RECON: TNO occultation with 591370

Event between (591370) 13ME14 and star GA1060:17811107 with event index number of 2706726

Geocentric closest approach at 2025/08/25 07:49:56 UTC

J2000 position of star is 22:14:41.6 +17:29:24
Equinox of date position of star is 22:15:44.7 +17:35:57
Stellar brightness G=13.6, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 151 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 22.8 AU from the Sun and 21.9 AU from the Earth.
The TNO is moving 23.6 km/sec on the sky relative to the star, or, 5.3 arcsec/hr.
The 1-sigma error in the time of the event is 96 seconds.
The 1-sigma cross-track error in the shadow position is 2788 km.
The sky-plane scale is 15899.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.4
Diameter=80.5 km assuming a 5% albedo -- 3.4 sec chord
Diameter=32.9 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 591370, (2025/08/25 07:50UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:18.4 +45:22:23  1.3 33.92 119
Markab         23:06:02.4 +15:20:37  2.5 12.22 161
PPM 141171     22:13:05.7 +16:10:04  6.5  1.60 151
PPM 141287     22:18:55.1 +17:32:38  8.2  0.72 152
PPM 141219     22:15:57.2 +17:53:51  9.3  0.28 151
591370         22:15:55.7 +17:37:05 13.6       151
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 25.5 km RECON observability=1.0 and success probability=15.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 07:49:37 -29.1 Dark Down 57.2 176.9 Up 07:41:06 - 07:58:08 3138
Kelowna 07:49:37 -29.5 Dark Down 57.6 176.6 Up 07:41:06 - 07:58:08 3104
Peachland 07:49:38 -29.6 Dark Down 57.7 176.1 Up 07:41:07 - 07:58:09 3098
Summerland 07:49:38 -29.7 Dark Down 57.8 176.2 Up 07:41:07 - 07:58:09 3083
Penticton 07:49:38 -29.8 Dark Down 57.9 176.4 Up 07:41:07 - 07:58:09 3075
Oliver 07:49:38 -30.1 Dark Down 58.3 176.4 Up 07:41:07 - 07:58:09 3043
Victoria 07:49:50 -30.6 Dark Down 58.6 169.3 Up 07:41:19 - 07:58:21 3037
Anarchist Mountain Observatory 07:49:37 -30.3 Dark Down 58.4 176.7 Up 07:41:06 - 07:58:08 3025
Tonasket 07:49:38 -30.6 Dark Down 58.8 176.6 Up 07:41:07 - 07:58:09 2997
Okanogan 07:49:39 -31.0 Dark Down 59.1 176.3 Up 07:41:08 - 07:58:10 2967
Brewster 07:49:40 -31.2 Dark Down 59.3 175.9 Up 07:41:09 - 07:58:11 2945
Manson/Chelan 07:49:41 -31.4 Dark Down 59.5 175.2 Up 07:41:10 - 07:58:12 2930
Wenatchee 07:49:42 -31.9 Dark Down 60.0 174.8 Up 07:41:11 - 07:58:13 2888
Ellensburg 07:49:43 -32.3 Dark Down 60.4 174.3 Up 07:41:12 - 07:58:14 2852
Yakima 07:49:44 -32.7 Dark Down 60.8 174.2 Up 07:41:13 - 07:58:15 2814
Toppenish/White Swan 07:49:43 -32.9 Dark Down 61.0 174.5 Up 07:41:12 - 07:58:14 2791
Pasco 07:49:39 -33.1 Dark Down 61.2 176.9 Up 07:41:08 - 07:58:10 2761
Goldendale 07:49:45 -33.4 Dark Down 61.5 173.5 Up 07:41:14 - 07:58:16 2744
PNWRO 07:49:39 -33.3 Dark Down 61.5 177.4 Up 07:41:08 - 07:58:10 2734
The Dalles 07:49:46 -33.6 Dark Down 61.7 172.8 Up 07:41:15 - 07:58:17 2728
Maupin 07:49:46 -34.1 Dark Down 62.2 172.9 Up 07:41:15 - 07:58:17 2686
Sisters 07:49:49 -34.9 Dark Down 63.0 171.7 Up 07:41:18 - 07:58:20 2609
Redmond 07:49:48 -35.0 Dark Down 63.0 172.5 Up 07:41:17 - 07:58:19 2601
Bend 07:49:48 -35.2 Dark Down 63.2 172.1 Up 07:41:17 - 07:58:19 2582
Oregon Observatory 07:49:49 -35.3 Dark Down 63.4 171.8 Up 07:41:18 - 07:58:20 2568
La Pine/Gilchrist 07:49:49 -35.5 Dark Down 63.6 171.6 Up 07:41:18 - 07:58:20 2549
