RECON: TNO occultation with 579077

Event between (579077) 14LP28 and star GA0860:16886507 with event index number of 2557939

Geocentric closest approach at 2026/09/15 02:26:43 UTC

J2000 position of star is 22:42:12.1 -03:05:17
Equinox of date position of star is 22:43:22.9 -02:58:05
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 121 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 39.4 AU from the Sun and 38.4 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 163 seconds.
The 1-sigma cross-track error in the shadow position is 2055 km.
The sky-plane scale is 27826.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.3
Diameter=332.7 km assuming a 5% albedo -- 13.8 sec chord
Diameter=135.8 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 579077, (2026/09/15 02:26UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:07.1 -29:28:48  1.2 26.79 110
Markab         23:06:05.6 +15:20:58  2.5 19.13 132
PPM 206643     22:42:10.8 -03:24:52  6.5  0.58 120
PPM 206664     22:43:29.5 -03:20:00  7.6  0.39 121
PPM 206677     22:44:12.7 -02:54:11  9.5  0.16 121
579077         22:43:34.8 -02:56:52 16.5       121
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 0.0 km RECON observability=0.0 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 02:27:33 -2.5 CT Up 10.1 107.7 Really Low 02:13:26 - 02:41:40 2213
Victoria 02:27:34 -0.8 Sun up Up 8.8 104.9 Really Low 02:13:27 - 02:41:41 2189
Kelowna 02:27:34 -3.2 CT Up 10.9 108.3 Really Low 02:13:27 - 02:41:41 2184
Peachland 02:27:34 -3.0 CT Up 10.7 108.0 Really Low 02:13:27 - 02:41:41 2184
Summerland 02:27:34 -3.1 CT Up 10.8 108.0 Really Low 02:13:27 - 02:41:41 2179
Penticton 02:27:34 -3.2 CT Up 10.9 108.1 Really Low 02:13:27 - 02:41:41 2177
Oliver 02:27:34 -3.2 CT Up 11.0 108.1 Really Low 02:13:27 - 02:41:41 2168
Anarchist Mountain Observatory 02:27:34 -3.4 CT Up 11.2 108.2 Really Low 02:13:27 - 02:41:41 2163
Okanogan 02:27:34 -3.3 CT Up 11.3 107.9 Really Low 02:13:27 - 02:41:41 2150
Brewster 02:27:34 -3.2 CT Up 11.2 107.7 Really Low 02:13:27 - 02:41:41 2146
Manson/Chelan 02:27:34 -3.0 CT Up 11.1 107.3 Really Low 02:13:27 - 02:41:41 2146
Wenatchee 02:27:34 -3.0 CT Up 11.1 107.1 Really Low 02:13:27 - 02:41:41 2139
Ellensburg 02:27:34 -2.9 CT Up 11.1 106.9 Really Low 02:13:27 - 02:41:41 2135
Yakima 02:27:34 -2.9 CT Up 11.2 106.8 Really Low 02:13:27 - 02:41:41 2129
Toppenish/White Swan 02:27:34 -3.0 CT Up 11.4 106.9 Really Low 02:13:27 - 02:41:41 2124
PNWRO 02:27:34 -4.1 CT Up 12.5 108.0 Really Low 02:13:27 - 02:41:41 2099
Sleaford 02:27:10 -10.8 NT Down 17.7 120.1 Really Low 02:13:03 - 02:41:17 2091
The Dalles 02:27:55 -2.7 CT Up 11.1 106.2 Really Low 02:13:48 - 02:42:02 2063
Maupin 02:27:57 -2.8 CT Up 11.3 106.2 Really Low 02:13:50 - 02:42:04 2048
