RECON: TNO occultation with 12HE85

Event between 12HE85 and star GA0700:38062579 with event index number of 2825287

Geocentric closest approach at 2023/07/08 08:16:26 UTC

J2000 position of star is 19:42:45.5 -18:38:44
Equinox of date position of star is 19:44:04.7 -18:35:25
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 69% illuminated.
TNO apparent brightness V=25.0

[RECON map]
TNO is 40.4 AU from the Sun and 39.4 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 810 seconds.
The 1-sigma cross-track error in the shadow position is 5714 km.
The sky-plane scale is 28578.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.0
Diameter=96.8 km assuming a 5% albedo -- 4.0 sec chord
Diameter=39.5 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is 9:5EEEE
 
 
 
 
 
 

Star training set for 12HE85, (2023/07/08 08:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.2 -26:28:56  0.9 45.06 103
Nunki          18:56:43.3 -26:15:55  2.0 13.36  71
PPM 236251     19:38:25.1 -18:10:37  5.7  1.41  61
PPM 236394     19:44:34.4 -19:03:17  8.5  0.48  59
PPM 236387     19:44:19.2 -18:28:33  9.4  0.12  59
12HE85         19:44:07.3 -18:35:18 15.9        59
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 1.1 sigma about the mid-time.
The median site spacing is 14.2 km RECON observability=1.0 and success probability=3.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:16:05 -16.8 AT Up 20.5 173.9 Low 08:01:05 - 08:31:05 7717
Kelowna 08:16:02 -17.6 AT Up 21.3 174.8 Low 08:01:02 - 08:31:02 7678
Peachland 08:16:03 -17.7 AT Up 21.4 174.5 Low 08:01:03 - 08:31:03 7676
Summerland 08:16:03 -17.9 AT Up 21.6 174.6 Low 08:01:03 - 08:31:03 7669
Penticton 08:16:03 -17.9 AT Up 21.7 174.7 Low 08:01:03 - 08:31:03 7666
Victoria 08:16:15 -19.0 Dark Up 22.4 170.8 Low 08:01:15 - 08:31:15 7658
Oliver 08:16:03 -18.3 Dark Up 22.0 174.7 Low 08:01:03 - 08:31:03 7651
Anarchist Mountain Observatory 08:16:02 -18.4 Dark Up 22.2 174.9 Low 08:01:02 - 08:31:02 7643
Tonasket 08:16:03 -18.8 Dark Up 22.5 174.8 Low 08:01:03 - 08:31:03 7631
Okanogan 08:16:04 -19.1 Dark Up 22.8 174.6 Low 08:01:04 - 08:31:04 7618
Brewster 08:16:05 -19.4 Dark Up 23.1 174.4 Low 08:01:05 - 08:31:05 7609
Sleaford 08:15:24 -14.0 AT Up 18.9 188.3 Really Low 08:00:24 - 08:30:24 7607
Manson/Chelan 08:16:06 -19.6 Dark Up 23.3 174.0 Low 08:01:06 - 08:31:06 7603
Wenatchee 08:16:06 -20.1 Dark Up 23.7 173.8 Low 08:01:06 - 08:31:06 7584
Ellensburg 08:16:07 -20.5 Dark Up 24.1 173.6 Low 08:01:07 - 08:31:07 7569
Yakima 08:16:07 -20.9 Dark Up 24.5 173.6 Low 08:01:07 - 08:31:07 7551
Toppenish/White Swan 08:16:07 -21.1 Dark Up 24.8 173.7 Low 08:01:07 - 08:31:07 7539
Goldendale 08:16:09 -21.7 Dark Up 25.3 173.2 Low 08:01:09 - 08:31:09 7518
The Dalles 08:16:10 -21.9 Dark Up 25.5 172.9 Low 08:01:10 - 08:31:10 7511
PNWRO 08:16:03 -21.4 Dark Up 25.2 175.2 Low 08:01:03 - 08:31:03 7508
Maupin 08:16:11 -22.3 Dark Up 25.9 172.9 Low 08:01:11 - 08:31:11 7491
Sisters 08:16:13 -23.2 Dark Up 26.7 172.4 Low 08:01:13 - 08:31:13 7454
Bend 08:16:12 -23.4 Dark Up 27.0 172.6 Low 08:01:12 - 08:31:12 7440
Oregon Observatory 08:16:13 -23.6 Dark Up 27.1 172.5 Low 08:01:13 - 08:31:13 7432
