RECON: TNO occultation with 12LB27

Event between 12LB27 and star GA0980:17635241 with event index number of 2429102

Geocentric closest approach at 2022/08/01 05:02:34 UTC

J2000 position of star is 20:50:08.8 +09:36:07
Equinox of date position of star is 20:51:12.0 +09:41:03
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 138 degrees from the moon. Moon is 11% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 15.7 AU from the Sun and 14.8 AU from the Earth.
The TNO is moving 20.8 km/sec on the sky relative to the star, or, 7.0 arcsec/hr.
The 1-sigma error in the time of the event is 73 seconds.
The 1-sigma cross-track error in the shadow position is 734 km.
The sky-plane scale is 10760.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.7
Diameter=70.5 km assuming a 5% albedo -- 3.3 sec chord
Diameter=28.8 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 12LB27, (2022/08/01 05:02UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:42.2 +38:48:21  0.0 41.68  99
Tarazed        19:47:20.0 +10:40:11  2.7 15.75 123
PPM 171106     21:01:10.7 +07:36:20  6.3  3.22 141
PPM 170719     20:48:35.6 +09:56:55  8.2  0.70 137
PPM 170838     20:52:31.9 +09:42:17  9.0  0.32 138
PPM 170790     20:50:52.8 +09:41:00 10.4  0.09 138
12LB27         20:51:14.4 +09:41:14 16.9       138
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 5.0 sigma about the mid-time.
The median site spacing is 24.3 km RECON observability=0.6 and success probability=0.0%
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 05:03:57 -11.1 NT Up 34.5 120.6 Up 04:57:20 - 05:10:34 6266
Victoria 05:04:12 -10.5 NT Up 32.9 115.7 Up 04:57:35 - 05:10:49 6247
Kelowna 05:03:58 -11.3 NT Up 34.6 120.2 Up 04:57:21 - 05:10:35 6246
Peachland 05:04:00 -11.3 NT Up 34.5 119.8 Up 04:57:23 - 05:10:37 6245
Summerland 05:04:00 -11.4 NT Up 34.6 119.8 Up 04:57:23 - 05:10:37 6234
Penticton 05:04:00 -11.5 NT Up 34.7 119.9 Up 04:57:23 - 05:10:37 6228
Oliver 05:04:01 -11.8 NT Up 34.9 119.7 Up 04:57:24 - 05:10:38 6205
Anarchist Mountain Observatory 05:04:01 -12.0 AT Up 35.1 119.8 Up 04:57:24 - 05:10:38 6191
Tonasket 05:04:03 -12.2 AT Up 35.2 119.5 Up 04:57:26 - 05:10:40 6173
Okanogan 05:04:04 -12.4 AT Up 35.3 119.2 Up 04:57:27 - 05:10:41 6154
Brewster 05:04:06 -12.5 AT Up 35.3 118.8 Up 04:57:29 - 05:10:43 6141
Manson/Chelan 05:04:08 -12.5 AT Up 35.2 118.3 Up 04:57:31 - 05:10:45 6136
Wenatchee 05:04:10 -12.7 AT Up 35.3 117.9 Up 04:57:33 - 05:10:47 6109
Ellensburg 05:04:12 -12.9 AT Up 35.4 117.4 Up 04:57:35 - 05:10:49 6087
Yakima 05:04:14 -13.2 AT Up 35.5 117.2 Up 04:57:37 - 05:10:51 6061
Toppenish/White Swan 05:04:14 -13.4 AT Up 35.7 117.2 Up 04:57:37 - 05:10:51 6042
Goldendale 05:04:17 -13.6 AT Up 35.7 116.4 Up 04:57:40 - 05:10:54 6015
The Dalles 05:04:19 -13.6 AT Up 35.6 116.0 Up 04:57:42 - 05:10:56 6008
Pasco 05:04:11 -14.1 AT Up 36.6 118.3 Up 04:57:34 - 05:10:48 6005
PNWRO 05:04:12 -14.4 AT Up 36.8 118.4 Up 04:57:35 - 05:10:49 5983
Maupin 05:04:20 -14.0 AT Up 35.9 115.8 Up 04:57:43 - 05:10:57 5978
Sisters 05:04:24 -14.3 AT Up 35.9 114.8 Up 04:57:47 - 05:11:01 5929
Redmond 05:04:24 -14.6 AT Up 36.2 115.1 Up 04:57:47 - 05:11:01 5918
Bend 05:04:24 -14.6 AT Up 36.2 114.9 Up 04:57:47 - 05:11:01 5907
Oregon Observatory 05:04:26 -14.7 AT Up 36.2 114.6 Up 04:57:49 - 05:11:03 5898
La Pine/Gilchrist 05:04:27 -14.8 AT Up 36.2 114.4 Up 04:57:50 - 05:11:04 5885
