RECON: TNO occultation with 01XR254

Event between 01XR254 and star GA1080:03047326 with event index number of 174291

Geocentric closest approach at 2019/01/16 09:40:18 UTC

J2000 position of star is 08:14:51.7 +18:43:53
Equinox of date position of star is 08:15:56.7 +18:40:23
Stellar brightness G=15.3, use SENSEUP=128
Star is 70 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 43.9 AU from the Sun and 42.9 AU from the Earth.
The TNO is moving 25.7 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 716 seconds.
The 1-sigma cross-track error in the shadow position is 4680 km.
The sky-plane scale is 31147.9 km/arcsec.

The TNO has an absolute magnitude Hv=5.8
Diameter=416.9 km assuming a 5% albedo -- 16.2 sec chord
Diameter=170.2 km assuming a 30% albedo -- 6.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 01XR254, (2019/01/16 09:40UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.7 +27:58:43  1.1 11.50  63
16Zet2Cnc      08:13:18.3 +17:35:22  5.2  1.25  70
PPM 125077     08:18:02.0 +17:52:26  8.5  0.94  71
PPM 124991     08:13:37.5 +18:27:30  9.4  0.59  70
PPM 125056     08:17:08.6 +18:38:18 10.4  0.28  71
01XR254        08:15:57.4 +18:40:20 15.3        71
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 1.3 sigma about the mid-time.
The median site spacing is 19.3 km RECON observability=1.0 and success probability=4.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:40:00 -55.7 Dark Up 55.9 210.4 Up 09:25:00 - 09:55:00 8494
Summerland 09:40:01 -55.9 Dark Up 56.0 209.8 Up 09:25:01 - 09:55:01 8483
Penticton 09:39:59 -56.1 Dark Up 56.2 210.4 Up 09:24:59 - 09:54:59 8459
Okanagan Falls 09:40:00 -56.2 Dark Up 56.4 210.5 Up 09:25:00 - 09:55:00 8442
Oliver 09:39:58 -56.3 Dark Up 56.5 210.6 Up 09:24:58 - 09:54:58 8429
Anarchist Mountain Observatory 09:39:59 -56.4 Dark Up 56.6 211.1 Up 09:24:59 - 09:54:59 8418
Oroville 09:39:59 -56.5 Dark Up 56.7 211.0 Up 09:24:59 - 09:54:59 8410
Tonasket 09:39:59 -56.7 Dark Up 56.9 211.2 Up 09:24:59 - 09:54:59 8389
Okanogan 09:39:57 -57.0 Dark Up 57.2 211.2 Up 09:24:57 - 09:54:57 8357
Brewster 09:39:58 -57.3 Dark Up 57.5 211.1 Up 09:24:58 - 09:54:58 8328
Manson/Chelan 09:39:59 -57.6 Dark Up 57.8 210.7 Up 09:24:59 - 09:54:59 8302
Entiat 09:39:57 -57.8 Dark Up 58.1 210.7 Up 09:24:57 - 09:54:57 8281
Wenatchee 09:39:59 -58.0 Dark Up 58.3 210.8 Up 09:24:59 - 09:54:59 8256
Ellensburg 09:39:59 -58.4 Dark Up 58.7 210.8 Up 09:24:59 - 09:54:59 8214
Pasco 09:39:52 -58.3 Dark Up 58.9 213.8 Up 09:24:52 - 09:54:52 8180
Yakima 09:39:57 -58.7 Dark Up 59.1 211.1 Up 09:24:57 - 09:54:57 8177
PNWRO 09:39:53 -58.4 Dark Up 59.0 214.4 Up 09:24:53 - 09:54:53 8163
Toppenish/White Swan 09:39:56 -58.8 Dark Up 59.2 211.5 Up 09:24:56 - 09:54:56 8161
George/Umatilla 09:39:53 -58.6 Dark Up 59.2 213.7 Up 09:24:53 - 09:54:53 8144
Goldendale 09:39:56 -59.4 Dark Up 59.9 211.3 Up 09:24:56 - 09:54:56 8101
The Dalles 09:39:58 -59.8 Dark Up 60.2 210.9 Up 09:24:58 - 09:54:58 8072
Maupin 09:39:57 -60.0 Dark Up 60.5 211.4 Up 09:24:57 - 09:54:57 8037
Niwot 09:39:03 -53.1 Dark Down 55.6 240.9 Up 09:24:03 - 09:54:03 7999
Madras/Culver 09:39:56 -60.4 Dark Up 61.0 211.9 Up 09:24:56 - 09:54:56 7985
Redmond 09:39:55 -60.7 Dark Up 61.3 212.1 Up 09:24:55 - 09:54:55 7951
Sisters 09:39:57 -60.9 Dark Up 61.4 211.4 Up 09:24:57 - 09:54:57 7944
Bend 09:39:56 -60.9 Dark Up 61.5 212.1 Up 09:24:56 - 09:54:56 7928
Oregon Observatory 09:39:56 -61.1 Dark Up 61.7 212.0 Up 09:24:56 - 09:54:56 7909
