RECON: TNO occultation with 523717

Event between (523717) 14KY101 and star GA0700:08413140 with event index number of 1098426

Geocentric closest approach at 2021/06/23 08:32:28 UTC

J2000 position of star is 17:11:06.1 -19:57:09
Equinox of date position of star is 17:12:20.9 -19:58:37
Stellar brightness G=13.2, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 7 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 35.4 AU from the Sun and 34.5 AU from the Earth.
The TNO is moving 23.4 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 196 seconds.
The 1-sigma cross-track error in the shadow position is 1682 km.
The sky-plane scale is 24992.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 13.5 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523717, (2021/06/23 08:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.7 -26:28:40  0.9 11.56   5
35Eta Oph      17:11:36.7 -15:45:00  2.6  4.23   9
PPM 266364     17:06:01.8 -20:31:23  6.5  1.58   5
PPM 266525     17:12:38.5 -20:26:59  7.9  0.48   7
PPM 266505     17:11:40.4 -20:04:33  9.5  0.19   7
523717         17:12:22.3 -19:58:39 13.2         7
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 4.6 sigma about the mid-time.
The median site spacing is 15.0 km RECON observability=0.8 and success probability=0.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 08:31:31 -16.0 AT Up 17.0 202.1 Really Low 08:16:31 - 08:46:31 6978
Kelowna 08:31:31 -16.4 AT Up 17.4 202.0 Really Low 08:16:31 - 08:46:31 6964
Peachland 08:31:31 -16.5 AT Up 17.6 201.8 Really Low 08:16:31 - 08:46:31 6962
Summerland 08:31:31 -16.7 AT Up 17.7 201.9 Really Low 08:16:31 - 08:46:31 6955
Penticton 08:31:30 -16.7 AT Up 17.8 202.0 Really Low 08:16:30 - 08:46:30 6952
Oliver 08:31:30 -17.1 AT Up 18.1 202.0 Really Low 08:16:30 - 08:46:30 6937
Victoria 08:31:40 -18.0 AT Up 19.6 198.4 Really Low 08:16:40 - 08:46:40 6934
Anarchist Mountain Observatory 08:31:29 -17.2 AT Up 18.2 202.2 Really Low 08:16:29 - 08:46:29 6930
Tonasket 08:31:29 -17.5 AT Up 18.5 202.2 Really Low 08:16:29 - 08:46:29 6917
Okanogan 08:31:29 -17.9 AT Up 18.8 202.1 Really Low 08:16:29 - 08:46:29 6904
Brewster 08:31:29 -18.2 Dark Up 19.1 201.9 Really Low 08:16:29 - 08:46:29 6894
Manson/Chelan 08:31:30 -18.4 Dark Up 19.4 201.6 Really Low 08:16:30 - 08:46:30 6887
Wenatchee 08:31:30 -18.9 Dark Up 19.9 201.5 Really Low 08:16:30 - 08:46:30 6868
Ellensburg 08:31:30 -19.3 Dark Up 20.4 201.3 Low 08:16:30 - 08:46:30 6852
Yakima 08:31:29 -19.7 Dark Up 20.7 201.4 Low 08:16:29 - 08:46:29 6833
Toppenish/White Swan 08:31:29 -19.9 Dark Up 20.9 201.6 Low 08:16:29 - 08:46:29 6822
Pasco 08:31:25 -19.9 Dark Up 20.7 202.8 Low 08:16:25 - 08:46:25 6807
Goldendale 08:31:29 -20.5 Dark Up 21.5 201.2 Low 08:16:29 - 08:46:29 6800
PNWRO 08:31:24 -20.2 Dark Up 20.8 203.1 Low 08:16:24 - 08:46:24 6794
The Dalles 08:31:30 -20.8 Dark Up 21.8 200.9 Low 08:16:30 - 08:46:30 6792
Maupin 08:31:29 -21.2 Dark Up 22.2 201.1 Low 08:16:29 - 08:46:29 6772
Sisters 08:31:30 -22.1 Dark Up 23.1 200.7 Low 08:16:30 - 08:46:30 6733
Redmond 08:31:28 -22.1 Dark Up 23.1 201.1 Low 08:16:28 - 08:46:28 6729
Bend 08:31:29 -22.3 Dark Up 23.3 201.0 Low 08:16:29 - 08:46:29 6720
Oregon Observatory 08:31:29 -22.5 Dark Up 23.5 200.9 Low 08:16:29 - 08:46:29 6712
