RECON: TNO occultation with 26181

Event between (26181) 96GQ21 and star GA0780:05518145 with event index number of 1700347

Geocentric closest approach at 2027/06/05 10:17:16 UTC

J2000 position of star is 16:47:31.3 -10:42:50
Equinox of date position of star is 16:48:52.5 -10:45:21
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 161 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 47.6 AU from the Sun and 46.6 AU from the Earth.
Apparent velocity is 24.5 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 98 seconds.
The 1-sigma cross-track error in the shadow position is 1756 km.
The sky-plane scale is 33795.7 km/arcsec.

The object has an absolute magnitude Hv=4.8
Diameter=625.2 km assuming a 5% albedo -- 26.3 sec chord
Diameter=255.2 km assuming a 30% albedo -- 10.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 26181, (2027/06/05 10:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.6 -26:29:25  0.9 16.29 167
13Zet Oph      16:38:40.3 -10:37:14  2.6  2.55 160
20 Oph         16:51:21.2 -10:49:45  4.6  0.57 161
PPM 232116     16:46:52.3 -10:42:50  8.4  0.53 161
PPM 232150     16:48:22.4 -10:42:35  9.5  0.17 161
26181          16:49:02.2 -10:45:39 14.9       161
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 26.9 km RECON observability=0.6 and success probability=25.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:15:47 -4.3 CT Down 14.1 230.7 Really Low 10:07:09 - 10:24:25 -55
Kamloops 10:16:13 -10.9 NT Down 21.3 217.7 Low 10:07:35 - 10:24:51 -102
Kelowna 10:16:09 -11.2 NT Down 21.6 218.7 Low 10:07:31 - 10:24:47 -142
Peachland 10:16:10 -11.4 NT Down 21.8 218.5 Low 10:07:32 - 10:24:48 -147
Summerland 10:16:09 -11.5 NT Down 21.9 218.6 Low 10:07:31 - 10:24:47 -155
Penticton 10:16:09 -11.5 NT Down 21.9 218.7 Low 10:07:31 - 10:24:47 -158
Oliver 10:16:08 -11.8 NT Down 22.2 218.8 Low 10:07:30 - 10:24:46 -176
Anarchist Mountain Observatory 10:16:07 -11.9 NT Down 22.2 219.1 Low 10:07:29 - 10:24:45 -185
Victoria 10:16:16 -13.7 AT Down 24.2 215.3 Low 10:07:38 - 10:24:54 -214
Okanogan 10:16:06 -12.5 AT Down 22.8 219.0 Low 10:07:28 - 10:24:44 -219
Brewster 10:16:06 -12.8 AT Down 23.1 218.9 Low 10:07:28 - 10:24:44 -233
Manson/Chelan 10:16:07 -13.2 AT Down 23.4 218.6 Low 10:07:29 - 10:24:45 -244
Wenatchee 10:16:06 -13.6 AT Down 23.9 218.5 Low 10:07:28 - 10:24:44 -270
Ellensburg 10:16:06 -14.0 AT Down 24.3 218.4 Low 10:07:28 - 10:24:44 -293
Yakima 10:16:05 -14.4 AT Down 24.6 218.5 Low 10:07:27 - 10:24:43 -315
Toppenish/White Swan 10:16:04 -14.5 AT Down 24.7 218.8 Low 10:07:26 - 10:24:42 -327
PNWRO 10:15:59 -14.3 AT Down 24.4 220.3 Low 10:07:21 - 10:24:37 -347
The Dalles 10:16:04 -15.5 AT Down 25.7 218.2 Low 10:07:26 - 10:24:42 -372
Maupin 10:16:03 -15.8 AT Down 26.0 218.4 Low 10:07:25 - 10:24:41 -396
