RECON: TNO occultation with 530055

Event between (530055) 10VW224 and star GA1080:00971388 with event index number of 2435751

Geocentric closest approach at 2026/02/09 07:45:50 UTC

J2000 position of star is 05:21:59.1 +19:59:32
Equinox of date position of star is 05:23:20.8 +20:00:47
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 146 degrees from the moon. Moon is 52% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 49.7 AU from the Sun and 49.2 AU from the Earth.
Apparent velocity is 12.0 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 558 seconds.
The 1-sigma cross-track error in the shadow position is 2305 km.
The sky-plane scale is 35658.4 km/arcsec.

The object has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 39.1 sec chord
Diameter=195.4 km assuming a 30% albedo -- 16.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 530055, (2026/02/09 07:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:25.3 +16:33:35  0.8 11.47 156
Alnath         05:27:56.7 +28:37:38  1.6  8.67 146
PPM 120839     05:21:50.8 +19:36:10  6.5  0.57 147
PPM 120879     05:23:47.2 +19:51:27  8.3  0.17 146
530055         05:23:31.9 +20:00:57 15.8       146
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 1.6 sigma about the mid-time.
The median site spacing is 20.3 km RECON observability=1.0 and success probability=9.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:41:21 -52.3 Dark Down 28.9 265.8 Low 07:26:21 - 07:56:21 5295
Kamloops 07:41:49 -53.3 Dark Down 37.9 254.5 Up 07:26:49 - 07:56:49 4848
Kelowna 07:41:42 -54.2 Dark Down 37.6 255.9 Up 07:26:42 - 07:56:42 4807
Peachland 07:41:40 -54.3 Dark Down 37.8 255.7 Up 07:26:40 - 07:56:40 4791
Summerland 07:41:40 -54.5 Dark Down 37.8 255.9 Up 07:26:40 - 07:56:40 4782
Penticton 07:41:39 -54.5 Dark Down 37.7 256.1 Up 07:26:39 - 07:56:39 4779
Oliver 07:41:37 -54.9 Dark Down 37.8 256.3 Up 07:26:37 - 07:56:37 4752
Anarchist Mountain Observatory 07:41:35 -55.1 Dark Down 37.7 256.6 Up 07:26:35 - 07:56:35 4743
Okanogan 07:41:32 -55.7 Dark Down 38.0 256.9 Up 07:26:32 - 07:56:32 4687
Brewster 07:41:31 -55.9 Dark Down 38.2 256.9 Up 07:26:31 - 07:56:31 4660
Manson/Chelan 07:41:31 -56.0 Dark Down 38.5 256.8 Up 07:26:31 - 07:56:31 4634
Victoria 07:41:46 -54.8 Dark Down 40.4 253.4 Up 07:26:46 - 07:56:46 4606
Wenatchee 07:41:29 -56.5 Dark Down 38.7 257.0 Up 07:26:29 - 07:56:29 4592
Ellensburg 07:41:27 -56.8 Dark Down 39.0 257.1 Up 07:26:27 - 07:56:27 4553
Yakima 07:41:24 -57.2 Dark Down 39.1 257.4 Up 07:26:24 - 07:56:24 4519
PNWRO 07:41:15 -58.1 Dark Down 38.1 259.2 Up 07:26:15 - 07:56:15 4514
Toppenish/White Swan 07:41:23 -57.5 Dark Down 39.0 257.7 Up 07:26:23 - 07:56:23 4506
Dunrhomin 07:39:58 -63.8 Dark Down 28.7 272.7 Low 07:24:58 - 07:54:58 4427
