RECON: TNO occultation with 16GR206

Event between 16GR206 and star GA0820:04666808 with event index number of 2166138

Geocentric closest approach at 2027/06/10 08:05:55 UTC

J2000 position of star is 15:09:48.4 -06:41:04
Equinox of date position of star is 15:11:03.4 -06:46:22
Stellar brightness G=14.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 73 degrees from the moon. Moon is 38% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 19.4 AU from the Sun and 18.5 AU from the Earth.
Apparent velocity is 18.6 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 128 seconds.
The 1-sigma cross-track error in the shadow position is 1299 km.
The sky-plane scale is 13431.0 km/arcsec.

The object has an absolute magnitude Hv=9.1
Diameter=88.3 km assuming a 5% albedo -- 4.8 sec chord
Diameter=36.1 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 16GR206, (2027/06/10 08:05UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:38.6 -11:18:13  1.0 26.21  49
27Bet Lib      15:18:29.3 -09:28:57  2.6  3.23  75
19Del Lib      15:02:26.6 -08:37:34  4.9  2.86  71
PPM 198304     15:11:23.6 -06:49:15  8.5  0.05  73
16GR206        15:11:16.0 -06:47:15 14.4        73
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 5.0 sigma about the mid-time.
The median site spacing is 25.1 km RECON observability=1.0 and success probability=0.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:03:41 -13.8 AT Down 19.4 229.2 Really Low 07:52:32 - 08:14:50 5042
Kamloops 08:04:19 -16.3 AT Down 26.4 215.7 Low 07:53:10 - 08:15:28 4988
Kelowna 08:04:14 -17.1 AT Down 26.8 216.8 Low 07:53:05 - 08:15:23 4939
Peachland 08:04:14 -17.2 AT Down 27.0 216.6 Low 07:53:05 - 08:15:23 4933
Summerland 08:04:14 -17.4 AT Down 27.1 216.7 Low 07:53:05 - 08:15:23 4924
Penticton 08:04:14 -17.4 AT Down 27.1 216.8 Low 07:53:05 - 08:15:23 4920
Oliver 08:04:12 -17.8 AT Down 27.4 216.9 Low 07:53:03 - 08:15:21 4898
Anarchist Mountain Observatory 08:04:11 -18.0 AT Down 27.4 217.2 Low 07:53:02 - 08:15:20 4888
Victoria 08:04:24 -18.5 Dark Down 29.3 213.2 Low 07:53:15 - 08:15:33 4860
Okanogan 08:04:10 -18.6 Dark Down 28.0 217.1 Low 07:53:01 - 08:15:19 4848
Brewster 08:04:10 -18.9 Dark Down 28.3 217.0 Low 07:53:01 - 08:15:19 4831
Manson/Chelan 08:04:11 -19.1 Dark Down 28.6 216.7 Low 07:53:02 - 08:15:20 4818
Wenatchee 08:04:11 -19.6 Dark Down 29.1 216.7 Low 07:53:02 - 08:15:20 4788
Ellensburg 08:04:10 -20.0 Dark Down 29.5 216.6 Low 07:53:01 - 08:15:19 4762
Yakima 08:04:09 -20.4 Dark Down 29.8 216.7 Low 07:53:00 - 08:15:18 4736
Toppenish/White Swan 08:04:08 -20.6 Dark Down 29.9 217.0 Low 07:52:59 - 08:15:17 4721
PNWRO 08:04:02 -21.0 Dark Down 29.6 218.6 Low 07:52:53 - 08:15:11 4696
The Dalles 08:04:09 -21.4 Dark Down 30.9 216.4 Up 07:53:00 - 08:15:18 4670
