RECON: TNO occultation with 11UG412

Event between 11UG412 and star GA1100:00370898 with event index number of 2128840

Geocentric closest approach at 2027/12/01 08:32:47 UTC

J2000 position of star is 03:20:39.7 +20:53:53
Equinox of date position of star is 03:21:57.3 +20:58:39
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 127 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=24.2

[RECON map]
TNO is 44.7 AU from the Sun and 43.8 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 661 seconds.
The 1-sigma cross-track error in the shadow position is 5647 km.
The sky-plane scale is 31746.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.1 sec chord
Diameter=70.9 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 11UG412, (2027/12/01 08:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.5 +16:33:48  0.8 18.34 143
44Zet Per      03:55:53.6 +31:57:51  2.8 13.29 136
61Tau1Ari      03:22:50.7 +21:14:45  5.3  0.28 127
PPM 092419     03:22:28.2 +20:36:29  8.0  0.39 127
61Tau1Ari      03:22:50.7 +21:14:45  5.3  0.28 127
PPM 092420     03:22:35.7 +20:44:45 10.2  0.26 127
11UG412        03:22:16.5 +20:59:50 15.7       128
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 1.4 sigma about the mid-time.
The median site spacing is 29.9 km RECON observability=1.0 and success probability=10.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:30:26 -54.3 Dark Down 45.3 241.7 Up 08:15:26 - 08:45:26 297
Kamloops 08:30:59 -60.0 Dark Down 53.4 225.7 Up 08:15:59 - 08:45:59 186
Kelowna 08:30:57 -60.6 Dark Down 53.5 227.7 Up 08:15:57 - 08:45:57 99
Peachland 08:30:57 -60.8 Dark Down 53.7 227.4 Up 08:15:57 - 08:45:57 90
Summerland 08:30:57 -60.9 Dark Down 53.8 227.7 Up 08:15:57 - 08:45:57 74
Penticton 08:30:57 -60.9 Dark Down 53.8 227.9 Up 08:15:57 - 08:45:57 66
Oliver 08:30:56 -61.3 Dark Down 54.0 228.3 Up 08:15:56 - 08:45:56 31
Anarchist Mountain Observatory 08:30:56 -61.4 Dark Down 54.0 228.7 Up 08:15:56 - 08:45:56 12
Victoria 08:31:07 -62.7 Dark Down 56.3 223.6 Up 08:16:07 - 08:46:07 -10
Tonasket 08:30:56 -61.7 Dark Down 54.3 228.9 Up 08:15:56 - 08:45:56 -19
Okanogan 08:30:56 -62.0 Dark Down 54.6 229.1 Up 08:15:56 - 08:45:56 -52
Brewster 08:30:56 -62.3 Dark Down 54.8 229.1 Up 08:15:56 - 08:45:56 -79
Manson/Chelan 08:30:57 -62.6 Dark Down 55.2 228.8 Up 08:15:57 - 08:45:57 -98
Wenatchee 08:30:58 -63.1 Dark Down 55.6 229.1 Up 08:15:58 - 08:45:58 -146
Ellensburg 08:30:58 -63.5 Dark Down 56.0 229.3 Up 08:15:58 - 08:45:58 -187
Yakima 08:30:58 -63.9 Dark Down 56.2 229.7 Up 08:15:58 - 08:45:58 -229
Toppenish/White Swan 08:30:57 -64.1 Dark Down 56.3 230.2 Up 08:15:57 - 08:45:57 -252
PNWRO 08:30:53 -64.0 Dark Down 55.7 232.6 Up 08:15:53 - 08:45:53 -299
Goldendale 08:30:58 -64.7 Dark Down 56.9 230.2 Up 08:15:58 - 08:45:58 -307
The Dalles 08:30:59 -65.0 Dark Down 57.2 230.0 Up 08:15:59 - 08:45:59 -328
Maupin 08:30:59 -65.4 Dark Down 57.4 230.6 Up 08:15:59 - 08:45:59 -372
Sisters 08:31:00 -66.3 Dark Down 58.2 231.0 Up 08:16:00 - 08:46:00 -460
Bend 08:30:59 -66.5 Dark Down 58.2 231.7 Up 08:15:59 - 08:45:59 -487
Oregon Observatory 08:31:00 -66.7 Dark Down 58.4 231.7 Up 08:16:00 - 08:46:00 -504
North Lake 08:30:58 -67.1 Dark Down 58.5 233.3 Up 08:15:58 - 08:45:58 -575
