RECON: TNO occultation with 05GF187

Event between 05GF187 and star GA0680:14886313 with event index number of 1191317

Geocentric closest approach at 2023/06/17 05:18:26 UTC

J2000 position of star is 17:37:22.7 -20:30:47
Equinox of date position of star is 17:38:46.0 -20:31:31
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 168 degrees from the moon. Moon is 1% 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 23.2 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 423 seconds.
The 1-sigma cross-track error in the shadow position is 1572 km.
The sky-plane scale is 20586.0 km/arcsec.

The object has an absolute magnitude Hv=8.1
Diameter=142.6 km assuming a 5% albedo -- 6.1 sec chord
Diameter=58.2 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 05GF187, (2023/06/17 05:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.0 -26:28:55  0.9 16.65 175
35Eta Oph      17:11:43.5 -15:45:08  2.6  8.00 169
PPM 267109     17:40:09.5 -21:55:28  6.4  1.44 168
PPM 267087     17:39:14.5 -20:40:47  8.4  0.19 168
PPM 267097     17:39:32.7 -20:34:05  9.4  0.18 168
05GF187        17:38:46.5 -20:31:32 16.9       168
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 14.4 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)
Sleaford 05:19:35 -11.1 NT Down 14.2 155.8 Really Low 05:04:35 - 05:34:35 10192
Kamloops 05:20:22 -7.8 NT Down 10.8 142.8 Really Low 05:05:22 - 05:35:22 9926
Kelowna 05:20:22 -8.8 NT Down 11.8 143.4 Really Low 05:05:22 - 05:35:22 9905
Peachland 05:20:23 -8.8 NT Down 11.8 143.2 Really Low 05:05:23 - 05:35:23 9895
Summerland 05:20:23 -8.9 NT Down 11.9 143.2 Really Low 05:05:23 - 05:35:23 9890
Penticton 05:20:22 -9.0 NT Down 12.0 143.3 Really Low 05:05:22 - 05:35:22 9888
Oliver 05:20:24 -9.3 NT Down 12.3 143.3 Really Low 05:05:24 - 05:35:24 9872
Anarchist Mountain Observatory 05:20:24 -9.5 NT Down 12.5 143.4 Really Low 05:05:24 - 05:35:24 9868
Okanogan 05:20:25 -10.0 NT Down 13.0 143.1 Really Low 05:05:25 - 05:35:25 9833
Brewster 05:20:26 -10.1 NT Down 13.1 142.9 Really Low 05:05:26 - 05:35:26 9817
Manson/Chelan 05:20:28 -10.1 NT Down 13.1 142.6 Really Low 05:05:28 - 05:35:28 9800
Wenatchee 05:20:29 -10.4 NT Down 13.4 142.4 Really Low 05:05:29 - 05:35:29 9774
Victoria 05:20:35 -8.3 NT Down 11.3 139.9 Really Low 05:05:35 - 05:35:35 9771
Ellensburg 05:20:31 -10.7 NT Down 13.7 142.1 Really Low 05:05:31 - 05:35:31 9749
PNWRO 05:20:28 -12.1 AT Down 15.1 143.4 Really Low 05:05:28 - 05:35:28 9729
Yakima 05:20:32 -11.0 NT Down 14.0 142.1 Really Low 05:05:32 - 05:35:32 9728
Toppenish/White Swan 05:20:32 -11.2 NT Down 14.2 142.2 Really Low 05:05:32 - 05:35:32 9720
The Dalles 05:20:35 -11.5 NT Down 14.5 141.4 Really Low 05:05:35 - 05:35:35 9665
Maupin 05:20:36 -11.9 NT Down 14.9 141.4 Really Low 05:05:36 - 05:35:36 9645
