RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star UC4-752-062523 with event index number of 177612

Geocentric closest approach at 2019/01/27 12:07:29 UTC

J2000 position of star is 20:31:40.3 +60:18:26
Equinox of date position of star is 20:32:01.6 +60:22:00
Stellar brightness R=13.8, use SENSEUP=64
Star is 99 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=20.6

[RECON map]
TNO is 12.2 AU from the Sun and 12.4 AU from the Earth.
The TNO is moving 28.2 km/sec on the sky relative to the star, or, 11.3 arcsec/hr.
The 1-sigma error in the time of the event is 20 seconds.
The 1-sigma cross-track error in the shadow position is 1074 km.
The sky-plane scale is 8983.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 3.0 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2019/01/27 12:07UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:05.0 +45:20:57  1.3 15.10 101
Alderamin      21:19:02.0 +62:40:00  2.4  6.04 105
PPM 022320     20:40:42.0 +60:34:29  6.4  1.08 100
PPM 022236     20:32:27.6 +60:29:14  7.4  0.12  99
342842         20:32:03.7 +60:22:21 13.8        99
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 4.1 km RECON observability=0.7 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sisters 12:04:49 -36.6 Dark Up 24.8 27.6 Low 12:02:41 - 12:06:57 5572
The Dalles 12:04:51 -36.1 Dark Up 26.1 28.1 Low 12:02:43 - 12:06:59 5566
Chiloquin 12:04:46 -37.1 Dark Up 23.2 27.2 Low 12:02:38 - 12:06:54 5564
La Pine/Gilchrist 12:04:47 -36.7 Dark Up 24.3 27.5 Low 12:02:39 - 12:06:55 5559
Oregon Observatory 12:04:47 -36.6 Dark Up 24.5 27.6 Low 12:02:39 - 12:06:55 5558
Klamath Falls 12:04:45 -37.1 Dark Up 22.9 27.1 Low 12:02:37 - 12:06:53 5553
Maupin 12:04:50 -36.1 Dark Up 25.8 28.0 Low 12:02:42 - 12:06:58 5553
Bend 12:04:49 -36.5 Dark Up 24.7 27.7 Low 12:02:41 - 12:06:57 5552
Madras/Culver 12:04:49 -36.2 Dark Up 25.3 27.9 Low 12:02:41 - 12:06:57 5548
Redmond 12:04:49 -36.3 Dark Up 24.9 27.8 Low 12:02:41 - 12:06:57 5546
Goldendale 12:04:51 -35.8 Dark Up 26.4 28.3 Low 12:02:43 - 12:06:59 5545
Ellensburg 12:04:53 -35.4 Dark Up 27.5 28.7 Low 12:02:45 - 12:07:01 5544
Yakima 12:04:52 -35.5 Dark Up 27.2 28.6 Low 12:02:44 - 12:07:00 5540
Wenatchee 12:04:54 -35.2 Dark Up 28.0 28.9 Low 12:02:46 - 12:07:02 5536
Entiat 12:04:55 -35.0 Dark Up 28.2 29.0 Low 12:02:47 - 12:07:03 5533
Manson/Chelan 12:04:55 -34.9 Dark Up 28.5 29.1 Low 12:02:47 - 12:07:03 5531
Tulelake 12:04:43 -36.9 Dark Up 22.8 27.2 Low 12:02:35 - 12:06:51 5528
Toppenish/White Swan 12:04:52 -35.4 Dark Up 27.1 28.6 Low 12:02:44 - 12:07:00 5526
North Lake 12:04:46 -36.3 Dark Up 24.1 27.7 Low 12:02:38 - 12:06:54 5511
Brewster 12:04:56 -34.7 Dark Up 28.8 29.3 Low 12:02:48 - 12:07:04 5511
Fall River/Burney 12:04:42 -37.0 Dark Up 22.0 27.0 Low 12:02:34 - 12:06:50 5506
Okanogan 12:04:56 -34.5 Dark Up 29.1 29.5 Low 12:02:48 - 12:07:04 5502
Oroville 12:04:58 -34.3 Dark Up 29.6 29.7 Low 12:02:50 - 12:07:06 5501
Tonasket 12:04:57 -34.3 Dark Up 29.4 29.6 Low 12:02:49 - 12:07:05 5497
Paisley 12:04:45 -36.1 Dark Up 23.7 27.7 Low 12:02:37 - 12:06:53 5478
Greenville 12:04:39 -36.8 Dark Up 21.3 27.0 Low 12:02:31 - 12:06:47 5458
