RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star GA1060:08622853 with event index number of 1690225

Geocentric closest approach at 2027/05/15 06:29:21 UTC

J2000 position of star is 19:08:09.5 +17:57:31
Equinox of date position of star is 19:09:03.0 +17:59:29
Stellar brightness G=14.9, use SENSEUP=128
Star is 115 degrees from the moon. Moon is 73% illuminated.
TNO apparent brightness V=24.5

[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 198 seconds.
The 1-sigma cross-track error in the shadow position is 4985 km.
The sky-plane scale is 19413.1 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=239.9 km assuming a 5% albedo -- 2.9 sec chord
Diameter=97.9 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470309, (2027/05/15 06:29UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:51.8 +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 +16:53:48  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 4.6 sigma about the mid-time.
The median site spacing is 24.6 km RECON observability=1.0 and success probability=9.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 06:33:59 -18.7 Dark Up 23.2 89.4 Low 06:18:59 - 06:48:59 -2998
Peachland 06:34:00 -19.1 Dark Up 22.9 88.9 Low 06:19:00 - 06:49:00 -3054
Summerland 06:34:00 -19.3 Dark Up 22.9 88.9 Low 06:19:00 - 06:49:00 -3071
Penticton 06:33:59 -19.3 Dark Up 23.0 89.0 Low 06:18:59 - 06:48:59 -3078
Oliver 06:33:59 -19.7 Dark Up 23.0 88.8 Low 06:18:59 - 06:48:59 -3117
Anarchist Mountain Observatory 06:33:59 -19.9 Dark Up 23.1 88.9 Low 06:18:59 - 06:48:59 -3136
Tonasket 06:33:58 -20.1 Dark Up 23.1 88.7 Low 06:18:58 - 06:48:58 -3170
Victoria 06:34:04 -19.3 Dark Up 20.4 85.7 Low 06:19:04 - 06:49:04 -3189
Okanogan 06:33:59 -20.4 Dark Up 23.0 88.4 Low 06:18:59 - 06:48:59 -3207
Brewster 06:33:59 -20.6 Dark Up 22.8 88.2 Low 06:18:59 - 06:48:59 -3237
Manson/Chelan 06:33:59 -20.7 Dark Up 22.6 87.8 Low 06:18:59 - 06:48:59 -3261
Entiat 06:34:00 -20.9 Dark Up 22.5 87.7 Low 06:19:00 - 06:49:00 -3285
Wenatchee 06:34:00 -21.1 Dark Up 22.4 87.5 Low 06:19:00 - 06:49:00 -3313
Ellensburg 06:34:00 -21.5 Dark Up 22.3 87.2 Low 06:19:00 - 06:49:00 -3359
Yakima 06:33:58 -21.8 Dark Up 22.2 87.0 Low 06:18:58 - 06:48:58 -3403
Toppenish/White Swan 06:33:59 -22.1 Dark Up 22.3 87.0 Low 06:18:59 - 06:48:59 -3427
Pasco 06:33:57 -22.5 Dark Up 23.2 87.9 Low 06:18:57 - 06:48:57 -3438
PNWRO 06:33:56 -22.8 Dark Up 23.4 87.9 Low 06:18:56 - 06:48:56 -3465
Goldendale 06:33:58 -22.5 Dark Up 22.0 86.5 Low 06:18:58 - 06:48:58 -3488
The Dalles 06:33:58 -22.6 Dark Up 21.7 86.1 Low 06:18:58 - 06:48:58 -3512
Maupin 06:33:59 -23.0 Dark Up 21.8 86.1 Low 06:18:59 - 06:48:59 -3558
Sisters 06:33:58 -23.7 Dark Up 21.4 85.4 Low 06:18:58 - 06:48:58 -3654
Redmond 06:33:57 -23.8 Dark Up 21.7 85.6 Low 06:18:57 - 06:48:57 -3657
Bend 06:33:58 -24.0 Dark Up 21.5 85.4 Low 06:18:58 - 06:48:58 -3680
Oregon Observatory 06:33:57 -24.1 Dark Up 21.4 85.3 Low 06:18:57 - 06:48:57 -3699
La Pine/Gilchrist 06:33:58 -24.3 Dark Up 21.4 85.2 Low 06:18:58 - 06:48:58 -3721
North Lake 06:33:56 -24.9 Dark Up 21.8 85.4 Low 06:18:56 - 06:48:56 -3769
