RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star UC4-338-086338 with event index number of 186910

Geocentric closest approach at 2019/04/16 10:10:47 UTC

J2000 position of star is 16:50:03.8 -22:27:51
Equinox of date position of star is 16:51:06.4 -22:29:35
Stellar brightness R=15.0, use SENSEUP=128
Star is 89 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 30.3 AU from the Sun and 29.6 AU from the Earth.
The TNO is moving 12.9 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 173 seconds.
The 1-sigma cross-track error in the shadow position is 1348 km.
The sky-plane scale is 21473.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 26.9 sec chord
Diameter=141.6 km assuming a 30% albedo -- 11.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2019/04/16 10:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.6 -26:28:23  0.9  6.15  86
23Tau Sco      16:37:05.2 -28:15:16  2.8  6.58  87
PPM 266088     16:54:33.7 -20:26:46  5.7  2.19  90
PPM 266012     16:50:44.2 -21:53:05  7.4  0.62  89
PPM 266026     16:51:32.1 -22:40:10  9.7  0.19  89
470593         16:51:13.3 -22:29:47 15.0        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 11.8 km RECON observability=0.8 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)
Oroville 10:11:57 -24.0 Dark Up 17.4 165.8 Really Low 09:57:02 - 10:26:53 6731
Tonasket 10:11:57 -24.2 Dark Up 17.6 165.8 Really Low 09:57:02 - 10:26:53 6723
Okanogan 10:11:57 -24.5 Dark Up 17.9 165.6 Really Low 09:57:02 - 10:26:53 6710
Brewster 10:11:57 -24.8 Dark Up 18.2 165.4 Really Low 09:57:02 - 10:26:53 6698
Manson/Chelan 10:11:57 -25.1 Dark Up 18.3 165.0 Really Low 09:57:02 - 10:26:53 6689
Entiat 10:11:57 -25.3 Dark Up 18.5 164.9 Really Low 09:57:02 - 10:26:53 6680
Wenatchee 10:11:57 -25.6 Dark Up 18.7 164.8 Really Low 09:57:02 - 10:26:53 6670
Ellensburg 10:11:57 -26.0 Dark Up 19.1 164.6 Really Low 09:57:02 - 10:26:53 6653
Yakima 10:11:57 -26.3 Dark Up 19.5 164.5 Really Low 09:57:02 - 10:26:53 6637
Pasco 10:11:57 -26.0 Dark Up 20.1 165.9 Low 09:57:02 - 10:26:53 6630
Toppenish/White Swan 10:11:57 -26.4 Dark Up 19.7 164.6 Really Low 09:57:02 - 10:26:53 6629
PNWRO 10:11:57 -26.1 Dark Up 20.3 166.1 Low 09:57:02 - 10:26:53 6621
George/Umatilla 10:11:57 -26.4 Dark Up 20.3 165.6 Low 09:57:02 - 10:26:53 6615
Goldendale 10:11:57 -27.1 Dark Up 20.2 164.2 Low 09:57:02 - 10:26:53 6605
The Dalles 10:11:57 -27.4 Dark Up 20.3 163.8 Low 09:57:02 - 10:26:53 6594
Maupin 10:11:57 -27.7 Dark Up 20.7 163.9 Low 09:57:02 - 10:26:53 6577
Madras/Culver 10:12:20 -28.1 Dark Up 21.3 163.9 Low 09:57:25 - 10:27:16 6547
Redmond 10:12:21 -28.4 Dark Up 21.6 163.8 Low 09:57:26 - 10:27:17 6531
Sisters 10:12:23 -28.6 Dark Up 21.5 163.4 Low 09:57:27 - 10:27:18 6529
Bend 10:12:21 -28.6 Dark Up 21.8 163.6 Low 09:57:26 - 10:27:17 6521
Oregon Observatory 10:12:22 -28.8 Dark Up 21.9 163.5 Low 09:57:27 - 10:27:18 6512
La Pine/Gilchrist 10:12:23 -29.0 Dark Up 22.1 163.4 Low 09:57:28 - 10:27:19 6502
North Lake 10:12:22 -29.1 Dark Up 22.7 163.9 Low 09:57:26 - 10:27:17 6487
Paisley 10:12:20 -29.4 Dark Up 23.3 164.2 Low 09:57:24 - 10:27:15 6463
Chiloquin 10:12:27 -30.1 Dark Up 23.1 162.9 Low 09:57:31 - 10:27:22 6447
