RECON: TNO occultation with 517717

Event between (517717) 15KZ120 and star GA1700:00957947 with event index number of 1172111

Geocentric closest approach at 2021/06/26 09:36:49 UTC

J2000 position of star is 23:30:48.7 +80:24:28
Equinox of date position of star is 23:31:32.7 +80:31:30
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 108 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=20.4

[RECON map]
TNO is 9.5 AU from the Sun and 9.8 AU from the Earth.
The TNO is moving 26.6 km/sec on the sky relative to the star, or, 13.5 arcsec/hr.
The 1-sigma error in the time of the event is 21 seconds.
The 1-sigma cross-track error in the shadow position is 782 km.
The sky-plane scale is 7112.2 km/arcsec.

The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 2.2 sec chord
Diameter=23.5 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 517717, (2021/06/26 09:37UT)
Object            RA         Dec     mag  sep  mel
PPM 000431     02:59:13.1 +89:21:14  2.0  9.09 115
PPM 004304     00:10:34.0 +79:50:02  6.3  1.80 109
PPM 011634     23:28:02.2 +79:54:48  7.8  0.63 108
PPM 004170     23:36:39.2 +80:33:55  9.6  0.21 109
517717         23:31:33.4 +80:31:36 16.3       109
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 7.8 km RECON observability=0.9 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
CPSLO 09:34:51 -27.7 Dark Up 40.4 10.3 Up 09:32:36 - 09:37:06 4640
Wildwood 09:34:43 -28.1 Dark Up 39.5 9.9 Up 09:32:28 - 09:36:58 4548
Quincy 09:35:02 -23.5 Dark Up 44.9 11.1 Up 09:32:47 - 09:37:17 4456
Greenville 09:35:03 -23.3 Dark Up 45.1 11.2 Up 09:32:48 - 09:37:18 4447
Gimple 09:35:02 -23.2 Dark Up 45.1 11.2 Up 09:32:47 - 09:37:17 4442
Portola 09:35:01 -23.4 Dark Up 44.9 11.1 Up 09:32:46 - 09:37:16 4433
Fall River/Burney 09:35:06 -22.5 Dark Up 45.9 11.4 Up 09:32:51 - 09:37:21 4432
Idyllwild 09:34:38 -27.7 Dark Up 39.4 9.7 Up 09:32:23 - 09:36:53 4429
Lee Vining 09:34:53 -24.7 Dark Up 43.2 10.6 Up 09:32:38 - 09:37:08 4428
Gardnerville 09:34:57 -24.0 Dark Up 44.1 10.8 Up 09:32:42 - 09:37:12 4426
Carson City 09:34:58 -23.8 Dark Up 44.3 10.9 Up 09:32:43 - 09:37:13 4418
Susanville 09:35:02 -22.9 Dark Up 45.4 11.2 Up 09:32:47 - 09:37:17 4416
Bishop 09:34:50 -25.0 Dark Up 42.7 10.4 Up 09:32:35 - 09:37:05 4405
Reno 09:34:59 -23.5 Dark Up 44.7 10.9 Up 09:32:44 - 09:37:14 4404
Klamath Falls 09:35:09 -21.5 Dark Up 47.0 11.7 Up 09:32:54 - 09:37:24 4398
Yerington 09:34:56 -23.8 Dark Up 44.2 10.8 Up 09:32:41 - 09:37:11 4386
Chiloquin 09:35:10 -21.2 Dark Up 47.4 11.8 Up 09:32:55 - 09:37:25 4386
Hawthorne 09:34:54 -24.0 Dark Up 43.9 10.6 Up 09:32:39 - 09:37:09 4372
Calipatria 09:34:34 -27.8 Dark Up 39.0 9.4 Up 09:32:19 - 09:36:49 4364
Cedarville 09:35:04 -21.8 Dark Up 46.6 11.4 Up 09:32:49 - 09:37:19 4335
Lakeview 09:35:06 -21.2 Dark Up 47.2 11.5 Up 09:32:51 - 09:37:21 4314
Beatty 09:34:46 -24.9 Dark Up 42.5 10.1 Up 09:32:31 - 09:37:01 4313
Yuma 09:34:32 -27.8 Dark Up 38.7 9.3 Up 09:32:17 - 09:36:47 4312
La Pine/Gilchrist 09:35:12 -20.1 Dark Up 48.5 12.0 Up 09:32:57 - 09:37:27 4309
Paisley 09:35:08 -20.8 Dark Up 47.7 11.7 Up 09:32:53 - 09:37:23 4301
Tonopah 09:34:50 -24.0 Dark Up 43.6 10.4 Up 09:32:35 - 09:37:05 4298