La Pine/Gilchrist 08:31:30 -22.7 Dark Up 23.7 200.9 Low 08:16:30 - 08:46:30 6703
North Lake 08:31:26 -23.1 Dark Up 23.9 201.5 Low 08:16:26 - 08:46:26 6676
Paisley 08:31:25 -23.6 Dark Up 24.4 202.0 Low 08:16:25 - 08:46:25 6645
Klamath Falls 08:31:29 -24.2 Dark Up 25.1 200.8 Low 08:16:29 - 08:46:29 6630
Lakeview 08:31:23 -24.1 Dark Up 24.8 202.3 Low 08:16:23 - 08:46:23 6618
Cedarville 08:31:22 -24.7 Dark Up 25.3 202.5 Low 08:16:22 - 08:46:22 6581
Fall River/Burney 08:31:25 -25.3 Dark Up 26.1 201.4 Low 08:16:25 - 08:46:25 6564
Susanville 08:31:22 -25.9 Dark Up 26.5 202.3 Low 08:16:22 - 08:46:22 6524
Greenville 08:31:23 -26.2 Dark Up 26.8 202.0 Low 08:16:23 - 08:46:23 6511
Gimple 08:31:23 -26.2 Dark Up 26.8 202.1 Low 08:16:23 - 08:46:23 6510
Quincy 08:31:23 -26.4 Dark Up 27.0 202.1 Low 08:16:23 - 08:46:23 6499
Portola 08:31:21 -26.4 Dark Up 27.0 202.6 Low 08:16:21 - 08:46:21 6489
Reno 08:31:19 -26.7 Dark Up 27.1 203.3 Low 08:16:19 - 08:46:19 6468
Carson City 08:31:18 -27.0 Dark Up 27.4 203.4 Low 08:16:18 - 08:46:18 6448
Gardnerville 08:31:18 -27.2 Dark Up 27.6 203.4 Low 08:16:18 - 08:46:18 6433
Yerington 08:31:16 -27.1 Dark Up 27.4 204.0 Low 08:16:16 - 08:46:16 6431
Hawthorne 08:31:14 -27.5 Dark Up 27.6 204.6 Low 08:16:14 - 08:46:14 6399
Lee Vining 08:31:14 -28.1 Dark Up 28.3 204.3 Low 08:16:14 - 08:46:14 6370
Tonopah 08:31:09 -27.8 Dark Up 27.6 206.1 Low 08:16:09 - 08:46:09 6359
Dunrhomin 08:30:34 -23.1 Dark Up 20.9 216.7 Low 08:15:34 - 08:45:34 6340
Bishop 08:31:11 -28.6 Dark Up 28.6 205.1 Low 08:16:11 - 08:46:11 6327
Beatty 08:31:05 -28.9 Dark Up 28.5 206.8 Low 08:16:05 - 08:46:05 6283
Indian Springs 08:31:01 -29.0 Dark Up 28.4 208.0 Low 08:16:01 - 08:46:01 6252
CPSLO 08:31:17 -30.9 Dark Up 31.2 203.3 Up 08:16:17 - 08:46:17 6218
Henderson 08:30:58 -29.4 Dark Up 28.6 208.8 Low 08:15:58 - 08:45:58 6210
Patrick 08:30:53 -29.8 Dark Up 28.7 210.0 Low 08:15:53 - 08:45:53 6158
Laughlin/Bullhead City 08:30:56 -30.2 Dark Up 29.2 209.4 Low 08:15:56 - 08:45:56 6150
Kingman/Dolan Springs 08:30:53 -30.1 Dark Up 28.9 209.9 Low 08:15:53 - 08:45:53 6146
Mohave Valley 08:30:55 -30.5 Dark Up 29.4 209.5 Low 08:15:55 - 08:45:55 6132
Wildwood 08:31:08 -31.9 Dark Up 31.6 205.7 Up 08:16:08 - 08:46:08 6121
Lake Havasu City 08:30:54 -30.8 Dark Up 29.7 209.8 Low 08:15:54 - 08:45:54 6103
Idyllwild 08:31:02 -32.0 Dark Up 31.3 207.7 Up 08:16:02 - 08:46:02 6080
Parker 08:30:53 -31.1 Dark Up 29.9 209.9 Low 08:15:53 - 08:45:53 6079
Blythe 08:30:54 -31.7 Dark Up 30.5 209.8 Up 08:15:54 - 08:45:54 6048
Calipatria 08:30:56 -32.4 Dark Up 31.3 209.0 Up 08:15:56 - 08:45:56 6025
George/Scottsdale 08:30:44 -31.0 Dark Up 29.3 212.4 Low 08:15:44 - 08:45:44 6021
Yuma 08:30:52 -32.6 Dark Up 31.3 210.0 Up 08:15:52 - 08:45:52 5985

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 523717, (2021/06/23 08:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.56   5
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.23   9
PPM 266364     17:04:45.3 -20:29:41  6.5  1.58   5
PPM 266525     17:11:22.0 -20:25:29  7.9  0.48   7
PPM 266505     17:10:24.1 -20:03:02  9.5  0.19   7
523717         17:11:06.1 -19:57:09 13.2         7
Positions are for J2000

Event circumstances last updated at 2021/01/22 21:23:05 UT

Marc W. Buie, Southwest Research Institute

RECON