RECON: TNO occultation with 535229

Event between (535229) 14YG50 and star GA1120:02962213 with event index number of 2244754

Geocentric closest approach at 2023/02/05 08:01:23 UTC

J2000 position of star is 08:03:53.4 +22:08:30
Equinox of date position of star is 08:05:14.9 +22:04:31
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 13 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 35.1 AU from the Sun and 34.2 AU from the Earth.
Apparent velocity is 24.0 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 168 seconds.
The 1-sigma cross-track error in the shadow position is 2702 km.
The sky-plane scale is 24806.9 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=215.8 km assuming a 5% albedo -- 9.0 sec chord
Diameter=88.1 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 535229, (2023/02/05 08:01UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.6 +27:58:07  1.1  7.23  18
10Mu 2Cnc      08:09:07.2 +21:30:47  5.3  1.06  13
PPM 098288     08:05:12.1 +22:00:16  7.9  0.07  13
535229         08:05:15.2 +22:04:30 17.0        13
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 29.1 km RECON observability=1.0 and success probability=19.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:00:25 -52.9 Dark Up 52.9 227.0 Up 07:45:56 - 08:14:54 -686
Kamloops 08:01:00 -55.2 Dark Up 59.4 206.4 Up 07:46:31 - 08:15:29 -1063
Kelowna 08:00:56 -56.0 Dark Up 59.9 208.6 Up 07:46:27 - 08:15:25 -1126
Peachland 08:00:57 -56.1 Dark Up 60.1 208.1 Up 07:46:28 - 08:15:26 -1140
Summerland 08:00:56 -56.3 Dark Up 60.2 208.4 Up 07:46:27 - 08:15:25 -1153
Penticton 08:00:56 -56.4 Dark Up 60.2 208.7 Up 07:46:27 - 08:15:25 -1158
Oliver 08:00:55 -56.7 Dark Up 60.5 209.0 Up 07:46:26 - 08:15:24 -1191
Anarchist Mountain Observatory 08:00:55 -56.9 Dark Up 60.6 209.4 Up 07:46:26 - 08:15:24 -1204
Okanogan 08:00:55 -57.5 Dark Up 61.2 209.6 Up 07:46:26 - 08:15:24 -1269
Brewster 08:00:55 -57.8 Dark Up 61.5 209.5 Up 07:46:26 - 08:15:24 -1298
Victoria 08:01:06 -57.0 Dark Up 62.2 202.5 Up 07:46:37 - 08:15:35 -1311
Manson/Chelan 08:00:55 -58.0 Dark Up 61.8 209.0 Up 07:46:26 - 08:15:24 -1324
Wenatchee 08:00:55 -58.4 Dark Up 62.3 209.1 Up 07:46:26 - 08:15:24 -1372
Ellensburg 08:00:56 -58.8 Dark Up 62.7 209.1 Up 07:46:27 - 08:15:25 -1416
Yakima 08:00:55 -59.2 Dark Up 63.1 209.5 Up 07:46:26 - 08:15:24 -1455
Toppenish/White Swan 08:00:54 -59.4 Dark Up 63.2 210.0 Up 07:46:25 - 08:15:23 -1474
PNWRO 08:00:49 -59.9 Dark Up 63.0 213.2 Up 07:46:20 - 08:15:18 -1485
The Dalles 08:00:56 -60.1 Dark Up 64.2 209.2 Up 07:46:27 - 08:15:25 -1563
Maupin 08:00:55 -60.6 Dark Up 64.5 209.9 Up 07:46:26 - 08:15:24 -1602
