RECON: TNO occultation with 456826

Event between (456826) 07TH422 and star GA1140:02256396 with event index number of 2288088

Geocentric closest approach at 2026/02/06 07:42:10 UTC

J2000 position of star is 06:28:24.2 +24:01:29
Equinox of date position of star is 06:29:45.9 +24:00:33
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 95 degrees from the moon. Moon is 79% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 30.7 AU from the Sun and 30.0 AU from the Earth.
The TNO is moving 18.1 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 515 seconds.
The 1-sigma cross-track error in the shadow position is 4703 km.
The sky-plane scale is 21742.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 10.2 sec chord
Diameter=75.3 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 456826, (2026/02/06 07:42UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.8 +27:57:40  1.1 17.71  79
Alhena         06:39:13.2 +16:22:29  1.9  7.93  92
PPM 095944     06:27:08.2 +23:18:37  6.0  0.96  96
PPM 095980     06:28:35.6 +23:42:58  8.5  0.43  96
PPM 096015     06:29:34.3 +23:39:01  8.6  0.37  95
PPM 096043     06:30:31.7 +23:47:55 10.1  0.24  95
456826         06:29:59.9 +24:00:23 15.8        95
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 1.7 sigma about the mid-time.
The median site spacing is 19.6 km RECON observability=1.0 and success probability=7.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:40:06 -53.2 Dark Up 43.9 251.6 Up 07:25:06 - 07:55:06 7606
Kamloops 07:40:39 -54.2 Dark Up 52.6 237.5 Up 07:25:39 - 07:55:39 7093
Kelowna 07:40:33 -55.1 Dark Up 52.5 239.5 Up 07:25:33 - 07:55:33 7049
Peachland 07:40:33 -55.2 Dark Up 52.7 239.2 Up 07:25:33 - 07:55:33 7032
Summerland 07:40:33 -55.4 Dark Up 52.8 239.5 Up 07:25:33 - 07:55:33 7022
Penticton 07:40:33 -55.4 Dark Up 52.7 239.7 Up 07:25:33 - 07:55:33 7020
Oliver 07:40:31 -55.8 Dark Up 52.9 240.1 Up 07:25:31 - 07:55:31 6990
Anarchist Mountain Observatory 07:40:30 -56.0 Dark Up 52.9 240.5 Up 07:25:30 - 07:55:30 6981
Tonasket 07:40:29 -56.3 Dark Up 53.1 240.8 Up 07:25:29 - 07:55:29 6953
Okanogan 07:40:29 -56.6 Dark Up 53.3 241.0 Up 07:25:29 - 07:55:29 6920
Brewster 07:40:29 -56.8 Dark Up 53.6 241.1 Up 07:25:29 - 07:55:29 6891
Manson/Chelan 07:40:29 -56.9 Dark Up 53.9 240.9 Up 07:25:29 - 07:55:29 6863
Victoria 07:40:41 -55.7 Dark Up 55.4 236.2 Up 07:25:41 - 07:55:41 6828
Wenatchee 07:40:28 -57.4 Dark Up 54.2 241.3 Up 07:25:28 - 07:55:28 6817
Ellensburg 07:40:28 -57.7 Dark Up 54.6 241.5 Up 07:25:28 - 07:55:28 6775
Yakima 07:40:25 -58.1 Dark Up 54.8 242.0 Up 07:25:25 - 07:55:25 6739
PNWRO 07:40:18 -59.0 Dark Up 54.0 244.6 Up 07:25:18 - 07:55:18 6737
Toppenish/White Swan 07:40:24 -58.3 Dark Up 54.8 242.5 Up 07:25:24 - 07:55:24 6725
Dunrhomin 07:39:15 -64.8 Dark Up 46.1 263.7 Up 07:24:15 - 07:54:15 6693
CU-SBO 07:39:14 -65.0 Dark Up 46.2 263.9 Up 07:24:14 - 07:54:14 6668
Goldendale 07:40:23 -58.8 Dark Up 55.3 242.7 Up 07:25:23 - 07:55:23 6665
The Dalles 07:40:24 -58.9 Dark Up 55.6 242.5 Up 07:25:24 - 07:55:24 6634
Maupin 07:40:22 -59.3 Dark Up 55.7 243.2 Up 07:25:22 - 07:55:22 6600
Sisters 07:40:21 -60.1 Dark Up 56.5 243.8 Up 07:25:21 - 07:55:21 6507
