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 07:42:21 UTC

J2000 position of star is 21:05:57.5 +63:45:20
Equinox of date position of star is 21:06:18.5 +63:49:33
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 623 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     21:09:53.5 +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 19.4 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 07:44:39 -23.7 Dark Down 41.4 36.1 Up 07:40:16 - 07:49:02 -5271
Tonasket 07:44:38 -24.0 Dark Down 41.2 36.0 Up 07:40:15 - 07:49:01 -5291
Okanogan 07:44:38 -24.3 Dark Down 40.9 35.7 Up 07:40:15 - 07:49:01 -5318
Brewster 07:44:39 -24.6 Dark Down 40.6 35.5 Up 07:40:16 - 07:49:02 -5338
Manson/Chelan 07:44:40 -24.7 Dark Down 40.3 35.3 Up 07:40:17 - 07:49:03 -5350
Entiat 07:44:39 -25.0 Dark Down 40.1 35.2 Up 07:40:16 - 07:49:02 -5368
Wenatchee 07:44:41 -25.2 Dark Down 39.8 35.1 Up 07:40:18 - 07:49:04 -5388
Ellensburg 07:44:41 -25.6 Dark Down 39.4 34.8 Up 07:40:18 - 07:49:04 -5419
Yakima 07:44:40 -26.0 Dark Down 39.1 34.6 Up 07:40:17 - 07:49:03 -5453
Toppenish/White Swan 07:44:40 -26.2 Dark Down 38.9 34.6 Up 07:40:17 - 07:49:03 -5475
Pasco 07:44:36 -26.4 Dark Down 39.3 34.8 Up 07:40:13 - 07:48:59 -5507
Goldendale 07:44:40 -26.8 Dark Down 38.3 34.2 Up 07:40:17 - 07:49:03 -5513
The Dalles 07:44:41 -27.0 Dark Down 38.0 34.0 Up 07:40:18 - 07:49:04 -5525
George/Umatilla 07:44:36 -26.7 Dark Down 39.0 34.6 Up 07:40:13 - 07:48:59 -5532
PNWRO 07:44:35 -26.7 Dark Down 39.2 34.8 Up 07:40:12 - 07:48:58 -5532
Maupin 07:44:41 -27.4 Dark Down 37.7 33.9 Up 07:40:18 - 07:49:04 -5562
Madras/Culver 07:44:41 -28.0 Dark Down 37.2 33.6 Up 07:40:18 - 07:49:04 -5606
Sisters 07:44:42 -28.3 Dark Down 36.8 33.4 Up 07:40:19 - 07:49:05 -5625
Redmond 07:44:41 -28.3 Dark Down 36.9 33.4 Up 07:40:18 - 07:49:04 -5635
Bend 07:44:41 -28.5 Dark Down 36.7 33.3 Up 07:40:18 - 07:49:04 -5649
Oregon Observatory 07:44:42 -28.7 Dark Down 36.5 33.2 Up 07:40:19 - 07:49:05 -5661
La Pine/Gilchrist 07:44:41 -28.9 Dark Down 36.3 33.1 Up 07:40:18 - 07:49:04 -5676
North Lake 07:44:39 -29.3 Dark Down 36.1 33.1 Up 07:40:16 - 07:49:02 -5724
Chiloquin 07:44:42 -30.0 Dark Down 35.2 32.6 Up 07:40:19 - 07:49:05 -5758
Paisley 07:44:38 -29.9 Dark Down 35.8 33.0 Up 07:40:15 - 07:49:01 -5775
Klamath Falls 07:44:41 -30.3 Dark Down 34.9 32.5 Up 07:40:18 - 07:49:04 -5787
Tulelake 07:44:40 -30.6 Dark Down 34.8 32.5 Up 07:40:17 - 07:49:03 -5814
Lakeview 07:44:37 -30.4 Dark Down 35.5 32.8 Up 07:40:14 - 07:49:00 -5819
Cedarville 07:44:36 -31.1 Dark Down 35.0 32.6 Up 07:40:13 - 07:48:59 -5875
