RECON: TNO occultation with 613100

Event between (613100) 05TN74 and star GA1060:00363542 with event index number of 2820622

Geocentric closest approach at 2026/12/16 09:22:00 UTC

J2000 position of star is 03:20:46.7 +16:33:38
Equinox of date position of star is 03:22:07.5 +16:38:43
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 68 degrees from the moon. Moon is 42% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 32.2 AU from the Sun and 31.3 AU from the Earth.
Apparent velocity is 19.7 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 191 seconds.
The 1-sigma cross-track error in the shadow position is 1519 km.
The sky-plane scale is 22735.8 km/arcsec.

The object has an absolute magnitude Hv=7.5
Diameter=187.1 km assuming a 5% albedo -- 9.6 sec chord
Diameter=76.4 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 

Star training set for 613100, (2026/12/16 09:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.2 +16:33:41  0.8 18.00  85
Menkar         03:03:41.5 +04:11:38  2.5 13.27  61
57Del Ari      03:13:10.5 +19:49:37  4.3  3.84  66
PPM 119006     03:21:31.0 +17:35:50  8.2  0.96  68
PPM 119012     03:21:50.5 +16:31:10 10.0  0.17  67
613100         03:22:17.9 +16:39:22 16.8        68
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 4.7 sigma about the mid-time.
The median site spacing is 34.3 km RECON observability=1.0 and success probability=38.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:18:08 -50.9 Dark Down 26.2 263.4 Low 09:03:08 - 09:33:08 -212
Kamloops 09:18:31 -58.4 Dark Down 35.2 251.9 Up 09:03:31 - 09:33:31 -474
Kelowna 09:18:27 -58.7 Dark Down 34.9 253.2 Up 09:03:27 - 09:33:27 -547
Peachland 09:18:28 -58.9 Dark Down 35.1 253.0 Up 09:03:28 - 09:33:28 -560
Summerland 09:18:27 -59.0 Dark Down 35.1 253.2 Up 09:03:27 - 09:33:27 -574
Penticton 09:18:27 -59.0 Dark Down 35.1 253.4 Up 09:03:27 - 09:33:27 -579
Oliver 09:18:26 -59.2 Dark Down 35.2 253.6 Up 09:03:26 - 09:33:26 -614
Anarchist Mountain Observatory 09:18:25 -59.3 Dark Down 35.1 253.9 Up 09:03:25 - 09:33:25 -629
Okanogan 09:18:24 -59.9 Dark Down 35.4 254.1 Up 09:03:24 - 09:33:24 -694
Victoria 09:18:34 -61.3 Dark Down 37.8 250.6 Up 09:03:34 - 09:33:34 -701
Brewster 09:18:24 -60.2 Dark Down 35.6 254.1 Up 09:03:24 - 09:33:24 -722
Manson/Chelan 09:18:24 -60.5 Dark Down 35.9 253.9 Up 09:03:24 - 09:33:24 -745
Wenatchee 09:18:24 -60.9 Dark Down 36.2 254.1 Up 09:03:24 - 09:33:24 -793
Ellensburg 09:18:23 -61.3 Dark Down 36.4 254.2 Up 09:03:23 - 09:33:23 -835
Yakima 09:18:23 -61.7 Dark Down 36.5 254.5 Up 09:03:23 - 09:33:23 -876
Toppenish/White Swan 09:18:22 -61.7 Dark Down 36.5 254.8 Up 09:03:22 - 09:33:22 -896
PNWRO 09:18:17 -61.3 Dark Down 35.6 256.3 Up 09:03:17 - 09:33:17 -923
The Dalles 09:18:22 -62.7 Dark Down 37.2 254.7 Up 09:03:22 - 09:33:22 -980
Maupin 09:18:21 -62.9 Dark Down 37.3 255.1 Up 09:03:21 - 09:33:21 -1021
