RECON: TNO occultation with 12HE85

Event between 12HE85 and star GA0700:33577900 with event index number of 1317105

Geocentric closest approach at 2023/07/08 08:16:21 UTC

J2000 position of star is 19:42:45.5 -18:38:44
Equinox of date position of star is 19:43:55.8 -18:35:47
Stellar brightness G=15.9, use SENSEUP=128
Star is 59 degrees from the moon. Moon is 69% illuminated.
TNO apparent brightness V=26.0

[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 5755 km.
The sky-plane scale is 28578.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=93.8 km assuming a 5% albedo -- 2.5 sec chord
Diameter=38.3 km assuming a 30% albedo -- 1.0 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 12.7 km RECON observability=1.0 and success probability=3.3%
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 08:15:58 -17.2 AT Up 21.0 175.0 Low 08:00:58 - 08:30:58 7840
Kelowna 08:15:59 -17.6 AT Up 21.3 174.8 Low 08:00:59 - 08:30:59 7826
Peachland 08:15:59 -17.7 AT Up 21.4 174.5 Low 08:00:59 - 08:30:59 7824
Summerland 08:16:00 -17.9 AT Up 21.6 174.6 Low 08:01:00 - 08:31:00 7818
Penticton 08:15:58 -17.9 AT Up 21.7 174.7 Low 08:00:58 - 08:30:58 7814
Victoria 08:16:11 -19.0 Dark Up 22.4 170.7 Low 08:01:11 - 08:31:11 7806
Oliver 08:15:59 -18.3 Dark Up 22.0 174.7 Low 08:00:59 - 08:30:59 7800
Anarchist Mountain Observatory 08:15:59 -18.4 Dark Up 22.2 174.9 Low 08:00:59 - 08:30:59 7792
Tonasket 08:16:00 -18.8 Dark Up 22.5 174.8 Low 08:01:00 - 08:31:00 7779
Okanogan 08:16:00 -19.1 Dark Up 22.8 174.6 Low 08:01:00 - 08:31:00 7766
Brewster 08:16:00 -19.4 Dark Up 23.1 174.4 Low 08:01:00 - 08:31:00 7757
Manson/Chelan 08:16:02 -19.6 Dark Up 23.3 174.0 Low 08:01:02 - 08:31:02 7752
Entiat 08:16:03 -19.8 Dark Up 23.5 173.9 Low 08:01:03 - 08:31:03 7743
Wenatchee 08:16:03 -20.1 Dark Up 23.7 173.8 Low 08:01:03 - 08:31:03 7733
Ellensburg 08:16:04 -20.5 Dark Up 24.1 173.6 Low 08:01:04 - 08:31:04 7717
Yakima 08:16:04 -20.9 Dark Up 24.5 173.5 Low 08:01:04 - 08:31:04 7699
Toppenish/White Swan 08:16:04 -21.1 Dark Up 24.8 173.7 Low 08:01:04 - 08:31:04 7687
Pasco 08:16:00 -21.2 Dark Up 25.0 175.0 Low 08:01:00 - 08:31:00 7669
Goldendale 08:16:06 -21.7 Dark Up 25.3 173.2 Low 08:01:06 - 08:31:06 7666
The Dalles 08:16:07 -21.9 Dark Up 25.5 172.8 Low 08:01:07 - 08:31:07 7659
PNWRO 08:15:59 -21.4 Dark Up 25.2 175.2 Low 08:00:59 - 08:30:59 7656
Maupin 08:16:07 -22.3 Dark Up 25.9 172.9 Low 08:01:07 - 08:31:07 7639
Sisters 08:16:09 -23.2 Dark Up 26.7 172.4 Low 08:01:09 - 08:31:09 7602
Redmond 08:16:08 -23.2 Dark Up 26.8 172.8 Low 08:01:08 - 08:31:08 7597
Bend 08:16:08 -23.4 Dark Up 27.0 172.6 Low 08:01:08 - 08:31:08 7588
Oregon Observatory 08:16:09 -23.6 Dark Up 27.1 172.5 Low 08:01:09 - 08:31:09 7581
La Pine/Gilchrist 08:16:09 -23.8 Dark Up 27.3 172.4 Low 08:01:09 - 08:31:09 7571
North Lake 08:16:08 -24.2 Dark Up 27.8 173.0 Low 08:01:08 - 08:31:08 7544
