RECON: TNO occultation with 12YF12

Event between 12YF12 and star GA0880:01119228 with event index number of 2036762

Geocentric closest approach at 2023/04/17 03:34:50 UTC

J2000 position of star is 06:16:37.5 -00:44:17
Equinox of date position of star is 06:17:44.7 -00:44:50
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 104 degrees from the moon. Moon is 12% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 41.1 AU from the Sun and 41.4 AU from the Earth.
The TNO is moving 19.7 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 197 seconds.
The 1-sigma cross-track error in the shadow position is 2511 km.
The sky-plane scale is 30043.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.0
Diameter=375.0 km assuming a 5% albedo -- 19.0 sec chord
Diameter=153.1 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12YF12, (2023/04/17 03:41UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:26.0 +07:24:34  0.4  9.74 100
34Del Ori      05:33:11.9 -00:17:01  2.2 11.16  93
PPM 176187     06:16:45.4 -00:31:22  6.2  0.35 104
12YF12         06:17:48.7 -00:44:52 16.5       104
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 4.6 sigma about the mid-time.
The median site spacing is 37.3 km RECON observability=0.2 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)
Kamloops 03:39:22 -6.9 NT Down 25.8 232.2 Low 03:24:22 - 03:54:22 8432
Victoria 03:39:14 -6.0 CT Down 28.7 230.1 Low 03:24:14 - 03:54:14 8333
Kelowna 03:39:23 -7.8 NT Down 25.8 233.4 Low 03:24:23 - 03:54:23 8329
Peachland 03:39:21 -7.6 NT Down 26.1 233.1 Low 03:24:21 - 03:54:21 8328
Summerland 03:39:23 -7.8 NT Down 26.1 233.3 Low 03:24:23 - 03:54:23 8311
Penticton 03:39:22 -7.9 NT Down 26.1 233.4 Low 03:24:22 - 03:54:22 8301
Oliver 03:39:23 -8.0 NT Down 26.3 233.5 Low 03:24:23 - 03:54:23 8268
Anarchist Mountain Observatory 03:39:22 -8.2 NT Down 26.3 233.8 Low 03:24:22 - 03:54:22 8246
Tonasket 03:39:25 -8.3 NT Down 26.5 233.9 Low 03:24:25 - 03:54:25 8219
Okanogan 03:39:23 -8.4 NT Down 26.8 233.9 Low 03:24:23 - 03:54:23 8192
Sleaford 03:39:44 -13.8 AT Down 17.4 245.0 Really Low 03:24:44 - 03:54:44 8185
Brewster 03:39:24 -8.4 NT Down 27.1 233.8 Low 03:24:24 - 03:54:24 8173
Manson/Chelan 03:39:21 -8.2 NT Down 27.4 233.5 Low 03:24:21 - 03:54:21 8165
Wenatchee 03:39:21 -8.3 NT Down 27.8 233.5 Low 03:24:21 - 03:54:21 8126
Ellensburg 03:39:21 -8.4 NT Down 28.1 233.5 Low 03:24:21 - 03:54:21 8095
Yakima 03:39:21 -8.5 NT Down 28.4 233.7 Low 03:24:21 - 03:54:21 8056
Toppenish/White Swan 03:39:22 -8.7 NT Down 28.4 233.9 Low 03:24:22 - 03:54:22 8030
Goldendale 03:39:22 -8.7 NT Down 29.0 233.8 Low 03:24:22 - 03:54:22 7993
The Dalles 03:39:19 -8.5 NT Down 29.3 233.5 Low 03:24:19 - 03:54:19 7984
Pasco 03:39:23 -9.6 NT Down 27.8 235.2 Low 03:24:23 - 03:54:23 7976
PNWRO 03:39:23 -9.8 NT Down 27.8 235.5 Low 03:24:23 - 03:54:23 7945
Maupin 03:39:21 -8.8 NT Down 29.5 233.8 Low 03:24:21 - 03:54:21 7941
Sisters 03:39:19 -8.8 NT Down 30.3 233.7 Up 03:24:19 - 03:54:19 7874
Redmond 03:39:20 -9.1 NT Down 30.1 234.1 Up 03:24:20 - 03:54:20 7858
Bend 03:39:19 -9.1 NT Down 30.3 234.1 Up 03:24:19 - 03:54:19 7842
Oregon Observatory 03:39:19 -9.1 NT Down 30.5 234.1 Up 03:24:19 - 03:54:19 7830
