RECON: TNO occultation with 05GF187

Event between 05GF187 and star GA0680:15191649 with event index number of 1191301

Geocentric closest approach at 2023/06/09 09:04:09 UTC

J2000 position of star is 17:38:16.9 -20:31:09
Equinox of date position of star is 17:39:40.1 -20:31:52
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon. Moon is 66% 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 23.0 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 434 seconds.
The 1-sigma cross-track error in the shadow position is 1404 km.
The sky-plane scale is 20591.8 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, (2023/06/09 09:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.9 -26:28:55  0.9 16.84  79
35Eta Oph      17:11:43.4 -15:45:08  2.6  8.18  72
PPM 267109     17:40:09.4 -21:55:28  6.4  1.40  64
PPM 267087     17:39:14.5 -20:40:47  8.4  0.18  65
PPM 267097     17:39:32.6 -20:34:05  9.4  0.05  65
05GF187        17:39:40.6 -20:31:52 16.6        64
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 17.4 km RECON observability=0.8 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 09:03:53 -15.1 AT Up 18.4 188.4 Really Low 08:48:53 - 09:18:53 6326
Sleaford 09:03:12 -10.5 NT Up 14.7 202.0 Really Low 08:48:12 - 09:18:12 6313
Kelowna 09:03:49 -15.7 AT Up 19.1 189.3 Really Low 08:48:49 - 09:18:49 6295
Peachland 09:03:50 -15.9 AT Up 19.3 189.0 Really Low 08:48:50 - 09:18:50 6291
Summerland 09:03:49 -16.0 AT Up 19.4 189.1 Really Low 08:48:49 - 09:18:49 6285
Penticton 09:03:49 -16.1 AT Up 19.5 189.2 Really Low 08:48:49 - 09:18:49 6282
Oliver 09:03:49 -16.4 AT Up 19.8 189.3 Really Low 08:48:49 - 09:18:49 6269
Anarchist Mountain Observatory 09:03:48 -16.5 AT Up 20.0 189.5 Really Low 08:48:48 - 09:18:48 6263
Victoria 09:04:01 -17.6 AT Up 20.8 185.5 Low 08:49:01 - 09:19:01 6247
Okanogan 09:03:48 -17.2 AT Up 20.6 189.3 Low 08:48:48 - 09:18:48 6237
Brewster 09:03:49 -17.5 AT Up 20.9 189.1 Low 08:48:49 - 09:18:49 6226
Manson/Chelan 09:03:50 -17.7 AT Up 21.2 188.7 Low 08:48:50 - 09:18:50 6219
Wenatchee 09:03:50 -18.2 Dark Up 21.6 188.6 Low 08:48:50 - 09:18:50 6199
Ellensburg 09:03:50 -18.7 Dark Up 22.1 188.4 Low 08:48:50 - 09:18:50 6182
Yakima 09:03:50 -19.1 Dark Up 22.5 188.4 Low 08:48:50 - 09:18:50 6165
Toppenish/White Swan 09:03:50 -19.2 Dark Up 22.7 188.6 Low 08:48:50 - 09:18:50 6155
PNWRO 09:03:45 -19.3 Dark Up 22.9 190.1 Low 08:48:45 - 09:18:45 6136
The Dalles 09:03:52 -20.1 Dark Up 23.5 187.9 Low 08:48:52 - 09:18:52 6122
Maupin 09:03:51 -20.5 Dark Up 23.9 188.0 Low 08:48:51 - 09:18:51 6103
Sisters 09:03:53 -21.5 Dark Up 24.8 187.5 Low 08:48:53 - 09:18:53 6063
