RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star GA1060:08622853 with event index number of 2229872

Geocentric closest approach at 2027/05/15 06:29:50 UTC

J2000 position of star is 19:08:09.5 +17:57:31
Equinox of date position of star is 19:09:08.9 +17:59:43
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 73% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 27.2 AU from the Sun and 26.8 AU from the Earth.
The TNO is moving 20.9 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 74 seconds.
The 1-sigma cross-track error in the shadow position is 1751 km.
The sky-plane scale is 19413.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=209.9 km assuming a 5% albedo -- 10.1 sec chord
Diameter=85.7 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470309, (2027/05/15 06:30UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:51.9 +38:48:36  0.0 21.91 104
Tarazed        19:47:33.6 +10:40:54  2.7 11.79 125
PPM 135832     19:09:11.0 +16:53:47  6.4  1.11 115
PPM 135820     19:08:45.6 +18:36:26  7.4  0.62 115
PPM 135831     19:09:09.5 +17:47:00  8.8  0.23 115
470309         19:09:22.3 +18:00:13 14.9       115
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 29.5 km RECON observability=1.0 and success probability=12.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:34:09 -18.9 Dark Up 31.4 101.3 Up 06:27:29 - 06:40:49 -2474
Kamloops 06:34:29 -18.1 Dark Up 22.6 88.9 Low 06:27:49 - 06:41:09 -2745
Kelowna 06:34:29 -19.1 Dark Up 23.2 89.3 Low 06:27:49 - 06:41:09 -2834
Peachland 06:34:29 -19.1 Dark Up 23.0 89.0 Low 06:27:49 - 06:41:09 -2847
Summerland 06:34:29 -19.3 Dark Up 23.0 89.0 Low 06:27:49 - 06:41:09 -2863
Penticton 06:34:29 -19.4 Dark Up 23.1 89.0 Low 06:27:49 - 06:41:09 -2870
Oliver 06:34:28 -19.7 Dark Up 23.1 88.9 Low 06:27:48 - 06:41:08 -2909
Anarchist Mountain Observatory 06:34:29 -19.9 Dark Up 23.2 89.0 Low 06:27:49 - 06:41:09 -2928
Tonasket 06:34:28 -20.2 Dark Up 23.2 88.8 Low 06:27:48 - 06:41:08 -2962
Victoria 06:34:33 -19.4 Dark Up 20.5 85.8 Low 06:27:53 - 06:41:13 -2981
Okanogan 06:34:28 -20.5 Dark Up 23.0 88.5 Low 06:27:48 - 06:41:08 -2999
Brewster 06:34:28 -20.7 Dark Up 22.9 88.3 Low 06:27:48 - 06:41:08 -3029
Manson/Chelan 06:34:28 -20.8 Dark Up 22.6 87.9 Low 06:27:48 - 06:41:08 -3053
Wenatchee 06:34:28 -21.2 Dark Up 22.5 87.6 Low 06:27:48 - 06:41:08 -3105
Ellensburg 06:34:28 -21.5 Dark Up 22.3 87.3 Low 06:27:48 - 06:41:08 -3151
Yakima 06:34:28 -21.9 Dark Up 22.3 87.1 Low 06:27:48 - 06:41:08 -3196
Toppenish/White Swan 06:34:27 -22.1 Dark Up 22.4 87.1 Low 06:27:47 - 06:41:07 -3219
PNWRO 06:34:25 -22.8 Dark Up 23.4 88.0 Low 06:27:45 - 06:41:05 -3257
Goldendale 06:34:27 -22.5 Dark Up 22.1 86.6 Low 06:27:47 - 06:41:07 -3280
The Dalles 06:34:29 -22.6 Dark Up 21.8 86.2 Low 06:27:49 - 06:41:09 -3305
Maupin 06:34:27 -23.1 Dark Up 21.9 86.1 Low 06:27:47 - 06:41:07 -3351
Sisters 06:34:27 -23.7 Dark Up 21.5 85.4 Low 06:27:47 - 06:41:07 -3447
Bend 06:34:27 -24.0 Dark Up 21.6 85.5 Low 06:27:47 - 06:41:07 -3473
Oregon Observatory 06:34:27 -24.1 Dark Up 21.5 85.4 Low 06:27:47 - 06:41:07 -3492
