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 09:46:04 UTC

J2000 position of star is 08:14:51.7 +18:43:53
Equinox of date position of star is 08:15:55.3 +18:40:27
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 469 seconds.
The 1-sigma cross-track error in the shadow position is 2215 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 09:46UT)
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 1.9 sigma about the mid-time.
The median site spacing is 20.9 km RECON observability=1.0 and success probability=1.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 09:48:05 -55.2 Dark Up 55.5 213.6 Up 09:33:05 - 10:03:05 8674
Oroville 09:48:02 -55.6 Dark Up 56.0 214.2 Up 09:33:02 - 10:03:02 8625
Tonasket 09:48:02 -55.7 Dark Up 56.2 214.4 Up 09:33:02 - 10:03:02 8605
Okanogan 09:48:02 -56.0 Dark Up 56.5 214.5 Up 09:33:02 - 10:03:02 8572
Brewster 09:48:02 -56.3 Dark Up 56.8 214.4 Up 09:33:02 - 10:03:02 8544
Manson/Chelan 09:48:02 -56.7 Dark Up 57.1 214.0 Up 09:33:02 - 10:03:02 8517
Entiat 09:48:02 -56.8 Dark Up 57.3 214.1 Up 09:33:02 - 10:03:02 8496
Wenatchee 09:48:02 -57.1 Dark Up 57.6 214.1 Up 09:33:02 - 10:03:02 8472
Ellensburg 09:48:03 -57.5 Dark Up 58.0 214.1 Up 09:33:03 - 10:03:03 8430
Pasco 09:47:57 -57.3 Dark Up 58.1 217.1 Up 09:32:57 - 10:02:57 8397
Yakima 09:48:01 -57.8 Dark Up 58.4 214.5 Up 09:33:01 - 10:03:01 8393
PNWRO 09:47:57 -57.3 Dark Up 58.2 217.7 Up 09:32:57 - 10:02:57 8381
Toppenish/White Swan 09:48:01 -57.8 Dark Up 58.5 214.9 Up 09:33:01 - 10:03:01 8378
George/Umatilla 09:47:57 -57.6 Dark Up 58.4 217.1 Up 09:32:57 - 10:02:57 8362
Goldendale 09:48:01 -58.4 Dark Up 59.1 214.8 Up 09:33:01 - 10:03:01 8318
The Dalles 09:48:02 -58.8 Dark Up 59.4 214.4 Up 09:33:02 - 10:03:02 8289
Maupin 09:48:00 -59.0 Dark Up 59.7 214.9 Up 09:33:00 - 10:03:00 8254
Niwot 09:47:13 -51.6 Dark Down 54.2 243.2 Up 09:32:13 - 10:02:13 8231
Madras/Culver 09:48:00 -59.4 Dark Up 60.2 215.4 Up 09:33:00 - 10:03:00 8203
Redmond 09:47:59 -59.7 Dark Up 60.5 215.7 Up 09:32:59 - 10:02:59 8169
Sisters 09:48:00 -59.9 Dark Up 60.6 215.0 Up 09:33:00 - 10:03:00 8162
Bend 09:47:59 -59.9 Dark Up 60.7 215.7 Up 09:32:59 - 10:02:59 8146
Oregon Observatory 09:48:00 -60.1 Dark Up 60.9 215.6 Up 09:33:00 - 10:03:00 8127
La Pine/Gilchrist 09:47:59 -60.3 Dark Up 61.1 215.7 Up 09:32:59 - 10:02:59 8107
North Lake 09:47:57 -60.2 Dark Up 61.2 217.2 Up 09:32:57 - 10:02:57 8081
Paisley 09:47:55 -60.4 Dark Up 61.5 218.5 Up 09:32:55 - 10:02:55 8039
Lakeview 09:47:53 -60.6 Dark Up 61.8 219.4 Up 09:32:53 - 10:02:53 7997
Chiloquin 09:47:59 -61.2 Dark Up 62.2 216.3 Up 09:32:59 - 10:02:59 7995
Klamath Falls 09:47:58 -61.4 Dark Up 62.4 216.8 Up 09:32:58 - 10:02:58 7965
