RECON: TNO occultation with 517717

Event between (517717) 15KZ120 and star GA1420:05063590 with event index number of 267376

Geocentric closest approach at 2019/05/18 10:19:01 UTC

J2000 position of star is 18:07:33.9 +52:14:18
Equinox of date position of star is 18:08:00.1 +52:14:31
Stellar brightness G=14.5, use SENSEUP=128
Star is 75 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=19.6

[RECON map]
TNO is 8.4 AU from the Sun and 8.1 AU from the Earth.
The TNO is moving 34.8 km/sec on the sky relative to the star, or, 21.3 arcsec/hr.
The 1-sigma error in the time of the event is 14 seconds.
The 1-sigma cross-track error in the shadow position is 411 km.
The sky-plane scale is 5890.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 1.8 sec chord
Diameter=25.8 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 517717, (2019/05/18 10:19UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:35.7 +38:48:10  0.0 14.39  70
Etamin         17:57:03.4 +51:29:14  2.2  1.85  74
PPM 036381     18:07:21.3 +50:49:36  6.3  1.42  74
PPM 036414     18:10:40.4 +51:54:13  8.3  0.53  75
PPM 036393     18:08:12.0 +52:01:54  8.7  0.21  75
517717         18:08:00.1 +52:14:31 14.5        75
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 6.8 km RECON observability=0.8 and success probability=31.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 10:18:13 -14.2 AT Up 74.8 327.4 Up 10:16:31 - 10:19:55 1678
SwRI 10:18:13 -14.3 AT Up 74.8 327.8 Up 10:16:31 - 10:19:55 1665
Kelowna 10:18:55 -13.5 AT Up 87.6 10.8 Up 10:17:13 - 10:20:37 1224
Penticton 10:18:54 -13.9 AT Up 87.2 11.6 Up 10:17:12 - 10:20:36 1191
Summerland 10:18:55 -13.9 AT Up 87.3 13.3 Up 10:17:13 - 10:20:37 1188
Okanagan Falls 10:18:54 -14.1 AT Up 87.0 11.1 Up 10:17:12 - 10:20:36 1178
Anarchist Mountain Observatory 10:18:53 -14.3 AT Up 86.7 7.7 Up 10:17:11 - 10:20:35 1170
Oliver 10:18:53 -14.2 AT Up 86.9 10.3 Up 10:17:11 - 10:20:35 1169
Oroville 10:18:52 -14.3 AT Up 86.7 8.4 Up 10:17:10 - 10:20:34 1160
Tonasket 10:18:52 -14.5 AT Up 86.4 7.8 Up 10:17:10 - 10:20:34 1146
Okanogan 10:18:51 -14.9 AT Up 86.1 8.5 Up 10:17:09 - 10:20:33 1116
Brewster 10:18:51 -15.2 AT Up 85.8 9.6 Up 10:17:09 - 10:20:33 1087
Manson/Chelan 10:18:51 -15.5 AT Up 85.5 12.0 Up 10:17:09 - 10:20:33 1051
Entiat 10:18:50 -15.7 AT Up 85.3 12.0 Up 10:17:08 - 10:20:32 1033
Pasco 10:18:45 -16.4 AT Up 84.0 3.0 Up 10:17:03 - 10:20:27 1014
PNWRO 10:18:44 -16.5 AT Up 83.8 1.6 Up 10:17:02 - 10:20:26 1013
Wenatchee 10:18:50 -15.9 AT Up 85.1 12.1 Up 10:17:08 - 10:20:32 1010
George/Umatilla 10:18:45 -16.8 AT Up 83.7 4.1 Up 10:17:03 - 10:20:27 979
Ellensburg 10:18:49 -16.4 AT Up 84.6 12.6 Up 10:17:07 - 10:20:31 971
Yakima 10:18:48 -16.7 AT Up 84.2 11.9 Up 10:17:06 - 10:20:30 944
Toppenish/White Swan 10:18:47 -16.8 AT Up 84.0 10.5 Up 10:17:05 - 10:20:29 941
Goldendale 10:18:46 -17.4 AT Up 83.4 11.9 Up 10:17:04 - 10:20:28 879
The Dalles 10:18:46 -17.8 AT Up 83.1 13.3 Up 10:17:04 - 10:20:28 841
Maupin 10:18:45 -18.1 Dark Up 82.8 12.1 Up 10:17:03 - 10:20:27 821
DCO 10:18:08 -22.2 Dark Up 72.5 349.2 Up 10:16:26 - 10:19:50 800
Madras/Culver 10:18:43 -18.6 Dark Up 82.2 11.4 Up 10:17:01 - 10:20:25 784
Patrick 10:18:10 -22.4 Dark Up 72.9 350.4 Up 10:16:28 - 10:19:52 760
Redmond 10:18:43 -18.9 Dark Up 81.9 11.2 Up 10:17:01 - 10:20:25 758
Bend 10:18:42 -19.1 Dark Up 81.6 11.5 Up 10:17:00 - 10:20:24 735
