is 218 seconds.
The 1-sigma cross-track error in the shadow position is 1650 km.
The sky-plane scale is 14250.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 5.2 sec chord
Diameter=37.2 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523686, (2026/05/31 08:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.9 -26:29:18  0.9 46.43   0
Tarazed        19:47:30.9 +10:40:46  2.7 14.37  61
PPM 180573     19:11:13.1 -00:23:01  6.5  0.09  47
523686         19:10:58.2 -00:26:57 15.1        47
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 19.2 km RECON observability=1.0 and success probability=16.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:16:32 -18.0 Dark Up 31.9 139.0 Up 08:01:32 - 08:31:32 2901
Summerland 08:16:33 -18.3 Dark Up 32.0 138.6 Up 08:01:33 - 08:31:33 2872
Penticton 08:16:32 -18.4 Dark Up 32.1 138.7 Up 08:01:32 - 08:31:32 2868
Okanagan Falls 08:16:32 -18.6 Dark Up 32.2 138.6 Up 08:01:32 - 08:31:32 2852
Oliver 08:16:32 -18.7 Dark Up 32.4 138.6 Up 08:01:32 - 08:31:32 2839
Anarchist Mountain Observatory 08:16:33 -18.9 Dark Up 32.6 138.7 Up 08:01:33 - 08:31:33 2828
Oroville 08:16:33 -19.0 Dark Up 32.6 138.6 Up 08:01:33 - 08:31:33 2821
Tonasket 08:16:33 -19.2 Dark Up 32.8 138.5 Up 08:01:33 - 08:31:33 2801
Okanogan 08:16:34 -19.5 Dark Up 33.0 138.2 Up 08:01:34 - 08:31:34 2771
Brewster 08:16:35 -19.8 Dark Up 33.1 137.9 Up 08:01:35 - 08:31:35 2744
Manson/Chelan 08:16:37 -20.1 Dark Up 33.1 137.4 Up 08:01:37 - 08:31:37 2720
Entiat 08:16:37 -20.3 Dark Up 33.2 137.2 Up 08:01:37 - 08:31:37 2700
Wenatchee 08:16:38 -20.5 Dark Up 33.4 137.0 Up 08:01:38 - 08:31:38 2676
Ellensburg 08:16:39 -21.0 Dark Up 33.6 136.6 Up 08:01:39 - 08:31:39 2637
Yakima 08:16:40 -21.4 Dark Up 33.8 136.4 Up 08:01:40 - 08:31:40 2602
Pasco 08:16:35 -21.6 Dark Up 34.8 137.7 Up 08:01:35 - 08:31:35 2600
Toppenish/White Swan 08:16:39 -21.6 Dark Up 34.1 136.5 Up 08:01:39 - 08:31:39 2586
PNWRO 08:16:34 -21.9 Dark Up 35.1 137.9 Up 08:01:34 - 08:31:34 2583
George/Umatilla 08:16:37 -22.0 Dark Up 34.9 137.4 Up 08:01:37 - 08:31:37 2567
Goldendale 08:16:41 -22.2 Dark Up 34.3 135.8 Up 08:01:41 - 08:31:41 2531
The Dalles 08:16:42 -22.4 Dark Up 34.3 135.3 Up 08:01:42 - 08:31:42 2504
Maupin 08:16:43 -22.8 Dark Up 34.6 135.2 Up 08:01:43 - 08:31:43 2469
Madras/Culver 08:16:44 -23.4 Dark Up 35.0 134.9 Up 08:01:44 - 08:31:44 2420
Redmond 08:16:44 -23.7 Dark Up 35.2 134.6 Up 08:01:44 - 08:31:44 2388
Sisters 08:16:45 -23.7 Dark Up 35.0 134.2 Up 08:01:45 - 08:31:45 2382
Bend 08:16:44 -23.9 Dark Up 35.3 134.4 Up 08:01:44 - 08:31:44 2366
Niwot 08:15:44 -25.4 Dark Up 45.6 151.1 Up 08:00:44 - 08:30:44 2360
SwRI 08:15:45 -25.5 Dark Up 45.6 150.9 Up 08:00:45 - 08:30:45 2349
Oregon Observatory 08:16:46 -24.1 Dark Up 35.3 134.2 Up 08:01:46 - 08:31:46 2348
La Pine/Gilchrist 08:16:46 -24.3 Dark Up 35.5 134.0 Up 08:01:46 - 08:31:46 2329
North Lake 08:16:44 -24.7 Dark Up 36.1 134.4 Up 08:01:44 - 08:31:44 2301
Paisley 08:16:43 -25.3 Dark Up 36.6 134.5 Up 08:01:43 - 08:31:43 2259
Chiloquin 08:16:49 -25.4 Dark Up 36.0 133.1 Up 08:01:49 - 08:31:49 2221
