RECON: TNO occultation with 469505

Event between (469505) 03FE128 and star GA0700:07108090 with event index number of 1471033

Geocentric closest approach at 2026/02/17 12:30:39 UTC

J2000 position of star is 16:53:20.3 -19:11:34
Equinox of date position of star is 16:54:46.4 -19:13:53
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 75 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 36.8 AU from the Sun and 37.1 AU from the Earth.
Apparent velocity is 14.0 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 207 seconds.
The 1-sigma cross-track error in the shadow position is 1421 km.
The sky-plane scale is 26888.8 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=322.1 km assuming a 5% albedo -- 23.4 sec chord
Diameter=131.5 km assuming a 30% albedo -- 9.5 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 469505, (2026/02/17 12:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:00.8 -26:29:16  0.9  9.10  79
35Eta Oph      17:11:52.7 -15:45:19  2.6  5.34  71
PPM 232367     16:58:36.2 -19:34:46  6.1  0.95  74
PPM 232254     16:53:52.6 -19:23:57  8.5  0.29  75
PPM 232281     16:55:09.5 -19:13:26  9.7  0.07  75
469505         16:54:52.3 -19:14:03 16.7        75
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 4.4 sigma about the mid-time.
The median site spacing is 14.4 km RECON observability=0.4 and success probability=1.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:28:45 -16.8 AT Down 15.6 155.9 Really Low 12:13:45 - 12:43:45 2663
Kamloops 12:27:38 -26.1 Dark Down 12.1 142.3 Really Low 12:12:38 - 12:42:38 2434
Kelowna 12:27:38 -25.7 Dark Down 13.1 143.0 Really Low 12:12:38 - 12:42:38 2410
Peachland 12:27:36 -26.0 Dark Down 13.0 142.7 Really Low 12:12:36 - 12:42:36 2401
Summerland 12:27:36 -25.9 Dark Down 13.2 142.8 Really Low 12:12:36 - 12:42:36 2395
Penticton 12:27:37 -25.9 Dark Down 13.3 142.8 Really Low 12:12:37 - 12:42:37 2394
Oliver 12:27:35 -26.0 Dark Down 13.6 142.8 Really Low 12:12:35 - 12:42:35 2377
Anarchist Mountain Observatory 12:27:35 -25.9 Dark Down 13.8 142.9 Really Low 12:12:35 - 12:42:35 2373
Okanogan 12:27:32 -26.2 Dark Down 14.2 142.6 Really Low 12:12:32 - 12:42:32 2338
Brewster 12:27:30 -26.3 Dark Down 14.3 142.4 Really Low 12:12:30 - 12:42:30 2322
Manson/Chelan 12:27:28 -26.6 Dark Down 14.3 142.0 Really Low 12:12:28 - 12:42:28 2306
Victoria 12:27:17 -28.6 Dark Down 12.4 139.3 Really Low 12:12:17 - 12:42:17 2286
Wenatchee 12:27:25 -26.9 Dark Down 14.6 141.8 Really Low 12:12:25 - 12:42:25 2280
Ellensburg 12:27:22 -27.1 Dark Down 14.9 141.5 Really Low 12:12:22 - 12:42:22 2256
Yakima 12:27:21 -27.2 Dark Down 15.2 141.4 Really Low 12:12:21 - 12:42:21 2235
PNWRO 12:27:26 -26.2 Dark Down 16.3 142.8 Really Low 12:12:26 - 12:42:26 2231
Toppenish/White Swan 12:27:21 -27.1 Dark Down 15.4 141.6 Really Low 12:12:21 - 12:42:21 2226
The Dalles 12:27:15 -27.8 Dark Down 15.7 140.7 Really Low 12:12:15 - 12:42:15 2172
