RECON: TNO occultation with 05GF187

Event between 05GF187 and star GA0680:18870205 with event index number of 1277797

Geocentric closest approach at 2024/06/13 09:42:05 UTC

J2000 position of star is 17:48:53.0 -20:43:18
Equinox of date position of star is 17:50:18.4 -20:43:40
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 103 degrees from the moon. Moon is 42% 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 23.1 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 511 seconds.
The 1-sigma cross-track error in the shadow position is 1523 km.
The sky-plane scale is 20594.0 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, (2024/06/13 09:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.6 -26:29:03  0.9 19.06  86
35Eta Oph      17:11:46.9 -15:45:12  2.6 10.42  94
58 Oph         17:44:53.8 -21:41:34  4.9  1.59 102
PPM 267354     17:50:54.8 -20:50:12  8.0  0.17 103
05GF187        17:50:20.5 -20:43:41 15.4       104
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 1.8 sigma about the mid-time.
The median site spacing is 19.3 km RECON observability=0.7 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 09:41:09 -12.9 AT Down 16.5 199.4 Really Low 09:26:09 - 09:56:09 8799
Kelowna 09:41:05 -13.4 AT Down 17.1 200.3 Really Low 09:26:05 - 09:56:05 8761
Peachland 09:41:06 -13.6 AT Down 17.2 200.0 Really Low 09:26:06 - 09:56:06 8760
Summerland 09:41:05 -13.7 AT Down 17.3 200.1 Really Low 09:26:05 - 09:56:05 8753
Penticton 09:41:05 -13.7 AT Down 17.4 200.3 Really Low 09:26:05 - 09:56:05 8750
Victoria 09:41:15 -15.6 AT Down 19.1 196.7 Really Low 09:26:15 - 09:56:15 8738
Oliver 09:41:05 -14.0 AT Down 17.7 200.3 Really Low 09:26:05 - 09:56:05 8736
Anarchist Mountain Observatory 09:41:04 -14.1 AT Down 17.8 200.5 Really Low 09:26:04 - 09:56:04 8728
Okanogan 09:41:03 -14.8 AT Down 18.5 200.4 Really Low 09:26:03 - 09:56:03 8703
Sleaford 09:40:33 -7.3 NT Down 11.3 212.4 Really Low 09:25:33 - 09:55:33 8702
Brewster 09:41:04 -15.1 AT Down 18.8 200.2 Really Low 09:26:04 - 09:56:04 8693
Manson/Chelan 09:41:05 -15.4 AT Down 19.1 199.9 Really Low 09:26:05 - 09:56:05 8688
Wenatchee 09:41:05 -15.9 AT Down 19.5 199.8 Really Low 09:26:05 - 09:56:05 8669
Ellensburg 09:41:05 -16.3 AT Down 20.0 199.6 Really Low 09:26:05 - 09:56:05 8653
Yakima 09:41:04 -16.7 AT Down 20.4 199.6 Low 09:26:04 - 09:56:04 8635
Toppenish/White Swan 09:41:03 -16.8 AT Down 20.5 199.8 Low 09:26:03 - 09:56:03 8624
The Dalles 09:41:05 -17.8 AT Down 21.5 199.2 Low 09:26:05 - 09:56:05 8595
PNWRO 09:40:59 -16.7 AT Down 20.5 201.3 Low 09:25:59 - 09:55:59 8595
Maupin 09:41:04 -18.1 Dark Down 21.8 199.3 Low 09:26:04 - 09:56:04 8575
Sisters 09:41:05 -19.1 Dark Down 22.8 198.9 Low 09:26:05 - 09:56:05 8538
