RECON: TNO occultation with 612524

Event between (612524) 02VD130 and star GA1160:02843443 with event index number of 2814143

Geocentric closest approach at 2023/04/04 05:36:34 UTC

J2000 position of star is 07:07:15.0 +26:13:02
Equinox of date position of star is 07:08:40.9 +26:10:47
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 66 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 32.6 AU from the Sun and 32.6 AU from the Earth.
Apparent velocity is 5.2 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 633 seconds.
The 1-sigma cross-track error in the shadow position is 1212 km.
The sky-plane scale is 23637.6 km/arcsec.

The object has an absolute magnitude Hv=7.3
Diameter=206.1 km assuming a 5% albedo -- 39.9 sec chord
Diameter=84.1 km assuming a 30% albedo -- 16.3 sec chord
Dynamical classification is 2:1E+4:2II
 
 
 
 
 
 

Star training set for 612524, (2023/04/04 05:50UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:44.2 +27:58:05  1.1  8.65  58
39 Gem         07:00:13.3 +26:02:54  6.5  1.90  68
PPM 097118     07:11:01.0 +25:41:18  7.6  0.72  66
PPM 097017     07:07:11.0 +26:06:11  9.6  0.35  67
PPM 097071     07:09:16.1 +26:05:34 10.3  0.16  66
612524         07:08:41.2 +26:10:46 17.0        66
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 1.4 sigma about the mid-time.
The median site spacing is 13.8 km RECON observability=1.0 and success probability=29.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:41:31 -29.5 Dark Up 35.6 268.0 Up 05:26:31 - 05:56:31 -61
Dunrhomin 05:45:35 -40.7 Dark Up 33.8 277.5 Up 05:30:35 - 06:00:35 -488
Nikitin 05:45:38 -40.9 Dark Up 33.8 277.6 Up 05:30:38 - 06:00:38 -498
CU-SBO 05:45:40 -40.9 Dark Up 33.8 277.6 Up 05:30:40 - 06:00:40 -505
Kelowna 05:41:23 -26.8 Dark Up 44.3 258.4 Up 05:26:23 - 05:56:23 -699
Kamloops 05:41:02 -25.8 Dark Up 44.8 256.8 Up 05:26:02 - 05:56:02 -700
Peachland 05:41:24 -26.8 Dark Up 44.5 258.3 Up 05:26:24 - 05:56:24 -717
Penticton 05:41:28 -27.1 Dark Up 44.4 258.7 Up 05:26:28 - 05:56:28 -718
Summerland 05:41:27 -27.0 Dark Up 44.5 258.5 Up 05:26:27 - 05:56:27 -719
Anarchist Mountain Observatory 05:41:40 -27.6 Dark Up 44.4 259.4 Up 05:26:40 - 05:56:40 -733
Oliver 05:41:35 -27.4 Dark Up 44.5 259.0 Up 05:26:35 - 05:56:35 -734
Okanogan 05:41:54 -28.0 Dark Up 44.6 259.9 Up 05:26:54 - 05:56:54 -774
Brewster 05:41:55 -28.1 Dark Up 44.8 260.0 Up 05:26:55 - 05:56:55 -796
Manson/Chelan 05:41:58 -28.1 Dark Up 45.1 259.9 Up 05:26:58 - 05:56:58 -823
Wenatchee 05:42:06 -28.4 Dark Up 45.2 260.2 Up 05:27:06 - 05:57:06 -854
PNWRO 05:42:42 -30.2 Dark Up 44.4 262.9 Up 05:27:42 - 05:57:42 -857
Ellensburg 05:42:12 -28.6 Dark Up 45.4 260.5 Up 05:27:12 - 05:57:12 -884
Yakima 05:42:20 -29.0 Dark Up 45.5 260.9 Up 05:27:20 - 05:57:20 -906
