RECON: TNO occultation with 531076

Event between (531076) 12DA99 and star GA0820:04368052 with event index number of 1600734

Geocentric closest approach at 2023/04/17 10:30:01 UTC

J2000 position of star is 13:28:23.4 -07:17:58
Equinox of date position of star is 13:29:31.8 -07:24:43
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 148 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 41.4 AU from the Sun and 40.4 AU from the Earth.
The TNO is moving 25.0 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 204 seconds.
The 1-sigma cross-track error in the shadow position is 3619 km.
The sky-plane scale is 29268.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=260.6 km assuming a 5% albedo -- 10.4 sec chord
Diameter=106.4 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 531076, (2023/04/17 10:30UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:25.4 -11:16:56  1.0  3.94 147
72 Vir         13:31:38.8 -06:35:23  6.5  0.97 148
PPM 196531     13:28:54.3 -06:56:09  8.3  0.51 148
PPM 196539     13:29:14.1 -07:08:50  9.0  0.29 148
531076         13:29:36.5 -07:25:11 15.7       148
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 4.4 sigma about the mid-time.
The median site spacing is 13.0 km RECON observability=1.0 and success probability=6.7%
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 10:29:36 -20.8 Dark Down 22.3 225.0 Low 10:14:36 - 10:44:36 300
Kelowna 10:29:35 -21.1 Dark Down 22.6 225.0 Low 10:14:35 - 10:44:35 283
Peachland 10:29:35 -21.3 Dark Down 22.8 224.7 Low 10:14:35 - 10:44:35 275
Summerland 10:29:35 -21.4 Dark Down 22.9 224.9 Low 10:14:35 - 10:44:35 270
Penticton 10:29:34 -21.4 Dark Down 22.9 225.0 Low 10:14:34 - 10:44:34 269
Oliver 10:29:33 -21.7 Dark Down 23.1 225.1 Low 10:14:33 - 10:44:33 255
Anarchist Mountain Observatory 10:29:32 -21.7 Dark Down 23.2 225.3 Low 10:14:32 - 10:44:32 251
Tonasket 10:29:32 -22.0 Dark Down 23.4 225.3 Low 10:14:32 - 10:44:32 237
Okanogan 10:29:31 -22.3 Dark Down 23.7 225.3 Low 10:14:31 - 10:44:31 221
Brewster 10:29:30 -22.6 Dark Down 24.0 225.2 Low 10:14:30 - 10:44:30 207
Manson/Chelan 10:29:31 -22.9 Dark Down 24.3 224.9 Low 10:14:31 - 10:44:31 193
Victoria 10:29:40 -23.8 Dark Down 25.3 221.6 Low 10:14:40 - 10:44:40 171
Wenatchee 10:29:30 -23.4 Dark Down 24.8 224.9 Low 10:14:30 - 10:44:30 170
Ellensburg 10:29:29 -23.8 Dark Down 25.2 224.8 Low 10:14:29 - 10:44:29 149
Pasco 10:29:24 -23.7 Dark Down 25.0 226.4 Low 10:14:24 - 10:44:24 136
Yakima 10:29:28 -24.1 Dark Down 25.5 224.9 Low 10:14:28 - 10:44:28 130
PNWRO 10:29:22 -23.8 Dark Down 25.0 226.7 Low 10:14:22 - 10:44:22 129
Toppenish/White Swan 10:29:27 -24.2 Dark Down 25.5 225.2 Low 10:14:27 - 10:44:27 123
Goldendale 10:29:26 -24.8 Dark Down 26.1 224.9 Low 10:14:26 - 10:44:26 91
The Dalles 10:29:26 -25.2 Dark Down 26.5 224.7 Low 10:14:26 - 10:44:26 75
Maupin 10:29:25 -25.4 Dark Down 26.7 224.9 Low 10:14:25 - 10:44:25 57
Redmond 10:29:23 -26.2 Dark Down 27.4 225.1 Low 10:14:23 - 10:44:23 12
Dunrhomin 10:28:35 -20.1 Dark Down 20.5 240.4 Low 10:13:35 - 10:43:35 12
Sisters 10:29:24 -26.3 Dark Down 27.6 224.7 Low 10:14:24 - 10:44:24 7
Bend 10:29:22 -26.4 Dark Down 27.6 225.1 Low 10:14:22 - 10:44:22 0
Oregon Observatory 10:29:22 -26.6 Dark Down 27.8 225.0 Low 10:14:22 - 10:44:22 -11