Lakeview 12:04:43 -36.1 Dark Up 23.4 27.7 Low 12:02:35 - 12:06:51 5456
Quincy 12:04:39 -36.8 Dark Up 21.1 27.0 Low 12:02:31 - 12:06:47 5453
George/Umatilla 12:04:50 -34.8 Dark Up 27.0 28.9 Low 12:02:42 - 12:06:58 5452
Gimple 12:04:39 -36.7 Dark Up 21.4 27.1 Low 12:02:31 - 12:06:47 5452
Pasco 12:04:51 -34.6 Dark Up 27.4 29.1 Low 12:02:43 - 12:06:59 5443
Susanville 12:04:39 -36.5 Dark Up 21.7 27.2 Low 12:02:31 - 12:06:47 5442
Cedarville 12:04:42 -36.0 Dark Up 22.8 27.6 Low 12:02:34 - 12:06:50 5431
PNWRO 12:04:50 -34.4 Dark Up 27.2 29.1 Low 12:02:42 - 12:06:58 5425
Portola 12:04:38 -36.4 Dark Up 21.2 27.2 Low 12:02:30 - 12:06:46 5417
Reno 12:04:37 -36.0 Dark Up 21.2 27.4 Low 12:02:29 - 12:06:45 5365
Carson City 12:04:36 -36.0 Dark Up 20.9 27.3 Low 12:02:28 - 12:06:44 5356
Gardnerville 12:04:35 -36.0 Dark Up 20.7 27.3 Low 12:02:27 - 12:06:43 5347
CPSLO 12:04:29 -37.0 Dark Up 17.1 26.4 Really Low 12:02:21 - 12:06:37 5327
Yerington 12:04:35 -35.5 Dark Up 20.9 27.5 Low 12:02:27 - 12:06:43 5306
Lee Vining 12:04:32 -35.6 Dark Up 20.0 27.3 Low 12:02:24 - 12:06:40 5280
Hawthorne 12:04:34 -35.1 Dark Up 20.7 27.6 Low 12:02:26 - 12:06:42 5257
Bishop 12:04:30 -35.0 Dark Up 19.8 27.5 Really Low 12:02:22 - 12:06:38 5211
Lone Pine 12:04:29 -34.8 Dark Up 19.2 27.5 Really Low 12:02:21 - 12:06:37 5167
Tonopah 12:04:30 -34.1 Dark Up 20.8 28.0 Low 12:02:22 - 12:06:38 5142
Wildwood 12:04:25 -35.3 Dark Up 16.8 26.9 Really Low 12:02:17 - 12:06:33 5139
Beatty 12:04:29 -33.8 Dark Up 20.0 28.0 Really Low 12:02:21 - 12:06:37 5077
Indian Springs 12:04:26 -32.9 Dark Up 20.1 28.3 Low 12:02:18 - 12:06:34 4987
Idyllwild 12:04:22 -33.8 Dark Up 17.2 27.5 Really Low 12:02:14 - 12:06:30 4983
Henderson 12:04:25 -32.3 Dark Up 19.9 28.4 Really Low 12:02:17 - 12:06:33 4918
Searchlight/Boulder City 12:04:24 -32.3 Dark Up 19.4 28.4 Really Low 12:02:16 - 12:06:32 4897
Calipatria 12:04:20 -32.8 Dark Up 17.1 27.8 Really Low 12:02:12 - 12:06:28 4871
Laughlin/Bullhead City 12:04:23 -32.0 Dark Up 19.3 28.4 Really Low 12:02:15 - 12:06:31 4860
Mohave Valley 12:04:22 -32.0 Dark Up 19.0 28.4 Really Low 12:02:14 - 12:06:30 4851
Kingman/Dolan Springs 12:04:22 -31.6 Dark Up 19.5 28.6 Really Low 12:02:14 - 12:06:30 4821
Lake Havasu City 12:04:22 -31.8 Dark Up 18.8 28.4 Really Low 12:02:14 - 12:06:30 4820
Patrick 12:04:22 -31.4 Dark Up 19.7 28.7 Really Low 12:02:14 - 12:06:30 4813
Blythe 12:04:20 -32.0 Dark Up 17.9 28.2 Really Low 12:02:12 - 12:06:28 4813
Parker 12:04:21 -31.8 Dark Up 18.5 28.3 Really Low 12:02:13 - 12:06:29 4806
Yuma 12:04:18 -32.0 Dark Up 17.0 28.0 Really Low 12:02:10 - 12:06:26 4786
DCO 12:04:22 -30.9 Dark Up 19.8 28.9 Really Low 12:02:14 - 12:06:30 4749
Niwot 12:04:27 -24.8 Dark Up 27.3 32.5 Low 12:02:19 - 12:06:35 4312

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, (2019/01/27 12:07UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 15.10 101
Alderamin      21:18:35.2 +62:35:09  2.4  6.04 105
PPM 022320     20:40:17.9 +60:30:22  6.4  1.08 100
PPM 022236     20:32:04.4 +60:25:19  7.4  0.12  99
342842         20:31:40.3 +60:18:26 13.8        99
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:09:19 UT

Marc W. Buie, Southwest Research Institute

RECON