RECON: TNO occultation with 09YG19

Event between 09YG19 and star GA1120:01987019 with event index number of 2075764

Geocentric closest approach at 2027/01/10 04:05:09 UTC

J2000 position of star is 06:17:32.9 +22:56:16
Equinox of date position of star is 06:18:56.9 +22:55:40
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 139 degrees from the moon. Moon is 5% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 37.4 AU from the Sun and 36.5 AU from the Earth.
Apparent velocity is 23.8 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 186 seconds.
The 1-sigma cross-track error in the shadow position is 1395 km.
The sky-plane scale is 26439.0 km/arcsec.

The object has an absolute magnitude Hv=6.1
Diameter=356.5 km assuming a 5% albedo -- 15.0 sec chord
Diameter=145.5 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 09YG19, (2027/01/10 04:05UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.1 +07:24:35  0.4 16.44 132
Alhena         06:39:16.4 +16:22:26  1.9  8.08 144
7Eta Gem       06:16:30.6 +22:29:47  4.5  0.75 139
PPM 095769     06:21:01.1 +23:15:41  7.7  0.54 140
PPM 095732     06:19:38.5 +22:38:45  9.2  0.30 139
PPM 095715     06:19:09.3 +22:50:20 11.6  0.09 139
09YG19         06:19:11.2 +22:55:33 15.3       140
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 4.8 sigma about the mid-time.
The median site spacing is 35.6 km RECON observability=1.0 and success probability=32.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:07:14 -35.5 Dark Down 46.5 113.1 Up 03:52:14 - 04:22:14 2046
Sleaford 04:06:38 -43.7 Dark Down 53.3 131.3 Up 03:51:38 - 04:21:38 1992
Kelowna 04:07:15 -36.1 Dark Down 47.3 113.2 Up 03:52:15 - 04:22:15 1956
Peachland 04:07:15 -36.0 Dark Down 47.2 112.8 Up 03:52:15 - 04:22:15 1950
Summerland 04:07:16 -36.1 Dark Down 47.3 112.7 Up 03:52:16 - 04:22:16 1935
Penticton 04:07:15 -36.1 Dark Down 47.4 112.8 Up 03:52:15 - 04:22:15 1927
Victoria 04:07:26 -33.8 Dark Down 45.4 108.0 Up 03:52:26 - 04:22:26 1897
Oliver 04:07:16 -36.2 Dark Down 47.5 112.4 Up 03:52:16 - 04:22:16 1894
Anarchist Mountain Observatory 04:07:16 -36.3 Dark Down 47.7 112.5 Up 03:52:16 - 04:22:16 1875
Okanogan 04:07:18 -36.3 Dark Down 47.8 111.6 Up 03:52:18 - 04:22:18 1817
Brewster 04:07:19 -36.2 Dark Down 47.8 111.1 Up 03:52:19 - 04:22:19 1794
Manson/Chelan 04:07:20 -36.0 Dark Down 47.6 110.5 Up 03:52:20 - 04:22:20 1781
Wenatchee 04:07:22 -35.9 Dark Down 47.7 109.9 Up 03:52:22 - 04:22:22 1738
Ellensburg 04:07:23 -35.8 Dark Down 47.7 109.2 Up 03:52:23 - 04:22:23 1703
Yakima 04:07:24 -35.8 Dark Down 47.8 108.8 Up 03:52:24 - 04:22:24 1664
Toppenish/White Swan 04:07:24 -36.0 Dark Down 48.0 108.7 Up 03:52:24 - 04:22:24 1640
The Dalles 04:07:28 -35.5 Dark Down 47.7 107.2 Up 03:52:28 - 04:22:28 1579
PNWRO 04:07:21 -37.0 Dark Down 49.1 109.8 Up 03:52:21 - 04:22:21 1579