Lakeview 08:16:44 -25.7 Dark Up 37.1 134.4 Up 08:01:44 - 08:31:44 2216
Klamath Falls 08:16:49 -25.8 Dark Up 36.3 133.0 Up 08:01:49 - 08:31:49 2192
Tulelake 08:16:48 -26.0 Dark Up 36.7 133.1 Up 08:01:48 - 08:31:48 2173
Cedarville 08:16:43 -26.4 Dark Up 37.7 134.3 Up 08:01:43 - 08:31:43 2160
Fall River/Burney 08:16:48 -26.9 Dark Up 37.3 132.7 Up 08:01:48 - 08:31:48 2091
Susanville 08:16:46 -27.5 Dark Up 38.2 133.1 Up 08:01:46 - 08:31:46 2048
Gimple 08:16:47 -27.8 Dark Up 38.2 132.7 Up 08:01:47 - 08:31:47 2018
Greenville 08:16:48 -27.8 Dark Up 38.2 132.7 Up 08:01:48 - 08:31:48 2016
Quincy 08:16:48 -28.0 Dark Up 38.3 132.6 Up 08:01:48 - 08:31:48 1998
Portola 08:16:46 -28.1 Dark Up 38.7 133.0 Up 08:01:46 - 08:31:46 1996
Reno 08:16:44 -28.3 Dark Up 39.2 133.5 Up 08:01:44 - 08:31:44 1985
Carson City 08:16:44 -28.7 Dark Up 39.5 133.3 Up 08:01:44 - 08:31:44 1951
Yerington 08:16:41 -28.8 Dark Up 40.0 133.9 Up 08:01:41 - 08:31:41 1947
Gardnerville 08:16:44 -28.9 Dark Up 39.7 133.2 Up 08:01:44 - 08:31:44 1930
Hawthorne 08:16:40 -29.3 Dark Up 40.6 134.1 Up 08:01:40 - 08:31:40 1914
Tonopah 08:16:35 -29.6 Dark Up 41.7 135.4 Up 08:01:35 - 08:31:35 1901
Lee Vining 08:16:43 -29.9 Dark Up 40.7 133.3 Up 08:01:43 - 08:31:43 1851
Bishop 08:16:39 -30.4 Dark Up 41.5 133.7 Up 08:01:39 - 08:31:39 1810
Beatty 08:16:34 -30.7 Dark Up 42.8 135.2 Up 08:01:34 - 08:31:34 1802
Indian Springs 08:16:29 -30.9 Dark Up 43.6 136.2 Up 08:01:29 - 08:31:29 1796
Henderson 08:16:26 -31.3 Dark Up 44.4 136.6 Up 08:01:26 - 08:31:26 1761
Lone Pine 08:16:39 -31.1 Dark Up 42.2 133.5 Up 08:01:39 - 08:31:39 1745
Patrick 08:16:22 -31.7 Dark Up 45.4 137.5 Up 08:01:22 - 08:31:22 1727
DCO 08:16:19 -31.9 Dark Up 46.0 138.1 Up 08:01:19 - 08:31:19 1714
Searchlight/Boulder City 08:16:27 -31.9 Dark Up 44.8 136.3 Up 08:01:27 - 08:31:27 1708
Kingman/Dolan Springs 08:16:23 -32.0 Dark Up 45.5 137.1 Up 08:01:23 - 08:31:23 1701
Laughlin/Bullhead City 08:16:25 -32.1 Dark Up 45.2 136.5 Up 08:01:25 - 08:31:25 1687
Mohave Valley 08:16:25 -32.4 Dark Up 45.4 136.3 Up 08:01:25 - 08:31:25 1661
Lake Havasu City 08:16:24 -32.7 Dark Up 45.8 136.3 Up 08:01:24 - 08:31:24 1629
Parker 08:16:24 -33.1 Dark Up 46.1 136.1 Up 08:01:24 - 08:31:24 1596
CPSLO 08:16:50 -32.6 Dark Up 41.6 129.9 Up 08:01:50 - 08:31:50 1563
Blythe 08:16:25 -33.6 Dark Up 46.3 135.3 Up 08:01:25 - 08:31:25 1538
Idyllwild 08:16:35 -33.8 Dark Up 45.0 133.0 Up 08:01:35 - 08:31:35 1500
Wildwood 08:16:42 -33.7 Dark Up 43.6 131.2 Up 08:01:42 - 08:31:42 1491
Calipatria 08:16:29 -34.2 Dark Up 46.1 133.9 Up 08:01:29 - 08:31:29 1468
Yuma 08:16:26 -34.5 Dark Up 47.0 134.6 Up 08:01:26 - 08:31:26 1447

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, (2026/05/31 08:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 46.43   0
Tarazed        19:46:15.6 +10:36:48  2.7 14.37  61
PPM 180573     19:09:51.6 -00:25:41  6.5  0.09  47
523686         19:09:36.7 -00:29:37 15.1        47
Positions are for J2000

Event circumstances last updated at 2019/06/11 22:33:06 UT

Marc W. Buie, Southwest Research Institute

RECON