RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1380:05678133 with event index number of 2201092

Geocentric closest approach at 2021/10/03 04:44:53 UTC

J2000 position of star is 19:45:55.8 +48:53:53
Equinox of date position of star is 19:46:32.8 +48:57:07
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 107 degrees from the moon. Moon is 13% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 14.1 AU from the Sun and 13.8 AU from the Earth.
The TNO is moving 34.9 km/sec on the sky relative to the star, or, 12.6 arcsec/hr.
The 1-sigma error in the time of the event is 32 seconds.
The 1-sigma cross-track error in the shadow position is 532 km.
The sky-plane scale is 9988.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.4 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2021/10/03 04:45UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:10.5 +45:21:32  1.3 10.10 115
PPM 058957     19:52:45.6 +47:59:19  5.5  1.41 108
PPM 058728     19:43:27.2 +48:29:18  8.4  0.69 107
PPM 058836     19:47:38.1 +48:59:12  9.2  0.18 107
342842         19:46:32.9 +48:57:08 16.8       107
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 16.1 km RECON observability=1.0 and success probability=56.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 04:44:38 -28.8 Dark Down 74.6 280.2 Up 04:41:27 - 04:47:49 192
Clarence Fulton 04:44:29 -30.1 Dark Down 72.3 276.3 Up 04:41:18 - 04:47:40 47
Peachland 04:44:31 -30.2 Dark Down 72.5 277.6 Up 04:41:20 - 04:47:42 43
Kelowna 04:44:30 -30.3 Dark Down 72.3 277.4 Up 04:41:19 - 04:47:41 33
Summerland 04:44:31 -30.3 Dark Down 72.4 278.1 Up 04:41:20 - 04:47:42 29
Penticton 04:44:31 -30.4 Dark Down 72.3 278.4 Up 04:41:20 - 04:47:42 18
Oliver 04:44:32 -30.6 Dark Down 72.3 279.5 Up 04:41:21 - 04:47:43 -3
Anarchist Mountain Observatory 04:44:32 -30.8 Dark Down 72.1 280.1 Up 04:41:21 - 04:47:43 -24
Tonasket 04:44:33 -30.9 Dark Down 72.1 281.0 Up 04:41:22 - 04:47:44 -38
Manson/Chelan 04:44:36 -31.0 Dark Down 72.4 283.3 Up 04:41:25 - 04:47:47 -43
Okanogan 04:44:34 -31.0 Dark Down 72.1 282.0 Up 04:41:23 - 04:47:45 -49
Brewster 04:44:35 -31.1 Dark Down 72.2 282.7 Up 04:41:24 - 04:47:46 -53
Wenatchee 04:44:38 -31.1 Dark Down 72.4 284.7 Up 04:41:27 - 04:47:49 -60
Ellensburg 04:44:39 -31.2 Dark Down 72.4 285.9 Up 04:41:28 - 04:47:50 -70
Yakima 04:44:40 -31.4 Dark Down 72.3 287.1 Up 04:41:29 - 04:47:51 -92
The Dalles 04:44:44 -31.6 Dark Down 72.4 290.1 Up 04:41:33 - 04:47:55 -109
Toppenish/White Swan 04:44:41 -31.7 Dark Down 72.1 287.8 Up 04:41:30 - 04:47:52 -115
Goldendale 04:44:43 -31.7 Dark Down 72.2 289.4 Up 04:41:32 - 04:47:54 -120
Maupin 04:44:45 -31.9 Dark Down 72.2 291.3 Up 04:41:34 - 04:47:56 -139
Sisters 04:44:48 -32.0 Dark Down 72.1 293.9 Up 04:41:37 - 04:47:59 -155
Redmond 04:44:47 -32.3 Dark Down 71.9 293.9 Up 04:41:36 - 04:47:58 -183
Bend 04:44:48 -32.3 Dark Down 71.9 294.5 Up 04:41:37 - 04:47:59 -185
Oregon Observatory 04:44:49 -32.3 Dark Down 71.9 295.0 Up 04:41:38 - 04:48:00 -186
La Pine/Gilchrist 04:44:49 -32.4 Dark Down 71.8 295.6 Up 04:41:38 - 04:48:00 -193
Pasco 04:44:39 -32.5 Dark Down 71.2 288.2 Up 04:41:28 - 04:47:50 -201
PNWRO 04:44:40 -32.7 Dark Down 71.0 288.9 Up 04:41:29 - 04:47:51 -229
