RECON: TNO occultation with 523615

Event between (523615) 06UO321 and star GA0980:00137232 with event index number of 2308965

Geocentric closest approach at 2023/10/23 05:10:47 UTC

J2000 position of star is 01:35:15.8 +08:15:32
Equinox of date position of star is 01:36:25.9 +08:22:19
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 71 degrees from the moon. Moon is 62% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 42.8 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 25.2 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 231 seconds.
The 1-sigma cross-track error in the shadow position is 3550 km.
The sky-plane scale is 30320.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 7.6 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 523615, (2023/10/23 05:11UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:17.4 +16:33:19  0.8 44.78 115
6Bet Ari       01:55:57.6 +20:55:24  2.6 13.39  81
PPM 144653     01:30:17.8 +07:24:59  6.4  1.82  70
PPM 144767     01:36:07.7 +08:23:45  7.8  0.10  71
523615         01:36:30.9 +08:22:48 15.9        72
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 3.9 sigma about the mid-time.
The median site spacing is 20.8 km RECON observability=1.0 and success probability=7.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:11:13 -39.6 Dark Up 38.7 133.4 Up 04:56:13 - 05:26:13 5339
Victoria 05:11:25 -39.2 Dark Up 38.6 128.7 Up 04:56:25 - 05:26:25 5294
Peachland 05:11:14 -40.4 Dark Up 39.6 133.5 Up 04:56:14 - 05:26:14 5270
Kelowna 05:11:13 -40.5 Dark Up 39.6 133.9 Up 04:56:13 - 05:26:13 5268
Summerland 05:11:14 -40.6 Dark Up 39.7 133.5 Up 04:56:14 - 05:26:14 5258
Penticton 05:11:14 -40.7 Dark Up 39.8 133.6 Up 04:56:14 - 05:26:14 5251
Oliver 05:11:16 -40.9 Dark Up 40.1 133.4 Up 04:56:16 - 05:26:16 5230
Anarchist Mountain Observatory 05:11:15 -41.1 Dark Up 40.3 133.5 Up 04:56:15 - 05:26:15 5215
Tonasket 05:11:17 -41.2 Dark Up 40.5 133.2 Up 04:56:17 - 05:26:17 5198
Okanogan 05:11:18 -41.4 Dark Up 40.6 132.9 Up 04:56:18 - 05:26:18 5181
Brewster 05:11:19 -41.4 Dark Up 40.7 132.5 Up 04:56:19 - 05:26:19 5170
Manson/Chelan 05:11:20 -41.4 Dark Up 40.7 131.9 Up 04:56:20 - 05:26:20 5168
Wenatchee 05:11:23 -41.5 Dark Up 40.9 131.4 Up 04:56:23 - 05:26:23 5143
Ellensburg 05:11:24 -41.7 Dark Up 41.1 130.9 Up 04:56:24 - 05:26:24 5123
Yakima 05:11:25 -41.9 Dark Up 41.3 130.6 Up 04:56:25 - 05:26:25 5098
Toppenish/White Swan 05:11:25 -42.1 Dark Up 41.6 130.7 Up 04:56:25 - 05:26:25 5079
Goldendale 05:11:28 -42.2 Dark Up 41.7 129.8 Up 04:56:28 - 05:26:28 5056
The Dalles 05:11:30 -42.1 Dark Up 41.6 129.3 Up 04:56:30 - 05:26:30 5052
Sleaford 05:10:37 -44.7 Dark Up 43.0 151.4 Up 04:55:37 - 05:25:37 5049
Maupin 05:11:30 -42.4 Dark Up 42.0 129.1 Up 04:56:30 - 05:26:30 5022
PNWRO 05:11:23 -43.2 Dark Up 42.6 132.1 Up 04:56:23 - 05:26:23 5013
Sisters 05:11:34 -42.6 Dark Up 42.3 128.0 Up 04:56:34 - 05:26:34 4979
Bend 05:11:34 -42.8 Dark Up 42.5 128.1 Up 04:56:34 - 05:26:34 4956
Oregon Observatory 05:11:35 -42.9 Dark Up 42.6 127.8 Up 04:56:35 - 05:26:35 4948
