RECON: TNO occultation with 523761

Event between (523761) 14WU509 and star GA0920:01008194 with event index number of 2613902

Geocentric closest approach at 2021/12/06 12:11:25 UTC

J2000 position of star is 06:01:06.3 +03:52:28
Equinox of date position of star is 06:02:15.8 +03:52:25
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 152 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 40.6 AU from the Sun and 39.7 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is 1531 km.
The sky-plane scale is 28775.6 km/arcsec.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 16.2 sec chord
Diameter=162.5 km assuming a 30% albedo -- 6.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523761, (2021/12/06 12:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.6 +07:24:34  0.4  3.83 154
34Del Ori      05:33:07.7 -00:17:04  2.2  8.38 145
66 Ori         06:06:07.9 +04:09:20  5.6  1.01 153
PPM 149826     06:04:35.6 +03:51:35  8.0  0.58 153
PPM 149747     06:01:24.0 +03:27:39  9.6  0.47 152
PPM 149762     06:01:52.2 +04:05:11 11.7  0.23 153
523761         06:02:15.8 +03:52:25 16.3       153
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 23.1 km RECON observability=1.0 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:08:42 -24.6 Dark Down 20.2 249.1 Low 11:58:53 - 12:18:32 8146
Kamloops 12:09:03 -33.5 Dark Down 28.8 236.6 Low 11:59:13 - 12:18:52 8048
Kelowna 12:08:59 -33.0 Dark Down 28.8 237.8 Low 11:59:10 - 12:18:49 7980
Peachland 12:09:00 -33.2 Dark Down 29.0 237.6 Low 11:59:10 - 12:18:49 7971
Summerland 12:08:59 -33.1 Dark Down 29.1 237.7 Low 11:59:09 - 12:18:48 7959
Penticton 12:08:59 -33.1 Dark Down 29.0 237.9 Low 11:59:09 - 12:18:48 7953
Oliver 12:08:59 -33.1 Dark Down 29.2 238.0 Low 11:59:09 - 12:18:48 7924
Anarchist Mountain Observatory 12:08:57 -33.0 Dark Down 29.2 238.3 Low 11:59:08 - 12:18:47 7909
Tonasket 12:08:57 -33.0 Dark Down 29.4 238.4 Low 11:59:08 - 12:18:47 7883
Victoria 12:09:04 -35.7 Dark Down 31.7 234.7 Up 11:59:15 - 12:18:54 7878
Okanogan 12:08:57 -33.2 Dark Down 29.7 238.4 Low 11:59:07 - 12:18:46 7855
Brewster 12:08:57 -33.3 Dark Down 29.9 238.3 Low 11:59:07 - 12:18:46 7833
Manson/Chelan 12:08:57 -33.6 Dark Down 30.3 238.1 Up 11:59:07 - 12:18:46 7816
Wenatchee 12:08:56 -33.7 Dark Down 30.6 238.2 Up 11:59:07 - 12:18:46 7776
Ellensburg 12:08:56 -33.9 Dark Down 30.9 238.2 Up 11:59:06 - 12:18:45 7741
Yakima 12:08:55 -33.9 Dark Down 31.2 238.4 Up 11:59:05 - 12:18:44 7706
Toppenish/White Swan 12:08:54 -33.8 Dark Down 31.2 238.6 Up 11:59:04 - 12:18:43 7687
Pasco 12:08:52 -32.9 Dark Down 30.5 239.9 Up 11:59:02 - 12:18:41 7673
PNWRO 12:08:50 -32.8 Dark Down 30.5 240.2 Up 11:59:01 - 12:18:40 7651
Goldendale 12:08:54 -34.1 Dark Down 31.7 238.5 Up 11:59:05 - 12:18:44 7640
The Dalles 12:08:55 -34.4 Dark Down 32.1 238.3 Up 11:59:05 - 12:18:44 7621
Maupin 12:08:54 -34.3 Dark Down 32.2 238.6 Up 11:59:04 - 12:18:43 7584
Sisters 12:08:53 -34.7 Dark Down 33.0 238.6 Up 11:59:04 - 12:18:43 7508
Redmond 12:08:52 -34.4 Dark Down 32.8 239.0 Up 11:59:02 - 12:18:41 7505
Bend 12:08:52 -34.5 Dark Down 33.0 239.0 Up 11:59:02 - 12:18:41 7486
Oregon Observatory 12:08:52 -34.6 Dark Down 33.1 239.0 Up 11:59:02 - 12:18:41 7471
La Pine/Gilchrist 12:08:52 -34.7 Dark Down 33.3 239.0 Up 11:59:03 - 12:18:42 7453
North Lake 12:08:50 -34.2 Dark Down 33.1 239.8 Up 11:59:00 - 12:18:39 7412
