RECON: TNO occultation with 278361

Event between (278361) 07JJ43 and star GA0640:11692234 with event index number of 2180925

Geocentric closest approach at 2022/06/01 10:19:35 UTC

J2000 position of star is 17:10:16.0 -25:58:24
Equinox of date position of star is 17:11:38.4 -25:59:58
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 167 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=20.6

[RECON map]
TNO is 40.7 AU from the Sun and 39.7 AU from the Earth.
The TNO is moving 24.2 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 340 seconds.
The 1-sigma cross-track error in the shadow position is 1709 km.
The sky-plane scale is 28825.9 km/arcsec.

The TNO has an absolute magnitude Hv=4.5
Diameter=758.6 km assuming a 5% albedo -- 31.4 sec chord
Diameter=309.7 km assuming a 30% albedo -- 12.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 278361, (2022/06/01 10:20UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.1 -26:28:47  0.9  9.17 158
23Tau Sco      16:37:16.9 -28:15:38  2.8  7.97 159
PPM 266416     17:08:16.7 -26:32:29  6.3  0.93 166
PPM 266507     17:11:55.9 -26:16:18  8.3  0.28 167
PPM 266475     17:10:39.7 -26:05:47  9.5  0.24 166
278361         17:11:39.2 -25:59:59 14.2       167
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 2.6 sigma about the mid-time.
The median site spacing is 22.0 km RECON observability=0.4 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)
Kamloops 10:18:50 -11.0 NT Down 9.8 204.2 Really Low 10:03:50 - 10:33:50 10656
Kelowna 10:18:47 -11.4 NT Down 10.3 205.0 Really Low 10:03:47 - 10:33:47 10629
Peachland 10:18:47 -11.6 NT Down 10.5 204.8 Really Low 10:03:47 - 10:33:47 10628
Summerland 10:18:47 -11.7 NT Down 10.6 204.8 Really Low 10:03:47 - 10:33:47 10623
Penticton 10:18:46 -11.7 NT Down 10.6 204.9 Really Low 10:03:46 - 10:33:46 10621
Victoria 10:18:55 -13.9 AT Down 12.6 201.7 Really Low 10:03:55 - 10:33:55 10615
Oliver 10:18:46 -12.0 NT Down 11.0 205.0 Really Low 10:03:46 - 10:33:46 10611
Anarchist Mountain Observatory 10:18:45 -12.1 AT Down 11.1 205.2 Really Low 10:03:45 - 10:33:45 10606
Tonasket 10:18:45 -12.3 AT Down 11.4 205.1 Really Low 10:03:45 - 10:33:45 10597
Okanogan 10:18:45 -12.7 AT Down 11.7 205.0 Really Low 10:03:45 - 10:33:45 10588
Brewster 10:18:45 -13.0 AT Down 12.0 204.9 Really Low 10:03:45 - 10:33:45 10581
Manson/Chelan 10:18:45 -13.3 AT Down 12.3 204.6 Really Low 10:03:45 - 10:33:45 10578
Wenatchee 10:18:45 -13.7 AT Down 12.8 204.5 Really Low 10:03:45 - 10:33:45 10564
Ellensburg 10:18:45 -14.2 AT Down 13.2 204.3 Really Low 10:03:45 - 10:33:45 10553
Sleaford 10:18:19 -4.3 CT Down 4.1 216.2 Really Low 10:03:19 - 10:33:19 10549
Yakima 10:18:44 -14.5 AT Down 13.6 204.3 Really Low 10:03:44 - 10:33:44 10540
Toppenish/White Swan 10:18:43 -14.6 AT Down 13.7 204.5 Really Low 10:03:43 - 10:33:43 10532
Goldendale 10:18:44 -15.3 AT Down 14.4 204.2 Really Low 10:03:44 - 10:33:44 10516
The Dalles 10:18:44 -15.6 AT Down 14.7 203.9 Really Low 10:03:44 - 10:33:44 10511
PNWRO 10:18:40 -14.4 AT Down 13.6 205.8 Really Low 10:03:40 - 10:33:40 10509
Maupin 10:18:45 -15.9 AT Down 15.0 204.0 Really Low 10:03:45 - 10:33:45 10496
Sisters 10:18:44 -16.8 AT Down 16.0 203.7 Really Low 10:03:44 - 10:33:44 10468
Bend 10:18:42 -16.9 AT Down 16.1 203.9 Really Low 10:03:42 - 10:33:42 10458
