RECON: TNO occultation with 05GF187

Event between 05GF187 and star GA0680:14567476 with event index number of 1191335

Geocentric closest approach at 2023/06/25 06:41:00 UTC

J2000 position of star is 17:36:27.2 -20:30:30
Equinox of date position of star is 17:37:50.5 -20:31:16
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 93 degrees from the moon. Moon is 40% 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 22.8 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 425 seconds.
The 1-sigma cross-track error in the shadow position is 1509 km.
The sky-plane scale is 20593.8 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, (2023/06/25 06:41UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.1 -26:28:55  0.9 16.46  78
35Eta Oph      17:11:43.6 -15:45:08  2.6  7.83  86
PPM 267109     17:40:09.6 -21:55:28  6.4  1.50  93
PPM 267087     17:39:14.6 -20:40:47  8.4  0.36  93
PPM 267055     17:37:32.8 -20:22:58  9.0  0.16  92
05GF187        17:37:51.1 -20:31:17 16.9        93
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 18.0 km RECON observability=0.8 and success probability=1.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:40:56 -14.3 AT Up 17.3 183.3 Really Low 06:25:56 - 06:55:56 4257
Kamloops 06:41:39 -13.7 AT Up 18.2 169.2 Really Low 06:26:39 - 06:56:39 4167
Kelowna 06:41:37 -14.7 AT Up 19.1 170.1 Really Low 06:26:37 - 06:56:37 4142
Peachland 06:41:38 -14.7 AT Up 19.1 169.8 Really Low 06:26:38 - 06:56:38 4136
Summerland 06:41:37 -14.9 AT Up 19.3 169.9 Really Low 06:26:37 - 06:56:37 4131
Penticton 06:41:37 -15.0 AT Up 19.4 170.0 Really Low 06:26:37 - 06:56:37 4129
Oliver 06:41:37 -15.3 AT Up 19.7 169.9 Really Low 06:26:37 - 06:56:37 4115
Anarchist Mountain Observatory 06:41:37 -15.5 AT Up 19.9 170.1 Really Low 06:26:37 - 06:56:37 4110
Okanogan 06:41:38 -16.1 AT Up 20.5 169.9 Low 06:26:38 - 06:56:38 4082
Brewster 06:41:39 -16.3 AT Up 20.8 169.6 Low 06:26:39 - 06:56:39 4070
Victoria 06:41:50 -15.0 AT Up 19.9 166.1 Really Low 06:26:50 - 06:56:50 4063
Manson/Chelan 06:41:40 -16.4 AT Up 20.9 169.3 Low 06:26:40 - 06:56:40 4059
Wenatchee 06:41:41 -16.8 AT Up 21.4 169.1 Low 06:26:41 - 06:56:41 4038
Ellensburg 06:41:42 -17.2 AT Up 21.8 168.8 Low 06:26:42 - 06:56:42 4019
Yakima 06:41:42 -17.5 AT Up 22.2 168.8 Low 06:26:42 - 06:56:42 4001
Toppenish/White Swan 06:41:42 -17.8 AT Up 22.4 168.9 Low 06:26:42 - 06:56:42 3992
PNWRO 06:41:37 -18.5 Dark Up 22.9 170.4 Low 06:26:37 - 06:56:37 3985
The Dalles 06:41:45 -18.3 Dark Up 23.0 168.1 Low 06:26:45 - 06:56:45 3952
Maupin 06:41:45 -18.7 Dark Up 23.5 168.1 Low 06:26:45 - 06:56:45 3933
Sisters 06:41:48 -19.4 Dark Up 24.3 167.6 Low 06:26:48 - 06:56:48 3889