Lakeview 10:12:19 -29.7 Dark Up 23.8 164.3 Low 09:57:23 - 10:27:14 6441
Klamath Falls 10:12:27 -30.3 Dark Up 23.4 163.0 Low 09:57:32 - 10:27:23 6432
Tulelake 10:12:26 -30.4 Dark Up 23.8 163.2 Low 09:57:31 - 10:27:22 6421
Cedarville 10:12:19 -30.2 Dark Up 24.4 164.4 Low 09:57:23 - 10:27:14 6410
Niwot 10:10:46 -23.3 Dark Up 27.4 179.3 Low 09:55:51 - 10:25:42 6388
Fall River/Burney 10:12:26 -31.1 Dark Up 24.7 163.2 Low 09:57:31 - 10:27:22 6376
Susanville 10:12:24 -31.3 Dark Up 25.4 163.8 Low 09:57:28 - 10:27:19 6350
Gimple 10:12:24 -31.6 Dark Up 25.6 163.6 Low 09:57:29 - 10:27:20 6334
Greenville 10:12:26 -31.6 Dark Up 25.6 163.5 Low 09:57:30 - 10:27:21 6334
Quincy 10:12:26 -31.8 Dark Up 25.8 163.5 Low 09:57:31 - 10:27:22 6323
Portola 10:12:23 -31.6 Dark Up 26.0 163.9 Low 09:57:28 - 10:27:19 6320
Reno 10:12:20 -31.5 Dark Up 26.4 164.5 Low 09:57:25 - 10:27:16 6311
Carson City 10:12:21 -31.8 Dark Up 26.8 164.5 Low 09:57:25 - 10:27:16 6292
Yerington 10:11:57 -31.7 Dark Up 27.1 165.0 Low 09:57:02 - 10:26:53 6291
Gardnerville 10:12:21 -32.0 Dark Up 27.0 164.5 Low 09:57:25 - 10:27:16 6280
Hawthorne 10:11:57 -31.8 Dark Up 27.6 165.5 Low 09:57:02 - 10:26:53 6269
Tonopah 10:11:57 -31.4 Dark Up 28.4 166.9 Low 09:57:02 - 10:26:53 6249
Lee Vining 10:11:57 -32.4 Dark Up 28.1 164.9 Low 09:57:02 - 10:26:53 6237
Bishop 10:11:57 -32.5 Dark Up 28.8 165.6 Low 09:57:02 - 10:26:53 6206
Beatty 10:11:57 -32.0 Dark Up 29.6 167.2 Low 09:57:02 - 10:26:53 6186
Indian Springs 10:11:57 -31.6 Dark Up 30.1 168.3 Up 09:57:02 - 10:26:53 6173
Lone Pine 10:11:57 -32.9 Dark Up 29.6 165.8 Low 09:57:02 - 10:26:53 6164
Henderson 10:11:52 -31.6 Dark Up 30.7 169.0 Up 09:56:57 - 10:26:48 6145
Patrick 10:11:46 -31.4 Dark Up 31.5 170.1 Up 09:56:50 - 10:26:41 6114
Searchlight/Boulder City 10:11:53 -32.0 Dark Up 31.3 169.0 Up 09:56:57 - 10:26:48 6112
Kingman/Dolan Springs 10:11:48 -31.7 Dark Up 31.7 169.8 Up 09:56:52 - 10:26:43 6100
DCO 10:11:41 -31.2 Dark Up 31.9 170.8 Up 09:56:46 - 10:26:37 6099
Laughlin/Bullhead City 10:11:51 -32.0 Dark Up 31.6 169.3 Up 09:56:56 - 10:26:47 6096
Mohave Valley 10:11:51 -32.2 Dark Up 31.9 169.3 Up 09:56:55 - 10:26:46 6079
CPSLO 10:12:30 -35.2 Dark Up 30.3 163.1 Up 09:57:35 - 10:27:26 6065
Lake Havasu City 10:11:50 -32.3 Dark Up 32.3 169.5 Up 09:56:55 - 10:26:46 6056
Parker 10:11:50 -32.5 Dark Up 32.7 169.5 Up 09:56:54 - 10:26:45 6035
Wildwood 10:12:20 -35.0 Dark Up 31.9 165.0 Up 09:57:25 - 10:27:16 6008
Blythe 10:11:52 -33.1 Dark Up 33.1 169.1 Up 09:56:57 - 10:26:48 6001
Idyllwild 10:11:57 -34.2 Dark Up 32.7 166.8 Up 09:57:02 - 10:26:53 6000
Calipatria 10:11:57 -33.9 Dark Up 33.5 168.0 Up 09:57:02 - 10:26:53 5966
Yuma 10:11:53 -33.7 Dark Up 34.0 168.9 Up 09:56:58 - 10:26:49 5943

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 470593, (2019/04/16 10:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  6.15  86
23Tau Sco      16:35:53.0 -28:12:58  2.8  6.58  87
PPM 266088     16:53:25.2 -20:24:57  5.7  2.19  90
PPM 266012     16:49:35.0 -21:51:09  7.4  0.62  89
PPM 266026     16:50:22.6 -22:38:15  9.7  0.19  89
470593         16:50:03.8 -22:27:51 15.0        89
Positions are for J2000

Event circumstances last updated at 2017/05/21 16:37:37 UT

Marc W. Buie, Southwest Research Institute

RECON