North Lake 09:35:10 -20.4 Dark Up 48.2 11.8 Up 09:32:55 - 09:37:25 4295
Oregon Observatory 09:35:13 -19.9 Dark Up 48.7 12.0 Up 09:32:58 - 09:37:28 4295
Sisters 09:35:14 -19.6 Dark Up 49.1 12.1 Up 09:32:59 - 09:37:29 4281
Bend 09:35:13 -19.7 Dark Up 48.9 12.1 Up 09:32:58 - 09:37:28 4279
Blythe 09:34:34 -27.0 Dark Up 39.6 9.4 Up 09:32:19 - 09:36:49 4278
Redmond 09:35:13 -19.5 Dark Up 49.1 12.1 Up 09:32:58 - 09:37:28 4259
Indian Springs 09:34:43 -24.8 Dark Up 42.3 9.9 Up 09:32:28 - 09:36:58 4250
Parker 09:34:34 -26.4 Dark Up 40.1 9.4 Up 09:32:19 - 09:36:49 4238
Mohave Valley 09:34:37 -25.8 Dark Up 40.8 9.6 Up 09:32:22 - 09:36:52 4232
Lake Havasu City 09:34:35 -26.1 Dark Up 40.5 9.5 Up 09:32:20 - 09:36:50 4228
Laughlin/Bullhead City 09:34:37 -25.6 Dark Up 41.1 9.6 Up 09:32:22 - 09:36:52 4223
Henderson 09:34:40 -25.0 Dark Up 41.9 9.8 Up 09:32:25 - 09:36:55 4221
Maupin 09:35:15 -18.6 Dark Up 50.0 12.3 Up 09:33:00 - 09:37:30 4207
The Dalles 09:35:16 -18.2 Dark Up 50.4 12.4 Up 09:33:01 - 09:37:31 4192
Kingman/Dolan Springs 09:34:37 -25.4 Dark Up 41.2 9.5 Up 09:32:22 - 09:36:52 4185
Patrick 09:34:37 -25.1 Dark Up 41.4 9.5 Up 09:32:22 - 09:36:52 4163
Goldendale 09:35:16 -17.9 AT Up 50.7 12.4 Up 09:33:01 - 09:37:31 4159
Victoria 09:35:28 -16.0 AT Up 52.9 13.5 Up 09:33:13 - 09:37:43 4152
Toppenish/White Swan 09:35:17 -17.3 AT Up 51.3 12.5 Up 09:33:02 - 09:37:32 4106
Yakima 09:35:18 -17.2 AT Up 51.5 12.6 Up 09:33:03 - 09:37:33 4105
Ellensburg 09:35:19 -16.8 AT Up 51.9 12.7 Up 09:33:04 - 09:37:34 4082
George/Scottsdale 09:34:29 -25.7 Dark Up 40.0 9.0 Up 09:32:14 - 09:36:44 4070
Wenatchee 09:35:20 -16.3 AT Up 52.3 12.8 Up 09:33:05 - 09:37:35 4048
Pasco 09:35:14 -17.1 AT Up 51.4 12.4 Up 09:32:59 - 09:37:29 4040
PNWRO 09:35:13 -17.3 AT Up 51.2 12.3 Up 09:32:58 - 09:37:28 4040
Manson/Chelan 09:35:20 -15.8 AT Up 52.8 12.9 Up 09:33:05 - 09:37:35 4014
Brewster 09:35:21 -15.6 AT Up 53.1 13.0 Up 09:33:06 - 09:37:36 3982
Okanogan 09:35:21 -15.3 AT Up 53.4 13.0 Up 09:33:06 - 09:37:36 3957
Tonasket 09:35:22 -14.9 AT Up 53.7 13.1 Up 09:33:07 - 09:37:37 3930
Oliver 09:35:23 -14.5 AT Up 54.2 13.3 Up 09:33:08 - 09:37:38 3912
Anarchist Mountain Observatory 09:35:22 -14.6 AT Up 54.0 13.2 Up 09:33:07 - 09:37:37 3911
Summerland 09:35:24 -14.1 AT Up 54.6 13.4 Up 09:33:09 - 09:37:39 3895
Penticton 09:35:24 -14.2 AT Up 54.5 13.4 Up 09:33:09 - 09:37:39 3892
Peachland 09:35:25 -14.0 AT Up 54.7 13.5 Up 09:33:10 - 09:37:40 3892
Kelowna 09:35:25 -13.8 AT Up 54.8 13.5 Up 09:33:10 - 09:37:40 3870
Clarence Fulton 09:35:26 -13.4 AT Up 55.2 13.6 Up 09:33:11 - 09:37:41 3840
Dunrhomin 09:34:35 -17.3 AT Up 47.3 9.0 Up 09:32:20 - 09:36:50 3356

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 517717, (2021/06/26 09:37UT)
Object            RA         Dec     mag  sep  mel
PPM 000431     02:31:52.9 +89:15:50  2.0  9.09 115
PPM 004304     00:09:21.0 +79:42:52  6.3  1.80 109
PPM 011634     23:27:18.7 +79:47:42  7.8  0.63 108
PPM 004170     23:35:50.9 +80:26:46  9.6  0.21 109
517717         23:30:48.7 +80:24:28 16.3       108
Positions are for J2000

Event circumstances last updated at 2021/03/11 01:31:35 UT

Marc W. Buie, Southwest Research Institute

RECON