RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:31925323 with event index number of 2273889

Geocentric closest approach at 2026/06/22 09:43:23 UTC

J2000 position of star is 18:03:51.0 -28:06:52
Equinox of date position of star is 18:05:17.5 -28:06:43
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 84 degrees from the moon. Moon is 55% 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 23.0 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 116 seconds.
The 1-sigma cross-track error in the shadow position is 1339 km.
The sky-plane scale is 22527.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 13.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2026/06/22 09:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.1 -26:29:18  0.9 21.02  63
34Ups Sco      17:32:34.0 -37:18:51  2.7 11.51  77
PPM 267912     18:09:45.6 -28:27:05  4.6  0.99  85
PPM 267808     18:06:21.8 -27:51:39  8.4  0.31  84
470593         18:05:31.3 -28:06:42 15.6        84
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 21.6 km RECON observability=0.2 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)
Kamloops 09:41:53 -12.8 AT Down 8.2 201.9 Really Low 09:31:44 - 09:52:01 9030
Victoria 09:41:58 -15.5 AT Down 10.9 199.4 Really Low 09:31:49 - 09:52:06 9022
Peachland 09:41:49 -13.5 AT Down 8.9 202.4 Really Low 09:31:41 - 09:51:58 8992
Kelowna 09:41:49 -13.3 AT Down 8.8 202.7 Really Low 09:31:41 - 09:51:58 8990
Summerland 09:41:49 -13.6 AT Down 9.1 202.5 Really Low 09:31:41 - 09:51:58 8986
Penticton 09:41:48 -13.6 AT Down 9.1 202.6 Really Low 09:31:40 - 09:51:57 8982
Oliver 09:41:48 -13.9 AT Down 9.4 202.7 Really Low 09:31:39 - 09:51:56 8971
Anarchist Mountain Observatory 09:41:48 -14.0 AT Down 9.5 202.8 Really Low 09:31:39 - 09:51:56 8963
Okanogan 09:41:47 -14.7 AT Down 10.2 202.7 Really Low 09:31:39 - 09:51:56 8946
Manson/Chelan 09:41:48 -15.3 AT Down 10.8 202.2 Really Low 09:31:40 - 09:51:57 8941
Brewster 09:41:47 -15.0 AT Down 10.5 202.5 Really Low 09:31:39 - 09:51:56 8941
Wenatchee 09:41:48 -15.8 AT Down 11.3 202.1 Really Low 09:31:39 - 09:51:56 8929
Ellensburg 09:41:48 -16.2 AT Down 11.7 202.0 Really Low 09:31:39 - 09:51:56 8919
Yakima 09:41:48 -16.6 AT Down 12.1 202.0 Really Low 09:31:39 - 09:51:56 8906
Toppenish/White Swan 09:41:47 -16.7 AT Down 12.2 202.1 Really Low 09:31:38 - 09:51:55 8895
The Dalles 09:41:48 -17.7 AT Down 13.2 201.5 Really Low 09:31:39 - 09:51:56 8882
Maupin 09:41:47 -18.0 Dark Down 13.5 201.6 Really Low 09:31:39 - 09:51:56 8865
PNWRO 09:41:42 -16.7 AT Down 12.2 203.4 Really Low 09:31:33 - 09:51:50 8851
Sisters 09:41:48 -19.0 Dark Down 14.5 201.3 Really Low 09:31:39 - 09:51:56 8842
Bend 09:41:46 -19.1 Dark Down 14.6 201.5 Really Low 09:31:38 - 09:51:55 8828