Fall River/Burney 07:44:40 -31.5 Dark Down 34.1 32.1 Up 07:40:17 - 07:49:03 -5887
Susanville 07:44:37 -32.2 Dark Down 33.9 32.1 Up 07:40:14 - 07:49:00 -5951
Greenville 07:44:37 -32.4 Dark Down 33.5 31.9 Up 07:40:14 - 07:49:00 -5966
Gimple 07:44:37 -32.4 Dark Down 33.5 31.9 Up 07:40:14 - 07:49:00 -5968
Quincy 07:44:37 -32.6 Dark Down 33.3 31.8 Up 07:40:14 - 07:49:00 -5982
Portola 07:44:35 -32.8 Dark Down 33.4 31.9 Up 07:40:12 - 07:48:58 -6002
Reno 07:44:33 -33.1 Dark Down 33.5 31.9 Up 07:40:10 - 07:48:56 -6035
Carson City 07:44:33 -33.4 Dark Down 33.2 31.8 Up 07:40:10 - 07:48:56 -6063
Gardnerville 07:44:33 -33.7 Dark Down 33.0 31.8 Up 07:40:10 - 07:48:56 -6082
Yerington 07:44:30 -33.7 Dark Down 33.2 31.9 Up 07:40:07 - 07:48:53 -6090
Niwot 07:43:46 -31.6 Dark Down 40.0 34.5 Up 07:39:23 - 07:48:09 -6127
Hawthorne 07:44:28 -34.1 Dark Down 33.1 31.8 Up 07:40:05 - 07:48:51 -6134
Lee Vining 07:44:29 -34.7 Dark Down 32.4 31.5 Up 07:40:06 - 07:48:52 -6168
Tonopah 07:44:23 -34.6 Dark Down 33.2 31.9 Up 07:40:00 - 07:48:46 -6194
Bishop 07:44:26 -35.3 Dark Down 32.2 31.5 Up 07:40:03 - 07:48:49 -6225
Lone Pine 07:44:24 -36.1 Dark Down 31.7 31.3 Up 07:40:01 - 07:48:47 -6286
Beatty 07:44:20 -35.8 Dark Down 32.4 31.6 Up 07:39:57 - 07:48:43 -6287
CPSLO 07:44:31 -37.3 Dark Down 29.5 30.4 Low 07:40:08 - 07:48:54 -6325
Indian Springs 07:44:16 -36.1 Dark Down 32.6 31.7 Up 07:39:53 - 07:48:39 -6327
Henderson 07:44:13 -36.6 Dark Down 32.5 31.6 Up 07:39:50 - 07:48:36 -6375
Searchlight/Boulder City 07:44:12 -37.2 Dark Down 32.0 31.4 Up 07:39:49 - 07:48:35 -6418
Patrick 07:44:08 -37.2 Dark Down 32.4 31.5 Up 07:39:45 - 07:48:31 -6435
Laughlin/Bullhead City 07:44:10 -37.5 Dark Down 31.9 31.4 Up 07:39:47 - 07:48:33 -6443
Kingman/Dolan Springs 07:44:08 -37.4 Dark Down 32.1 31.4 Up 07:39:45 - 07:48:31 -6448
Wildwood 07:44:23 -38.6 Dark Down 29.3 30.4 Low 07:40:00 - 07:48:46 -6453
Mohave Valley 07:44:10 -37.7 Dark Down 31.6 31.3 Up 07:39:47 - 07:48:33 -6462
DCO 07:44:05 -37.5 Dark Down 32.4 31.5 Up 07:39:42 - 07:48:28 -6465
Lake Havasu City 07:44:08 -38.1 Dark Down 31.4 31.2 Up 07:39:45 - 07:48:31 -6493
Idyllwild 07:44:16 -39.0 Dark Down 29.7 30.6 Low 07:39:53 - 07:48:39 -6512
Parker 07:44:08 -38.5 Dark Down 31.1 31.1 Up 07:39:45 - 07:48:31 -6518
Blythe 07:44:08 -39.0 Dark Down 30.5 30.9 Up 07:39:45 - 07:48:31 -6551
Calipatria 07:44:11 -39.6 Dark Down 29.7 30.6 Low 07:39:48 - 07:48:34 -6571
Yuma 07:44:07 -40.0 Dark Down 29.7 30.6 Low 07:39:44 - 07:48:30 -6613

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 2017/06/01 18:10:15 UT

Marc W. Buie, Southwest Research Institute

RECON