RECON: TNO occultation with 471318

Event between (471318) 11JF31 and star UC4-352-073621 with event index number of 186391

Geocentric closest approach at 2019/05/04 06:49:19 UTC

J2000 position of star is 15:36:16.9 -19:42:18
Equinox of date position of star is 15:37:19.1 -19:45:48
Stellar brightness R=16.4, use SENSEUP=128
Star is 159 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 42.4 AU from the Sun and 41.4 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 359 seconds.
The 1-sigma cross-track error in the shadow position is 4586 km.
The sky-plane scale is 30046.9 km/arcsec.

The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 22.2 sec chord
Diameter=224.4 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 471318, (2019/05/04 06:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.8 -26:28:24  0.9 13.94 145
7Del Sco       16:01:28.8 -22:40:31  2.3  6.32 152
41 Lib         15:40:01.6 -19:21:51  5.3  0.74 158
PPM 230514     15:39:32.2 -19:58:33  7.1  0.54 158
PPM 230472     15:37:43.2 -19:52:49  9.9  0.14 158
471318         15:37:23.9 -19:46:05 16.4       158
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 2.5 sigma about the mid-time.
The median site spacing is 9.3 km RECON observability=0.7 and success probability=5.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:51:49 -23.7 Dark Down 16.8 151.8 Really Low 06:36:49 - 07:06:49 879
Tonasket 06:51:49 -23.9 Dark Down 17.0 151.8 Really Low 06:36:49 - 07:06:49 866
Okanogan 06:51:50 -24.2 Dark Down 17.2 151.6 Really Low 06:36:50 - 07:06:50 843
Niwot 06:51:16 -34.0 Dark Down 28.7 164.4 Low 06:36:16 - 07:06:16 835
Brewster 06:51:51 -24.4 Dark Down 17.4 151.4 Really Low 06:36:51 - 07:06:51 822
Manson/Chelan 06:51:52 -24.6 Dark Down 17.5 151.0 Really Low 06:36:52 - 07:06:52 798
Entiat 06:51:52 -24.7 Dark Down 17.6 150.9 Really Low 06:36:52 - 07:06:52 784
Wenatchee 06:51:53 -25.0 Dark Down 17.8 150.8 Really Low 06:36:53 - 07:06:53 766
Pasco 06:51:51 -26.3 Dark Down 19.2 151.7 Really Low 06:36:51 - 07:06:51 739
Ellensburg 06:51:54 -25.3 Dark Down 18.1 150.5 Really Low 06:36:54 - 07:06:54 735
PNWRO 06:51:51 -26.6 Dark Down 19.5 151.9 Really Low 06:36:51 - 07:06:51 732
George/Umatilla 06:51:52 -26.6 Dark Down 19.5 151.5 Really Low 06:36:52 - 07:06:52 712
Yakima 06:51:54 -25.7 Dark Down 18.5 150.5 Really Low 06:36:54 - 07:06:54 711
Toppenish/White Swan 06:51:54 -25.9 Dark Down 18.7 150.6 Really Low 06:36:54 - 07:06:54 704
Goldendale 06:51:56 -26.4 Dark Down 19.0 150.1 Really Low 06:36:56 - 07:06:56 657
The Dalles 06:51:57 -26.5 Dark Down 19.1 149.7 Really Low 06:36:57 - 07:06:57 632
Maupin 06:51:57 -26.9 Dark Down 19.5 149.8 Really Low 06:36:57 - 07:06:57 610
Madras/Culver 06:51:57 -27.4 Dark Down 20.0 149.6 Really Low 06:36:57 - 07:06:57 575
Redmond 06:51:58 -27.8 Dark Down 20.3 149.5 Low 06:36:58 - 07:06:58 551
Sisters 06:51:59 -27.7 Dark Down 20.1 149.1 Low 06:36:59 - 07:06:59 539
Bend 06:51:58 -27.9 Dark Down 20.4 149.3 Low 06:36:58 - 07:06:58 533
Oregon Observatory 06:51:59 -28.1 Dark Down 20.5 149.2 Low 06:36:59 - 07:06:59 518
La Pine/Gilchrist 06:51:59 -28.3 Dark Down 20.6 149.1 Low 06:36:59 - 07:06:59 503
North Lake 06:51:58 -28.8 Dark Down 21.2 149.6 Low 06:36:58 - 07:06:58 497
Paisley 06:51:57 -29.4 Dark Down 21.8 149.8 Low 06:36:57 - 07:06:57 474
