RECON: TNO occultation with 174567

Event between (174567) Varda and star GA0880:06649782 with event index number of 2167113

Geocentric closest approach at 2026/06/17 05:54:58 UTC

J2000 position of star is 17:58:53.2 -01:30:39
Equinox of date position of star is 18:00:08.3 -01:30:40
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon. Moon is 7% illuminated.
Apparent brightness V=20.1

[RECON map]
Object is 45.6 AU from the Sun and 44.7 AU from the Earth.
Apparent velocity is 24.9 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 169 seconds.
The 1-sigma cross-track error in the shadow position is 1629 km.
The sky-plane scale is 32424.3 km/arcsec.

The object has an absolute magnitude Hv=3.5
Diameter=1259.0 km assuming a 5% albedo -- 48.9 sec chord
Diameter=514.0 km assuming a 30% albedo -- 20.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 174567, (2026/06/17 05:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.1 -26:29:18  0.9 32.91 134
60Bet Oph      17:44:46.9 +04:33:29  2.8  7.20 137
PPM 164879     17:58:25.7 +00:03:54  5.9  1.64 143
PPM 180223     18:04:09.6 -01:20:04  8.2  0.99 145
PPM 180205     17:59:08.8 -01:45:57 10.0  0.38 144
PPM 180208     17:59:49.9 -01:25:31 10.5  0.14 144
174567         18:00:15.5 -01:30:40 16.8       144
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 0.0 km RECON observability=0.7 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:56:03 -13.1 AT Down 33.5 154.4 Up 05:41:28 - 06:10:38 5476
Kamloops 05:56:34 -10.9 NT Up 29.7 138.1 Low 05:41:59 - 06:11:09 5336
Kelowna 05:56:34 -11.9 NT Up 30.7 138.8 Up 05:41:59 - 06:11:09 5281
Peachland 05:56:34 -11.9 NT Up 30.7 138.4 Up 05:41:59 - 06:11:09 5273
Summerland 05:56:34 -12.1 AT Up 30.8 138.4 Up 05:41:59 - 06:11:09 5263
Penticton 05:56:34 -12.2 AT Up 30.9 138.5 Up 05:41:59 - 06:11:09 5258
Oliver 05:56:34 -12.5 AT Up 31.2 138.4 Up 05:41:59 - 06:11:09 5233
Anarchist Mountain Observatory 05:56:34 -12.7 AT Up 31.4 138.5 Up 05:41:59 - 06:11:09 5222
Okanogan 05:56:34 -13.2 AT Up 31.8 138.0 Up 05:41:59 - 06:11:09 5175
Victoria 05:56:52 -11.8 NT Up 29.9 134.2 Low 05:42:17 - 06:11:27 5169
Brewster 05:56:34 -13.4 AT Up 31.9 137.7 Up 05:41:59 - 06:11:09 5155
Manson/Chelan 05:56:34 -13.4 AT Up 31.9 137.2 Up 05:41:59 - 06:11:09 5140
Wenatchee 05:56:34 -13.8 AT Up 32.1 136.9 Up 05:41:59 - 06:11:09 5106
Ellensburg 05:56:34 -14.1 AT Up 32.3 136.4 Up 05:41:59 - 06:11:09 5076
Yakima 05:56:49 -14.4 AT Up 32.7 136.3 Up 05:42:14 - 06:11:24 5034
Toppenish/White Swan 05:56:49 -14.7 AT Up 32.9 136.4 Up 05:42:14 - 06:11:24 5018
PNWRO 05:56:34 -15.5 AT Up 33.8 137.7 Up 05:41:59 - 06:11:09 5002
The Dalles 05:56:52 -15.1 AT Up 33.1 135.2 Up 05:42:17 - 06:11:27 4955
Maupin 05:56:53 -15.5 AT Up 33.4 135.1 Up 05:42:18 - 06:11:28 4923
