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 19:43:53.1 -18:35:54
Stellar brightness G=15.9, use SENSEUP=128
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 5754 km.
The sky-plane scale is 28578.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.0
Diameter=93.8 km assuming a 5% albedo -- 3.9 sec chord
Diameter=38.3 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 12.1 km RECON observability=1.0 and success probability=3.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:15:59 -17.6 AT Up 21.3 174.9 Low 08:00:59 - 08:30:59 7826
Summerland 08:15:59 -17.9 AT Up 21.6 174.6 Low 08:00:59 - 08:30:59 7817
Penticton 08:15:58 -17.9 AT Up 21.7 174.7 Low 08:00:58 - 08:30:58 7814
Okanagan Falls 08:15:59 -18.1 Dark Up 21.9 174.7 Low 08:00:59 - 08:30:59 7806
Oliver 08:15:59 -18.3 Dark Up 22.0 174.7 Low 08:00:59 - 08:30:59 7799
Anarchist Mountain Observatory 08:15:59 -18.4 Dark Up 22.2 174.9 Low 08:00:59 - 08:30:59 7791
Oroville 08:16:00 -18.5 Dark Up 22.3 174.8 Low 08:01:00 - 08:31:00 7788
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 7751
Entiat 08:16:03 -19.8 Dark Up 23.5 173.9 Low 08:01:03 - 08:31:03 7742
Wenatchee 08:16:03 -20.1 Dark Up 23.7 173.8 Low 08:01:03 - 08:31:03 7732
Ellensburg 08:16:04 -20.5 Dark Up 24.1 173.6 Low 08:01:04 - 08:31:04 7716
Yakima 08:16:04 -20.9 Dark Up 24.5 173.5 Low 08:01:04 - 08:31:04 7698
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
George/Umatilla 08:16:01 -21.5 Dark Up 25.3 174.8 Low 08:01:01 - 08:31:01 7656
PNWRO 08:16:00 -21.4 Dark Up 25.2 175.2 Low 08:01:00 - 08:31:00 7656
Maupin 08:16:07 -22.3 Dark Up 25.9 172.9 Low 08:01:07 - 08:31:07 7638
Madras/Culver 08:16:08 -22.9 Dark Up 26.4 172.9 Low 08:01:08 - 08:31:08 7613
Sisters 08:16:09 -23.2 Dark Up 26.7 172.4 Low 08:01:09 - 08:31:09 7601
Redmond 08:16:08 -23.2 Dark Up 26.8 172.8 Low 08:01:08 - 08:31:08 7596
Bend 08:16:09 -23.4 Dark Up 27.0 172.6 Low 08:01:09 - 08:31:09 7587
Oregon Observatory 08:16:09 -23.6 Dark Up 27.1 172.5 Low 08:01:09 - 08:31:09 7580
La Pine/Gilchrist 08:16:09 -23.8 Dark Up 27.3 172.4 Low 08:01:09 - 08:31:09 7570
North Lake 08:16:08 -24.2 Dark Up 27.8 173.0 Low 08:01:08 - 08:31:08 7542
Chiloquin 08:16:12 -24.9 Dark Up 28.4 171.9 Low 08:01:12 - 08:31:12 7517
Paisley 08:16:07 -24.8 Dark Up 28.4 173.4 Low 08:01:07 - 08:31:07 7511
Klamath Falls 08:16:11 -25.3 Dark Up 28.7 172.0 Low 08:01:11 - 08:31:11 7498
Lakeview 08:16:07 -25.3 Dark Up 28.9 173.5 Low 08:01:07 - 08:31:07 7482
Tulelake 08:16:10 -25.5 Dark Up 29.0 172.3 Low 08:01:10 - 08:31:10 7482
Cedarville 08:16:06 -25.9 Dark Up 29.6 173.7 Low 08:01:06 - 08:31:06 7446
Fall River/Burney 08:16:11 -26.5 Dark Up 30.0 172.3 Low 08:01:11 - 08:31:11 7432
Susanville 08:16:09 -27.1 Dark Up 30.7 173.1 Up 08:01:09 - 08:31:09 7390
Greenville 08:16:10 -27.4 Dark Up 30.9 172.7 Up 08:01:10 - 08:31:10 7378
Gimple 08:16:10 -27.4 Dark Up 30.9 172.8 Up 08:01:10 - 08:31:10 7377
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 7355
Reno 08:16:07 -27.9 Dark Up 31.6 173.9 Up 08:01:07 - 08:31:07 7332
Carson City 08:16:07 -28.3 Dark Up 31.9 173.9 Up 08:01:07 - 08:31:07 7312
Gardnerville 08:16:06 -28.5 Dark Up 32.2 174.0 Up 08:01:06 - 08:31:06 7297
Yerington 08:16:05 -28.4 Dark Up 32.2 174.6 Up 08:01:05 - 08:31:05 7293
Hawthorne 08:16:02 -28.9 Dark Up 32.7 175.2 Up 08:01:02 - 08:31:02 7260
Lee Vining 08:16:05 -29.5 Dark Up 33.2 174.6 Up 08:01:05 - 08:31:05 7233
Tonopah 08:15:58 -29.2 Dark Up 33.2 176.7 Up 08:00:58 - 08:30:58 7216
Bishop 08:16:03 -30.0 Dark Up 33.9 175.4 Up 08:01:03 - 08:31:03 7188
Niwot 08:15:17 -25.3 Dark Up 30.7 189.9 Up 08:00:17 - 08:30:17 7157
SwRI 08:15:17 -25.5 Dark Up 30.8 189.8 Up 08:00:17 - 08:30:17 7153
Beatty 08:15:58 -30.3 Dark Up 34.4 177.2 Up 08:00:58 - 08:30:58 7140
Lone Pine 08:16:02 -30.7 Dark Up 34.6 175.7 Up 08:01:02 - 08:31:02 7138
Indian Springs 08:15:54 -30.6 Dark Up 34.8 178.4 Up 08:00:54 - 08:30:54 7105
CPSLO 08:16:12 -32.2 Dark Up 35.7 172.7 Up 08:01:12 - 08:31:12 7086
Henderson 08:15:51 -31.0 Dark Up 35.3 179.2 Up 08:00:51 - 08:30:51 7062
Searchlight/Boulder City 08:15:52 -31.6 Dark Up 35.9 179.3 Up 08:00:52 - 08:30:52 7025
Patrick 08:15:48 -31.5 Dark Up 35.9 180.5 Up 08:00:48 - 08:30:48 7006
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 6995
Wildwood 08:16:06 -33.3 Dark Up 37.1 175.0 Up 08:01:06 - 08:31:06 6984
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 6976
Lake Havasu City 08:15:50 -32.5 Dark Up 36.9 180.0 Up 08:00:50 - 08:30:50 6953
Idyllwild 08:15:59 -33.5 Dark Up 37.6 177.2 Up 08:00:59 - 08:30:59 6936
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
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 2019/06/08 05:34:20 UT

Marc W. Buie, Southwest Research Institute

RECON