RECON: TNO occultation with 26308

Event between (26308) 98SM165 and star GA0960:00283013 with event index number of 1302041

Geocentric closest approach at 2023/11/09 10:35:59 UTC

J2000 position of star is 03:19:20.1 +07:53:48
Equinox of date position of star is 03:20:36.8 +07:58:55
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 131 degrees from the moon. Moon is 15% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 42.8 AU from the Sun and 41.8 AU from the Earth.
Apparent velocity is 25.6 km/sec on the sky relative to the star, or, 3.0 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 1583 km.
The sky-plane scale is 30348.0 km/arcsec.

The object has an absolute magnitude Hv=5.8
Diameter=415.0 km assuming a 5% albedo -- 16.4 sec chord
Diameter=169.4 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is 2:1E+6:3EII
 
 
 
 
 
 

Star training set for 26308, (2023/11/09 10:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:17.5 +16:33:20  0.8 20.58 112
Menkar         03:03:31.8 +04:10:55  2.5  5.70 136
1Omi Tau       03:26:06.0 +09:06:41  3.6  1.76 130
PPM 146480     03:22:17.8 +08:32:08  8.0  0.69 131
PPM 146453     03:20:57.3 +08:06:09 10.0  0.15 131
26308          03:20:36.8 +07:58:55 13.8       131
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 31.9 km RECON observability=1.0 and success probability=27.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:33:13 -33.6 Dark Up 29.5 242.0 Low 10:25:46 - 10:40:40 2247
Kamloops 10:33:39 -42.4 Dark Down 37.6 228.2 Up 10:26:12 - 10:41:06 2240
Kelowna 10:33:36 -42.3 Dark Down 37.7 229.6 Up 10:26:09 - 10:41:03 2155
Peachland 10:33:37 -42.5 Dark Down 37.9 229.3 Up 10:26:10 - 10:41:04 2149
Summerland 10:33:37 -42.5 Dark Down 38.0 229.5 Up 10:26:10 - 10:41:04 2134
Penticton 10:33:36 -42.5 Dark Down 38.0 229.7 Up 10:26:09 - 10:41:03 2126
Oliver 10:33:36 -42.7 Dark Down 38.2 229.9 Up 10:26:09 - 10:41:03 2094
Victoria 10:33:44 -45.2 Dark Down 40.5 226.0 Up 10:26:17 - 10:41:11 2079
Anarchist Mountain Observatory 10:33:35 -42.6 Dark Down 38.2 230.2 Up 10:26:08 - 10:41:02 2076
Okanogan 10:33:35 -43.0 Dark Down 38.8 230.4 Up 10:26:08 - 10:41:02 2018
Brewster 10:33:35 -43.3 Dark Down 39.0 230.3 Up 10:26:08 - 10:41:02 1995
Manson/Chelan 10:33:36 -43.6 Dark Down 39.4 230.0 Up 10:26:09 - 10:41:03 1980
Wenatchee 10:33:36 -43.9 Dark Down 39.7 230.2 Up 10:26:09 - 10:41:03 1937
Ellensburg 10:33:36 -44.2 Dark Down 40.1 230.2 Up 10:26:09 - 10:41:03 1901
Yakima 10:33:36 -44.4 Dark Down 40.4 230.4 Up 10:26:09 - 10:41:03 1863
Toppenish/White Swan 10:33:35 -44.4 Dark Down 40.4 230.8 Up 10:26:08 - 10:41:02 1840
PNWRO 10:33:31 -43.7 Dark Down 39.9 232.6 Up 10:26:04 - 10:40:58 1787
The Dalles 10:33:36 -45.3 Dark Down 41.4 230.4 Up 10:26:09 - 10:41:03 1775
