RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star GA0940:02873561 with event index number of 1164986

Geocentric closest approach at 2022/01/31 03:44:18 UTC

J2000 position of star is 07:38:35.0 +04:44:07
Equinox of date position of star is 07:39:42.0 +04:41:09
Stellar brightness G=13.1, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.2

[RECON map]
TNO is 14.4 AU from the Sun and 13.5 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
The 1-sigma error in the time of the event is 73 seconds.
The 1-sigma cross-track error in the shadow position is 886 km.
The sky-plane scale is 9809.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 3.2 sec chord
Diameter=29.6 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 250112, (2022/01/31 03:44UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:39.9 +27:58:16  1.1 23.35 176
Alhena         06:38:59.2 +16:22:43  1.9 18.95 160
PPM 152982     07:37:45.2 +05:48:42  6.2  1.23 160
PPM 153032     07:39:27.9 +04:53:29  7.7  0.22 159
PPM 153043     07:39:49.4 +04:35:45  8.8  0.09 159
250112         07:39:45.1 +04:41:01 13.1       159
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 24.1 km RECON observability=1.0 and success probability=30.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 03:47:11 -28.7 Dark Down 30.0 123.0 Low 03:40:38 - 03:53:45 2128
Kelowna 03:47:12 -28.6 Dark Down 30.1 122.7 Up 03:40:39 - 03:53:46 2093
Peachland 03:47:13 -28.4 Dark Down 30.0 122.3 Up 03:40:40 - 03:53:47 2081
Summerland 03:47:13 -28.5 Dark Down 30.1 122.3 Up 03:40:39 - 03:53:46 2069
Penticton 03:47:13 -28.6 Dark Down 30.2 122.4 Up 03:40:40 - 03:53:47 2063
Oliver 03:47:14 -28.6 Dark Down 30.4 122.2 Up 03:40:40 - 03:53:47 2032
Anarchist Mountain Observatory 03:47:14 -28.8 Dark Down 30.6 122.3 Up 03:40:40 - 03:53:47 2019
Tonasket 03:47:14 -28.8 Dark Down 30.8 122.1 Up 03:40:41 - 03:53:48 1991
Okanogan 03:47:15 -28.7 Dark Down 30.8 121.8 Up 03:40:42 - 03:53:49 1960
Victoria 03:47:23 -26.2 Dark Down 28.6 118.3 Low 03:40:50 - 03:53:57 1952
Brewster 03:47:17 -28.6 Dark Down 30.9 121.5 Up 03:40:43 - 03:53:50 1934
Manson/Chelan 03:47:18 -28.4 Dark Down 30.8 121.0 Up 03:40:44 - 03:53:51 1913
Wenatchee 03:47:19 -28.3 Dark Down 30.9 120.6 Up 03:40:45 - 03:53:52 1870
Ellensburg 03:47:20 -28.2 Dark Down 31.0 120.2 Up 03:40:47 - 03:53:54 1831
Yakima 03:47:21 -28.2 Dark Down 31.2 120.0 Up 03:40:48 - 03:53:55 1794
Toppenish/White Swan 03:47:21 -28.4 Dark Down 31.4 120.0 Up 03:40:48 - 03:53:55 1775
Pasco 03:47:18 -29.2 Dark Down 32.2 121.2 Up 03:40:45 - 03:53:52 1772
PNWRO 03:47:18 -29.4 Dark Down 32.5 121.2 Up 03:40:45 - 03:53:52 1751
Goldendale 03:47:23 -28.1 Dark Down 31.4 119.4 Up 03:40:50 - 03:53:57 1722
The Dalles 03:47:24 -27.9 Dark Down 31.3 118.9 Up 03:40:51 - 03:53:58 1699
Maupin 03:47:25 -28.0 Dark Down 31.6 118.8 Up 03:40:51 - 03:53:58 1661
Redmond 03:47:27 -27.9 Dark Down 32.0 118.2 Up 03:40:53 - 03:54:00 1576
Sisters 03:47:28 -27.7 Dark Down 31.7 117.9 Up 03:40:54 - 03:54:01 1576
Bend 03:47:27 -27.9 Dark Down 32.0 118.0 Up 03:40:54 - 03:54:01 1555
Oregon Observatory 03:47:28 -27.8 Dark Down 32.0 117.7 Up 03:40:55 - 03:54:02 1538
La Pine/Gilchrist 03:47:29 -27.7 Dark Down 32.0 117.6 Up 03:40:55 - 03:54:02 1518
