RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:30956178 with event index number of 2274137

Geocentric closest approach at 2026/07/15 04:23:33 UTC

J2000 position of star is 18:01:24.5 -28:08:34
Equinox of date position of star is 18:02:51.0 -28:08:30
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 147 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 32.1 AU from the Sun and 31.2 AU from the Earth.
The TNO is moving 20.8 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 124 seconds.
The 1-sigma cross-track error in the shadow position is 1321 km.
The sky-plane scale is 22594.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 14.3 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2026/07/15 04:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.3 -26:29:19  0.9 20.48 126
34Ups Sco      17:32:34.2 -37:18:51  2.7 11.19 139
PPM 267912     18:09:45.8 -28:27:05  4.6  1.50 148
PPM 267738     18:04:34.6 -27:49:27  6.7  0.46 147
PPM 267712     18:03:48.2 -28:23:19  8.6  0.29 147
470593         18:03:05.0 -28:08:29 16.2       147
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 34.9 km RECON observability=0.2 and success probability=10.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 04:24:20 -8.0 NT Down 8.4 164.8 Really Low 04:13:32 - 04:35:09 76
Kamloops 04:25:06 -2.8 CT Up 6.4 152.5 Really Low 04:14:18 - 04:35:55 -120
Kelowna 04:25:05 -3.8 CT Up 7.4 153.2 Really Low 04:14:17 - 04:35:54 -128
Peachland 04:25:07 -3.7 CT Up 7.4 152.9 Really Low 04:14:18 - 04:35:55 -136
Summerland 04:25:07 -3.9 CT Up 7.6 153.0 Really Low 04:14:18 - 04:35:55 -138
Penticton 04:25:06 -4.0 CT Up 7.7 153.1 Really Low 04:14:18 - 04:35:55 -139
Oliver 04:25:07 -4.2 CT Up 8.0 153.1 Really Low 04:14:19 - 04:35:56 -149
Anarchist Mountain Observatory 04:25:07 -4.4 CT Up 8.2 153.2 Really Low 04:14:18 - 04:35:55 -150
Okanogan 04:25:08 -4.7 CT Up 8.7 153.0 Really Low 04:14:19 - 04:35:56 -174
Brewster 04:25:08 -4.8 CT Up 8.9 152.8 Really Low 04:14:19 - 04:35:56 -190
Manson/Chelan 04:25:08 -4.7 CT Up 9.0 152.5 Really Low 04:14:19 - 04:35:56 -211
Wenatchee 04:25:08 -4.9 CT Up 9.3 152.3 Really Low 04:14:19 - 04:35:56 -241
PNWRO 04:25:08 -6.6 NT Up 11.0 153.4 Really Low 04:14:19 - 04:35:56 -249
Ellensburg 04:25:08 -5.1 CT Up 9.6 152.1 Really Low 04:14:19 - 04:35:56 -271
Dunrhomin 04:24:31 -17.6 AT Down 19.9 164.7 Really Low 04:13:43 - 04:35:20 -281
CU-SBO 04:24:32 -17.8 AT Down 20.2 164.6 Low 04:13:44 - 04:35:21 -293
Yakima 04:25:08 -5.3 CT Up 10.0 152.0 Really Low 04:14:19 - 04:35:56 -293
Toppenish/White Swan 04:25:08 -5.6 CT Up 10.2 152.2 Really Low 04:14:19 - 04:35:56 -296
Maupin 04:25:20 -6.0 CT Up 11.1 151.5 Really Low 04:14:32 - 04:36:09 -303
Victoria 04:25:08 -2.6 CT Up 7.4 149.8 Really Low 04:14:19 - 04:35:56 -343
