RECON: TNO occultation with 578992

Event between (578992) 14JL80 and star GA0700:08419462 with event index number of 2555057

Geocentric closest approach at 2026/10/10 02:38:26 UTC

J2000 position of star is 17:11:09.5 -18:19:31
Equinox of date position of star is 17:12:35.3 -18:21:13
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 69 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 28.5 AU from the Sun and 29.0 AU from the Earth.
Apparent velocity is 20.9 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 83 seconds.
The 1-sigma cross-track error in the shadow position is 1182 km.
The sky-plane scale is 21019.1 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 9.6 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 578992, (2026/10/10 02:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:03.2 -26:29:20  0.9 12.59  59
35Eta Oph      17:11:54.9 -15:45:22  2.6  2.61  68
PPM 232651     17:09:48.3 -17:38:32  6.0  1.00  68
PPM 232790     17:15:11.3 -18:33:58  8.5  0.62  69
PPM 232733     17:13:07.0 -18:22:37  8.7  0.10  69
578992         17:12:43.4 -18:21:23 15.0        69
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 36.4 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 02:39:33 -13.2 AT Down 12.4 219.1 Really Low 02:32:07 - 02:46:59 11248
Kelowna 02:39:39 -13.8 AT Down 12.6 220.0 Really Low 02:32:13 - 02:47:05 11217
Peachland 02:39:37 -13.7 AT Down 12.9 219.8 Really Low 02:32:11 - 02:47:03 11214
Summerland 02:39:39 -13.7 AT Down 12.9 219.9 Really Low 02:32:13 - 02:47:05 11208
Penticton 02:39:39 -13.8 AT Down 12.9 220.0 Really Low 02:32:13 - 02:47:05 11205
Sleaford 02:40:05 -21.8 Dark Down 4.9 231.3 Really Low 02:32:39 - 02:47:31 11205
Oliver 02:39:41 -13.9 AT Down 13.2 220.1 Really Low 02:32:15 - 02:47:07 11192
Anarchist Mountain Observatory 02:39:42 -14.0 AT Down 13.2 220.3 Really Low 02:32:16 - 02:47:08 11186
Victoria 02:39:31 -11.4 NT Down 15.3 216.7 Really Low 02:32:05 - 02:46:57 11178
Okanogan 02:39:43 -13.9 AT Down 13.8 220.2 Really Low 02:32:17 - 02:47:09 11162
Brewster 02:39:43 -13.8 AT Down 14.1 220.0 Really Low 02:32:17 - 02:47:09 11152
Manson/Chelan 02:39:42 -13.6 AT Down 14.4 219.7 Really Low 02:32:16 - 02:47:08 11145
Wenatchee 02:39:44 -13.5 AT Down 14.9 219.7 Really Low 02:32:18 - 02:47:10 11127
Ellensburg 02:39:44 -13.4 AT Down 15.3 219.6 Really Low 02:32:18 - 02:47:10 11111
Yakima 02:39:46 -13.4 AT Down 15.6 219.6 Really Low 02:32:20 - 02:47:12 11094
Toppenish/White Swan 02:39:47 -13.6 AT Down 15.7 219.8 Really Low 02:32:21 - 02:47:13 11085
PNWRO 02:39:53 -14.7 AT Down 15.3 221.2 Really Low 02:32:27 - 02:47:19 11064
The Dalles 02:39:48 -13.1 AT Down 16.6 219.3 Really Low 02:32:22 - 02:47:14 11054
Maupin 02:39:48 -13.2 AT Down 16.9 219.4 Really Low 02:32:22 - 02:47:14 11036