North Lake 08:16:11 -24.2 Dark Up 27.8 173.0 Low 08:01:11 - 08:31:11 7395
Chiloquin 08:16:15 -24.9 Dark Up 28.4 172.0 Low 08:01:15 - 08:31:15 7370
Klamath Falls 08:16:15 -25.3 Dark Up 28.7 172.0 Low 08:01:15 - 08:31:15 7351
Lakeview 08:16:10 -25.3 Dark Up 28.9 173.5 Low 08:01:10 - 08:31:10 7335
Cedarville 08:16:10 -25.9 Dark Up 29.6 173.7 Low 08:01:10 - 08:31:10 7299
Fall River/Burney 08:16:14 -26.5 Dark Up 30.0 172.3 Low 08:01:14 - 08:31:14 7285
Susanville 08:16:12 -27.1 Dark Up 30.7 173.1 Up 08:01:12 - 08:31:12 7243
Greenville 08:16:13 -27.4 Dark Up 30.9 172.8 Up 08:01:13 - 08:31:13 7231
Gimple 08:16:14 -27.4 Dark Up 30.9 172.9 Up 08:01:14 - 08:31:14 7230
Quincy 08:16:13 -27.6 Dark Up 31.1 172.8 Up 08:01:13 - 08:31:13 7219
Portola 08:16:12 -27.7 Dark Up 31.3 173.3 Up 08:01:12 - 08:31:12 7208
Reno 08:16:10 -27.9 Dark Up 31.6 174.0 Up 08:01:10 - 08:31:10 7185
Carson City 08:16:10 -28.3 Dark Up 31.9 174.0 Up 08:01:10 - 08:31:10 7165
Gardnerville 08:16:09 -28.5 Dark Up 32.2 174.0 Up 08:01:09 - 08:31:09 7150
Yerington 08:16:08 -28.4 Dark Up 32.2 174.6 Up 08:01:08 - 08:31:08 7146
Hawthorne 08:16:06 -28.9 Dark Up 32.7 175.2 Up 08:01:06 - 08:31:06 7113
Lee Vining 08:16:09 -29.5 Dark Up 33.2 174.6 Up 08:01:09 - 08:31:09 7086
Tonopah 08:16:02 -29.2 Dark Up 33.2 176.8 Up 08:01:02 - 08:31:02 7069
Bishop 08:16:07 -30.0 Dark Up 33.9 175.4 Up 08:01:07 - 08:31:07 7041
Dunrhomin 08:15:20 -25.2 Dark Up 30.5 189.9 Up 08:00:20 - 08:30:20 7018
CU-SBO 08:15:20 -25.5 Dark Up 30.8 189.8 Up 08:00:20 - 08:30:20 7006
Beatty 08:16:01 -30.3 Dark Up 34.4 177.2 Up 08:01:01 - 08:31:01 6992
Indian Springs 08:15:57 -30.6 Dark Up 34.8 178.4 Up 08:00:57 - 08:30:57 6958
Henderson 08:15:55 -31.0 Dark Up 35.3 179.2 Up 08:00:55 - 08:30:55 6915
Patrick 08:15:51 -31.5 Dark Up 35.9 180.5 Up 08:00:51 - 08:30:51 6859
Laughlin/Bullhead City 08:15:54 -31.8 Dark Up 36.2 179.7 Up 08:00:54 - 08:30:54 6853
Kingman/Dolan Springs 08:15:52 -31.7 Dark Up 36.2 180.3 Up 08:00:52 - 08:30:52 6847
Wildwood 08:16:09 -33.3 Dark Up 37.1 175.0 Up 08:01:09 - 08:31:09 6836
Mohave Valley 08:15:54 -32.1 Dark Up 36.5 179.7 Up 08:00:54 - 08:30:54 6835
Lake Havasu City 08:15:53 -32.5 Dark Up 36.9 180.0 Up 08:00:53 - 08:30:53 6805
Idyllwild 08:16:03 -33.5 Dark Up 37.6 177.2 Up 08:01:03 - 08:31:03 6789
Parker 08:15:54 -32.8 Dark Up 37.2 180.0 Up 08:00:54 - 08:30:54 6782
Calipatria 08:15:59 -34.0 Dark Up 38.2 178.6 Up 08:00:59 - 08:30:59 6731
George/Scottsdale 08:15:45 -32.9 Dark Up 37.6 182.9 Up 08:00:45 - 08:30:45 6717
Yuma 08:15:55 -34.3 Dark Up 38.7 179.6 Up 08:00:55 - 08:30:55 6689

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 12HE85, (2023/07/08 08:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 45.06 103
Nunki          18:55:15.9 -26:17:49  2.0 13.36  71
PPM 236251     19:37:03.4 -18:13:52  5.7  1.41  61
PPM 236394     19:43:12.3 -19:06:44  8.5  0.48  59
PPM 236387     19:42:57.4 -18:31:59  9.4  0.12  59
12HE85         19:42:45.5 -18:38:44 15.9        59
Positions are for J2000

Event circumstances last updated at 2022/10/05 04:14:23 UT

Marc W. Buie, Southwest Research Institute

RECON