RECON: TNO occultation with 07LJ38

Event between 07LJ38 and star GA0900:06551591 with event index number of 1123181

Geocentric closest approach at 2021/04/19 09:17:31 UTC

J2000 position of star is 18:04:13.4 +01:25:03
Equinox of date position of star is 18:05:17.4 +01:25:12
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 147 degrees from the moon. Moon is 41% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 38.5 AU from the Sun and 38.1 AU from the Earth.
The TNO is moving 12.1 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 381 seconds.
The 1-sigma cross-track error in the shadow position is 3608 km.
The sky-plane scale is 27636.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=206.1 km assuming a 5% albedo -- 17.0 sec chord
Diameter=84.1 km assuming a 30% albedo -- 6.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 07LJ38, (2021/04/19 09:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.0 -26:28:39  0.9 36.04 141
60Bet Oph      17:44:31.5 +04:33:36  2.8  6.06 141
70 Oph         18:06:32.0 +02:29:47  4.9  1.12 146
PPM 165113     18:05:37.2 +01:14:25  7.8  0.20 147
07LJ38         18:05:18.2 +01:25:12 16.7       147
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 2.4 sigma about the mid-time.
The median site spacing is 14.5 km RECON observability=1.0 and success probability=6.4%
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 09:24:51 -25.5 Dark Up 29.9 130.3 Low 09:09:51 - 09:39:51 6310
Kelowna 09:24:48 -25.9 Dark Up 30.0 129.9 Up 09:09:48 - 09:39:48 6268
Peachland 09:24:49 -26.0 Dark Up 30.0 129.6 Low 09:09:49 - 09:39:49 6246
Summerland 09:24:48 -26.2 Dark Up 30.1 129.6 Up 09:09:48 - 09:39:48 6236
Penticton 09:24:48 -26.2 Dark Up 30.2 129.7 Up 09:09:48 - 09:39:48 6234
Oliver 09:24:51 -26.5 Dark Up 30.4 129.5 Up 09:09:51 - 09:39:51 6202
Anarchist Mountain Observatory 09:24:46 -26.6 Dark Up 30.6 129.6 Up 09:09:46 - 09:39:46 6194
Tonasket 09:24:46 -26.9 Dark Up 30.8 129.4 Up 09:09:46 - 09:39:46 6163
Okanogan 09:24:46 -27.3 Dark Up 30.9 129.1 Up 09:09:46 - 09:39:46 6126
Brewster 09:24:46 -27.6 Dark Up 31.0 128.8 Up 09:09:46 - 09:39:46 6093
Dunrhomin 09:23:32 -28.6 Dark Down 43.8 140.0 Up 09:08:32 - 09:38:32 6083
Manson/Chelan 09:24:47 -27.9 Dark Up 30.9 128.3 Up 09:09:47 - 09:39:47 6059
Wenatchee 09:24:47 -28.3 Dark Up 31.1 127.9 Up 09:09:47 - 09:39:47 6008
Victoria 09:24:58 -28.1 Dark Up 28.8 125.5 Low 09:09:58 - 09:39:58 5996
Ellensburg 09:24:47 -28.8 Dark Up 31.3 127.5 Up 09:09:47 - 09:39:47 5961
Pasco 09:24:41 -29.1 Dark Up 32.5 128.5 Up 09:09:41 - 09:39:41 5949
PNWRO 09:24:41 -29.2 Dark Up 32.8 128.6 Up 09:09:41 - 09:39:41 5936
Yakima 09:24:47 -29.2 Dark Up 31.5 127.3 Up 09:09:47 - 09:39:47 5922
Toppenish/White Swan 09:24:46 -29.3 Dark Up 31.7 127.4 Up 09:09:46 - 09:39:46 5909
Goldendale 09:24:46 -29.9 Dark Up 31.8 126.7 Up 09:09:46 - 09:39:46 5840
The Dalles 09:24:47 -30.2 Dark Up 31.8 126.2 Up 09:09:47 - 09:39:47 5804
Maupin 09:24:46 -30.6 Dark Up 32.1 126.1 Up 09:09:46 - 09:39:46 5769
Redmond 09:24:45 -31.5 Dark Up 32.5 125.5 Up 09:09:45 - 09:39:45 5680
Sisters 09:24:46 -31.5 Dark Up 32.3 125.2 Up 09:09:46 - 09:39:46 5666
Bend 09:24:45 -31.7 Dark Up 32.6 125.3 Up 09:09:45 - 09:39:45 5654