Sisters 02:39:49 -12.9 AT Down 17.8 219.2 Really Low 02:32:23 - 02:47:15 10998
Bend 02:39:51 -13.1 AT Down 17.9 219.5 Really Low 02:32:25 - 02:47:17 10987
Oregon Observatory 02:39:51 -13.0 AT Down 18.1 219.4 Really Low 02:32:25 - 02:47:17 10979
Chiloquin 02:39:54 -12.8 AT Down 19.3 219.3 Really Low 02:32:28 - 02:47:20 10918
Klamath Falls 02:39:54 -12.9 AT Down 19.5 219.5 Really Low 02:32:28 - 02:47:20 10901
Cedarville 02:40:03 -14.1 AT Down 19.3 221.0 Really Low 02:32:37 - 02:47:29 10861
Fall River/Burney 02:39:59 -13.2 AT Down 20.2 220.1 Low 02:32:33 - 02:47:25 10841
Greenville 02:40:03 -13.6 AT Down 20.7 220.7 Low 02:32:37 - 02:47:29 10792
Gimple 02:40:04 -13.7 AT Down 20.6 220.8 Low 02:32:38 - 02:47:30 10792
Quincy 02:40:04 -13.7 AT Down 20.8 220.8 Low 02:32:38 - 02:47:30 10781
Portola 02:40:05 -14.0 AT Down 20.7 221.2 Low 02:32:39 - 02:47:31 10773
Reno 02:40:10 -14.6 AT Down 20.5 221.8 Low 02:32:44 - 02:47:36 10756
Carson City 02:40:09 -14.6 AT Down 20.8 222.0 Low 02:32:43 - 02:47:35 10737
Yerington 02:40:12 -15.1 AT Down 20.6 222.6 Low 02:32:46 - 02:47:38 10723
Gardnerville 02:40:10 -14.7 AT Down 21.0 222.1 Low 02:32:44 - 02:47:36 10723
Hawthorne 02:40:15 -15.6 AT Down 20.7 223.1 Low 02:32:49 - 02:47:41 10695
Dunrhomin 02:40:49 -25.7 Dark Down 11.7 233.5 Really Low 02:33:23 - 02:48:15 10674
Lee Vining 02:40:16 -15.2 AT Down 21.3 222.9 Low 02:32:50 - 02:47:42 10667
Nikitin 02:40:49 -25.7 Dark Down 11.8 233.5 Really Low 02:33:23 - 02:48:15 10665
CU-SBO 02:40:49 -25.7 Dark Down 11.9 233.4 Really Low 02:33:23 - 02:48:15 10662
Bishop 02:40:20 -15.8 AT Down 21.4 223.7 Low 02:32:54 - 02:47:46 10628
Beatty 02:40:26 -17.2 AT Down 20.8 225.1 Low 02:33:00 - 02:47:52 10592
Patrick 02:40:41 -19.7 Dark Down 20.1 227.9 Low 02:33:15 - 02:48:07 10482
Laughlin/Bullhead City 02:40:38 -19.2 Dark Down 20.7 227.4 Low 02:33:12 - 02:48:04 10472
Wildwood 02:40:27 -15.9 AT Down 23.8 224.5 Low 02:33:01 - 02:47:53 10432
Lake Havasu City 02:40:42 -19.4 Dark Down 21.0 227.8 Low 02:33:16 - 02:48:08 10428
Idyllwild 02:40:36 -17.5 AT Down 22.9 226.1 Low 02:33:10 - 02:48:02 10399
George/Scottsdale 02:40:49 -21.6 Dark Down 19.9 229.9 Really Low 02:33:23 - 02:48:15 10358
Calipatria 02:40:42 -18.6 Dark Down 22.6 227.3 Low 02:33:16 - 02:48:08 10350
Yuma 02:40:45 -19.4 Dark Down 22.3 228.1 Low 02:33:19 - 02:48:11 10316

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, (2026/10/10 02:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.59  59
35Eta Oph      17:10:22.7 -15:43:29  2.6  2.61  68
PPM 232651     17:08:14.9 -17:36:33  6.0  1.00  68
PPM 232790     17:13:37.2 -18:32:11  8.5  0.62  69
PPM 232733     17:11:33.1 -18:20:46  8.7  0.10  69
578992         17:11:09.5 -18:19:31 15.0        69
Positions are for J2000

Event circumstances last updated at 2024/06/20 21:25:24 UT

Marc W. Buie, Southwest Research Institute

RECON