RECON: TNO occultation with 06QG181

Event between 06QG181 and star GA1180:01603033 with event index number of 2013231

Geocentric closest approach at 2023/04/09 05:51:33 UTC

J2000 position of star is 05:35:06.5 +28:34:41
Equinox of date position of star is 05:36:33.9 +28:35:30
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 151 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=24.6

[RECON map]
Object is 35.1 AU from the Sun and 35.5 AU from the Earth.
Apparent velocity is 16.9 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 827 seconds.
The 1-sigma cross-track error in the shadow position is 5002 km.
The sky-plane scale is 25713.9 km/arcsec.

The object has an absolute magnitude Hv=9.0
Diameter=94.6 km assuming a 5% albedo -- 5.6 sec chord
Diameter=38.6 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 06QG181, (2023/04/09 05:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:15.5 +16:33:15  0.8 18.20 164
Alnath         05:27:45.9 +28:37:30  1.6  1.94 153
PPM 094619     05:40:47.2 +29:13:35  5.9  1.12 150
PPM 094505     05:36:07.1 +28:03:54  8.3  0.54 152
PPM 094491     05:35:30.9 +28:48:18 10.8  0.32 152
06QG181        05:36:34.9 +28:35:30 16.6       151
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 1.1 sigma about the mid-time.
The median site spacing is 17.0 km RECON observability=0.8 and success probability=1.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:54:56 -28.5 Dark Up 18.6 292.9 Really Low 05:39:56 - 06:09:56 11958
Kamloops 05:55:03 -25.6 Dark Down 26.7 283.4 Low 05:40:03 - 06:10:03 11402
Kelowna 05:55:07 -26.6 Dark Down 25.9 284.4 Low 05:40:07 - 06:10:07 11384
Peachland 05:55:08 -26.6 Dark Down 26.1 284.3 Low 05:40:08 - 06:10:08 11367
Summerland 05:55:10 -26.7 Dark Down 26.0 284.4 Low 05:40:10 - 06:10:10 11361
Penticton 05:55:10 -26.8 Dark Down 25.9 284.5 Low 05:40:10 - 06:10:10 11361
Oliver 05:55:12 -27.1 Dark Down 25.8 284.7 Low 05:40:12 - 06:10:12 11339
Anarchist Mountain Observatory 05:55:13 -27.3 Dark Down 25.6 284.9 Low 05:40:13 - 06:10:13 11336
Dunrhomin 05:55:52 -39.9 Dark Up 13.0 296.6 Really Low 05:40:52 - 06:10:52 11326
Nikitin 05:55:54 -40.0 Dark Up 12.9 296.7 Really Low 05:40:54 - 06:10:54 11314
CU-SBO 05:55:54 -40.1 Dark Up 12.9 296.6 Really Low 05:40:54 - 06:10:54 11307
Okanogan 05:55:16 -27.8 Dark Down 25.6 285.1 Low 05:40:16 - 06:10:16 11288
Brewster 05:55:17 -27.9 Dark Down 25.6 285.0 Low 05:40:17 - 06:10:17 11264
Manson/Chelan 05:55:18 -27.9 Dark Down 25.8 284.9 Low 05:40:18 - 06:10:18 11237
Wenatchee 05:55:20 -28.3 Dark Down 25.8 285.0 Low 05:40:20 - 06:10:20 11201
Ellensburg 05:55:23 -28.5 Dark Down 25.8 285.1 Low 05:40:23 - 06:10:23 11166
PNWRO 05:55:28 -30.0 Dark Up 24.5 286.6 Low 05:40:28 - 06:10:28 11163
Victoria 05:55:14 -26.1 Dark Down 28.1 282.4 Low 05:40:14 - 06:10:14 11160
Yakima 05:55:23 -28.8 Dark Down 25.7 285.3 Low 05:40:23 - 06:10:23 11139
