RECON: TNO occultation with 07LJ38

Event between 07LJ38 and star GA0860:09226780 with event index number of 2029142

Geocentric closest approach at 2027/06/07 07:03:24 UTC

J2000 position of star is 18:42:34.8 -02:13:27
Equinox of date position of star is 18:43:46.3 -02:12:01
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 156 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 39.2 AU from the Sun and 38.3 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 388 seconds.
The 1-sigma cross-track error in the shadow position is 3466 km.
The sky-plane scale is 27775.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=210.9 km assuming a 5% albedo -- 9.9 sec chord
Diameter=86.1 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 07LJ38, (2027/06/07 07:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.6 -26:29:25  0.9 40.07 139
60Bet Oph      17:44:49.7 +04:33:28  2.8 16.25 141
5 Aql          18:47:53.6 -00:55:49  6.2  1.59 155
PPM 202087     18:45:48.2 -02:27:33  8.2  0.52 156
PPM 202043     18:43:41.0 -02:18:00  9.6  0.13 156
07LJ38         18:44:00.5 -02:11:44 14.0       156
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 2.3 sigma about the mid-time.
The median site spacing is 27.4 km RECON observability=1.0 and success probability=12.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:04:48 -15.2 AT Down 31.8 150.3 Up 06:49:48 - 07:19:48 1789
Kamloops 07:05:30 -15.6 AT Down 27.4 134.7 Low 06:50:30 - 07:20:30 1658
Kelowna 07:05:29 -16.5 AT Down 28.4 135.3 Low 06:50:29 - 07:20:29 1603
Peachland 07:05:30 -16.6 AT Down 28.4 134.9 Low 06:50:30 - 07:20:30 1595
Summerland 07:05:30 -16.7 AT Down 28.5 135.0 Low 06:50:30 - 07:20:30 1585
Penticton 07:05:30 -16.8 AT Down 28.6 135.0 Low 06:50:30 - 07:20:30 1580
Oliver 07:05:31 -17.2 AT Down 28.9 134.9 Low 06:50:31 - 07:20:31 1555
Anarchist Mountain Observatory 07:05:31 -17.4 AT Down 29.1 135.0 Low 06:50:31 - 07:20:31 1544
Victoria 07:05:42 -17.2 AT Down 27.5 130.9 Low 06:50:42 - 07:20:42 1497
Okanogan 07:05:33 -18.0 AT Down 29.4 134.6 Low 06:50:33 - 07:20:33 1497
Brewster 07:05:34 -18.2 Dark Down 29.5 134.3 Low 06:50:34 - 07:20:34 1476
Manson/Chelan 07:05:36 -18.3 Dark Down 29.5 133.8 Low 06:50:36 - 07:20:36 1460
Wenatchee 07:05:37 -18.8 Dark Down 29.7 133.5 Low 06:50:37 - 07:20:37 1425
Ellensburg 07:05:39 -19.2 Dark Down 29.9 133.1 Low 06:50:39 - 07:20:39 1394
Yakima 07:05:40 -19.5 Dark Down 30.2 132.9 Up 06:50:40 - 07:20:40 1363
Toppenish/White Swan 07:05:40 -19.8 Dark Down 30.4 133.0 Up 06:50:40 - 07:20:40 1347
PNWRO 07:05:37 -20.4 Dark Down 31.4 134.3 Up 06:50:37 - 07:20:37 1324
The Dalles 07:05:44 -20.4 Dark Down 30.6 131.8 Up 06:50:44 - 07:20:44 1286
