RECON: TNO occultation with 09YG19

Event between 09YG19 and star GA1120:01987019 with event index number of 1653783

Geocentric closest approach at 2027/01/10 04:04:51 UTC

J2000 position of star is 06:17:32.9 +22:56:16
Equinox of date position of star is 06:18:45.2 +22:55:45
Stellar brightness G=15.3, use SENSEUP=128
Star is 139 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 37.4 AU from the Sun and 36.5 AU from the Earth.
The TNO is moving 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 227 seconds.
The 1-sigma cross-track error in the shadow position is 1441 km.
The sky-plane scale is 26439.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=350.0 km assuming a 5% albedo -- 14.6 sec chord
Diameter=142.9 km assuming a 30% albedo -- 5.9 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 4.0 sigma about the mid-time.
The median site spacing is 24.1 km RECON observability=1.0 and success probability=32.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 04:06:56 -36.1 Dark Down 47.2 113.7 Up 03:51:56 - 04:21:56 1751
Kelowna 04:06:57 -36.1 Dark Down 47.3 113.1 Up 03:51:57 - 04:21:57 1717
Summerland 04:06:58 -36.0 Dark Down 47.3 112.7 Up 03:51:58 - 04:21:58 1696
Penticton 04:06:58 -36.1 Dark Down 47.3 112.7 Up 03:51:58 - 04:21:58 1688
Victoria 04:07:09 -33.7 Dark Down 45.4 107.9 Up 03:52:09 - 04:22:09 1659
Oliver 04:06:59 -36.1 Dark Down 47.5 112.4 Up 03:51:59 - 04:21:59 1655
Anarchist Mountain Observatory 04:06:59 -36.3 Dark Down 47.7 112.4 Up 03:51:59 - 04:21:59 1636
Tonasket 04:07:00 -36.3 Dark Down 47.7 112.0 Up 03:52:00 - 04:22:00 1607
Okanogan 04:07:00 -36.2 Dark Down 47.8 111.5 Up 03:52:00 - 04:22:00 1578
Brewster 04:07:02 -36.1 Dark Down 47.8 111.0 Up 03:52:02 - 04:22:02 1555
Manson/Chelan 04:07:03 -35.9 Dark Down 47.6 110.5 Up 03:52:03 - 04:22:03 1542
Entiat 04:07:04 -35.9 Dark Down 47.6 110.2 Up 03:52:04 - 04:22:04 1522
Wenatchee 04:07:05 -35.9 Dark Down 47.7 109.8 Up 03:52:05 - 04:22:05 1500
Ellensburg 04:07:06 -35.8 Dark Down 47.7 109.2 Up 03:52:06 - 04:22:06 1464
Yakima 04:07:07 -35.8 Dark Down 47.8 108.7 Up 03:52:07 - 04:22:07 1425
Toppenish/White Swan 04:07:07 -35.9 Dark Down 48.0 108.7 Up 03:52:07 - 04:22:07 1401
Pasco 04:07:04 -36.8 Dark Down 48.8 109.8 Up 03:52:04 - 04:22:04 1368
Goldendale 04:07:09 -35.7 Dark Down 47.9 107.7 Up 03:52:09 - 04:22:09 1356
The Dalles 04:07:10 -35.4 Dark Down 47.7 107.1 Up 03:52:10 - 04:22:10 1340
PNWRO 04:07:04 -37.0 Dark Down 49.1 109.7 Up 03:52:04 - 04:22:04 1340
Maupin 04:07:11 -35.6 Dark Down 47.9 106.8 Up 03:52:11 - 04:22:11 1298
Sisters 04:07:14 -35.3 Dark Down 47.8 105.4 Up 03:52:14 - 04:22:14 1221
Redmond 04:07:13 -35.5 Dark Down 48.1 105.7 Up 03:52:13 - 04:22:13 1211
Bend 04:07:14 -35.5 Dark Down 48.0 105.4 Up 03:52:14 - 04:22:14 1193
Oregon Observatory 04:07:14 -35.4 Dark Down 48.0 105.1 Up 03:52:14 - 04:22:14 1179
La Pine/Gilchrist 04:07:15 -35.3 Dark Down 48.0 104.8 Up 03:52:15 - 04:22:15 1160