Paisley 12:08:48 -34.0 Dark Down 33.2 240.5 Up 11:58:58 - 12:18:37 7361
Chiloquin 12:08:51 -34.9 Dark Down 34.1 239.3 Up 11:59:01 - 12:18:40 7353
Klamath Falls 12:08:49 -34.9 Dark Down 34.2 239.6 Up 11:59:00 - 12:18:39 7322
Lakeview 12:08:47 -33.8 Dark Down 33.3 240.9 Up 11:58:57 - 12:18:36 7314
Cedarville 12:08:45 -33.7 Dark Down 33.5 241.5 Up 11:58:55 - 12:18:34 7254
Fall River/Burney 12:08:47 -34.6 Dark Down 34.5 240.6 Up 11:58:57 - 12:18:36 7212
Susanville 12:08:44 -34.0 Dark Down 34.3 241.7 Up 11:58:55 - 12:18:34 7151
Greenville 12:08:45 -34.2 Dark Down 34.7 241.6 Up 11:58:55 - 12:18:34 7127
Gimple 12:08:44 -34.2 Dark Down 34.6 241.7 Up 11:58:55 - 12:18:34 7126
Dunrhomin 12:08:13 -22.4 Dark Down 23.6 254.2 Low 11:58:23 - 12:18:02 7115
Quincy 12:08:44 -34.2 Dark Down 34.8 241.7 Up 11:58:54 - 12:18:33 7107
Portola 12:08:42 -33.9 Dark Down 34.5 242.2 Up 11:58:53 - 12:18:32 7094
Reno 12:08:41 -33.4 Dark Down 34.2 242.9 Up 11:58:52 - 12:18:31 7068
Carson City 12:08:40 -33.3 Dark Down 34.3 243.2 Up 11:58:51 - 12:18:30 7034
Yerington 12:08:38 -32.8 Dark Down 34.0 243.8 Up 11:58:48 - 12:18:27 7013
Gardnerville 12:08:39 -33.3 Dark Down 34.4 243.4 Up 11:58:50 - 12:18:29 7010
Hawthorne 12:08:37 -32.4 Dark Down 33.8 244.6 Up 11:58:47 - 12:18:26 6968
Tonopah 12:08:32 -31.3 Dark Down 33.0 246.0 Up 11:58:42 - 12:18:21 6920
Lee Vining 12:08:36 -32.7 Dark Down 34.4 244.5 Up 11:58:47 - 12:18:26 6915
Bishop 12:08:34 -32.1 Dark Down 34.2 245.5 Up 11:58:45 - 12:18:24 6856
Beatty 12:08:30 -30.8 Dark Down 33.2 247.1 Up 11:58:40 - 12:18:19 6807
Indian Springs 12:08:26 -29.9 Dark Down 32.5 248.1 Up 11:58:36 - 12:18:15 6773
Henderson 12:08:24 -29.3 Dark Down 32.2 249.0 Up 11:58:34 - 12:18:13 6719
CPSLO 12:08:37 -33.7 Dark Down 36.7 244.9 Up 11:58:47 - 12:18:26 6661
Patrick 12:08:21 -28.3 Dark Down 31.6 250.2 Up 11:58:31 - 12:18:10 6656
Kingman/Dolan Springs 12:08:21 -28.4 Dark Down 31.8 250.1 Up 11:58:31 - 12:18:10 6634
Laughlin/Bullhead City 12:08:22 -28.8 Dark Down 32.2 249.8 Up 11:58:32 - 12:18:11 6633
Mohave Valley 12:08:21 -28.8 Dark Down 32.3 249.9 Up 11:58:32 - 12:18:11 6606
Lake Havasu City 12:08:20 -28.5 Dark Down 32.2 250.4 Up 11:58:31 - 12:18:10 6566
Wildwood 12:08:29 -31.9 Dark Down 35.6 247.4 Up 11:58:40 - 12:18:19 6536
Parker 12:08:19 -28.4 Dark Down 32.3 250.6 Up 11:58:30 - 12:18:09 6531
Idyllwild 12:08:24 -30.4 Dark Down 34.3 249.0 Up 11:58:34 - 12:18:13 6496
George/Scottsdale 12:08:13 -26.4 Dark Down 30.6 252.6 Up 11:58:24 - 12:18:03 6485
Blythe 12:08:19 -28.6 Dark Down 32.7 250.7 Up 11:58:29 - 12:18:08 6479
Calipatria 12:08:21 -29.3 Dark Down 33.6 250.3 Up 11:58:32 - 12:18:11 6431
Yuma 12:08:18 -28.5 Dark Down 33.1 251.2 Up 11:58:29 - 12:18:08 6386

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 523761, (2021/12/06 12:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  3.83 154
34Del Ori      05:32:00.4 -00:17:57  2.2  8.38 145
66 Ori         06:04:58.3 +04:09:31  5.6  1.01 153
PPM 149826     06:03:26.2 +03:51:43  8.0  0.58 153
PPM 149747     06:00:14.8 +03:27:40  9.6  0.47 152
PPM 149762     06:00:42.6 +04:05:13 11.7  0.23 153
523761         06:01:06.3 +03:52:28 16.3       152
Positions are for J2000

Event circumstances last updated at 2021/12/06 01:43:49 UT

Marc W. Buie, Southwest Research Institute

RECON