The Dalles 07:41:21 -58.0 Dark Down 39.7 257.7 Up 07:26:21 - 07:56:21 4421
Nikitin 07:39:58 -64.0 Dark Down 28.8 272.8 Low 07:24:58 - 07:54:58 4411
CU-SBO 07:39:58 -64.1 Dark Down 28.8 272.7 Low 07:24:58 - 07:54:58 4403
Maupin 07:41:18 -58.5 Dark Down 39.8 258.1 Up 07:26:18 - 07:56:18 4389
Sisters 07:41:13 -59.2 Dark Down 40.3 258.4 Up 07:26:13 - 07:56:13 4302
Bend 07:41:13 -59.5 Dark Down 40.2 258.8 Up 07:26:13 - 07:56:13 4289
Oregon Observatory 07:41:12 -59.6 Dark Down 40.3 258.8 Up 07:26:12 - 07:56:12 4271
Chiloquin 07:41:06 -60.7 Dark Down 40.9 259.6 Up 07:26:06 - 07:56:06 4147
Klamath Falls 07:41:05 -61.1 Dark Down 40.9 259.9 Up 07:26:05 - 07:56:05 4119
Cedarville 07:40:53 -62.1 Dark Down 39.8 261.7 Up 07:25:53 - 07:55:53 4102
Fall River/Burney 07:40:56 -62.3 Dark Down 40.8 261.2 Up 07:25:56 - 07:55:56 4026
Gimple 07:40:48 -63.3 Dark Down 40.6 262.4 Up 07:25:48 - 07:55:48 3960
Greenville 07:40:49 -63.2 Dark Down 40.6 262.3 Up 07:25:49 - 07:55:49 3958
Portola 07:40:46 -63.7 Dark Down 40.3 262.9 Up 07:25:46 - 07:55:46 3943
Quincy 07:40:47 -63.4 Dark Down 40.6 262.5 Up 07:25:47 - 07:55:47 3940
Reno 07:40:41 -64.1 Dark Down 39.9 263.6 Up 07:25:41 - 07:55:41 3937
Yerington 07:40:36 -64.8 Dark Down 39.4 264.5 Up 07:25:36 - 07:55:36 3907
Carson City 07:40:40 -64.4 Dark Down 39.9 263.9 Up 07:25:40 - 07:55:40 3906
Gardnerville 07:40:37 -64.7 Dark Down 39.9 264.1 Up 07:25:37 - 07:55:37 3885
Hawthorne 07:40:31 -65.3 Dark Down 39.1 265.2 Up 07:25:31 - 07:55:31 3880
Lee Vining 07:40:30 -65.7 Dark Down 39.5 265.3 Up 07:25:30 - 07:55:30 3816
Beatty 07:40:15 -67.3 Dark Down 37.7 267.7 Up 07:25:15 - 07:55:15 3789
Bishop 07:40:23 -66.5 Dark Down 39.0 266.3 Up 07:25:23 - 07:55:23 3782
Patrick 07:39:57 -69.1 Dark Down 35.5 270.5 Up 07:24:57 - 07:54:57 3742
Laughlin/Bullhead City 07:39:57 -69.3 Dark Down 36.1 270.2 Up 07:24:57 - 07:54:57 3698
George/Scottsdale 07:39:40 -70.9 Dark Down 33.8 272.7 Up 07:24:40 - 07:54:40 3651
Lake Havasu City 07:39:53 -70.0 Dark Down 35.9 270.9 Up 07:24:53 - 07:54:53 3644
Idyllwild 07:39:58 -70.3 Dark Down 37.8 270.1 Up 07:24:58 - 07:54:58 3500
Calipatria 07:39:52 -71.1 Dark Down 36.8 271.2 Up 07:24:52 - 07:54:52 3480
Wildwood 07:40:08 -69.5 Dark Down 39.4 268.8 Up 07:25:08 - 07:55:08 3475
Yuma 07:39:45 -71.7 Dark Down 36.1 272.0 Up 07:24:45 - 07:54:45 3468

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, (2026/02/09 07:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 11.47 156
Alnath         05:26:17.6 +28:36:23  1.6  8.67 146
PPM 120839     05:20:18.3 +19:34:41  6.5  0.57 147
PPM 120879     05:22:14.5 +19:50:03  8.3  0.17 146
530055         05:21:59.1 +19:59:32 15.8       146
Positions are for J2000

Event circumstances last updated at 2022/12/25 03:34:30 UT

Marc W. Buie, Southwest Research Institute

RECON