RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:32323643 with event index number of 2273778

Geocentric closest approach at 2026/06/13 07:11:14 UTC

J2000 position of star is 18:04:51.2 -28:05:47
Equinox of date position of star is 18:06:17.7 -28:05:36
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 145 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 1304 km.
The sky-plane scale is 22530.7 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 07:12UT)
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  0.23 145
470593         18:06:31.4 -28:05:34 16.7       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 19.0 km RECON observability=0.3 and success probability=7.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:11:12 -14.7 AT Down 9.5 173.1 Really Low 07:00:42 - 07:21:42 31
Kamloops 07:11:56 -15.3 AT Down 8.9 160.5 Really Low 07:01:26 - 07:22:26 -29
Kelowna 07:11:55 -16.2 AT Down 9.8 161.2 Really Low 07:01:25 - 07:22:25 -41
Peachland 07:11:56 -16.3 AT Down 9.9 161.0 Really Low 07:01:26 - 07:22:26 -45
Summerland 07:11:56 -16.4 AT Down 10.0 161.0 Really Low 07:01:26 - 07:22:26 -48
Penticton 07:11:56 -16.5 AT Down 10.1 161.1 Really Low 07:01:26 - 07:22:26 -49
Oliver 07:11:56 -16.9 AT Down 10.4 161.1 Really Low 07:01:26 - 07:22:26 -58
Anarchist Mountain Observatory 07:11:56 -17.1 AT Down 10.7 161.3 Really Low 07:01:26 - 07:22:26 -60
Okanogan 07:11:57 -17.7 AT Down 11.2 161.0 Really Low 07:01:27 - 07:22:27 -78
Brewster 07:11:58 -17.9 AT Down 11.4 160.8 Really Low 07:01:28 - 07:22:28 -87
Manson/Chelan 07:12:00 -18.1 Dark Down 11.5 160.5 Really Low 07:01:30 - 07:22:30 -94
Victoria 07:12:09 -17.0 AT Down 10.2 157.8 Really Low 07:01:39 - 07:22:39 -102
Wenatchee 07:12:01 -18.5 Dark Down 12.0 160.3 Really Low 07:01:31 - 07:22:31 -109
Ellensburg 07:12:02 -18.9 Dark Down 12.3 160.1 Really Low 07:01:32 - 07:22:32 -121
Yakima 07:12:03 -19.3 Dark Down 12.7 160.1 Really Low 07:01:33 - 07:22:33 -133
Toppenish/White Swan 07:12:03 -19.5 Dark Down 12.9 160.2 Really Low 07:01:33 - 07:22:33 -139
PNWRO 07:11:58 -20.1 Dark Down 13.6 161.5 Really Low 07:01:28 - 07:22:28 -140
The Dalles 07:12:06 -20.2 Dark Down 13.5 159.5 Really Low 07:01:36 - 07:22:36 -168
Maupin 07:12:07 -20.6 Dark Down 13.9 159.5 Really Low 07:01:37 - 07:22:37 -180
Sisters 07:12:10 -21.4 Dark Down 14.6 159.0 Really Low 07:01:40 - 07:22:40 -212
Bend 07:12:09 -21.6 Dark Down 14.9 159.2 Really Low 07:01:39 - 07:22:39 -218
Oregon Observatory 07:12:10 -21.8 Dark Down 15.0 159.1 Really Low 07:01:40 - 07:22:40 -225
Chiloquin 07:12:13 -23.0 Dark Down 16.1 158.6 Really Low 07:01:43 - 07:22:43 -275
Klamath Falls 07:12:13 -23.3 Dark Down 16.5 158.6 Really Low 07:01:43 - 07:22:43 -287
Cedarville 07:12:09 -24.3 Dark Down 17.5 160.0 Really Low 07:01:39 - 07:22:39 -300
Dunrhomin 07:11:17 -26.5 Dark Down 21.3 173.4 Low 07:00:47 - 07:21:47 -317
CU-SBO 07:11:17 -26.7 Dark Down 21.6 173.3 Low 07:00:47 - 07:21:47 -326
Fall River/Burney 07:12:14 -24.6 Dark Down 17.7 158.8 Really Low 07:01:44 - 07:22:44 -329
Gimple 07:12:13 -25.5 Dark Down 18.7 159.2 Really Low 07:01:43 - 07:22:43 -361
Greenville 07:12:13 -25.5 Dark Down 18.6 159.1 Really Low 07:01:43 - 07:22:43 -362
Quincy 07:12:14 -25.7 Dark Down 18.8 159.1 Really Low 07:01:44 - 07:22:44 -370
Portola 07:12:12 -25.9 Dark Down 19.1 159.5 Really Low 07:01:42 - 07:22:42 -371
Reno 07:12:10 -26.3 Dark Down 19.5 160.1 Really Low 07:01:40 - 07:22:40 -377
Carson City 07:12:11 -26.6 Dark Down 19.8 160.0 Really Low 07:01:41 - 07:22:41 -392
Yerington 07:12:09 -26.9 Dark Down 20.2 160.6 Low 07:01:39 - 07:22:39 -396
Gardnerville 07:12:11 -26.9 Dark Down 20.1 160.1 Low 07:01:41 - 07:22:41 -403
Hawthorne 07:12:07 -27.5 Dark Down 20.8 161.0 Low 07:01:37 - 07:22:37 -413
Lee Vining 07:12:10 -27.9 Dark Down 21.2 160.5 Low 07:01:40 - 07:22:40 -440
Bishop 07:12:08 -28.6 Dark Down 21.9 161.1 Low 07:01:38 - 07:22:38 -463
Beatty 07:12:02 -29.3 Dark Down 22.8 162.5 Low 07:01:32 - 07:22:32 -475
Patrick 07:11:53 -31.1 Dark Down 24.8 165.0 Low 07:01:23 - 07:22:23 -533
Laughlin/Bullhead City 07:11:56 -31.3 Dark Down 24.9 164.3 Low 07:01:26 - 07:22:26 -549
Lake Havasu City 07:11:56 -32.0 Dark Down 25.6 164.4 Low 07:01:26 - 07:22:26 -581
George/Scottsdale 07:11:47 -32.9 Dark Down 26.9 166.7 Low 07:01:17 - 07:22:17 -614
Wildwood 07:12:13 -31.8 Dark Down 25.0 160.4 Low 07:01:43 - 07:22:43 -624
Idyllwild 07:12:06 -32.5 Dark Down 25.8 162.1 Low 07:01:36 - 07:22:36 -630
Calipatria 07:12:02 -33.2 Dark Down 26.7 163.1 Low 07:01:32 - 07:22:32 -657
Yuma 07:11:59 -33.7 Dark Down 27.3 163.9 Low 07:01:29 - 07:22:29 -676

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 07:12UT)
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  0.23 145
470593         18:04:51.2 -28:05:47 16.7       145
Positions are for J2000

Event circumstances last updated at 2022/11/03 05:03:01 UT

Marc W. Buie, Southwest Research Institute

RECON