RECON: TNO occultation with 612332

Event between (612332) 02CW224 and star GA1180:02683136 with event index number of 2812714

Geocentric closest approach at 2027/01/21 09:36:25 UTC

J2000 position of star is 06:34:01.2 +29:00:33
Equinox of date position of star is 06:35:26.3 +28:59:26
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 8 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 32.9 AU from the Sun and 32.0 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 413 seconds.
The 1-sigma cross-track error in the shadow position is 1360 km.
The sky-plane scale is 23198.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=224.9 km assuming a 5% albedo -- 10.1 sec chord
Diameter=91.8 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 612332, (2027/01/21 09:36UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:58.3 +27:57:31  1.1 15.67   9
Alhena         06:39:16.5 +16:22:26  1.9 12.64  12
53 Aur         06:40:05.9 +28:57:30  5.5  0.95   7
PPM 096107     06:33:25.2 +28:21:39  8.3  0.81   9
PPM 096171     06:35:38.2 +28:50:33  9.0  0.15   8
612332         06:35:44.2 +28:59:11 16.0         8
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 2.2 sigma about the mid-time.
The median site spacing is 23.0 km RECON observability=1.0 and success probability=38.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:33:55 -48.0 Dark Up 40.9 266.1 Up 09:18:55 - 09:48:55 1683
Kamloops 09:34:18 -55.3 Dark Up 49.9 254.8 Up 09:19:18 - 09:49:18 1177
Kelowna 09:34:14 -55.6 Dark Up 49.6 256.5 Up 09:19:14 - 09:49:14 1125
Peachland 09:34:14 -55.8 Dark Up 49.8 256.4 Up 09:19:14 - 09:49:14 1108
Summerland 09:34:14 -55.9 Dark Up 49.8 256.6 Up 09:19:14 - 09:49:14 1096
Penticton 09:34:13 -55.9 Dark Up 49.7 256.8 Up 09:19:13 - 09:49:13 1093
Oliver 09:34:12 -56.2 Dark Up 49.8 257.2 Up 09:19:12 - 09:49:12 1061
Anarchist Mountain Observatory 09:34:11 -56.2 Dark Up 49.7 257.6 Up 09:19:11 - 09:49:11 1050
Tonasket 09:34:11 -56.5 Dark Up 49.8 257.9 Up 09:19:11 - 09:49:11 1020
Okanogan 09:34:10 -56.8 Dark Up 50.0 258.1 Up 09:19:10 - 09:49:10 985
Brewster 09:34:10 -57.1 Dark Up 50.2 258.3 Up 09:19:10 - 09:49:10 954
Manson/Chelan 09:34:10 -57.4 Dark Up 50.5 258.2 Up 09:19:10 - 09:49:10 925
Victoria 09:34:20 -58.2 Dark Up 52.4 254.4 Up 09:19:20 - 09:49:20 904
Wenatchee 09:34:09 -57.9 Dark Up 50.7 258.6 Up 09:19:09 - 09:49:09 876
Ellensburg 09:34:09 -58.3 Dark Up 50.9 258.9 Up 09:19:09 - 09:49:09 832
Yakima 09:34:08 -58.6 Dark Up 51.0 259.4 Up 09:19:08 - 09:49:08 793
PNWRO 09:34:02 -58.4 Dark Up 50.0 261.5 Up 09:19:02 - 09:49:02 782
Toppenish/White Swan 09:34:07 -58.7 Dark Up 50.9 259.8 Up 09:19:07 - 09:49:07 777
Goldendale 09:34:07 -59.4 Dark Up 51.3 260.1 Up 09:19:07 - 09:49:07 713
The Dalles 09:34:07 -59.7 Dark Up 51.6 260.0 Up 09:19:07 - 09:49:07 682
Dunrhomin 09:33:17 -53.6 Dark Up 40.2 276.7 Up 09:18:17 - 09:48:17 680
CU-SBO 09:33:17 -53.8 Dark Up 40.2 276.9 Up 09:18:17 - 09:48:17 653
Maupin 09:34:06 -60.0 Dark Up 51.6 260.7 Up 09:19:06 - 09:49:06 645
Sisters 09:34:05 -60.9 Dark Up 52.1 261.3 Up 09:19:05 - 09:49:05 547
