RECON: TNO occultation with 578992

Event between (578992) 14JL80 and star GA0700:08850191 with event index number of 2555010

Geocentric closest approach at 2026/06/13 07:38:05 UTC

J2000 position of star is 17:14:39.0 -18:04:57
Equinox of date position of star is 17:16:04.8 -18:06:32
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 155 degrees from the moon. Moon is 5% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 28.5 AU from the Sun and 27.5 AU from the Earth.
Apparent velocity is 23.0 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 78 seconds.
The 1-sigma cross-track error in the shadow position is 1053 km.
The sky-plane scale is 19942.1 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 8.7 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 578992, (2026/06/13 07:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.0 -26:29:18  0.9 13.38 167
35Eta Oph      17:11:53.8 -15:45:21  2.6  2.57 155
PPM 232651     17:09:47.2 -17:38:30  6.0  1.60 157
PPM 232796     17:15:27.3 -18:14:52  8.4  0.22 155
578992         17:16:11.7 -18:06:40 16.8       155
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 18.4 km RECON observability=1.0 and success probability=26.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:37:46 -14.3 AT Down 19.1 191.6 Really Low 07:30:47 - 07:44:44 1356
Kamloops 07:38:28 -15.9 AT Down 21.2 177.2 Low 07:31:30 - 07:45:27 1271
Kelowna 07:38:25 -16.8 AT Down 22.0 178.1 Low 07:31:27 - 07:45:24 1242
Peachland 07:38:26 -16.9 AT Down 22.1 177.8 Low 07:31:28 - 07:45:25 1236
Summerland 07:38:26 -17.0 AT Down 22.3 177.9 Low 07:31:28 - 07:45:25 1230
Penticton 07:38:25 -17.1 AT Down 22.4 178.0 Low 07:31:27 - 07:45:24 1227
Oliver 07:38:25 -17.5 AT Down 22.7 178.0 Low 07:31:27 - 07:45:24 1212
Anarchist Mountain Observatory 07:38:25 -17.6 AT Down 22.9 178.2 Low 07:31:27 - 07:45:24 1207
Okanogan 07:38:26 -18.3 Dark Down 23.5 177.9 Low 07:31:27 - 07:45:24 1176
Brewster 07:38:26 -18.5 Dark Down 23.8 177.7 Low 07:31:28 - 07:45:25 1163
Victoria 07:38:38 -17.8 AT Down 23.2 174.0 Low 07:31:39 - 07:45:36 1162
Manson/Chelan 07:38:28 -18.7 Dark Down 24.0 177.3 Low 07:31:29 - 07:45:26 1152
Wenatchee 07:38:28 -19.2 Dark Down 24.5 177.1 Low 07:31:30 - 07:45:27 1129
Ellensburg 07:38:29 -19.6 Dark Down 24.9 176.9 Low 07:31:31 - 07:45:28 1109
Yakima 07:38:29 -20.0 Dark Down 25.3 176.9 Low 07:31:31 - 07:45:28 1090
Toppenish/White Swan 07:38:29 -20.2 Dark Down 25.5 177.0 Low 07:31:30 - 07:45:27 1080
PNWRO 07:38:24 -20.7 Dark Down 25.9 178.6 Low 07:31:25 - 07:45:22 1070
The Dalles 07:38:31 -20.9 Dark Down 26.2 176.2 Low 07:31:33 - 07:45:30 1038
Maupin 07:38:31 -21.4 Dark Down 26.7 176.3 Low 07:31:33 - 07:45:30 1018