Kingman/Dolan Springs 10:18:10 -22.7 Dark Up 72.7 350.9 Up 10:16:28 - 10:19:52 733
Sisters 10:18:43 -19.0 Dark Up 81.8 12.9 Up 10:17:01 - 10:20:25 733
Oregon Observatory 10:18:42 -19.3 Dark Up 81.4 11.8 Up 10:17:00 - 10:20:24 715
North Lake 10:18:40 -19.6 Dark Up 80.9 9.0 Up 10:16:58 - 10:20:22 710
Henderson 10:18:13 -22.5 Dark Up 73.6 352.4 Up 10:16:31 - 10:19:55 708
Paisley 10:18:38 -19.9 Dark Up 80.4 7.2 Up 10:16:56 - 10:20:20 699
La Pine/Gilchrist 10:18:41 -19.5 Dark Up 81.2 11.7 Up 10:16:59 - 10:20:23 698
Laughlin/Bullhead City 10:18:10 -23.0 Dark Up 72.7 352.0 Up 10:16:28 - 10:19:52 691
Indian Springs 10:18:15 -22.5 Dark Up 74.2 353.7 Up 10:16:33 - 10:19:57 684
Lakeview 10:18:36 -20.3 Dark Up 79.9 6.2 Up 10:16:54 - 10:20:18 681
Searchlight/Boulder City 10:18:11 -22.9 Dark Up 73.0 352.5 Up 10:16:29 - 10:19:53 681
Mohave Valley 10:18:09 -23.2 Dark Up 72.4 352.1 Up 10:16:27 - 10:19:51 677
Lake Havasu City 10:18:08 -23.3 Dark Up 72.0 351.8 Up 10:16:26 - 10:19:50 674
Parker 10:18:07 -23.6 Dark Up 71.7 351.9 Up 10:16:25 - 10:19:49 657
Tonopah 10:18:21 -22.1 Dark Up 75.8 356.8 Up 10:16:39 - 10:20:03 654
Cedarville 10:18:34 -20.7 Dark Up 79.2 5.3 Up 10:16:52 - 10:20:16 652
Beatty 10:18:18 -22.8 Dark Up 74.6 356.0 Up 10:16:36 - 10:20:00 621
Blythe 10:18:06 -24.1 Dark Up 71.2 352.7 Up 10:16:24 - 10:19:48 605
Chiloquin 10:18:39 -20.6 Dark Up 80.1 11.7 Up 10:16:57 - 10:20:21 603
Tulelake 10:18:37 -20.9 Dark Up 79.5 9.8 Up 10:16:55 - 10:20:19 590
Klamath Falls 10:18:38 -20.8 Dark Up 79.8 11.1 Up 10:16:56 - 10:20:20 587
Hawthorne 10:18:24 -22.4 Dark Up 76.3 0.3 Up 10:16:42 - 10:20:06 578
Yerington 10:18:26 -22.3 Dark Up 76.7 1.7 Up 10:16:44 - 10:20:08 567
Reno 10:18:29 -22.2 Dark Up 77.3 3.5 Up 10:16:47 - 10:20:11 554
Yuma 10:18:04 -24.8 Dark Up 70.3 353.1 Up 10:16:22 - 10:19:46 551
Susanville 10:18:32 -21.8 Dark Up 78.1 6.2 Up 10:16:50 - 10:20:14 549
Fall River/Burney 10:18:35 -21.6 Dark Up 78.6 8.8 Up 10:16:53 - 10:20:17 538
Carson City 10:18:28 -22.4 Dark Up 76.9 3.4 Up 10:16:46 - 10:20:10 534
Bishop 10:18:21 -23.2 Dark Up 75.1 359.7 Up 10:16:39 - 10:20:03 526
Portola 10:18:30 -22.2 Dark Up 77.5 5.4 Up 10:16:48 - 10:20:12 525
Gardnerville 10:18:27 -22.6 Dark Up 76.7 3.2 Up 10:16:45 - 10:20:09 522
Gimple 10:18:32 -22.2 Dark Up 77.8 6.7 Up 10:16:50 - 10:20:14 517
Greenville 10:18:32 -22.2 Dark Up 77.8 6.9 Up 10:16:50 - 10:20:14 512
Lee Vining 10:18:24 -23.1 Dark Up 75.7 1.5 Up 10:16:42 - 10:20:06 508
Lone Pine 10:18:19 -23.7 Dark Up 74.4 359.0 Up 10:16:37 - 10:20:01 506
Calipatria 10:18:06 -25.0 Dark Up 70.8 354.6 Up 10:16:24 - 10:19:48 503
Quincy 10:18:31 -22.4 Dark Up 77.6 6.8 Up 10:16:49 - 10:20:13 499
Idyllwild 10:18:10 -25.2 Dark Up 71.5 356.6 Up 10:16:28 - 10:19:52 443
Wildwood 10:18:13 -25.9 Dark Up 71.9 0.2 Up 10:16:31 - 10:19:55 318
CPSLO 10:18:19 -26.0 Dark Up 73.0 4.5 Up 10:16:37 - 10:20:01 234

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, (2019/05/18 10:19UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 14.39  70
Etamin         17:56:36.3 +51:29:20  2.2  1.85  74
PPM 036381     18:06:53.5 +50:49:24  6.3  1.42  74
PPM 036414     18:10:13.8 +51:53:55  8.3  0.53  75
PPM 036393     18:07:45.5 +52:01:40  8.7  0.21  75
517717         18:07:33.9 +52:14:18 14.5        75
Positions are for J2000

Event circumstances last updated at 2019/05/13 22:15:05 UT

Marc W. Buie, Southwest Research Institute

RECON