RECON: TNO occultation with 552678

Event between (552678) 10JG210 and star GA0780:17980037 with event index number of 2224767

Geocentric closest approach at 2027/08/20 07:42:01 UTC

J2000 position of star is 19:01:25.0 -10:30:17
Equinox of date position of star is 19:02:38.1 -10:28:19
Stellar brightness G=14.1, 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 92% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 17.4 AU from the Sun and 16.6 AU from the Earth.
The TNO is moving 16.0 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 185 seconds.
The 1-sigma cross-track error in the shadow position is 2029 km.
The sky-plane scale is 12065.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.3 km assuming a 5% albedo -- 7.1 sec chord
Diameter=46.7 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 552678, (2027/08/20 07:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.4 -26:29:27  0.9 39.20 111
Nunki          18:56:58.6 -26:15:35  2.0 15.86  78
PPM 235666     19:14:48.2 -12:14:02  5.2  3.40  72
PPM 235404     19:04:05.9 -10:40:47  7.2  0.36  74
PPM 235375     19:03:07.7 -10:39:46  9.3  0.20  74
552678         19:02:56.5 -10:27:48 14.1        74
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 4.9 sigma about the mid-time.
The median site spacing is 26.1 km RECON observability=1.0 and success probability=24.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 07:36:45 -26.5 Dark Up 20.9 219.2 Low 07:21:45 - 07:51:45 1225
Victoria 07:36:52 -28.3 Dark Up 23.8 216.8 Low 07:21:52 - 07:51:52 1182
Peachland 07:36:43 -27.5 Dark Up 21.4 220.0 Low 07:21:43 - 07:51:43 1131
Kelowna 07:36:42 -27.4 Dark Up 21.2 220.2 Low 07:21:42 - 07:51:42 1128
Summerland 07:36:43 -27.7 Dark Up 21.5 220.1 Low 07:21:43 - 07:51:43 1116
Penticton 07:36:42 -27.7 Dark Up 21.5 220.2 Low 07:21:42 - 07:51:42 1106
Oliver 07:36:42 -28.1 Dark Up 21.8 220.3 Low 07:21:42 - 07:51:42 1079
Anarchist Mountain Observatory 07:36:41 -28.3 Dark Up 21.8 220.6 Low 07:21:41 - 07:51:41 1058
Tonasket 07:36:42 -28.6 Dark Up 22.1 220.6 Low 07:21:42 - 07:51:42 1037
Okanogan 07:36:42 -28.9 Dark Up 22.4 220.5 Low 07:21:42 - 07:51:42 1016
Brewster 07:36:42 -29.1 Dark Up 22.7 220.4 Low 07:21:42 - 07:51:42 1003
Manson/Chelan 07:36:43 -29.3 Dark Up 23.0 220.1 Low 07:21:43 - 07:51:43 1001
Wenatchee 07:36:43 -29.8 Dark Up 23.4 220.1 Low 07:21:43 - 07:51:43 971
Ellensburg 07:36:44 -30.2 Dark Up 23.9 220.0 Low 07:21:44 - 07:51:44 948
Yakima 07:36:44 -30.6 Dark Up 24.2 220.1 Low 07:21:44 - 07:51:44 916
Toppenish/White Swan 07:36:44 -30.8 Dark Up 24.3 220.3 Low 07:21:44 - 07:51:44 892
Goldendale 07:36:44 -31.3 Dark Up 24.9 220.1 Low 07:21:44 - 07:51:44 866
The Dalles 07:36:45 -31.5 Dark Up 25.2 219.8 Low 07:21:45 - 07:51:45 863
Sleaford 07:36:14 -25.1 Dark Up 13.6 232.0 Really Low 07:21:14 - 07:51:14 827
Maupin 07:36:45 -31.9 Dark Up 25.5 220.0 Low 07:21:45 - 07:51:45 825
PNWRO 07:36:39 -31.3 Dark Up 23.9 221.8 Low 07:21:39 - 07:51:39 800
Sisters 07:36:47 -32.7 Dark Up 26.4 219.8 Low 07:21:47 - 07:51:47 776
Bend 07:36:46 -33.0 Dark Up 26.4 220.1 Low 07:21:46 - 07:51:46 746
