RECON: TNO occultation with 13CD223

Event between 13CD223 and star GA1020:03452655 with event index number of 2047282

Geocentric closest approach at 2026/01/30 08:15:06 UTC

J2000 position of star is 10:59:43.3 +12:14:32
Equinox of date position of star is 11:00:53.5 +12:07:20
Stellar brightness G=12.3, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 65 degrees from the moon. Moon is 91% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 48.2 AU from the Sun and 47.3 AU from the Earth.
The TNO is moving 22.0 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 283 seconds.
The 1-sigma cross-track error in the shadow position is 4439 km.
The sky-plane scale is 34323.5 km/arcsec.

The TNO has an absolute magnitude Hv=5.7
Diameter=428.6 km assuming a 5% albedo -- 19.5 sec chord
Diameter=175.0 km assuming a 30% albedo -- 8.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 13CD223, (2026/01/30 08:15UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:45.6 +11:50:19  1.3 12.56  54
68Del Leo      11:15:29.5 +20:22:50  2.6  8.97  65
53 Leo         10:50:37.6 +10:24:24  5.3  3.08  64
PPM 127948     11:05:55.4 +12:31:34  7.0  1.25  66
PPM 127882     11:00:48.3 +11:45:20  9.2  0.35  65
PPM 127895     11:01:36.0 +12:14:55 10.2  0.19  65
13CD223        11:01:05.5 +12:06:07 12.3        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 3.2 sigma about the mid-time.
The median site spacing is 28.3 km RECON observability=1.0 and success probability=13.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:17:17 -53.5 Dark Up 47.9 154.9 Up 08:02:17 - 08:32:17 961
Kamloops 08:17:55 -56.9 Dark Up 43.9 135.3 Up 08:02:55 - 08:32:55 504
Kelowna 08:17:53 -57.7 Dark Up 44.9 135.8 Up 08:02:53 - 08:32:53 445
Peachland 08:17:54 -57.9 Dark Up 44.8 135.4 Up 08:02:54 - 08:32:54 428
Summerland 08:17:54 -58.0 Dark Up 45.0 135.4 Up 08:02:54 - 08:32:54 415
Penticton 08:17:54 -58.1 Dark Up 45.1 135.5 Up 08:02:54 - 08:32:54 411
Oliver 08:17:54 -58.4 Dark Up 45.3 135.2 Up 08:02:54 - 08:32:54 377
Anarchist Mountain Observatory 08:17:53 -58.6 Dark Up 45.6 135.4 Up 08:02:53 - 08:32:53 365
Tonasket 08:17:53 -58.9 Dark Up 45.7 135.0 Up 08:02:53 - 08:32:53 334
Okanogan 08:17:53 -59.2 Dark Up 45.9 134.6 Up 08:02:53 - 08:32:53 298
Brewster 08:17:54 -59.5 Dark Up 46.0 134.2 Up 08:02:54 - 08:32:54 267
Manson/Chelan 08:17:55 -59.7 Dark Up 46.0 133.6 Up 08:02:55 - 08:32:55 239
Victoria 08:18:04 -59.0 Dark Up 43.9 130.2 Up 08:03:04 - 08:33:04 236
Wenatchee 08:17:56 -60.2 Dark Up 46.2 133.0 Up 08:02:56 - 08:32:56 189
Ellensburg 08:17:56 -60.6 Dark Up 46.4 132.4 Up 08:02:56 - 08:32:56 144
Yakima 08:17:56 -61.0 Dark Up 46.6 132.1 Up 08:02:56 - 08:32:56 103
Toppenish/White Swan 08:17:56 -61.2 Dark Up 46.9 132.1 Up 08:02:56 - 08:32:56 86
PNWRO 08:17:51 -61.6 Dark Up 47.9 133.6 Up 08:02:51 - 08:32:51 83
Goldendale 08:17:57 -61.8 Dark Up 47.0 131.2 Up 08:02:57 - 08:32:57 22
The Dalles 08:17:58 -62.0 Dark Up 47.0 130.5 Up 08:02:58 - 08:32:58 -9
Maupin 08:17:57 -62.4 Dark Up 47.3 130.3 Up 08:02:57 - 08:32:57 -48
Dunrhomin 08:17:05 -63.6 Dark Up 58.6 148.4 Up 08:02:05 - 08:32:05 -106
CU-SBO 08:17:05 -63.8 Dark Up 58.7 148.0 Up 08:02:05 - 08:32:05 -133
