RECON: TNO occultation with 523644

Event between (523644) 10VX11 and star GA0900:01023249 with event index number of 2382006

Geocentric closest approach at 2023/11/30 08:11:25 UTC

J2000 position of star is 06:06:22.4 +00:44:53
Equinox of date position of star is 06:07:33.9 +00:44:39
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 30 degrees from the moon. Moon is 91% illuminated.
Apparent brightness V=20.9

[RECON map]
Object is 28.3 AU from the Sun and 27.5 AU from the Earth.
Apparent velocity is 21.7 km/sec on the sky relative to the star, or, 3.9 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 1000 km.
The sky-plane scale is 19951.6 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=326.6 km assuming a 5% albedo -- 15.2 sec chord
Diameter=133.3 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523644, (2023/11/30 08:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:28.0 +07:24:34  0.4  7.22  26
34Del Ori      05:33:13.8 -00:17:00  2.2  8.66  35
60 Ori         06:00:03.4 +00:33:12  5.2  1.90  31
PPM 149877     06:06:36.6 +00:36:33  8.4  0.28  30
PPM 149899     06:07:37.6 +00:51:35  9.2  0.12  30
523644         06:07:36.4 +00:44:38 16.4        30
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 21.1 km RECON observability=1.0 and success probability=39.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:11:48 -60.6 Dark Up 37.3 154.5 Up 08:06:35 - 08:17:02 1038
Kelowna 08:11:47 -61.3 Dark Up 38.2 155.3 Up 08:06:34 - 08:17:01 974
Peachland 08:11:48 -61.5 Dark Up 38.3 154.9 Up 08:06:34 - 08:17:01 970
Summerland 08:11:48 -61.6 Dark Up 38.4 155.0 Up 08:06:35 - 08:17:02 959
Sleaford 08:11:02 -55.9 Dark Up 38.4 172.6 Up 08:05:49 - 08:16:16 956
Penticton 08:11:48 -61.6 Dark Up 38.5 155.1 Up 08:06:34 - 08:17:01 953
Victoria 08:12:02 -63.0 Dark Up 38.3 150.1 Up 08:06:48 - 08:17:15 933
Oliver 08:11:49 -62.0 Dark Up 38.8 155.0 Up 08:06:35 - 08:17:02 929
Anarchist Mountain Observatory 08:11:48 -62.1 Dark Up 39.0 155.1 Up 08:06:35 - 08:17:02 916
Okanogan 08:11:50 -62.8 Dark Up 39.6 154.7 Up 08:06:37 - 08:17:04 874
Brewster 08:11:51 -63.1 Dark Up 39.7 154.3 Up 08:06:38 - 08:17:05 858
Manson/Chelan 08:11:53 -63.3 Dark Up 39.8 153.8 Up 08:06:39 - 08:17:06 848
Wenatchee 08:11:54 -63.8 Dark Up 40.2 153.4 Up 08:06:41 - 08:17:08 817
Ellensburg 08:11:56 -64.3 Dark Up 40.5 153.0 Up 08:06:42 - 08:17:09 791
Yakima 08:11:56 -64.7 Dark Up 40.9 152.8 Up 08:06:43 - 08:17:10 763
Toppenish/White Swan 08:11:56 -64.8 Dark Up 41.1 152.9 Up 08:06:43 - 08:17:10 745
The Dalles 08:12:00 -65.7 Dark Up 41.5 151.6 Up 08:06:47 - 08:17:14 699
PNWRO 08:11:52 -65.0 Dark Up 41.9 154.7 Up 08:06:39 - 08:17:06 699
Maupin 08:12:01 -66.1 Dark Up 42.0 151.6 Up 08:06:48 - 08:17:15 668
