RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1120:10319310 with event index number of 324510

Geocentric closest approach at 2020/05/10 07:14:10 UTC

J2000 position of star is 19:38:06.5 +22:02:06
Equinox of date position of star is 19:38:58.3 +22:04:54
Stellar brightness G=15.3, use SENSEUP=128
Star is 52 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 27.0 AU from the Sun and 26.8 AU from the Earth.
The TNO is moving 15.5 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 105 seconds.
The 1-sigma cross-track error in the shadow position is 1976 km.
The sky-plane scale is 19401.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 14.7 sec chord
Diameter=93.5 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2020/05/10 07:14UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:37.7 +38:48:13  0.0 21.25  63
Tarazed        19:47:13.6 +10:39:51  2.7 11.59  44
PPM 109310     19:37:00.6 +22:37:55  6.1  0.71  52
PPM 109351     19:37:59.2 +22:03:09  7.2  0.23  52
PPM 109395     19:39:07.7 +21:55:54  9.0  0.15  52
523700         19:38:59.1 +22:04:56 15.3        52
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 25.2 km RECON observability=1.0 and success probability=24.5%
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 07:20:04 -21.6 Dark Up 26.1 86.3 Low 07:10:47 - 07:29:21 599
Kelowna 07:20:04 -21.9 Dark Up 25.9 85.9 Low 07:10:47 - 07:29:21 557
Summerland 07:20:03 -22.2 Dark Up 25.8 85.7 Low 07:10:46 - 07:29:20 528
Penticton 07:20:03 -22.3 Dark Up 25.8 85.7 Low 07:10:46 - 07:29:20 521
Oliver 07:20:03 -22.6 Dark Up 25.8 85.6 Low 07:10:46 - 07:29:20 483
Anarchist Mountain Observatory 07:20:01 -22.8 Dark Up 25.9 85.6 Low 07:10:44 - 07:29:18 465
Tonasket 07:20:01 -23.1 Dark Up 25.9 85.4 Low 07:10:44 - 07:29:18 432
Victoria 07:20:09 -22.8 Dark Up 23.2 82.5 Low 07:10:52 - 07:29:26 407
Okanogan 07:20:01 -23.4 Dark Up 25.7 85.1 Low 07:10:44 - 07:29:18 395
Brewster 07:20:01 -23.7 Dark Up 25.6 84.9 Low 07:10:44 - 07:29:18 366
Manson/Chelan 07:20:02 -23.8 Dark Up 25.3 84.5 Low 07:10:45 - 07:29:19 343
Entiat 07:20:01 -24.0 Dark Up 25.2 84.3 Low 07:10:44 - 07:29:18 319
Wenatchee 07:20:01 -24.3 Dark Up 25.1 84.2 Low 07:10:44 - 07:29:18 291
Ellensburg 07:20:00 -24.7 Dark Up 24.9 83.8 Low 07:10:43 - 07:29:17 247
Yakima 07:20:00 -25.1 Dark Up 24.9 83.6 Low 07:10:43 - 07:29:17 204
Toppenish/White Swan 07:19:59 -25.3 Dark Up 25.0 83.6 Low 07:10:42 - 07:29:16 181
Pasco 07:19:56 -25.6 Dark Up 25.8 84.4 Low 07:10:39 - 07:29:13 173
PNWRO 07:19:55 -25.8 Dark Up 26.0 84.5 Low 07:10:38 - 07:29:12 148
Goldendale 07:19:59 -25.8 Dark Up 24.6 83.1 Low 07:10:42 - 07:29:16 122
The Dalles 07:19:59 -26.0 Dark Up 24.3 82.7 Low 07:10:42 - 07:29:16 98
Maupin 07:19:58 -26.4 Dark Up 24.4 82.6 Low 07:10:41 - 07:29:15 54
Sisters 07:19:57 -27.2 Dark Up 23.9 81.9 Low 07:10:40 - 07:29:14 -39
Redmond 07:19:56 -27.3 Dark Up 24.2 82.1 Low 07:10:39 - 07:29:13 -41
Bend 07:19:56 -27.4 Dark Up 24.0 81.9 Low 07:10:39 - 07:29:13 -64
Oregon Observatory 07:19:56 -27.6 Dark Up 23.9 81.8 Low 07:10:39 - 07:29:13 -82
La Pine/Gilchrist 07:19:55 -27.8 Dark Up 23.8 81.7 Low 07:10:38 - 07:29:12 -104
North Lake 07:19:53 -28.3 Dark Up 24.2 81.8 Low 07:10:36 - 07:29:10 -148
Paisley 07:19:51 -28.9 Dark Up 24.4 81.8 Low 07:10:34 - 07:29:08 -204