Maupin 08:04:08 -21.8 Dark Down 31.2 216.7 Up 07:52:59 - 08:15:17 4642
Sisters 08:04:08 -22.7 Dark Down 32.1 216.5 Up 07:52:59 - 08:15:17 4583
Bend 08:04:06 -22.9 Dark Down 32.2 216.8 Up 07:52:57 - 08:15:15 4567
Oregon Observatory 08:04:06 -23.1 Dark Down 32.4 216.8 Up 07:52:57 - 08:15:15 4555
Chiloquin 08:04:05 -24.4 Dark Down 33.6 216.8 Up 07:52:56 - 08:15:14 4463
Klamath Falls 08:04:04 -24.8 Dark Down 33.9 217.0 Up 07:52:55 - 08:15:13 4438
Cedarville 08:03:56 -25.5 Dark Down 33.7 219.0 Up 07:52:47 - 08:15:05 4387
Fall River/Burney 08:04:00 -26.0 Dark Down 34.6 217.9 Up 07:52:51 - 08:15:09 4352
Greenville 08:03:56 -26.9 Dark Down 35.1 218.8 Up 07:52:47 - 08:15:05 4285
Gimple 08:03:56 -26.9 Dark Down 35.1 218.9 Up 07:52:47 - 08:15:05 4285
Quincy 08:03:55 -27.1 Dark Down 35.3 218.9 Up 07:52:46 - 08:15:04 4270
Portola 08:03:54 -27.2 Dark Down 35.2 219.4 Up 07:52:45 - 08:15:03 4260
Dunrhomin 08:03:01 -25.1 Dark Down 26.5 233.7 Low 07:51:52 - 08:14:10 4257
Nikitin 08:03:00 -25.2 Dark Down 26.6 233.8 Low 07:51:51 - 08:14:09 4243
Reno 08:03:50 -27.4 Dark Down 35.1 220.2 Up 07:52:41 - 08:14:59 4239
CU-SBO 08:03:00 -25.3 Dark Down 26.7 233.7 Low 07:51:51 - 08:14:09 4239
Carson City 08:03:49 -27.8 Dark Down 35.3 220.4 Up 07:52:40 - 08:14:58 4212
Yerington 08:03:46 -28.0 Dark Down 35.2 221.1 Up 07:52:37 - 08:14:55 4196
Gardnerville 08:03:49 -28.0 Dark Down 35.5 220.5 Up 07:52:40 - 08:14:58 4193
Hawthorne 08:03:43 -28.4 Dark Down 35.2 221.9 Up 07:52:34 - 08:14:52 4160
Lee Vining 08:03:44 -29.0 Dark Down 35.9 221.7 Up 07:52:35 - 08:14:53 4117
Bishop 08:03:40 -29.6 Dark Down 36.0 222.7 Up 07:52:31 - 08:14:49 4069
Beatty 08:03:33 -30.0 Dark Down 35.4 224.5 Up 07:52:24 - 08:14:42 4030
Patrick 08:03:18 -31.2 Dark Down 34.8 228.1 Up 07:52:09 - 08:14:27 3905
Laughlin/Bullhead City 08:03:20 -31.5 Dark Down 35.4 227.5 Up 07:52:11 - 08:14:29 3886
Lake Havasu City 08:03:18 -32.2 Dark Down 35.7 228.1 Up 07:52:09 - 08:14:27 3830
Wildwood 08:03:34 -32.9 Dark Down 38.5 224.1 Up 07:52:25 - 08:14:43 3805
Idyllwild 08:03:25 -33.1 Dark Down 37.6 226.2 Up 07:52:16 - 08:14:34 3773
George/Scottsdale 08:03:07 -32.6 Dark Down 34.7 230.8 Up 07:51:58 - 08:14:16 3759
Calipatria 08:03:20 -33.6 Dark Down 37.3 227.7 Up 07:52:11 - 08:14:29 3718
Yuma 08:03:15 -34.0 Dark Down 37.1 228.8 Up 07:52:06 - 08:14:24 3680

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 16GR206, (2027/06/10 08:05UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 26.21  49
27Bet Lib      15:17:00.3 -09:22:59  2.6  3.23  75
19Del Lib      15:00:58.3 -08:31:08  4.9  2.86  71
PPM 198304     15:09:56.0 -06:43:04  8.5  0.05  73
16GR206        15:09:48.4 -06:41:04 14.4        73
Positions are for J2000

Event circumstances last updated at 2023/07/06 03:05:51 UT

Marc W. Buie, Southwest Research Institute

RECON