RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star UC4-769-054029 with event index number of 191616

Geocentric closest approach at 2019/05/09 07:42:30 UTC

J2000 position of star is 21:05:57.5 +63:45:20
Equinox of date position of star is 21:06:19.1 +63:49:41
Stellar brightness R=15.6, use SENSEUP=128
Star is 90 degrees from the moon. Moon is 21% illuminated.
TNO apparent brightness V=20.7

[RECON map]
TNO is 12.4 AU from the Sun and 12.7 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 8.8 arcsec/hr.
The 1-sigma error in the time of the event is 47 seconds.
The 1-sigma cross-track error in the shadow position is 627 km.
The sky-plane scale is 9197.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 3.7 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2019/05/09 07:42UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:05.5 +45:21:01  1.3 18.79 108
Alderamin      21:19:02.4 +62:40:05  2.4  1.84  91
PPM 022646     21:09:53.6 +63:22:30  6.4  0.60  91
PPM 022614     21:07:15.5 +63:51:25  8.3  0.10  90
342842         21:06:20.9 +63:50:01 15.6        90
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 19.3 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:44:47 -23.7 Dark Down 41.4 36.1 Up 07:40:22 - 07:49:13 -5219
Tonasket 07:44:47 -24.0 Dark Down 41.2 36.0 Up 07:40:21 - 07:49:12 -5239
Okanogan 07:44:47 -24.3 Dark Down 40.9 35.7 Up 07:40:21 - 07:49:12 -5266
Brewster 07:44:47 -24.6 Dark Down 40.6 35.6 Up 07:40:22 - 07:49:13 -5286
Manson/Chelan 07:44:48 -24.8 Dark Down 40.3 35.4 Up 07:40:23 - 07:49:14 -5297
Entiat 07:44:48 -25.0 Dark Down 40.1 35.2 Up 07:40:23 - 07:49:14 -5315
Wenatchee 07:44:49 -25.2 Dark Down 39.8 35.1 Up 07:40:24 - 07:49:15 -5335
Ellensburg 07:44:49 -25.6 Dark Down 39.4 34.8 Up 07:40:23 - 07:49:14 -5366
Yakima 07:44:49 -26.0 Dark Down 39.1 34.6 Up 07:40:23 - 07:49:14 -5401
Toppenish/White Swan 07:44:48 -26.2 Dark Down 39.0 34.6 Up 07:40:22 - 07:49:13 -5422
Pasco 07:44:45 -26.4 Dark Down 39.4 34.8 Up 07:40:19 - 07:49:10 -5455
Goldendale 07:44:49 -26.8 Dark Down 38.3 34.2 Up 07:40:24 - 07:49:15 -5460
The Dalles 07:44:50 -27.0 Dark Down 38.0 34.0 Up 07:40:25 - 07:49:16 -5472
George/Umatilla 07:44:45 -26.7 Dark Down 39.0 34.6 Up 07:40:19 - 07:49:10 -5480
PNWRO 07:44:44 -26.7 Dark Down 39.2 34.8 Up 07:40:18 - 07:49:09 -5480
Maupin 07:44:49 -27.4 Dark Down 37.7 33.9 Up 07:40:24 - 07:49:15 -5509
Madras/Culver 07:44:49 -28.0 Dark Down 37.2 33.6 Up 07:40:24 - 07:49:15 -5553
Sisters 07:44:50 -28.3 Dark Down 36.8 33.4 Up 07:40:25 - 07:49:16 -5571
Redmond 07:44:49 -28.3 Dark Down 36.9 33.5 Up 07:40:24 - 07:49:15 -5581
Bend 07:44:49 -28.5 Dark Down 36.7 33.3 Up 07:40:24 - 07:49:15 -5596
Oregon Observatory 07:44:50 -28.7 Dark Down 36.5 33.2 Up 07:40:24 - 07:49:15 -5607
La Pine/Gilchrist 07:44:50 -28.9 Dark Down 36.3 33.1 Up 07:40:24 - 07:49:15 -5622
North Lake 07:44:48 -29.3 Dark Down 36.2 33.1 Up 07:40:22 - 07:49:13 -5670
Chiloquin 07:44:51 -30.0 Dark Down 35.2 32.6 Up 07:40:25 - 07:49:16 -5703
Paisley 07:44:47 -29.9 Dark Down 35.8 33.0 Up 07:40:21 - 07:49:12 -5721
Klamath Falls 07:44:50 -30.3 Dark Down 35.0 32.5 Up 07:40:24 - 07:49:15 -5732
