RECON: TNO occultation with 02WL21

Event between 02WL21 and star UC4-573-029482 with event index number of 174349

Geocentric closest approach at 2019/02/04 11:18:20 UTC

J2000 position of star is 06:27:21.9 +24:33:44
Equinox of date position of star is 06:28:25.9 +24:33:02
Stellar brightness R=14.9, use SENSEUP=128
Star is 145 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=24.2

[RECON map]
TNO is 42.0 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 19.1 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 797 seconds.
The 1-sigma cross-track error in the shadow position is 4592 km.
The sky-plane scale is 29934.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=154.9 km assuming a 5% albedo -- 8.1 sec chord
Diameter=63.2 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 02WL21, (2019/02/04 11:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:29.0 +27:58:43  1.1 17.79 162
Alhena         06:38:48.9 +16:22:53  1.9  8.51 147
PPM 095919     06:25:54.3 +25:02:13  6.3  0.77 145
PPM 095926     06:26:11.1 +24:17:25  8.5  0.59 145
PPM 095977     06:28:00.7 +24:44:28  9.7  0.23 145
PPM 096020     06:29:14.8 +24:26:46 10.2  0.19 145
02WL21         06:28:32.2 +24:32:58 14.9       146
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 1.1 sigma about the mid-time.
The median site spacing is 25.5 km RECON observability=0.3 and success probability=0.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:14:45 -40.6 Dark Down 20.3 284.5 Low 10:59:45 - 11:29:45 12022
Tonasket 11:14:44 -40.7 Dark Down 20.3 284.5 Low 10:59:44 - 11:29:44 12007
Okanogan 11:14:43 -40.9 Dark Down 20.3 284.6 Low 10:59:43 - 11:29:43 11980
Brewster 11:14:41 -41.2 Dark Down 20.4 284.5 Low 10:59:41 - 11:29:41 11956
Manson/Chelan 11:14:40 -41.5 Dark Down 20.5 284.3 Low 10:59:40 - 11:29:40 11930
Entiat 11:14:39 -41.6 Dark Down 20.5 284.4 Low 10:59:39 - 11:29:39 11913
Niwot 11:14:11 -33.2 Dark Down 7.9 295.6 Really Low 10:59:11 - 11:29:11 11893
Wenatchee 11:14:38 -41.8 Dark Down 20.5 284.4 Low 10:59:38 - 11:29:38 11893
Ellensburg 11:14:36 -42.1 Dark Down 20.6 284.4 Low 10:59:36 - 11:29:36 11857
Pasco 11:14:32 -41.5 Dark Down 19.5 285.6 Really Low 10:59:32 - 11:29:32 11851
PNWRO 11:14:32 -41.5 Dark Down 19.2 285.8 Really Low 10:59:32 - 11:29:32 11841
Yakima 11:14:34 -42.3 Dark Down 20.5 284.5 Low 10:59:34 - 11:29:34 11828
George/Umatilla 11:14:31 -41.8 Dark Down 19.5 285.5 Really Low 10:59:31 - 11:29:31 11821
Toppenish/White Swan 11:14:34 -42.3 Dark Down 20.3 284.7 Low 10:59:34 - 11:29:34 11819
Goldendale 11:14:31 -42.8 Dark Down 20.5 284.6 Low 10:59:31 - 11:29:31 11766
The Dalles 11:14:31 -43.1 Dark Down 20.7 284.4 Low 10:59:31 - 11:29:31 11738
Maupin 11:14:28 -43.2 Dark Down 20.5 284.7 Low 10:59:28 - 11:29:28 11712
Madras/Culver 11:14:26 -43.5 Dark Down 20.4 284.8 Low 10:59:26 - 11:29:26 11671
Redmond 11:14:25 -43.6 Dark Down 20.4 284.9 Low 10:59:25 - 11:29:25 11644
Sisters 11:14:25 -43.9 Dark Down 20.6 284.7 Low 10:59:25 - 11:29:25 11632
Bend 11:14:24 -43.8 Dark Down 20.4 284.9 Low 10:59:24 - 11:29:24 11623
Oregon Observatory 11:14:23 -44.0 Dark Down 20.4 284.9 Low 10:59:23 - 11:29:23 11606
La Pine/Gilchrist 11:14:23 -44.1 Dark Down 20.4 284.9 Low 10:59:23 - 11:29:23 11589
North Lake 11:14:20 -43.9 Dark Down 19.9 285.4 Really Low 10:59:20 - 11:29:20 11578
Paisley 11:14:18 -43.8 Dark Down 19.5 285.8 Really Low 10:59:18 - 11:29:18 11549
Lakeview 11:14:16 -43.9 Dark Down 19.2 286.1 Really Low 10:59:16 - 11:29:16 11518
Chiloquin 11:14:18 -44.8 Dark Down 20.4 285.1 Low 10:59:18 - 11:29:18 11494
