RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:32322451 with event index number of 2273779

Geocentric closest approach at 2026/06/13 07:50:37 UTC

J2000 position of star is 18:04:51.0 -28:05:47
Equinox of date position of star is 18:06:17.5 -28:05:36
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 146 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 32.1 AU from the Sun and 31.1 AU from the Earth.
The TNO is moving 22.7 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 120 seconds.
The 1-sigma cross-track error in the shadow position is 1299 km.
The sky-plane scale is 22530.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 13.1 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2026/06/13 07:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.0 -26:29:18  0.9 21.24 167
Nunki          18:56:54.2 -26:15:41  2.0 11.35 134
PPM 267912     18:09:45.5 -28:27:06  4.6  0.80 145
PPM 267808     18:06:21.7 -27:51:39  8.4  0.23 146
470593         18:06:31.2 -28:05:34 15.1       145
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 13.4 km RECON observability=0.5 and success probability=1.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 07:50:50 -16.1 AT Down 10.5 169.0 Really Low 07:40:20 - 08:01:21 3731
Kelowna 07:50:48 -16.9 AT Down 11.4 169.8 Really Low 07:40:17 - 08:01:18 3713
Peachland 07:50:49 -17.0 AT Down 11.5 169.5 Really Low 07:40:18 - 08:01:19 3711
Sleaford 07:50:06 -14.0 AT Down 9.8 181.8 Really Low 07:39:36 - 08:00:37 3710
Summerland 07:50:49 -17.2 AT Down 11.6 169.6 Really Low 07:40:18 - 08:01:19 3708
Penticton 07:50:48 -17.2 AT Down 11.7 169.7 Really Low 07:40:18 - 08:01:19 3706
Oliver 07:50:48 -17.6 AT Down 12.1 169.7 Really Low 07:40:18 - 08:01:19 3698
Anarchist Mountain Observatory 07:50:48 -17.8 AT Down 12.2 169.9 Really Low 07:40:17 - 08:01:18 3695
Okanogan 07:50:49 -18.4 Dark Down 12.9 169.7 Really Low 07:40:19 - 08:01:20 3678
Victoria 07:51:01 -18.1 Dark Down 12.2 166.3 Really Low 07:40:31 - 08:01:32 3676
Brewster 07:50:50 -18.7 Dark Down 13.1 169.5 Really Low 07:40:20 - 08:01:21 3671
Manson/Chelan 07:50:51 -18.9 Dark Down 13.3 169.1 Really Low 07:40:21 - 08:01:22 3666
Wenatchee 07:50:53 -19.3 Dark Down 13.7 169.0 Really Low 07:40:22 - 08:01:23 3653
Ellensburg 07:50:54 -19.7 Dark Down 14.1 168.7 Really Low 07:40:23 - 08:01:24 3641
Yakima 07:50:54 -20.1 Dark Down 14.5 168.7 Really Low 07:40:24 - 08:01:25 3630
Toppenish/White Swan 07:50:54 -20.4 Dark Down 14.7 168.9 Really Low 07:40:23 - 08:01:24 3624
PNWRO 07:50:49 -20.8 Dark Down 15.3 170.2 Really Low 07:40:19 - 08:01:20 3614
The Dalles 07:50:58 -21.1 Dark Down 15.4 168.1 Really Low 07:40:27 - 08:01:28 3600
Maupin 07:50:57 -21.5 Dark Down 15.8 168.2 Really Low 07:40:27 - 08:01:28 3587