Dunrhomin 05:19:58 -22.1 Dark Down 25.2 154.8 Low 05:04:58 - 05:34:58 9642
Nikitin 05:19:58 -22.3 Dark Down 25.3 154.7 Low 05:04:58 - 05:34:58 9631
CU-SBO 05:19:58 -22.3 Dark Down 25.3 154.7 Low 05:04:58 - 05:34:58 9626
Sisters 05:20:39 -12.4 AT Down 15.3 140.9 Really Low 05:05:39 - 05:35:39 9588
Bend 05:20:38 -12.7 AT Down 15.6 141.0 Really Low 05:05:38 - 05:35:38 9581
Oregon Observatory 05:20:40 -12.7 AT Down 15.7 140.9 Really Low 05:05:40 - 05:35:40 9568
Chiloquin 05:20:43 -13.6 AT Down 16.6 140.3 Really Low 05:05:43 - 05:35:43 9486
Klamath Falls 05:20:44 -13.9 AT Down 16.9 140.3 Really Low 05:05:44 - 05:35:44 9467
Cedarville 05:20:41 -15.2 AT Down 18.2 141.5 Really Low 05:05:41 - 05:35:41 9459
Fall River/Burney 05:20:46 -15.0 AT Down 18.0 140.4 Really Low 05:05:46 - 05:35:46 9405
Gimple 05:20:46 -16.0 AT Down 18.9 140.7 Really Low 05:05:46 - 05:35:46 9361
Greenville 05:20:45 -15.9 AT Down 18.9 140.6 Really Low 05:05:45 - 05:35:45 9360
Portola 05:20:45 -16.4 AT Down 19.4 140.9 Really Low 05:05:45 - 05:35:45 9350
Quincy 05:20:46 -16.1 AT Down 19.0 140.6 Really Low 05:05:46 - 05:35:46 9347
Reno 05:20:43 -16.9 AT Down 19.9 141.4 Really Low 05:05:43 - 05:35:43 9346
Yerington 05:20:43 -17.7 AT Down 20.6 141.9 Low 05:05:43 - 05:35:43 9325
Carson City 05:20:44 -17.2 AT Down 20.2 141.4 Low 05:05:44 - 05:35:44 9325
Gardnerville 05:20:45 -17.4 AT Down 20.4 141.3 Low 05:05:45 - 05:35:45 9310
Hawthorne 05:20:42 -18.3 Dark Down 21.2 142.2 Low 05:05:42 - 05:35:42 9307
Lee Vining 05:20:44 -18.5 Dark Down 21.5 141.6 Low 05:05:44 - 05:35:44 9261
Beatty 05:20:39 -20.5 Dark Down 23.4 143.4 Low 05:05:39 - 05:35:39 9240
Bishop 05:20:43 -19.3 Dark Down 22.3 142.1 Low 05:05:43 - 05:35:43 9237
Patrick 05:20:33 -23.0 Dark Down 26.0 145.6 Low 05:05:33 - 05:35:33 9198
Laughlin/Bullhead City 05:20:35 -22.9 Dark Down 25.9 144.9 Low 05:05:35 - 05:35:35 9168
Lake Havasu City 05:20:35 -23.6 Dark Down 26.5 144.9 Low 05:05:35 - 05:35:35 9127
George/Scottsdale 05:20:28 -25.3 Dark Down 28.3 146.9 Low 05:05:28 - 05:35:28 9121
Idyllwild 05:20:43 -23.0 Dark Down 26.0 142.6 Low 05:05:43 - 05:35:43 9028
Wildwood 05:20:49 -21.8 Dark Down 24.8 141.1 Low 05:05:49 - 05:35:49 9013
Calipatria 05:20:42 -24.1 Dark Down 27.1 143.5 Low 05:05:42 - 05:35:42 9008
Yuma 05:20:38 -24.9 Dark Down 27.9 144.1 Low 05:05:38 - 05:35:38 8996

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, (2023/06/17 05:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.65 175
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.00 169
PPM 267109     17:38:44.8 -21:54:46  6.4  1.44 168
PPM 267087     17:37:50.6 -20:40:03  8.4  0.19 168
PPM 267097     17:38:08.8 -20:33:21  9.4  0.18 168
05GF187        17:37:22.7 -20:30:47 16.9       168
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:27:32 UT

Marc W. Buie, Southwest Research Institute

RECON