Maupin 07:05:45 -20.8 Dark Down 30.9 131.8 Up 06:50:45 - 07:20:45 1255
Sisters 07:05:48 -21.6 Dark Down 31.2 130.9 Up 06:50:48 - 07:20:48 1185
Bend 07:05:48 -21.9 Dark Down 31.5 131.0 Up 06:50:48 - 07:20:48 1167
Oregon Observatory 07:05:49 -22.0 Dark Down 31.6 130.8 Up 06:50:49 - 07:20:49 1154
Chiloquin 07:05:53 -23.2 Dark Down 32.2 129.8 Up 06:50:53 - 07:20:53 1047
Klamath Falls 07:05:53 -23.6 Dark Down 32.5 129.7 Up 06:50:53 - 07:20:53 1020
Cedarville 07:05:50 -24.5 Dark Down 33.8 131.0 Up 06:50:50 - 07:20:50 969
Fall River/Burney 07:05:55 -24.8 Dark Down 33.4 129.5 Up 06:50:55 - 07:20:55 925
Dunrhomin 07:05:03 -27.0 Dark Down 42.2 146.6 Up 06:50:03 - 07:20:03 909
CU-SBO 07:05:03 -27.2 Dark Down 42.3 146.4 Up 06:50:03 - 07:20:03 888
Gimple 07:05:55 -25.8 Dark Down 34.3 129.6 Up 06:50:55 - 07:20:55 851
Greenville 07:05:55 -25.7 Dark Down 34.3 129.5 Up 06:50:55 - 07:20:55 851
Quincy 07:05:56 -25.9 Dark Down 34.4 129.4 Up 06:50:56 - 07:20:56 834
Portola 07:05:54 -26.2 Dark Down 34.8 129.8 Up 06:50:54 - 07:20:54 825
Reno 07:05:53 -26.5 Dark Down 35.3 130.3 Up 06:50:53 - 07:20:53 805
Carson City 07:05:54 -26.9 Dark Down 35.6 130.1 Up 06:50:54 - 07:20:54 775
Yerington 07:05:52 -27.2 Dark Down 36.1 130.6 Up 06:50:52 - 07:20:52 760
Gardnerville 07:05:54 -27.1 Dark Down 35.7 130.0 Up 06:50:54 - 07:20:54 754
Hawthorne 07:05:51 -27.7 Dark Down 36.7 130.9 Up 06:50:51 - 07:20:51 723
Lee Vining 07:05:54 -28.2 Dark Down 36.8 130.1 Up 06:50:54 - 07:20:54 673
Bishop 07:05:53 -28.9 Dark Down 37.6 130.5 Up 06:50:53 - 07:20:53 623
Beatty 07:05:48 -29.6 Dark Down 38.9 131.8 Up 06:50:48 - 07:20:48 588
Patrick 07:05:41 -31.5 Dark Down 41.6 133.9 Up 06:50:41 - 07:20:41 466
Laughlin/Bullhead City 07:05:43 -31.6 Dark Down 41.3 133.0 Up 06:50:43 - 07:20:43 442
Lake Havasu City 07:05:44 -32.3 Dark Down 41.9 132.9 Up 06:50:44 - 07:20:44 382
Wildwood 07:05:59 -32.1 Dark Down 39.5 128.3 Up 06:50:59 - 07:20:59 332
George/Scottsdale 07:05:36 -33.3 Dark Down 43.9 135.0 Up 06:50:36 - 07:20:36 320
Idyllwild 07:05:53 -32.7 Dark Down 41.0 129.9 Up 06:50:53 - 07:20:53 306
Calipatria 07:05:50 -33.5 Dark Down 42.1 130.7 Up 06:50:50 - 07:20:50 254
Yuma 07:05:47 -34.1 Dark Down 43.0 131.3 Up 06:50:47 - 07:20:47 217

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, (2027/06/07 07:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 40.07 139
60Bet Oph      17:43:28.3 +04:34:06  2.8 16.25 141
5 Aql          18:46:28.6 -00:57:42  6.2  1.59 155
PPM 202087     18:44:22.3 -02:29:21  8.2  0.52 156
PPM 202043     18:42:15.2 -02:19:42  9.6  0.13 156
07LJ38         18:42:34.8 -02:13:27 14.0       155
Positions are for J2000

Event circumstances last updated at 2022/11/21 02:41:00 UT

Marc W. Buie, Southwest Research Institute

RECON