RECON: TNO occultation with 548141

Event between (548141) 10CD270 and star GA1020:03614465 with event index number of 2399683

Geocentric closest approach at 2024/02/06 12:49:36 UTC

J2000 position of star is 12:57:50.3 +13:18:51
Equinox of date position of star is 12:59:00.4 +13:11:17
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 84 degrees from the moon. Moon is 16% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 25.0 AU from the Sun and 24.4 AU from the Earth.
Apparent velocity is 15.1 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 72 seconds.
The 1-sigma cross-track error in the shadow position is 1481 km.
The sky-plane scale is 17717.9 km/arcsec.

The object has an absolute magnitude Hv=8.1
Diameter=145.2 km assuming a 5% albedo -- 9.8 sec chord
Diameter=59.3 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 548141, (2024/02/06 12:49UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:45.9 +19:03:33  0.0 19.55  72
Vindemiatrix   13:03:22.6 +10:49:48  2.8  2.58  82
41 Vir         12:55:02.3 +12:17:16  6.1  1.33  85
PPM 129441     12:56:25.4 +12:55:50  9.4  0.69  85
PPM 129496     13:01:00.3 +13:18:29 10.7  0.49  84
548141         12:59:02.5 +13:11:03 16.1        84
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 8.2 km RECON observability=0.9 and success probability=25.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:52:16 -16.2 AT Down 44.9 221.5 Up 12:45:47 - 12:58:46 -408
Dunrhomin 12:50:59 -14.5 AT Up 52.8 231.9 Up 12:44:30 - 12:57:29 -589
Nikitin 12:50:58 -14.5 AT Up 52.9 232.1 Up 12:44:29 - 12:57:28 -595
CU-SBO 12:50:58 -14.5 AT Up 53.0 232.1 Up 12:44:28 - 12:57:27 -602
Kelowna 12:52:31 -24.7 Dark Down 51.3 204.4 Up 12:46:02 - 12:59:01 -1232
Penticton 12:52:29 -24.7 Dark Down 51.7 204.4 Up 12:46:00 - 12:58:59 -1248
Summerland 12:52:30 -24.8 Dark Down 51.6 204.2 Up 12:46:01 - 12:59:00 -1252
Anarchist Mountain Observatory 12:52:26 -24.7 Dark Down 52.1 205.0 Up 12:45:57 - 12:58:56 -1253
Peachland 12:52:32 -24.9 Dark Down 51.5 204.0 Up 12:46:02 - 12:59:01 -1253
Oliver 12:52:28 -24.8 Dark Down 52.0 204.6 Up 12:45:58 - 12:58:57 -1259
Kamloops 12:52:37 -25.1 Dark Down 50.8 202.7 Up 12:46:08 - 12:59:07 -1260
George/Scottsdale 12:50:34 -19.0 Dark Up 61.1 230.5 Up 12:44:05 - 12:57:04 -1278
Okanogan 12:52:23 -24.9 Dark Down 52.7 205.0 Up 12:45:53 - 12:58:52 -1288
Brewster 12:52:22 -25.0 Dark Down 53.1 204.8 Up 12:45:52 - 12:58:51 -1309
PNWRO 12:52:08 -24.6 Dark Down 54.7 207.4 Up 12:45:39 - 12:58:38 -1324
Manson/Chelan 12:52:22 -25.3 Dark Down 53.3 204.3 Up 12:45:53 - 12:58:52 -1339
Patrick 12:50:50 -20.8 Dark Up 61.2 225.1 Up 12:44:21 - 12:57:20 -1362
Wenatchee 12:52:19 -25.4 Dark Down 53.8 204.3 Up 12:45:50 - 12:58:49 -1366
Ellensburg 12:52:19 -25.6 Dark Down 54.3 204.2 Up 12:45:49 - 12:58:48 -1395