Bend 06:41:47 -19.7 Dark Up 24.5 167.8 Low 06:26:47 - 06:56:47 3879
Oregon Observatory 06:41:47 -19.9 Dark Up 24.7 167.7 Low 06:26:47 - 06:56:47 3870
Chiloquin 06:41:50 -21.0 Dark Up 25.9 167.1 Low 06:26:50 - 06:56:50 3801
Klamath Falls 06:41:49 -21.3 Dark Up 26.2 167.2 Low 06:26:49 - 06:56:49 3784
Cedarville 06:41:44 -22.4 Dark Up 27.2 168.7 Low 06:26:44 - 06:56:44 3759
Dunrhomin 06:40:50 -26.1 Dark Up 29.1 184.4 Low 06:25:50 - 06:55:50 3739
Nikitin 06:40:50 -26.3 Dark Up 29.3 184.4 Low 06:25:50 - 06:55:50 3729
CU-SBO 06:40:50 -26.4 Dark Up 29.4 184.3 Low 06:25:50 - 06:55:50 3725
Fall River/Burney 06:41:49 -22.5 Dark Up 27.5 167.4 Low 06:26:49 - 06:56:49 3725
Gimple 06:41:47 -23.5 Dark Up 28.4 167.9 Low 06:26:47 - 06:56:47 3679
Greenville 06:41:47 -23.5 Dark Up 28.4 167.8 Low 06:26:47 - 06:56:47 3679
Quincy 06:41:48 -23.7 Dark Up 28.6 167.8 Low 06:26:48 - 06:56:48 3667
Portola 06:41:46 -23.9 Dark Up 28.8 168.2 Low 06:26:46 - 06:56:46 3664
Reno 06:41:44 -24.3 Dark Up 29.2 168.9 Low 06:26:44 - 06:56:44 3654
Carson City 06:41:44 -24.7 Dark Up 29.5 168.9 Low 06:26:44 - 06:56:44 3634
Yerington 06:41:42 -25.0 Dark Up 29.8 169.5 Low 06:26:42 - 06:56:42 3627
Gardnerville 06:41:44 -24.9 Dark Up 29.8 168.9 Low 06:26:44 - 06:56:44 3620
Hawthorne 06:41:40 -25.6 Dark Up 30.3 170.0 Up 06:26:40 - 06:56:40 3604
Lee Vining 06:41:42 -26.0 Dark Up 30.8 169.5 Up 06:26:42 - 06:56:42 3568
Bishop 06:41:40 -26.8 Dark Up 31.5 170.2 Up 06:26:40 - 06:56:40 3537
Beatty 06:41:34 -27.6 Dark Up 32.2 171.9 Up 06:26:34 - 06:56:34 3519
Patrick 06:41:23 -29.7 Dark Up 33.9 174.9 Up 06:26:23 - 06:56:23 3442
Laughlin/Bullhead City 06:41:26 -29.8 Dark Up 34.1 174.1 Up 06:26:26 - 06:56:26 3423
Lake Havasu City 06:41:25 -30.5 Dark Up 34.8 174.4 Up 06:26:25 - 06:56:25 3381
George/Scottsdale 06:41:16 -31.7 Dark Up 35.7 177.1 Up 06:26:16 - 06:56:16 3341
Wildwood 06:41:42 -29.8 Dark Up 34.7 169.6 Up 06:26:42 - 06:56:42 3332
Idyllwild 06:41:34 -30.6 Dark Up 35.3 171.6 Up 06:26:34 - 06:56:34 3321
Calipatria 06:41:30 -31.5 Dark Up 36.1 172.9 Up 06:26:30 - 06:56:30 3287
Yuma 06:41:26 -32.1 Dark Up 36.6 173.9 Up 06:26:26 - 06:56:26 3262

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, (2023/06/25 06:41UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.46  78
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.83  86
PPM 267109     17:38:44.8 -21:54:46  6.4  1.50  93
PPM 267087     17:37:50.6 -20:40:03  8.4  0.36  93
PPM 267055     17:36:09.0 -20:22:11  9.0  0.16  92
05GF187        17:36:27.2 -20:30:30 16.9        92
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:28:01 UT

Marc W. Buie, Southwest Research Institute

RECON