North Lake 03:47:28 -28.2 Dark Down 32.6 117.9 Up 03:40:54 - 03:54:01 1481
Paisley 03:47:28 -28.5 Dark Down 33.1 117.9 Up 03:40:54 - 03:54:01 1431
Chiloquin 03:47:31 -27.5 Dark Down 32.3 116.7 Up 03:40:58 - 03:54:05 1411
Lakeview 03:47:28 -28.6 Dark Down 33.5 117.8 Up 03:40:54 - 03:54:01 1384
Klamath Falls 03:47:32 -27.6 Dark Down 32.5 116.5 Up 03:40:58 - 03:54:05 1378
Dunrhomin 03:46:49 -40.1 Dark Down 43.9 131.6 Up 03:40:15 - 03:53:22 1332
Cedarville 03:47:29 -28.8 Dark Down 33.9 117.5 Up 03:40:55 - 03:54:02 1322
Fall River/Burney 03:47:33 -27.9 Dark Down 33.3 116.2 Up 03:40:59 - 03:54:06 1267
Susanville 03:47:32 -28.5 Dark Down 34.1 116.5 Up 03:40:58 - 03:54:05 1211
Gimple 03:47:33 -28.3 Dark Down 34.1 116.1 Up 03:40:59 - 03:54:06 1182
Greenville 03:47:33 -28.2 Dark Down 34.0 116.0 Up 03:40:59 - 03:54:06 1182
Quincy 03:47:33 -28.2 Dark Down 34.1 115.9 Up 03:41:00 - 03:54:07 1162
Portola 03:47:32 -28.6 Dark Down 34.5 116.3 Up 03:40:59 - 03:54:06 1153
Reno 03:47:31 -29.1 Dark Down 35.1 116.7 Up 03:40:57 - 03:54:04 1131
Carson City 03:47:31 -29.1 Dark Down 35.2 116.4 Up 03:40:58 - 03:54:05 1096
Yerington 03:47:30 -29.6 Dark Down 35.8 116.9 Up 03:40:57 - 03:54:04 1081
Gardnerville 03:47:31 -29.2 Dark Down 35.4 116.3 Up 03:40:58 - 03:54:05 1072
Hawthorne 03:47:29 -30.0 Dark Down 36.3 117.0 Up 03:40:56 - 03:54:03 1039
Tonopah 03:47:26 -31.2 Dark Down 37.5 118.0 Up 03:40:53 - 03:54:00 1004
Lee Vining 03:47:31 -29.7 Dark Down 36.3 116.2 Up 03:40:58 - 03:54:05 980
Bishop 03:47:30 -30.3 Dark Down 37.0 116.5 Up 03:40:57 - 03:54:04 926
Beatty 03:47:26 -31.6 Dark Down 38.4 117.6 Up 03:40:53 - 03:54:00 892
Indian Springs 03:47:24 -32.4 Dark Down 39.3 118.3 Up 03:40:50 - 03:53:57 869
Henderson 03:47:22 -33.0 Dark Down 40.0 118.6 Up 03:40:49 - 03:53:56 821
Patrick 03:47:19 -33.9 Dark Down 41.1 119.1 Up 03:40:46 - 03:53:53 768
Kingman/Dolan Springs 03:47:20 -33.8 Dark Down 41.1 118.8 Up 03:40:47 - 03:53:54 744
Laughlin/Bullhead City 03:47:22 -33.3 Dark Down 40.7 118.3 Up 03:40:48 - 03:53:55 736
Mohave Valley 03:47:22 -33.4 Dark Down 40.9 118.1 Up 03:40:49 - 03:53:56 709
CPSLO 03:47:38 -28.4 Dark Down 36.3 113.2 Up 03:41:05 - 03:54:12 701
Lake Havasu City 03:47:22 -33.6 Dark Down 41.3 118.0 Up 03:40:48 - 03:53:55 670
Parker 03:47:22 -33.6 Dark Down 41.4 117.7 Up 03:40:48 - 03:53:55 635
George/Scottsdale 03:47:15 -35.6 Dark Down 43.4 119.6 Up 03:40:41 - 03:53:48 615
Wildwood 03:47:34 -30.1 Dark Down 38.3 114.0 Up 03:41:01 - 03:54:08 593
Blythe 03:47:23 -33.4 Dark Down 41.5 117.1 Up 03:40:50 - 03:53:57 579
Idyllwild 03:47:30 -31.6 Dark Down 39.8 115.3 Up 03:40:56 - 03:54:03 572
Calipatria 03:47:26 -32.6 Dark Down 41.0 115.9 Up 03:40:53 - 03:54:00 520
Yuma 03:47:24 -33.3 Dark Down 41.9 116.3 Up 03:40:51 - 03:53:58 483

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 250112, (2022/01/31 03:44UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 23.35 176
Alhena         06:37:42.8 +16:23:57  1.9 18.95 160
PPM 152982     07:36:34.5 +05:51:44  6.2  1.23 160
PPM 153032     07:38:17.7 +04:56:34  7.7  0.22 159
PPM 153043     07:38:39.3 +04:38:51  8.8  0.09 159
250112         07:38:35.0 +04:44:07 13.1       159
Positions are for J2000

Event circumstances last updated at 2021/02/08 20:45:03 UT

Marc W. Buie, Southwest Research Institute

RECON