RECON: TNO occultation with 09YG19

Event between 09YG19 and star GA1120:02133807 with event index number of 2075840

Geocentric closest approach at 2027/12/22 03:24:36 UTC

J2000 position of star is 06:27:10.9 +23:00:13
Equinox of date position of star is 06:28:32.3 +22:59:18
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 37.7 AU from the Sun and 36.7 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 260 seconds.
The 1-sigma cross-track error in the shadow position is 1515 km.
The sky-plane scale is 26629.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=356.5 km assuming a 5% albedo -- 14.4 sec chord
Diameter=145.5 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 09YG19, (2027/12/22 03:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:41.2 +07:24:36  0.4 17.39 111
Alhena         06:39:19.6 +16:22:23  1.9  7.05 102
PPM 095944     06:27:15.0 +23:18:33  6.0  0.50 106
PPM 095937     06:27:02.6 +23:02:21  9.0  0.43 106
PPM 096027     06:30:11.3 +23:02:27 10.2  0.31 106
09YG19         06:28:52.6 +22:59:04 14.5       106
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 3.5 sigma about the mid-time.
The median site spacing is 27.9 km RECON observability=1.0 and success probability=27.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:27:25 -31.7 Dark Down 27.1 86.0 Low 03:12:25 - 03:42:25 2199
Kelowna 03:27:27 -32.2 Dark Down 27.6 86.3 Low 03:12:27 - 03:42:27 2111
Peachland 03:27:28 -32.1 Dark Down 27.4 86.0 Low 03:12:28 - 03:42:28 2109
Victoria 03:27:34 -29.7 Dark Down 24.9 82.8 Low 03:12:34 - 03:42:34 2107
Summerland 03:27:28 -32.1 Dark Down 27.4 86.0 Low 03:12:28 - 03:42:28 2095
Penticton 03:27:28 -32.2 Dark Down 27.5 86.1 Low 03:12:28 - 03:42:28 2086
Oliver 03:27:29 -32.2 Dark Down 27.5 85.9 Low 03:12:29 - 03:42:29 2058
Anarchist Mountain Observatory 03:27:30 -32.3 Dark Down 27.6 85.9 Low 03:12:30 - 03:42:30 2039
Tonasket 03:27:31 -32.3 Dark Down 27.5 85.7 Low 03:12:31 - 03:42:31 2015
Okanogan 03:27:32 -32.2 Dark Down 27.4 85.5 Low 03:12:32 - 03:42:32 1992
Sleaford 03:27:05 -40.3 Dark Down 35.9 98.4 Up 03:12:05 - 03:42:05 1979
Brewster 03:27:33 -32.1 Dark Down 27.3 85.2 Low 03:12:33 - 03:42:33 1975
Manson/Chelan 03:27:34 -31.8 Dark Down 27.0 84.8 Low 03:12:34 - 03:42:34 1967
Wenatchee 03:27:35 -31.7 Dark Down 26.8 84.5 Low 03:12:35 - 03:42:35 1932
Ellensburg 03:27:37 -31.5 Dark Down 26.7 84.1 Low 03:12:37 - 03:42:37 1904
Yakima 03:27:38 -31.5 Dark Down 26.6 83.9 Low 03:12:38 - 03:42:38 1871
Toppenish/White Swan 03:27:38 -31.6 Dark Down 26.7 83.9 Low 03:12:38 - 03:42:38 1848
Goldendale 03:27:40 -31.3 Dark Down 26.3 83.3 Low 03:12:40 - 03:42:40 1813
The Dalles 03:27:41 -31.1 Dark Down 26.1 83.0 Low 03:12:41 - 03:42:41 1804
PNWRO 03:27:38 -32.7 Dark Down 27.7 84.7 Low 03:12:38 - 03:42:38 1775
Maupin 03:27:42 -31.1 Dark Down 26.1 82.8 Low 03:12:42 - 03:42:42 1766
Sisters 03:27:45 -30.7 Dark Down 25.6 82.1 Low 03:12:45 - 03:42:45 1705
Bend 03:27:46 -30.9 Dark Down 25.8 82.2 Low 03:12:46 - 03:42:46 1677
Oregon Observatory 03:27:46 -30.8 Dark Down 25.7 82.0 Low 03:12:46 - 03:42:46 1666
