RECON: TNO occultation with 05GF187

Event between 05GF187 and star GA0680:15234381 with event index number of 1191296

Geocentric closest approach at 2023/06/08 06:58:44 UTC

J2000 position of star is 17:38:24.3 -20:31:13
Equinox of date position of star is 17:39:47.5 -20:31:56
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 49 degrees from the moon. Moon is 78% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 29.4 AU from the Sun and 28.4 AU from the Earth.
Apparent velocity is 22.9 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 430 seconds.
The 1-sigma cross-track error in the shadow position is 2194 km.
The sky-plane scale is 20593.6 km/arcsec.

The object has an absolute magnitude Hv=8.1
Diameter=142.6 km assuming a 5% albedo -- 6.2 sec chord
Diameter=58.2 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 05GF187, (2023/06/08 06:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.9 -26:28:55  0.9 16.87  64
35Eta Oph      17:11:43.4 -15:45:08  2.6  8.20  57
PPM 267109     17:40:09.4 -21:55:28  6.4  1.39  49
PPM 267087     17:39:14.4 -20:40:47  8.4  0.20  49
PPM 267097     17:39:32.6 -20:34:05  9.4  0.07  49
05GF187        17:39:48.0 -20:31:56 14.6        49
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 2.1 sigma about the mid-time.
The median site spacing is 18.2 km RECON observability=0.7 and success probability=10.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:59:53 -15.3 AT Down 15.8 157.1 Really Low 06:44:53 - 07:14:53 241
Sleaford 06:59:21 -15.1 AT Down 16.9 170.9 Really Low 06:44:21 - 07:14:21 237
Oliver 06:59:53 -16.9 AT Down 17.4 157.7 Really Low 06:44:53 - 07:14:53 231
Peachland 06:59:53 -16.3 AT Down 16.8 157.5 Really Low 06:44:53 - 07:14:53 228
Summerland 06:59:53 -16.4 AT Down 17.0 157.6 Really Low 06:44:53 - 07:14:53 226
Anarchist Mountain Observatory 06:59:53 -17.1 AT Down 17.6 157.8 Really Low 06:44:53 - 07:14:53 223
Penticton 06:59:53 -16.5 AT Down 17.1 157.7 Really Low 06:44:53 - 07:14:53 220
Kelowna 06:59:53 -16.2 AT Down 16.8 157.8 Really Low 06:44:53 - 07:14:53 206
Okanogan 07:00:05 -17.7 AT Down 18.2 157.6 Really Low 06:45:05 - 07:15:05 -31
Brewster 07:00:05 -17.9 AT Down 18.4 157.4 Really Low 06:45:05 - 07:15:05 -45
Manson/Chelan 07:00:07 -18.0 Dark Down 18.5 157.0 Really Low 06:45:07 - 07:15:07 -59
Victoria 07:00:15 -16.8 AT Down 17.0 154.0 Really Low 06:45:15 - 07:15:15 -73
Wenatchee 07:00:08 -18.5 Dark Down 18.9 156.8 Really Low 06:45:08 - 07:15:08 -82
Ellensburg 07:00:09 -18.8 Dark Down 19.2 156.5 Really Low 06:45:09 - 07:15:09 -104
Yakima 07:00:10 -19.2 Dark Down 19.5 156.4 Really Low 06:45:10 - 07:15:10 -123
PNWRO 07:00:05 -20.1 Dark Down 20.5 157.9 Low 06:45:05 - 07:15:05 -129
Toppenish/White Swan 07:00:10 -19.5 Dark Down 19.8 156.6 Really Low 06:45:10 - 07:15:10 -131
The Dalles 07:00:13 -20.1 Dark Down 20.3 155.7 Low 06:45:13 - 07:15:13 -178
