RECON: TNO occultation with 12HL85

Event between 12HL85 and star GA0740:05279927 with event index number of 249223

Geocentric closest approach at 2019/06/05 08:05:26 UTC

J2000 position of star is 14:49:30.4 -15:32:35
Equinox of date position of star is 14:50:34.0 -15:37:18
Stellar brightness G=16.1, use SENSEUP=128
Star is 125 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 41.1 AU from the Sun and 40.2 AU from the Earth.
The TNO is moving 21.3 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 124 seconds.
The 1-sigma cross-track error in the shadow position is 2111 km.
The sky-plane scale is 29135.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=296.5 km assuming a 5% albedo -- 13.9 sec chord
Diameter=121.0 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12HL85, (2019/06/05 08:05UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.2 -11:15:44  1.0 20.96 105
27Bet Lib      15:18:03.3 -09:27:12  2.6  9.11 130
8Alp1Lib       14:51:45.9 -16:04:37  5.1  0.54 126
PPM 229351     14:51:11.0 -15:36:20  7.2  0.15 126
12HL85         14:50:35.0 -15:37:22 16.1       126
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 12.5 km RECON observability=0.8 and success probability=1.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:04:44 -17.6 AT Down 18.4 213.5 Really Low 07:53:53 - 08:15:35 6933
Summerland 08:04:45 -17.6 AT Down 18.6 213.1 Really Low 07:53:54 - 08:15:36 6930
Penticton 08:04:43 -17.9 AT Down 18.8 213.4 Really Low 07:53:52 - 08:15:34 6919
Okanagan Falls 08:04:43 -18.1 Dark Down 19.0 213.4 Really Low 07:53:52 - 08:15:34 6911
Oliver 08:04:43 -18.3 Dark Down 19.1 213.4 Really Low 07:53:52 - 08:15:34 6905
Anarchist Mountain Observatory 08:04:42 -18.4 Dark Down 19.2 213.6 Really Low 07:53:51 - 08:15:33 6899
Oroville 08:04:42 -18.5 Dark Down 19.3 213.6 Really Low 07:53:51 - 08:15:33 6896
Tonasket 08:04:41 -18.7 Dark Down 19.5 213.6 Really Low 07:53:50 - 08:15:32 6886
Okanogan 08:04:40 -19.1 Dark Down 19.8 213.6 Really Low 07:53:49 - 08:15:31 6872
Brewster 08:04:40 -19.4 Dark Down 20.1 213.4 Low 07:53:49 - 08:15:31 6860
Manson/Chelan 08:04:41 -19.6 Dark Down 20.4 213.1 Low 07:53:50 - 08:15:32 6850
Entiat 08:04:41 -19.8 Dark Down 20.6 213.1 Low 07:53:50 - 08:15:32 6841
Wenatchee 08:04:41 -20.1 Dark Down 20.9 213.0 Low 07:53:50 - 08:15:32 6829
Ellensburg 08:04:41 -20.5 Dark Down 21.3 212.9 Low 07:53:50 - 08:15:32 6811
Yakima 08:04:40 -20.9 Dark Down 21.6 213.0 Low 07:53:49 - 08:15:31 6793
Toppenish/White Swan 08:04:39 -21.1 Dark Down 21.8 213.2 Low 07:53:48 - 08:15:30 6784
Pasco 08:04:34 -21.2 Dark Down 21.4 214.4 Low 07:53:43 - 08:15:25 6783
PNWRO 08:04:32 -21.4 Dark Down 21.5 214.7 Low 07:53:41 - 08:15:23 6773
George/Umatilla 08:04:34 -21.5 Dark Down 21.7 214.3 Low 07:53:43 - 08:15:25 6767
Goldendale 08:04:39 -21.7 Dark Down 22.4 212.9 Low 07:53:48 - 08:15:30 6757
The Dalles 08:04:39 -21.9 Dark Down 22.7 212.6 Low 07:53:48 - 08:15:30 6745
Maupin 08:04:37 -22.3 Dark Down 23.0 212.8 Low 07:53:46 - 08:15:28 6726
Madras/Culver 08:04:36 -22.8 Dark Down 23.5 212.9 Low 07:53:45 - 08:15:27 6700
Redmond 08:04:35 -23.2 Dark Down 23.8 212.9 Low 07:53:44 - 08:15:26 6683
Sisters 08:04:36 -23.2 Dark Down 24.0 212.5 Low 07:53:45 - 08:15:27 6682
Bend 08:04:35 -23.4 Dark Down 24.1 212.8 Low 07:53:44 - 08:15:26 6672
Oregon Observatory 08:04:35 -23.6 Dark Down 24.3 212.7 Low 07:53:44 - 08:15:26 6663
La Pine/Gilchrist 08:04:35 -23.8 Dark Down 24.4 212.7 Low 07:53:44 - 08:15:26 6652
North Lake 08:04:32 -24.2 Dark Down 24.6 213.4 Low 07:53:41 - 08:15:23 6634
