RECON: TNO occultation with 469506

Event between (469506) 03FF128 and star GA0660:17375556 with event index number of 1704900

Geocentric closest approach at 2027/06/13 06:06:51 UTC

J2000 position of star is 17:41:52.6 -23:09:59
Equinox of date position of star is 17:43:20.7 -23:10:36
Stellar brightness G=14.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 71 degrees from the moon. Moon is 69% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 31.0 AU from the Sun and 30.0 AU from the Earth.
Apparent velocity is 23.3 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 294 seconds.
The 1-sigma cross-track error in the shadow position is 1275 km.
The sky-plane scale is 21765.9 km/arcsec.

The object has an absolute magnitude Hv=6.9
Diameter=254.7 km assuming a 5% albedo -- 10.9 sec chord
Diameter=104.0 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469506, (2027/06/13 06:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.7 -26:29:26  0.9 16.75  55
35Eta Oph      17:11:57.3 -15:45:25  2.6 10.51  64
PPM 267109     17:40:23.9 -21:55:35  6.4  1.45  71
PPM 267163     17:44:00.3 -23:21:37  7.7  0.21  71
PPM 267154     17:43:27.2 -22:59:15  9.4  0.19  71
469506         17:43:32.7 -23:10:41 14.4        72
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 3.1 sigma about the mid-time.
The median site spacing is 12.9 km RECON observability=0.4 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 06:07:49 -13.7 AT Up 13.1 162.9 Really Low 05:52:49 - 06:22:49 4178
Kamloops 06:08:30 -12.0 AT Up 10.8 149.9 Really Low 05:53:30 - 06:23:30 3942
Kelowna 06:08:29 -13.0 AT Up 11.8 150.6 Really Low 05:53:29 - 06:23:29 3926
Peachland 06:08:30 -13.0 AT Up 11.8 150.4 Really Low 05:53:30 - 06:23:30 3917
Summerland 06:08:30 -13.2 AT Up 12.0 150.4 Really Low 05:53:30 - 06:23:30 3913
Penticton 06:08:30 -13.3 AT Up 12.1 150.5 Really Low 05:53:30 - 06:23:30 3912
Oliver 06:08:31 -13.6 AT Up 12.4 150.5 Really Low 05:53:31 - 06:23:31 3898
Anarchist Mountain Observatory 06:08:30 -13.8 AT Up 12.6 150.6 Really Low 05:53:30 - 06:23:30 3895
Okanogan 06:08:32 -14.3 AT Up 13.1 150.4 Really Low 05:53:32 - 06:23:32 3865
Brewster 06:08:33 -14.5 AT Up 13.2 150.2 Really Low 05:53:33 - 06:23:33 3850
Manson/Chelan 06:08:34 -14.6 AT Up 13.3 149.8 Really Low 05:53:34 - 06:23:34 3836
Wenatchee 06:08:36 -15.0 AT Up 13.7 149.6 Really Low 05:53:36 - 06:23:36 3812
Victoria 06:08:42 -13.0 AT Up 11.6 147.1 Really Low 05:53:42 - 06:23:42 3805
Ellensburg 06:08:37 -15.3 AT Up 13.9 149.4 Really Low 05:53:37 - 06:23:37 3791
PNWRO 06:08:35 -16.7 AT Up 15.4 150.7 Really Low 05:53:35 - 06:23:35 3776
Yakima 06:08:38 -15.6 AT Up 14.3 149.3 Really Low 05:53:38 - 06:23:38 3773
Toppenish/White Swan 06:08:38 -15.9 AT Up 14.5 149.4 Really Low 05:53:38 - 06:23:38 3766
The Dalles 06:08:41 -16.3 AT Up 14.9 148.6 Really Low 05:53:41 - 06:23:41 3716
