RECON: TNO occultation with 02CW224

Event between 02CW224 and star GA1180:02430539 with event index number of 1441740

Geocentric closest approach at 2026/01/24 09:28:53 UTC

J2000 position of star is 06:24:14.3 +29:07:42
Equinox of date position of star is 06:25:38.4 +29:06:54
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 84 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 33.1 AU from the Sun and 32.2 AU from the Earth.
The TNO is moving 21.2 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 367 seconds.
The 1-sigma cross-track error in the shadow position is 1215 km.
The sky-plane scale is 23383.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=224.9 km assuming a 5% albedo -- 10.6 sec chord
Diameter=91.8 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 02CW224, (2026/01/24 09:29UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.6 +27:57:40  1.1 17.81 102
Alnath         05:27:56.5 +28:37:38  1.6 12.69  71
PPM 095923     06:26:32.6 +29:41:27  6.5  0.60  84
PPM 095884     06:25:02.2 +28:44:25  8.4  0.42  84
PPM 095890     06:25:08.9 +28:58:21 10.2  0.22  84
02CW224        06:25:53.8 +29:06:45 15.7        84
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 2.5 sigma about the mid-time.
The median site spacing is 22.9 km RECON observability=1.0 and success probability=28.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:26:03 -48.4 Dark Down 38.7 269.2 Up 09:11:03 - 09:41:03 2795
Kamloops 09:26:26 -55.3 Dark Down 47.8 258.4 Up 09:11:26 - 09:41:26 2287
Kelowna 09:26:21 -55.7 Dark Down 47.4 260.0 Up 09:11:21 - 09:41:21 2235
Peachland 09:26:22 -55.9 Dark Down 47.6 259.9 Up 09:11:22 - 09:41:22 2217
Summerland 09:26:21 -56.0 Dark Down 47.5 260.1 Up 09:11:21 - 09:41:21 2206
Penticton 09:26:21 -56.0 Dark Down 47.5 260.3 Up 09:11:21 - 09:41:21 2203
Oliver 09:26:20 -56.3 Dark Down 47.5 260.7 Up 09:11:20 - 09:41:20 2170
Anarchist Mountain Observatory 09:26:18 -56.4 Dark Down 47.5 261.0 Up 09:11:18 - 09:41:18 2160
Tonasket 09:26:18 -56.7 Dark Down 47.5 261.3 Up 09:11:18 - 09:41:18 2129
Okanogan 09:26:17 -57.0 Dark Down 47.7 261.5 Up 09:11:17 - 09:41:17 2094
Brewster 09:26:17 -57.3 Dark Down 47.9 261.6 Up 09:11:17 - 09:41:17 2064
Manson/Chelan 09:26:17 -57.6 Dark Down 48.1 261.5 Up 09:11:17 - 09:41:17 2035
Victoria 09:26:27 -58.2 Dark Down 50.1 258.0 Up 09:11:27 - 09:41:27 2013
Wenatchee 09:26:16 -58.1 Dark Down 48.3 261.9 Up 09:11:16 - 09:41:16 1986
Ellensburg 09:26:16 -58.5 Dark Down 48.5 262.2 Up 09:11:16 - 09:41:16 1941
Yakima 09:26:14 -58.9 Dark Down 48.6 262.6 Up 09:11:14 - 09:41:14 1902
PNWRO 09:26:09 -58.7 Dark Down 47.5 264.6 Up 09:11:09 - 09:41:09 1892
Toppenish/White Swan 09:26:14 -59.0 Dark Down 48.5 263.0 Up 09:11:14 - 09:41:14 1886
Goldendale 09:26:13 -59.6 Dark Down 48.9 263.3 Up 09:11:13 - 09:41:13 1822
The Dalles 09:26:14 -59.9 Dark Down 49.2 263.3 Up 09:11:14 - 09:41:14 1791
Dunrhomin 09:25:24 -54.6 Dark Down 37.5 278.9 Up 09:10:24 - 09:40:24 1791
Maupin 09:26:12 -60.2 Dark Down 49.1 263.8 Up 09:11:12 - 09:41:12 1754
Sisters 09:26:11 -61.2 Dark Down 49.6 264.4 Up 09:11:11 - 09:41:11 1656
Bend 09:26:10 -61.2 Dark Down 49.4 264.9 Up 09:11:10 - 09:41:10 1640
