RECON: TNO occultation with 00KL4

Event between 00KL4 and star GA0840:08598612 with event index number of 2581204

Geocentric closest approach at 2023/06/12 05:47:30 UTC

J2000 position of star is 18:25:52.5 -05:50:51
Equinox of date position of star is 18:27:07.3 -05:49:57
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 93 degrees from the moon. Moon is 34% illuminated.
Apparent brightness V=23.4

[RECON map]
Object is 39.0 AU from the Sun and 38.1 AU from the Earth.
Apparent velocity is 23.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 422 seconds.
The 1-sigma cross-track error in the shadow position is 2393 km.
The sky-plane scale is 27601.8 km/arcsec.

The object has an absolute magnitude Hv=7.5
Diameter=187.9 km assuming a 5% albedo -- 8.0 sec chord
Diameter=76.7 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 00KL4, (2023/06/12 05:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.9 -26:28:55  0.9 34.56 119
60Bet Oph      17:44:37.9 +04:33:33  2.8 14.85 103
PPM 201808     18:31:29.5 -05:42:25  6.2  1.09  92
PPM 201758     18:27:52.3 -05:35:11  8.5  0.31  93
PPM 201741     18:26:45.2 -05:37:44  8.7  0.22  93
00KL4          18:27:07.8 -05:49:57 15.2        93
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 2.1 sigma about the mid-time.
The median site spacing is 26.1 km RECON observability=0.7 and success probability=12.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:49:08 -13.0 AT Down 24.9 141.2 Low 05:34:08 - 06:04:08 2714
Kamloops 05:49:43 -10.7 NT Down 19.5 127.1 Really Low 05:34:43 - 06:04:43 2549
Kelowna 05:49:43 -11.7 NT Down 20.5 127.7 Low 05:34:43 - 06:04:43 2500
Peachland 05:49:44 -11.7 NT Down 20.4 127.4 Low 05:34:44 - 06:04:44 2491
Summerland 05:49:45 -11.8 NT Down 20.5 127.4 Low 05:34:45 - 06:04:45 2482
Penticton 05:49:44 -11.9 NT Down 20.6 127.5 Low 05:34:44 - 06:04:44 2478
Oliver 05:49:46 -12.2 AT Down 20.8 127.4 Low 05:34:46 - 06:04:46 2455
Anarchist Mountain Observatory 05:49:45 -12.5 AT Down 21.0 127.5 Low 05:34:45 - 06:04:45 2445
Okanogan 05:49:48 -12.9 AT Down 21.3 127.1 Low 05:34:48 - 06:04:48 2399
Victoria 05:49:54 -11.5 NT Down 19.2 123.8 Really Low 05:34:54 - 06:04:54 2386
Brewster 05:49:48 -13.1 AT Down 21.4 126.9 Low 05:34:48 - 06:04:48 2379
Manson/Chelan 05:49:50 -13.2 AT Down 21.3 126.5 Low 05:34:50 - 06:04:50 2362
Wenatchee 05:49:51 -13.5 AT Down 21.5 126.2 Low 05:34:51 - 06:04:51 2328
Ellensburg 05:49:53 -13.8 AT Down 21.6 125.9 Low 05:34:53 - 06:04:53 2298
Yakima 05:49:54 -14.1 AT Down 21.9 125.7 Low 05:34:54 - 06:04:54 2269
Toppenish/White Swan 05:49:54 -14.4 AT Down 22.1 125.8 Low 05:34:54 - 06:04:54 2254
PNWRO 05:49:52 -15.2 AT Down 23.1 127.0 Low 05:34:52 - 06:04:52 2238
The Dalles 05:49:58 -14.8 AT Down 22.1 124.8 Low 05:34:58 - 06:04:58 2193
