RECON: TNO occultation with 523768

Event between (523768) 14WQ510 and star UC4-513-051704 with event index number of 347895

Geocentric closest approach at 2020/02/06 11:19:51 UTC

J2000 position of star is 10:14:59.8 +12:33:14
Equinox of date position of star is 10:16:00.2 +12:27:36
Stellar brightness R=15.4, use SENSEUP=128
Star is 52 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 45.2 AU from the Sun and 44.2 AU from the Earth.
The TNO is moving 25.5 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 90 seconds.
The 1-sigma cross-track error in the shadow position is 2244 km.
The sky-plane scale is 32067.5 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 17.9 sec chord
Diameter=186.6 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523768, (2020/02/06 11:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.4 +11:52:06  1.3  1.72  51
37 Leo         10:17:45.4 +13:37:39  5.4  1.24  52
PPM 127265     10:18:01.0 +12:48:44  8.1  0.60  52
PPM 127255     10:16:52.5 +12:07:24  9.7  0.38  52
PPM 127254     10:16:51.3 +12:34:23 11.1  0.23  52
523768         10:16:04.3 +12:27:12 15.4        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 13.0 km RECON observability=1.0 and success probability=14.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:19:17 -39.1 Dark Up 44.0 227.3 Up 11:11:19 - 11:27:14 230
Summerland 11:19:17 -39.3 Dark Up 44.2 226.9 Up 11:11:20 - 11:27:15 217
Penticton 11:19:16 -39.3 Dark Up 44.4 227.3 Up 11:11:18 - 11:27:13 201
Okanagan Falls 11:19:15 -39.4 Dark Up 44.5 227.4 Up 11:11:18 - 11:27:13 187
Oliver 11:19:15 -39.5 Dark Up 44.6 227.6 Up 11:11:18 - 11:27:13 176
Anarchist Mountain Observatory 11:19:14 -39.4 Dark Up 44.6 227.9 Up 11:11:17 - 11:27:12 170
Oroville 11:19:14 -39.5 Dark Up 44.7 227.9 Up 11:11:17 - 11:27:12 162
Tonasket 11:19:14 -39.6 Dark Up 44.9 228.1 Up 11:11:16 - 11:27:11 146
Okanogan 11:19:13 -39.8 Dark Up 45.2 228.1 Up 11:11:16 - 11:27:11 119
Brewster 11:19:13 -40.1 Dark Up 45.4 228.1 Up 11:11:15 - 11:27:10 94
Manson/Chelan 11:19:13 -40.4 Dark Up 45.8 227.8 Up 11:11:16 - 11:27:11 70
Entiat 11:19:13 -40.5 Dark Up 46.0 227.9 Up 11:11:15 - 11:27:10 52
Wenatchee 11:19:12 -40.7 Dark Up 46.2 228.0 Up 11:11:15 - 11:27:10 32
Ellensburg 11:19:12 -41.0 Dark Up 46.6 228.0 Up 11:11:14 - 11:27:09 -6
Pasco 11:19:06 -40.4 Dark Up 46.3 230.3 Up 11:11:09 - 11:27:04 -19
PNWRO 11:19:05 -40.4 Dark Up 46.4 230.8 Up 11:11:08 - 11:27:03 -30
Yakima 11:19:11 -41.2 Dark Up 46.8 228.3 Up 11:11:13 - 11:27:08 -34
Toppenish/White Swan 11:19:10 -41.2 Dark Up 46.9 228.7 Up 11:11:12 - 11:27:07 -45
George/Umatilla 11:19:06 -40.7 Dark Up 46.7 230.3 Up 11:11:08 - 11:27:03 -49
Niwot 11:18:18 -32.2 Dark Up 40.7 249.6 Up 11:10:21 - 11:26:16 -54
Goldendale 11:19:09 -41.7 Dark Up 47.5 228.6 Up 11:11:12 - 11:27:07 -98
The Dalles 11:19:09 -42.0 Dark Up 47.8 228.3 Up 11:11:12 - 11:27:07 -125
Maupin 11:19:08 -42.1 Dark Up 48.1 228.8 Up 11:11:11 - 11:27:06 -153
Madras/Culver 11:19:07 -42.3 Dark Up 48.4 229.2 Up 11:11:09 - 11:27:04 -195
Redmond 11:19:06 -42.5 Dark Up 48.7 229.5 Up 11:11:09 - 11:27:04 -224
Sisters 11:19:07 -42.7 Dark Up 48.9 229.0 Up 11:11:10 - 11:27:05 -234
Bend 11:19:06 -42.7 Dark Up 48.9 229.5 Up 11:11:08 - 11:27:03 -244
Oregon Observatory 11:19:06 -42.8 Dark Up 49.1 229.5 Up 11:11:08 - 11:27:03 -261
La Pine/Gilchrist 11:19:05 -42.9 Dark Up 49.3 229.6 Up 11:11:08 - 11:27:03 -279