Tulelake 09:47:55 -61.4 Dark Up 62.5 217.7 Up 09:32:55 - 10:02:55 7947
Cedarville 09:47:51 -60.9 Dark Up 62.2 220.5 Up 09:32:51 - 10:02:51 7940
Fall River/Burney 09:47:54 -61.9 Dark Up 63.2 218.9 Up 09:32:54 - 10:02:54 7863
Susanville 09:47:52 -61.9 Dark Up 63.3 221.0 Up 09:32:52 - 10:02:52 7823
Gimple 09:47:52 -62.2 Dark Up 63.6 221.0 Up 09:32:52 - 10:02:52 7791
Greenville 09:47:51 -62.2 Dark Up 63.7 220.8 Up 09:32:51 - 10:02:51 7789
Portola 09:47:49 -62.1 Dark Up 63.7 222.1 Up 09:32:49 - 10:02:49 7770
Quincy 09:47:51 -62.3 Dark Up 63.8 221.1 Up 09:32:51 - 10:02:51 7770
Reno 09:47:48 -61.9 Dark Up 63.5 223.7 Up 09:32:48 - 10:02:48 7762
Carson City 09:47:46 -62.1 Dark Up 63.8 224.2 Up 09:32:46 - 10:02:46 7728
Yerington 09:47:44 -61.7 Dark Up 63.6 225.5 Up 09:32:44 - 10:02:44 7726
Gardnerville 09:47:46 -62.2 Dark Up 63.9 224.6 Up 09:32:46 - 10:02:46 7706
Hawthorne 09:47:42 -61.6 Dark Up 63.6 227.1 Up 09:32:42 - 10:02:42 7696
Tonopah 09:47:37 -60.9 Dark Up 63.1 230.1 Up 09:32:37 - 10:02:37 7690
Lee Vining 09:47:42 -62.3 Dark Up 64.3 227.1 Up 09:32:42 - 10:02:42 7629
Beatty 09:47:33 -61.1 Dark Up 63.5 232.6 Up 09:32:33 - 10:02:33 7593
Indian Springs 09:47:29 -60.5 Dark Up 63.0 234.8 Up 09:32:29 - 10:02:29 7592
Bishop 09:47:39 -62.1 Dark Up 64.2 229.3 Up 09:32:39 - 10:02:39 7591
Henderson 09:47:27 -60.2 Dark Up 62.9 236.7 Up 09:32:27 - 10:02:27 7561
Patrick 09:47:21 -59.6 Dark Up 62.5 239.2 Up 09:32:21 - 10:02:21 7533
Lone Pine 09:47:37 -62.2 Dark Up 64.5 231.0 Up 09:32:37 - 10:02:37 7527
DCO 09:47:20 -59.2 Dark Up 62.1 240.7 Up 09:32:20 - 10:02:20 7525
Searchlight/Boulder City 09:47:25 -60.4 Dark Up 63.2 237.7 Up 09:32:25 - 10:02:25 7507
Kingman/Dolan Springs 09:47:22 -59.8 Dark Up 62.7 239.4 Up 09:32:22 - 10:02:22 7506
Laughlin/Bullhead City 09:47:23 -60.2 Dark Up 63.1 238.7 Up 09:32:23 - 10:02:23 7489
Mohave Valley 09:47:23 -60.3 Dark Up 63.2 239.1 Up 09:32:23 - 10:02:23 7463
Lake Havasu City 09:47:22 -60.3 Dark Up 63.2 240.2 Up 09:32:22 - 10:02:22 7431
Parker 09:47:21 -60.4 Dark Up 63.4 240.8 Up 09:32:21 - 10:02:21 7398
Blythe 09:47:20 -60.8 Dark Up 63.9 241.3 Up 09:32:20 - 10:02:20 7338
CPSLO 09:47:43 -64.6 Dark Up 67.0 228.7 Up 09:32:43 - 10:02:43 7328
Idyllwild 09:47:27 -62.4 Dark Up 65.3 238.1 Up 09:32:27 - 10:02:27 7286
Wildwood 09:47:34 -63.7 Dark Up 66.4 234.5 Up 09:32:34 - 10:02:34 7267
Calipatria 09:47:23 -61.6 Dark Up 64.8 240.9 Up 09:32:23 - 10:02:23 7262
Yuma 09:47:19 -61.1 Dark Up 64.3 243.0 Up 09:32:19 - 10:02:19 7246

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 09:46UT)
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 2018/06/11 19:32:30 UT

Marc W. Buie, Southwest Research Institute

RECON