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 10:10:48 UTC

J2000 position of star is 16:50:03.8 -22:27:51
Equinox of date position of star is 16:51:08.4 -22:29:39
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 181 seconds.
The 1-sigma cross-track error in the shadow position is 1379 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 12.7 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 09:56:57 - 10:26:57 6729
Tonasket 10:11:57 -24.2 Dark Up 17.6 165.8 Really Low 09:56:57 - 10:26:57 6721
Okanogan 10:11:57 -24.5 Dark Up 17.9 165.6 Really Low 09:56:57 - 10:26:57 6708
Brewster 10:11:57 -24.8 Dark Up 18.2 165.4 Really Low 09:56:57 - 10:26:57 6697
Manson/Chelan 10:11:57 -25.1 Dark Up 18.3 165.0 Really Low 09:56:57 - 10:26:57 6687
Entiat 10:11:57 -25.3 Dark Up 18.5 164.9 Really Low 09:56:57 - 10:26:57 6679
Wenatchee 10:11:57 -25.6 Dark Up 18.7 164.8 Really Low 09:56:57 - 10:26:57 6669
Ellensburg 10:11:57 -26.0 Dark Up 19.1 164.6 Really Low 09:56:57 - 10:26:57 6652
Yakima 10:11:57 -26.3 Dark Up 19.5 164.5 Really Low 09:56:57 - 10:26:57 6635
Pasco 10:11:57 -26.0 Dark Up 20.1 165.9 Low 09:56:57 - 10:26:57 6629
Toppenish/White Swan 10:11:57 -26.4 Dark Up 19.7 164.6 Really Low 09:56:57 - 10:26:57 6628
PNWRO 10:11:57 -26.1 Dark Up 20.3 166.1 Low 09:56:57 - 10:26:57 6620
George/Umatilla 10:11:57 -26.4 Dark Up 20.3 165.6 Low 09:56:57 - 10:26:57 6614
Goldendale 10:11:57 -27.1 Dark Up 20.2 164.2 Low 09:56:57 - 10:26:57 6603
The Dalles 10:12:19 -27.4 Dark Up 20.3 163.9 Low 09:57:19 - 10:27:19 6586
Maupin 10:12:20 -27.6 Dark Up 20.8 164.0 Low 09:57:20 - 10:27:20 6569
Madras/Culver 10:12:21 -28.1 Dark Up 21.3 163.9 Low 09:57:21 - 10:27:21 6544
Redmond 10:12:23 -28.4 Dark Up 21.6 163.8 Low 09:57:23 - 10:27:23 6528
Sisters 10:12:24 -28.6 Dark Up 21.5 163.4 Low 09:57:24 - 10:27:24 6526
Bend 10:12:24 -28.6 Dark Up 21.8 163.6 Low 09:57:24 - 10:27:24 6518
Oregon Observatory 10:12:25 -28.8 Dark Up 21.9 163.5 Low 09:57:25 - 10:27:25 6509
La Pine/Gilchrist 10:12:25 -29.0 Dark Up 22.1 163.4 Low 09:57:25 - 10:27:25 6499
North Lake 10:12:22 -29.1 Dark Up 22.7 163.9 Low 09:57:22 - 10:27:22 6483
Paisley 10:12:22 -29.4 Dark Up 23.3 164.2 Low 09:57:22 - 10:27:22 6460
Chiloquin 10:12:29 -30.1 Dark Up 23.1 162.9 Low 09:57:29 - 10:27:29 6444
Lakeview 10:12:20 -29.7 Dark Up 23.8 164.3 Low 09:57:20 - 10:27:20 6437
Klamath Falls 10:12:29 -30.3 Dark Up 23.5 163.0 Low 09:57:29 - 10:27:29 6428
Tulelake 10:12:28 -30.4 Dark Up 23.8 163.2 Low 09:57:28 - 10:27:28 6418
Cedarville 10:12:20 -30.2 Dark Up 24.4 164.4 Low 09:57:20 - 10:27:20 6407