North Lake 05:11:35 -43.5 Dark Up 43.3 128.0 Up 04:56:35 - 05:26:35 4889
Chiloquin 05:11:40 -43.3 Dark Up 43.1 126.4 Up 04:56:40 - 05:26:40 4871
Klamath Falls 05:11:41 -43.5 Dark Up 43.4 126.2 Up 04:56:41 - 05:26:41 4845
Lakeview 05:11:37 -44.4 Dark Up 44.3 127.8 Up 04:56:37 - 05:26:37 4800
Fall River/Burney 05:11:43 -44.3 Dark Up 44.3 125.8 Up 04:56:43 - 05:26:43 4752
Cedarville 05:11:39 -44.9 Dark Up 44.8 127.5 Up 04:56:39 - 05:26:39 4748
Susanville 05:11:43 -45.1 Dark Up 45.2 126.1 Up 04:56:43 - 05:26:43 4684
Greenville 05:11:44 -45.1 Dark Up 45.1 125.5 Up 04:56:44 - 05:26:44 4673
Gimple 05:11:45 -45.1 Dark Up 45.2 125.6 Up 04:56:45 - 05:26:45 4670
Quincy 05:11:45 -45.2 Dark Up 45.3 125.4 Up 04:56:45 - 05:26:45 4658
Portola 05:11:44 -45.6 Dark Up 45.6 125.8 Up 04:56:44 - 05:26:44 4635
Reno 05:11:44 -46.1 Dark Up 46.2 126.3 Up 04:56:44 - 05:26:44 4595
Carson City 05:11:44 -46.3 Dark Up 46.4 126.0 Up 04:56:44 - 05:26:44 4568
Gardnerville 05:11:45 -46.5 Dark Up 46.6 125.8 Up 04:56:45 - 05:26:45 4548
Yerington 05:11:43 -46.8 Dark Up 46.9 126.5 Up 04:56:43 - 05:26:43 4533
Hawthorne 05:11:43 -47.4 Dark Up 47.5 126.7 Up 04:56:43 - 05:26:43 4482
Lee Vining 05:11:46 -47.4 Dark Up 47.6 125.7 Up 04:56:46 - 05:26:46 4455
Tonopah 05:11:41 -48.6 Dark Up 48.7 127.9 Up 04:56:41 - 05:26:41 4401
Bishop 05:11:45 -48.2 Dark Up 48.4 126.0 Up 04:56:45 - 05:26:45 4386
Beatty 05:11:43 -49.5 Dark Up 49.7 127.4 Up 04:56:43 - 05:26:43 4296
Indian Springs 05:11:41 -50.4 Dark Up 50.6 128.4 Up 04:56:41 - 05:26:41 4235
Dunrhomin 05:11:02 -54.4 Dark Up 53.4 145.7 Up 04:56:02 - 05:26:02 4182
Henderson 05:11:40 -51.2 Dark Up 51.3 128.7 Up 04:56:40 - 05:26:40 4169
CU-SBO 05:11:03 -54.5 Dark Up 53.6 145.3 Up 04:56:03 - 05:26:03 4165
Wildwood 05:11:55 -49.5 Dark Up 50.1 122.6 Up 04:56:55 - 05:26:55 4136
Laughlin/Bullhead City 05:11:41 -51.9 Dark Up 52.2 128.3 Up 04:56:41 - 05:26:41 4085
Patrick 05:11:39 -52.3 Dark Up 52.4 129.5 Up 04:56:39 - 05:26:39 4082
Kingman/Dolan Springs 05:11:40 -52.3 Dark Up 52.5 129.0 Up 04:56:40 - 05:26:40 4070
Mohave Valley 05:11:41 -52.1 Dark Up 52.3 128.1 Up 04:56:41 - 05:26:41 4063
Idyllwild 05:11:51 -51.1 Dark Up 51.6 124.4 Up 04:56:51 - 05:26:51 4043
Lake Havasu City 05:11:42 -52.4 Dark Up 52.7 128.0 Up 04:56:42 - 05:26:42 4022
Parker 05:11:43 -52.6 Dark Up 53.0 127.6 Up 04:56:43 - 05:26:43 3992
Calipatria 05:11:49 -52.2 Dark Up 52.8 125.1 Up 04:56:49 - 05:26:49 3951
Yuma 05:11:47 -53.1 Dark Up 53.6 125.7 Up 04:56:47 - 05:26:47 3884
George/Scottsdale 05:11:37 -54.6 Dark Up 54.8 130.3 Up 04:56:37 - 05:26:37 3873

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 523615, (2023/10/23 05:11UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 44.78 115
6Bet Ari       01:54:38.5 +20:48:26  2.6 13.39  81
PPM 144653     01:29:03.1 +07:17:38  6.4  1.82  70
PPM 144767     01:34:52.6 +08:16:29  7.8  0.10  71
523615         01:35:15.8 +08:15:32 15.9        71
Positions are for J2000

Event circumstances last updated at 2022/03/22 00:38:22 UT

Marc W. Buie, Southwest Research Institute

RECON