Sisters 08:17:59 -63.3 Dark Up 47.6 129.0 Up 08:02:59 - 08:32:59 -147
Bend 08:17:58 -63.6 Dark Up 47.9 129.1 Up 08:02:58 - 08:32:58 -165
Oregon Observatory 08:17:58 -63.7 Dark Up 47.9 128.8 Up 08:02:58 - 08:32:58 -185
North Lake 08:17:56 -64.4 Dark Up 48.6 128.9 Up 08:02:56 - 08:32:56 -238
Chiloquin 08:17:59 -65.0 Dark Up 48.5 127.1 Up 08:02:59 - 08:32:59 -328
Lakeview 08:17:55 -65.4 Dark Up 49.6 128.6 Up 08:02:55 - 08:32:55 -333
Klamath Falls 08:17:59 -65.4 Dark Up 48.8 126.9 Up 08:02:59 - 08:32:59 -361
Cedarville 08:17:54 -66.1 Dark Up 50.1 128.2 Up 08:02:54 - 08:32:54 -395
Fall River/Burney 08:17:58 -66.6 Dark Up 49.7 126.3 Up 08:02:58 - 08:32:58 -473
Susanville 08:17:55 -67.2 Dark Up 50.5 126.5 Up 08:02:55 - 08:32:55 -520
Gimple 08:17:56 -67.5 Dark Up 50.5 126.0 Up 08:02:56 - 08:32:56 -553
Greenville 08:17:56 -67.5 Dark Up 50.5 125.9 Up 08:02:56 - 08:32:56 -555
Quincy 08:17:55 -67.7 Dark Up 50.6 125.7 Up 08:02:55 - 08:32:55 -576
Portola 08:17:54 -67.8 Dark Up 51.0 126.2 Up 08:02:54 - 08:32:54 -577
Reno 08:17:52 -68.0 Dark Up 51.5 126.7 Up 08:02:52 - 08:32:52 -589
Carson City 08:17:52 -68.4 Dark Up 51.8 126.3 Up 08:02:52 - 08:32:52 -625
Yerington 08:17:50 -68.6 Dark Up 52.3 126.9 Up 08:02:50 - 08:32:50 -630
Gardnerville 08:17:51 -68.6 Dark Up 51.9 126.1 Up 08:02:51 - 08:32:51 -649
Hawthorne 08:17:47 -69.0 Dark Up 52.9 127.1 Up 08:02:47 - 08:32:47 -664
Tonopah 08:17:43 -69.3 Dark Up 54.0 128.3 Up 08:02:43 - 08:32:43 -675
Lee Vining 08:17:49 -69.6 Dark Up 52.9 125.9 Up 08:02:49 - 08:32:49 -734
Bishop 08:17:47 -70.1 Dark Up 53.7 126.1 Up 08:02:47 - 08:32:47 -778
Beatty 08:17:41 -70.3 Dark Up 55.0 127.6 Up 08:02:41 - 08:32:41 -782
Indian Springs 08:17:37 -70.5 Dark Up 55.9 128.7 Up 08:02:37 - 08:32:37 -786
Henderson 08:17:34 -70.8 Dark Up 56.7 129.0 Up 08:02:34 - 08:32:34 -821
Patrick 08:17:29 -71.1 Dark Up 57.7 129.7 Up 08:02:29 - 08:32:29 -853
Kingman/Dolan Springs 08:17:30 -71.4 Dark Up 57.8 129.2 Up 08:02:30 - 08:32:30 -881
Laughlin/Bullhead City 08:17:32 -71.5 Dark Up 57.5 128.5 Up 08:02:32 - 08:32:32 -899
Mohave Valley 08:17:31 -71.8 Dark Up 57.6 128.1 Up 08:02:31 - 08:32:31 -927
Lake Havasu City 08:17:31 -72.1 Dark Up 58.0 128.0 Up 08:02:31 - 08:32:31 -961
George/Scottsdale 08:17:20 -71.9 Dark Up 60.1 130.4 Up 08:02:20 - 08:32:20 -966
Parker 08:17:30 -72.4 Dark Up 58.3 127.5 Up 08:02:30 - 08:32:30 -996
Idyllwild 08:17:38 -73.4 Dark Up 56.9 123.9 Up 08:02:38 - 08:32:38 -1108
Wildwood 08:17:45 -73.4 Dark Up 55.4 122.0 Up 08:02:45 - 08:32:45 -1122
Calipatria 08:17:33 -73.7 Dark Up 58.0 124.6 Up 08:02:33 - 08:32:33 -1137
Yuma 08:17:29 -73.9 Dark Up 58.9 125.2 Up 08:02:29 - 08:32:29 -1156

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 13CD223, (2026/01/30 08:15UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 12.56  54
68Del Leo      11:14:06.7 +20:31:23  2.6  8.97  65
53 Leo         10:49:15.4 +10:32:42  5.3  3.08  64
PPM 127948     11:04:33.4 +12:40:02  7.0  1.25  66
PPM 127882     10:59:26.2 +11:53:45  9.2  0.35  65
PPM 127895     11:00:13.9 +12:23:21 10.2  0.19  65
13CD223        10:59:43.3 +12:14:32 12.3        65
Positions are for J2000

Event circumstances last updated at 2022/04/13 23:09:33 UT

Marc W. Buie, Southwest Research Institute

RECON