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 12:07:28 UTC

J2000 position of star is 20:31:40.3 +60:18:26
Equinox of date position of star is 20:32:02.3 +60:22:07
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 1069 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=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sisters 12:04:47 -36.6 Dark Up 24.8 27.6 Low 12:02:39 - 12:06:55 5781
The Dalles 12:04:51 -36.1 Dark Up 26.1 28.1 Low 12:02:43 - 12:06:59 5775
Chiloquin 12:04:44 -37.1 Dark Up 23.2 27.2 Low 12:02:36 - 12:06:52 5774
La Pine/Gilchrist 12:04:47 -36.7 Dark Up 24.3 27.5 Low 12:02:39 - 12:06:55 5767
Oregon Observatory 12:04:47 -36.6 Dark Up 24.5 27.6 Low 12:02:39 - 12:06:55 5767
Klamath Falls 12:04:43 -37.1 Dark Up 22.9 27.1 Low 12:02:35 - 12:06:51 5762
Maupin 12:04:49 -36.1 Dark Up 25.8 28.0 Low 12:02:41 - 12:06:57 5762
Bend 12:04:47 -36.5 Dark Up 24.7 27.7 Low 12:02:39 - 12:06:55 5761
Madras/Culver 12:04:48 -36.2 Dark Up 25.3 27.9 Low 12:02:40 - 12:06:56 5757
Redmond 12:04:47 -36.3 Dark Up 24.9 27.8 Low 12:02:39 - 12:06:55 5755
Goldendale 12:04:50 -35.8 Dark Up 26.4 28.3 Low 12:02:42 - 12:06:58 5754
Ellensburg 12:04:53 -35.4 Dark Up 27.5 28.7 Low 12:02:45 - 12:07:01 5753
Yakima 12:04:52 -35.5 Dark Up 27.2 28.6 Low 12:02:44 - 12:07:00 5748
Wenatchee 12:04:54 -35.2 Dark Up 28.0 28.9 Low 12:02:46 - 12:07:02 5744
Entiat 12:04:54 -35.0 Dark Up 28.2 29.0 Low 12:02:46 - 12:07:02 5741
Manson/Chelan 12:04:54 -34.9 Dark Up 28.5 29.1 Low 12:02:46 - 12:07:02 5740
Tulelake 12:04:43 -36.9 Dark Up 22.8 27.2 Low 12:02:35 - 12:06:51 5738
Toppenish/White Swan 12:04:52 -35.4 Dark Up 27.1 28.6 Low 12:02:44 - 12:07:00 5735
North Lake 12:04:45 -36.3 Dark Up 24.1 27.7 Low 12:02:37 - 12:06:53 5721
Brewster 12:04:54 -34.7 Dark Up 28.8 29.3 Low 12:02:46 - 12:07:02 5719
Fall River/Burney 12:04:41 -37.0 Dark Up 22.0 27.0 Low 12:02:33 - 12:06:49 5716
Okanogan 12:04:55 -34.5 Dark Up 29.1 29.5 Low 12:02:47 - 12:07:03 5710
Oroville 12:04:58 -34.3 Dark Up 29.6 29.7 Low 12:02:50 - 12:07:06 5709
Tonasket 12:04:57 -34.3 Dark Up 29.4 29.6 Low 12:02:49 - 12:07:05 5705
Paisley 12:04:43 -36.1 Dark Up 23.7 27.7 Low 12:02:35 - 12:06:51 5687
Greenville 12:04:38 -36.8 Dark Up 21.3 27.0 Low 12:02:30 - 12:06:46 5668
Lakeview 12:04:42 -36.1 Dark Up 23.4 27.7 Low 12:02:34 - 12:06:50 5665
Quincy 12:04:38 -36.8 Dark Up 21.1 27.0 Low 12:02:30 - 12:06:46 5663
Gimple 12:04:38 -36.7 Dark Up 21.4 27.1 Low 12:02:30 - 12:06:46 5662
George/Umatilla 12:04:49 -34.8 Dark Up 27.0 28.9 Low 12:02:41 - 12:06:57 5661