Bend 09:41:04 -19.2 Dark Down 22.9 199.2 Low 09:26:04 - 09:56:04 8525
Oregon Observatory 09:41:05 -19.4 Dark Down 23.1 199.1 Low 09:26:05 - 09:56:05 8517
Chiloquin 09:41:04 -20.7 Dark Down 24.5 198.9 Low 09:26:04 - 09:56:04 8455
Klamath Falls 09:41:04 -21.0 Dark Down 24.8 199.0 Low 09:26:04 - 09:56:04 8437
Cedarville 09:40:57 -21.2 Dark Down 25.0 200.7 Low 09:25:57 - 09:55:57 8387
Fall River/Burney 09:41:01 -22.0 Dark Down 25.8 199.6 Low 09:26:01 - 09:56:01 8371
Greenville 09:40:59 -22.7 Dark Down 26.5 200.2 Low 09:25:59 - 09:55:59 8318
Gimple 09:40:59 -22.7 Dark Down 26.5 200.3 Low 09:25:59 - 09:55:59 8317
Quincy 09:40:58 -22.9 Dark Down 26.7 200.2 Low 09:25:58 - 09:55:58 8307
Portola 09:40:57 -22.9 Dark Down 26.7 200.7 Low 09:25:57 - 09:55:57 8296
Reno 09:40:54 -22.9 Dark Down 26.8 201.4 Low 09:25:54 - 09:55:54 8275
Carson City 09:40:54 -23.2 Dark Down 27.1 201.5 Low 09:25:54 - 09:55:54 8254
Gardnerville 09:40:54 -23.4 Dark Down 27.3 201.6 Low 09:25:54 - 09:55:54 8240
Yerington 09:40:51 -23.2 Dark Down 27.1 202.2 Low 09:25:51 - 09:55:51 8237
Hawthorne 09:40:49 -23.4 Dark Down 27.4 202.8 Low 09:25:49 - 09:55:49 8205
Lee Vining 09:40:50 -24.1 Dark Down 28.1 202.4 Low 09:25:50 - 09:55:50 8177
Bishop 09:40:47 -24.4 Dark Down 28.4 203.2 Low 09:25:47 - 09:55:47 8133
Dunrhomin 09:40:08 -16.5 AT Down 20.9 214.9 Low 09:25:08 - 09:55:08 8125
Nikitin 09:40:07 -16.6 AT Down 21.1 214.9 Low 09:25:07 - 09:55:07 8115
CU-SBO 09:40:07 -16.7 AT Down 21.2 214.9 Low 09:25:07 - 09:55:07 8112
Beatty 09:40:41 -24.2 Dark Down 28.3 204.9 Low 09:25:41 - 09:55:41 8087
Patrick 09:40:29 -24.3 Dark Down 28.6 208.1 Low 09:25:29 - 09:55:29 7959
Laughlin/Bullhead City 09:40:31 -24.8 Dark Down 29.1 207.5 Low 09:25:31 - 09:55:31 7952
Wildwood 09:40:44 -27.4 Dark Down 31.5 203.8 Up 09:25:44 - 09:55:44 7930
Lake Havasu City 09:40:29 -25.3 Dark Down 29.6 207.9 Low 09:25:29 - 09:55:29 7905
Idyllwild 09:40:37 -26.9 Dark Down 31.1 205.7 Up 09:25:37 - 09:55:37 7886
Calipatria 09:40:32 -27.0 Dark Down 31.3 207.1 Up 09:25:32 - 09:55:32 7830
George/Scottsdale 09:40:20 -24.9 Dark Down 29.3 210.5 Low 09:25:20 - 09:55:20 7820
Yuma 09:40:28 -27.0 Dark Down 31.3 208.1 Up 09:25:28 - 09:55:28 7789

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, (2024/06/13 09:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.06  86
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.42  94
58 Oph         17:43:25.7 -21:41:00  4.9  1.59 102
PPM 267354     17:49:27.2 -20:49:51  8.0  0.17 103
05GF187        17:48:53.0 -20:43:18 15.4       103
Positions are for J2000

Event circumstances last updated at 2023/11/04 04:13:28 UT

Marc W. Buie, Southwest Research Institute

RECON