Sisters 08:12:04 -67.0 Dark Up 42.6 150.6 Up 08:06:51 - 08:17:18 610
Bend 08:12:04 -67.2 Dark Up 42.9 150.8 Up 08:06:50 - 08:17:17 589
Oregon Observatory 08:12:05 -67.4 Dark Up 43.0 150.6 Up 08:06:51 - 08:17:18 578
Chiloquin 08:12:08 -68.8 Dark Up 44.0 149.4 Up 08:06:55 - 08:17:22 484
Klamath Falls 08:12:09 -69.1 Dark Up 44.3 149.4 Up 08:06:55 - 08:17:22 456
Cedarville 08:12:05 -69.5 Dark Up 45.5 151.1 Up 08:06:51 - 08:17:18 380
Fall River/Burney 08:12:10 -70.2 Dark Up 45.4 149.3 Up 08:06:56 - 08:17:23 359
Greenville 08:12:10 -71.0 Dark Up 46.4 149.4 Up 08:06:56 - 08:17:23 281
Gimple 08:12:09 -71.0 Dark Up 46.4 149.5 Up 08:06:56 - 08:17:23 279
Quincy 08:12:10 -71.2 Dark Up 46.6 149.3 Up 08:06:57 - 08:17:24 264
Portola 08:12:09 -71.2 Dark Up 46.9 149.9 Up 08:06:55 - 08:17:22 248
Reno 08:12:07 -71.3 Dark Up 47.3 150.6 Up 08:06:53 - 08:17:20 217
Carson City 08:12:07 -71.7 Dark Up 47.7 150.4 Up 08:06:54 - 08:17:21 187
Gardnerville 08:12:07 -71.9 Dark Up 47.9 150.4 Up 08:06:54 - 08:17:21 167
Yerington 08:12:05 -71.7 Dark Up 48.1 151.2 Up 08:06:52 - 08:17:19 162
Hawthorne 08:12:04 -72.0 Dark Up 48.7 151.7 Up 08:06:51 - 08:17:18 116
Lee Vining 08:12:07 -72.6 Dark Up 49.0 150.7 Up 08:06:53 - 08:17:20 77
Dunrhomin 08:11:11 -64.5 Dark Up 50.2 172.2 Up 08:05:58 - 08:16:25 56
Nikitin 08:11:12 -64.6 Dark Up 50.4 172.1 Up 08:05:58 - 08:16:25 41
CU-SBO 08:11:12 -64.7 Dark Up 50.5 172.0 Up 08:05:59 - 08:16:26 37
Bishop 08:12:05 -73.0 Dark Up 49.8 151.4 Up 08:06:52 - 08:17:19 15
Beatty 08:12:00 -72.8 Dark Up 50.8 153.5 Up 08:06:46 - 08:17:13 -49
Patrick 08:11:51 -72.7 Dark Up 53.1 157.0 Up 08:06:37 - 08:17:04 -222
Laughlin/Bullhead City 08:11:54 -73.2 Dark Up 53.1 155.8 Up 08:06:40 - 08:17:07 -232
Wildwood 08:12:11 -76.0 Dark Up 52.6 149.1 Up 08:06:58 - 08:17:25 -262
Lake Havasu City 08:11:54 -73.6 Dark Up 53.8 155.8 Up 08:06:40 - 08:17:07 -296
Idyllwild 08:12:05 -75.4 Dark Up 53.6 151.7 Up 08:06:51 - 08:17:18 -323
Calipatria 08:12:01 -75.3 Dark Up 54.6 153.1 Up 08:06:47 - 08:17:14 -398
George/Scottsdale 08:11:45 -72.7 Dark Up 55.3 159.4 Up 08:06:32 - 08:16:59 -404
Yuma 08:11:58 -75.1 Dark Up 55.3 154.3 Up 08:06:44 - 08:17:11 -451

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 523644, (2023/11/30 08:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.22  26
34Del Ori      05:32:00.4 -00:17:57  2.2  8.66  35
60 Ori         05:58:49.6 +00:33:11  5.2  1.90  31
PPM 149877     06:05:22.7 +00:36:46  8.4  0.28  30
PPM 149899     06:06:23.6 +00:51:50  9.2  0.12  30
523644         06:06:22.4 +00:44:53 16.4        30
Positions are for J2000

Event circumstances last updated at 2023/02/10 04:00:18 UT

Marc W. Buie, Southwest Research Institute

RECON