RECON: TNO occultation with 26181

Event between (26181) 96GQ21 and star GA0780:05564828 with event index number of 1906179

Geocentric closest approach at 2028/06/24 06:38:53 UTC

J2000 position of star is 16:51:17.7 -10:41:05
Equinox of date position of star is 16:52:38.9 -10:43:29
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 138 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 48.0 AU from the Sun and 47.1 AU from the Earth.
Apparent velocity is 22.8 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 113 seconds.
The 1-sigma cross-track error in the shadow position is 1708 km.
The sky-plane scale is 34161.3 km/arcsec.

The object has an absolute magnitude Hv=4.8
Diameter=625.2 km assuming a 5% albedo -- 28.3 sec chord
Diameter=255.2 km assuming a 30% albedo -- 11.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 26181, (2028/06/24 06:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.5 -26:29:33  0.9 16.57 136
13Zet Oph      16:38:43.8 -10:37:21  2.6  3.48 135
20 Oph         16:51:24.7 -10:49:51  4.6  0.37 138
PPM 232273     16:54:45.8 -11:43:03  8.5  1.09 139
PPM 232245     16:53:26.2 -10:40:28  9.1  0.15 138
26181          16:52:52.2 -10:43:52 14.1       139
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=0.9 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)
Sleaford 06:38:26 -14.3 AT Down 26.1 195.1 Low 06:28:33 - 06:48:19 7918
Kamloops 06:39:08 -13.6 AT Down 28.6 179.5 Low 06:29:15 - 06:49:01 7812
Kelowna 06:39:05 -14.6 AT Down 29.5 180.5 Low 06:29:12 - 06:48:58 7772
Peachland 06:39:06 -14.6 AT Down 29.6 180.1 Low 06:29:13 - 06:48:59 7765
Summerland 06:39:06 -14.8 AT Down 29.7 180.3 Low 06:29:13 - 06:48:59 7757
Penticton 06:39:06 -14.8 AT Down 29.8 180.4 Low 06:29:13 - 06:48:59 7754
Oliver 06:39:05 -15.2 AT Down 30.1 180.4 Up 06:29:12 - 06:48:58 7734
Anarchist Mountain Observatory 06:39:04 -15.4 AT Down 30.3 180.6 Up 06:29:11 - 06:48:57 7726
Okanogan 06:39:05 -15.9 AT Down 30.9 180.4 Up 06:29:12 - 06:48:58 7688
Victoria 06:39:18 -14.9 AT Down 30.7 176.0 Up 06:29:25 - 06:49:11 7680
Brewster 06:39:06 -16.1 AT Down 31.2 180.1 Up 06:29:13 - 06:48:59 7671
Manson/Chelan 06:39:07 -16.3 AT Down 31.4 179.7 Up 06:29:14 - 06:49:00 7658
Wenatchee 06:39:08 -16.7 AT Down 31.9 179.5 Up 06:29:15 - 06:49:01 7630
Ellensburg 06:39:08 -17.0 AT Down 32.3 179.3 Up 06:29:15 - 06:49:01 7604
Yakima 06:39:08 -17.4 AT Down 32.7 179.2 Up 06:29:15 - 06:49:01 7580
Toppenish/White Swan 06:39:08 -17.6 AT Down 32.9 179.4 Up 06:29:15 - 06:49:01 7568
PNWRO 06:39:02 -18.3 Dark Down 33.3 181.2 Up 06:29:09 - 06:48:55 7552
The Dalles 06:39:11 -18.2 Dark Down 33.7 178.5 Up 06:29:18 - 06:49:04 7517
Maupin 06:39:10 -18.6 Dark Down 34.1 178.6 Up 06:29:17 - 06:49:03 7491