Paisley 06:33:55 -25.5 Dark Up 22.0 85.4 Low 06:18:55 - 06:48:55 -3828
Klamath Falls 06:33:56 -25.5 Dark Up 21.0 84.4 Low 06:18:56 - 06:48:56 -3879
Lakeview 06:33:54 -26.0 Dark Up 22.1 85.3 Low 06:18:54 - 06:48:54 -3883
Niwot 06:33:24 -30.8 Dark Up 33.4 94.2 Up 06:18:24 - 06:48:24 -3953
Cedarville 06:33:53 -26.6 Dark Up 22.2 85.2 Low 06:18:53 - 06:48:53 -3953
SwRI 06:33:26 -30.9 Dark Up 33.3 94.0 Up 06:18:26 - 06:48:26 -3965
Fall River/Burney 06:33:54 -26.7 Dark Up 21.2 84.2 Low 06:18:54 - 06:48:54 -4006
Susanville 06:33:52 -27.5 Dark Up 21.7 84.4 Low 06:18:52 - 06:48:52 -4073
Greenville 06:33:53 -27.7 Dark Up 21.4 84.1 Low 06:18:53 - 06:48:53 -4103
Gimple 06:33:53 -27.7 Dark Up 21.5 84.2 Low 06:18:53 - 06:48:53 -4103
Quincy 06:33:53 -27.9 Dark Up 21.4 84.1 Low 06:18:53 - 06:48:53 -4125
Portola 06:33:52 -28.1 Dark Up 21.8 84.3 Low 06:18:52 - 06:48:52 -4138
Reno 06:33:51 -28.6 Dark Up 22.2 84.6 Low 06:18:51 - 06:48:51 -4166
Carson City 06:33:49 -28.9 Dark Up 22.2 84.4 Low 06:18:49 - 06:48:49 -4204
Yerington 06:33:48 -29.3 Dark Up 22.7 84.7 Low 06:18:48 - 06:48:48 -4223
Gardnerville 06:33:49 -29.2 Dark Up 22.2 84.4 Low 06:18:49 - 06:48:49 -4230
Hawthorne 06:33:46 -29.9 Dark Up 23.0 84.9 Low 06:18:46 - 06:48:46 -4271
Tonopah 06:33:44 -30.7 Dark Up 24.1 85.5 Low 06:18:44 - 06:48:44 -4315
Lee Vining 06:33:46 -30.2 Dark Up 22.6 84.3 Low 06:18:46 - 06:48:46 -4333
Bishop 06:33:45 -31.0 Dark Up 23.1 84.5 Low 06:18:45 - 06:48:45 -4393
Beatty 06:33:41 -31.9 Dark Up 24.4 85.2 Low 06:18:41 - 06:48:41 -4434
Indian Springs 06:33:38 -32.5 Dark Up 25.2 85.7 Low 06:18:38 - 06:48:38 -4462
Henderson 06:33:38 -33.2 Dark Up 25.7 85.8 Low 06:18:38 - 06:48:38 -4512
Patrick 06:33:33 -34.0 Dark Up 26.6 86.1 Low 06:18:33 - 06:48:33 -4568
Searchlight/Boulder City 06:33:35 -33.7 Dark Up 25.7 85.6 Low 06:18:35 - 06:48:35 -4571
DCO 06:33:33 -34.5 Dark Up 27.1 86.4 Low 06:18:33 - 06:48:33 -4593
Kingman/Dolan Springs 06:33:35 -34.2 Dark Up 26.4 85.9 Low 06:18:35 - 06:48:35 -4593
Laughlin/Bullhead City 06:33:36 -34.1 Dark Up 26.0 85.6 Low 06:18:36 - 06:48:36 -4599
CPSLO 06:33:45 -32.2 Dark Up 21.1 82.4 Low 06:18:45 - 06:48:45 -4613
Mohave Valley 06:33:34 -34.4 Dark Up 25.9 85.5 Low 06:18:34 - 06:48:34 -4627
Lake Havasu City 06:33:32 -34.8 Dark Up 26.1 85.4 Low 06:18:32 - 06:48:32 -4667
Parker 06:33:31 -35.1 Dark Up 26.1 85.3 Low 06:18:31 - 06:48:31 -4703
George/Scottsdale 06:33:27 -36.1 Dark Up 28.1 86.3 Low 06:18:27 - 06:48:27 -4721
Wildwood 06:33:39 -34.0 Dark Up 22.6 83.0 Low 06:18:39 - 06:48:39 -4734
Blythe 06:33:31 -35.6 Dark Up 25.8 84.9 Low 06:18:31 - 06:48:31 -4759
Idyllwild 06:33:35 -34.9 Dark Up 24.1 83.8 Low 06:18:35 - 06:48:35 -4763
Calipatria 06:33:32 -35.8 Dark Up 25.0 84.1 Low 06:18:32 - 06:48:32 -4817
Yuma 06:33:30 -36.4 Dark Up 25.7 84.4 Low 06:18:30 - 06:48:30 -4854

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 06:29UT)
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 +16:51:06  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 2020/02/04 20:50:21 UT

Marc W. Buie, Southwest Research Institute

RECON