Susanville 12:04:39 -36.5 Dark Up 21.7 27.2 Low 12:02:31 - 12:06:47 5653
Pasco 12:04:51 -34.6 Dark Up 27.4 29.1 Low 12:02:43 - 12:06:59 5652
Cedarville 12:04:40 -36.0 Dark Up 22.8 27.6 Low 12:02:32 - 12:06:48 5641
PNWRO 12:04:49 -34.4 Dark Up 27.2 29.1 Low 12:02:41 - 12:06:57 5633
Portola 12:04:37 -36.4 Dark Up 21.2 27.2 Low 12:02:29 - 12:06:45 5627
Reno 12:04:36 -36.0 Dark Up 21.2 27.4 Low 12:02:28 - 12:06:44 5576
Carson City 12:04:35 -36.0 Dark Up 20.9 27.3 Low 12:02:27 - 12:06:43 5567
Gardnerville 12:04:34 -36.0 Dark Up 20.7 27.3 Low 12:02:26 - 12:06:42 5558
CPSLO 12:04:29 -37.0 Dark Up 17.1 26.4 Really Low 12:02:21 - 12:06:37 5539
Yerington 12:04:34 -35.5 Dark Up 20.9 27.5 Low 12:02:26 - 12:06:42 5517
Lee Vining 12:04:32 -35.6 Dark Up 20.0 27.3 Low 12:02:24 - 12:06:40 5490
Hawthorne 12:04:33 -35.1 Dark Up 20.7 27.6 Low 12:02:25 - 12:06:41 5468
Bishop 12:04:30 -35.0 Dark Up 19.8 27.5 Really Low 12:02:22 - 12:06:38 5423
Lone Pine 12:04:29 -34.8 Dark Up 19.2 27.5 Really Low 12:02:21 - 12:06:37 5378
Tonopah 12:04:30 -34.1 Dark Up 20.8 28.0 Low 12:02:22 - 12:06:38 5353
Wildwood 12:04:24 -35.3 Dark Up 16.8 26.9 Really Low 12:02:16 - 12:06:32 5352
Beatty 12:04:28 -33.8 Dark Up 20.0 28.0 Really Low 12:02:20 - 12:06:36 5289
Indian Springs 12:04:26 -32.9 Dark Up 20.1 28.3 Low 12:02:18 - 12:06:34 5199
Idyllwild 12:04:22 -33.8 Dark Up 17.2 27.5 Really Low 12:02:14 - 12:06:30 5195
Henderson 12:04:24 -32.3 Dark Up 19.9 28.4 Really Low 12:02:16 - 12:06:32 5131
Searchlight/Boulder City 12:04:23 -32.3 Dark Up 19.4 28.4 Really Low 12:02:15 - 12:06:31 5109
Calipatria 12:04:19 -32.8 Dark Up 17.1 27.8 Really Low 12:02:11 - 12:06:27 5084
Laughlin/Bullhead City 12:04:21 -32.0 Dark Up 19.3 28.4 Really Low 12:02:13 - 12:06:29 5073
Mohave Valley 12:04:21 -32.0 Dark Up 19.0 28.4 Really Low 12:02:13 - 12:06:29 5064
Kingman/Dolan Springs 12:04:21 -31.6 Dark Up 19.5 28.6 Really Low 12:02:13 - 12:06:29 5034
Lake Havasu City 12:04:21 -31.8 Dark Up 18.8 28.4 Really Low 12:02:13 - 12:06:29 5033
Patrick 12:04:21 -31.4 Dark Up 19.7 28.7 Really Low 12:02:13 - 12:06:29 5026
Blythe 12:04:18 -32.0 Dark Up 17.9 28.2 Really Low 12:02:10 - 12:06:26 5026
Parker 12:04:19 -31.8 Dark Up 18.5 28.3 Really Low 12:02:11 - 12:06:27 5019
Yuma 12:04:18 -32.0 Dark Up 17.0 28.0 Really Low 12:02:10 - 12:06:26 4999
DCO 12:04:21 -30.9 Dark Up 19.8 28.9 Really Low 12:02:13 - 12:06:29 4962
Niwot 12:04:25 -24.8 Dark Up 27.3 32.5 Low 12:02:17 - 12:06:33 4524

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 2017/12/05 19:12:09 UT

Marc W. Buie, Southwest Research Institute

RECON