Bend 09:34:03 -60.9 Dark Up 52.0 261.9 Up 09:19:03 - 09:49:03 531
Oregon Observatory 09:34:03 -61.1 Dark Up 52.1 262.0 Up 09:19:03 - 09:49:03 511
North Lake 09:34:00 -61.4 Dark Up 51.8 263.2 Up 09:19:00 - 09:49:00 463
Lakeview 09:33:57 -61.9 Dark Up 51.5 265.0 Up 09:18:57 - 09:48:57 376
Chiloquin 09:34:01 -62.3 Dark Up 52.6 263.3 Up 09:19:01 - 09:49:01 371
Klamath Falls 09:34:00 -62.6 Dark Up 52.5 263.8 Up 09:19:00 - 09:49:00 339
Cedarville 09:33:55 -62.3 Dark Up 51.4 265.9 Up 09:18:55 - 09:48:55 316
Fall River/Burney 09:33:57 -63.2 Dark Up 52.4 265.6 Up 09:18:57 - 09:48:57 234
Susanville 09:33:53 -63.3 Dark Up 51.9 267.0 Up 09:18:53 - 09:48:53 193
Gimple 09:33:53 -63.6 Dark Up 52.0 267.2 Up 09:18:53 - 09:48:53 159
Greenville 09:33:54 -63.7 Dark Up 52.1 267.1 Up 09:18:54 - 09:48:54 157
Portola 09:33:51 -63.6 Dark Up 51.8 267.8 Up 09:18:51 - 09:48:51 139
Quincy 09:33:53 -63.8 Dark Up 52.1 267.4 Up 09:18:53 - 09:48:53 137
Reno 09:33:49 -63.4 Dark Up 51.3 268.6 Up 09:18:49 - 09:48:49 131
Carson City 09:33:48 -63.7 Dark Up 51.3 269.1 Up 09:18:48 - 09:48:48 96
Yerington 09:33:46 -63.4 Dark Up 50.8 269.7 Up 09:18:46 - 09:48:46 96
Gardnerville 09:33:48 -63.8 Dark Up 51.2 269.4 Up 09:18:48 - 09:48:48 74
Hawthorne 09:33:44 -63.4 Dark Up 50.4 270.6 Up 09:18:44 - 09:48:44 66
Tonopah 09:33:39 -62.8 Dark Up 49.3 272.0 Up 09:18:39 - 09:48:39 64
Lee Vining 09:33:44 -64.0 Dark Up 50.7 271.0 Up 09:18:44 - 09:48:44 -5
Indian Springs 09:33:32 -62.6 Dark Up 48.0 274.5 Up 09:18:32 - 09:48:32 -33
Beatty 09:33:35 -63.2 Dark Up 48.9 273.6 Up 09:18:35 - 09:48:35 -36
Bishop 09:33:41 -64.0 Dark Up 50.2 272.1 Up 09:18:41 - 09:48:41 -42
Henderson 09:33:29 -62.4 Dark Up 47.4 275.4 Up 09:18:29 - 09:48:29 -63
Patrick 09:33:24 -61.9 Dark Up 46.4 276.7 Up 09:18:24 - 09:48:24 -87
Kingman/Dolan Springs 09:33:24 -62.1 Dark Up 46.6 276.8 Up 09:18:24 - 09:48:24 -115
Laughlin/Bullhead City 09:33:26 -62.5 Dark Up 47.0 276.6 Up 09:18:26 - 09:48:26 -136
Mohave Valley 09:33:25 -62.6 Dark Up 46.9 276.9 Up 09:18:25 - 09:48:25 -162
George/Scottsdale 09:33:16 -61.1 Dark Up 44.6 279.3 Up 09:18:16 - 09:48:16 -184
Lake Havasu City 09:33:24 -62.6 Dark Up 46.7 277.4 Up 09:18:24 - 09:48:24 -194
Parker 09:33:23 -62.8 Dark Up 46.6 277.8 Up 09:18:23 - 09:48:23 -228
Idyllwild 09:33:28 -64.7 Dark Up 48.5 277.2 Up 09:18:28 - 09:48:28 -351
Calipatria 09:33:24 -64.1 Dark Up 47.5 278.3 Up 09:18:24 - 09:48:24 -372
Wildwood 09:33:34 -65.9 Dark Up 50.1 275.9 Up 09:18:34 - 09:48:34 -377
Yuma 09:33:21 -63.6 Dark Up 46.7 279.2 Up 09:18:21 - 09:48:21 -384

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, (2027/01/21 09:36UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 15.67   9
Alhena         06:37:42.8 +16:23:56  1.9 12.64  12
53 Aur         06:38:23.0 +28:59:03  5.5  0.95   7
PPM 096107     06:31:42.7 +28:22:56  8.3  0.81   9
PPM 096171     06:33:55.3 +28:51:55  9.0  0.15   8
612332         06:34:01.2 +29:00:33 16.0         8
Positions are for J2000

Event circumstances last updated at 2022/05/05 23:18:00 UT

Marc W. Buie, Southwest Research Institute

RECON