Sisters 04:25:24 -6.3 NT Up 11.7 151.0 Really Low 04:14:35 - 04:36:12 -343
Bend 04:25:23 -6.6 NT Up 12.0 151.2 Really Low 04:14:35 - 04:36:12 -348
Oregon Observatory 04:25:24 -6.6 NT Up 12.1 151.1 Really Low 04:14:36 - 04:36:13 -356
The Dalles 04:25:08 -5.6 CT Up 10.7 151.4 Really Low 04:14:19 - 04:35:56 -381
Chiloquin 04:25:28 -7.2 NT Up 13.1 150.6 Really Low 04:14:40 - 04:36:17 -416
Cedarville 04:25:24 -8.8 NT Down 14.6 151.9 Really Low 04:14:36 - 04:36:13 -429
Klamath Falls 04:25:28 -7.4 NT Down 13.4 150.7 Really Low 04:14:40 - 04:36:17 -429
Fall River/Burney 04:25:30 -8.4 NT Down 14.6 150.8 Really Low 04:14:41 - 04:36:18 -472
Gimple 04:25:30 -9.3 NT Down 15.6 151.2 Really Low 04:14:41 - 04:36:18 -502
Greenville 04:25:30 -9.2 NT Down 15.6 151.1 Really Low 04:14:41 - 04:36:18 -504
Portola 04:25:29 -9.7 NT Down 16.0 151.4 Really Low 04:14:40 - 04:36:17 -509
Reno 04:25:27 -10.3 NT Down 16.5 151.9 Really Low 04:14:39 - 04:36:16 -509
Quincy 04:25:30 -9.4 NT Down 15.7 151.1 Really Low 04:14:42 - 04:36:19 -513
Yerington 04:25:26 -11.0 NT Down 17.2 152.4 Really Low 04:14:37 - 04:36:14 -523
Carson City 04:25:28 -10.5 NT Down 16.8 151.9 Really Low 04:14:39 - 04:36:16 -525
Hawthorne 04:25:25 -11.6 NT Down 17.8 152.8 Really Low 04:14:36 - 04:36:13 -535
Gardnerville 04:25:28 -10.7 NT Down 17.1 151.9 Really Low 04:14:39 - 04:36:16 -536
Lee Vining 04:25:27 -11.7 NT Down 18.2 152.3 Really Low 04:14:39 - 04:36:16 -570
Beatty 04:25:20 -13.8 AT Down 19.9 154.1 Really Low 04:14:32 - 04:36:09 -581
Bishop 04:25:26 -12.5 AT Down 18.9 152.8 Really Low 04:14:37 - 04:36:14 -587
Patrick 04:25:08 -16.5 AT Down 22.2 156.4 Low 04:14:19 - 04:35:56 -614
Laughlin/Bullhead City 04:25:08 -16.2 AT Down 22.2 155.7 Low 04:14:19 - 04:35:56 -649
George/Scottsdale 04:25:06 -18.9 Dark Down 24.5 157.9 Low 04:14:17 - 04:35:54 -670
Lake Havasu City 04:25:08 -16.8 AT Down 22.9 155.8 Low 04:14:19 - 04:35:56 -679
Idyllwild 04:25:25 -15.9 AT Down 22.8 153.6 Low 04:14:36 - 04:36:13 -745
Calipatria 04:25:21 -17.0 AT Down 23.8 154.5 Low 04:14:33 - 04:36:10 -759
Wildwood 04:25:32 -14.5 AT Down 21.8 152.1 Low 04:14:43 - 04:36:20 -760
Yuma 04:25:08 -17.9 AT Down 24.5 155.2 Low 04:14:19 - 04:35:56 -798

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, (2026/07/15 04:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.48 126
34Ups Sco      17:30:45.8 -37:17:46  2.7 11.19 139
PPM 267912     18:08:05.0 -28:27:26  4.6  1.50 148
PPM 267738     18:02:54.3 -27:49:36  6.7  0.46 147
PPM 267712     18:02:07.5 -28:23:26  8.6  0.29 147
470593         18:01:24.5 -28:08:34 16.2       147
Positions are for J2000

Event circumstances last updated at 2022/11/04 04:05:58 UT

Marc W. Buie, Southwest Research Institute

RECON