RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star UC4-566-080471 with event index number of 324358

Geocentric closest approach at 2019/08/23 03:49:15 UTC

J2000 position of star is 19:15:48.5 +23:01:51
Equinox of date position of star is 19:16:36.3 +23:03:54
Stellar brightness R=15.8, use SENSEUP=128
Star is 113 degrees from the moon. Moon is 55% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 26.8 AU from the Sun and 26.2 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 4.6 arcsec/hr.
The 1-sigma error in the time of the event is 46 seconds.
The 1-sigma cross-track error in the shadow position is 1252 km.
The sky-plane scale is 18975.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.4 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2019/08/23 03:49UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:36.2 +38:48:10  0.0 17.80 111
Tarazed        19:47:11.6 +10:39:44  2.7 14.39 112
2 Vul          19:18:33.5 +23:03:43  5.2  0.44 113
PPM 108713     19:18:01.4 +22:27:44  7.9  0.68 113
PPM 108676     19:16:31.2 +22:58:39  9.4  0.09 113
523700         19:16:38.4 +23:04:00 15.8       113
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 21.0 km RECON observability=0.2 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)
Summerland 03:48:23 -7.5 NT Down 58.8 141.7 Up 03:44:02 - 03:52:43 8482
Kelowna 03:48:22 -7.7 NT Down 58.9 142.3 Up 03:44:02 - 03:52:43 8462
Penticton 03:48:24 -7.7 NT Down 59.1 141.7 Up 03:44:04 - 03:52:45 8458
Okanagan Falls 03:48:24 -7.8 NT Down 59.2 141.4 Up 03:44:04 - 03:52:45 8452
Oliver 03:48:25 -7.9 NT Down 59.4 141.3 Up 03:44:05 - 03:52:46 8444
Manson/Chelan 03:48:30 -8.2 NT Down 60.1 138.9 Up 03:44:09 - 03:52:50 8427
Oroville 03:48:25 -8.1 NT Down 59.6 141.2 Up 03:44:04 - 03:52:45 8427
Anarchist Mountain Observatory 03:48:26 -8.1 NT Down 59.6 141.5 Up 03:44:06 - 03:52:47 8425
Entiat 03:48:32 -8.2 NT Down 60.3 138.6 Up 03:44:12 - 03:52:53 8422
Wenatchee 03:48:32 -8.3 NT Down 60.4 138.1 Up 03:44:11 - 03:52:52 8418
Tonasket 03:48:26 -8.2 NT Down 59.8 141.0 Up 03:44:06 - 03:52:47 8417
Ellensburg 03:48:35 -8.4 NT Down 60.6 137.3 Up 03:44:14 - 03:52:55 8414
Brewster 03:48:29 -8.3 NT Down 60.1 139.8 Up 03:44:08 - 03:52:49 8413
Okanogan 03:48:29 -8.3 NT Down 60.0 140.4 Up 03:44:08 - 03:52:49 8412
Yakima 03:48:35 -8.5 NT Down 60.9 136.8 Up 03:44:15 - 03:52:56 8399
The Dalles 03:48:42 -8.6 NT Down 61.3 134.6 Up 03:44:21 - 03:53:02 8396
Goldendale 03:48:39 -8.7 NT Down 61.3 135.4 Up 03:44:19 - 03:53:00 8382
Toppenish/White Swan 03:48:38 -8.7 NT Down 61.1 136.8 Up 03:44:18 - 03:52:59 8379
Maupin 03:48:44 -8.9 NT Down 61.7 134.2 Up 03:44:23 - 03:53:04 8372
Sisters 03:48:46 -9.0 NT Down 62.0 132.2 Up 03:44:26 - 03:53:07 8366
Madras/Culver 03:48:45 -9.1 NT Down 62.0 133.4 Up 03:44:25 - 03:53:06 8351
Oregon Observatory 03:48:49 -9.2 NT Down 62.4 131.9 Up 03:44:28 - 03:53:09 8340
Redmond 03:48:47 -9.2 NT Down 62.3 132.8 Up 03:44:27 - 03:53:08 8339
Bend 03:48:48 -9.2 NT Down 62.3 132.3 Up 03:44:28 - 03:53:09 8339
La Pine/Gilchrist 03:48:48 -9.3 NT Down 62.5 131.5 Up 03:44:28 - 03:53:09 8335
Chiloquin 03:48:55 -9.5 NT Down 63.0 129.3 Up 03:44:35 - 03:53:16 8310
Pasco 03:48:36 -9.6 NT Down 61.8 138.8 Up 03:44:15 - 03:52:56 8295
George/Umatilla 03:48:37 -9.6 NT Down 62.0 138.0 Up 03:44:16 - 03:52:57 8294
Klamath Falls 03:48:55 -9.7 NT Down 63.3 128.9 Up 03:44:34 - 03:53:15 8290