Toppenish/White Swan 05:42:28 -29.2 Dark Up 45.4 261.3 Up 05:27:28 - 05:57:28 -909
Victoria 05:41:24 -26.1 Dark Up 47.1 256.2 Up 05:26:24 - 05:56:24 -938
The Dalles 05:42:36 -29.4 Dark Up 46.0 261.4 Up 05:27:36 - 05:57:36 -986
Maupin 05:42:44 -29.8 Dark Up 46.0 262.0 Up 05:27:44 - 05:57:44 -1003
Sisters 05:42:57 -30.2 Dark Up 46.4 262.5 Up 05:27:57 - 05:57:57 -1073
Bend 05:43:04 -30.6 Dark Up 46.2 263.0 Up 05:28:04 - 05:58:04 -1073
Oregon Observatory 05:43:08 -30.6 Dark Up 46.3 263.1 Up 05:28:08 - 05:58:08 -1089
Cedarville 05:44:02 -33.1 Dark Up 45.5 266.6 Up 05:29:02 - 05:59:02 -1155
George/Scottsdale 05:47:16 -43.7 Dark Up 37.8 278.9 Up 05:32:16 - 06:02:16 -1168
Patrick 05:46:33 -41.3 Dark Up 39.8 276.5 Up 05:31:33 - 06:01:33 -1176
Chiloquin 05:43:31 -31.4 Dark Up 46.7 264.2 Up 05:28:31 - 05:58:31 -1182
Klamath Falls 05:43:39 -31.7 Dark Up 46.7 264.7 Up 05:28:39 - 05:58:39 -1197
Laughlin/Bullhead City 05:46:34 -41.1 Dark Up 40.4 276.3 Up 05:31:34 - 06:01:34 -1228
Beatty 05:45:53 -38.5 Dark Up 42.4 273.6 Up 05:30:53 - 06:00:53 -1243
Fall River/Burney 05:44:02 -32.8 Dark Up 46.4 266.3 Up 05:29:02 - 05:59:02 -1245
Hawthorne 05:45:08 -36.2 Dark Up 44.1 270.8 Up 05:30:08 - 06:00:08 -1247
Yerington 05:44:58 -35.6 Dark Up 44.6 270.0 Up 05:29:58 - 05:59:58 -1248
Reno 05:44:42 -34.8 Dark Up 45.1 269.0 Up 05:29:42 - 05:59:42 -1250
Lake Havasu City 05:46:48 -41.8 Dark Up 40.1 277.0 Up 05:31:48 - 06:01:48 -1254
Portola 05:44:32 -34.3 Dark Up 45.7 268.3 Up 05:29:32 - 05:59:32 -1268
Carson City 05:44:47 -35.1 Dark Up 45.1 269.4 Up 05:29:47 - 05:59:47 -1270
Gimple 05:44:22 -33.8 Dark Up 46.0 267.6 Up 05:29:22 - 05:59:22 -1270
Greenville 05:44:24 -33.7 Dark Up 46.0 267.6 Up 05:29:24 - 05:59:24 -1274
Gardnerville 05:44:56 -35.3 Dark Up 45.0 269.7 Up 05:29:56 - 05:59:56 -1281
Quincy 05:44:26 -33.9 Dark Up 46.0 267.8 Up 05:29:26 - 05:59:26 -1286
Bishop 05:45:34 -37.3 Dark Up 43.8 272.2 Up 05:30:34 - 06:00:34 -1302
Lee Vining 05:45:14 -36.4 Dark Up 44.5 271.1 Up 05:30:14 - 06:00:14 -1305
Yuma 05:47:21 -43.1 Dark Up 40.0 278.5 Up 05:32:21 - 06:02:21 -1380
Calipatria 05:47:09 -42.2 Dark Up 40.8 277.7 Up 05:32:09 - 06:02:09 -1403
Idyllwild 05:46:49 -41.1 Dark Up 41.9 276.6 Up 05:31:49 - 06:01:49 -1430
Wildwood 05:46:33 -39.7 Dark Up 43.6 275.3 Up 05:31:33 - 06:01:33 -1512

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 612524, (2023/04/04 05:50UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  8.65  58
39 Gem         06:58:47.1 +26:04:53  6.5  1.90  68
PPM 097118     07:09:35.2 +25:43:39  7.6  0.72  66
PPM 097017     07:05:44.9 +26:08:25  9.6  0.35  67
PPM 097071     07:07:50.0 +26:07:52 10.3  0.16  66
612524         07:07:15.0 +26:13:02 17.0        67
Positions are for J2000

Event circumstances last updated at 2023/03/04 03:45:25 UT

Marc W. Buie, Southwest Research Institute

RECON