RECON: TNO occultation with 578992

Event between (578992) 14JL80 and star GA0700:09121941 with event index number of 2554991

Geocentric closest approach at 2026/05/27 10:55:16 UTC

J2000 position of star is 17:16:35.6 -18:06:52
Equinox of date position of star is 17:18:01.4 -18:08:23
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 57 degrees from the moon. Moon is 86% 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 22.2 km/sec on the sky relative to the star, or, 4.0 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 1038 km.
The sky-plane scale is 19961.6 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 9.1 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 578992, (2026/05/27 10:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.8 -26:29:18  0.9 13.71  47
35Eta Oph      17:11:53.7 -15:45:21  2.6  2.81  56
PPM 232892     17:19:50.6 -16:20:16  5.9  1.85  58
PPM 232796     17:15:27.1 -18:14:52  8.4  0.65  57
PPM 232859     17:18:15.6 -18:09:48  8.9  0.04  57
578992         17:18:08.2 -18:08:30 16.6        58
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 21.4 km RECON observability=0.5 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 10:54:10 -8.3 NT Down 16.6 208.8 Really Low 10:46:46 - 11:01:34 5106
Kelowna 10:54:07 -8.5 NT Down 17.1 209.7 Really Low 10:46:43 - 11:01:31 5067
Peachland 10:54:06 -8.7 NT Down 17.2 209.5 Really Low 10:46:42 - 11:01:30 5065
Summerland 10:54:06 -8.8 NT Down 17.3 209.6 Really Low 10:46:42 - 11:01:30 5058
Penticton 10:54:06 -8.8 NT Down 17.4 209.7 Really Low 10:46:42 - 11:01:30 5054
Sleaford 10:53:37 -0.8 CT Down 10.3 221.5 Really Low 10:46:13 - 11:01:01 5047
Oliver 10:54:05 -9.1 NT Down 17.7 209.7 Really Low 10:46:41 - 11:01:29 5039
Anarchist Mountain Observatory 10:54:04 -9.1 NT Down 17.8 210.0 Really Low 10:46:40 - 11:01:28 5031
Victoria 10:54:15 -11.2 NT Down 19.4 206.2 Really Low 10:46:51 - 11:01:39 5031
Okanogan 10:54:03 -9.7 NT Down 18.4 209.8 Really Low 10:46:39 - 11:01:27 5004
Brewster 10:54:04 -10.0 NT Down 18.7 209.7 Really Low 10:46:40 - 11:01:28 4993
Manson/Chelan 10:54:04 -10.3 NT Down 19.0 209.4 Really Low 10:46:40 - 11:01:28 4986
Wenatchee 10:54:04 -10.7 NT Down 19.5 209.3 Really Low 10:46:40 - 11:01:28 4965
Ellensburg 10:54:04 -11.1 NT Down 19.9 209.2 Really Low 10:46:40 - 11:01:28 4948
Yakima 10:54:03 -11.5 NT Down 20.3 209.2 Low 10:46:39 - 11:01:27 4929
Toppenish/White Swan 10:54:02 -11.6 NT Down 20.4 209.4 Low 10:46:38 - 11:01:26 4917
PNWRO 10:53:57 -11.1 NT Down 20.2 210.9 Low 10:46:33 - 11:01:21 4891
The Dalles 10:54:03 -12.5 AT Down 21.3 208.8 Low 10:46:39 - 11:01:27 4884
Maupin 10:54:02 -12.8 AT Down 21.7 209.0 Low 10:46:38 - 11:01:26 4863