Sisters 08:00:55 -61.4 Dark Up 65.4 209.8 Up 07:46:26 - 08:15:24 -1697
Bend 08:00:54 -61.6 Dark Up 65.5 210.6 Up 07:46:25 - 08:15:23 -1716
Oregon Observatory 08:00:54 -61.8 Dark Up 65.7 210.5 Up 07:46:25 - 08:15:23 -1735
Dunrhomin 07:59:59 -63.8 Dark Up 59.5 242.4 Up 07:45:30 - 08:14:28 -1761
Nikitin 07:59:58 -64.0 Dark Up 59.6 242.6 Up 07:45:29 - 08:14:27 -1780
CU-SBO 07:59:58 -64.0 Dark Up 59.7 242.6 Up 07:45:29 - 08:14:27 -1788
Chiloquin 08:00:54 -63.0 Dark Up 67.0 211.2 Up 07:46:25 - 08:15:23 -1874
Klamath Falls 08:00:53 -63.4 Dark Up 67.3 211.8 Up 07:46:24 - 08:15:22 -1907
Cedarville 08:00:47 -64.3 Dark Up 67.2 216.1 Up 07:46:18 - 08:15:16 -1950
Fall River/Burney 08:00:51 -64.6 Dark Up 68.1 214.2 Up 07:46:22 - 08:15:20 -2020
Gimple 08:00:48 -65.6 Dark Up 68.6 216.7 Up 07:46:19 - 08:15:17 -2104
Greenville 08:00:48 -65.6 Dark Up 68.7 216.5 Up 07:46:19 - 08:15:17 -2105
Quincy 08:00:48 -65.8 Dark Up 68.8 216.8 Up 07:46:19 - 08:15:17 -2126
Portola 08:00:46 -65.9 Dark Up 68.7 218.0 Up 07:46:17 - 08:15:15 -2130
Reno 08:00:44 -66.3 Dark Up 68.6 219.8 Up 07:46:15 - 08:15:13 -2145
Carson City 08:00:43 -66.6 Dark Up 68.9 220.5 Up 07:46:14 - 08:15:12 -2182
Yerington 08:00:41 -66.9 Dark Up 68.7 222.1 Up 07:46:12 - 08:15:10 -2190
Gardnerville 08:00:43 -66.9 Dark Up 69.0 221.0 Up 07:46:14 - 08:15:12 -2206
Hawthorne 08:00:38 -67.4 Dark Up 68.8 224.0 Up 07:46:09 - 08:15:07 -2227
Lee Vining 08:00:39 -67.9 Dark Up 69.4 224.1 Up 07:46:10 - 08:15:08 -2295
Bishop 08:00:36 -68.6 Dark Up 69.5 226.7 Up 07:46:07 - 08:15:05 -2343
Beatty 08:00:30 -69.1 Dark Up 68.8 230.8 Up 07:46:01 - 08:14:59 -2358
Patrick 08:00:19 -70.4 Dark Up 67.8 238.9 Up 07:45:50 - 08:14:48 -2450
Laughlin/Bullhead City 08:00:20 -70.7 Dark Up 68.4 238.2 Up 07:45:51 - 08:14:49 -2491
Lake Havasu City 08:00:18 -71.4 Dark Up 68.6 240.1 Up 07:45:49 - 08:14:47 -2555
George/Scottsdale 08:00:09 -71.8 Dark Up 67.1 245.4 Up 07:45:40 - 08:14:38 -2579
Idyllwild 08:00:26 -72.2 Dark Up 70.6 237.8 Up 07:45:57 - 08:14:55 -2685
Wildwood 08:00:33 -71.8 Dark Up 71.7 233.3 Up 07:46:04 - 08:15:02 -2687
Calipatria 08:00:20 -72.8 Dark Up 70.1 241.3 Up 07:45:51 - 08:14:49 -2724
Yuma 08:00:17 -73.2 Dark Up 69.6 243.8 Up 07:45:48 - 08:14:46 -2749

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 535229, (2023/02/05 08:01UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  7.23  18
10Mu 2Cnc      08:07:45.9 +21:34:53  5.3  1.06  13
PPM 098288     08:03:50.4 +22:04:16  7.9  0.07  13
535229         08:03:53.4 +22:08:30 17.0        13
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:28:43 UT

Marc W. Buie, Southwest Research Institute

RECON