La Pine/Gilchrist 03:39:19 -9.1 NT Down 30.6 234.1 Up 03:24:19 - 03:54:19 7813
North Lake 03:39:21 -9.7 NT Down 30.5 234.9 Up 03:24:21 - 03:54:21 7749
Chiloquin 03:39:18 -9.3 NT Down 31.5 234.3 Up 03:24:18 - 03:54:18 7720
Klamath Falls 03:39:16 -9.5 NT Down 31.7 234.5 Up 03:24:16 - 03:54:16 7684
Paisley 03:39:21 -10.2 NT Down 30.6 235.5 Up 03:24:21 - 03:54:21 7683
Lakeview 03:39:21 -10.5 NT Down 30.8 235.9 Up 03:24:21 - 03:54:21 7627
Cedarville 03:39:20 -10.9 NT Down 31.1 236.4 Up 03:24:20 - 03:54:20 7557
Fall River/Burney 03:39:18 -10.2 NT Down 32.1 235.5 Up 03:24:18 - 03:54:18 7556
Susanville 03:39:18 -11.0 NT Down 32.0 236.5 Up 03:24:18 - 03:54:18 7467
Greenville 03:39:18 -10.9 NT Down 32.3 236.4 Up 03:24:18 - 03:54:18 7451
Gimple 03:39:19 -11.0 NT Down 32.3 236.5 Up 03:24:19 - 03:54:19 7447
Quincy 03:39:16 -11.0 NT Down 32.4 236.5 Up 03:24:16 - 03:54:16 7431
Portola 03:39:19 -11.4 NT Down 32.2 237.0 Up 03:24:19 - 03:54:19 7401
Reno 03:39:22 -12.0 NT Down 31.9 237.7 Up 03:24:22 - 03:54:22 7350
Carson City 03:39:21 -12.1 AT Down 32.1 237.9 Up 03:24:21 - 03:54:21 7314
Gardnerville 03:39:22 -12.3 AT Down 32.2 238.1 Up 03:24:22 - 03:54:22 7288
Yerington 03:39:22 -12.7 AT Down 31.8 238.6 Up 03:24:22 - 03:54:22 7271
Hawthorne 03:39:22 -13.2 AT Down 31.6 239.3 Up 03:24:22 - 03:54:22 7205
Lee Vining 03:39:22 -13.1 AT Down 32.3 239.2 Up 03:24:22 - 03:54:22 7168
Tonopah 03:39:25 -14.4 AT Down 30.9 240.8 Up 03:24:25 - 03:54:25 7107
Bishop 03:39:22 -13.9 AT Down 32.1 240.2 Up 03:24:22 - 03:54:22 7081
Beatty 03:39:25 -15.3 AT Down 31.1 241.8 Up 03:24:25 - 03:54:25 6974
CPSLO 03:39:15 -13.0 AT Down 34.7 239.4 Up 03:24:15 - 03:54:15 6965
Dunrhomin 03:39:51 -21.4 Dark Down 21.4 249.5 Low 03:24:51 - 03:54:51 6951
Indian Springs 03:39:28 -16.2 AT Down 30.5 242.9 Up 03:24:28 - 03:54:28 6902
Henderson 03:39:29 -17.0 AT Down 30.3 243.7 Up 03:24:29 - 03:54:29 6822
Wildwood 03:39:18 -15.1 AT Down 33.8 241.8 Up 03:24:18 - 03:54:18 6763
Laughlin/Bullhead City 03:39:29 -17.6 AT Down 30.3 244.5 Up 03:24:29 - 03:54:29 6719
Patrick 03:39:32 -18.1 Dark Down 29.7 244.9 Low 03:24:32 - 03:54:32 6719
Kingman/Dolan Springs 03:39:33 -18.0 Dark Down 29.9 244.9 Low 03:24:33 - 03:54:33 6703
Mohave Valley 03:39:30 -17.8 AT Down 30.5 244.6 Up 03:24:30 - 03:54:30 6691
Idyllwild 03:39:23 -16.7 AT Down 32.6 243.6 Up 03:24:23 - 03:54:23 6654
Lake Havasu City 03:39:31 -18.1 Dark Down 30.4 245.0 Up 03:24:31 - 03:54:31 6642
Parker 03:39:29 -18.3 Dark Down 30.6 245.3 Up 03:24:29 - 03:54:29 6605
Blythe 03:39:27 -18.3 Dark Down 31.0 245.3 Up 03:24:27 - 03:54:27 6562
Calipatria 03:39:24 -17.8 AT Down 31.9 244.9 Up 03:24:24 - 03:54:24 6547
George/Scottsdale 03:39:36 -20.3 Dark Down 28.9 247.3 Low 03:24:36 - 03:54:36 6475
Yuma 03:39:28 -18.7 Dark Down 31.4 245.8 Up 03:24:28 - 03:54:28 6469

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 12YF12, (2023/04/17 03:41UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.74 100
34Del Ori      05:32:00.4 -00:17:57  2.2 11.16  93
PPM 176187     06:15:34.0 -00:30:49  6.2  0.35 104
12YF12         06:16:37.5 -00:44:17 16.5       104
Positions are for J2000

Event circumstances last updated at 2021/12/18 02:00:17 UT

Marc W. Buie, Southwest Research Institute

RECON