Paisley 08:04:29 -24.8 Dark Down 24.9 213.9 Low 07:53:38 - 08:15:20 6607
Chiloquin 08:04:35 -24.9 Dark Down 25.5 212.7 Low 07:53:44 - 08:15:26 6595
Lakeview 08:04:28 -25.3 Dark Down 25.2 214.2 Low 07:53:37 - 08:15:19 6582
Klamath Falls 08:04:32 -25.3 Dark Down 25.8 212.8 Low 07:53:41 - 08:15:23 6577
Tulelake 08:04:30 -25.5 Dark Down 25.9 213.2 Low 07:53:39 - 08:15:21 6565
Cedarville 08:04:25 -25.9 Dark Down 25.7 214.5 Low 07:53:34 - 08:15:16 6548
Fall River/Burney 08:04:30 -26.4 Dark Down 26.6 213.5 Low 07:53:39 - 08:15:21 6517
Susanville 08:04:24 -27.1 Dark Down 26.8 214.4 Low 07:53:33 - 08:15:15 6486
Niwot 08:03:36 -25.6 Dark Down 19.4 228.1 Really Low 07:52:45 - 08:14:27 6483
SwRI 08:03:35 -25.7 Dark Down 19.5 228.1 Really Low 07:52:44 - 08:14:26 6477
Gimple 08:04:24 -27.3 Dark Down 27.2 214.3 Low 07:53:33 - 08:15:15 6470
Greenville 08:04:24 -27.3 Dark Down 27.2 214.2 Low 07:53:33 - 08:15:15 6470
Quincy 08:04:24 -27.5 Dark Down 27.4 214.2 Low 07:53:33 - 08:15:15 6459
Portola 08:04:23 -27.7 Dark Down 27.3 214.7 Low 07:53:32 - 08:15:14 6454
Reno 08:04:19 -27.9 Dark Down 27.2 215.4 Low 07:53:28 - 08:15:10 6442
Carson City 08:04:18 -28.3 Dark Down 27.5 215.5 Low 07:53:27 - 08:15:09 6422
Yerington 08:04:16 -28.4 Dark Down 27.4 216.2 Low 07:53:25 - 08:15:07 6413
Gardnerville 08:04:18 -28.5 Dark Down 27.7 215.7 Low 07:53:27 - 08:15:09 6408
Hawthorne 08:04:14 -28.9 Dark Down 27.5 216.8 Low 07:53:23 - 08:15:05 6389
Tonopah 08:04:07 -29.3 Dark Down 27.2 218.3 Low 07:53:16 - 08:14:58 6366
Lee Vining 08:04:14 -29.5 Dark Down 28.2 216.6 Low 07:53:23 - 08:15:05 6354
Bishop 08:04:11 -30.0 Dark Down 28.3 217.4 Low 07:53:20 - 08:15:02 6321
Beatty 08:04:03 -30.4 Dark Down 27.9 219.1 Low 07:53:12 - 08:14:54 6299
Indian Springs 08:03:58 -30.7 Dark Down 27.6 220.2 Low 07:53:07 - 08:14:49 6282
Lone Pine 08:04:07 -30.8 Dark Down 28.7 218.0 Low 07:53:16 - 08:14:58 6276
Henderson 08:03:55 -31.1 Dark Down 27.6 221.0 Low 07:53:04 - 08:14:46 6251
Searchlight/Boulder City 08:03:53 -31.7 Dark Down 28.0 221.2 Low 07:53:02 - 08:14:44 6215
Patrick 08:03:49 -31.6 Dark Down 27.5 222.2 Low 07:52:58 - 08:14:40 6213
Kingman/Dolan Springs 08:03:49 -31.9 Dark Down 27.8 222.1 Low 07:52:58 - 08:14:40 6199
Laughlin/Bullhead City 08:03:51 -32.0 Dark Down 28.1 221.6 Low 07:53:00 - 08:14:42 6197
DCO 08:03:46 -31.8 Dark Down 27.4 222.9 Low 07:52:55 - 08:14:37 6195
CPSLO 08:04:13 -32.2 Dark Down 31.0 216.0 Up 07:53:22 - 08:15:04 6185
Mohave Valley 08:03:50 -32.2 Dark Down 28.3 221.7 Low 07:52:59 - 08:14:41 6180
Lake Havasu City 08:03:49 -32.6 Dark Down 28.4 222.1 Low 07:52:58 - 08:14:40 6155
Parker 08:03:47 -32.9 Dark Down 28.7 222.2 Low 07:52:56 - 08:14:38 6132
Wildwood 08:04:02 -33.3 Dark Down 31.0 218.3 Up 07:53:11 - 08:14:53 6116
Idyllwild 08:03:55 -33.6 Dark Down 30.3 220.2 Up 07:53:04 - 08:14:46 6100
Blythe 08:03:48 -33.5 Dark Down 29.2 222.2 Low 07:52:57 - 08:14:39 6097
Calipatria 08:03:49 -34.1 Dark Down 30.1 221.5 Up 07:52:58 - 08:14:40 6063
Yuma 08:03:45 -34.4 Dark Down 30.0 222.5 Low 07:52:54 - 08:14:36 6036

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 12HL85, (2019/06/05 08:05UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 20.96 105
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.11 130
8Alp1Lib       14:50:41.1 -15:59:51  5.1  0.54 126
PPM 229351     14:50:06.4 -15:31:34  7.2  0.15 126
12HL85         14:49:30.4 -15:32:35 16.1       125
Positions are for J2000

Event circumstances last updated at 2019/02/12 08:22:56 UT

Marc W. Buie, Southwest Research Institute

RECON