Sisters 06:39:12 -19.3 Dark Down 35.0 178.0 Up 06:29:19 - 06:49:05 7434
Bend 06:39:10 -19.6 Dark Down 35.2 178.3 Up 06:29:17 - 06:49:03 7420
Oregon Observatory 06:39:11 -19.7 Dark Down 35.4 178.2 Up 06:29:18 - 06:49:04 7408
Chiloquin 06:39:12 -20.8 Dark Down 36.7 177.6 Up 06:29:19 - 06:49:05 7320
Klamath Falls 06:39:12 -21.1 Dark Down 37.1 177.7 Up 06:29:19 - 06:49:05 7298
Cedarville 06:39:06 -22.2 Dark Down 37.8 179.7 Up 06:29:13 - 06:48:59 7259
Fall River/Burney 06:39:11 -22.3 Dark Down 38.3 178.1 Up 06:29:18 - 06:49:04 7219
Dunrhomin 06:38:12 -26.1 Dark Down 37.3 198.0 Up 06:28:19 - 06:48:05 7210
Nikitin 06:38:12 -26.3 Dark Down 37.5 198.1 Up 06:28:19 - 06:48:05 7197
CU-SBO 06:38:12 -26.3 Dark Down 37.6 198.0 Up 06:28:19 - 06:48:05 7192
Gimple 06:39:09 -23.3 Dark Down 39.2 178.8 Up 06:29:16 - 06:49:02 7159
Greenville 06:39:09 -23.3 Dark Down 39.2 178.7 Up 06:29:16 - 06:49:02 7159
Quincy 06:39:09 -23.5 Dark Down 39.4 178.7 Up 06:29:16 - 06:49:02 7145
Portola 06:39:07 -23.7 Dark Down 39.5 179.3 Up 06:29:14 - 06:49:00 7138
Reno 06:39:05 -24.2 Dark Down 39.8 180.1 Up 06:29:12 - 06:48:58 7122
Carson City 06:39:04 -24.5 Dark Down 40.1 180.1 Up 06:29:11 - 06:48:57 7097
Yerington 06:39:03 -24.9 Dark Down 40.3 180.9 Up 06:29:10 - 06:48:56 7086
Gardnerville 06:39:05 -24.7 Dark Down 40.4 180.2 Up 06:29:12 - 06:48:58 7080
Hawthorne 06:39:01 -25.4 Dark Down 40.8 181.6 Up 06:29:08 - 06:48:54 7055
Lee Vining 06:39:02 -25.8 Dark Down 41.3 181.0 Up 06:29:09 - 06:48:55 7012
Bishop 06:39:00 -26.6 Dark Down 41.9 181.9 Up 06:29:07 - 06:48:53 6971
Beatty 06:38:53 -27.4 Dark Down 42.3 184.1 Up 06:29:00 - 06:48:46 6943
Patrick 06:38:41 -29.5 Dark Down 43.6 188.1 Up 06:28:48 - 06:48:34 6841
Laughlin/Bullhead City 06:38:44 -29.6 Dark Down 43.9 187.1 Up 06:28:51 - 06:48:37 6819
Lake Havasu City 06:38:42 -30.3 Dark Down 44.5 187.6 Up 06:28:49 - 06:48:35 6768
Wildwood 06:38:59 -29.6 Dark Down 45.2 181.8 Up 06:29:06 - 06:48:52 6720
George/Scottsdale 06:38:32 -31.6 Dark Down 45.0 191.0 Up 06:28:39 - 06:48:25 6714
Idyllwild 06:38:52 -30.5 Dark Down 45.5 184.4 Up 06:28:59 - 06:48:45 6700
Calipatria 06:38:47 -31.3 Dark Down 46.0 186.1 Up 06:28:54 - 06:48:40 6656
Yuma 06:38:43 -32.0 Dark Down 46.3 187.4 Up 06:28:50 - 06:48:36 6624

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 26181, (2028/06/24 06:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.57 136
13Zet Oph      16:37:09.6 -10:34:01  2.6  3.48 135
20 Oph         16:49:50.2 -10:47:01  4.6  0.37 138
PPM 232273     16:53:10.7 -11:40:21  8.5  1.09 139
PPM 232245     16:51:51.8 -10:37:43  9.1  0.15 138
26181          16:51:17.7 -10:41:05 14.1       138
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:30:12 UT

Marc W. Buie, Southwest Research Institute

RECON