Toppenish/White Swan 12:52:14 -25.6 Dark Down 54.8 204.8 Up 12:45:44 - 12:58:43 -1407
Yakima 12:52:15 -25.7 Dark Down 54.6 204.4 Up 12:45:46 - 12:58:45 -1410
Laughlin/Bullhead City 12:50:50 -21.4 Dark Up 61.8 224.3 Up 12:44:20 - 12:57:19 -1425
Lake Havasu City 12:50:45 -21.1 Dark Up 62.1 225.5 Up 12:44:15 - 12:57:14 -1433
The Dalles 12:52:11 -26.2 Dark Down 55.7 203.9 Up 12:45:42 - 12:58:41 -1487
Maupin 12:52:10 -26.2 Dark Down 56.1 204.3 Up 12:45:41 - 12:58:40 -1496
Beatty 12:51:07 -23.2 Dark Up 61.6 218.5 Up 12:44:37 - 12:57:36 -1517
Victoria 12:52:33 -27.4 Dark Down 53.5 198.9 Up 12:46:03 - 12:59:02 -1519
Yuma 12:50:35 -21.2 Dark Up 63.5 227.5 Up 12:44:05 - 12:57:04 -1531
Bend 12:52:03 -26.4 Dark Down 57.2 204.6 Up 12:45:34 - 12:58:33 -1554
Sisters 12:52:06 -26.6 Dark Down 57.0 204.0 Up 12:45:36 - 12:58:35 -1562
Oregon Observatory 12:52:02 -26.5 Dark Down 57.4 204.5 Up 12:45:32 - 12:58:31 -1569
Cedarville 12:51:46 -25.7 Dark Up 59.1 208.3 Up 12:45:16 - 12:58:15 -1575
Calipatria 12:50:40 -22.0 Dark Up 63.8 225.4 Up 12:44:11 - 12:57:10 -1582
Hawthorne 12:51:24 -24.6 Dark Up 61.1 213.5 Up 12:44:54 - 12:57:53 -1587
Yerington 12:51:28 -25.0 Dark Up 60.9 212.2 Up 12:44:58 - 12:57:57 -1607
Bishop 12:51:16 -24.5 Dark Up 62.0 215.1 Up 12:44:46 - 12:57:45 -1618
Reno 12:51:32 -25.5 Dark Up 60.7 210.5 Up 12:45:03 - 12:58:02 -1631
Carson City 12:51:30 -25.5 Dark Up 61.0 210.8 Up 12:45:00 - 12:57:59 -1644
Idyllwild 12:50:48 -23.0 Dark Up 64.0 222.4 Up 12:44:18 - 12:57:17 -1646
Lee Vining 12:51:21 -25.0 Dark Up 61.8 213.2 Up 12:44:51 - 12:57:50 -1646
Chiloquin 12:51:56 -26.9 Dark Down 58.7 204.6 Up 12:45:26 - 12:58:25 -1650
Gardnerville 12:51:29 -25.5 Dark Up 61.2 211.1 Up 12:44:59 - 12:57:58 -1651
Klamath Falls 12:51:53 -26.9 Dark Down 59.0 204.9 Up 12:45:24 - 12:58:23 -1659
Portola 12:51:37 -26.0 Dark Up 60.7 209.1 Up 12:45:07 - 12:58:06 -1666
Fall River/Burney 12:51:46 -26.7 Dark Down 60.0 206.4 Up 12:45:16 - 12:58:15 -1681
Gimple 12:51:38 -26.3 Dark Up 60.6 208.1 Up 12:45:09 - 12:58:08 -1681
Greenville 12:51:39 -26.4 Dark Up 60.6 207.9 Up 12:45:09 - 12:58:08 -1687
Quincy 12:51:37 -26.4 Dark Up 60.8 208.1 Up 12:45:08 - 12:58:07 -1695
Wildwood 12:50:55 -24.6 Dark Up 64.7 218.5 Up 12:44:26 - 12:57:25 -1775

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 548141, (2024/02/06 12:49UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:14  0.0 19.55  72
Vindemiatrix   13:02:10.2 +10:57:33  2.8  2.58  82
41 Vir         12:53:49.8 +12:25:05  6.1  1.33  85
PPM 129441     12:55:13.1 +13:03:39  9.4  0.69  85
PPM 129496     12:59:48.1 +13:26:15 10.7  0.49  84
548141         12:57:50.3 +13:18:51 16.1        84
Positions are for J2000

Event circumstances last updated at 2023/05/28 03:40:47 UT

Marc W. Buie, Southwest Research Institute

RECON