Sisters 10:16:02 -16.7 AT Down 26.9 218.2 Low 10:07:24 - 10:24:40 -448
Bend 10:16:01 -16.8 AT Down 26.9 218.5 Low 10:07:23 - 10:24:39 -461
Oregon Observatory 10:16:01 -17.0 AT Down 27.1 218.5 Low 10:07:23 - 10:24:39 -472
Chiloquin 10:16:00 -18.3 Dark Down 28.4 218.5 Low 10:07:22 - 10:24:38 -553
Klamath Falls 10:15:59 -18.6 Dark Down 28.6 218.7 Low 10:07:21 - 10:24:37 -574
Cedarville 10:15:53 -18.5 Dark Down 28.4 220.5 Low 10:07:15 - 10:24:31 -617
Fall River/Burney 10:15:55 -19.4 Dark Down 29.3 219.5 Low 10:07:17 - 10:24:33 -649
Greenville 10:15:52 -20.0 Dark Down 29.8 220.2 Low 10:07:14 - 10:24:30 -708
Gimple 10:15:52 -20.0 Dark Down 29.8 220.3 Low 10:07:14 - 10:24:30 -708
Quincy 10:15:52 -20.2 Dark Down 30.0 220.3 Low 10:07:14 - 10:24:30 -721
Dunrhomin 10:15:12 -12.4 AT Down 21.0 234.2 Low 10:06:34 - 10:23:50 -727
Portola 10:15:50 -20.1 Dark Down 29.8 220.8 Low 10:07:12 - 10:24:28 -729
Nikitin 10:15:11 -12.5 AT Down 21.1 234.2 Low 10:06:33 - 10:23:49 -739
CU-SBO 10:15:11 -12.6 AT Down 21.2 234.1 Low 10:06:33 - 10:23:49 -743
Reno 10:15:48 -20.0 Dark Down 29.7 221.5 Low 10:07:10 - 10:24:26 -746
Carson City 10:15:47 -20.3 Dark Down 30.0 221.7 Low 10:07:09 - 10:24:25 -770
Yerington 10:15:45 -20.2 Dark Down 29.8 222.4 Low 10:07:07 - 10:24:23 -783
Gardnerville 10:15:46 -20.5 Dark Down 30.1 221.8 Up 10:07:08 - 10:24:24 -787
Hawthorne 10:15:42 -20.4 Dark Down 29.9 223.0 Low 10:07:04 - 10:24:20 -815
Lee Vining 10:15:43 -21.1 Dark Down 30.5 222.8 Up 10:07:05 - 10:24:21 -853
Bishop 10:15:39 -21.2 Dark Down 30.6 223.7 Up 10:07:01 - 10:24:17 -895
Beatty 10:15:34 -20.8 Dark Down 30.0 225.4 Up 10:06:56 - 10:24:12 -929
Patrick 10:15:22 -20.6 Dark Down 29.3 228.6 Low 10:06:44 - 10:24:00 -1039
Laughlin/Bullhead City 10:15:24 -21.1 Dark Down 29.9 228.1 Low 10:06:46 - 10:24:02 -1056
Lake Havasu City 10:15:21 -21.5 Dark Down 30.2 228.6 Up 10:06:43 - 10:23:59 -1106
Wildwood 10:15:33 -24.0 Dark Down 33.1 224.9 Up 10:06:55 - 10:24:11 -1133
Idyllwild 10:15:27 -23.3 Dark Down 32.2 226.8 Up 10:06:49 - 10:24:05 -1160
George/Scottsdale 10:15:13 -20.8 Dark Down 29.2 231.0 Low 10:06:35 - 10:23:51 -1169
Calipatria 10:15:22 -23.2 Dark Down 31.9 228.1 Up 10:06:44 - 10:24:00 -1208
Yuma 10:15:19 -23.1 Dark Down 31.6 229.1 Up 10:06:41 - 10:23:57 -1242

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, (2027/06/05 10:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.29 167
13Zet Oph      16:37:09.6 -10:34:01  2.6  2.55 160
20 Oph         16:49:50.2 -10:47:01  4.6  0.57 161
PPM 232116     16:45:21.4 -10:39:56  8.4  0.53 161
PPM 232150     16:46:51.5 -10:39:45  9.5  0.17 161
26181          16:47:31.3 -10:42:50 14.9       161
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:28:41 UT

Marc W. Buie, Southwest Research Institute

RECON