Oregon Observatory 10:18:43 -17.1 AT Down 16.3 203.8 Really Low 10:03:43 - 10:33:43 10452
North Lake 10:18:40 -17.5 AT Down 16.7 204.4 Really Low 10:03:40 - 10:33:40 10424
Chiloquin 10:18:43 -18.4 Dark Down 17.6 203.6 Really Low 10:03:43 - 10:33:43 10404
Klamath Falls 10:18:41 -18.7 Dark Down 17.9 203.7 Really Low 10:03:41 - 10:33:41 10390
Lakeview 10:18:37 -18.1 Dark Down 17.5 205.0 Really Low 10:03:37 - 10:33:37 10379
Cedarville 10:18:35 -18.6 Dark Down 18.1 205.2 Really Low 10:03:35 - 10:33:35 10350
Fall River/Burney 10:18:38 -19.5 Dark Down 18.9 204.2 Really Low 10:03:38 - 10:33:38 10338
Susanville 10:18:35 -19.7 Dark Down 19.2 205.0 Really Low 10:03:35 - 10:33:35 10306
Greenville 10:18:35 -20.1 Dark Down 19.6 204.7 Really Low 10:03:35 - 10:33:35 10296
Gimple 10:18:36 -20.0 Dark Down 19.6 204.8 Really Low 10:03:36 - 10:33:36 10295
Quincy 10:18:36 -20.2 Dark Down 19.8 204.8 Really Low 10:03:36 - 10:33:36 10287
Portola 10:18:33 -20.1 Dark Down 19.7 205.2 Really Low 10:03:33 - 10:33:33 10278
Reno 10:18:31 -20.1 Dark Down 19.8 205.8 Really Low 10:03:31 - 10:33:31 10261
Carson City 10:18:30 -20.4 Dark Down 20.1 205.9 Low 10:03:30 - 10:33:30 10245
Gardnerville 10:18:30 -20.6 Dark Down 20.3 206.0 Low 10:03:30 - 10:33:30 10233
Yerington 10:18:29 -20.3 Dark Down 20.0 206.5 Low 10:03:29 - 10:33:29 10231
Hawthorne 10:18:26 -20.4 Dark Down 20.3 207.0 Low 10:03:26 - 10:33:26 10204
Lee Vining 10:18:27 -21.1 Dark Down 20.9 206.7 Low 10:03:27 - 10:33:27 10182
Tonopah 10:18:21 -20.1 Dark Down 20.2 208.3 Low 10:03:21 - 10:33:21 10169
Bishop 10:18:23 -21.2 Dark Down 21.2 207.4 Low 10:03:23 - 10:33:23 10146
Dunrhomin 10:17:49 -12.3 AT Down 13.3 217.8 Really Low 10:02:49 - 10:32:49 10111
Beatty 10:18:17 -20.8 Dark Down 21.0 208.9 Low 10:03:17 - 10:33:17 10107
CU-SBO 10:17:49 -12.5 AT Down 13.5 217.8 Really Low 10:02:49 - 10:32:49 10101
Indian Springs 10:18:14 -20.5 Dark Down 20.9 209.9 Low 10:03:14 - 10:33:14 10079
Henderson 10:18:11 -20.6 Dark Down 21.1 210.6 Low 10:03:11 - 10:33:11 10044
Patrick 10:18:06 -20.5 Dark Down 21.2 211.7 Low 10:03:06 - 10:33:06 9998
Laughlin/Bullhead City 10:18:08 -21.1 Dark Down 21.7 211.1 Low 10:03:08 - 10:33:08 9993
Kingman/Dolan Springs 10:18:06 -20.8 Dark Down 21.4 211.5 Low 10:03:06 - 10:33:06 9988
Mohave Valley 10:18:07 -21.3 Dark Down 21.9 211.2 Low 10:03:07 - 10:33:07 9978
Wildwood 10:18:19 -24.0 Dark Down 24.2 207.9 Low 10:03:19 - 10:33:19 9978
Lake Havasu City 10:18:06 -21.5 Dark Down 22.1 211.5 Low 10:03:06 - 10:33:06 9953
Idyllwild 10:18:12 -23.3 Dark Down 23.8 209.6 Low 10:03:12 - 10:33:12 9940
Parker 10:18:05 -21.7 Dark Down 22.4 211.6 Low 10:03:05 - 10:33:05 9934
Calipatria 10:18:08 -23.1 Dark Down 23.8 210.7 Low 10:03:08 - 10:33:08 9891
George/Scottsdale 10:17:57 -20.7 Dark Down 21.7 213.7 Low 10:02:57 - 10:32:57 9878
Yuma 10:18:04 -23.0 Dark Down 23.8 211.6 Low 10:03:04 - 10:33:04 9856

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 278361, (2022/06/01 10:20UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.17 158
23Tau Sco      16:35:52.9 -28:12:58  2.8  7.97 159
PPM 266416     17:06:53.2 -26:30:47  6.3  0.93 166
PPM 266507     17:10:32.5 -26:14:44  8.3  0.28 167
PPM 266475     17:09:16.4 -26:04:10  9.5  0.24 166
278361         17:10:16.0 -25:58:24 14.2       167
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:03:38 UT

Marc W. Buie, Southwest Research Institute

RECON