RECON: TNO occultation with 523955

Event between (523955) 98UU43 and star GA1080:00838596 with event index number of 2352361

Geocentric closest approach at 2022/10/20 09:53:00 UTC

J2000 position of star is 05:08:27.9 +18:42:35
Equinox of date position of star is 05:09:46.0 +18:44:13
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 69 degrees from the moon. Moon is 25% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 34.6 AU from the Sun and 33.9 AU from the Earth.
The TNO is moving 14.2 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 683 seconds.
The 1-sigma cross-track error in the shadow position is 4158 km.
The sky-plane scale is 24620.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 14.0 sec chord
Diameter=81.5 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is 4:3E
 
 
 
 
 
 

Star training set for 523955, (2022/10/20 09:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:13.9 +16:33:12  0.8  8.06  77
Alnath         05:27:44.1 +28:37:28  1.6 10.70  64
104 Tau        05:08:47.9 +18:40:26  5.6  0.25  70
PPM 120566     05:06:09.9 +18:17:02  7.7  0.97  70
104 Tau        05:08:47.9 +18:40:26  5.6  0.25  70
523955         05:09:48.1 +18:44:16 14.6        69
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 1.3 sigma about the mid-time.
The median site spacing is 26.0 km RECON observability=1.0 and success probability=7.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 09:53:39 -42.0 Dark Up 54.2 145.9 Up 09:38:39 - 10:08:39 6915
Kelowna 09:53:37 -42.2 Dark Up 55.2 146.7 Up 09:38:37 - 10:08:37 6826
Peachland 09:53:39 -42.4 Dark Up 55.2 146.1 Up 09:38:39 - 10:08:39 6824
Victoria 09:54:00 -44.9 Dark Up 54.8 139.7 Up 09:39:00 - 10:09:00 6814
Summerland 09:53:40 -42.4 Dark Up 55.4 146.1 Up 09:38:40 - 10:08:40 6809
Penticton 09:53:39 -42.4 Dark Up 55.5 146.3 Up 09:38:39 - 10:08:39 6801
Oliver 09:53:40 -42.7 Dark Up 55.8 146.0 Up 09:38:40 - 10:08:40 6771
Anarchist Mountain Observatory 09:53:41 -42.7 Dark Up 56.0 146.1 Up 09:38:41 - 10:08:41 6752
Tonasket 09:53:42 -42.9 Dark Up 56.2 145.8 Up 09:38:42 - 10:08:42 6728
Sleaford 09:52:29 -34.2 Dark Up 56.3 169.6 Up 09:37:29 - 10:07:29 6718
Okanogan 09:53:45 -43.2 Dark Up 56.4 145.3 Up 09:38:45 - 10:08:45 6703
Brewster 09:53:47 -43.5 Dark Up 56.6 144.7 Up 09:38:47 - 10:08:47 6685
Manson/Chelan 09:53:47 -43.8 Dark Up 56.6 144.0 Up 09:38:47 - 10:08:47 6676
Wenatchee 09:53:52 -44.2 Dark Up 56.9 143.3 Up 09:38:52 - 10:08:52 6640
Ellensburg 09:53:52 -44.6 Dark Up 57.2 142.6 Up 09:38:52 - 10:08:52 6610
Yakima 09:53:54 -44.9 Dark Up 57.5 142.2 Up 09:38:54 - 10:08:54 6576
Toppenish/White Swan 09:53:55 -45.0 Dark Up 57.7 142.3 Up 09:38:55 - 10:08:55 6553
Goldendale 09:53:59 -45.6 Dark Up 58.0 141.1 Up 09:38:59 - 10:08:59 6516
The Dalles 09:54:01 -45.9 Dark Up 58.0 140.3 Up 09:39:01 - 10:09:01 6506
PNWRO 09:53:50 -44.5 Dark Up 58.6 144.3 Up 09:38:50 - 10:08:50 6481
Maupin 09:54:01 -46.1 Dark Up 58.4 140.0 Up 09:39:01 - 10:09:01 6466
Sisters 09:54:08 -47.0 Dark Up 58.8 138.3 Up 09:39:08 - 10:09:08 6403
Bend 09:54:06 -47.0 Dark Up 59.1 138.5 Up 09:39:06 - 10:09:06 6375
