RECON: TNO occultation with 308634

Event between (308634) 05XU100 and star GA0920:03682551 with event index number of 2743309

Geocentric closest approach at 2029/03/27 08:27:04 UTC

J2000 position of star is 10:53:06.1 +03:22:08
Equinox of date position of star is 10:54:18.1 +03:14:42
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 15 degrees from the moon. Moon is 89% illuminated.
Apparent brightness V=22.9

[RECON map]
Object is 44.0 AU from the Sun and 43.1 AU from the Earth.
Apparent velocity is 23.2 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 205 seconds.
The 1-sigma cross-track error in the shadow position is 3517 km.
The sky-plane scale is 31278.7 km/arcsec.

The object has an absolute magnitude Hv=6.4
Diameter=314.8 km assuming a 5% albedo -- 13.6 sec chord
Diameter=128.5 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 308634, (2029/03/27 08:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:55.7 +11:49:23  1.3 14.02   5
58 Leo         11:02:04.2 +03:27:36  4.8  1.88  17
PPM 157261     10:52:27.6 +03:26:07  7.4  0.58  15
PPM 157276     10:53:04.3 +03:14:02  9.3  0.38  15
PPM 157298     10:54:10.7 +03:27:21 10.2  0.27  15
308634         10:54:36.6 +03:12:47 16.0        16
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 4.4 sigma about the mid-time.
The median site spacing is 14.8 km RECON observability=1.0 and success probability=8.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:26:40 -32.7 Dark Up 29.9 231.1 Low 08:11:40 - 08:41:40 4414
Kamloops 08:27:11 -36.4 Dark Up 37.1 216.3 Up 08:12:11 - 08:42:11 4001
Kelowna 08:27:10 -37.1 Dark Up 37.4 217.7 Up 08:12:10 - 08:42:10 3984
Peachland 08:27:10 -37.3 Dark Up 37.6 217.4 Up 08:12:10 - 08:42:10 3970
Summerland 08:27:10 -37.4 Dark Up 37.7 217.6 Up 08:12:10 - 08:42:10 3965
Penticton 08:27:10 -37.5 Dark Up 37.7 217.7 Up 08:12:10 - 08:42:10 3964
Oliver 08:27:10 -37.8 Dark Up 38.0 217.9 Up 08:12:10 - 08:42:10 3946
Anarchist Mountain Observatory 08:27:10 -38.0 Dark Up 38.0 218.2 Up 08:12:10 - 08:42:10 3944
Okanogan 08:27:10 -38.6 Dark Up 38.6 218.3 Up 08:12:10 - 08:42:10 3903
Brewster 08:27:10 -38.9 Dark Up 38.9 218.2 Up 08:12:10 - 08:42:10 3883
Manson/Chelan 08:27:10 -39.1 Dark Up 39.2 217.8 Up 08:12:10 - 08:42:10 3860
Wenatchee 08:27:10 -39.6 Dark Up 39.7 217.9 Up 08:12:10 - 08:42:10 3829
Dunrhomin 08:25:57 -43.3 Dark Up 36.5 238.0 Up 08:10:57 - 08:40:57 3804
Ellensburg 08:27:10 -40.1 Dark Up 40.1 217.8 Up 08:12:10 - 08:42:10 3800
Victoria 08:27:10 -38.7 Dark Up 40.0 213.6 Up 08:12:10 - 08:42:10 3799
Nikitin 08:25:56 -43.4 Dark Up 36.6 238.1 Up 08:10:56 - 08:40:56 3792
CU-SBO 08:25:57 -43.5 Dark Up 36.7 238.1 Up 08:10:57 - 08:40:57 3786
Yakima 08:27:10 -40.5 Dark Up 40.4 218.0 Up 08:12:10 - 08:42:10 3778