Sisters 10:54:02 -13.7 AT Down 22.6 208.7 Low 10:46:38 - 11:01:26 4823
Bend 10:54:01 -13.7 AT Down 22.7 209.0 Low 10:46:37 - 11:01:25 4809
Oregon Observatory 10:54:01 -13.9 AT Down 22.9 208.9 Low 10:46:37 - 11:01:25 4801
Chiloquin 10:54:00 -15.1 AT Down 24.2 208.8 Low 10:46:36 - 11:01:24 4734
Klamath Falls 10:53:59 -15.3 AT Down 24.5 208.9 Low 10:46:35 - 11:01:23 4715
Cedarville 10:53:53 -15.1 AT Down 24.5 210.6 Low 10:46:29 - 11:01:17 4667
Fall River/Burney 10:53:56 -16.1 AT Down 25.4 209.5 Low 10:46:32 - 11:01:20 4647
Greenville 10:53:53 -16.5 AT Down 26.0 210.2 Low 10:46:29 - 11:01:17 4592
Gimple 10:53:53 -16.5 AT Down 26.0 210.3 Low 10:46:29 - 11:01:17 4592
Quincy 10:53:53 -16.7 AT Down 26.2 210.2 Low 10:46:29 - 11:01:17 4580
Portola 10:53:51 -16.5 AT Down 26.1 210.7 Low 10:46:27 - 11:01:15 4570
Reno 10:53:48 -16.4 AT Down 26.1 211.4 Low 10:46:24 - 11:01:12 4550
Carson City 10:53:47 -16.6 AT Down 26.4 211.5 Low 10:46:23 - 11:01:11 4529
Gardnerville 10:53:46 -16.8 AT Down 26.6 211.6 Low 10:46:22 - 11:01:10 4514
Yerington 10:53:45 -16.4 AT Down 26.3 212.2 Low 10:46:21 - 11:01:09 4513
Hawthorne 10:53:42 -16.5 AT Down 26.5 212.8 Low 10:46:18 - 11:01:06 4481
Lee Vining 10:53:42 -17.2 AT Down 27.2 212.5 Low 10:46:18 - 11:01:06 4450
Dunrhomin 10:53:04 -7.6 NT Down 18.7 224.2 Really Low 10:45:40 - 11:00:28 4446
Nikitin 10:53:03 -7.8 NT Down 18.9 224.2 Really Low 10:45:39 - 11:00:27 4435
CU-SBO 10:53:03 -7.9 NT Down 19.0 224.1 Really Low 10:45:39 - 11:00:27 4432
Bishop 10:53:39 -17.2 AT Down 27.4 213.3 Low 10:46:15 - 11:01:03 4407
Beatty 10:53:33 -16.6 AT Down 27.0 215.0 Low 10:46:09 - 11:00:57 4364
Patrick 10:53:20 -16.0 AT Down 26.9 218.0 Low 10:45:56 - 11:00:44 4241
Laughlin/Bullhead City 10:53:22 -16.6 AT Down 27.4 217.5 Low 10:45:58 - 11:00:46 4231
Wildwood 10:53:34 -19.7 Dark Down 30.2 214.1 Up 10:46:10 - 11:00:58 4195
Lake Havasu City 10:53:20 -16.9 AT Down 27.8 217.9 Low 10:45:56 - 11:00:44 4183
Idyllwild 10:53:27 -18.8 Dark Down 29.6 216.0 Low 10:46:03 - 11:00:51 4155
George/Scottsdale 10:53:11 -15.9 AT Down 27.1 220.3 Low 10:45:47 - 11:00:35 4105
Calipatria 10:53:22 -18.5 Dark Down 29.5 217.3 Low 10:45:58 - 11:00:46 4101
Yuma 10:53:18 -18.3 Dark Down 29.4 218.2 Low 10:45:54 - 11:00:42 4062

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, (2026/05/27 10:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.71  47
35Eta Oph      17:10:22.7 -15:43:29  2.6  2.81  56
PPM 232892     17:18:19.3 -16:18:42  5.9  1.85  58
PPM 232796     17:13:54.5 -18:13:08  8.4  0.65  57
PPM 232859     17:16:43.1 -18:08:11  8.9  0.04  57
578992         17:16:35.6 -18:06:52 16.6        57
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:25:17 UT

Marc W. Buie, Southwest Research Institute

RECON