RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star UC4-830-018876 with event index number of 85687

Geocentric closest approach at 2017/10/16 06:19:29 UTC

J2000 position of star is 19:46:15.4 +75:50:31
Equinox of date position of star is 19:45:46.3 +75:53:06
Stellar brightness R=16.2, use SENSEUP=128
Star is 91 degrees from the moon. Moon is 13% illuminated.
TNO apparent brightness V=20.2

[RECON map]
TNO is 11.2 AU from the Sun and 11.0 AU from the Earth.
The TNO is moving 37.8 km/sec on the sky relative to the star, or, 17.1 arcsec/hr.
The 1-sigma error in the time of the event is 26 seconds.
The 1-sigma cross-track error in the shadow position is 400 km.
The sky-plane scale is 7969.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.2 sec chord
Diameter=34.0 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2017/10/16 06:19UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:02.3 +45:20:41  1.3 31.12 118
PPM 000431     02:53:59.6 +89:20:21  2.0 14.32  81
69 Dra         19:59:05.2 +76:31:50  6.2  1.02  91
PPM 010265     19:38:38.5 +76:36:08  8.5  0.83  90
PPM 010309     19:46:58.0 +75:54:49  9.6  0.08  91
342842         19:45:45.6 +75:53:10 16.2        91
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 17.7 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 06:19:45 -46.4 Dark Down 53.3 338.4 Up 06:17:03 - 06:22:26 -5534
Tonasket 06:19:45 -46.6 Dark Down 53.1 338.6 Up 06:17:03 - 06:22:26 -5552
Okanogan 06:19:46 -46.8 Dark Down 52.8 338.7 Up 06:17:04 - 06:22:27 -5572
Brewster 06:19:46 -47.0 Dark Down 52.6 338.9 Up 06:17:05 - 06:22:28 -5586
Manson/Chelan 06:19:47 -47.0 Dark Down 52.5 339.0 Up 06:17:06 - 06:22:29 -5590
Entiat 06:19:48 -47.2 Dark Down 52.3 339.1 Up 06:17:06 - 06:22:29 -5604
Wenatchee 06:19:48 -47.4 Dark Down 52.1 339.2 Up 06:17:07 - 06:22:30 -5619
Ellensburg 06:19:49 -47.6 Dark Down 51.8 339.4 Up 06:17:08 - 06:22:31 -5642
Yakima 06:19:50 -48.0 Dark Down 51.4 339.6 Up 06:17:08 - 06:22:31 -5671
Toppenish/White Swan 06:19:49 -48.2 Dark Down 51.1 339.7 Up 06:17:08 - 06:22:31 -5692
Goldendale 06:19:51 -48.5 Dark Down 50.7 340.0 Up 06:17:09 - 06:22:32 -5717
The Dalles 06:19:52 -48.5 Dark Down 50.6 340.1 Up 06:17:10 - 06:22:33 -5720
Pasco 06:19:48 -48.8 Dark Down 50.7 339.6 Up 06:17:06 - 06:22:29 -5744
Maupin 06:19:52 -48.9 Dark Down 50.2 340.2 Up 06:17:11 - 06:22:34 -5754
George/Umatilla 06:19:49 -49.0 Dark Down 50.5 339.8 Up 06:17:07 - 06:22:30 -5761
PNWRO 06:19:47 -49.1 Dark Down 50.4 339.7 Up 06:17:06 - 06:22:29 -5769
Madras/Culver 06:19:53 -49.4 Dark Down 49.7 340.5 Up 06:17:11 - 06:22:34 -5791
Sisters 06:19:54 -49.4 Dark Down 49.5 340.6 Up 06:17:12 - 06:22:35 -5797
Redmond 06:19:53 -49.6 Dark Down 49.3 340.6 Up 06:17:12 - 06:22:35 -5814
Bend 06:19:54 -49.7 Dark Down 49.2 340.7 Up 06:17:12 - 06:22:35 -5824
Oregon Observatory 06:19:54 -49.8 Dark Down 49.0 340.8 Up 06:17:13 - 06:22:36 -5831
La Pine/Gilchrist 06:19:55 -50.0 Dark Down 48.9 340.9 Up 06:17:13 - 06:22:36 -5843
North Lake 06:19:54 -50.6 Dark Down 48.3 341.0 Up 06:17:12 - 06:22:35 -5895
Chiloquin 06:19:57 -50.7 Dark Down 47.9 341.3 Up 06:17:16 - 06:22:39 -5904
Klamath Falls 06:19:57 -51.0 Dark Down 47.5 341.4 Up 06:17:16 - 06:22:39 -5930
Paisley 06:19:54 -51.2 Dark Down 47.7 341.1 Up 06:17:13 - 06:22:36 -5945