Bend 07:40:19 -60.3 Dark Up 56.4 244.4 Up 07:25:19 - 07:55:19 6493
Oregon Observatory 07:40:19 -60.5 Dark Up 56.6 244.5 Up 07:25:19 - 07:55:19 6474
North Lake 07:40:15 -61.2 Dark Up 56.5 245.9 Up 07:25:15 - 07:55:15 6433
Lakeview 07:40:10 -62.3 Dark Up 56.5 248.0 Up 07:25:10 - 07:55:10 6353
Chiloquin 07:40:17 -61.6 Dark Up 57.4 245.8 Up 07:25:17 - 07:55:17 6342
Klamath Falls 07:40:15 -61.9 Dark Up 57.5 246.4 Up 07:25:15 - 07:55:15 6313
Cedarville 07:40:08 -63.0 Dark Up 56.6 249.1 Up 07:25:08 - 07:55:08 6299
Fall River/Burney 07:40:10 -63.1 Dark Up 57.7 248.5 Up 07:25:10 - 07:55:10 6216
Susanville 07:40:05 -63.9 Dark Up 57.4 250.2 Up 07:25:05 - 07:55:05 6181
Gimple 07:40:07 -64.1 Dark Up 57.6 250.4 Up 07:25:07 - 07:55:07 6148
Greenville 07:40:05 -64.1 Dark Up 57.7 250.3 Up 07:25:05 - 07:55:05 6146
Portola 07:40:03 -64.5 Dark Up 57.5 251.3 Up 07:25:03 - 07:55:03 6131
Quincy 07:40:04 -64.3 Dark Up 57.8 250.6 Up 07:25:04 - 07:55:04 6127
Reno 07:40:00 -65.0 Dark Up 57.1 252.3 Up 07:25:00 - 07:55:00 6127
Yerington 07:39:56 -65.6 Dark Up 56.8 253.8 Up 07:24:56 - 07:54:56 6097
Carson City 07:39:59 -65.3 Dark Up 57.2 252.9 Up 07:24:59 - 07:54:59 6094
Tonopah 07:39:45 -67.0 Dark Up 55.6 256.9 Up 07:24:45 - 07:54:45 6075
Gardnerville 07:39:58 -65.5 Dark Up 57.2 253.3 Up 07:24:58 - 07:54:58 6073
Hawthorne 07:39:53 -66.2 Dark Up 56.5 254.9 Up 07:24:53 - 07:54:53 6071
Lee Vining 07:39:52 -66.6 Dark Up 57.0 255.3 Up 07:24:52 - 07:54:52 6002
Indian Springs 07:39:36 -68.7 Dark Up 54.7 260.2 Up 07:24:36 - 07:54:36 5990
Beatty 07:39:39 -68.2 Dark Up 55.5 258.9 Up 07:24:39 - 07:54:39 5983
Bishop 07:39:48 -67.4 Dark Up 56.6 256.8 Up 07:24:48 - 07:54:48 5970
Henderson 07:39:31 -69.3 Dark Up 54.2 261.4 Up 07:24:31 - 07:54:31 5964
Patrick 07:39:25 -70.0 Dark Up 53.4 263.1 Up 07:24:25 - 07:54:25 5946
Kingman/Dolan Springs 07:39:25 -70.2 Dark Up 53.6 263.3 Up 07:24:25 - 07:54:25 5918
Laughlin/Bullhead City 07:39:26 -70.2 Dark Up 54.0 262.9 Up 07:24:26 - 07:54:26 5897
Mohave Valley 07:39:26 -70.5 Dark Up 54.1 263.3 Up 07:24:26 - 07:54:26 5872
George/Scottsdale 07:39:12 -71.9 Dark Up 52.0 266.6 Up 07:24:12 - 07:54:12 5861
Lake Havasu City 07:39:25 -70.9 Dark Up 53.9 264.0 Up 07:24:25 - 07:54:25 5843
Parker 07:39:23 -71.3 Dark Up 53.9 264.5 Up 07:24:23 - 07:54:23 5811
Idyllwild 07:39:30 -71.2 Dark Up 55.9 263.5 Up 07:24:30 - 07:54:30 5685
Calipatria 07:39:25 -72.1 Dark Up 55.0 265.1 Up 07:24:25 - 07:54:25 5669
Yuma 07:39:19 -72.6 Dark Up 54.3 266.3 Up 07:24:19 - 07:54:19 5661
Wildwood 07:39:38 -70.4 Dark Up 57.4 261.6 Up 07:24:38 - 07:54:38 5652

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 456826, (2026/02/06 07:42UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 17.71  79
Alhena         06:37:42.8 +16:23:57  1.9  7.93  92
PPM 095944     06:25:33.0 +23:19:37  6.0  0.96  96
PPM 095980     06:27:00.1 +23:44:01  8.5  0.43  96
PPM 096015     06:27:58.9 +23:40:06  8.6  0.37  95
PPM 096043     06:28:56.2 +23:49:03 10.1  0.24  95
456826         06:28:24.2 +24:01:29 15.8        95
Positions are for J2000

Event circumstances last updated at 2022/04/13 23:10:15 UT

Marc W. Buie, Southwest Research Institute

RECON