RECON: TNO occultation with 562274

Event between (562274) 15XW379 and star GA1020:03378581 with event index number of 2346378

Geocentric closest approach at 2024/04/05 06:50:22 UTC

J2000 position of star is 10:05:25.8 +13:18:15
Equinox of date position of star is 10:06:43.9 +13:11:08
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 177 degrees from the moon. Moon is 17% illuminated.
Apparent brightness V=19.7

[RECON map]
Object is 18.7 AU from the Sun and 18.0 AU from the Earth.
Apparent velocity is 13.2 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 57 seconds.
The 1-sigma cross-track error in the shadow position is 699 km.
The sky-plane scale is 13075.6 km/arcsec.

The object has an absolute magnitude Hv=6.8
Diameter=250.0 km assuming a 5% albedo -- 19.6 sec chord
Diameter=102.1 km assuming a 30% albedo -- 8.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 562274, (2024/04/05 06:48UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:39.7 +11:50:52  1.3  1.52 176
27Nu Leo       09:59:31.5 +12:19:41  5.3  1.96 176
PPM 127081     10:05:44.8 +13:28:35  8.5  0.38 177
PPM 127100     10:06:57.2 +12:50:35  9.3  0.35 177
PPM 127093     10:06:33.9 +13:05:05 10.8  0.11 177
562274         10:06:44.1 +13:11:07 16.5       177
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 12.7 km RECON observability=1.0 and success probability=41.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:49:46 -31.5 Dark Down 40.1 233.6 Up 06:44:29 - 06:55:03 1768
Kamloops 06:50:33 -30.9 Dark Down 47.5 217.5 Up 06:45:16 - 06:55:50 1223
Kelowna 06:50:25 -31.8 Dark Down 47.8 219.2 Up 06:45:08 - 06:55:42 1201
Peachland 06:50:25 -31.9 Dark Down 48.0 218.8 Up 06:45:08 - 06:55:42 1184
Summerland 06:50:24 -32.0 Dark Down 48.1 219.1 Up 06:45:07 - 06:55:41 1177
Penticton 06:50:23 -32.1 Dark Down 48.1 219.3 Up 06:45:06 - 06:55:40 1176
Oliver 06:50:21 -32.4 Dark Down 48.3 219.5 Up 06:45:04 - 06:55:38 1153
Anarchist Mountain Observatory 06:50:20 -32.6 Dark Down 48.4 219.9 Up 06:45:03 - 06:55:37 1149
Okanogan 06:50:17 -33.2 Dark Down 49.0 220.0 Up 06:45:00 - 06:55:34 1099
Dunrhomin 06:48:30 -43.3 Dark Down 46.1 243.6 Up 06:43:13 - 06:53:47 1084
Brewster 06:50:17 -33.4 Dark Down 49.3 220.0 Up 06:45:00 - 06:55:34 1074
Nikitin 06:48:29 -43.5 Dark Down 46.2 243.7 Up 06:43:12 - 06:53:46 1071
CU-SBO 06:48:29 -43.6 Dark Down 46.3 243.7 Up 06:43:12 - 06:53:46 1063
Manson/Chelan 06:50:18 -33.5 Dark Down 49.6 219.6 Up 06:45:01 - 06:55:35 1047
Wenatchee 06:50:16 -33.9 Dark Down 50.0 219.7 Up 06:44:59 - 06:55:33 1009
Victoria 06:50:35 -32.1 Dark Down 50.4 214.8 Up 06:45:18 - 06:55:52 978
Ellensburg 06:50:14 -34.2 Dark Down 50.5 219.7 Up 06:44:57 - 06:55:31 973
PNWRO 06:50:02 -35.5 Dark Down 50.5 222.7 Up 06:44:45 - 06:55:19 964
Yakima 06:50:12 -34.6 Dark Down 50.8 220.0 Up 06:44:55 - 06:55:29 944