La Pine/Gilchrist 09:39:56 -61.3 Dark Up 61.9 212.1 Up 09:24:56 - 09:54:56 7888
North Lake 09:39:53 -61.3 Dark Up 62.1 213.6 Up 09:24:53 - 09:54:53 7862
Paisley 09:39:51 -61.5 Dark Up 62.4 214.9 Up 09:24:51 - 09:54:51 7819
Lakeview 09:39:50 -61.7 Dark Up 62.7 215.8 Up 09:24:50 - 09:54:50 7777
Chiloquin 09:39:55 -62.3 Dark Up 63.0 212.6 Up 09:24:55 - 09:54:55 7776
Klamath Falls 09:39:54 -62.5 Dark Up 63.3 213.1 Up 09:24:54 - 09:54:54 7745
Tulelake 09:39:52 -62.5 Dark Up 63.4 213.9 Up 09:24:52 - 09:54:52 7727
Cedarville 09:39:47 -62.1 Dark Up 63.2 216.8 Up 09:24:47 - 09:54:47 7719
Fall River/Burney 09:39:50 -63.1 Dark Up 64.1 215.1 Up 09:24:50 - 09:54:50 7643
Susanville 09:39:48 -63.1 Dark Up 64.3 217.3 Up 09:24:48 - 09:54:48 7601
Gimple 09:39:48 -63.4 Dark Up 64.6 217.2 Up 09:24:48 - 09:54:48 7569
Greenville 09:39:48 -63.4 Dark Up 64.6 217.1 Up 09:24:48 - 09:54:48 7567
Quincy 09:39:47 -63.6 Dark Up 64.8 217.3 Up 09:24:47 - 09:54:47 7548
Portola 09:39:46 -63.4 Dark Up 64.7 218.4 Up 09:24:46 - 09:54:46 7548
Reno 09:39:44 -63.1 Dark Up 64.6 220.0 Up 09:24:44 - 09:54:44 7539
Carson City 09:39:42 -63.3 Dark Up 64.8 220.5 Up 09:24:42 - 09:54:42 7505
Yerington 09:39:41 -63.0 Dark Up 64.7 221.9 Up 09:24:41 - 09:54:41 7503
Gardnerville 09:39:42 -63.4 Dark Up 65.0 220.9 Up 09:24:42 - 09:54:42 7483
Hawthorne 09:39:38 -63.0 Dark Up 64.7 223.6 Up 09:24:38 - 09:54:38 7472
Tonopah 09:39:34 -62.3 Dark Up 64.3 226.7 Up 09:24:34 - 09:54:34 7465
Lee Vining 09:39:39 -63.6 Dark Up 65.4 223.5 Up 09:24:39 - 09:54:39 7405
Bishop 09:39:35 -63.5 Dark Up 65.4 225.7 Up 09:24:35 - 09:54:35 7366
Beatty 09:39:31 -62.6 Dark Up 64.8 229.3 Up 09:24:31 - 09:54:31 7366
Indian Springs 09:39:26 -62.0 Dark Up 64.3 231.6 Up 09:24:26 - 09:54:26 7364
Henderson 09:39:23 -61.7 Dark Up 64.2 233.6 Up 09:24:23 - 09:54:23 7332
Patrick 09:39:18 -61.1 Dark Up 63.9 236.3 Up 09:24:18 - 09:54:18 7304
Lone Pine 09:39:33 -63.6 Dark Up 65.8 227.5 Up 09:24:33 - 09:54:33 7301
DCO 09:39:15 -60.7 Dark Up 63.5 237.9 Up 09:24:15 - 09:54:15 7295
Searchlight/Boulder City 09:39:21 -61.9 Dark Up 64.5 234.7 Up 09:24:21 - 09:54:21 7278
Kingman/Dolan Springs 09:39:18 -61.4 Dark Up 64.1 236.4 Up 09:24:18 - 09:54:18 7277
Laughlin/Bullhead City 09:39:20 -61.8 Dark Up 64.5 235.7 Up 09:24:20 - 09:54:20 7260
Mohave Valley 09:39:20 -61.9 Dark Up 64.6 236.2 Up 09:24:20 - 09:54:20 7233
Lake Havasu City 09:39:18 -61.8 Dark Up 64.7 237.3 Up 09:24:18 - 09:54:18 7201
Parker 09:39:17 -61.9 Dark Up 64.8 237.9 Up 09:24:17 - 09:54:17 7168
Blythe 09:39:17 -62.3 Dark Up 65.3 238.4 Up 09:24:17 - 09:54:17 7108
CPSLO 09:39:39 -66.1 Dark Up 68.2 224.8 Up 09:24:39 - 09:54:39 7103
Idyllwild 09:39:24 -63.9 Dark Up 66.7 234.9 Up 09:24:24 - 09:54:24 7057
Wildwood 09:39:31 -65.2 Dark Up 67.7 231.0 Up 09:24:31 - 09:54:31 7039
Calipatria 09:39:19 -63.2 Dark Up 66.2 237.9 Up 09:24:19 - 09:54:19 7031
Yuma 09:39:16 -62.7 Dark Up 65.8 240.1 Up 09:24:16 - 09:54:16 7015

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 01XR254, (2019/01/16 09:40UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 11.50  63
16Zet2Cnc      08:12:12.9 +17:38:51  5.2  1.25  70
PPM 125077     08:16:56.7 +17:56:01  8.5  0.94  71
PPM 124991     08:12:31.8 +18:30:59  9.4  0.59  70
PPM 125056     08:16:02.9 +18:41:52 10.4  0.28  71
01XR254        08:14:51.7 +18:43:53 15.3        70
Positions are for J2000

Event circumstances last updated at 2018/11/04 22:25:13 UT

Marc W. Buie, Southwest Research Institute

RECON