Bend 09:03:51 -21.6 Dark Up 25.1 187.8 Low 08:48:51 - 09:18:51 6052
Oregon Observatory 09:03:52 -21.8 Dark Up 25.2 187.7 Low 08:48:52 - 09:18:52 6044
Chiloquin 09:03:53 -23.2 Dark Up 26.6 187.4 Low 08:48:53 - 09:18:53 5979
Klamath Falls 09:03:53 -23.5 Dark Up 26.9 187.5 Low 08:48:53 - 09:18:53 5962
Cedarville 09:03:47 -23.9 Dark Up 27.4 189.2 Low 08:48:47 - 09:18:47 5924
Fall River/Burney 09:03:50 -24.6 Dark Up 28.0 187.9 Low 08:48:50 - 09:18:50 5900
Greenville 09:03:49 -25.4 Dark Up 28.9 188.5 Low 08:48:49 - 09:18:49 5851
Gimple 09:03:48 -25.3 Dark Up 28.9 188.6 Low 08:48:48 - 09:18:48 5851
Quincy 09:03:49 -25.6 Dark Up 29.1 188.5 Low 08:48:49 - 09:18:49 5840
Portola 09:03:46 -25.6 Dark Up 29.2 189.0 Low 08:48:46 - 09:18:46 5833
Reno 09:03:44 -25.7 Dark Up 29.3 189.7 Low 08:48:44 - 09:18:44 5817
Carson City 09:03:44 -26.0 Dark Up 29.7 189.8 Low 08:48:44 - 09:18:44 5797
Yerington 09:03:41 -26.1 Dark Up 29.8 190.4 Low 08:48:41 - 09:18:41 5785
Gardnerville 09:03:44 -26.3 Dark Up 29.9 189.8 Low 08:48:44 - 09:18:44 5783
Dunrhomin 09:02:53 -20.6 Dark Up 25.4 204.4 Low 08:47:53 - 09:17:53 5774
Nikitin 09:02:54 -20.8 Dark Up 25.6 204.4 Low 08:47:54 - 09:17:54 5764
CU-SBO 09:02:53 -20.9 Dark Up 25.7 204.3 Low 08:47:53 - 09:17:53 5761
Hawthorne 09:03:39 -26.4 Dark Up 30.2 191.1 Up 08:48:39 - 09:18:39 5757
Lee Vining 09:03:41 -27.1 Dark Up 30.8 190.6 Up 08:48:41 - 09:18:41 5727
Bishop 09:03:38 -27.4 Dark Up 31.3 191.4 Up 08:48:38 - 09:18:38 5689
Beatty 09:03:31 -27.5 Dark Up 31.5 193.2 Up 08:48:31 - 09:18:31 5656
Patrick 09:03:20 -28.0 Dark Up 32.3 196.5 Up 08:48:20 - 09:18:20 5552
Laughlin/Bullhead City 09:03:22 -28.4 Dark Up 32.7 195.8 Up 08:48:22 - 09:18:22 5540
Lake Havasu City 09:03:20 -29.0 Dark Up 33.3 196.2 Up 08:48:20 - 09:18:20 5496
Wildwood 09:03:37 -30.6 Dark Up 34.5 191.6 Up 08:48:37 - 09:18:37 5488
Idyllwild 09:03:29 -30.4 Dark Up 34.5 193.8 Up 08:48:29 - 09:18:29 5459
George/Scottsdale 09:03:10 -28.9 Dark Up 33.4 199.0 Up 08:48:10 - 09:18:10 5432
Calipatria 09:03:24 -30.6 Dark Up 34.9 195.2 Up 08:48:24 - 09:18:24 5413
Yuma 09:03:20 -30.7 Dark Up 35.1 196.2 Up 08:48:20 - 09:18:20 5380

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, (2023/06/09 09:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.84  79
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.18  72
PPM 267109     17:38:44.8 -21:54:46  6.4  1.40  64
PPM 267087     17:37:50.6 -20:40:03  8.4  0.18  65
PPM 267097     17:38:08.8 -20:33:21  9.4  0.05  65
05GF187        17:38:16.9 -20:31:09 16.6        65
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:27:03 UT

Marc W. Buie, Southwest Research Institute

RECON