Maupin 05:49:59 -15.2 AT Down 22.4 124.8 Low 05:34:59 - 06:04:59 2163
Sisters 05:50:02 -15.7 AT Down 22.6 124.1 Low 05:35:02 - 06:05:02 2095
Bend 05:50:02 -16.0 AT Down 22.9 124.2 Low 05:35:02 - 06:05:02 2079
Oregon Observatory 05:50:03 -16.1 AT Down 22.9 124.1 Low 05:35:03 - 06:05:03 2065
Chiloquin 05:50:07 -17.1 AT Down 23.4 123.2 Low 05:35:07 - 06:05:07 1962
Klamath Falls 05:50:08 -17.4 AT Down 23.6 123.2 Low 05:35:08 - 06:05:08 1936
Cedarville 05:50:05 -18.6 Dark Down 25.0 124.3 Low 05:35:05 - 06:05:05 1893
Dunrhomin 05:49:28 -24.5 Dark Down 34.3 137.7 Up 05:34:28 - 06:04:28 1888
Nikitin 05:49:29 -24.7 Dark Down 34.5 137.6 Up 05:34:29 - 06:04:29 1873
CU-SBO 05:49:29 -24.7 Dark Down 34.5 137.5 Up 05:34:29 - 06:04:29 1868
Fall River/Burney 05:50:09 -18.6 Dark Down 24.5 123.1 Low 05:35:09 - 06:05:09 1846
Gimple 05:50:10 -19.5 Dark Down 25.4 123.2 Low 05:35:10 - 06:05:10 1778
Greenville 05:50:10 -19.5 Dark Down 25.3 123.1 Low 05:35:10 - 06:05:10 1777
Quincy 05:50:11 -19.7 Dark Down 25.4 123.0 Low 05:35:11 - 06:05:11 1761
Portola 05:50:10 -20.0 Dark Down 25.8 123.4 Low 05:35:10 - 06:05:10 1755
Reno 05:50:09 -20.5 Dark Down 26.4 123.8 Low 05:35:09 - 06:05:09 1738
Carson City 05:50:10 -20.8 Dark Down 26.6 123.7 Low 05:35:10 - 06:05:10 1709
Yerington 05:50:09 -21.2 Dark Down 27.1 124.1 Low 05:35:09 - 06:05:09 1697
Gardnerville 05:50:10 -21.0 Dark Down 26.7 123.6 Low 05:35:10 - 06:05:10 1689
Hawthorne 05:50:08 -21.8 Dark Down 27.7 124.4 Low 05:35:08 - 06:05:08 1663
Lee Vining 05:50:11 -22.1 Dark Down 27.7 123.7 Low 05:35:11 - 06:05:11 1613
Bishop 05:50:10 -22.9 Dark Down 28.5 124.1 Low 05:35:10 - 06:05:10 1568
Beatty 05:50:07 -24.0 Dark Down 29.8 125.3 Low 05:35:07 - 06:05:07 1541
Patrick 05:50:02 -26.4 Dark Down 32.6 127.1 Up 05:35:02 - 06:05:02 1435
Laughlin/Bullhead City 05:50:04 -26.3 Dark Down 32.3 126.3 Up 05:35:04 - 06:05:04 1409
Lake Havasu City 05:50:05 -27.0 Dark Down 32.8 126.2 Up 05:35:05 - 06:05:05 1352
George/Scottsdale 05:49:59 -28.6 Dark Down 34.9 128.0 Up 05:34:59 - 06:04:59 1302
Wildwood 05:50:17 -25.6 Dark Down 30.2 122.4 Up 05:35:17 - 06:05:17 1287
Idyllwild 05:50:13 -26.7 Dark Down 31.7 123.8 Up 05:35:13 - 06:05:13 1270
Calipatria 05:50:11 -27.8 Dark Down 32.8 124.5 Up 05:35:11 - 06:05:11 1224
Yuma 05:50:09 -28.5 Dark Down 33.7 125.0 Up 05:35:09 - 06:05:09 1192

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 00KL4, (2023/06/12 05:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.56 119
60Bet Oph      17:43:28.3 +04:34:06  2.8 14.85 103
PPM 201808     18:30:14.3 -05:43:28  6.2  1.09  92
PPM 201758     18:26:37.2 -05:36:07  8.5  0.31  93
PPM 201741     18:25:30.0 -05:38:37  8.7  0.22  93
00KL4          18:25:52.5 -05:50:51 15.2        93
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:27:14 UT

Marc W. Buie, Southwest Research Institute

RECON