Maupin 10:33:36 -45.4 Dark Down 41.6 230.8 Up 10:26:09 - 10:41:03 1734
Sisters 10:33:36 -46.1 Dark Down 42.4 230.9 Up 10:26:09 - 10:41:03 1656
Bend 10:33:36 -46.0 Dark Down 42.4 231.3 Up 10:26:09 - 10:41:03 1629
Oregon Observatory 10:33:36 -46.2 Dark Down 42.6 231.3 Up 10:26:09 - 10:41:03 1614
Chiloquin 10:33:36 -47.0 Dark Down 43.6 231.8 Up 10:26:09 - 10:41:03 1491
Klamath Falls 10:33:36 -47.1 Dark Down 43.8 232.2 Up 10:26:09 - 10:41:03 1456
Cedarville 10:33:31 -46.2 Dark Down 43.3 234.4 Up 10:26:04 - 10:40:58 1366
Fall River/Burney 10:33:34 -47.3 Dark Down 44.3 233.5 Up 10:26:07 - 10:41:01 1334
Greenville 10:33:33 -47.3 Dark Down 44.6 234.7 Up 10:26:06 - 10:41:00 1238
Gimple 10:33:32 -47.2 Dark Down 44.5 234.8 Up 10:26:05 - 10:40:59 1236
Quincy 10:33:32 -47.4 Dark Down 44.7 234.9 Up 10:26:05 - 10:40:59 1217
Portola 10:33:31 -47.1 Dark Down 44.4 235.5 Up 10:26:04 - 10:40:58 1198
Reno 10:33:29 -46.7 Dark Down 44.2 236.4 Up 10:26:02 - 10:40:56 1163
Carson City 10:33:29 -46.8 Dark Down 44.4 236.7 Up 10:26:02 - 10:40:56 1126
Gardnerville 10:33:29 -46.8 Dark Down 44.5 236.9 Up 10:26:02 - 10:40:56 1101
Yerington 10:33:27 -46.4 Dark Down 44.1 237.5 Up 10:26:00 - 10:40:54 1098
Dunrhomin 10:32:55 -35.7 Dark Up 34.0 249.3 Up 10:25:28 - 10:40:22 1088
Nikitin 10:32:55 -35.8 Dark Up 34.0 249.4 Up 10:25:28 - 10:40:22 1069
CU-SBO 10:32:55 -35.8 Dark Up 34.1 249.4 Up 10:25:28 - 10:40:22 1063
Hawthorne 10:33:25 -46.1 Dark Down 44.0 238.4 Up 10:25:58 - 10:40:52 1044
Lee Vining 10:33:26 -46.7 Dark Down 44.6 238.4 Up 10:25:59 - 10:40:53 993
Bishop 10:33:24 -46.3 Dark Down 44.4 239.6 Up 10:25:57 - 10:40:51 922
Beatty 10:33:20 -45.2 Dark Down 43.5 241.6 Up 10:25:53 - 10:40:47 853
Patrick 10:33:11 -43.2 Dark Up 42.1 245.5 Up 10:25:44 - 10:40:38 664
Laughlin/Bullhead City 10:33:13 -43.8 Dark Up 42.7 245.0 Up 10:25:46 - 10:40:40 646
Wildwood 10:33:24 -47.3 Dark Down 46.1 242.3 Up 10:25:57 - 10:40:51 585
Lake Havasu City 10:33:12 -43.7 Dark Up 42.8 245.8 Up 10:25:45 - 10:40:39 573
Idyllwild 10:33:18 -45.8 Dark Down 44.9 244.4 Up 10:25:51 - 10:40:45 523
George/Scottsdale 10:33:06 -41.9 Dark Up 41.3 248.5 Up 10:25:39 - 10:40:33 463
Calipatria 10:33:15 -45.0 Dark Up 44.3 246.0 Up 10:25:48 - 10:40:42 443
Yuma 10:33:12 -44.3 Dark Up 43.8 247.1 Up 10:25:45 - 10:40:39 386

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 26308, (2023/11/09 10:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.58 112
Menkar         03:02:16.8 +04:05:21  2.5  5.70 136
1Omi Tau       03:24:48.7 +09:01:42  3.6  1.76 130
PPM 146480     03:21:00.8 +08:27:03  8.0  0.69 131
PPM 146453     03:19:40.5 +08:01:02 10.0  0.15 131
26308          03:19:20.1 +07:53:48 13.8       131
Positions are for J2000

Event circumstances last updated at 2023/11/06 05:15:11 UT

Marc W. Buie, Southwest Research Institute

RECON