Oregon Observatory 09:24:45 -31.9 Dark Up 32.6 125.1 Up 09:09:45 - 09:39:45 5632
La Pine/Gilchrist 09:24:45 -32.1 Dark Up 32.7 124.9 Up 09:09:45 - 09:39:45 5610
North Lake 09:24:42 -32.3 Dark Down 33.3 125.2 Up 09:09:42 - 09:39:42 5594
Paisley 09:24:40 -32.7 Dark Down 33.8 125.3 Up 09:09:40 - 09:39:40 5557
Lakeview 09:24:38 -33.1 Dark Down 34.2 125.2 Up 09:09:38 - 09:39:38 5517
Cedarville 09:24:35 -33.7 Dark Down 34.7 125.0 Up 09:09:35 - 09:39:35 5463
Klamath Falls 09:24:43 -33.5 Dark Down 33.3 123.8 Up 09:09:43 - 09:39:43 5460
Fall River/Burney 09:24:39 -34.5 Dark Down 34.2 123.5 Up 09:09:39 - 09:39:39 5364
Susanville 09:24:35 -34.8 Dark Down 35.0 123.9 Up 09:09:35 - 09:39:35 5337
Gimple 09:24:35 -35.1 Dark Down 35.0 123.5 Up 09:09:35 - 09:39:35 5301
Greenville 09:24:36 -35.2 Dark Down 35.0 123.4 Up 09:09:36 - 09:39:36 5298
Reno 09:24:30 -35.3 Dark Down 36.0 124.1 Up 09:09:30 - 09:39:30 5291
Portola 09:24:33 -35.3 Dark Down 35.5 123.7 Up 09:09:33 - 09:39:33 5287
Quincy 09:24:35 -35.4 Dark Down 35.1 123.3 Up 09:09:35 - 09:39:35 5278
Tonopah 09:24:17 -35.7 Dark Down 38.5 125.7 Up 09:09:17 - 09:39:17 5273
Yerington 09:24:24 -35.6 Dark Down 36.7 124.4 Up 09:09:24 - 09:39:24 5270
Carson City 09:24:29 -35.7 Dark Down 36.2 123.9 Up 09:09:29 - 09:39:29 5259
Hawthorne 09:24:23 -35.8 Dark Down 37.3 124.6 Up 09:09:23 - 09:39:23 5250
Gardnerville 09:24:28 -35.9 Dark Down 36.4 123.8 Up 09:09:28 - 09:39:28 5238
Indian Springs 09:24:05 -36.4 Dark Down 40.3 126.1 Up 09:09:05 - 09:39:05 5211
Henderson 09:23:58 -36.6 Dark Down 41.1 126.4 Up 09:08:58 - 09:38:58 5197
Patrick 09:23:55 -36.6 Dark Down 42.2 127.1 Up 09:08:55 - 09:38:55 5197
Beatty 09:24:10 -36.6 Dark Down 39.5 125.3 Up 09:09:10 - 09:39:10 5188
Lee Vining 09:24:24 -36.5 Dark Down 37.4 123.8 Up 09:09:24 - 09:39:24 5174
Kingman/Dolan Springs 09:23:53 -36.9 Dark Down 42.2 126.7 Up 09:08:53 - 09:38:53 5167
Bishop 09:24:17 -36.8 Dark Down 38.1 124.1 Up 09:09:17 - 09:39:17 5153
George/Scottsdale 09:23:40 -37.0 Dark Down 44.5 127.9 Up 09:08:40 - 09:38:40 5151
Laughlin/Bullhead City 09:23:54 -37.1 Dark Down 41.9 126.2 Up 09:08:54 - 09:38:54 5138
Mohave Valley 09:23:56 -37.3 Dark Down 42.0 126.0 Up 09:08:56 - 09:38:56 5114
Lake Havasu City 09:23:53 -37.6 Dark Down 42.4 126.0 Up 09:08:53 - 09:38:53 5090
Parker 09:23:49 -37.9 Dark Down 42.6 125.7 Up 09:08:49 - 09:38:49 5060
Blythe 09:23:51 -38.4 Dark Down 42.7 125.0 Up 09:08:51 - 09:38:51 4996
Yuma 09:23:49 -39.2 Dark Down 43.2 124.3 Up 09:08:49 - 09:38:49 4909
Calipatria 09:23:53 -39.3 Dark Down 42.4 123.7 Up 09:08:53 - 09:38:53 4901
Idyllwild 09:23:56 -39.3 Dark Down 41.2 123.1 Up 09:08:56 - 09:38:56 4897
CPSLO 09:24:21 -39.5 Dark Down 37.7 120.6 Up 09:09:21 - 09:39:21 4851
Wildwood 09:24:10 -39.7 Dark Down 39.8 121.6 Up 09:09:10 - 09:39:10 4836

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 07LJ38, (2021/04/19 09:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 36.04 141
60Bet Oph      17:43:28.3 +04:34:06  2.8  6.06 141
70 Oph         18:05:27.8 +02:29:35  4.9  1.12 146
PPM 165113     18:04:32.3 +01:14:16  7.8  0.20 147
07LJ38         18:04:13.4 +01:25:03 16.7       147
Positions are for J2000

Event circumstances last updated at 2021/01/20 20:39:37 UT

Marc W. Buie, Southwest Research Institute

RECON