RECON: TNO occultation with 312645

Event between (312645) 10EP65 and star GA0800:04440340 with event index number of 1110849

Geocentric closest approach at 2021/04/21 10:00:35 UTC

J2000 position of star is 13:53:48.5 -09:49:14
Equinox of date position of star is 13:54:56.0 -09:55:26
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 75 degrees from the moon. Moon is 62% illuminated.
TNO apparent brightness V=20.7

[RECON map]
TNO is 33.2 AU from the Sun and 32.2 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 57 seconds.
The 1-sigma cross-track error in the shadow position is 1191 km.
The sky-plane scale is 23386.2 km/arcsec.

The TNO has an absolute magnitude Hv=5.5
Diameter=469.9 km assuming a 5% albedo -- 19.5 sec chord
Diameter=191.8 km assuming a 30% albedo -- 7.9 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 312645, (2021/04/21 10:01UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:19.1 -11:16:19  1.0  7.16  69
PPM 196876     13:48:21.2 -09:48:56  6.2  1.63  73
PPM 197027     13:57:01.0 -09:51:32  7.3  0.52  75
PPM 196991     13:54:56.1 -09:51:26  9.6  0.07  75
312645         13:54:56.4 -09:55:28 14.2        75
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 5.0 sigma about the mid-time.
The median site spacing is 9.5 km RECON observability=1.0 and success probability=0.0%
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 10:00:47 -22.0 Dark Up 23.7 214.9 Low 09:55:33 - 10:06:00 11489
Kelowna 10:00:46 -22.4 Dark Up 24.1 214.9 Low 09:55:33 - 10:06:00 11473
Peachland 10:00:47 -22.6 Dark Up 24.3 214.6 Low 09:55:33 - 10:06:00 11464
Summerland 10:00:45 -22.7 Dark Up 24.4 214.7 Low 09:55:32 - 10:05:59 11460
Penticton 10:00:45 -22.7 Dark Up 24.4 214.9 Low 09:55:31 - 10:05:58 11460
Oliver 10:00:45 -23.0 Dark Up 24.7 214.9 Low 09:55:32 - 10:05:59 11448
Anarchist Mountain Observatory 10:00:43 -23.1 Dark Up 24.8 215.2 Low 09:55:30 - 10:05:57 11446
Tonasket 10:00:43 -23.4 Dark Up 25.0 215.2 Low 09:55:29 - 10:05:56 11433
Okanogan 10:00:42 -23.7 Dark Up 25.4 215.1 Low 09:55:28 - 10:05:55 11418
Brewster 10:00:41 -24.0 Dark Up 25.7 215.0 Low 09:55:28 - 10:05:55 11404
Manson/Chelan 10:00:42 -24.3 Dark Up 26.0 214.7 Low 09:55:28 - 10:05:55 11388
Wenatchee 10:00:41 -24.8 Dark Up 26.5 214.6 Low 09:55:27 - 10:05:54 11366
Pasco 10:00:35 -25.3 Dark Up 26.9 216.2 Low 09:55:21 - 10:05:48 11346
Ellensburg 10:00:42 -25.2 Dark Up 26.9 214.5 Low 09:55:28 - 10:05:55 11346
Dunrhomin 09:59:44 -23.1 Dark Down 24.3 231.1 Low 09:54:30 - 10:04:57 11344
Victoria 10:00:52 -24.9 Dark Up 26.6 211.2 Low 09:55:39 - 10:06:06 11343
PNWRO 10:00:34 -25.4 Dark Up 27.0 216.5 Low 09:55:20 - 10:05:47 11341
Yakima 10:00:40 -25.6 Dark Up 27.2 214.6 Low 09:55:26 - 10:05:53 11329
Toppenish/White Swan 10:00:39 -25.7 Dark Up 27.3 214.9 Low 09:55:25 - 10:05:52 11324
Goldendale 10:00:39 -26.3 Dark Up 28.0 214.6 Low 09:55:25 - 10:05:52 11292
The Dalles 10:00:39 -26.6 Dark Up 28.3 214.3 Low 09:55:25 - 10:05:52 11274
Maupin 10:00:38 -26.9 Dark Up 28.6 214.5 Low 09:55:24 - 10:05:51 11259
Redmond 10:00:35 -27.7 Dark Up 29.4 214.7 Low 09:55:22 - 10:05:49 11218
Sisters 10:00:37 -27.9 Dark Up 29.5 214.3 Low 09:55:23 - 10:05:50 11210
Bend 10:00:36 -28.0 Dark Up 29.6 214.6 Low 09:55:22 - 10:05:49 11205
Oregon Observatory 10:00:35 -28.2 Dark Up 29.8 214.5 Low 09:55:22 - 10:05:49 11194
