RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:32058171 with event index number of 2273850

Geocentric closest approach at 2026/06/19 09:06:54 UTC

J2000 position of star is 18:04:11.1 -28:06:32
Equinox of date position of star is 18:05:37.6 -28:06:23
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 24% 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 117 seconds.
The 1-sigma cross-track error in the shadow position is 1295 km.
The sky-plane scale is 22526.4 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, (2026/06/19 09:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.1 -26:29:18  0.9 21.09 103
Nunki          18:56:54.3 -26:15:41  2.0 11.50 135
PPM 267912     18:09:45.6 -28:27:06  4.6  0.93 125
PPM 267808     18:06:21.8 -27:51:39  8.4  0.27 124
470593         18:05:51.3 -28:06:21 16.0       124
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 18.9 km RECON observability=0.4 and success probability=8.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 09:05:55 -14.6 AT Down 10.4 191.4 Really Low 08:55:38 - 09:16:12 1909
Victoria 09:06:03 -17.2 AT Down 12.9 188.7 Really Low 08:55:46 - 09:16:20 1890
Peachland 09:05:53 -15.4 AT Down 11.3 191.9 Really Low 08:55:36 - 09:16:10 1878
Kelowna 09:05:52 -15.2 AT Down 11.1 192.2 Really Low 08:55:35 - 09:16:09 1877
Summerland 09:05:52 -15.5 AT Down 11.4 192.0 Really Low 08:55:35 - 09:16:09 1873
Penticton 09:05:52 -15.6 AT Down 11.4 192.1 Really Low 08:55:35 - 09:16:09 1870
Oliver 09:05:52 -15.9 AT Down 11.8 192.1 Really Low 08:55:35 - 09:16:09 1860
Anarchist Mountain Observatory 09:05:51 -16.0 AT Down 11.9 192.3 Really Low 08:55:34 - 09:16:08 1854
Okanogan 09:05:51 -16.7 AT Down 12.6 192.1 Really Low 08:55:34 - 09:16:08 1838
Brewster 09:05:52 -17.0 AT Down 12.9 192.0 Really Low 08:55:35 - 09:16:09 1833
Manson/Chelan 09:05:53 -17.3 AT Down 13.1 191.6 Really Low 08:55:36 - 09:16:10 1832
Wenatchee 09:05:53 -17.7 AT Down 13.6 191.5 Really Low 08:55:36 - 09:16:10 1820
Ellensburg 09:05:53 -18.2 Dark Down 14.1 191.3 Really Low 08:55:36 - 09:16:10 1811
Yakima 09:05:53 -18.6 Dark Down 14.5 191.3 Really Low 08:55:36 - 09:16:10 1798
Toppenish/White Swan 09:05:53 -18.8 Dark Down 14.6 191.5 Really Low 08:55:36 - 09:16:10 1789
The Dalles 09:05:55 -19.7 Dark Down 15.5 190.8 Really Low 08:55:38 - 09:16:12 1774
Maupin 09:05:54 -20.0 Dark Down 15.9 191.0 Really Low 08:55:37 - 09:16:11 1759
PNWRO 09:05:48 -18.8 Dark Down 14.8 192.9 Really Low 08:55:31 - 09:16:05 1756
Sisters 09:05:55 -21.0 Dark Down 16.8 190.6 Really Low 08:55:38 - 09:16:12 1736
Bend 09:05:54 -21.2 Dark Down 17.0 190.8 Really Low 08:55:37 - 09:16:11 1724
Oregon Observatory 09:05:55 -21.4 Dark Down 17.2 190.7 Really Low 08:55:38 - 09:16:12 1720
Sleaford 09:05:17 -10.0 NT Down 6.4 203.7 Really Low 08:55:00 - 09:15:34 1713
Chiloquin 09:05:55 -22.7 Dark Down 18.6 190.4 Really Low 08:55:38 - 09:16:12 1676
Klamath Falls 09:05:55 -23.0 Dark Down 18.9 190.5 Really Low 08:55:38 - 09:16:12 1662
Cedarville 09:05:49 -23.4 Dark Down 19.4 192.0 Really Low 08:55:32 - 09:16:06 1611
Fall River/Burney 09:05:53 -24.1 Dark Down 20.0 190.9 Low 08:55:36 - 09:16:10 1609
Greenville 09:05:51 -24.9 Dark Down 20.8 191.4 Low 08:55:34 - 09:16:08 1564
Gimple 09:05:51 -24.9 Dark Down 20.8 191.5 Low 08:55:34 - 09:16:08 1563
Quincy 09:05:51 -25.1 Dark Down 21.0 191.4 Low 08:55:34 - 09:16:08 1556
Portola 09:05:49 -25.1 Dark Down 21.1 191.9 Low 08:55:32 - 09:16:06 1543
Reno 09:05:47 -25.2 Dark Down 21.2 192.5 Low 08:55:30 - 09:16:04 1522
Carson City 09:05:47 -25.6 Dark Down 21.6 192.5 Low 08:55:30 - 09:16:04 1505
Gardnerville 09:05:46 -25.8 Dark Down 21.8 192.6 Low 08:55:29 - 09:16:03 1494
Yerington 09:05:44 -25.6 Dark Down 21.7 193.1 Low 08:55:27 - 09:16:01 1486
Hawthorne 09:05:42 -25.9 Dark Down 22.0 193.6 Low 08:55:25 - 09:15:59 1456
Lee Vining 09:05:43 -26.6 Dark Down 22.7 193.2 Low 08:55:26 - 09:16:00 1439
Bishop 09:05:40 -27.0 Dark Down 23.1 194.0 Low 08:55:23 - 09:15:57 1398
Beatty 09:05:34 -27.0 Dark Down 23.2 195.5 Low 08:55:17 - 09:15:51 1346
Dunrhomin 09:04:58 -20.2 Dark Down 17.0 205.3 Really Low 08:54:41 - 09:15:15 1261
CU-SBO 09:04:58 -20.4 Dark Down 17.2 205.3 Really Low 08:54:41 - 09:15:15 1252
Wildwood 09:05:39 -30.1 Dark Down 26.3 194.1 Low 08:55:22 - 09:15:56 1234
Laughlin/Bullhead City 09:05:25 -28.0 Dark Down 24.4 197.7 Low 08:55:08 - 09:15:42 1215
Patrick 09:05:23 -27.5 Dark Down 24.0 198.4 Low 08:55:06 - 09:15:40 1214
Idyllwild 09:05:32 -30.0 Dark Down 26.3 196.0 Low 08:55:15 - 09:15:49 1181
Lake Havasu City 09:05:24 -28.5 Dark Down 25.0 198.1 Low 08:55:07 - 09:15:41 1174
Calipatria 09:05:28 -30.2 Dark Down 26.6 197.2 Low 08:55:11 - 09:15:45 1123
Yuma 09:05:24 -30.3 Dark Down 26.8 198.1 Low 08:55:07 - 09:15:41 1081
George/Scottsdale 09:05:14 -28.4 Dark Down 25.0 200.4 Low 08:54:57 - 09:15:31 1080

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, (2026/06/19 09:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.09 103
Nunki          18:55:15.9 -26:17:49  2.0 11.50 135
PPM 267912     18:08:05.0 -28:27:26  4.6  0.93 125
PPM 267808     18:04:41.7 -27:51:52  8.4  0.27 124
470593         18:04:11.1 -28:06:32 16.0       124
Positions are for J2000

Event circumstances last updated at 2022/11/03 05:05:53 UT

Marc W. Buie, Southwest Research Institute

RECON