PNWRO 08:26:50 -40.9 Dark Up 40.2 220.2 Up 08:11:50 - 08:41:50 3775
Toppenish/White Swan 08:26:56 -40.7 Dark Up 40.5 218.3 Up 08:11:56 - 08:41:56 3755
The Dalles 08:26:55 -41.5 Dark Up 41.5 217.7 Up 08:11:55 - 08:41:55 3685
Maupin 08:26:53 -41.9 Dark Up 41.8 218.1 Up 08:11:53 - 08:41:53 3663
Sisters 08:26:53 -42.8 Dark Up 42.7 218.0 Up 08:11:53 - 08:41:53 3593
Bend 08:26:51 -43.0 Dark Up 42.8 218.4 Up 08:11:51 - 08:41:51 3586
Oregon Observatory 08:26:51 -43.2 Dark Up 43.0 218.3 Up 08:11:51 - 08:41:51 3571
Chiloquin 08:26:48 -44.6 Dark Up 44.2 218.6 Up 08:11:48 - 08:41:48 3473
Cedarville 08:26:40 -45.5 Dark Up 44.2 221.3 Up 08:11:40 - 08:41:40 3455
Klamath Falls 08:26:47 -44.9 Dark Up 44.4 218.9 Up 08:11:47 - 08:41:47 3453
Fall River/Burney 08:26:42 -46.0 Dark Up 45.2 220.1 Up 08:11:42 - 08:41:42 3385
Gimple 08:26:39 -46.9 Dark Up 45.6 221.3 Up 08:11:39 - 08:41:39 3339
Greenville 08:26:39 -46.9 Dark Up 45.6 221.2 Up 08:11:39 - 08:41:39 3336
Reno 08:26:34 -47.4 Dark Up 45.5 223.0 Up 08:11:34 - 08:41:34 3331
Portola 08:26:37 -47.2 Dark Up 45.6 222.0 Up 08:11:37 - 08:41:37 3329
Quincy 08:26:38 -47.1 Dark Up 45.8 221.4 Up 08:11:38 - 08:41:38 3322
Yerington 08:26:31 -47.9 Dark Up 45.6 224.2 Up 08:11:31 - 08:41:31 3312
Carson City 08:26:33 -47.7 Dark Up 45.8 223.3 Up 08:11:33 - 08:41:33 3306
Hawthorne 08:26:29 -48.3 Dark Up 45.6 225.1 Up 08:11:29 - 08:41:29 3296
Gardnerville 08:26:33 -48.0 Dark Up 45.9 223.5 Up 08:11:33 - 08:41:33 3290
Lee Vining 08:26:27 -48.9 Dark Up 46.3 224.9 Up 08:11:27 - 08:41:27 3241
Beatty 08:26:18 -49.6 Dark Up 45.7 228.5 Up 08:11:18 - 08:41:18 3239
Patrick 08:26:06 -50.4 Dark Up 44.8 232.8 Up 08:11:06 - 08:41:06 3223
Bishop 08:26:23 -49.4 Dark Up 46.3 226.2 Up 08:11:23 - 08:41:23 3221
Laughlin/Bullhead City 08:26:06 -50.8 Dark Up 45.4 232.2 Up 08:11:06 - 08:41:06 3183
George/Scottsdale 08:25:54 -51.4 Dark Up 44.5 236.2 Up 08:10:54 - 08:40:54 3163
Lake Havasu City 08:26:04 -51.4 Dark Up 45.7 233.0 Up 08:11:04 - 08:41:04 3141
Idyllwild 08:26:08 -52.6 Dark Up 47.7 231.0 Up 08:11:08 - 08:41:08 3008
Calipatria 08:26:03 -53.0 Dark Up 47.3 232.8 Up 08:11:03 - 08:41:03 3000
Yuma 08:25:59 -53.2 Dark Up 47.0 234.2 Up 08:10:59 - 08:40:59 2996
Wildwood 08:26:16 -52.6 Dark Up 48.7 228.6 Up 08:11:16 - 08:41:16 2973

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 308634, (2029/03/27 08:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 14.02   5
58 Leo         11:00:33.7 +03:37:02  4.8  1.88  17
PPM 157261     10:50:57.0 +03:35:27  7.4  0.58  15
PPM 157276     10:51:33.8 +03:23:22  9.3  0.38  15
PPM 157298     10:52:40.1 +03:36:42 10.2  0.27  15
308634         10:53:06.1 +03:22:08 16.0        15
Positions are for J2000

Event circumstances last updated at 2023/03/27 23:26:10 UT

Marc W. Buie, Southwest Research Institute

RECON