Klamath Falls 07:19:53 -29.2 Dark Up 23.4 80.8 Low 07:10:36 - 07:29:10 -254
Lakeview 07:19:49 -29.4 Dark Up 24.4 81.7 Low 07:10:32 - 07:29:06 -256
Niwot 07:19:05 -31.9 Dark Up 35.6 89.9 Up 07:09:48 - 07:28:22 -274
SwRI 07:19:05 -32.0 Dark Up 35.5 89.8 Up 07:09:48 - 07:28:22 -286
Cedarville 07:19:47 -30.1 Dark Up 24.5 81.5 Low 07:10:30 - 07:29:04 -323
Fall River/Burney 07:19:48 -30.4 Dark Up 23.5 80.6 Low 07:10:31 - 07:29:05 -375
Susanville 07:19:45 -31.1 Dark Up 23.9 80.7 Low 07:10:28 - 07:29:02 -437
Gimple 07:19:45 -31.3 Dark Up 23.7 80.5 Low 07:10:28 - 07:29:02 -466
Greenville 07:19:46 -31.3 Dark Up 23.7 80.4 Low 07:10:29 - 07:29:03 -466
Quincy 07:19:45 -31.5 Dark Up 23.6 80.3 Low 07:10:28 - 07:29:02 -486
Portola 07:19:43 -31.7 Dark Up 24.0 80.6 Low 07:10:26 - 07:29:00 -498
Reno 07:19:41 -32.1 Dark Up 24.4 80.8 Low 07:10:24 - 07:28:58 -523
Carson City 07:19:40 -32.4 Dark Up 24.4 80.7 Low 07:10:23 - 07:28:57 -559
Yerington 07:19:37 -32.7 Dark Up 24.8 80.9 Low 07:10:20 - 07:28:54 -576
Gardnerville 07:19:39 -32.7 Dark Up 24.4 80.6 Low 07:10:22 - 07:28:56 -583
Hawthorne 07:19:35 -33.2 Dark Up 25.1 81.0 Low 07:10:18 - 07:28:52 -620
Tonopah 07:19:30 -33.9 Dark Up 26.2 81.6 Low 07:10:13 - 07:28:47 -658
Lee Vining 07:19:35 -33.7 Dark Up 24.7 80.5 Low 07:10:18 - 07:28:52 -679
Bishop 07:19:32 -34.4 Dark Up 25.1 80.6 Low 07:10:15 - 07:28:49 -734
Beatty 07:19:25 -35.0 Dark Up 26.3 81.3 Low 07:10:08 - 07:28:42 -768
Indian Springs 07:19:22 -35.5 Dark Up 27.1 81.7 Low 07:10:05 - 07:28:39 -791
Henderson 07:19:18 -36.0 Dark Up 27.6 81.8 Low 07:10:01 - 07:28:35 -836
Patrick 07:19:13 -36.7 Dark Up 28.4 82.0 Low 07:09:56 - 07:28:30 -884
Searchlight/Boulder City 07:19:16 -36.6 Dark Up 27.6 81.5 Low 07:09:59 - 07:28:33 -891
DCO 07:19:10 -37.1 Dark Up 28.9 82.2 Low 07:09:53 - 07:28:27 -905
Kingman/Dolan Springs 07:19:13 -37.0 Dark Up 28.2 81.8 Low 07:09:56 - 07:28:30 -908
Laughlin/Bullhead City 07:19:14 -36.9 Dark Up 27.8 81.5 Low 07:09:57 - 07:28:31 -916
Mohave Valley 07:19:13 -37.2 Dark Up 27.7 81.4 Low 07:09:56 - 07:28:30 -942
CPSLO 07:19:31 -36.1 Dark Up 23.0 78.5 Low 07:10:14 - 07:28:48 -944
Lake Havasu City 07:19:12 -37.6 Dark Up 27.9 81.3 Low 07:09:55 - 07:28:29 -978
Parker 07:19:11 -38.0 Dark Up 27.8 81.1 Low 07:09:54 - 07:28:28 -1011
George/Scottsdale 07:19:01 -38.5 Dark Up 29.8 82.1 Low 07:09:44 - 07:28:18 -1019
Wildwood 07:19:21 -37.6 Dark Up 24.4 79.0 Low 07:10:04 - 07:28:38 -1053
Blythe 07:19:09 -38.5 Dark Up 27.5 80.7 Low 07:09:52 - 07:28:26 -1064
Idyllwild 07:19:14 -38.2 Dark Up 25.8 79.7 Low 07:09:57 - 07:28:31 -1075
Calipatria 07:19:10 -38.9 Dark Up 26.7 80.0 Low 07:09:53 - 07:28:27 -1121
Yuma 07:19:06 -39.4 Dark Up 27.3 80.2 Low 07:09:49 - 07:28:23 -1152

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, (2020/05/10 07:14UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 21.25  63
Tarazed        19:46:15.6 +10:36:48  2.7 11.59  44
PPM 109310     19:36:08.3 +22:35:08  6.1  0.71  52
PPM 109351     19:37:06.7 +22:00:21  7.2  0.23  52
PPM 109395     19:38:15.1 +21:53:03  9.0  0.15  52
523700         19:38:06.5 +22:02:06 15.3        52
Positions are for J2000

Event circumstances last updated at 2020/01/21 20:46:31 UT

Marc W. Buie, Southwest Research Institute

RECON