Toppenish/White Swan 06:50:11 -34.8 Dark Down 50.9 220.4 Up 06:44:54 - 06:55:28 935
The Dalles 06:50:11 -35.3 Dark Down 51.8 220.0 Up 06:44:54 - 06:55:28 852
Maupin 06:50:08 -35.7 Dark Down 52.1 220.4 Up 06:44:51 - 06:55:25 827
Sisters 06:50:06 -36.4 Dark Down 53.0 220.5 Up 06:44:49 - 06:55:23 746
Bend 06:50:03 -36.7 Dark Down 53.1 221.0 Up 06:44:46 - 06:55:20 738
Oregon Observatory 06:50:03 -36.8 Dark Down 53.3 221.0 Up 06:44:46 - 06:55:20 721
Chiloquin 06:49:58 -37.9 Dark Down 54.5 221.6 Up 06:44:41 - 06:55:15 608
Cedarville 06:49:45 -39.3 Dark Down 54.4 224.9 Up 06:44:28 - 06:55:02 595
Beatty 06:49:38 -44.6 Dark Down 55.4 234.5 Up 06:44:21 - 06:54:55 591
Klamath Falls 06:49:57 -38.2 Dark Down 54.7 222.0 Up 06:44:40 - 06:55:14 585
Fall River/Burney 06:49:48 -39.4 Dark Down 55.4 223.6 Up 06:44:31 - 06:55:05 510
Hawthorne 06:49:38 -42.5 Dark Down 55.6 230.1 Up 06:44:21 - 06:54:55 478
Yerington 06:49:38 -41.9 Dark Down 55.6 228.9 Up 06:44:21 - 06:54:55 466
Bishop 06:49:38 -43.7 Dark Down 56.1 231.8 Up 06:44:21 - 06:54:55 465
Reno 06:49:38 -41.2 Dark Down 55.6 227.4 Up 06:44:21 - 06:54:55 462
Gimple 06:49:42 -40.4 Dark Down 55.7 225.3 Up 06:44:25 - 06:54:59 462
Greenville 06:49:42 -40.3 Dark Down 55.8 225.2 Up 06:44:25 - 06:54:59 458
Portola 06:49:38 -40.8 Dark Down 55.8 226.2 Up 06:44:21 - 06:54:55 452
Quincy 06:49:41 -40.5 Dark Down 55.9 225.4 Up 06:44:24 - 06:54:58 443
Carson City 06:49:38 -41.6 Dark Down 55.8 227.8 Up 06:44:21 - 06:54:55 441
Gardnerville 06:49:38 -41.8 Dark Down 55.9 228.1 Up 06:44:21 - 06:54:55 429
Lee Vining 06:49:38 -42.9 Dark Down 56.2 230.1 Up 06:44:21 - 06:54:55 425
Patrick 06:48:42 -46.7 Dark Down 54.4 239.5 Up 06:43:25 - 06:53:59 380
George/Scottsdale 06:48:23 -48.8 Dark Down 53.8 243.7 Up 06:43:06 - 06:53:40 331
Laughlin/Bullhead City 06:48:44 -46.8 Dark Down 55.0 239.0 Up 06:43:27 - 06:54:01 330
Lake Havasu City 06:48:40 -47.5 Dark Down 55.2 240.1 Up 06:43:23 - 06:53:57 288
Yuma 06:48:32 -49.1 Dark Down 56.3 242.0 Up 06:43:15 - 06:53:49 130
Calipatria 06:48:39 -48.4 Dark Down 56.7 240.4 Up 06:43:22 - 06:53:56 126
Idyllwild 06:48:48 -47.5 Dark Down 57.3 238.2 Up 06:43:31 - 06:54:05 126
Wildwood 06:49:00 -46.5 Dark Down 58.3 235.4 Up 06:43:43 - 06:54:17 74

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 562274, (2024/04/05 06:48UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  1.52 176
27Nu Leo       09:58:13.3 +12:26:41  5.3  1.96 176
PPM 127081     10:04:26.5 +13:35:42  8.5  0.38 177
PPM 127100     10:05:39.1 +12:57:43  9.3  0.35 177
PPM 127093     10:05:15.7 +13:12:12 10.8  0.11 177
562274         10:05:25.8 +13:18:15 16.5       177
Positions are for J2000

Event circumstances last updated at 2024/03/19 03:34:41 UT

Marc W. Buie, Southwest Research Institute

RECON