RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:29898259 with event index number of 2274354

Geocentric closest approach at 2026/08/20 05:32:27 UTC

J2000 position of star is 17:58:41.4 -28:08:33
Equinox of date position of star is 18:00:08.0 -28:08:34
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 31 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 32.1 AU from the Sun and 31.6 AU from the Earth.
The TNO is moving 9.3 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 268 seconds.
The 1-sigma cross-track error in the shadow position is 1294 km.
The sky-plane scale is 22896.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 32.1 sec chord
Diameter=141.6 km assuming a 30% albedo -- 13.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2026/08/20 05:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.7 -26:29:19  0.9 19.88  11
34Ups Sco      17:32:34.6 -37:18:52  2.7 10.87  27
Gam1Sgr        18:06:43.3 -29:34:35  4.7  2.00  32
PPM 267596     18:00:20.5 -28:45:34  6.6  0.62  31
PPM 267620     18:00:59.0 -27:57:36  8.7  0.23  31
470593         18:00:22.4 -28:08:34 16.1        31
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 3.4 sigma about the mid-time.
The median site spacing is 21.3 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 05:30:33 -18.5 Dark Down 9.0 198.8 Really Low 05:15:33 - 05:45:33 6574
Kelowna 05:30:25 -19.5 Dark Down 9.6 199.6 Really Low 05:15:25 - 05:45:25 6548
Peachland 05:30:25 -19.4 Dark Up 9.7 199.4 Really Low 05:15:25 - 05:45:25 6548
Victoria 05:30:47 -18.8 Dark Up 11.6 196.3 Really Low 05:15:47 - 05:45:47 6544
Summerland 05:30:23 -19.6 Dark Up 9.9 199.4 Really Low 05:15:23 - 05:45:23 6544
Penticton 05:30:23 -19.7 Dark Up 9.9 199.5 Really Low 05:15:23 - 05:45:23 6541
Oliver 05:30:22 -20.0 Dark Up 10.2 199.6 Really Low 05:15:22 - 05:45:22 6532
Anarchist Mountain Observatory 05:30:19 -20.2 Dark Up 10.4 199.7 Really Low 05:15:19 - 05:45:19 6527
Okanogan 05:30:19 -20.6 Dark Up 11.0 199.6 Really Low 05:15:19 - 05:45:19 6511
Brewster 05:30:20 -20.7 Dark Up 11.3 199.4 Really Low 05:15:20 - 05:45:20 6505
Manson/Chelan 05:30:23 -20.7 Dark Up 11.6 199.1 Really Low 05:15:23 - 05:45:23 6503
Wenatchee 05:30:22 -21.0 Dark Up 12.1 199.0 Really Low 05:15:22 - 05:45:22 6491
Ellensburg 05:30:22 -21.2 Dark Up 12.5 198.8 Really Low 05:15:22 - 05:45:22 6481
Yakima 05:30:20 -21.5 Dark Up 12.9 198.8 Really Low 05:15:20 - 05:45:20 6469
Toppenish/White Swan 05:30:19 -21.7 Dark Up 13.1 199.0 Really Low 05:15:19 - 05:45:19 6461
The Dalles 05:30:23 -21.9 Dark Up 14.0 198.4 Really Low 05:15:23 - 05:45:23 6443
Sleaford 05:29:07 -22.1 Dark Down 4.0 210.7 Really Low 05:14:07 - 05:44:07 6440
PNWRO 05:30:06 -22.7 Dark Up 13.1 200.3 Really Low 05:15:06 - 05:45:06 6436
Maupin 05:30:20 -22.3 Dark Up 14.4 198.5 Really Low 05:15:20 - 05:45:20 6429