Sisters 07:50:59 -22.4 Dark Down 16.6 167.7 Really Low 07:40:29 - 08:01:30 3559
Bend 07:50:59 -22.6 Dark Down 16.8 167.9 Really Low 07:40:29 - 08:01:30 3552
Oregon Observatory 07:50:59 -22.8 Dark Down 17.0 167.8 Really Low 07:40:29 - 08:01:30 3546
Chiloquin 07:51:02 -24.1 Dark Down 18.2 167.3 Really Low 07:40:32 - 08:01:33 3500
Klamath Falls 07:51:02 -24.5 Dark Down 18.6 167.4 Really Low 07:40:32 - 08:01:33 3487
Cedarville 07:50:57 -25.2 Dark Down 19.5 168.8 Really Low 07:40:27 - 08:01:28 3463
Fall River/Burney 07:51:02 -25.6 Dark Down 19.8 167.6 Really Low 07:40:31 - 08:01:32 3443
Gimple 07:51:01 -26.6 Dark Down 20.8 168.0 Low 07:40:31 - 08:01:32 3408
Greenville 07:51:01 -26.6 Dark Down 20.7 168.0 Low 07:40:31 - 08:01:32 3408
Quincy 07:51:01 -26.8 Dark Down 20.9 168.0 Low 07:40:31 - 08:01:32 3400
Portola 07:51:00 -26.9 Dark Down 21.1 168.4 Low 07:40:29 - 08:01:30 3396
Reno 07:50:58 -27.2 Dark Down 21.5 169.0 Low 07:40:27 - 08:01:28 3385
Carson City 07:50:58 -27.6 Dark Down 21.8 169.0 Low 07:40:27 - 08:01:28 3370
Yerington 07:50:56 -27.8 Dark Down 22.1 169.5 Low 07:40:25 - 08:01:26 3362
Gardnerville 07:50:58 -27.8 Dark Down 22.1 169.0 Low 07:40:28 - 08:01:29 3360
Dunrhomin 07:50:04 -25.5 Dark Down 21.6 182.6 Low 07:39:33 - 08:00:34 3346
Hawthorne 07:50:54 -28.3 Dark Down 22.7 170.0 Low 07:40:24 - 08:01:25 3342
CU-SBO 07:50:04 -25.8 Dark Down 21.9 182.6 Low 07:39:33 - 08:00:34 3337
Lee Vining 07:50:56 -28.8 Dark Down 23.2 169.5 Low 07:40:26 - 08:01:27 3318
Bishop 07:50:54 -29.4 Dark Down 23.8 170.1 Low 07:40:24 - 08:01:25 3290
Beatty 07:50:48 -29.9 Dark Down 24.5 171.6 Low 07:40:18 - 08:01:19 3267
Patrick 07:50:38 -31.3 Dark Down 26.3 174.3 Low 07:40:07 - 08:01:08 3188
Laughlin/Bullhead City 07:50:41 -31.5 Dark Down 26.4 173.6 Low 07:40:10 - 08:01:11 3178
Lake Havasu City 07:50:40 -32.2 Dark Down 27.1 173.8 Low 07:40:10 - 08:01:11 3144
Wildwood 07:50:57 -32.7 Dark Down 27.0 169.7 Low 07:40:27 - 08:01:28 3133
Idyllwild 07:50:50 -33.0 Dark Down 27.6 171.5 Low 07:40:19 - 08:01:20 3113
George/Scottsdale 07:50:31 -32.8 Dark Down 28.1 176.2 Low 07:40:00 - 08:01:01 3093
Calipatria 07:50:46 -33.6 Dark Down 28.4 172.6 Low 07:40:15 - 08:01:16 3077
Yuma 07:50:42 -34.0 Dark Down 28.9 173.4 Low 07:40:12 - 08:01:13 3051

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 470593, (2026/06/13 07:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.24 167
Nunki          18:55:15.9 -26:17:49  2.0 11.35 134
PPM 267912     18:08:05.0 -28:27:26  4.6  0.80 145
PPM 267808     18:04:41.7 -27:51:52  8.4  0.23 146
470593         18:04:51.0 -28:05:47 15.1       146
Positions are for J2000

Event circumstances last updated at 2022/11/03 05:03:13 UT

Marc W. Buie, Southwest Research Institute

RECON