North Lake 07:49:48 -36.0 Dark Down 64.1 172.8 Up 07:41:17 - 07:58:19 2497
Chiloquin 07:49:51 -36.6 Dark Down 64.7 170.5 Up 07:41:20 - 07:58:22 2445
Paisley 07:49:47 -36.6 Dark Down 64.7 173.4 Up 07:41:16 - 07:58:18 2437
Klamath Falls 07:49:51 -37.0 Dark Down 65.0 170.6 Up 07:41:20 - 07:58:22 2411
Lakeview 07:49:46 -37.1 Dark Down 65.2 173.7 Up 07:41:15 - 07:58:17 2384
Cedarville 07:49:47 -37.8 Dark Down 65.9 174.0 Up 07:41:16 - 07:58:18 2316
Fall River/Burney 07:49:51 -38.2 Dark Down 66.2 171.0 Up 07:41:20 - 07:58:22 2288
Susanville 07:49:49 -38.8 Dark Down 66.9 172.6 Up 07:41:18 - 07:58:20 2213
Greenville 07:49:51 -39.1 Dark Down 67.2 171.8 Up 07:41:20 - 07:58:22 2190
Gimple 07:49:50 -39.1 Dark Down 67.2 172.0 Up 07:41:19 - 07:58:21 2188
Quincy 07:49:51 -39.3 Dark Down 67.4 171.7 Up 07:41:20 - 07:58:22 2169
Portola 07:49:49 -39.5 Dark Down 67.5 172.9 Up 07:41:18 - 07:58:20 2149
Reno 07:49:47 -39.8 Dark Down 67.9 174.4 Up 07:41:16 - 07:58:18 2112
Carson City 07:49:48 -40.1 Dark Down 68.2 174.4 Up 07:41:17 - 07:58:19 2075
Gardnerville 07:49:48 -40.4 Dark Down 68.5 174.4 Up 07:41:17 - 07:58:19 2050
Yerington 07:49:45 -40.3 Dark Down 68.5 175.9 Up 07:41:14 - 07:58:16 2045
Dunrhomin 07:48:55 -38.0 Dark Down 64.9 208.4 Up 07:40:24 - 07:57:26 1999
Hawthorne 07:49:44 -40.8 Dark Down 68.9 177.2 Up 07:41:13 - 07:58:15 1990
Lee Vining 07:49:46 -41.4 Dark Down 69.5 175.9 Up 07:41:15 - 07:58:17 1940
Tonopah 07:49:39 -41.3 Dark Down 69.4 181.0 Up 07:41:08 - 07:58:10 1920
Bishop 07:49:44 -42.0 Dark Down 70.1 177.8 Up 07:41:13 - 07:58:15 1867
Beatty 07:49:38 -42.5 Dark Down 70.6 182.3 Up 07:41:07 - 07:58:09 1794
Indian Springs 07:49:35 -42.8 Dark Down 70.8 185.5 Up 07:41:04 - 07:58:06 1744
CPSLO 07:49:54 -43.9 Dark Down 72.0 170.6 Up 07:41:23 - 07:58:25 1692
Henderson 07:49:32 -43.3 Dark Down 71.3 187.7 Up 07:41:01 - 07:58:03 1678
Patrick 07:49:28 -43.9 Dark Down 71.8 191.3 Up 07:40:57 - 07:57:59 1597
Laughlin/Bullhead City 07:49:31 -44.2 Dark Down 72.1 189.3 Up 07:41:00 - 07:58:02 1581
Kingman/Dolan Springs 07:49:29 -44.1 Dark Down 72.0 190.8 Up 07:40:58 - 07:58:00 1576
Mohave Valley 07:49:32 -44.4 Dark Down 72.4 189.4 Up 07:41:01 - 07:58:03 1553
Wildwood 07:49:48 -45.3 Dark Down 73.4 176.7 Up 07:41:17 - 07:58:19 1531
Lake Havasu City 07:49:31 -44.8 Dark Down 72.8 190.4 Up 07:41:00 - 07:58:02 1507
Parker 07:49:31 -45.2 Dark Down 73.1 190.7 Up 07:41:00 - 07:58:02 1469
Idyllwild 07:49:40 -45.6 Dark Down 73.7 183.0 Up 07:41:09 - 07:58:11 1464
Blythe 07:49:32 -45.7 Dark Down 73.7 190.1 Up 07:41:01 - 07:58:03 1419
George/Scottsdale 07:49:22 -45.4 Dark Down 73.0 198.7 Up 07:40:51 - 07:57:53 1391
Calipatria 07:49:36 -46.2 Dark Down 74.3 187.2 Up 07:41:05 - 07:58:07 1381
Yuma 07:49:33 -46.6 Dark Down 74.6 190.5 Up 07:41:02 - 07:58:04 1321

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 591370, (2025/08/25 07:50UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 33.92 119
Markab         23:04:45.8 +15:12:18  2.5 12.22 161
PPM 141171     22:11:51.3 +16:02:25  6.5  1.60 151
PPM 141287     22:17:40.9 +17:24:53  8.2  0.72 152
PPM 141219     22:14:43.2 +17:46:09  9.3  0.28 151
591370         22:14:41.6 +17:29:24 13.6       151
Positions are for J2000

Event circumstances last updated at 2021/11/12 00:40:11 UT

Marc W. Buie, Southwest Research Institute

RECON