Cedarville 11:14:13 -44.0 Dark Down 18.9 286.4 Really Low 10:59:13 - 11:29:13 11474
Klamath Falls 11:14:16 -44.8 Dark Down 20.3 285.3 Low 10:59:16 - 11:29:16 11471
Tulelake 11:14:15 -44.7 Dark Down 20.0 285.5 Really Low 10:59:15 - 11:29:15 11461
Fall River/Burney 11:14:12 -45.0 Dark Down 19.7 285.9 Really Low 10:59:12 - 11:29:12 11394
Susanville 11:14:08 -44.7 Dark Down 19.0 286.5 Really Low 10:59:08 - 11:29:08 11372
Gimple 11:14:08 -44.9 Dark Down 19.1 286.5 Really Low 10:59:08 - 11:29:08 11343
Greenville 11:14:08 -45.0 Dark Down 19.1 286.4 Really Low 10:59:08 - 11:29:08 11340
Reno 11:14:05 -44.4 Dark Down 18.1 287.3 Really Low 10:59:05 - 11:29:05 11335
Portola 11:14:05 -44.8 Dark Down 18.7 286.8 Really Low 10:59:05 - 11:29:05 11332
Quincy 11:14:07 -45.1 Dark Down 19.1 286.5 Really Low 10:59:07 - 11:29:07 11325
Yerington 11:14:03 -44.1 Dark Down 17.5 287.8 Really Low 10:59:03 - 11:29:03 11315
Tonopah 11:13:58 -42.8 Dark Down 15.8 289.1 Really Low 10:58:58 - 11:28:58 11313
Carson City 11:14:03 -44.5 Dark Down 18.0 287.4 Really Low 10:59:03 - 11:29:03 11307
Hawthorne 11:14:00 -43.8 Dark Down 17.0 288.2 Really Low 10:59:00 - 11:29:00 11298
Gardnerville 11:14:02 -44.5 Dark Down 17.9 287.5 Really Low 10:59:02 - 11:29:02 11290
Indian Springs 11:13:54 -42.0 Dark Down 14.1 290.3 Really Low 10:58:54 - 11:28:54 11253
Beatty 11:13:54 -42.8 Dark Down 15.0 289.7 Really Low 10:58:54 - 11:28:54 11238
Henderson 11:13:51 -41.6 Dark Down 13.4 290.8 Really Low 10:58:51 - 11:28:51 11236
Lee Vining 11:13:59 -44.3 Dark Down 17.2 288.1 Really Low 10:58:59 - 11:28:59 11236
DCO 11:13:49 -40.3 Dark Down 11.7 291.9 Really Low 10:58:49 - 11:28:49 11231
Patrick 11:13:50 -40.8 Dark Down 12.3 291.5 Really Low 10:58:50 - 11:28:50 11228
Bishop 11:13:56 -43.9 Dark Down 16.4 288.7 Really Low 10:58:56 - 11:28:56 11215
Kingman/Dolan Springs 11:13:48 -41.0 Dark Down 12.4 291.4 Really Low 10:58:48 - 11:28:48 11204
Searchlight/Boulder City 11:13:50 -41.6 Dark Down 13.2 290.9 Really Low 10:58:50 - 11:28:50 11193
Laughlin/Bullhead City 11:13:49 -41.4 Dark Down 12.8 291.2 Really Low 10:58:49 - 11:28:49 11182
Lone Pine 11:13:53 -43.9 Dark Down 15.9 289.1 Really Low 10:58:53 - 11:28:53 11166
Mohave Valley 11:13:47 -41.4 Dark Down 12.7 291.2 Really Low 10:58:47 - 11:28:47 11160
Lake Havasu City 11:13:46 -41.3 Dark Down 12.4 291.4 Really Low 10:58:46 - 11:28:46 11137
Parker 11:13:45 -41.3 Dark Down 12.2 291.5 Really Low 10:58:45 - 11:28:45 11110
Blythe 11:13:43 -41.7 Dark Down 12.3 291.5 Really Low 10:58:43 - 11:28:43 11056
Idyllwild 11:13:43 -43.4 Dark Down 14.0 290.4 Really Low 10:58:43 - 11:28:43 10984
Calipatria 11:13:42 -42.5 Dark Down 12.8 291.1 Really Low 10:58:42 - 11:28:42 10979
Yuma 11:13:40 -41.8 Dark Down 12.0 291.6 Really Low 10:58:40 - 11:28:40 10978
CPSLO 11:13:50 -46.2 Dark Down 17.5 288.1 Really Low 10:58:50 - 11:28:50 10962
Wildwood 11:13:45 -44.9 Dark Down 15.6 289.4 Really Low 10:58:45 - 11:28:45 10941

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 02WL21, (2019/02/04 11:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 17.79 162
Alhena         06:37:42.8 +16:23:57  1.9  8.51 147
PPM 095919     06:24:43.7 +25:02:55  6.3  0.77 145
PPM 095926     06:25:00.9 +24:18:07  8.5  0.59 145
PPM 095977     06:26:50.3 +24:45:14  9.7  0.23 145
PPM 096020     06:28:04.5 +24:27:34 10.2  0.19 145
02WL21         06:27:21.9 +24:33:44 14.9       145
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:10:09 UT

Marc W. Buie, Southwest Research Institute

RECON