La Pine/Gilchrist 10:00:35 -28.4 Dark Up 30.0 214.5 Up 09:55:21 - 10:05:48 11184
North Lake 10:00:32 -28.5 Dark Up 30.1 215.3 Up 09:55:19 - 10:05:46 11178
Paisley 10:00:30 -28.8 Dark Up 30.4 215.8 Up 09:55:16 - 10:05:43 11160
Lakeview 10:00:28 -29.2 Dark Up 30.7 216.2 Up 09:55:14 - 10:05:41 11141
Chiloquin 10:00:33 -29.5 Dark Up 31.1 214.5 Up 09:55:20 - 10:05:47 11123
Cedarville 10:00:25 -29.6 Dark Up 31.2 216.6 Up 09:55:12 - 10:05:39 11113
Klamath Falls 10:00:32 -29.7 Dark Up 31.3 214.7 Up 09:55:19 - 10:05:46 11109
Fall River/Burney 10:00:28 -30.6 Dark Up 32.1 215.5 Up 09:55:14 - 10:05:41 11060
Susanville 10:00:24 -30.8 Dark Up 32.3 216.5 Up 09:55:11 - 10:05:38 11046
Gimple 10:00:24 -31.1 Dark Up 32.6 216.4 Up 09:55:10 - 10:05:37 11027
Greenville 10:00:22 -31.1 Dark Up 32.7 216.3 Up 09:55:09 - 10:05:36 11025
Reno 10:00:20 -31.1 Dark Up 32.6 217.7 Up 09:55:06 - 10:05:33 11022
Portola 10:00:21 -31.2 Dark Up 32.7 216.9 Up 09:55:08 - 10:05:35 11020
Quincy 10:00:23 -31.3 Dark Up 32.8 216.4 Up 09:55:10 - 10:05:37 11015
Yerington 10:00:17 -31.3 Dark Up 32.8 218.6 Up 09:55:03 - 10:05:30 11008
Tonopah 10:00:06 -31.1 Dark Up 32.5 220.9 Up 09:54:53 - 10:05:20 11004
Carson City 10:00:19 -31.4 Dark Up 32.9 217.9 Up 09:55:05 - 10:05:32 11003
Hawthorne 10:00:13 -31.4 Dark Up 32.9 219.3 Up 09:55:00 - 10:05:27 10996
Gardnerville 10:00:17 -31.6 Dark Up 33.1 218.0 Up 09:55:04 - 10:05:31 10992
Indian Springs 09:59:59 -31.5 Dark Up 32.8 223.0 Up 09:54:46 - 10:05:13 10958
Lee Vining 10:00:13 -32.1 Dark Up 33.5 219.0 Up 09:54:59 - 10:05:26 10955
Beatty 10:00:04 -31.8 Dark Up 33.2 221.8 Up 09:54:50 - 10:05:17 10951
Henderson 09:59:57 -31.5 Dark Up 32.8 223.9 Up 09:54:43 - 10:05:10 10943
Bishop 10:00:10 -32.2 Dark Up 33.6 220.0 Up 09:54:56 - 10:05:23 10939
Patrick 09:59:51 -31.4 Dark Down 32.7 225.2 Up 09:54:38 - 10:05:05 10933
Kingman/Dolan Springs 09:59:51 -31.7 Dark Down 32.9 225.2 Up 09:54:38 - 10:05:05 10916
Laughlin/Bullhead City 09:59:53 -32.0 Dark Down 33.2 224.7 Up 09:54:39 - 10:05:06 10902
Mohave Valley 09:59:52 -32.2 Dark Down 33.4 224.8 Up 09:54:38 - 10:05:05 10887
George/Scottsdale 09:59:41 -31.5 Dark Down 32.6 227.9 Up 09:54:27 - 10:04:54 10877
Lake Havasu City 09:59:48 -32.3 Dark Down 33.6 225.2 Up 09:54:34 - 10:05:01 10869
Parker 09:59:49 -32.6 Dark Down 33.8 225.4 Up 09:54:35 - 10:05:02 10849
Blythe 09:59:49 -33.1 Dark Down 34.3 225.4 Up 09:54:35 - 10:05:02 10811
Idyllwild 09:59:55 -34.2 Dark Up 35.5 223.3 Up 09:54:42 - 10:05:09 10770
CPSLO 10:00:11 -35.0 Dark Up 36.4 218.6 Up 09:54:58 - 10:05:25 10765
Calipatria 09:59:49 -34.0 Dark Down 35.2 224.7 Up 09:54:35 - 10:05:02 10760
Yuma 09:59:46 -33.8 Dark Down 35.0 225.8 Up 09:54:33 - 10:05:00 10754
Wildwood 09:59:59 -34.9 Dark Up 36.3 221.2 Up 09:54:46 - 10:05:13 10745

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 312645, (2021/04/21 10:01UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  7.16  69
PPM 196876     13:47:13.4 -09:42:35  6.2  1.63  73
PPM 197027     13:55:53.1 -09:45:19  7.3  0.52  75
PPM 196991     13:53:48.2 -09:45:12  9.6  0.07  75
312645         13:53:48.5 -09:49:14 14.2        75
Positions are for J2000

Event circumstances last updated at 2021/03/11 01:30:46 UT

Marc W. Buie, Southwest Research Institute

RECON