RECON: TNO occultation with 612332

Event between (612332) 02CW224 and star GA1180:02552029 with event index number of 2812612

Geocentric closest approach at 2026/01/24 09:28:56 UTC

J2000 position of star is 06:24:14.3 +29:07:42
Equinox of date position of star is 06:25:39.6 +29:06:54
Stellar brightness G=15.6, 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 612332, (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 +28:37:37  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
612332         06:25:53.8 +29:06:45 15.6        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=27.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:26:07 -48.4 Dark Down 38.7 269.2 Up 09:11:07 - 09:41:07 2839
Kamloops 09:26:29 -55.3 Dark Down 47.8 258.4 Up 09:11:29 - 09:41:29 2331
Kelowna 09:26:24 -55.7 Dark Down 47.4 260.0 Up 09:11:24 - 09:41:24 2279
Peachland 09:26:25 -55.9 Dark Down 47.6 259.9 Up 09:11:25 - 09:41:25 2262
Summerland 09:26:24 -56.0 Dark Down 47.5 260.1 Up 09:11:24 - 09:41:24 2250
Penticton 09:26:24 -56.0 Dark Down 47.5 260.3 Up 09:11:24 - 09:41:24 2247
Oliver 09:26:23 -56.3 Dark Down 47.5 260.7 Up 09:11:23 - 09:41:23 2215
Anarchist Mountain Observatory 09:26:22 -56.4 Dark Down 47.4 261.0 Up 09:11:22 - 09:41:22 2204
Tonasket 09:26:21 -56.7 Dark Down 47.5 261.3 Up 09:11:21 - 09:41:21 2174
Okanogan 09:26:21 -57.0 Dark Down 47.7 261.5 Up 09:11:21 - 09:41:21 2138
Brewster 09:26:20 -57.3 Dark Down 47.9 261.6 Up 09:11:20 - 09:41:20 2108
Manson/Chelan 09:26:21 -57.6 Dark Down 48.1 261.6 Up 09:11:21 - 09:41:21 2079
Victoria 09:26:30 -58.2 Dark Down 50.1 258.0 Up 09:11:30 - 09:41:30 2057
Wenatchee 09:26:20 -58.1 Dark Down 48.3 261.9 Up 09:11:20 - 09:41:20 2030
Ellensburg 09:26:19 -58.5 Dark Down 48.5 262.2 Up 09:11:19 - 09:41:19 1985
Yakima 09:26:18 -58.8 Dark Down 48.6 262.7 Up 09:11:18 - 09:41:18 1947
PNWRO 09:26:13 -58.7 Dark Down 47.5 264.6 Up 09:11:13 - 09:41:13 1936
Toppenish/White Swan 09:26:17 -59.0 Dark Down 48.5 263.0 Up 09:11:17 - 09:41:17 1931
Goldendale 09:26:17 -59.6 Dark Down 48.9 263.3 Up 09:11:17 - 09:41:17 1867
Dunrhomin 09:25:27 -54.6 Dark Down 37.5 278.9 Up 09:10:27 - 09:40:27 1836
The Dalles 09:26:17 -59.9 Dark Down 49.1 263.3 Up 09:11:17 - 09:41:17 1835
CU-SBO 09:25:26 -54.8 Dark Down 37.5 279.0 Up 09:10:26 - 09:40:26 1809
Maupin 09:26:16 -60.2 Dark Down 49.1 263.8 Up 09:11:16 - 09:41:16 1798
Sisters 09:26:15 -61.1 Dark Down 49.6 264.5 Up 09:11:15 - 09:41:15 1700
Bend 09:26:13 -61.2 Dark Down 49.4 264.9 Up 09:11:13 - 09:41:13 1684
Oregon Observatory 09:26:13 -61.4 Dark Down 49.5 265.0 Up 09:11:13 - 09:41:13 1664
North Lake 09:26:10 -61.7 Dark Down 49.2 266.2 Up 09:11:10 - 09:41:10 1617