Sisters 09:18:20 -63.8 Dark Down 37.8 255.3 Up 09:03:20 - 09:33:20 -1113
Bend 09:18:19 -63.9 Dark Down 37.7 255.7 Up 09:03:19 - 09:33:19 -1136
Oregon Observatory 09:18:20 -64.1 Dark Down 37.8 255.7 Up 09:03:20 - 09:33:20 -1154
Chiloquin 09:18:18 -65.2 Dark Down 38.5 256.4 Up 09:03:18 - 09:33:18 -1292
Klamath Falls 09:18:17 -65.4 Dark Down 38.5 256.7 Up 09:03:17 - 09:33:17 -1327
Dunrhomin 09:17:36 -55.8 Dark Down 26.5 269.8 Low 09:02:36 - 09:32:36 -1354
Nikitin 09:17:36 -55.9 Dark Down 26.5 269.8 Low 09:02:36 - 09:32:36 -1373
CU-SBO 09:17:36 -56.0 Dark Down 26.5 269.8 Low 09:02:36 - 09:32:36 -1381
Cedarville 09:18:12 -65.0 Dark Down 37.5 258.5 Up 09:03:12 - 09:33:12 -1388
Fall River/Burney 09:18:14 -66.0 Dark Down 38.5 257.9 Up 09:03:14 - 09:33:14 -1446
Gimple 09:18:11 -66.3 Dark Down 38.3 259.0 Up 09:03:11 - 09:33:11 -1538
Greenville 09:18:11 -66.4 Dark Down 38.3 259.0 Up 09:03:11 - 09:33:11 -1538
Quincy 09:18:11 -66.5 Dark Down 38.4 259.1 Up 09:03:11 - 09:33:11 -1559
Portola 09:18:09 -66.3 Dark Down 38.0 259.6 Up 09:03:09 - 09:33:09 -1569
Reno 09:18:07 -66.1 Dark Down 37.6 260.3 Up 09:03:07 - 09:33:07 -1592
Carson City 09:18:06 -66.3 Dark Down 37.6 260.5 Up 09:03:06 - 09:33:06 -1629
Yerington 09:18:05 -66.0 Dark Down 37.2 261.1 Up 09:03:05 - 09:33:05 -1645
Gardnerville 09:18:06 -66.4 Dark Down 37.7 260.8 Up 09:03:06 - 09:33:06 -1655
Hawthorne 09:18:02 -65.9 Dark Down 36.9 261.9 Up 09:03:02 - 09:33:02 -1689
Lee Vining 09:18:03 -66.5 Dark Down 37.3 261.9 Up 09:03:03 - 09:33:03 -1753
Bishop 09:18:00 -66.3 Dark Down 36.8 262.9 Up 09:03:00 - 09:33:00 -1810
Beatty 09:17:55 -65.4 Dark Down 35.6 264.3 Up 09:02:55 - 09:32:55 -1845
Patrick 09:17:45 -63.9 Dark Down 33.4 267.1 Up 09:02:45 - 09:32:45 -1973
Laughlin/Bullhead City 09:17:46 -64.5 Dark Down 34.0 266.9 Up 09:02:46 - 09:32:46 -2007
Lake Havasu City 09:17:45 -64.6 Dark Down 33.8 267.5 Up 09:02:45 - 09:32:45 -2076
George/Scottsdale 09:17:38 -62.9 Dark Down 31.8 269.4 Up 09:02:38 - 09:32:38 -2130
Wildwood 09:17:56 -68.0 Dark Down 37.4 265.2 Up 09:02:56 - 09:32:56 -2161
Idyllwild 09:17:50 -66.7 Dark Down 35.8 266.6 Up 09:02:50 - 09:32:50 -2182
Calipatria 09:17:46 -65.9 Dark Down 34.9 267.7 Up 09:02:46 - 09:32:46 -2236
Yuma 09:17:43 -65.4 Dark Down 34.2 268.5 Up 09:02:43 - 09:32:43 -2272

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 613100, (2026/12/16 09:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 18.00  85
Menkar         03:02:16.8 +04:05:21  2.5 13.27  61
57Del Ari      03:11:38.0 +19:43:36  4.3  3.84  66
PPM 119006     03:19:59.3 +17:30:04  8.2  0.96  68
PPM 119012     03:20:19.4 +16:25:25 10.0  0.17  67
613100         03:20:46.7 +16:33:38 16.8        68
Positions are for J2000

Event circumstances last updated at 2023/11/22 04:21:13 UT

Marc W. Buie, Southwest Research Institute

RECON