Oregon Observatory 09:26:10 -61.4 Dark Down 49.5 265.0 Up 09:11:10 - 09:41:10 1619
North Lake 09:26:06 -61.7 Dark Down 49.2 266.2 Up 09:11:06 - 09:41:06 1572
Lakeview 09:26:03 -62.3 Dark Down 48.9 267.8 Up 09:11:03 - 09:41:03 1485
Chiloquin 09:26:08 -62.7 Dark Down 49.9 266.3 Up 09:11:08 - 09:41:08 1480
Klamath Falls 09:26:06 -62.9 Dark Down 49.9 266.7 Up 09:11:06 - 09:41:06 1448
Cedarville 09:26:00 -62.7 Dark Down 48.8 268.6 Up 09:11:00 - 09:41:00 1425
Fall River/Burney 09:26:02 -63.7 Dark Down 49.7 268.4 Up 09:11:02 - 09:41:02 1343
Susanville 09:25:59 -63.8 Dark Down 49.1 269.6 Up 09:10:59 - 09:40:59 1302
Gimple 09:25:59 -64.1 Dark Down 49.3 269.8 Up 09:10:59 - 09:40:59 1268
Greenville 09:25:59 -64.2 Dark Down 49.4 269.7 Up 09:10:59 - 09:40:59 1266
Portola 09:25:57 -64.2 Dark Down 49.0 270.4 Up 09:10:57 - 09:40:57 1247
Quincy 09:25:59 -64.3 Dark Down 49.4 270.0 Up 09:10:59 - 09:40:59 1246
Reno 09:25:55 -64.0 Dark Down 48.5 271.1 Up 09:10:55 - 09:40:55 1240
Carson City 09:25:54 -64.3 Dark Down 48.5 271.5 Up 09:10:54 - 09:40:54 1205
Yerington 09:25:52 -64.1 Dark Down 48.0 272.1 Up 09:10:52 - 09:40:52 1205
Gardnerville 09:25:53 -64.4 Dark Down 48.4 271.8 Up 09:10:53 - 09:40:53 1182
Hawthorne 09:25:50 -64.1 Dark Down 47.6 272.9 Up 09:10:50 - 09:40:50 1175
Tonopah 09:25:45 -63.6 Dark Down 46.4 274.2 Up 09:10:45 - 09:40:45 1173
Lee Vining 09:25:49 -64.8 Dark Down 47.9 273.3 Up 09:10:49 - 09:40:49 1104
Indian Springs 09:25:37 -63.5 Dark Down 45.1 276.5 Up 09:10:37 - 09:40:37 1076
Beatty 09:25:41 -64.0 Dark Down 46.0 275.7 Up 09:10:41 - 09:40:41 1073
Bishop 09:25:46 -64.8 Dark Down 47.3 274.3 Up 09:10:46 - 09:40:46 1067
Henderson 09:25:34 -63.4 Dark Down 44.5 277.4 Up 09:10:34 - 09:40:34 1046
Patrick 09:25:30 -63.0 Dark Down 43.5 278.5 Up 09:10:30 - 09:40:30 1023
Kingman/Dolan Springs 09:25:30 -63.2 Dark Down 43.6 278.7 Up 09:10:30 - 09:40:30 994
Laughlin/Bullhead City 09:25:31 -63.6 Dark Down 44.1 278.4 Up 09:10:31 - 09:40:31 974
Mohave Valley 09:25:30 -63.7 Dark Down 44.0 278.7 Up 09:10:30 - 09:40:30 947
George/Scottsdale 09:25:21 -62.3 Dark Down 41.6 280.9 Up 09:10:21 - 09:40:21 926
Lake Havasu City 09:25:29 -63.7 Dark Down 43.8 279.2 Up 09:10:29 - 09:40:29 916
Parker 09:25:28 -63.9 Dark Down 43.7 279.5 Up 09:10:28 - 09:40:28 882
Idyllwild 09:25:33 -65.8 Dark Down 45.6 278.9 Up 09:10:33 - 09:40:33 759
Calipatria 09:25:29 -65.3 Dark Down 44.5 280.0 Up 09:10:29 - 09:40:29 737
Wildwood 09:25:40 -66.9 Dark Down 47.2 277.7 Up 09:10:40 - 09:40:40 732
Yuma 09:25:26 -64.8 Dark Down 43.7 280.8 Up 09:10:26 - 09:40:26 725

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 02CW224, (2026/01/24 09:29UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 17.81 102
Alnath         05:26:17.6 +28:36:23  1.6 12.69  71
PPM 095923     06:24:52.7 +29:42:25  6.5  0.60  84
PPM 095884     06:23:23.0 +28:45:20  8.4  0.42  84
PPM 095890     06:23:29.6 +28:59:17 10.2  0.22  84
02CW224        06:24:14.3 +29:07:42 15.7        84
Positions are for J2000

Event circumstances last updated at 2022/01/10 00:12:10 UT

Marc W. Buie, Southwest Research Institute

RECON