North Lake 03:48:51 -9.9 NT Down 63.1 131.8 Up 03:44:30 - 03:53:11 8277
PNWRO 03:48:37 -9.8 NT Down 62.1 138.9 Up 03:44:16 - 03:52:57 8270
Tulelake 03:48:58 -10.1 NT Down 63.6 129.0 Up 03:44:37 - 03:53:18 8257
Paisley 03:48:51 -10.3 NT Down 63.7 131.6 Up 03:44:31 - 03:53:12 8228
Fall River/Burney 03:49:01 -10.5 NT Down 64.3 127.7 Up 03:44:40 - 03:53:21 8211
Lakeview 03:48:53 -10.7 NT Down 64.1 131.2 Up 03:44:33 - 03:53:14 8193
Cedarville 03:48:56 -11.1 NT Down 64.7 130.4 Up 03:44:35 - 03:53:16 8151
Greenville 03:49:03 -11.2 NT Down 65.1 126.9 Up 03:44:42 - 03:53:23 8139
Gimple 03:49:02 -11.3 NT Down 65.1 127.0 Up 03:44:41 - 03:53:22 8133
Susanville 03:49:00 -11.3 NT Down 65.1 127.8 Up 03:44:40 - 03:53:21 8131
Quincy 03:49:03 -11.3 NT Down 65.2 126.6 Up 03:44:43 - 03:53:24 8129
Portola 03:49:03 -11.7 NT Down 65.6 127.1 Up 03:44:42 - 03:53:23 8090
Reno 03:49:03 -12.3 AT Down 66.1 127.7 Up 03:44:42 - 03:53:23 8032
Carson City 03:49:05 -12.4 AT Down 66.4 127.1 Up 03:44:44 - 03:53:25 8013
Gardnerville 03:49:06 -12.6 AT Down 66.5 126.8 Up 03:44:46 - 03:53:27 7998
Yerington 03:49:05 -13.0 AT Down 66.9 127.9 Up 03:44:44 - 03:53:25 7959
Lee Vining 03:49:07 -13.5 AT Down 67.5 126.0 Up 03:44:46 - 03:53:27 7905
Hawthorne 03:49:05 -13.6 AT Down 67.5 127.9 Up 03:44:44 - 03:53:25 7899
CPSLO 03:49:22 -13.6 AT Down 67.9 118.1 Up 03:45:01 - 03:53:42 7882
Bishop 03:49:10 -14.3 AT Down 68.3 126.1 Up 03:44:49 - 03:53:30 7823
Tonopah 03:49:05 -14.8 AT Down 68.6 129.6 Up 03:44:44 - 03:53:25 7775
Lone Pine 03:49:12 -14.9 AT Down 69.0 125.1 Up 03:44:52 - 03:53:33 7760
Beatty 03:49:09 -15.6 AT Down 69.7 128.2 Up 03:44:48 - 03:53:29 7682
Wildwood 03:49:23 -15.6 AT Down 70.0 118.6 Up 03:45:03 - 03:53:44 7667
Indian Springs 03:49:08 -16.5 AT Down 70.5 129.6 Up 03:44:47 - 03:53:28 7586
Henderson 03:49:08 -17.3 AT Down 71.3 129.9 Up 03:44:48 - 03:53:29 7507
Idyllwild 03:49:20 -17.2 AT Down 71.5 121.0 Up 03:45:00 - 03:53:41 7506
Searchlight/Boulder City 03:49:09 -17.6 AT Down 71.7 128.7 Up 03:44:49 - 03:53:30 7470
Laughlin/Bullhead City 03:49:11 -18.0 Dark Down 72.1 128.7 Up 03:44:50 - 03:53:31 7428
Mohave Valley 03:49:12 -18.2 Dark Down 72.3 128.1 Up 03:44:51 - 03:53:32 7412
Kingman/Dolan Springs 03:49:09 -18.4 Dark Down 72.4 129.9 Up 03:44:49 - 03:53:30 7391
Patrick 03:49:07 -18.4 Dark Down 72.4 130.9 Up 03:44:46 - 03:53:27 7390
Calipatria 03:49:19 -18.3 Dark Down 72.7 121.6 Up 03:44:59 - 03:53:40 7383
Lake Havasu City 03:49:10 -18.5 Dark Down 72.7 127.6 Up 03:44:50 - 03:53:31 7371
Parker 03:49:13 -18.7 Dark Down 73.0 126.8 Up 03:44:53 - 03:53:34 7349
Blythe 03:49:17 -18.8 Dark Down 73.1 124.8 Up 03:44:56 - 03:53:37 7341
DCO 03:49:08 -19.1 Dark Down 73.1 131.8 Up 03:44:48 - 03:53:29 7321
Yuma 03:49:20 -19.2 Dark Down 73.6 122.2 Up 03:45:00 - 03:53:41 7291
Niwot 03:48:32 -21.4 Dark Down 72.2 162.2 Up 03:44:12 - 03:52:53 7059

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 523700, (2019/08/23 03:49UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 17.80 111
Tarazed        19:46:15.6 +10:36:48  2.7 14.39 112
2 Vul          19:17:43.7 +23:01:32  5.2  0.44 113
PPM 108713     19:17:11.2 +22:25:33  7.9  0.68 113
PPM 108676     19:15:41.3 +22:56:31  9.4  0.09 113
523700         19:15:48.5 +23:01:51 15.8       113
Positions are for J2000

Event circumstances last updated at 2018/10/25 20:29:20 UT

Marc W. Buie, Southwest Research Institute

RECON