North Lake 03:27:48 -31.1 Dark Down 26.0 82.0 Low 03:12:48 - 03:42:48 1595
Chiloquin 03:27:51 -30.4 Dark Down 25.2 81.1 Low 03:12:51 - 03:42:51 1564
Klamath Falls 03:27:51 -30.4 Dark Down 25.2 81.0 Low 03:12:51 - 03:42:51 1532
Lakeview 03:27:50 -31.5 Dark Down 26.2 81.9 Low 03:12:50 - 03:42:50 1486
Cedarville 03:27:52 -31.6 Dark Down 26.3 81.7 Low 03:12:52 - 03:42:52 1422
Fall River/Burney 03:27:54 -30.6 Dark Down 25.3 80.7 Low 03:12:54 - 03:42:54 1416
Susanville 03:27:55 -31.1 Dark Down 25.8 80.9 Low 03:12:55 - 03:42:55 1337
Greenville 03:27:56 -30.9 Dark Down 25.5 80.6 Low 03:12:56 - 03:42:56 1321
Gimple 03:27:56 -30.9 Dark Down 25.6 80.6 Low 03:12:56 - 03:42:56 1318
Quincy 03:27:56 -30.9 Dark Down 25.5 80.5 Low 03:12:56 - 03:42:56 1303
Portola 03:27:57 -31.2 Dark Down 25.8 80.7 Low 03:12:57 - 03:42:57 1277
Reno 03:27:56 -31.7 Dark Down 26.3 80.9 Low 03:12:56 - 03:42:56 1233
Carson City 03:27:57 -31.7 Dark Down 26.2 80.8 Low 03:12:57 - 03:42:57 1199
Gardnerville 03:27:58 -31.7 Dark Down 26.2 80.7 Low 03:12:58 - 03:42:58 1176
Yerington 03:27:57 -32.1 Dark Down 26.7 81.0 Low 03:12:57 - 03:42:57 1162
Hawthorne 03:27:57 -32.5 Dark Down 27.0 81.1 Low 03:12:57 - 03:42:57 1103
Lee Vining 03:28:00 -32.1 Dark Down 26.6 80.6 Low 03:13:00 - 03:43:00 1066
Tonopah 03:27:57 -33.6 Dark Down 28.1 81.7 Low 03:12:57 - 03:42:57 1016
Bishop 03:28:00 -32.6 Dark Down 27.0 80.7 Low 03:13:00 - 03:43:00 988
Beatty 03:27:59 -33.8 Dark Down 28.2 81.3 Low 03:12:59 - 03:42:59 893
Dunrhomin 03:27:34 -42.8 Dark Down 37.4 90.2 Up 03:12:34 - 03:42:34 885
CU-SBO 03:27:35 -42.8 Dark Down 37.4 89.9 Up 03:12:35 - 03:42:35 864
Indian Springs 03:27:58 -34.7 Dark Down 29.1 81.7 Low 03:12:58 - 03:42:58 829
Henderson 03:27:59 -35.2 Dark Down 29.5 81.8 Low 03:12:59 - 03:42:59 757
Wildwood 03:28:08 -32.0 Dark Down 26.3 78.9 Low 03:13:08 - 03:43:08 685
Patrick 03:27:59 -36.0 Dark Down 30.3 82.0 Up 03:12:59 - 03:42:59 662
Laughlin/Bullhead City 03:28:00 -35.4 Dark Down 29.7 81.5 Low 03:13:00 - 03:43:00 660
Kingman/Dolan Springs 03:27:59 -35.8 Dark Down 30.2 81.8 Up 03:12:59 - 03:42:59 647
Mohave Valley 03:28:01 -35.4 Dark Down 29.7 81.3 Low 03:13:01 - 03:43:01 634
Idyllwild 03:28:06 -33.5 Dark Down 27.8 79.7 Low 03:13:06 - 03:43:06 590
Lake Havasu City 03:28:01 -35.6 Dark Down 29.8 81.2 Low 03:13:01 - 03:43:01 587
Parker 03:28:02 -35.6 Dark Down 29.8 81.0 Low 03:13:02 - 03:43:02 552
Calipatria 03:28:06 -34.4 Dark Down 28.6 79.9 Low 03:13:06 - 03:43:06 492
George/Scottsdale 03:27:59 -37.5 Dark Down 31.7 82.0 Up 03:12:59 - 03:42:59 436
Yuma 03:28:05 -35.1 Dark Down 29.3 80.1 Low 03:13:05 - 03:43:05 421

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, (2027/12/22 03:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.39 111
Alhena         06:37:42.8 +16:23:57  1.9  7.05 102
PPM 095944     06:25:33.0 +23:19:37  6.0  0.50 106
PPM 095937     06:25:20.8 +23:03:25  9.0  0.43 106
PPM 096027     06:28:29.5 +23:03:38 10.2  0.31 106
09YG19         06:27:10.9 +23:00:13 14.5       106
Positions are for J2000

Event circumstances last updated at 2022/05/19 23:04:51 UT

Marc W. Buie, Southwest Research Institute

RECON