North Lake 05:04:27 -15.4 AT Up 36.8 114.7 Up 04:57:50 - 05:11:04 5840
Chiloquin 05:04:31 -15.4 AT Up 36.5 113.4 Up 04:57:54 - 05:11:08 5815
Paisley 05:04:27 -16.0 AT Up 37.3 114.7 Up 04:57:50 - 05:11:04 5792
Klamath Falls 05:04:33 -15.7 AT Up 36.7 113.2 Up 04:57:56 - 05:11:10 5788
Lakeview 05:04:30 -16.5 AT Up 37.6 114.5 Up 04:57:53 - 05:11:07 5751
Cedarville 05:04:32 -17.0 AT Up 38.0 114.2 Up 04:57:55 - 05:11:09 5699
Fall River/Burney 05:04:36 -16.7 AT Up 37.4 112.8 Up 04:57:59 - 05:11:13 5693
Susanville 05:04:37 -17.6 AT Up 38.2 113.0 Up 04:58:00 - 05:11:14 5628
Greenville 05:04:38 -17.6 AT Up 38.1 112.5 Up 04:58:01 - 05:11:15 5615
Gimple 05:04:38 -17.6 AT Up 38.1 112.6 Up 04:58:01 - 05:11:15 5612
Quincy 05:04:39 -17.7 AT Up 38.1 112.4 Up 04:58:02 - 05:11:16 5599
Portola 05:04:38 -18.1 Dark Up 38.5 112.7 Up 04:58:01 - 05:11:15 5578
Reno 05:04:38 -18.6 Dark Up 39.1 113.1 Up 04:58:01 - 05:11:15 5541
Carson City 05:04:39 -18.9 Dark Up 39.2 112.8 Up 04:58:02 - 05:11:16 5513
Gardnerville 05:04:40 -19.1 Dark Up 39.4 112.7 Up 04:58:03 - 05:11:17 5493
Yerington 05:04:38 -19.4 Dark Up 39.8 113.2 Up 04:58:01 - 05:11:15 5482
Hawthorne 05:04:38 -20.0 Dark Up 40.3 113.4 Up 04:58:01 - 05:11:15 5432
Lee Vining 05:04:41 -20.1 Dark Up 40.2 112.5 Up 04:58:04 - 05:11:18 5401
Tonopah 05:04:36 -21.1 Dark Down 41.5 114.2 Up 04:57:59 - 05:11:13 5359
Bishop 05:04:41 -21.0 Dark Down 41.0 112.7 Up 04:58:04 - 05:11:18 5335
Beatty 05:04:38 -22.2 Dark Down 42.3 113.7 Up 04:58:01 - 05:11:15 5254
CPSLO 05:04:54 -21.1 Dark Up 40.0 109.2 Up 04:58:17 - 05:11:31 5229
Dunrhomin 05:03:53 -25.1 Dark Down 48.3 128.4 Up 04:57:16 - 05:10:30 5219
Indian Springs 05:04:37 -23.0 Dark Down 43.3 114.4 Up 04:58:00 - 05:11:14 5199
Henderson 05:04:35 -23.8 Dark Down 44.0 114.6 Up 04:57:58 - 05:11:12 5136
Wildwood 05:04:52 -23.2 Dark Down 42.0 109.8 Up 04:58:15 - 05:11:29 5074
Patrick 05:04:35 -24.9 Dark Down 45.1 115.0 Up 04:57:58 - 05:11:12 5054
Laughlin/Bullhead City 05:04:37 -24.7 Dark Down 44.7 114.2 Up 04:58:00 - 05:11:14 5053
Kingman/Dolan Springs 05:04:36 -24.9 Dark Down 45.0 114.7 Up 04:57:59 - 05:11:13 5041
Mohave Valley 05:04:38 -24.9 Dark Down 44.8 113.9 Up 04:58:01 - 05:11:15 5030
Idyllwild 05:04:48 -24.5 Dark Down 43.6 111.1 Up 04:58:11 - 05:11:25 4993
Lake Havasu City 05:04:39 -25.3 Dark Down 45.1 113.8 Up 04:58:02 - 05:11:16 4989
Parker 05:04:40 -25.6 Dark Down 45.3 113.5 Up 04:58:03 - 05:11:17 4959
Blythe 05:04:42 -25.8 Dark Down 45.3 112.8 Up 04:58:05 - 05:11:19 4923
Calipatria 05:04:47 -25.6 Dark Down 44.8 111.5 Up 04:58:10 - 05:11:24 4907
George/Scottsdale 05:04:34 -27.2 Dark Down 47.3 115.3 Up 04:57:57 - 05:11:11 4855
Yuma 05:04:46 -26.5 Dark Down 45.6 111.9 Up 04:58:09 - 05:11:23 4845

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 12LB27, (2022/08/01 05:02UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 41.68  99
Tarazed        19:46:15.6 +10:36:48  2.7 15.75 123
PPM 171106     21:00:04.0 +07:30:59  6.3  3.22 141
PPM 170719     20:47:30.0 +09:51:53  8.2  0.70 137
PPM 170838     20:51:26.3 +09:37:09  9.0  0.32 138
PPM 170790     20:49:47.1 +09:35:54 10.4  0.09 138
12LB27         20:50:08.8 +09:36:07 16.9       138
Positions are for J2000

Event circumstances last updated at 2021/10/04 01:53:29 UT

Marc W. Buie, Southwest Research Institute

RECON