Oregon Observatory 07:36:46 -33.1 Dark Up 26.6 220.1 Low 07:21:46 - 07:51:46 738
North Lake 07:36:44 -33.8 Dark Up 26.9 220.8 Low 07:21:44 - 07:51:44 662
Chiloquin 07:36:48 -34.4 Dark Up 27.8 220.1 Low 07:21:48 - 07:51:48 649
Klamath Falls 07:36:47 -34.7 Dark Up 28.1 220.3 Low 07:21:47 - 07:51:47 617
Lakeview 07:36:43 -34.9 Dark Up 27.4 221.7 Low 07:21:43 - 07:51:43 550
Fall River/Burney 07:36:46 -36.0 Dark Up 28.8 221.1 Low 07:21:46 - 07:51:46 503
Cedarville 07:36:43 -35.6 Dark Up 27.8 222.1 Low 07:21:43 - 07:51:43 488
Susanville 07:36:44 -36.7 Dark Up 28.9 222.0 Low 07:21:44 - 07:51:44 416
Greenville 07:36:45 -36.9 Dark Up 29.2 221.8 Low 07:21:45 - 07:51:45 406
Gimple 07:36:45 -36.9 Dark Up 29.2 221.9 Low 07:21:45 - 07:51:45 402
Quincy 07:36:45 -37.1 Dark Up 29.4 221.9 Low 07:21:45 - 07:51:45 389
Portola 07:36:44 -37.3 Dark Up 29.2 222.4 Low 07:21:44 - 07:51:44 357
Reno 07:36:42 -37.6 Dark Up 29.1 223.1 Low 07:21:42 - 07:51:42 304
Carson City 07:36:42 -38.0 Dark Up 29.3 223.3 Low 07:21:42 - 07:51:42 272
Gardnerville 07:36:42 -38.2 Dark Up 29.5 223.4 Low 07:21:42 - 07:51:42 249
Yerington 07:36:40 -38.2 Dark Up 29.1 224.0 Low 07:21:40 - 07:51:40 226
Hawthorne 07:36:39 -38.7 Dark Up 29.2 224.6 Low 07:21:39 - 07:51:39 162
Lee Vining 07:36:40 -39.3 Dark Up 29.9 224.4 Low 07:21:40 - 07:51:40 136
Tonopah 07:36:34 -39.3 Dark Up 28.7 226.1 Low 07:21:34 - 07:51:34 55
Bishop 07:36:38 -39.9 Dark Up 29.9 225.3 Low 07:21:38 - 07:51:38 49
Beatty 07:36:34 -40.5 Dark Up 29.3 227.0 Low 07:21:34 - 07:51:34 -68
Indian Springs 07:36:30 -40.9 Dark Up 28.9 228.1 Low 07:21:30 - 07:51:30 -148
Henderson 07:36:29 -41.5 Dark Up 28.8 228.9 Low 07:21:29 - 07:51:29 -228
Wildwood 07:36:41 -43.2 Dark Up 32.3 226.6 Up 07:21:41 - 07:51:41 -230
Dunrhomin 07:36:02 -36.7 Dark Up 20.2 235.5 Low 07:21:02 - 07:51:02 -265
Laughlin/Bullhead City 07:36:28 -42.3 Dark Up 29.1 229.6 Low 07:21:28 - 07:51:28 -326
Patrick 07:36:25 -42.1 Dark Up 28.5 230.1 Low 07:21:25 - 07:51:25 -337
Kingman/Dolan Springs 07:36:26 -42.3 Dark Up 28.8 230.1 Low 07:21:26 - 07:51:26 -349
Mohave Valley 07:36:28 -42.6 Dark Up 29.3 229.8 Low 07:21:28 - 07:51:28 -352
Idyllwild 07:36:35 -43.7 Dark Up 31.4 228.4 Up 07:21:35 - 07:51:35 -354
Lake Havasu City 07:36:27 -43.0 Dark Up 29.4 230.1 Low 07:21:27 - 07:51:27 -400
Parker 07:36:28 -43.4 Dark Up 29.6 230.3 Low 07:21:28 - 07:51:28 -433
Calipatria 07:36:32 -44.3 Dark Up 31.0 229.7 Up 07:21:32 - 07:51:32 -467
Yuma 07:36:30 -44.8 Dark Up 30.7 230.7 Up 07:21:30 - 07:51:30 -550
George/Scottsdale 07:36:21 -43.8 Dark Up 28.3 232.5 Low 07:21:21 - 07:51:21 -587

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 552678, (2027/08/20 07:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 39.20 111
Nunki          18:55:15.9 -26:17:49  2.0 15.86  78
PPM 235666     19:13:15.6 -12:16:58  5.2  3.40  72
PPM 235404     19:02:34.2 -10:43:18  7.2  0.36  74
PPM 235375     19:01:36.0 -10:42:15  9.3  0.20  74
552678         19:01:25.0 -10:30:17 14.1        74
Positions are for J2000

Event circumstances last updated at 2022/01/28 00:17:06 UT

Marc W. Buie, Southwest Research Institute

RECON