North Lake 04:07:14 -35.8 Dark Down 48.5 104.9 Up 03:52:14 - 04:22:14 1106
Paisley 04:07:15 -36.1 Dark Down 48.9 104.6 Up 03:52:15 - 04:22:15 1044
Klamath Falls 04:07:19 -35.2 Dark Down 48.2 103.0 Up 03:52:19 - 04:22:19 1021
Lakeview 04:07:15 -36.2 Dark Down 49.2 104.2 Up 03:52:15 - 04:22:15 990
Cedarville 04:07:16 -36.4 Dark Down 49.5 103.6 Up 03:52:16 - 04:22:16 921
Fall River/Burney 04:07:20 -35.5 Dark Down 48.7 102.0 Up 03:52:20 - 04:22:20 896
Susanville 04:07:19 -36.1 Dark Down 49.4 101.9 Up 03:52:19 - 04:22:19 819
Greenville 04:07:21 -35.9 Dark Down 49.2 101.4 Up 03:52:21 - 04:22:21 796
Gimple 04:07:20 -35.9 Dark Down 49.3 101.4 Up 03:52:20 - 04:22:20 795
Quincy 04:07:21 -35.9 Dark Down 49.3 101.2 Up 03:52:21 - 04:22:21 776
Portola 04:07:20 -36.2 Dark Down 49.7 101.4 Up 03:52:20 - 04:22:20 754
Reno 04:07:19 -36.7 Dark Down 50.2 101.6 Up 03:52:19 - 04:22:19 714
Carson City 04:07:19 -36.7 Dark Down 50.3 101.2 Up 03:52:19 - 04:22:19 677
Gardnerville 04:07:20 -36.8 Dark Down 50.4 101.0 Up 03:52:20 - 04:22:20 652
Yerington 04:07:18 -37.2 Dark Down 50.8 101.5 Up 03:52:18 - 04:22:18 645
Hawthorne 04:07:17 -37.7 Dark Down 51.3 101.4 Up 03:52:17 - 04:22:17 588
Niwot 04:06:35 -47.7 Dark Down 60.5 117.0 Up 03:51:35 - 04:21:35 546
Lee Vining 04:07:19 -37.3 Dark Down 51.0 100.3 Up 03:52:19 - 04:22:19 539
SwRI 04:06:36 -47.7 Dark Down 60.5 116.7 Up 03:51:36 - 04:21:36 536
Tonopah 04:07:14 -38.8 Dark Down 52.5 101.9 Up 03:52:14 - 04:22:14 513
Bishop 04:07:18 -37.8 Dark Down 51.7 100.1 Up 03:52:18 - 04:22:18 463
Beatty 04:07:15 -39.1 Dark Down 53.1 100.8 Up 03:52:15 - 04:22:15 385
Indian Springs 04:07:12 -40.0 Dark Down 54.0 101.2 Up 03:52:12 - 04:22:12 331
CPSLO 04:07:28 -36.0 Dark Down 50.2 96.0 Up 03:52:28 - 04:22:28 295
Henderson 04:07:11 -40.6 Dark Down 54.6 101.1 Up 03:52:11 - 04:22:11 263
Searchlight/Boulder City 04:07:11 -40.6 Dark Down 54.8 100.3 Up 03:52:11 - 04:22:11 202
Patrick 04:07:08 -41.5 Dark Down 55.6 101.1 Up 03:52:08 - 04:22:08 177
Laughlin/Bullhead City 04:07:11 -40.9 Dark Down 55.1 100.2 Up 03:52:11 - 04:22:11 164
Kingman/Dolan Springs 04:07:09 -41.3 Dark Down 55.5 100.6 Up 03:52:09 - 04:22:09 157
Mohave Valley 04:07:11 -40.9 Dark Down 55.1 99.8 Up 03:52:11 - 04:22:11 135
DCO 04:07:06 -42.0 Dark Down 56.2 101.2 Up 03:52:06 - 04:22:06 133
Wildwood 04:07:24 -37.6 Dark Down 52.0 95.9 Up 03:52:24 - 04:22:24 127
Lake Havasu City 04:07:11 -41.1 Dark Down 55.4 99.4 Up 03:52:11 - 04:22:11 88
Idyllwild 04:07:19 -39.1 Dark Down 53.6 96.7 Up 03:52:19 - 04:22:19 52
Parker 04:07:11 -41.1 Dark Down 55.5 98.9 Up 03:52:11 - 04:22:11 51
Blythe 04:07:13 -40.9 Dark Down 55.3 98.0 Up 03:52:13 - 04:22:13 1
Calipatria 04:07:16 -40.1 Dark Down 54.6 96.6 Up 03:52:16 - 04:22:16 -35
George/Scottsdale 04:07:04 -43.1 Dark Down 57.5 100.1 Up 03:52:04 - 04:22:04 -36
Yuma 04:07:14 -40.8 Dark Down 55.4 96.6 Up 03:52:14 - 04:22:14 -97

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 2019/11/18 20:50:30 UT

Marc W. Buie, Southwest Research Institute

RECON