RECON: TNO occultation with 523696

Event between (523696) 14GW53 and star GA0720:05460497 with event index number of 2334754

Geocentric closest approach at 2027/05/09 09:28:23 UTC

J2000 position of star is 15:17:13.6 -16:40:04
Equinox of date position of star is 15:18:35.7 -16:45:20
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 143 degrees from the moon. Moon is 11% illuminated.
Apparent brightness V=21.5

[RECON map]
Object is 39.5 AU from the Sun and 38.5 AU from the Earth.
Apparent velocity is 25.0 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 73 seconds.
The 1-sigma cross-track error in the shadow position is 1699 km.
The sky-plane scale is 27921.1 km/arcsec.

The object has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 18.6 sec chord
Diameter=188.3 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523696, (2027/05/09 09:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.4 -26:29:25  0.9 19.38 162
27Bet Lib      15:18:29.0 -09:28:55  2.6  7.28 140
28 Lib         15:22:27.0 -18:15:21  6.4  1.73 144
PPM 229896     15:13:53.1 -16:30:45  7.8  1.20 142
PPM 230025     15:19:02.8 -16:57:35  9.9  0.20 143
523696         15:18:46.0 -16:46:00 15.2       143
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 16.7 km RECON observability=1.0 and success probability=14.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:27:42 -13.5 AT Down 15.3 213.4 Really Low 09:21:05 - 09:34:19 -949
Kamloops 09:28:15 -19.1 Dark Down 20.5 199.8 Low 09:21:38 - 09:34:52 -1045
Kelowna 09:28:12 -19.7 Dark Down 21.1 200.8 Low 09:21:35 - 09:34:49 -1071
Peachland 09:28:13 -19.8 Dark Down 21.3 200.5 Low 09:21:36 - 09:34:50 -1077
Summerland 09:28:12 -20.0 Dark Down 21.4 200.7 Low 09:21:35 - 09:34:49 -1082
Penticton 09:28:12 -20.0 Dark Down 21.4 200.8 Low 09:21:35 - 09:34:49 -1084
Oliver 09:28:11 -20.3 Dark Down 21.8 200.8 Low 09:21:34 - 09:34:48 -1099
Anarchist Mountain Observatory 09:28:10 -20.4 Dark Down 21.9 201.0 Low 09:21:33 - 09:34:47 -1104
Okanogan 09:28:10 -21.1 Dark Down 22.5 200.9 Low 09:21:33 - 09:34:47 -1133
Brewster 09:28:10 -21.4 Dark Down 22.8 200.7 Low 09:21:33 - 09:34:47 -1145
Victoria 09:28:21 -21.9 Dark Down 23.2 197.0 Low 09:21:44 - 09:34:58 -1152
Manson/Chelan 09:28:11 -21.7 Dark Down 23.1 200.4 Low 09:21:34 - 09:34:48 -1156
Wenatchee 09:28:11 -22.1 Dark Down 23.6 200.3 Low 09:21:34 - 09:34:48 -1178
Ellensburg 09:28:11 -22.6 Dark Down 24.0 200.1 Low 09:21:34 - 09:34:48 -1198
Yakima 09:28:10 -23.0 Dark Down 24.4 200.2 Low 09:21:33 - 09:34:47 -1216
Toppenish/White Swan 09:28:09 -23.1 Dark Down 24.6 200.4 Low 09:21:32 - 09:34:46 -1225
PNWRO 09:28:05 -23.0 Dark Down 24.6 202.0 Low 09:21:28 - 09:34:42 -1232
The Dalles 09:28:10 -24.0 Dark Down 25.5 199.7 Low 09:21:33 - 09:34:47 -1267
Maupin 09:28:10 -24.4 Dark Down 25.9 199.9 Low 09:21:33 - 09:34:47 -1286