Chiloquin 04:44:53 -32.7 Dark Down 71.5 298.7 Up 04:41:42 - 04:48:04 -229
Klamath Falls 04:44:54 -32.9 Dark Down 71.3 299.5 Up 04:41:43 - 04:48:05 -253
North Lake 04:44:50 -33.0 Dark Down 71.2 296.6 Up 04:41:39 - 04:48:01 -257
Paisley 04:44:51 -33.5 Dark Down 70.8 297.9 Up 04:41:40 - 04:48:02 -311
Fall River/Burney 04:44:56 -33.7 Dark Down 70.5 302.3 Up 04:41:45 - 04:48:07 -341
Lakeview 04:44:52 -33.9 Dark Down 70.4 299.1 Up 04:41:41 - 04:48:03 -351
Cedarville 04:44:54 -34.3 Dark Down 69.9 300.6 Up 04:41:43 - 04:48:05 -398
Greenville 04:44:58 -34.5 Dark Down 69.7 304.1 Up 04:41:47 - 04:48:09 -419
Susanville 04:44:57 -34.5 Dark Down 69.6 303.4 Up 04:41:46 - 04:48:08 -425
Gimple 04:44:58 -34.5 Dark Down 69.6 304.1 Up 04:41:47 - 04:48:09 -425
Quincy 04:44:59 -34.6 Dark Down 69.6 304.6 Up 04:41:48 - 04:48:10 -430
Portola 04:44:59 -34.9 Dark Down 69.2 304.6 Up 04:41:48 - 04:48:10 -470
Reno 04:44:59 -35.5 Dark Down 68.6 304.9 Up 04:41:48 - 04:48:10 -529
Carson City 04:44:59 -35.7 Dark Down 68.4 305.6 Up 04:41:48 - 04:48:10 -549
Gardnerville 04:45:00 -35.8 Dark Down 68.2 306.1 Up 04:41:49 - 04:48:11 -566
Yerington 04:44:59 -36.2 Dark Down 67.9 305.7 Up 04:41:48 - 04:48:10 -604
Lee Vining 04:45:02 -36.7 Dark Down 67.2 307.6 Up 04:41:51 - 04:48:13 -661
Hawthorne 04:45:00 -36.8 Dark Down 67.3 306.3 Up 04:41:49 - 04:48:11 -665
CPSLO 04:45:11 -36.9 Dark Down 66.4 313.3 Up 04:42:00 - 04:48:22 -685
Bishop 04:45:03 -37.5 Dark Down 66.4 308.4 Up 04:41:52 - 04:48:14 -743
Tonopah 04:44:59 -38.0 Dark Down 66.1 306.5 Up 04:41:48 - 04:48:10 -787
Beatty 04:45:01 -38.9 Dark Down 65.1 308.4 Up 04:41:50 - 04:48:12 -881
Wildwood 04:45:11 -38.9 Dark Down 64.4 313.8 Up 04:42:00 - 04:48:22 -897
Indian Springs 04:45:01 -39.8 Dark Down 64.2 308.4 Up 04:41:50 - 04:48:12 -972
Henderson 04:45:01 -40.6 Dark Down 63.5 309.0 Up 04:41:50 - 04:48:12 -1048
Idyllwild 04:45:10 -40.5 Dark Down 63.0 313.2 Up 04:41:59 - 04:48:21 -1051
Laughlin/Bullhead City 04:45:03 -41.3 Dark Down 62.6 310.1 Up 04:41:52 - 04:48:14 -1123
Mohave Valley 04:45:03 -41.4 Dark Down 62.5 310.5 Up 04:41:52 - 04:48:14 -1138
Kingman/Dolan Springs 04:45:02 -41.7 Dark Down 62.3 309.8 Up 04:41:51 - 04:48:13 -1157
Patrick 04:45:01 -41.7 Dark Down 62.4 309.4 Up 04:41:50 - 04:48:12 -1158
Calipatria 04:45:09 -41.6 Dark Down 61.9 313.4 Up 04:41:58 - 04:48:20 -1166
Lake Havasu City 04:45:04 -41.8 Dark Down 62.0 311.0 Up 04:41:53 - 04:48:15 -1177
Parker 04:45:05 -42.0 Dark Down 61.8 311.4 Up 04:41:54 - 04:48:16 -1198
Blythe 04:45:07 -42.1 Dark Down 61.6 312.3 Up 04:41:56 - 04:48:18 -1205
Yuma 04:45:09 -42.5 Dark Down 61.0 313.6 Up 04:41:58 - 04:48:20 -1251
George/Scottsdale 04:45:02 -44.0 Dark Down 60.0 311.0 Up 04:41:51 - 04:48:13 -1385
Dunrhomin 04:44:36 -44.1 Dark Down 59.5 300.5 Up 04:41:25 - 04:47:47 -1387

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 342842, (2021/10/03 04:45UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 10.10 115
PPM 058957     19:52:07.1 +47:55:54  5.5  1.41 108
PPM 058728     19:42:49.9 +48:26:08  8.4  0.69 107
PPM 058836     19:47:01.0 +48:55:55  9.2  0.18 107
342842         19:45:55.8 +48:53:53 16.8       107
Positions are for J2000

Event circumstances last updated at 2021/09/12 01:25:39 UT

Marc W. Buie, Southwest Research Institute

RECON