RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1200:01929236 with event index number of 2298174

Geocentric closest approach at 2023/01/31 03:39:40 UTC

J2000 position of star is 05:47:43.8 +31:21:45
Equinox of date position of star is 05:49:10.1 +31:22:07
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 18 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 18.4 AU from the Sun and 17.7 AU from the Earth.
The TNO is moving 17.8 km/sec on the sky relative to the star, or, 5.0 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 2812 km.
The sky-plane scale is 12802.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 4.3 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2023/01/31 03:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:14.9 +16:33:14  0.8 22.07   8
Alnath         05:27:45.2 +28:37:29  1.6  5.40  13
PPM 070700     05:42:05.6 +31:22:07  5.9  1.52  17
PPM 070839     05:48:44.2 +31:39:59  7.8  0.32  18
PPM 070866     05:49:55.8 +31:12:56  9.3  0.21  18
248835         05:49:13.5 +31:22:08 15.6        19
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 26.3 km RECON observability=1.0 and success probability=10.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:40:13 -26.9 Dark Up 64.7 131.2 Up 03:25:13 - 03:55:13 5245
Victoria 03:40:31 -25.1 Dark Up 64.4 122.9 Up 03:25:31 - 03:55:31 5193
Peachland 03:40:15 -27.4 Dark Up 65.6 130.8 Up 03:25:15 - 03:55:15 5147
Kelowna 03:40:13 -27.6 Dark Up 65.6 131.4 Up 03:25:13 - 03:55:13 5144
Summerland 03:40:16 -27.5 Dark Up 65.7 130.7 Up 03:25:16 - 03:55:16 5131
Penticton 03:40:15 -27.5 Dark Up 65.8 130.7 Up 03:25:15 - 03:55:15 5121
Oliver 03:40:17 -27.6 Dark Up 66.0 130.2 Up 03:25:17 - 03:55:17 5092
Anarchist Mountain Observatory 03:40:17 -27.7 Dark Up 66.3 130.2 Up 03:25:17 - 03:55:17 5070
Tonasket 03:40:18 -27.7 Dark Up 66.4 129.5 Up 03:25:18 - 03:55:18 5047
Okanogan 03:40:19 -27.6 Dark Up 66.6 128.7 Up 03:25:19 - 03:55:19 5025
Brewster 03:40:21 -27.5 Dark Up 66.6 127.9 Up 03:25:21 - 03:55:21 5011
Manson/Chelan 03:40:23 -27.3 Dark Up 66.6 126.9 Up 03:25:23 - 03:55:23 5008
Wenatchee 03:40:26 -27.2 Dark Up 66.8 125.7 Up 03:25:26 - 03:55:26 4976
Ellensburg 03:40:28 -27.1 Dark Up 66.9 124.6 Up 03:25:28 - 03:55:28 4950
Yakima 03:40:30 -27.1 Dark Up 67.1 123.8 Up 03:25:30 - 03:55:30 4917
Toppenish/White Swan 03:40:30 -27.2 Dark Up 67.3 123.6 Up 03:25:30 - 03:55:30 4892
Goldendale 03:40:34 -27.0 Dark Up 67.4 121.9 Up 03:25:34 - 03:55:34 4863
Sleaford 03:39:22 -35.3 Dark Up 68.5 161.3 Up 03:24:22 - 03:54:22 4861
The Dalles 03:40:36 -26.7 Dark Up 67.3 120.8 Up 03:25:36 - 03:55:36 4860
Maupin 03:40:37 -26.8 Dark Up 67.6 120.1 Up 03:25:37 - 03:55:37 4820
PNWRO 03:40:26 -28.3 Dark Up 68.4 125.4 Up 03:25:26 - 03:55:26 4798
Sisters 03:40:42 -26.5 Dark Up 67.7 117.5 Up 03:25:42 - 03:55:42 4767
Bend 03:40:42 -26.7 Dark Up 68.0 117.4 Up 03:25:42 - 03:55:42 4736
Oregon Observatory 03:40:43 -26.6 Dark Up 68.0 116.8 Up 03:25:43 - 03:55:43 4727
North Lake 03:40:44 -27.0 Dark Up 68.6 116.2 Up 03:25:44 - 03:55:44 4648