Sisters 09:28:10 -25.3 Dark Down 26.8 199.5 Low 09:21:33 - 09:34:47 -1331
Bend 09:28:09 -25.5 Dark Down 27.0 199.8 Low 09:21:32 - 09:34:46 -1341
Oregon Observatory 09:28:09 -25.7 Dark Down 27.2 199.7 Low 09:21:32 - 09:34:46 -1351
Chiloquin 09:28:09 -27.0 Dark Down 28.5 199.5 Low 09:21:32 - 09:34:46 -1421
Klamath Falls 09:28:08 -27.3 Dark Down 28.8 199.7 Low 09:21:31 - 09:34:45 -1439
Cedarville 09:28:02 -27.5 Dark Down 29.1 201.5 Low 09:21:25 - 09:34:39 -1464
Dunrhomin 09:27:24 -22.6 Dark Down 24.7 216.5 Low 09:20:47 - 09:34:01 -1499
Fall River/Burney 09:28:05 -28.3 Dark Down 29.8 200.3 Low 09:21:28 - 09:34:42 -1500
Nikitin 09:27:24 -22.8 Dark Down 24.9 216.6 Low 09:20:47 - 09:34:01 -1510
CU-SBO 09:27:24 -22.9 Dark Down 25.0 216.5 Low 09:20:47 - 09:34:01 -1513
Gimple 09:28:02 -29.0 Dark Down 30.6 201.0 Up 09:21:25 - 09:34:39 -1546
Greenville 09:28:03 -29.0 Dark Down 30.6 200.9 Up 09:21:26 - 09:34:40 -1546
Quincy 09:28:02 -29.2 Dark Down 30.8 201.0 Up 09:21:25 - 09:34:39 -1558
Portola 09:28:01 -29.1 Dark Down 30.8 201.5 Up 09:21:24 - 09:34:38 -1561
Reno 09:27:58 -29.2 Dark Down 30.8 202.2 Up 09:21:21 - 09:34:35 -1572
Carson City 09:27:58 -29.5 Dark Down 31.1 202.3 Up 09:21:21 - 09:34:35 -1592
Yerington 09:27:55 -29.5 Dark Down 31.1 203.1 Up 09:21:18 - 09:34:32 -1599
Gardnerville 09:27:57 -29.7 Dark Down 31.4 202.5 Up 09:21:20 - 09:34:34 -1606
Hawthorne 09:27:53 -29.7 Dark Down 31.4 203.7 Up 09:21:16 - 09:34:30 -1623
Lee Vining 09:27:54 -30.4 Dark Down 32.1 203.3 Up 09:21:17 - 09:34:31 -1659
Bishop 09:27:50 -30.6 Dark Down 32.4 204.3 Up 09:21:13 - 09:34:27 -1691
Beatty 09:27:45 -30.4 Dark Down 32.3 206.1 Up 09:21:08 - 09:34:22 -1709
Patrick 09:27:33 -30.5 Dark Down 32.5 209.5 Up 09:20:56 - 09:34:10 -1786
Laughlin/Bullhead City 09:27:35 -31.1 Dark Down 33.0 208.9 Up 09:20:58 - 09:34:12 -1806
Lake Havasu City 09:27:33 -31.5 Dark Down 33.5 209.3 Up 09:20:56 - 09:34:10 -1848
George/Scottsdale 09:27:24 -31.1 Dark Down 33.1 212.1 Up 09:20:47 - 09:34:01 -1888
Wildwood 09:27:47 -33.6 Dark Down 35.4 204.9 Up 09:21:10 - 09:34:24 -1899
Idyllwild 09:27:40 -33.2 Dark Down 35.1 207.1 Up 09:21:03 - 09:34:17 -1910
Calipatria 09:27:35 -33.2 Dark Down 35.2 208.5 Up 09:20:58 - 09:34:12 -1945
Yuma 09:27:31 -33.2 Dark Down 35.2 209.6 Up 09:20:54 - 09:34:08 -1969

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 523696, (2027/05/09 09:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.38 162
27Bet Lib      15:17:00.3 -09:22:59  2.6  7.28 140
28 Lib         15:20:53.7 -18:09:32  6.4  1.73 144
PPM 229896     15:12:20.9 -16:24:40  7.8  1.20 142
PPM 230025     15:17:30.3 -16:51:40  9.9  0.20 143
523696         15:17:13.6 -16:40:04 15.2       143
Positions are for J2000

Event circumstances last updated at 2024/04/18 03:47:51 UT

Marc W. Buie, Southwest Research Institute

RECON