Dunrhomin 06:07:59 -25.4 Dark Up 24.6 162.5 Low 05:52:59 - 06:22:59 3700
Maupin 06:08:42 -16.7 AT Up 15.3 148.7 Really Low 05:53:42 - 06:23:42 3699
Nikitin 06:08:00 -25.5 Dark Up 24.7 162.5 Low 05:53:00 - 06:23:00 3690
CU-SBO 06:08:00 -25.6 Dark Up 24.8 162.4 Low 05:53:00 - 06:23:00 3686
Sisters 06:08:45 -17.3 AT Up 15.9 148.1 Really Low 05:53:45 - 06:23:45 3648
Bend 06:08:44 -17.6 AT Up 16.2 148.3 Really Low 05:53:44 - 06:23:44 3642
Oregon Observatory 06:08:45 -17.8 AT Up 16.3 148.2 Really Low 05:53:45 - 06:23:45 3631
Chiloquin 06:08:49 -18.8 Dark Up 17.3 147.6 Really Low 05:53:49 - 06:23:49 3557
Klamath Falls 06:08:49 -19.1 Dark Up 17.6 147.6 Really Low 05:53:49 - 06:23:49 3541
Cedarville 06:08:46 -20.3 Dark Up 18.8 148.9 Really Low 05:53:46 - 06:23:46 3535
Fall River/Burney 06:08:50 -20.3 Dark Up 18.7 147.8 Really Low 05:53:50 - 06:23:50 3485
Gimple 06:08:50 -21.3 Dark Up 19.7 148.1 Really Low 05:53:50 - 06:23:50 3446
Greenville 06:08:50 -21.2 Dark Up 19.7 148.0 Really Low 05:53:50 - 06:23:50 3445
Portola 06:08:50 -21.7 Dark Up 20.1 148.4 Low 05:53:50 - 06:23:50 3436
Reno 06:08:48 -22.2 Dark Up 20.6 148.9 Low 05:53:48 - 06:23:48 3434
Quincy 06:08:51 -21.4 Dark Up 19.8 148.0 Really Low 05:53:51 - 06:23:51 3434
Yerington 06:08:47 -22.9 Dark Up 21.4 149.3 Low 05:53:47 - 06:23:47 3416
Carson City 06:08:48 -22.5 Dark Up 20.9 148.8 Low 05:53:48 - 06:23:48 3415
Gardnerville 06:08:48 -22.7 Dark Up 21.2 148.8 Low 05:53:48 - 06:23:48 3402
Hawthorne 06:08:46 -23.5 Dark Up 22.0 149.7 Low 05:53:46 - 06:23:46 3399
Lee Vining 06:08:48 -23.8 Dark Up 22.3 149.2 Low 05:53:48 - 06:23:48 3358
Beatty 06:08:42 -25.6 Dark Up 24.1 151.1 Low 05:53:42 - 06:23:42 3340
Bishop 06:08:47 -24.6 Dark Up 23.1 149.7 Low 05:53:47 - 06:23:47 3336
Patrick 06:08:34 -27.9 Dark Up 26.5 153.4 Low 05:53:34 - 06:23:34 3302
Laughlin/Bullhead City 06:08:37 -27.9 Dark Up 26.5 152.7 Low 05:53:37 - 06:23:37 3274
Lake Havasu City 06:08:37 -28.6 Dark Up 27.2 152.8 Low 05:53:37 - 06:23:37 3237
George/Scottsdale 06:08:29 -30.1 Dark Up 28.8 154.9 Low 05:53:29 - 06:23:29 3230
Idyllwild 06:08:46 -28.5 Dark Up 26.9 150.4 Low 05:53:46 - 06:23:46 3146
Wildwood 06:08:52 -27.5 Dark Up 25.8 148.8 Low 05:53:52 - 06:23:52 3131
Calipatria 06:08:43 -29.4 Dark Up 27.9 151.3 Low 05:53:43 - 06:23:43 3127
Yuma 06:08:40 -30.1 Dark Up 28.6 152.0 Low 05:53:40 - 06:23:40 3116

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 469506, (2027/06/13 06:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.75  55
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.51  64
PPM 267109     17:38:44.8 -21:54:46  6.4  1.45  71
PPM 267163     17:42:20.1 -23:20:56  7.7  0.21  71
PPM 267154     17:41:47.3 -22:58:33  9.4  0.19  71
469506         17:41:52.6 -23:09:59 14.4        71
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:27:07 UT

Marc W. Buie, Southwest Research Institute

RECON