Oregon Observatory 09:54:09 -47.2 Dark Up 59.2 138.1 Up 09:39:09 - 10:09:09 6363
North Lake 09:54:09 -47.3 Dark Up 59.9 138.2 Up 09:39:09 - 10:09:09 6291
Chiloquin 09:54:09 -48.3 Dark Up 60.0 135.9 Up 09:39:09 - 10:09:09 6258
Klamath Falls 09:54:09 -48.5 Dark Up 60.2 135.6 Up 09:39:09 - 10:09:09 6225
Lakeview 09:54:09 -47.7 Dark Up 61.0 137.9 Up 09:39:09 - 10:09:09 6180
Cedarville 09:54:09 -48.0 Dark Up 61.6 137.4 Up 09:39:09 - 10:09:09 6115
Fall River/Burney 09:54:09 -49.0 Dark Up 61.3 134.7 Up 09:39:09 - 10:09:09 6107
Susanville 09:54:10 -49.0 Dark Up 62.1 135.1 Up 09:39:10 - 10:09:10 6027
Greenville 09:54:09 -49.3 Dark Up 62.2 134.3 Up 09:39:09 - 10:09:09 6011
Gimple 09:54:09 -49.3 Dark Up 62.2 134.4 Up 09:39:09 - 10:09:09 6008
Quincy 09:54:09 -49.4 Dark Up 62.3 134.0 Up 09:39:09 - 10:09:09 5993
Portola 09:54:09 -49.2 Dark Up 62.6 134.6 Up 09:39:09 - 10:09:09 5967
Reno 09:54:10 -49.0 Dark Up 63.2 135.4 Up 09:39:10 - 10:09:10 5922
Carson City 09:54:10 -49.2 Dark Up 63.5 134.9 Up 09:39:10 - 10:09:10 5888
Gardnerville 09:54:10 -49.3 Dark Up 63.7 134.6 Up 09:39:10 - 10:09:10 5864
Yerington 09:54:09 -48.9 Dark Up 63.9 135.7 Up 09:39:09 - 10:09:09 5851
Hawthorne 09:54:09 -48.8 Dark Up 64.6 136.0 Up 09:39:09 - 10:09:09 5791
Lee Vining 09:54:09 -49.4 Dark Up 64.7 134.3 Up 09:39:09 - 10:09:09 5753
Tonopah 09:54:08 -48.1 Dark Up 65.7 137.9 Up 09:39:08 - 10:09:08 5706
Bishop 09:54:09 -49.3 Dark Up 65.5 134.7 Up 09:39:09 - 10:09:09 5674
Dunrhomin 09:52:53 -39.0 Dark Up 68.0 166.7 Up 09:37:53 - 10:07:53 5600
Beatty 09:54:07 -48.4 Dark Up 66.8 137.0 Up 09:39:07 - 10:09:07 5581
CU-SBO 09:52:55 -39.2 Dark Up 68.2 166.4 Up 09:37:55 - 10:07:55 5578
Indian Springs 09:54:02 -47.8 Dark Up 67.6 138.6 Up 09:39:02 - 10:09:02 5518
Henderson 09:53:59 -47.6 Dark Up 68.3 139.2 Up 09:38:59 - 10:08:59 5445
Wildwood 09:54:09 -51.1 Dark Up 67.6 128.7 Up 09:39:09 - 10:09:09 5369
Patrick 09:53:57 -47.1 Dark Up 69.4 140.6 Up 09:38:57 - 10:08:57 5352
Laughlin/Bullhead City 09:54:00 -47.7 Dark Up 69.2 138.6 Up 09:39:00 - 10:09:00 5348
Kingman/Dolan Springs 09:53:58 -47.3 Dark Up 69.5 139.8 Up 09:38:58 - 10:08:58 5335
Mohave Valley 09:54:01 -47.8 Dark Up 69.4 138.2 Up 09:39:01 - 10:09:01 5321
Lake Havasu City 09:54:00 -47.8 Dark Up 69.9 138.0 Up 09:39:00 - 10:09:00 5274
Idyllwild 09:54:10 -49.9 Dark Up 69.0 131.6 Up 09:39:10 - 10:09:10 5272
Parker 09:54:01 -48.0 Dark Up 70.1 137.4 Up 09:39:01 - 10:09:01 5238
Calipatria 09:54:10 -49.3 Dark Up 70.1 132.8 Up 09:39:10 - 10:09:10 5174
George/Scottsdale 09:53:49 -46.3 Dark Up 71.7 142.3 Up 09:38:49 - 10:08:49 5125
Yuma 09:54:07 -48.8 Dark Up 71.0 133.8 Up 09:39:07 - 10:09:07 5104

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 523955, (2022/10/20 09:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  8.06  77
Alnath         05:26:17.6 +28:36:23  1.6 10.70  64
104 Tau        05:07:27.8 +18:38:43  5.6  0.25  70
PPM 120566     05:04:50.0 +18:15:14  7.7  0.97  70
104 Tau        05:07:27.8 +18:38:43  5.6  0.25  70
523955         05:08:27.9 +18:42:35 14.6        69
Positions are for J2000

Event circumstances last updated at 2022/03/16 01:00:08 UT

Marc W. Buie, Southwest Research Institute

RECON