North Lake 11:19:03 -42.7 Dark Up 49.2 230.7 Up 11:11:05 - 11:27:00 -294
Paisley 11:19:01 -42.7 Dark Up 49.4 231.6 Up 11:11:03 - 11:26:58 -326
Lakeview 11:18:59 -42.7 Dark Up 49.6 232.3 Up 11:11:01 - 11:26:56 -360
Chiloquin 11:19:04 -43.6 Dark Up 50.2 230.1 Up 11:11:06 - 11:27:01 -375
Klamath Falls 11:19:02 -43.7 Dark Up 50.4 230.5 Up 11:11:05 - 11:27:00 -400
Cedarville 11:18:57 -42.8 Dark Up 49.9 233.1 Up 11:10:59 - 11:26:54 -406
Tulelake 11:19:01 -43.6 Dark Up 50.4 231.2 Up 11:11:03 - 11:26:58 -412
Fall River/Burney 11:18:58 -43.8 Dark Up 50.9 232.1 Up 11:11:01 - 11:26:56 -482
Susanville 11:18:55 -43.5 Dark Up 50.8 233.6 Up 11:10:57 - 11:26:52 -509
Gimple 11:18:55 -43.8 Dark Up 51.1 233.6 Up 11:10:57 - 11:26:52 -538
Greenville 11:18:55 -43.8 Dark Up 51.2 233.5 Up 11:10:58 - 11:26:53 -540
Portola 11:18:53 -43.6 Dark Up 51.1 234.4 Up 11:10:56 - 11:26:51 -552
Reno 11:18:50 -43.2 Dark Up 50.8 235.5 Up 11:10:53 - 11:26:48 -553
Quincy 11:18:55 -43.9 Dark Up 51.3 233.7 Up 11:10:57 - 11:26:52 -557
Yerington 11:18:48 -42.9 Dark Up 50.7 236.8 Up 11:10:50 - 11:26:45 -577
Carson City 11:18:50 -43.3 Dark Up 51.0 235.8 Up 11:10:52 - 11:26:47 -581
Tonopah 11:18:40 -41.7 Dark Up 49.9 239.9 Up 11:10:43 - 11:26:38 -591
Hawthorne 11:18:45 -42.6 Dark Up 50.6 237.8 Up 11:10:48 - 11:26:43 -598
Gardnerville 11:18:49 -43.3 Dark Up 51.1 236.1 Up 11:10:52 - 11:26:47 -600
Lee Vining 11:18:45 -43.1 Dark Up 51.3 237.9 Up 11:10:47 - 11:26:42 -660
Indian Springs 11:18:32 -40.8 Dark Up 49.6 243.0 Up 11:10:35 - 11:26:30 -662
Beatty 11:18:36 -41.6 Dark Up 50.2 241.5 Up 11:10:38 - 11:26:33 -671
Henderson 11:18:29 -40.4 Dark Up 49.3 244.2 Up 11:10:32 - 11:26:27 -684
Bishop 11:18:42 -42.7 Dark Up 51.1 239.3 Up 11:10:44 - 11:26:39 -686
Patrick 11:18:25 -39.6 Dark Up 48.8 246.0 Up 11:10:27 - 11:26:22 -699
DCO 11:18:22 -39.1 Dark Up 48.4 247.0 Up 11:10:25 - 11:26:20 -700
Kingman/Dolan Springs 11:18:25 -39.8 Dark Up 49.0 246.0 Up 11:10:27 - 11:26:22 -723
Searchlight/Boulder City 11:18:28 -40.4 Dark Up 49.5 244.9 Up 11:10:30 - 11:26:25 -729
Lone Pine 11:18:39 -42.6 Dark Up 51.2 240.5 Up 11:10:41 - 11:26:36 -738
Laughlin/Bullhead City 11:18:26 -40.2 Dark Up 49.4 245.6 Up 11:10:28 - 11:26:23 -743
Mohave Valley 11:18:25 -40.2 Dark Up 49.5 245.9 Up 11:10:28 - 11:26:23 -765
Lake Havasu City 11:18:24 -40.1 Dark Up 49.5 246.5 Up 11:10:26 - 11:26:21 -790
Parker 11:18:23 -40.1 Dark Up 49.6 246.9 Up 11:10:25 - 11:26:20 -819
Blythe 11:18:22 -40.5 Dark Up 50.1 247.2 Up 11:10:24 - 11:26:19 -873
CPSLO 11:18:43 -45.0 Dark Up 53.7 239.0 Up 11:10:45 - 11:26:40 -933
Idyllwild 11:18:28 -42.2 Dark Up 51.6 245.0 Up 11:10:31 - 11:26:26 -935
Calipatria 11:18:24 -41.3 Dark Up 51.0 246.9 Up 11:10:26 - 11:26:21 -947
Yuma 11:18:20 -40.6 Dark Up 50.4 248.2 Up 11:10:23 - 11:26:18 -954
Wildwood 11:18:34 -43.6 Dark Up 52.8 242.7 Up 11:10:37 - 11:26:32 -968

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 523768, (2020/02/06 11:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  1.72  51
37 Leo         10:16:40.7 +13:43:42  5.4  1.24  52
PPM 127265     10:16:56.6 +12:54:48  8.1  0.60  52
PPM 127255     10:15:48.1 +12:13:26  9.7  0.38  52
PPM 127254     10:15:46.9 +12:40:25 11.1  0.23  52
523768         10:14:59.8 +12:33:14 15.4        52
Positions are for J2000

Event circumstances last updated at 2018/10/25 20:53:55 UT

Marc W. Buie, Southwest Research Institute

RECON