Chiloquin 03:40:49 -26.3 Dark Up 68.3 113.3 Up 03:25:49 - 03:55:49 4633
Klamath Falls 03:40:50 -26.4 Dark Up 68.5 112.6 Up 03:25:50 - 03:55:50 4600
Lakeview 03:40:46 -27.4 Dark Up 69.4 114.6 Up 03:25:46 - 03:55:46 4532
Fall River/Burney 03:40:50 -26.7 Dark Up 69.1 110.3 Up 03:25:50 - 03:55:50 4481
Cedarville 03:40:48 -27.6 Dark Up 69.8 113.2 Up 03:25:48 - 03:55:48 4467
Susanville 03:40:50 -27.2 Dark Up 69.9 109.7 Up 03:25:50 - 03:55:50 4392
Greenville 03:40:50 -27.0 Dark Up 69.8 108.6 Up 03:25:50 - 03:55:50 4382
Gimple 03:40:50 -27.1 Dark Up 69.8 108.7 Up 03:25:50 - 03:55:50 4378
Quincy 03:40:50 -27.0 Dark Up 69.8 108.1 Up 03:25:50 - 03:55:50 4364
Portola 03:40:50 -27.4 Dark Up 70.2 108.4 Up 03:25:50 - 03:55:50 4331
Reno 03:40:50 -27.9 Dark Up 70.8 108.6 Up 03:25:50 - 03:55:50 4276
Carson City 03:40:50 -27.9 Dark Up 70.9 107.6 Up 03:25:50 - 03:55:50 4244
Gardnerville 03:40:50 -27.9 Dark Up 71.0 107.0 Up 03:25:50 - 03:55:50 4220
Yerington 03:40:50 -28.4 Dark Up 71.4 107.9 Up 03:25:50 - 03:55:50 4197
Hawthorne 03:40:50 -28.8 Dark Up 72.0 107.3 Up 03:25:50 - 03:55:50 4130
Lee Vining 03:40:50 -28.4 Dark Up 71.8 105.0 Up 03:25:50 - 03:55:50 4104
Tonopah 03:40:49 -29.9 Dark Up 73.2 107.8 Up 03:25:49 - 03:55:49 4022
Bishop 03:40:50 -29.0 Dark Up 72.5 104.1 Up 03:25:50 - 03:55:50 4015
Beatty 03:40:50 -30.3 Dark Up 73.8 104.7 Up 03:25:50 - 03:55:50 3895
Indian Springs 03:40:48 -31.1 Dark Up 74.8 105.0 Up 03:25:48 - 03:55:48 3815
Henderson 03:40:47 -31.7 Dark Up 75.4 103.9 Up 03:25:47 - 03:55:47 3733
Wildwood 03:41:08 -28.8 Dark Up 72.9 93.6 Up 03:26:08 - 03:56:08 3725
Dunrhomin 03:39:53 -38.8 Dark Up 79.5 145.3 Up 03:24:53 - 03:54:53 3721
CU-SBO 03:39:54 -38.8 Dark Up 79.6 144.1 Up 03:24:54 - 03:54:54 3700
Laughlin/Bullhead City 03:40:48 -32.0 Dark Up 76.0 101.1 Up 03:25:48 - 03:55:48 3633
Patrick 03:40:45 -32.6 Dark Up 76.5 103.0 Up 03:25:45 - 03:55:45 3623
Kingman/Dolan Springs 03:40:47 -32.5 Dark Up 76.4 101.9 Up 03:25:47 - 03:55:47 3611
Mohave Valley 03:40:49 -32.1 Dark Up 76.0 100.1 Up 03:25:49 - 03:55:49 3607
Idyllwild 03:40:50 -30.3 Dark Up 74.4 93.7 Up 03:25:50 - 03:55:50 3606
Lake Havasu City 03:40:49 -32.3 Dark Up 76.3 98.7 Up 03:25:49 - 03:55:49 3558
Parker 03:40:50 -32.3 Dark Up 76.4 97.3 Up 03:25:50 - 03:55:50 3523
Calipatria 03:40:50 -31.3 Dark Up 75.4 92.3 Up 03:25:50 - 03:55:50 3489
Yuma 03:40:50 -32.0 Dark Up 76.2 91.2 Up 03:25:50 - 03:55:50 3404
George/Scottsdale 03:40:41 -34.3 Dark Up 78.4 98.0 Up 03:25:41 - 03:55:41 3370

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 248835, (2023/01/31 03:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 22.07   8
Alnath         05:26:17.6 +28:36:23  1.6  5.40  13
PPM 070700     05:40:35.9 +31:21:29  5.9  1.52  17
PPM 070839     05:47:14.3 +31:39:34  7.8  0.32  18
PPM 070866     05:48:26.1 +31:12:34  9.3  0.21  18
248835         05:47:43.8 +31:21:45 15.6        18
Positions are for J2000

Event circumstances last updated at 2022/03/18 00:56:36 UT

Marc W. Buie, Southwest Research Institute

RECON