Tulelake 07:44:48 -30.6 Dark Down 34.8 32.5 Up 07:40:23 - 07:49:14 -5760
Lakeview 07:44:46 -30.4 Dark Down 35.5 32.8 Up 07:40:20 - 07:49:11 -5766
Cedarville 07:44:45 -31.1 Dark Down 35.0 32.6 Up 07:40:19 - 07:49:10 -5821
Fall River/Burney 07:44:48 -31.5 Dark Down 34.1 32.2 Up 07:40:22 - 07:49:13 -5833
Susanville 07:44:45 -32.2 Dark Down 33.9 32.1 Up 07:40:19 - 07:49:10 -5897
Greenville 07:44:45 -32.4 Dark Down 33.5 31.9 Up 07:40:20 - 07:49:11 -5912
Gimple 07:44:45 -32.4 Dark Down 33.6 31.9 Up 07:40:20 - 07:49:11 -5914
Quincy 07:44:45 -32.6 Dark Down 33.3 31.9 Up 07:40:19 - 07:49:10 -5928
Portola 07:44:44 -32.8 Dark Down 33.4 31.9 Up 07:40:18 - 07:49:09 -5947
Reno 07:44:41 -33.1 Dark Down 33.5 32.0 Up 07:40:16 - 07:49:07 -5981
Carson City 07:44:41 -33.4 Dark Down 33.2 31.8 Up 07:40:15 - 07:49:06 -6009
Gardnerville 07:44:41 -33.7 Dark Down 33.0 31.8 Up 07:40:15 - 07:49:06 -6028
Yerington 07:44:39 -33.7 Dark Down 33.3 31.9 Up 07:40:14 - 07:49:05 -6036
Niwot 07:43:55 -31.6 Dark Down 40.0 34.5 Up 07:39:29 - 07:48:20 -6078
Hawthorne 07:44:37 -34.1 Dark Down 33.1 31.8 Up 07:40:12 - 07:49:03 -6081
Lee Vining 07:44:37 -34.7 Dark Down 32.4 31.5 Up 07:40:12 - 07:49:03 -6114
Tonopah 07:44:31 -34.6 Dark Down 33.3 31.9 Up 07:40:06 - 07:48:57 -6141
Bishop 07:44:35 -35.3 Dark Down 32.2 31.5 Up 07:40:09 - 07:49:00 -6171
Lone Pine 07:44:33 -36.1 Dark Down 31.7 31.3 Up 07:40:08 - 07:48:59 -6233
Beatty 07:44:29 -35.8 Dark Down 32.5 31.6 Up 07:40:03 - 07:48:54 -6234
CPSLO 07:44:41 -37.3 Dark Down 29.5 30.4 Low 07:40:15 - 07:49:06 -6272
Indian Springs 07:44:25 -36.1 Dark Down 32.6 31.7 Up 07:39:59 - 07:48:50 -6275
Henderson 07:44:22 -36.6 Dark Down 32.5 31.6 Up 07:39:57 - 07:48:48 -6323
Searchlight/Boulder City 07:44:21 -37.2 Dark Down 32.0 31.4 Up 07:39:55 - 07:48:46 -6365
Patrick 07:44:16 -37.2 Dark Down 32.4 31.5 Up 07:39:51 - 07:48:42 -6383
Laughlin/Bullhead City 07:44:19 -37.5 Dark Down 31.9 31.4 Up 07:39:53 - 07:48:44 -6391
Kingman/Dolan Springs 07:44:18 -37.4 Dark Down 32.1 31.4 Up 07:39:52 - 07:48:43 -6397
Wildwood 07:44:33 -38.6 Dark Down 29.3 30.4 Low 07:40:07 - 07:48:58 -6399
Mohave Valley 07:44:19 -37.7 Dark Down 31.7 31.3 Up 07:39:53 - 07:48:44 -6411
DCO 07:44:14 -37.5 Dark Down 32.4 31.5 Up 07:39:49 - 07:48:40 -6413
Lake Havasu City 07:44:18 -38.1 Dark Down 31.4 31.2 Up 07:39:52 - 07:48:43 -6442
Idyllwild 07:44:25 -39.0 Dark Down 29.8 30.6 Low 07:40:00 - 07:48:51 -6459
Parker 07:44:18 -38.5 Dark Down 31.1 31.1 Up 07:39:52 - 07:48:43 -6467
Blythe 07:44:18 -39.0 Dark Down 30.6 30.9 Up 07:39:52 - 07:48:43 -6499
Calipatria 07:44:21 -39.5 Dark Down 29.7 30.6 Low 07:39:55 - 07:48:46 -6519
Yuma 07:44:16 -40.0 Dark Down 29.7 30.6 Low 07:39:51 - 07:48:42 -6561

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 342842, (2019/05/09 07:42UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 18.79 108
Alderamin      21:18:35.2 +62:35:09  2.4  1.84  91
PPM 022646     21:09:28.9 +63:17:45  6.4  0.60  91
PPM 022614     21:06:52.1 +63:46:42  8.3  0.10  90
342842         21:05:57.5 +63:45:20 15.6        90
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:54:48 UT

Marc W. Buie, Southwest Research Institute

RECON