Sisters 07:38:33 -22.2 Dark Down 27.5 175.7 Low 07:31:34 - 07:45:31 970
Bend 07:38:32 -22.4 Dark Down 27.8 176.0 Low 07:31:33 - 07:45:30 960
Oregon Observatory 07:38:32 -22.6 Dark Down 27.9 175.9 Low 07:31:34 - 07:45:31 950
Chiloquin 07:38:34 -23.9 Dark Down 29.2 175.4 Low 07:31:35 - 07:45:32 877
Klamath Falls 07:38:34 -24.2 Dark Down 29.6 175.4 Low 07:31:35 - 07:45:32 858
Cedarville 07:38:28 -25.0 Dark Down 30.3 177.2 Up 07:31:30 - 07:45:27 829
Fall River/Burney 07:38:32 -25.4 Dark Down 30.8 175.8 Up 07:31:34 - 07:45:31 794
Dunrhomin 07:37:34 -26.0 Dark Down 30.6 193.5 Up 07:30:35 - 07:44:32 792
Nikitin 07:37:34 -26.1 Dark Down 30.8 193.5 Up 07:30:35 - 07:44:32 781
CU-SBO 07:37:34 -26.2 Dark Down 30.8 193.4 Up 07:30:36 - 07:44:33 777
Gimple 07:38:31 -26.4 Dark Down 31.7 176.4 Up 07:31:32 - 07:45:29 745
Greenville 07:38:31 -26.4 Dark Down 31.7 176.3 Up 07:31:33 - 07:45:30 745
Quincy 07:38:31 -26.6 Dark Down 31.9 176.3 Up 07:31:33 - 07:45:30 733
Portola 07:38:29 -26.7 Dark Down 32.0 176.8 Up 07:31:31 - 07:45:28 729
Reno 07:38:27 -27.1 Dark Down 32.3 177.5 Up 07:31:29 - 07:45:26 716
Carson City 07:38:27 -27.4 Dark Down 32.7 177.5 Up 07:31:28 - 07:45:25 695
Yerington 07:38:24 -27.6 Dark Down 32.9 178.2 Up 07:31:26 - 07:45:23 687
Gardnerville 07:38:27 -27.7 Dark Down 32.9 177.5 Up 07:31:28 - 07:45:25 681
Hawthorne 07:38:22 -28.1 Dark Down 33.4 178.8 Up 07:31:24 - 07:45:21 661
Lee Vining 07:38:24 -28.7 Dark Down 33.9 178.2 Up 07:31:26 - 07:45:23 625
Bishop 07:38:22 -29.3 Dark Down 34.5 179.0 Up 07:31:23 - 07:45:20 590
Beatty 07:38:15 -29.8 Dark Down 35.0 180.9 Up 07:31:17 - 07:45:14 569
Patrick 07:38:04 -31.4 Dark Down 36.4 184.3 Up 07:31:05 - 07:45:02 483
Laughlin/Bullhead City 07:38:06 -31.6 Dark Down 36.7 183.5 Up 07:31:08 - 07:45:05 464
Lake Havasu City 07:38:05 -32.3 Dark Down 37.3 183.8 Up 07:31:07 - 07:45:04 420
George/Scottsdale 07:37:55 -33.0 Dark Down 37.9 186.8 Up 07:30:57 - 07:44:54 375
Wildwood 07:38:22 -32.6 Dark Down 37.8 178.8 Up 07:31:24 - 07:45:21 375
Idyllwild 07:38:15 -33.0 Dark Down 38.2 181.0 Up 07:31:16 - 07:45:13 361
Calipatria 07:38:10 -33.7 Dark Down 38.8 182.4 Up 07:31:11 - 07:45:08 322
Yuma 07:38:06 -34.1 Dark Down 39.2 183.5 Up 07:31:08 - 07:45:05 296

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 578992, (2026/06/13 07:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.38 167
35Eta Oph      17:10:22.7 -15:43:29  2.6  2.57 155
PPM 232651     17:08:14.9 -17:36:33  6.0  1.60 157
PPM 232796     17:13:54.5 -18:13:08  8.4  0.22 155
578992         17:14:39.0 -18:04:57 16.8       155
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:27:03 UT

Marc W. Buie, Southwest Research Institute

RECON