RECON: TNO occultation with 530055

Event between (530055) 10VW224 and star GA1080:01015332 with event index number of 2435744

Geocentric closest approach at 2025/12/13 06:30:41 UTC

J2000 position of star is 05:25:34.3 +19:59:32
Equinox of date position of star is 05:26:56.0 +20:00:40
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 105 degrees from the moon. Moon is 36% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 49.7 AU from the Sun and 48.7 AU from the Earth.
Apparent velocity is 26.4 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 261 seconds.
The 1-sigma cross-track error in the shadow position is 2787 km.
The sky-plane scale is 35320.4 km/arcsec.

The object has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 17.8 sec chord
Diameter=195.4 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 530055, (2025/12/13 06:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.8 +16:33:34  0.8 12.29 117
Alnath         05:27:56.1 +28:37:37  1.6  8.62 105
PPM 120839     05:21:50.2 +19:36:09  6.5  1.31 107
PPM 120910     05:25:29.3 +20:01:16  8.4  0.38 106
PPM 094336     05:25:48.0 +20:09:42  9.6  0.34 106
530055         05:27:06.6 +20:00:49 16.1       105
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 3.4 sigma about the mid-time.
The median site spacing is 32.2 km RECON observability=1.0 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:30:57 -60.6 Dark Down 57.4 167.1 Up 06:15:57 - 06:45:57 13179
Kamloops 06:31:35 -58.0 Dark Down 54.9 142.9 Up 06:16:35 - 06:46:35 13170
Kelowna 06:31:34 -59.0 Dark Down 55.9 143.6 Up 06:16:34 - 06:46:34 13084
Peachland 06:31:34 -59.0 Dark Down 55.9 143.0 Up 06:16:34 - 06:46:34 13077
Summerland 06:31:35 -59.1 Dark Down 56.0 143.0 Up 06:16:35 - 06:46:35 13062
Penticton 06:31:34 -59.2 Dark Down 56.1 143.1 Up 06:16:34 - 06:46:34 13054
Oliver 06:31:35 -59.5 Dark Down 56.4 142.8 Up 06:16:35 - 06:46:35 13021
Victoria 06:31:45 -58.3 Dark Down 55.3 136.5 Up 06:16:45 - 06:46:45 13006
Anarchist Mountain Observatory 06:31:35 -59.7 Dark Down 56.6 143.0 Up 06:16:35 - 06:46:35 13003
Okanogan 06:31:36 -60.1 Dark Down 57.0 142.0 Up 06:16:36 - 06:46:36 12944
Brewster 06:31:37 -60.3 Dark Down 57.2 141.5 Up 06:16:37 - 06:46:37 12921
Manson/Chelan 06:31:38 -60.3 Dark Down 57.2 140.7 Up 06:16:38 - 06:46:38 12906
Wenatchee 06:31:39 -60.5 Dark Down 57.5 140.0 Up 06:16:39 - 06:46:39 12862
Ellensburg 06:31:40 -60.7 Dark Down 57.7 139.2 Up 06:16:40 - 06:46:40 12825
Yakima 06:31:41 -61.0 Dark Down 58.0 138.8 Up 06:16:41 - 06:46:41 12787
Toppenish/White Swan 06:31:41 -61.3 Dark Down 58.2 138.8 Up 06:16:41 - 06:46:41 12764
PNWRO 06:31:38 -62.2 Dark Down 59.2 140.8 Up 06:16:38 - 06:46:38 12710
The Dalles 06:31:44 -61.4 Dark Down 58.4 136.7 Up 06:16:44 - 06:46:44 12698
Maupin 06:31:45 -61.8 Dark Down 58.8 136.4 Up 06:16:45 - 06:46:45 12656