Chiloquin 08:31:01 -68.0 Dark Down 59.5 232.9 Up 08:16:01 - 08:46:01 -640
Klamath Falls 08:31:01 -68.3 Dark Down 59.6 233.5 Up 08:16:01 - 08:46:01 -677
Lakeview 08:30:56 -67.9 Dark Down 58.8 235.5 Up 08:15:56 - 08:45:56 -691
Cedarville 08:30:56 -68.4 Dark Down 59.0 236.6 Up 08:15:56 - 08:45:56 -762
Fall River/Burney 08:30:59 -69.3 Dark Down 60.1 235.6 Up 08:15:59 - 08:45:59 -805
Susanville 08:30:57 -69.6 Dark Down 60.0 237.6 Up 08:15:57 - 08:45:57 -877
Greenville 08:30:58 -69.9 Dark Down 60.3 237.6 Up 08:15:58 - 08:45:58 -905
Gimple 08:30:57 -69.9 Dark Down 60.2 237.7 Up 08:15:57 - 08:45:57 -906
Quincy 08:30:58 -70.1 Dark Down 60.4 237.9 Up 08:15:58 - 08:45:58 -927
Dunrhomin 08:30:12 -61.8 Dark Down 49.3 254.4 Up 08:15:12 - 08:45:12 -932
Portola 08:30:56 -70.0 Dark Down 60.2 238.7 Up 08:15:56 - 08:45:56 -943
CU-SBO 08:30:12 -62.0 Dark Down 49.5 254.6 Up 08:15:12 - 08:45:12 -959
Reno 08:30:54 -70.0 Dark Down 59.9 239.9 Up 08:15:54 - 08:45:54 -977
Carson City 08:30:54 -70.3 Dark Down 60.0 240.5 Up 08:15:54 - 08:45:54 -1015
Yerington 08:30:52 -70.2 Dark Down 59.7 241.6 Up 08:15:52 - 08:45:52 -1041
Gardnerville 08:30:54 -70.5 Dark Down 60.1 240.9 Up 08:15:54 - 08:45:54 -1042
Hawthorne 08:30:50 -70.4 Dark Down 59.6 243.0 Up 08:15:50 - 08:45:50 -1094
Lee Vining 08:30:51 -71.1 Dark Down 60.1 243.2 Up 08:15:51 - 08:45:51 -1152
Tonopah 08:30:46 -70.1 Dark Down 58.8 245.3 Up 08:15:46 - 08:45:46 -1153
Bishop 08:30:49 -71.2 Dark Down 59.9 245.0 Up 08:15:49 - 08:45:49 -1221
Beatty 08:30:44 -70.8 Dark Down 58.9 247.6 Up 08:15:44 - 08:45:44 -1281
Indian Springs 08:30:41 -70.4 Dark Down 58.2 249.2 Up 08:15:41 - 08:45:41 -1321
Henderson 08:30:38 -70.4 Dark Down 57.9 250.8 Up 08:15:38 - 08:45:38 -1383
Patrick 08:30:34 -70.1 Dark Down 57.2 252.8 Up 08:15:34 - 08:45:34 -1455
Kingman/Dolan Springs 08:30:35 -70.4 Dark Down 57.5 252.9 Up 08:15:35 - 08:45:35 -1479
Laughlin/Bullhead City 08:30:37 -70.7 Dark Down 57.9 252.5 Up 08:15:37 - 08:45:37 -1480
Mohave Valley 08:30:37 -70.9 Dark Down 57.9 252.9 Up 08:15:37 - 08:45:37 -1509
Lake Havasu City 08:30:36 -71.0 Dark Down 57.9 253.7 Up 08:15:36 - 08:45:36 -1554
Wildwood 08:30:50 -73.8 Dark Down 61.3 250.2 Up 08:15:50 - 08:45:50 -1576
Parker 08:30:35 -71.2 Dark Down 57.9 254.3 Up 08:15:35 - 08:45:35 -1593
Idyllwild 08:30:43 -73.0 Dark Down 59.9 252.7 Up 08:15:43 - 08:45:43 -1627
George/Scottsdale 08:30:28 -69.8 Dark Down 56.1 257.0 Up 08:15:28 - 08:45:28 -1646
Calipatria 08:30:39 -72.6 Dark Down 59.2 254.8 Up 08:15:39 - 08:45:39 -1700
Yuma 08:30:37 -72.2 Dark Down 58.6 256.3 Up 08:15:37 - 08:45:37 -1751

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 11UG412, (2027/12/01 08:33UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 18.34 143
44Zet Per      03:54:07.9 +31:53:01  2.8 13.29 136
61Tau1Ari      03:21:13.7 +21:08:49  5.3  0.28 127
PPM 092419     03:20:51.5 +20:30:33  8.0  0.39 127
61Tau1Ari      03:21:13.7 +21:08:49  5.3  0.28 127
PPM 092420     03:20:59.0 +20:38:49 10.2  0.26 127
11UG412        03:20:39.7 +20:53:53 15.7       127
Positions are for J2000

Event circumstances last updated at 2022/05/18 23:00:42 UT

Marc W. Buie, Southwest Research Institute

RECON