Tulelake 06:19:57 -51.4 Dark Down 47.2 341.5 Up 06:17:16 - 06:22:39 -5959
Lakeview 06:19:54 -51.7 Dark Down 47.2 341.3 Up 06:17:13 - 06:22:36 -5986
Fall River/Burney 06:19:58 -52.1 Dark Down 46.3 341.8 Up 06:17:17 - 06:22:40 -6022
Cedarville 06:19:55 -52.3 Dark Down 46.5 341.5 Up 06:17:14 - 06:22:37 -6037
Susanville 06:19:57 -52.9 Dark Down 45.6 341.9 Up 06:17:16 - 06:22:39 -6091
Greenville 06:19:59 -53.0 Dark Down 45.4 342.0 Up 06:17:17 - 06:22:40 -6098
Gimple 06:19:58 -53.1 Dark Down 45.3 342.0 Up 06:17:17 - 06:22:40 -6101
Quincy 06:19:59 -53.2 Dark Down 45.2 342.1 Up 06:17:17 - 06:22:40 -6111
Portola 06:19:58 -53.5 Dark Down 44.9 342.1 Up 06:17:16 - 06:22:39 -6137
Reno 06:19:57 -54.0 Dark Down 44.5 342.1 Up 06:17:16 - 06:22:39 -6179
Carson City 06:19:57 -54.3 Dark Down 44.2 342.2 Up 06:17:16 - 06:22:39 -6202
Gardnerville 06:19:58 -54.5 Dark Down 43.9 342.3 Up 06:17:16 - 06:22:39 -6220
Yerington 06:19:57 -54.8 Dark Down 43.8 342.2 Up 06:17:15 - 06:22:38 -6238
Hawthorne 06:19:56 -55.4 Dark Down 43.3 342.3 Up 06:17:15 - 06:22:38 -6287
Lee Vining 06:19:58 -55.6 Dark Down 42.9 342.5 Up 06:17:16 - 06:22:39 -6305
Tonopah 06:19:54 -56.4 Dark Down 42.5 342.3 Up 06:17:12 - 06:22:35 -6367
Bishop 06:19:57 -56.4 Dark Down 42.1 342.6 Up 06:17:16 - 06:22:39 -6368
CPSLO 06:20:04 -56.9 Dark Down 40.7 343.3 Up 06:17:23 - 06:22:46 -6402
Lone Pine 06:19:57 -57.2 Dark Down 41.3 342.8 Up 06:17:16 - 06:22:39 -6426
Beatty 06:19:54 -57.6 Dark Down 41.3 342.6 Up 06:17:13 - 06:22:36 -6454
Indian Springs 06:19:52 -58.3 Dark Down 40.7 342.6 Up 06:17:11 - 06:22:34 -6511
Niwot 06:19:27 -58.3 Dark Down 41.5 341.3 Up 06:16:46 - 06:22:09 -6539
Wildwood 06:20:02 -58.9 Dark Down 39.0 343.4 Up 06:17:20 - 06:22:43 -6553
Henderson 06:19:52 -59.1 Dark Down 40.0 342.7 Up 06:17:11 - 06:22:34 -6566
Searchlight/Boulder City 06:19:52 -59.6 Dark Down 39.5 342.9 Up 06:17:11 - 06:22:34 -6603
Laughlin/Bullhead City 06:19:52 -60.0 Dark Down 39.1 342.9 Up 06:17:11 - 06:22:34 -6631
Patrick 06:19:51 -60.1 Dark Down 39.2 342.8 Up 06:17:09 - 06:22:32 -6640
Idyllwild 06:19:58 -60.2 Dark Down 38.2 343.4 Up 06:17:16 - 06:22:39 -6644
Kingman/Dolan Springs 06:19:51 -60.2 Dark Down 39.0 342.9 Up 06:17:09 - 06:22:32 -6647
Mohave Valley 06:19:52 -60.2 Dark Down 38.8 343.0 Up 06:17:11 - 06:22:34 -6648
Lake Havasu City 06:19:52 -60.7 Dark Down 38.4 343.1 Up 06:17:11 - 06:22:34 -6680
DCO 06:19:49 -60.7 Dark Down 38.7 342.8 Up 06:17:08 - 06:22:31 -6680
Parker 06:19:52 -61.0 Dark Down 38.1 343.1 Up 06:17:11 - 06:22:34 -6701
Calipatria 06:19:56 -61.2 Dark Down 37.4 343.4 Up 06:17:15 - 06:22:38 -6719
Blythe 06:19:54 -61.3 Dark Down 37.6 343.3 Up 06:17:12 - 06:22:35 -6722
Yuma 06:19:54 -62.0 Dark Down 36.8 343.5 Up 06:17:13 - 06:22:36 -6773

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, (2017/10/16 06:19UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 31.12 118
PPM 000431     02:31:52.2 +89:15:50  2.0 14.32  81
69 Dra         19:59:36.4 +76:28:52  6.2  1.02  91
PPM 010265     19:39:14.3 +76:33:39  8.5  0.83  90
PPM 010309     19:47:27.7 +75:52:08  9.6  0.08  91
342842         19:46:15.4 +75:50:31 16.2        91
Positions are for J2000

Event circumstances last updated at 2017/05/16 18:34:15 UT

Marc W. Buie, Southwest Research Institute

RECON