Sisters 02:28:01 -2.6 CT Up 11.2 105.7 Really Low 02:13:54 - 02:42:08 2020
Bend 02:28:01 -2.8 CT Up 11.5 105.8 Really Low 02:13:54 - 02:42:08 2009
Oregon Observatory 02:28:02 -2.7 CT Up 11.4 105.7 Really Low 02:13:55 - 02:42:09 2004
Chiloquin 02:28:08 -2.6 CT Up 11.5 105.2 Really Low 02:14:01 - 02:42:15 1955
Klamath Falls 02:28:09 -2.7 CT Up 11.6 105.1 Really Low 02:14:02 - 02:42:16 1941
Cedarville 02:28:11 -4.0 CT Up 13.0 106.2 Really Low 02:14:04 - 02:42:18 1898
Fall River/Burney 02:28:14 -3.1 CT Up 12.2 105.2 Really Low 02:14:07 - 02:42:21 1887
Greenville 02:28:16 -3.6 CT Up 12.8 105.3 Really Low 02:14:09 - 02:42:23 1844
Gimple 02:28:17 -3.6 CT Up 12.9 105.4 Really Low 02:14:10 - 02:42:24 1843
Quincy 02:28:17 -3.6 CT Up 12.9 105.3 Really Low 02:14:10 - 02:42:24 1834
Portola 02:28:18 -4.0 CT Up 13.3 105.6 Really Low 02:14:11 - 02:42:25 1825
Reno 02:28:18 -4.5 CT Up 13.8 106.0 Really Low 02:14:11 - 02:42:25 1806
Carson City 02:28:20 -4.6 CT Up 13.9 105.9 Really Low 02:14:13 - 02:42:27 1790
Gardnerville 02:28:20 -4.7 CT Up 14.0 105.9 Really Low 02:14:13 - 02:42:27 1778
Yerington 02:28:20 -5.1 CT Up 14.5 106.3 Really Low 02:14:13 - 02:42:27 1774
Hawthorne 02:28:21 -5.6 CT Up 15.0 106.5 Really Low 02:14:14 - 02:42:28 1746
Lee Vining 02:28:23 -5.3 CT Up 14.8 106.1 Really Low 02:14:16 - 02:42:30 1725
Bishop 02:28:24 -5.9 CT Up 15.5 106.4 Really Low 02:14:17 - 02:42:31 1687
Beatty 02:28:24 -7.3 NT Up 16.9 107.4 Really Low 02:14:17 - 02:42:31 1644
Dunrhomin 02:27:53 -15.2 AT Up 23.9 117.0 Low 02:13:46 - 02:42:00 1634
CU-SBO 02:27:54 -15.2 AT Up 24.0 116.8 Low 02:13:47 - 02:42:01 1624
Patrick 02:28:26 -9.9 NT Up 19.6 108.9 Really Low 02:14:19 - 02:42:33 1528
Laughlin/Bullhead City 02:28:28 -9.4 NT Up 19.1 108.3 Really Low 02:14:21 - 02:42:35 1524
Wildwood 02:28:38 -6.3 NT Up 16.3 105.4 Really Low 02:14:31 - 02:42:45 1515
Lake Havasu City 02:28:30 -9.7 NT Up 19.5 108.3 Really Low 02:14:23 - 02:42:37 1484
Idyllwild 02:28:36 -7.9 NT Up 17.9 106.5 Really Low 02:14:29 - 02:42:43 1474
Calipatria 02:28:37 -9.0 NT Up 19.0 107.0 Really Low 02:14:30 - 02:42:44 1422
George/Scottsdale 02:28:29 -11.8 NT Up 21.7 109.6 Low 02:14:22 - 02:42:36 1403
Yuma 02:28:37 -9.8 NT Up 19.9 107.5 Really Low 02:14:30 - 02:42:44 1385

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 579077, (2026/09/15 02:26UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 26.79 110
Markab         23:04:45.8 +15:12:18  2.5 19.13 132
PPM 206643     22:40:48.0 -03:33:16  6.5  0.58 120
PPM 206664     22:42:06.7 -03:28:25  7.6  0.39 121
PPM 206677     22:42:50.0 -03:02:36  9.5  0.16 121
579077         22:42:12.1 -03:05:17 16.5       121
Positions are for J2000

Event circumstances last updated at 2022/11/13 04:03:11 UT

Marc W. Buie, Southwest Research Institute

RECON