Sisters 05:30:22 -22.7 Dark Up 15.3 198.1 Really Low 05:15:22 - 05:45:22 6405
Bend 05:30:19 -23.0 Dark Up 15.5 198.4 Really Low 05:15:19 - 05:45:19 6394
Oregon Observatory 05:30:18 -23.1 Dark Up 15.7 198.3 Really Low 05:15:18 - 05:45:18 6390
Chiloquin 05:30:18 -23.8 Dark Up 17.0 198.0 Really Low 05:15:18 - 05:45:18 6346
Klamath Falls 05:30:17 -24.1 Dark Up 17.3 198.1 Really Low 05:15:17 - 05:45:17 6332
Cedarville 05:30:01 -25.4 Dark Up 17.6 199.6 Really Low 05:15:01 - 05:45:01 6292
Fall River/Burney 05:30:10 -25.2 Dark Up 18.4 198.6 Really Low 05:15:10 - 05:45:10 6283
Greenville 05:30:05 -26.0 Dark Up 19.1 199.0 Really Low 05:15:05 - 05:45:05 6242
Gimple 05:30:04 -26.1 Dark Up 19.1 199.1 Really Low 05:15:04 - 05:45:04 6241
Quincy 05:30:04 -26.2 Dark Up 19.3 199.1 Really Low 05:15:04 - 05:45:04 6234
Portola 05:30:01 -26.5 Dark Up 19.3 199.5 Really Low 05:15:01 - 05:45:01 6224
Reno 05:29:54 -27.0 Dark Up 19.4 200.1 Really Low 05:14:54 - 05:44:54 6207
Carson City 05:29:53 -27.3 Dark Up 19.7 200.1 Really Low 05:14:53 - 05:44:53 6191
Gardnerville 05:29:52 -27.5 Dark Up 19.9 200.2 Really Low 05:14:52 - 05:44:52 6180
Yerington 05:29:47 -27.8 Dark Up 19.7 200.7 Really Low 05:14:47 - 05:44:47 6176
Hawthorne 05:29:42 -28.4 Dark Up 20.0 201.2 Low 05:14:42 - 05:44:42 6150
Lee Vining 05:29:43 -28.6 Dark Up 20.7 200.9 Low 05:14:43 - 05:44:43 6130
Bishop 05:29:36 -29.4 Dark Up 21.1 201.6 Low 05:14:36 - 05:44:36 6094
Beatty 05:29:20 -30.5 Dark Up 21.0 203.0 Low 05:14:20 - 05:44:20 6053
Dunrhomin 05:28:03 -32.8 Dark Down 14.0 212.1 Really Low 05:13:03 - 05:43:03 6028
CU-SBO 05:28:03 -33.0 Dark Down 14.2 212.0 Really Low 05:13:03 - 05:43:03 6019
Patrick 05:28:52 -33.1 Dark Up 21.4 205.7 Low 05:13:52 - 05:43:52 5942
Laughlin/Bullhead City 05:28:57 -33.0 Dark Up 21.9 205.1 Low 05:13:57 - 05:43:57 5938
Wildwood 05:29:29 -31.6 Dark Up 24.2 201.9 Low 05:14:29 - 05:44:29 5934
Lake Havasu City 05:28:52 -33.6 Dark Up 22.4 205.5 Low 05:13:52 - 05:43:52 5900
Idyllwild 05:29:12 -32.9 Dark Up 23.9 203.6 Low 05:14:12 - 05:44:12 5893
Calipatria 05:28:59 -34.0 Dark Up 24.1 204.7 Low 05:13:59 - 05:43:59 5844
George/Scottsdale 05:28:29 -35.4 Dark Up 22.2 207.7 Low 05:13:29 - 05:43:29 5822
Yuma 05:28:50 -34.8 Dark Up 24.2 205.5 Low 05:13:50 - 05:43:50 5808

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, (2026/08/20 05:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.88  11
34Ups Sco      17:30:45.8 -37:17:46  2.7 10.87  27
Gam1Sgr        18:05:01.2 -29:34:48  4.7  2.00  32
PPM 267596     17:58:39.0 -28:45:33  6.6  0.62  31
PPM 267620     17:59:18.3 -27:57:37  8.7  0.23  31
470593         17:58:41.4 -28:08:33 16.1        31
Positions are for J2000

Event circumstances last updated at 2022/11/04 04:26:14 UT

Marc W. Buie, Southwest Research Institute

RECON