Sisters 06:31:46 -62.1 Dark Down 59.2 134.7 Up 06:16:46 - 06:46:46 12577
Bend 06:31:46 -62.4 Dark Down 59.5 134.8 Up 06:16:46 - 06:46:46 12550
Oregon Observatory 06:31:46 -62.5 Dark Down 59.5 134.4 Up 06:16:46 - 06:46:46 12535
Chiloquin 06:31:50 -63.1 Dark Down 60.2 132.1 Up 06:16:50 - 06:46:50 12410
Klamath Falls 06:31:50 -63.4 Dark Down 60.5 131.8 Up 06:16:50 - 06:46:50 12375
Cedarville 06:31:46 -64.7 Dark Down 61.8 133.4 Up 06:16:46 - 06:46:46 12284
Fall River/Burney 06:31:51 -64.3 Dark Down 61.5 130.8 Up 06:16:51 - 06:46:51 12251
Greenville 06:31:50 -65.1 Dark Down 62.3 130.2 Up 06:16:50 - 06:46:50 12154
Gimple 06:31:50 -65.2 Dark Down 62.4 130.3 Up 06:16:50 - 06:46:50 12152
Quincy 06:31:50 -65.3 Dark Down 62.5 129.9 Up 06:16:50 - 06:46:50 12133
Portola 06:31:49 -65.6 Dark Down 62.8 130.5 Up 06:16:49 - 06:46:49 12114
Reno 06:31:47 -66.2 Dark Down 63.4 131.1 Up 06:16:47 - 06:46:47 12078
Carson City 06:31:48 -66.4 Dark Down 63.6 130.6 Up 06:16:48 - 06:46:48 12041
Gardnerville 06:31:48 -66.6 Dark Down 63.8 130.3 Up 06:16:48 - 06:46:48 12015
Yerington 06:31:46 -66.9 Dark Down 64.1 131.4 Up 06:16:46 - 06:46:46 12012
Dunrhomin 06:31:00 -72.2 Dark Down 69.0 162.5 Up 06:16:00 - 06:46:00 12004
Nikitin 06:31:01 -72.4 Dark Down 69.1 162.3 Up 06:16:01 - 06:46:01 11985
CU-SBO 06:31:02 -72.4 Dark Down 69.2 162.0 Up 06:16:02 - 06:46:02 11979
Hawthorne 06:31:45 -67.5 Dark Down 64.7 131.5 Up 06:16:45 - 06:46:45 11958
Lee Vining 06:31:47 -67.6 Dark Down 64.8 129.8 Up 06:16:47 - 06:46:47 11906
Bishop 06:31:45 -68.4 Dark Down 65.6 130.0 Up 06:16:45 - 06:46:45 11834
Beatty 06:31:40 -69.7 Dark Down 66.9 132.1 Up 06:16:40 - 06:46:40 11765
Patrick 06:31:32 -72.4 Dark Down 69.6 135.1 Up 06:16:32 - 06:46:32 11574
Laughlin/Bullhead City 06:31:35 -72.1 Dark Down 69.4 133.2 Up 06:16:35 - 06:46:35 11557
Wildwood 06:31:49 -70.0 Dark Down 67.5 123.7 Up 06:16:49 - 06:46:49 11495
Lake Havasu City 06:31:35 -72.7 Dark Down 70.0 132.4 Up 06:16:35 - 06:46:35 11482
Idyllwild 06:31:43 -71.5 Dark Down 68.9 126.2 Up 06:16:43 - 06:46:43 11432
George/Scottsdale 06:31:27 -74.8 Dark Down 72.0 136.2 Up 06:16:27 - 06:46:27 11372
Calipatria 06:31:39 -72.7 Dark Down 70.1 127.1 Up 06:16:39 - 06:46:39 11351
Yuma 06:31:38 -73.5 Dark Down 70.9 127.9 Up 06:16:38 - 06:46:38 11294

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 530055, (2025/12/13 06:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.29 117
Alnath         05:26:17.6 +28:36:23  1.6  8.62 105
PPM 120839     05:20:18.3 +19:34:41  6.5  1.31 107
PPM 120910     05:23:57.1 +19:59:56  8.4  0.38 106
PPM 094336     05:24:15.7 +20:08:23  9.6  0.34 106
530055         05:25:34.3 +19:59:32 16.1       105
Positions are for J2000

Event circumstances last updated at 2022/12/25 03:17:48 UT

Marc W. Buie, Southwest Research Institute

RECON