Maupin 07:00:13 -20.5 Dark Down 20.7 155.8 Low 06:45:13 - 07:15:13 -197
Sisters 07:00:16 -21.2 Dark Down 21.4 155.2 Low 06:45:16 - 07:15:16 -247
Bend 07:00:16 -21.5 Dark Down 21.7 155.4 Low 06:45:16 - 07:15:16 -256
Oregon Observatory 07:00:16 -21.7 Dark Down 21.8 155.2 Low 06:45:16 - 07:15:16 -266
Dunrhomin 06:59:24 -26.9 Dark Up 28.7 170.9 Low 06:44:24 - 07:14:24 -285
Nikitin 06:59:24 -27.1 Dark Up 28.9 170.9 Low 06:44:24 - 07:14:24 -295
CU-SBO 06:59:25 -27.2 Dark Up 28.9 170.8 Low 06:44:25 - 07:14:25 -299
Chiloquin 07:00:19 -22.8 Dark Down 22.8 154.6 Low 06:45:19 - 07:15:19 -342
Klamath Falls 07:00:20 -23.2 Dark Down 23.2 154.6 Low 06:45:20 - 07:15:20 -359
Cedarville 07:00:15 -24.2 Dark Down 24.3 156.0 Low 06:45:15 - 07:15:15 -374
Fall River/Burney 07:00:20 -24.4 Dark Down 24.4 154.8 Low 06:45:20 - 07:15:20 -419
Gimple 07:00:19 -25.4 Dark Down 25.4 155.1 Low 06:45:19 - 07:15:19 -462
Greenville 07:00:19 -25.4 Dark Down 25.3 155.0 Low 06:45:19 - 07:15:19 -463
Portola 07:00:18 -25.8 Dark Down 25.8 155.4 Low 06:45:18 - 07:15:18 -475
Quincy 07:00:20 -25.6 Dark Down 25.5 155.0 Low 06:45:20 - 07:15:20 -475
Reno 07:00:16 -26.2 Dark Down 26.2 156.0 Low 06:45:16 - 07:15:16 -481
Carson City 07:00:17 -26.5 Dark Down 26.6 155.9 Low 06:45:17 - 07:15:17 -502
Yerington 07:00:15 -26.8 Dark Down 26.9 156.5 Low 06:45:15 - 07:15:15 -504
Gardnerville 07:00:17 -26.8 Dark Down 26.8 155.9 Low 06:45:17 - 07:15:17 -516
Hawthorne 07:00:13 -27.4 Dark Down 27.5 156.9 Low 06:45:13 - 07:15:13 -525
Lee Vining 07:00:16 -27.8 Dark Down 27.9 156.3 Low 06:45:16 - 07:15:16 -565
Bishop 07:00:14 -28.6 Dark Down 28.7 156.9 Low 06:45:14 - 07:15:14 -592
Beatty 07:00:08 -29.3 Dark Down 29.6 158.5 Low 06:45:08 - 07:15:08 -598
Patrick 06:59:53 -31.2 Dark Up 31.8 161.1 Up 06:44:53 - 07:14:53 -668
Laughlin/Bullhead City 06:59:53 -31.3 Dark Up 31.8 160.3 Up 06:44:53 - 07:14:53 -708
George/Scottsdale 06:59:53 -33.1 Dark Up 33.9 162.9 Up 06:44:53 - 07:14:53 -742
Lake Havasu City 06:59:53 -32.0 Dark Up 32.5 160.4 Up 06:44:53 - 07:14:53 -744
Idyllwild 07:00:11 -32.4 Dark Up 32.5 157.8 Up 06:45:11 - 07:15:11 -801
Wildwood 07:00:18 -31.7 Dark Down 31.6 156.0 Up 06:45:18 - 07:15:18 -804
Calipatria 07:00:07 -33.2 Dark Up 33.5 158.9 Up 06:45:07 - 07:15:07 -827
Yuma 06:59:53 -33.8 Dark Up 34.1 159.7 Up 06:44:53 - 07:14:53 -879

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 05GF187, (2023/06/08 06:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.87  64
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.20  57
PPM 267109     17:38:44.8 -21:54:46  6.4  1.39  49
PPM 267087     17:37:50.6 -20:40:03  8.4  0.20  49
PPM 267097     17:38:08.8 -20:33:21  9.4  0.07  49
05GF187        17:38:24.3 -20:31:13 14.6        49
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:26:57 UT

Marc W. Buie, Southwest Research Institute

RECON