RECON: TNO occultation with 13FA28

Event between 13FA28 and star GA0740:05145860 with event index number of 2051592

Geocentric closest approach at 2026/04/26 09:35:21 UTC

J2000 position of star is 14:14:13.9 -15:08:18
Equinox of date position of star is 14:15:27.1 -15:14:31
Stellar brightness G=12.6, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 62 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 44.6 AU from the Sun and 43.6 AU from the Earth.
The TNO is moving 25.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 208 seconds.
The 1-sigma cross-track error in the shadow position is 3575 km.
The sky-plane scale is 31629.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=361.4 km assuming a 5% albedo -- 14.4 sec chord
Diameter=147.5 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 13FA28, (2026/04/26 09:35UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:35.0 -11:17:52  1.0 12.58  49
PPM 228402     14:12:17.0 -16:25:31  4.2  1.42  61
PPM 228587     14:19:26.5 -14:49:36  8.5  1.01  63
PPM 228495     14:15:47.5 -15:28:45  9.7  0.22  62
13FA28         14:15:40.1 -15:15:37 12.6        62
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 4.3 sigma about the mid-time.
The median site spacing is 12.9 km RECON observability=1.0 and success probability=5.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:35:04 -16.4 AT Up 14.9 218.6 Really Low 09:20:04 - 09:50:04 -1564
Kamloops 09:35:35 -22.4 Dark Up 20.8 205.2 Low 09:20:35 - 09:50:35 -1759
Kelowna 09:35:31 -22.9 Dark Up 21.3 206.2 Low 09:20:31 - 09:50:31 -1775
Peachland 09:35:31 -23.1 Dark Up 21.5 206.0 Low 09:20:31 - 09:50:31 -1782
Summerland 09:35:31 -23.2 Dark Up 21.6 206.1 Low 09:20:31 - 09:50:31 -1786
Penticton 09:35:30 -23.2 Dark Up 21.6 206.2 Low 09:20:30 - 09:50:30 -1787
Oliver 09:35:30 -23.5 Dark Up 21.9 206.3 Low 09:20:30 - 09:50:30 -1799
Anarchist Mountain Observatory 09:35:29 -23.6 Dark Up 22.0 206.5 Low 09:20:29 - 09:50:29 -1802
Tonasket 09:35:29 -23.9 Dark Up 22.3 206.5 Low 09:20:29 - 09:50:29 -1815
Okanogan 09:35:28 -24.2 Dark Up 22.7 206.4 Low 09:20:28 - 09:50:28 -1830
Brewster 09:35:27 -24.5 Dark Up 23.0 206.2 Low 09:20:27 - 09:50:27 -1843
Manson/Chelan 09:35:28 -24.8 Dark Up 23.3 205.9 Low 09:20:28 - 09:50:28 -1856
Wenatchee 09:35:29 -25.3 Dark Up 23.7 205.8 Low 09:20:29 - 09:50:29 -1877
Victoria 09:35:39 -25.2 Dark Up 23.6 202.5 Low 09:20:39 - 09:50:39 -1882
Ellensburg 09:35:28 -25.8 Dark Up 24.2 205.7 Low 09:20:28 - 09:50:28 -1896
PNWRO 09:35:22 -26.1 Dark Up 24.6 207.5 Low 09:20:22 - 09:50:22 -1912
Yakima 09:35:28 -26.1 Dark Up 24.6 205.7 Low 09:20:28 - 09:50:28 -1913
Toppenish/White Swan 09:35:26 -26.3 Dark Up 24.7 205.9 Low 09:20:26 - 09:50:26 -1919
Goldendale 09:35:27 -26.9 Dark Up 25.3 205.6 Low 09:20:27 - 09:50:27 -1949
The Dalles 09:35:27 -27.2 Dark Up 25.6 205.3 Low 09:20:27 - 09:50:27 -1964
Maupin 09:35:26 -27.6 Dark Up 26.0 205.5 Low 09:20:26 - 09:50:26 -1980
Dunrhomin 09:34:32 -25.1 Dark Up 23.7 221.9 Low 09:19:32 - 09:49:32 -2007
CU-SBO 09:34:31 -25.4 Dark Up 23.9 221.9 Low 09:19:31 - 09:49:31 -2020
Sisters 09:35:26 -28.5 Dark Up 26.9 205.2 Low 09:20:26 - 09:50:26 -2027