North Lake 06:34:25 -24.9 Dark Up 21.9 85.5 Low 06:27:45 - 06:41:05 -3561
Chiloquin 06:34:25 -25.2 Dark Up 21.1 84.6 Low 06:27:45 - 06:41:05 -3634
Klamath Falls 06:34:25 -25.6 Dark Up 21.1 84.5 Low 06:27:45 - 06:41:05 -3671
Lakeview 06:34:22 -26.0 Dark Up 22.2 85.4 Low 06:27:42 - 06:41:02 -3676
Dunrhomin 06:33:55 -30.7 Dark Up 33.5 94.3 Up 06:27:15 - 06:40:35 -3728
Cedarville 06:34:22 -26.7 Dark Up 22.2 85.2 Low 06:27:42 - 06:41:02 -3746
CU-SBO 06:33:54 -30.9 Dark Up 33.4 94.1 Up 06:27:14 - 06:40:34 -3756
Fall River/Burney 06:34:24 -26.8 Dark Up 21.3 84.3 Low 06:27:44 - 06:41:04 -3799
Susanville 06:34:21 -27.6 Dark Up 21.8 84.5 Low 06:27:41 - 06:41:01 -3866
Greenville 06:34:22 -27.7 Dark Up 21.5 84.2 Low 06:27:42 - 06:41:02 -3896
Gimple 06:34:21 -27.8 Dark Up 21.6 84.3 Low 06:27:41 - 06:41:01 -3896
Quincy 06:34:21 -27.9 Dark Up 21.5 84.1 Low 06:27:41 - 06:41:01 -3917
Portola 06:34:20 -28.2 Dark Up 21.9 84.4 Low 06:27:40 - 06:41:00 -3931
Reno 06:34:20 -28.6 Dark Up 22.3 84.7 Low 06:27:40 - 06:41:00 -3958
Carson City 06:34:19 -29.0 Dark Up 22.3 84.5 Low 06:27:39 - 06:40:59 -3996
Yerington 06:34:18 -29.3 Dark Up 22.8 84.8 Low 06:27:38 - 06:40:58 -4015
Gardnerville 06:34:17 -29.2 Dark Up 22.3 84.4 Low 06:27:37 - 06:40:57 -4022
Hawthorne 06:34:16 -29.9 Dark Up 23.1 84.9 Low 06:27:36 - 06:40:56 -4063
Tonopah 06:34:13 -30.7 Dark Up 24.2 85.6 Low 06:27:33 - 06:40:53 -4107
Lee Vining 06:34:15 -30.3 Dark Up 22.7 84.4 Low 06:27:35 - 06:40:55 -4125
Bishop 06:34:13 -31.0 Dark Up 23.2 84.6 Low 06:27:33 - 06:40:53 -4185
Beatty 06:34:10 -31.9 Dark Up 24.5 85.3 Low 06:27:30 - 06:40:50 -4226
Indian Springs 06:34:08 -32.5 Dark Up 25.3 85.8 Low 06:27:28 - 06:40:48 -4253
Henderson 06:34:05 -33.2 Dark Up 25.8 85.9 Low 06:27:25 - 06:40:45 -4304
Patrick 06:34:02 -34.1 Dark Up 26.7 86.2 Low 06:27:22 - 06:40:42 -4359
Kingman/Dolan Springs 06:34:02 -34.2 Dark Up 26.5 86.0 Low 06:27:22 - 06:40:42 -4384
Laughlin/Bullhead City 06:34:04 -34.1 Dark Up 26.1 85.7 Low 06:27:24 - 06:40:44 -4391
Mohave Valley 06:34:02 -34.4 Dark Up 26.0 85.6 Low 06:27:22 - 06:40:42 -4419
Lake Havasu City 06:34:02 -34.8 Dark Up 26.2 85.5 Low 06:27:22 - 06:40:42 -4458
Parker 06:34:02 -35.2 Dark Up 26.2 85.3 Low 06:27:22 - 06:40:42 -4494
George/Scottsdale 06:33:56 -36.1 Dark Up 28.2 86.4 Low 06:27:16 - 06:40:36 -4512
Wildwood 06:34:08 -34.0 Dark Up 22.7 83.1 Low 06:27:28 - 06:40:48 -4526
Idyllwild 06:34:03 -34.9 Dark Up 24.2 83.9 Low 06:27:23 - 06:40:43 -4555
Calipatria 06:34:00 -35.8 Dark Up 25.1 84.2 Low 06:27:20 - 06:40:40 -4608
Yuma 06:33:58 -36.5 Dark Up 25.8 84.4 Low 06:27:18 - 06:40:38 -4645

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 470309, (2027/05/15 06:30UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 21.91 104
Tarazed        19:46:15.6 +10:36:48  2.7 11.79 125
PPM 135832     19:07:57.4 +16:51:05  6.4  1.11 115
PPM 135820     19:07:33.2 +18:33:46  7.4  0.62 115
PPM 135831     19:07:56.5 +17:44:19  8.8  0.23 115
470309         19:08:09.5 +17:57:31 14.9       115
Positions are for J2000

Event circumstances last updated at 2022/05/07 22:16:22 UT

Marc W. Buie, Southwest Research Institute

RECON