Lakeview 09:26:06 -62.3 Dark Down 48.8 267.8 Up 09:11:06 - 09:41:06 1529
Chiloquin 09:26:11 -62.7 Dark Down 49.9 266.3 Up 09:11:11 - 09:41:11 1524
Klamath Falls 09:26:10 -62.9 Dark Down 49.9 266.7 Up 09:11:10 - 09:41:10 1493
Cedarville 09:26:04 -62.7 Dark Down 48.7 268.6 Up 09:11:04 - 09:41:04 1470
Fall River/Burney 09:26:06 -63.7 Dark Down 49.7 268.4 Up 09:11:06 - 09:41:06 1387
Susanville 09:26:02 -63.8 Dark Down 49.1 269.6 Up 09:11:02 - 09:41:02 1346
Gimple 09:26:03 -64.1 Dark Down 49.3 269.8 Up 09:11:03 - 09:41:03 1313
Greenville 09:26:03 -64.2 Dark Down 49.4 269.7 Up 09:11:03 - 09:41:03 1310
Portola 09:26:01 -64.2 Dark Down 49.0 270.4 Up 09:11:01 - 09:41:01 1292
Quincy 09:26:02 -64.3 Dark Down 49.4 270.0 Up 09:11:02 - 09:41:02 1290
Reno 09:25:58 -64.0 Dark Down 48.5 271.1 Up 09:10:58 - 09:40:58 1285
Carson City 09:25:57 -64.3 Dark Down 48.5 271.5 Up 09:10:57 - 09:40:57 1250
Yerington 09:25:55 -64.1 Dark Down 48.0 272.1 Up 09:10:55 - 09:40:55 1250
Gardnerville 09:25:57 -64.4 Dark Down 48.4 271.8 Up 09:10:57 - 09:40:57 1227
Hawthorne 09:25:53 -64.1 Dark Down 47.6 272.9 Up 09:10:53 - 09:40:53 1220
Tonopah 09:25:48 -63.6 Dark Down 46.4 274.2 Up 09:10:48 - 09:40:48 1218
Lee Vining 09:25:53 -64.8 Dark Down 47.9 273.3 Up 09:10:53 - 09:40:53 1149
Indian Springs 09:25:41 -63.5 Dark Down 45.1 276.6 Up 09:10:41 - 09:40:41 1121
Beatty 09:25:44 -64.0 Dark Down 46.0 275.7 Up 09:10:44 - 09:40:44 1118
Bishop 09:25:49 -64.7 Dark Down 47.3 274.3 Up 09:10:49 - 09:40:49 1112
Henderson 09:25:37 -63.4 Dark Down 44.5 277.4 Up 09:10:37 - 09:40:37 1091
Patrick 09:25:33 -63.0 Dark Down 43.5 278.5 Up 09:10:33 - 09:40:33 1067
Kingman/Dolan Springs 09:25:33 -63.2 Dark Down 43.6 278.7 Up 09:10:33 - 09:40:33 1039
Laughlin/Bullhead City 09:25:35 -63.6 Dark Down 44.0 278.4 Up 09:10:35 - 09:40:35 1018
Mohave Valley 09:25:34 -63.7 Dark Down 44.0 278.7 Up 09:10:34 - 09:40:34 992
George/Scottsdale 09:25:25 -62.3 Dark Down 41.6 280.9 Up 09:10:25 - 09:40:25 971
Lake Havasu City 09:25:32 -63.7 Dark Down 43.7 279.2 Up 09:10:32 - 09:40:32 960
Parker 09:25:31 -63.9 Dark Down 43.7 279.5 Up 09:10:31 - 09:40:31 927
Idyllwild 09:25:37 -65.8 Dark Down 45.6 278.9 Up 09:10:37 - 09:40:37 803
Calipatria 09:25:33 -65.3 Dark Down 44.5 280.0 Up 09:10:33 - 09:40:33 782
Wildwood 09:25:43 -66.9 Dark Down 47.1 277.7 Up 09:10:43 - 09:40:43 777
Yuma 09:25:29 -64.8 Dark Down 43.7 280.8 Up 09:10:29 - 09:40:29 770

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 612332, (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
612332         06:24:14.3 +29:07:42 15.6        84
Positions are for J2000

Event circumstances last updated at 2022/05/04 23:20:37 UT

Marc W. Buie, Southwest Research Institute

RECON