RECON: TNO occultation with 05LB54

Event between 05LB54 and star GA0660:20974412 with event index number of 1942407

Geocentric closest approach at 2023/05/27 08:29:32 UTC

J2000 position of star is 17:51:53.2 -22:58:21
Equinox of date position of star is 17:53:18.0 -22:58:36
Stellar brightness G=12.5, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 47% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 41.6 AU from the Sun and 40.7 AU from the Earth.
Apparent velocity is 22.3 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 745 seconds.
The 1-sigma cross-track error in the shadow position is 2570 km.
The sky-plane scale is 29518.9 km/arcsec.

The object has an absolute magnitude Hv=5.7
Diameter=440.6 km assuming a 5% albedo -- 19.8 sec chord
Diameter=179.9 km assuming a 30% albedo -- 8.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 05LB54, (2023/05/27 08:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.8 -26:28:55  0.9 19.03  97
35Eta Oph      17:11:43.3 -15:45:08  2.6 12.17 105
PPM 267309     17:49:10.5 -22:29:04  6.1  1.07 114
PPM 267401     17:52:33.0 -22:55:34  7.5  0.18 115
05LB54         17:53:18.4 -22:58:36 12.5       116
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 1.2 sigma about the mid-time.
The median site spacing is 15.6 km RECON observability=0.6 and success probability=7.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:29:40 -14.1 AT Down 14.9 178.3 Really Low 08:14:40 - 08:44:40 2182
Kamloops 08:30:24 -17.7 AT Up 15.0 164.7 Really Low 08:15:24 - 08:45:24 2072
Kelowna 08:30:22 -18.4 Dark Up 15.9 165.5 Really Low 08:15:22 - 08:45:22 2052
Peachland 08:30:23 -18.6 Dark Up 16.0 165.2 Really Low 08:15:23 - 08:45:23 2046
Summerland 08:30:23 -18.7 Dark Up 16.1 165.3 Really Low 08:15:23 - 08:45:23 2041
Penticton 08:30:23 -18.8 Dark Up 16.2 165.4 Really Low 08:15:23 - 08:45:23 2040
Oliver 08:30:23 -19.1 Dark Up 16.6 165.3 Really Low 08:15:23 - 08:45:23 2027
Anarchist Mountain Observatory 08:30:23 -19.3 Dark Up 16.8 165.5 Really Low 08:15:23 - 08:45:23 2023
Okanogan 08:30:24 -19.9 Dark Up 17.4 165.2 Really Low 08:15:24 - 08:45:24 1997
Brewster 08:30:25 -20.2 Dark Up 17.6 165.0 Really Low 08:15:25 - 08:45:25 1986
Manson/Chelan 08:30:27 -20.5 Dark Up 17.7 164.7 Really Low 08:15:27 - 08:45:27 1975
Victoria 08:30:36 -20.1 Dark Up 16.5 161.7 Really Low 08:15:36 - 08:45:36 1969
Wenatchee 08:30:28 -20.9 Dark Up 18.1 164.5 Really Low 08:15:28 - 08:45:28 1955
Ellensburg 08:30:29 -21.4 Dark Up 18.5 164.2 Really Low 08:15:29 - 08:45:29 1937
Yakima 08:30:29 -21.8 Dark Up 18.9 164.2 Really Low 08:15:29 - 08:45:29 1921
Toppenish/White Swan 08:30:29 -22.0 Dark Up 19.1 164.3 Really Low 08:15:29 - 08:45:29 1914
PNWRO 08:30:24 -22.2 Dark Up 19.8 165.7 Really Low 08:15:24 - 08:45:24 1911