Niwot 10:10:47 -23.3 Dark Up 27.4 179.3 Low 09:55:47 - 10:25:47 6386
Fall River/Burney 10:12:29 -31.1 Dark Up 24.7 163.2 Low 09:57:29 - 10:27:29 6373
Susanville 10:12:25 -31.2 Dark Up 25.4 163.8 Low 09:57:25 - 10:27:25 6347
Gimple 10:12:27 -31.6 Dark Up 25.6 163.6 Low 09:57:27 - 10:27:27 6331
Greenville 10:12:28 -31.6 Dark Up 25.6 163.5 Low 09:57:28 - 10:27:28 6330
Quincy 10:12:28 -31.8 Dark Up 25.8 163.5 Low 09:57:28 - 10:27:28 6320
Portola 10:12:25 -31.6 Dark Up 26.0 163.9 Low 09:57:25 - 10:27:25 6317
Reno 10:12:21 -31.5 Dark Up 26.4 164.5 Low 09:57:21 - 10:27:21 6308
Yerington 10:11:57 -31.7 Dark Up 27.1 165.0 Low 09:56:57 - 10:26:57 6289
Carson City 10:12:22 -31.8 Dark Up 26.8 164.5 Low 09:57:22 - 10:27:22 6289
Gardnerville 10:12:22 -32.0 Dark Up 27.0 164.5 Low 09:57:22 - 10:27:22 6276
Hawthorne 10:11:57 -31.8 Dark Up 27.6 165.5 Low 09:56:57 - 10:26:57 6267
Tonopah 10:11:57 -31.4 Dark Up 28.4 166.9 Low 09:56:57 - 10:26:57 6247
Lee Vining 10:12:19 -32.4 Dark Up 28.1 165.0 Low 09:57:19 - 10:27:19 6227
Bishop 10:11:57 -32.5 Dark Up 28.8 165.6 Low 09:56:57 - 10:26:57 6204
Beatty 10:11:57 -32.0 Dark Up 29.6 167.2 Low 09:56:57 - 10:26:57 6184
Indian Springs 10:11:57 -31.6 Dark Up 30.1 168.3 Up 09:56:57 - 10:26:57 6171
Lone Pine 10:11:57 -32.9 Dark Up 29.6 165.8 Low 09:56:57 - 10:26:57 6162
Henderson 10:11:55 -31.6 Dark Up 30.7 169.0 Up 09:56:55 - 10:26:55 6143
Patrick 10:11:48 -31.4 Dark Up 31.5 170.1 Up 09:56:48 - 10:26:48 6112
Searchlight/Boulder City 10:11:54 -32.0 Dark Up 31.3 169.0 Up 09:56:54 - 10:26:54 6110
Kingman/Dolan Springs 10:11:49 -31.7 Dark Up 31.7 169.8 Up 09:56:49 - 10:26:49 6098
DCO 10:11:44 -31.2 Dark Up 31.9 170.8 Up 09:56:44 - 10:26:44 6097
Laughlin/Bullhead City 10:11:52 -32.0 Dark Up 31.6 169.3 Up 09:56:52 - 10:26:52 6094
Mohave Valley 10:11:54 -32.2 Dark Up 31.9 169.3 Up 09:56:54 - 10:26:54 6078
CPSLO 10:12:34 -35.2 Dark Up 30.3 163.1 Up 09:57:34 - 10:27:34 6063
Lake Havasu City 10:11:52 -32.3 Dark Up 32.3 169.5 Up 09:56:52 - 10:26:52 6055
Parker 10:11:52 -32.5 Dark Up 32.7 169.5 Up 09:56:52 - 10:26:52 6034
Wildwood 10:12:22 -35.0 Dark Up 31.9 165.0 Up 09:57:22 - 10:27:22 6005
Blythe 10:11:54 -33.0 Dark Up 33.1 169.1 Up 09:56:54 - 10:26:54 6000
Idyllwild 10:11:57 -34.2 Dark Up 32.7 166.8 Up 09:56:57 - 10:26:57 5997
Calipatria 10:11:57 -33.9 Dark Up 33.5 168.0 Up 09:56:57 - 10:26:57 5965
Yuma 10:11:55 -33.7 Dark Up 34.0 169.0 Up 09:56:55 - 10:26:55 5942

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 2017/12/06 18:51:34 UT

Marc W. Buie, Southwest Research Institute

RECON