Maupin 12:27:14 -27.9 Dark Down 16.0 140.7 Really Low 12:12:14 - 12:42:14 2152
Dunrhomin 12:28:19 -16.4 AT Down 26.5 154.7 Low 12:13:19 - 12:43:19 2099
Sisters 12:27:09 -28.4 Dark Down 16.5 140.1 Really Low 12:12:09 - 12:42:09 2096
Nikitin 12:28:19 -16.4 AT Down 26.7 154.6 Low 12:13:19 - 12:43:19 2089
Bend 12:27:08 -28.3 Dark Down 16.8 140.3 Really Low 12:12:08 - 12:42:08 2087
CU-SBO 12:28:18 -16.5 AT Down 26.7 154.5 Low 12:13:18 - 12:43:18 2084
Oregon Observatory 12:27:07 -28.4 Dark Down 16.8 140.1 Really Low 12:12:07 - 12:42:07 2076
Chiloquin 12:27:00 -29.0 Dark Down 17.6 139.5 Really Low 12:12:00 - 12:42:00 1993
Klamath Falls 12:26:59 -29.0 Dark Down 17.9 139.5 Really Low 12:11:59 - 12:41:59 1974
Cedarville 12:27:04 -27.9 Dark Down 19.2 140.7 Really Low 12:12:04 - 12:42:04 1961
Fall River/Burney 12:26:57 -28.9 Dark Down 19.0 139.6 Really Low 12:11:57 - 12:41:57 1910
Gimple 12:26:56 -28.7 Dark Down 20.0 139.8 Really Low 12:11:56 - 12:41:56 1864
Greenville 12:26:56 -28.7 Dark Down 19.9 139.7 Really Low 12:11:56 - 12:41:56 1863
Portola 12:26:57 -28.4 Dark Down 20.4 140.1 Low 12:11:57 - 12:41:57 1851
Quincy 12:26:55 -28.7 Dark Down 20.1 139.7 Low 12:11:55 - 12:41:55 1850
Reno 12:27:00 -27.9 Dark Down 20.9 140.6 Low 12:12:00 - 12:42:00 1846
Carson City 12:26:59 -28.0 Dark Down 21.2 140.5 Low 12:11:59 - 12:41:59 1824
Yerington 12:27:01 -27.5 Dark Down 21.7 141.0 Low 12:12:01 - 12:42:01 1823
Gardnerville 12:26:58 -28.0 Dark Down 21.4 140.5 Low 12:11:58 - 12:41:58 1809
Hawthorne 12:27:02 -27.1 Dark Down 22.3 141.4 Low 12:12:02 - 12:42:02 1802
Lee Vining 12:26:58 -27.6 Dark Down 22.5 140.8 Low 12:11:58 - 12:41:58 1758
Bishop 12:26:59 -27.1 Dark Down 23.3 141.3 Low 12:11:59 - 12:41:59 1731
Beatty 12:27:07 -25.8 Dark Down 24.5 142.6 Low 12:12:07 - 12:42:07 1729
Patrick 12:27:18 -23.5 Dark Down 27.1 144.8 Low 12:12:18 - 12:42:18 1677
Laughlin/Bullhead City 12:27:14 -24.1 Dark Down 27.0 144.1 Low 12:12:14 - 12:42:14 1649
Lake Havasu City 12:27:14 -23.9 Dark Down 27.6 144.1 Low 12:12:14 - 12:42:14 1607
George/Scottsdale 12:27:26 -21.9 Dark Down 29.5 146.2 Low 12:12:26 - 12:42:26 1592
Idyllwild 12:26:58 -26.0 Dark Down 27.0 141.7 Low 12:11:58 - 12:41:58 1514
Wildwood 12:26:49 -27.6 Dark Down 25.7 140.1 Low 12:11:49 - 12:41:49 1505
Calipatria 12:27:03 -25.0 Dark Down 28.1 142.6 Low 12:12:03 - 12:42:03 1490
Yuma 12:27:07 -24.3 Dark Down 28.9 143.2 Low 12:12:07 - 12:42:07 1475

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 469505, (2026/02/17 12:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.10  79
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.34  71
PPM 232367     16:57:03.9 -19:32:25  6.1  0.95  74
PPM 232254     16:52:20.5 -19:21:26  8.5  0.29  75
PPM 232281     16:53:37.4 -19:10:59  9.7  0.07  75
469505         16:53:20.3 -19:11:34 16.7        75
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:25:22 UT

Marc W. Buie, Southwest Research Institute

RECON