Lakeview 06:51:57 -29.9 Dark Down 22.4 149.9 Low 06:36:57 - 07:06:57 448
Chiloquin 06:52:01 -29.2 Dark Down 21.5 148.5 Low 06:37:01 - 07:07:01 420
Cedarville 06:51:57 -30.6 Dark Down 23.0 149.9 Low 06:36:57 - 07:06:57 412
Klamath Falls 06:52:01 -29.6 Dark Down 21.8 148.6 Low 06:37:01 - 07:07:01 400
Tulelake 06:52:00 -29.9 Dark Down 22.1 148.8 Low 06:37:00 - 07:07:00 394
Fall River/Burney 06:52:01 -30.8 Dark Down 22.9 148.7 Low 06:37:01 - 07:07:01 337
Susanville 06:52:00 -31.5 Dark Down 23.8 149.2 Low 06:37:00 - 07:07:00 322
Gimple 06:52:00 -31.8 Dark Down 23.9 148.9 Low 06:37:00 - 07:07:00 295
Reno 06:51:58 -32.6 Dark Down 24.8 149.8 Low 06:36:58 - 07:06:58 294
Greenville 06:52:00 -31.7 Dark Down 23.9 148.9 Low 06:37:00 - 07:07:00 292
Tonopah 06:51:51 -34.6 Dark Down 27.1 151.9 Low 06:36:51 - 07:06:51 288
Portola 06:51:59 -32.2 Dark Down 24.4 149.2 Low 06:36:59 - 07:06:59 288
Yerington 06:51:56 -33.3 Dark Down 25.6 150.3 Low 06:36:56 - 07:06:56 280
Quincy 06:52:00 -31.9 Dark Down 24.1 148.8 Low 06:37:00 - 07:07:00 279
Carson City 06:51:58 -32.9 Dark Down 25.2 149.7 Low 06:36:58 - 07:06:58 270
Hawthorne 06:51:55 -33.8 Dark Down 26.2 150.7 Low 06:36:55 - 07:06:55 268
Gardnerville 06:51:58 -33.2 Dark Down 25.4 149.7 Low 06:36:58 - 07:06:58 255
Indian Springs 06:51:47 -36.3 Dark Down 29.0 153.0 Low 06:36:47 - 07:06:47 243
DCO 06:51:40 -38.2 Dark Down 31.2 155.2 Up 06:36:40 - 07:06:40 234
Henderson 06:51:45 -37.0 Dark Down 29.7 153.6 Low 06:36:45 - 07:06:45 231
Patrick 06:51:42 -37.8 Dark Down 30.7 154.5 Up 06:36:42 - 07:06:42 229
Beatty 06:51:50 -35.8 Dark Down 28.3 152.1 Low 06:36:50 - 07:06:50 225
Lee Vining 06:51:56 -34.2 Dark Down 26.5 150.1 Low 06:36:56 - 07:06:56 211
Kingman/Dolan Springs 06:51:43 -38.0 Dark Down 30.8 154.3 Up 06:36:43 - 07:06:43 207
Bishop 06:51:55 -35.0 Dark Down 27.3 150.6 Low 06:36:55 - 07:06:55 197
Searchlight/Boulder City 06:51:45 -37.6 Dark Down 30.3 153.5 Up 06:36:45 - 07:06:45 194
Laughlin/Bullhead City 06:51:45 -37.9 Dark Down 30.6 153.8 Up 06:36:45 - 07:06:45 186
Mohave Valley 06:51:45 -38.2 Dark Down 30.9 153.7 Up 06:36:45 - 07:06:45 167
Lone Pine 06:51:54 -35.8 Dark Down 28.1 150.7 Low 06:36:54 - 07:06:54 156
Lake Havasu City 06:51:44 -38.6 Dark Down 31.3 153.8 Up 06:36:44 - 07:06:44 148
Parker 06:51:44 -39.0 Dark Down 31.7 153.8 Up 06:36:44 - 07:06:44 124
Blythe 06:51:45 -39.4 Dark Down 32.0 153.3 Up 06:36:45 - 07:06:45 75
Yuma 06:51:45 -40.3 Dark Down 32.8 153.0 Up 06:36:45 - 07:06:45 5
Calipatria 06:51:48 -39.7 Dark Down 32.1 152.2 Up 06:36:48 - 07:06:48 3
Idyllwild 06:51:51 -38.9 Dark Down 31.1 151.2 Up 06:36:51 - 07:06:51 2
CPSLO 06:52:02 -36.4 Dark Down 28.1 147.9 Low 06:37:02 - 07:07:02 -36
Wildwood 06:51:57 -38.1 Dark Down 30.0 149.5 Up 06:36:57 - 07:06:57 -46

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 471318, (2019/05/04 06:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.94 145
7Del Sco       16:00:20.0 -22:37:18  2.3  6.32 152
41 Lib         15:38:54.7 -19:18:08  5.3  0.74 158
PPM 230514     15:38:25.1 -19:54:49  7.1  0.54 158
PPM 230472     15:36:36.2 -19:49:03  9.9  0.14 158
471318         15:36:16.9 -19:42:18 16.4       159
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:54:02 UT

Marc W. Buie, Southwest Research Institute

RECON