Bend 09:35:25 -28.6 Dark Up 27.1 205.5 Low 09:20:25 - 09:50:25 -2033
Oregon Observatory 09:35:24 -28.8 Dark Up 27.3 205.4 Low 09:20:24 - 09:50:24 -2043
North Lake 09:35:21 -29.2 Dark Up 27.7 206.1 Low 09:20:21 - 09:50:21 -2063
Lakeview 09:35:19 -30.0 Dark Up 28.5 206.9 Low 09:20:19 - 09:50:19 -2104
Chiloquin 09:35:23 -30.2 Dark Up 28.6 205.2 Low 09:20:23 - 09:50:23 -2111
Klamath Falls 09:35:22 -30.4 Dark Up 28.9 205.4 Low 09:20:22 - 09:50:22 -2126
Cedarville 09:35:16 -30.5 Dark Up 29.0 207.2 Low 09:20:16 - 09:50:16 -2133
Fall River/Burney 09:35:20 -31.4 Dark Up 29.8 206.1 Low 09:20:20 - 09:50:20 -2178
Susanville 09:35:16 -31.7 Dark Up 30.1 207.0 Up 09:20:16 - 09:50:16 -2197
Gimple 09:35:16 -32.0 Dark Up 30.5 206.9 Up 09:20:16 - 09:50:16 -2216
Greenville 09:35:17 -32.0 Dark Up 30.5 206.8 Up 09:20:17 - 09:50:17 -2217
Portola 09:35:13 -32.2 Dark Up 30.6 207.4 Up 09:20:13 - 09:50:13 -2226
Quincy 09:35:16 -32.2 Dark Up 30.7 206.8 Up 09:20:16 - 09:50:16 -2227
Reno 09:35:12 -32.2 Dark Up 30.6 208.1 Up 09:20:12 - 09:50:12 -2228
Yerington 09:35:08 -32.4 Dark Up 30.9 208.9 Up 09:20:08 - 09:50:08 -2247
Carson City 09:35:11 -32.5 Dark Up 30.9 208.2 Up 09:20:11 - 09:50:11 -2247
Gardnerville 09:35:10 -32.7 Dark Up 31.1 208.3 Up 09:20:10 - 09:50:10 -2259
Hawthorne 09:35:06 -32.6 Dark Up 31.1 209.6 Up 09:20:06 - 09:50:06 -2263
Tonopah 09:35:01 -32.5 Dark Up 30.9 211.2 Up 09:20:01 - 09:50:01 -2265
Lee Vining 09:35:07 -33.3 Dark Up 31.8 209.3 Up 09:20:07 - 09:50:07 -2301
Beatty 09:34:57 -33.3 Dark Up 31.7 212.0 Up 09:19:57 - 09:49:57 -2323
Bishop 09:35:03 -33.5 Dark Up 32.0 210.2 Up 09:20:03 - 09:50:03 -2323
Indian Springs 09:34:53 -33.1 Dark Up 31.5 213.2 Up 09:19:53 - 09:49:53 -2325
Henderson 09:34:50 -33.2 Dark Up 31.7 214.0 Up 09:19:50 - 09:49:50 -2345
Patrick 09:34:45 -33.2 Dark Up 31.7 215.4 Up 09:19:45 - 09:49:45 -2364
Kingman/Dolan Springs 09:34:45 -33.5 Dark Up 32.0 215.2 Up 09:19:45 - 09:49:45 -2380
Laughlin/Bullhead City 09:34:47 -33.7 Dark Up 32.2 214.7 Up 09:19:47 - 09:49:47 -2390
Mohave Valley 09:34:46 -33.9 Dark Up 32.4 214.8 Up 09:19:46 - 09:49:46 -2406
Lake Havasu City 09:34:45 -34.2 Dark Up 32.7 215.2 Up 09:19:45 - 09:49:45 -2425
George/Scottsdale 09:34:36 -33.6 Dark Up 32.1 217.9 Up 09:19:36 - 09:49:36 -2437
Parker 09:34:44 -34.4 Dark Up 32.9 215.4 Up 09:19:44 - 09:49:44 -2446
Idyllwild 09:34:51 -35.9 Dark Up 34.4 213.1 Up 09:19:51 - 09:49:51 -2507
Wildwood 09:34:57 -36.4 Dark Up 34.9 211.0 Up 09:19:57 - 09:49:57 -2518
Calipatria 09:34:46 -35.9 Dark Up 34.4 214.5 Up 09:19:46 - 09:49:46 -2527
Yuma 09:34:42 -35.8 Dark Up 34.3 215.6 Up 09:19:42 - 09:49:42 -2540

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 13FA28, (2026/04/26 09:35UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 12.58  49
PPM 228402     14:10:50.5 -16:18:08  4.2  1.42  61
PPM 228587     14:18:00.3 -14:42:23  8.5  1.01  63
PPM 228495     14:14:21.2 -15:21:26  9.7  0.22  62
13FA28         14:14:13.9 -15:08:18 12.6        62
Positions are for J2000

Event circumstances last updated at 2022/05/04 23:33:24 UT

Marc W. Buie, Southwest Research Institute

RECON