The Dalles 08:30:32 -22.8 Dark Up 19.7 163.5 Really Low 08:15:32 - 08:45:32 1874
Maupin 08:30:32 -23.2 Dark Up 20.2 163.6 Low 08:15:32 - 08:45:32 1858
Sisters 08:30:35 -24.1 Dark Up 20.9 163.0 Low 08:15:35 - 08:45:35 1815
Bend 08:30:34 -24.3 Dark Up 21.2 163.2 Low 08:15:34 - 08:45:34 1807
Oregon Observatory 08:30:35 -24.5 Dark Up 21.3 163.1 Low 08:15:35 - 08:45:35 1798
Chiloquin 08:30:38 -25.9 Dark Up 22.5 162.5 Low 08:15:38 - 08:45:38 1733
Klamath Falls 08:30:38 -26.2 Dark Up 22.8 162.6 Low 08:15:38 - 08:45:38 1718
Dunrhomin 08:29:38 -24.9 Dark Down 26.8 178.9 Low 08:14:38 - 08:44:38 1717
Nikitin 08:29:38 -25.0 Dark Down 27.0 178.9 Low 08:14:38 - 08:44:38 1707
CU-SBO 08:29:39 -25.1 Dark Down 27.0 178.8 Low 08:14:39 - 08:44:39 1704
Cedarville 08:30:33 -26.7 Dark Up 23.8 164.0 Low 08:15:33 - 08:45:33 1700
Fall River/Burney 08:30:37 -27.3 Dark Up 24.0 162.8 Low 08:15:37 - 08:45:37 1663
Gimple 08:30:37 -28.2 Dark Up 25.0 163.2 Low 08:15:37 - 08:45:37 1623
Greenville 08:30:37 -28.2 Dark Up 25.0 163.1 Low 08:15:37 - 08:45:37 1622
Quincy 08:30:37 -28.4 Dark Up 25.2 163.1 Low 08:15:37 - 08:45:37 1611
Portola 08:30:35 -28.5 Dark Up 25.4 163.5 Low 08:15:35 - 08:45:35 1610
Reno 08:30:33 -28.7 Dark Up 25.8 164.1 Low 08:15:33 - 08:45:33 1602
Carson City 08:30:33 -29.0 Dark Up 26.2 164.1 Low 08:15:33 - 08:45:33 1584
Yerington 08:30:31 -29.1 Dark Up 26.5 164.7 Low 08:15:31 - 08:45:31 1579
Gardnerville 08:30:33 -29.2 Dark Up 26.4 164.1 Low 08:15:33 - 08:45:33 1571
Hawthorne 08:30:29 -29.5 Dark Up 27.0 165.2 Low 08:15:29 - 08:45:29 1559
Lee Vining 08:30:32 -30.1 Dark Up 27.5 164.6 Low 08:15:32 - 08:45:32 1524
Bishop 08:30:30 -30.6 Dark Up 28.2 165.3 Low 08:15:30 - 08:45:30 1497
Beatty 08:30:24 -30.8 Dark Up 29.0 166.8 Low 08:15:24 - 08:45:24 1485
Patrick 08:30:13 -31.7 Dark Down 30.9 169.7 Up 08:15:13 - 08:45:13 1420
Laughlin/Bullhead City 08:30:16 -32.1 Dark Down 31.0 168.9 Up 08:15:16 - 08:45:16 1400
Lake Havasu City 08:30:16 -32.7 Dark Down 31.7 169.1 Up 08:15:16 - 08:45:16 1362
George/Scottsdale 08:30:06 -32.8 Dark Down 32.8 171.6 Up 08:15:06 - 08:45:06 1330
Wildwood 08:30:33 -33.9 Dark Up 31.3 164.6 Up 08:15:33 - 08:45:33 1304
Idyllwild 08:30:25 -33.9 Dark Up 32.1 166.5 Up 08:15:25 - 08:45:25 1299
Calipatria 08:30:21 -34.2 Dark Down 32.9 167.6 Up 08:15:21 - 08:45:21 1269
Yuma 08:30:18 -34.5 Dark Down 33.5 168.5 Up 08:15:18 - 08:45:18 1249

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 05LB54, (2023/05/27 08:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.03  97
35Eta Oph      17:10:22.7 -15:43:29  2.6 12.17 105
PPM 267309     17:47:45.6 -22:28:40  6.1  1.07 114
PPM 267401     17:51:07.8 -22:55:18  7.5  0.18 115
05LB54         17:51:53.2 -22:58:21 12.5       115
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:26:11 UT

Marc W. Buie, Southwest Research Institute

RECON