La Pine/Gilchrist 10:29:22 -26.8 Dark Down 28.0 225.0 Low 10:14:22 - 10:44:22 -22
North Lake 10:29:19 -26.8 Dark Down 28.0 225.8 Low 10:14:19 - 10:44:19 -34
Paisley 10:29:17 -27.1 Dark Down 28.2 226.3 Low 10:14:17 - 10:44:17 -57
Lakeview 10:29:15 -27.4 Dark Down 28.4 226.7 Low 10:14:15 - 10:44:15 -80
Chiloquin 10:29:19 -27.8 Dark Down 29.0 225.1 Low 10:14:19 - 10:44:19 -85
Klamath Falls 10:29:18 -28.0 Dark Down 29.2 225.3 Low 10:14:18 - 10:44:18 -102
Cedarville 10:29:12 -27.8 Dark Down 28.8 227.1 Low 10:14:12 - 10:44:12 -112
Fall River/Burney 10:29:14 -28.7 Dark Down 29.8 226.1 Low 10:14:14 - 10:44:14 -159
Susanville 10:29:11 -28.8 Dark Down 29.8 227.1 Low 10:14:11 - 10:44:11 -181
Gimple 10:29:10 -29.2 Dark Down 30.1 227.0 Up 10:14:10 - 10:44:10 -200
Greenville 10:29:11 -29.2 Dark Down 30.2 226.9 Up 10:14:11 - 10:44:11 -201
Portola 10:29:08 -29.2 Dark Down 30.1 227.5 Up 10:14:08 - 10:44:08 -211
Quincy 10:29:10 -29.3 Dark Down 30.3 227.0 Up 10:14:10 - 10:44:10 -212
Reno 10:29:06 -29.1 Dark Down 30.0 228.2 Low 10:14:06 - 10:44:06 -215
Carson City 10:29:05 -29.3 Dark Down 30.2 228.4 Up 10:14:05 - 10:44:05 -235
Yerington 10:29:03 -29.1 Dark Down 29.9 229.1 Low 10:14:03 - 10:44:03 -236
Gardnerville 10:29:04 -29.5 Dark Down 30.3 228.6 Up 10:14:04 - 10:44:04 -249
Hawthorne 10:29:00 -29.2 Dark Down 29.9 229.8 Low 10:14:00 - 10:44:00 -254
Tonopah 10:28:55 -28.7 Dark Down 29.4 231.2 Low 10:13:55 - 10:43:55 -258
Lee Vining 10:29:00 -29.8 Dark Down 30.6 229.6 Up 10:14:00 - 10:44:00 -295
Bishop 10:28:56 -29.9 Dark Down 30.6 230.5 Up 10:13:56 - 10:43:56 -319
Beatty 10:28:51 -29.2 Dark Down 29.8 232.1 Low 10:13:51 - 10:43:51 -320
Indian Springs 10:28:47 -28.8 Dark Down 29.4 233.2 Low 10:13:47 - 10:43:47 -324
Henderson 10:28:44 -28.8 Dark Down 29.2 234.0 Low 10:13:44 - 10:43:44 -346
Patrick 10:28:39 -28.5 Dark Down 28.9 235.2 Low 10:13:39 - 10:43:39 -368
Kingman/Dolan Springs 10:28:39 -28.8 Dark Down 29.1 235.2 Low 10:13:39 - 10:43:39 -384
Laughlin/Bullhead City 10:28:41 -29.1 Dark Down 29.5 234.8 Low 10:13:41 - 10:43:41 -394
Mohave Valley 10:28:40 -29.3 Dark Down 29.6 234.9 Low 10:13:40 - 10:43:40 -411
Lake Havasu City 10:28:38 -29.4 Dark Down 29.7 235.3 Low 10:13:38 - 10:43:38 -433
George/Scottsdale 10:28:29 -28.3 Dark Down 28.5 237.6 Low 10:13:29 - 10:43:29 -447
Parker 10:28:37 -29.6 Dark Down 29.9 235.5 Low 10:13:37 - 10:43:37 -455
CPSLO 10:28:57 -32.6 Dark Down 33.3 229.4 Up 10:13:57 - 10:43:57 -486
Blythe 10:28:36 -30.1 Dark Down 30.4 235.5 Up 10:13:36 - 10:43:36 -493
Idyllwild 10:28:42 -31.4 Dark Down 31.7 233.6 Up 10:13:42 - 10:43:42 -518
Wildwood 10:28:48 -32.3 Dark Down 32.8 231.8 Up 10:13:48 - 10:43:48 -527
Calipatria 10:28:37 -31.0 Dark Down 31.3 234.9 Up 10:13:37 - 10:43:37 -540
Yuma 10:28:33 -30.7 Dark Down 30.9 235.9 Up 10:13:33 - 10:43:33 -554

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 531076, (2023/04/17 10:30UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  3.94 147
72 Vir         13:30:25.8 -06:28:13  6.5  0.97 148
PPM 196531     13:27:41.2 -06:48:57  8.3  0.51 148
PPM 196539     13:28:01.0 -07:01:38  9.0  0.29 148
531076         13:28:23.4 -07:17:58 15.7       148
Positions are for J2000

Event circumstances last updated at 2021/10/17 01:11:18 UT

Marc W. Buie, Southwest Research Institute

RECON