Maupin 04:07:28 -35.6 Dark Down 47.9 106.8 Up 03:52:28 - 04:22:28 1537
Sisters 04:07:31 -35.3 Dark Down 47.8 105.5 Up 03:52:31 - 04:22:31 1460
Bend 04:07:31 -35.5 Dark Down 48.1 105.4 Up 03:52:31 - 04:22:31 1432
Oregon Observatory 04:07:32 -35.4 Dark Down 48.0 105.1 Up 03:52:32 - 04:22:32 1418
Chiloquin 04:07:35 -35.2 Dark Down 48.1 103.4 Up 03:52:35 - 04:22:35 1296
Klamath Falls 04:07:36 -35.3 Dark Down 48.2 103.1 Up 03:52:36 - 04:22:36 1260
Cedarville 04:07:33 -36.5 Dark Down 49.5 103.7 Up 03:52:33 - 04:22:33 1160
Fall River/Burney 04:07:37 -35.6 Dark Down 48.8 102.1 Up 03:52:37 - 04:22:37 1135
Greenville 04:07:38 -35.9 Dark Down 49.3 101.4 Up 03:52:38 - 04:22:38 1035
Gimple 04:07:37 -36.0 Dark Down 49.3 101.5 Up 03:52:37 - 04:22:37 1033
Quincy 04:07:38 -35.9 Dark Down 49.3 101.2 Up 03:52:38 - 04:22:38 1015
Portola 04:07:37 -36.3 Dark Down 49.7 101.5 Up 03:52:37 - 04:22:37 993
Reno 04:07:36 -36.8 Dark Down 50.2 101.7 Up 03:52:36 - 04:22:36 953
Carson City 04:07:36 -36.8 Dark Down 50.3 101.3 Up 03:52:36 - 04:22:36 916
Gardnerville 04:07:37 -36.8 Dark Down 50.4 101.0 Up 03:52:37 - 04:22:37 890
Yerington 04:07:35 -37.3 Dark Down 50.9 101.6 Up 03:52:35 - 04:22:35 884
Hawthorne 04:07:34 -37.7 Dark Down 51.4 101.4 Up 03:52:34 - 04:22:34 826
Dunrhomin 04:06:52 -47.7 Dark Down 60.5 117.3 Up 03:51:52 - 04:21:52 800
Nikitin 04:06:53 -47.8 Dark Down 60.6 117.0 Up 03:51:53 - 04:21:53 781
Lee Vining 04:07:37 -37.3 Dark Down 51.1 100.3 Up 03:52:37 - 04:22:37 778
CU-SBO 04:06:53 -47.7 Dark Down 60.5 116.8 Up 03:51:53 - 04:21:53 775
Bishop 04:07:36 -37.9 Dark Down 51.8 100.2 Up 03:52:36 - 04:22:36 702
Beatty 04:07:32 -39.2 Dark Down 53.1 100.9 Up 03:52:32 - 04:22:32 624
Patrick 04:07:25 -41.5 Dark Down 55.7 101.1 Up 03:52:25 - 04:22:25 416
Laughlin/Bullhead City 04:07:28 -41.0 Dark Down 55.2 100.2 Up 03:52:28 - 04:22:28 403
Wildwood 04:07:41 -37.7 Dark Down 52.1 95.9 Up 03:52:41 - 04:22:41 366
Lake Havasu City 04:07:28 -41.2 Dark Down 55.5 99.5 Up 03:52:28 - 04:22:28 327
Idyllwild 04:07:36 -39.2 Dark Down 53.6 96.7 Up 03:52:36 - 04:22:36 291
Calipatria 04:07:33 -40.2 Dark Down 54.7 96.7 Up 03:52:33 - 04:22:33 204
George/Scottsdale 04:07:21 -43.2 Dark Down 57.6 100.2 Up 03:52:21 - 04:22:21 203
Yuma 04:07:31 -40.9 Dark Down 55.5 96.7 Up 03:52:31 - 04:22:31 142

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 09YG19, (2027/01/10 04:05UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 16.44 132
Alhena         06:37:42.8 +16:23:57  1.9  8.08 144
7Eta Gem       06:14:52.6 +22:30:24  4.5  0.75 139
PPM 095769     06:19:22.5 +23:16:28  7.7  0.54 140
PPM 095732     06:18:00.3 +22:39:30  9.2  0.30 139
PPM 095715     06:17:31.0 +22:51:03 11.6  0.09 139
09YG19         06:17:32.9 +22:56:16 15.3       139
Positions are for J2000

Event circumstances last updated at 2023/01/31 03:41:23 UT

Marc W. Buie, Southwest Research Institute

RECON