Oregon Observatory 09:41:47 -19.3 Dark Down 14.8 201.4 Really Low 09:31:39 - 09:51:56 8824
Chiloquin 09:41:46 -20.6 Dark Down 16.2 201.2 Really Low 09:31:38 - 09:51:55 8779
Sleaford 09:41:19 -7.2 NT Down 2.8 213.8 Really Low 09:31:11 - 09:51:28 8764
Klamath Falls 09:41:46 -20.9 Dark Down 16.5 201.3 Really Low 09:31:38 - 09:51:55 8763
Fall River/Burney 09:41:44 -21.9 Dark Down 17.4 201.8 Really Low 09:31:35 - 09:51:52 8704
Cedarville 09:41:40 -21.1 Dark Down 16.7 202.8 Really Low 09:31:31 - 09:51:48 8699
Greenville 09:41:41 -22.6 Dark Down 18.2 202.3 Really Low 09:31:33 - 09:51:50 8653
Gimple 09:41:41 -22.6 Dark Down 18.1 202.3 Really Low 09:31:33 - 09:51:50 8651
Quincy 09:41:41 -22.8 Dark Down 18.3 202.3 Really Low 09:31:33 - 09:51:50 8644
Portola 09:41:40 -22.8 Dark Down 18.3 202.7 Really Low 09:31:31 - 09:51:48 8628
Reno 09:41:37 -22.8 Dark Down 18.4 203.3 Really Low 09:31:28 - 09:51:45 8601
Carson City 09:41:36 -23.1 Dark Down 18.7 203.4 Really Low 09:31:28 - 09:51:45 8583
Gardnerville 09:41:36 -23.3 Dark Down 18.9 203.5 Really Low 09:31:27 - 09:51:44 8570
Yerington 09:41:34 -23.1 Dark Down 18.7 204.0 Really Low 09:31:26 - 09:51:43 8559
Hawthorne 09:41:32 -23.3 Dark Down 18.9 204.5 Really Low 09:31:23 - 09:51:40 8524
Lee Vining 09:41:32 -24.0 Dark Down 19.6 204.1 Really Low 09:31:23 - 09:51:40 8508
Bishop 09:41:30 -24.3 Dark Down 19.9 204.8 Really Low 09:31:21 - 09:51:38 8460
Beatty 09:41:24 -24.1 Dark Down 19.8 206.3 Really Low 09:31:15 - 09:51:32 8395
Wildwood 09:41:27 -27.3 Dark Down 23.0 205.2 Low 09:31:18 - 09:51:35 8288
Dunrhomin 09:40:53 -16.4 AT Down 12.3 215.2 Really Low 09:30:45 - 09:51:02 8249
Laughlin/Bullhead City 09:41:14 -24.8 Dark Down 20.5 208.4 Low 09:31:06 - 09:51:23 8243
CU-SBO 09:40:53 -16.7 AT Down 12.6 215.2 Really Low 09:30:45 - 09:51:02 8239
Patrick 09:41:12 -24.3 Dark Down 20.0 209.0 Low 09:31:04 - 09:51:21 8238
Idyllwild 09:41:20 -26.9 Dark Down 22.6 206.9 Low 09:31:11 - 09:51:28 8220
Lake Havasu City 09:41:13 -25.2 Dark Down 21.0 208.8 Low 09:31:04 - 09:51:21 8198
Calipatria 09:41:15 -26.9 Dark Down 22.7 208.0 Low 09:31:07 - 09:51:24 8151
Yuma 09:41:12 -26.9 Dark Down 22.7 208.8 Low 09:31:03 - 09:51:20 8101
George/Scottsdale 09:41:04 -24.8 Dark Down 20.7 210.9 Low 09:30:55 - 09:51:12 8084

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, (2026/06/22 09:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.02  63
34Ups Sco      17:30:45.8 -37:17:46  2.7 11.51  77
PPM 267912     18:08:05.0 -28:27:26  4.6  0.99  85
PPM 267808     18:04:41.7 -27:51:52  8.4  0.31  84
470593         18:03:51.0 -28:06:52 15.6        84
Positions are for J2000

Event circumstances last updated at 2022/11/03 05:07:25 UT

Marc W. Buie, Southwest Research Institute

RECON