Toppenish/White Swan 05:55:25 -29.1 Dark Down 25.6 285.5 Low 05:40:25 - 06:10:25 11131
The Dalles 05:55:29 -29.4 Dark Down 25.9 285.3 Low 05:40:29 - 06:10:29 11049
Maupin 05:55:30 -29.7 Dark Down 25.7 285.6 Low 05:40:30 - 06:10:30 11026
Sisters 05:55:35 -30.2 Dark Down 25.8 285.7 Low 05:40:35 - 06:10:35 10947
Bend 05:55:36 -30.5 Dark Down 25.5 286.0 Low 05:40:36 - 06:10:36 10941
Oregon Observatory 05:55:37 -30.6 Dark Down 25.6 286.0 Low 05:40:37 - 06:10:37 10924
Chiloquin 05:55:43 -31.4 Dark Up 25.5 286.4 Low 05:40:43 - 06:10:43 10815
Cedarville 05:55:50 -33.1 Dark Up 24.0 287.8 Low 05:40:50 - 06:10:50 10810
Klamath Falls 05:55:46 -31.8 Dark Up 25.3 286.6 Low 05:40:46 - 06:10:46 10794
Fall River/Burney 05:55:50 -32.9 Dark Up 24.7 287.3 Low 05:40:50 - 06:10:50 10725
Reno 05:55:58 -34.8 Dark Up 23.0 288.8 Low 05:40:58 - 06:10:58 10681
Gimple 05:55:55 -33.8 Dark Up 24.0 288.0 Low 05:40:55 - 06:10:55 10681
Greenville 05:55:55 -33.8 Dark Up 24.1 288.0 Low 05:40:55 - 06:10:55 10677
Portola 05:55:56 -34.3 Dark Up 23.6 288.4 Low 05:40:56 - 06:10:56 10674
Yerington 05:56:01 -35.6 Dark Up 22.4 289.4 Low 05:41:01 - 06:11:01 10668
Quincy 05:55:55 -33.9 Dark Up 24.0 288.1 Low 05:40:55 - 06:10:55 10663
Hawthorne 05:56:01 -36.2 Dark Up 21.8 289.9 Low 05:41:01 - 06:11:01 10657
Carson City 05:55:58 -35.1 Dark Up 22.9 289.0 Low 05:40:58 - 06:10:58 10656
Gardnerville 05:56:01 -35.3 Dark Up 22.8 289.1 Low 05:41:01 - 06:11:01 10640
Patrick 05:56:17 -41.0 Dark Up 17.1 293.3 Really Low 05:41:17 - 06:11:17 10631
Beatty 05:56:10 -38.4 Dark Up 19.8 291.4 Really Low 05:41:10 - 06:11:10 10616
Lee Vining 05:56:05 -36.4 Dark Up 22.0 289.8 Low 05:41:05 - 06:11:05 10594
George/Scottsdale 05:56:23 -43.3 Dark Up 14.9 294.7 Really Low 05:41:23 - 06:11:23 10593
Laughlin/Bullhead City 05:56:17 -40.8 Dark Up 17.5 293.0 Really Low 05:41:17 - 06:11:17 10582
Bishop 05:56:08 -37.2 Dark Up 21.2 290.4 Low 05:41:08 - 06:11:08 10581
Lake Havasu City 05:56:21 -41.5 Dark Up 17.1 293.3 Really Low 05:41:21 - 06:11:21 10543
Yuma 05:56:27 -42.8 Dark Up 16.6 293.7 Really Low 05:41:27 - 06:11:27 10391
Calipatria 05:56:26 -42.0 Dark Up 17.4 293.2 Really Low 05:41:26 - 06:11:26 10384
Idyllwild 05:56:23 -40.9 Dark Up 18.6 292.5 Really Low 05:41:23 - 06:11:23 10379
Wildwood 05:56:23 -39.7 Dark Up 20.2 291.5 Low 05:41:23 - 06:11:23 10322

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 06QG181, (2023/04/09 05:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 18.20 164
Alnath         05:26:17.6 +28:36:23  1.6  1.94 153
PPM 094619     05:39:18.3 +29:12:54  5.9  1.12 150
PPM 094505     05:34:39.1 +28:03:04  8.3  0.54 152
PPM 094491     05:34:02.4 +28:47:26 10.8  0.32 152
06QG181        05:35:06.5 +28:34:41 16.6       151
Positions are for J2000

Event circumstances last updated at 2023/01/07 03:19:49 UT

Marc W. Buie, Southwest Research Institute

RECON