Paisley 08:16:07 -24.8 Dark Up 28.4 173.4 Low 08:01:07 - 08:31:07 7512
Klamath Falls 08:16:11 -25.3 Dark Up 28.7 172.0 Low 08:01:11 - 08:31:11 7500
Lakeview 08:16:06 -25.3 Dark Up 28.9 173.5 Low 08:01:06 - 08:31:06 7484
Cedarville 08:16:05 -25.9 Dark Up 29.6 173.7 Low 08:01:05 - 08:31:05 7447
Fall River/Burney 08:16:11 -26.5 Dark Up 30.0 172.3 Low 08:01:11 - 08:31:11 7433
Susanville 08:16:09 -27.1 Dark Up 30.7 173.1 Up 08:01:09 - 08:31:09 7391
Greenville 08:16:09 -27.4 Dark Up 30.9 172.7 Up 08:01:09 - 08:31:09 7379
Gimple 08:16:09 -27.4 Dark Up 30.9 172.8 Up 08:01:09 - 08:31:09 7378
Quincy 08:16:10 -27.6 Dark Up 31.1 172.7 Up 08:01:10 - 08:31:10 7367
Portola 08:16:09 -27.7 Dark Up 31.3 173.2 Up 08:01:09 - 08:31:09 7356
Reno 08:16:06 -27.9 Dark Up 31.6 173.9 Up 08:01:06 - 08:31:06 7334
Carson City 08:16:06 -28.3 Dark Up 31.9 173.9 Up 08:01:06 - 08:31:06 7313
Gardnerville 08:16:07 -28.5 Dark Up 32.2 174.0 Up 08:01:07 - 08:31:07 7298
Yerington 08:16:05 -28.4 Dark Up 32.2 174.6 Up 08:01:05 - 08:31:05 7295
Hawthorne 08:16:03 -28.9 Dark Up 32.7 175.2 Up 08:01:03 - 08:31:03 7261
Lee Vining 08:16:05 -29.5 Dark Up 33.2 174.6 Up 08:01:05 - 08:31:05 7234
Tonopah 08:15:59 -29.2 Dark Up 33.2 176.7 Up 08:00:59 - 08:30:59 7217
Bishop 08:16:03 -30.0 Dark Up 33.9 175.4 Up 08:01:03 - 08:31:03 7189
Niwot 08:15:16 -25.3 Dark Up 30.7 189.9 Up 08:00:16 - 08:30:16 7159
SwRI 08:15:16 -25.5 Dark Up 30.8 189.8 Up 08:00:16 - 08:30:16 7154
Beatty 08:15:58 -30.3 Dark Up 34.4 177.2 Up 08:00:58 - 08:30:58 7141
Indian Springs 08:15:54 -30.6 Dark Up 34.8 178.4 Up 08:00:54 - 08:30:54 7106
CPSLO 08:16:13 -32.2 Dark Up 35.7 172.7 Up 08:01:13 - 08:31:13 7087
Henderson 08:15:52 -31.0 Dark Up 35.3 179.2 Up 08:00:52 - 08:30:52 7063
Searchlight/Boulder City 08:15:52 -31.6 Dark Up 35.9 179.3 Up 08:00:52 - 08:30:52 7026
Patrick 08:15:48 -31.5 Dark Up 35.9 180.5 Up 08:00:48 - 08:30:48 7007
Laughlin/Bullhead City 08:15:50 -31.8 Dark Up 36.2 179.7 Up 08:00:50 - 08:30:50 7001
Kingman/Dolan Springs 08:15:49 -31.7 Dark Up 36.2 180.3 Up 08:00:49 - 08:30:49 6996
Wildwood 08:16:05 -33.3 Dark Up 37.1 175.0 Up 08:01:05 - 08:31:05 6985
Mohave Valley 08:15:50 -32.1 Dark Up 36.5 179.7 Up 08:00:50 - 08:30:50 6983
DCO 08:15:45 -31.7 Dark Up 36.2 181.3 Up 08:00:45 - 08:30:45 6977
Lake Havasu City 08:15:50 -32.5 Dark Up 36.9 180.0 Up 08:00:50 - 08:30:50 6954
Idyllwild 08:15:59 -33.5 Dark Up 37.6 177.2 Up 08:00:59 - 08:30:59 6938
Parker 08:15:50 -32.8 Dark Up 37.2 180.0 Up 08:00:50 - 08:30:50 6930
Blythe 08:15:51 -33.4 Dark Up 37.7 179.7 Up 08:00:51 - 08:30:51 6899
Calipatria 08:15:55 -34.0 Dark Up 38.2 178.5 Up 08:00:55 - 08:30:55 6879
George/Scottsdale 08:15:41 -32.9 Dark Up 37.6 182.9 Up 08:00:41 - 08:30:41 6865
Yuma 08:15:52 -34.3 Dark Up 38.7 179.6 Up 08:00:52 - 08:30:52 6837

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 2020/03/20 20:51:11 UT

Marc W. Buie, Southwest Research Institute

RECON