Sisters 05:56:55 -16.1 AT Up 33.8 134.2 Up 05:42:20 - 06:11:30 4852
Bend 05:56:55 -16.4 AT Up 34.1 134.4 Up 05:42:20 - 06:11:30 4834
Oregon Observatory 05:56:56 -16.5 AT Up 34.2 134.2 Up 05:42:21 - 06:11:31 4820
Chiloquin 05:56:59 -17.4 AT Down 34.9 133.1 Up 05:42:24 - 06:11:34 4711
Klamath Falls 05:56:59 -17.8 AT Down 35.1 133.0 Up 05:42:24 - 06:11:34 4684
Cedarville 05:56:56 -19.0 Dark Down 36.5 134.3 Up 05:42:21 - 06:11:31 4632
Fall River/Burney 05:57:00 -18.9 Dark Down 36.1 132.8 Up 05:42:25 - 06:11:35 4587
Dunrhomin 05:56:14 -24.6 Dark Down 44.3 151.0 Up 05:41:39 - 06:10:49 4582
Nikitin 05:56:14 -24.7 Dark Down 44.5 150.9 Up 05:41:39 - 06:10:49 4567
CU-SBO 05:56:14 -24.8 Dark Down 44.5 150.7 Up 05:41:39 - 06:10:49 4561
Gimple 05:57:00 -19.9 Dark Down 37.1 132.8 Up 05:42:25 - 06:11:35 4512
Greenville 05:57:01 -19.9 Dark Down 37.0 132.8 Up 05:42:26 - 06:11:36 4512
Quincy 05:57:01 -20.0 Dark Down 37.2 132.6 Up 05:42:26 - 06:11:36 4495
Portola 05:57:00 -20.3 Dark Down 37.5 133.1 Up 05:42:25 - 06:11:35 4487
Reno 05:56:58 -20.8 Dark Down 38.0 133.6 Up 05:42:23 - 06:11:33 4466
Carson City 05:56:59 -21.1 Dark Down 38.3 133.4 Up 05:42:24 - 06:11:34 4436
Yerington 05:56:57 -21.5 Dark Down 38.8 134.0 Up 05:42:22 - 06:11:32 4421
Gardnerville 05:56:59 -21.4 Dark Down 38.5 133.3 Up 05:42:24 - 06:11:34 4415
Hawthorne 05:56:57 -22.2 Dark Down 39.4 134.3 Up 05:42:22 - 06:11:32 4383
Lee Vining 05:56:59 -22.5 Dark Down 39.5 133.4 Up 05:42:24 - 06:11:34 4333
Bishop 05:56:57 -23.3 Dark Down 40.4 133.8 Up 05:42:22 - 06:11:32 4282
Beatty 05:56:53 -24.3 Dark Down 41.6 135.3 Up 05:42:18 - 06:11:28 4248
Patrick 05:56:34 -26.6 Dark Down 44.2 137.5 Up 05:41:59 - 06:11:09 4137
Laughlin/Bullhead City 05:56:34 -26.6 Dark Down 44.0 136.6 Up 05:41:59 - 06:11:09 4117
Lake Havasu City 05:56:34 -27.3 Dark Down 44.7 136.4 Up 05:41:59 - 06:11:09 4057
Wildwood 05:57:02 -26.0 Dark Down 42.5 131.5 Up 05:42:27 - 06:11:37 3987
George/Scottsdale 05:56:34 -28.9 Dark Down 46.6 138.8 Up 05:41:59 - 06:11:09 3985
Idyllwild 05:56:57 -27.1 Dark Down 43.8 133.3 Up 05:42:22 - 06:11:32 3963
Calipatria 05:56:54 -28.1 Dark Down 45.0 134.1 Up 05:42:19 - 06:11:29 3911
Yuma 05:56:51 -28.8 Dark Down 45.8 134.8 Up 05:42:16 - 06:11:26 3874

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 174567, (2026/06/17 05:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.91 134
60Bet Oph      17:43:28.3 +04:34:06  2.8  7.20 137
PPM 164879     17:57:04.3 +00:03:59  5.9  1.64 143
PPM 180223     18:02:47.4 -01:20:12  8.2  0.99 145
PPM 180205     17:57:46.4 -01:45:54 10.0  0.38 144
PPM 180208     17:58:27.7 -01:25:29 10.5  0.14 144
174567         17:58:53.2 -01:30:39 16.8       144
Positions are for J2000

Event circumstances last updated at 2024/02/28 22:13:14 UT

Marc W. Buie, Southwest Research Institute

RECON