RECON: TNO occultation with 471325

Event between (471325) 11KT19 and star UC4-470-053131 with event index number of 144829

Geocentric closest approach at 2018/05/12 03:59:12 UTC

J2000 position of star is 15:53:06.4 +03:56:58
Equinox of date position of star is 15:53:56.3 +03:54:03
Stellar brightness R=12.6
Star is 131 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 27.4 AU from the Sun and 26.5 AU from the Earth.
The TNO is moving 32.4 km/sec on the sky relative to the star, or, 6.1 arcsec/hr.
The 1-sigma error in the time of the event is 33 seconds.
The 1-sigma cross-track error in the shadow position is 1550 km.
The sky-plane scale is 19219.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 6.8 sec chord
Diameter=89.3 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 471325, (2018/05/12 03:59UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:30.1 +19:05:18  0.0 28.24 150
Unukalhai      15:45:10.4 +06:22:08  2.6  3.31 133
37Eps Ser      15:51:44.0 +04:25:25  3.7  0.78 132
PPM 162038     15:55:36.4 +05:09:25  8.4  1.32 131
PPM 162011     15:54:21.2 +04:02:44  9.9  0.17 131
471325         15:54:01.4 +03:53:45 12.6       131
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 37.5 km RECON observability=0.2 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:02:02 -5.5 CT Down 17.7 104.9 Really Low 03:58:46 - 04:05:18 7818
Tonasket 04:02:02 -5.7 CT Down 17.8 104.8 Really Low 03:58:46 - 04:05:18 7795
Okanogan 04:02:02 -5.8 CT Down 17.8 104.6 Really Low 03:58:46 - 04:05:18 7759
Brewster 04:02:03 -5.8 CT Down 17.7 104.4 Really Low 03:58:47 - 04:05:19 7730
Manson/Chelan 04:02:04 -5.8 CT Down 17.5 104.0 Really Low 03:58:48 - 04:05:20 7706
Entiat 04:02:04 -5.8 CT Down 17.5 103.9 Really Low 03:58:48 - 04:05:20 7684
Wenatchee 04:02:04 -5.9 CT Down 17.5 103.7 Really Low 03:58:48 - 04:05:20 7657
Ellensburg 04:02:04 -6.1 CT Down 17.5 103.4 Really Low 03:58:48 - 04:05:20 7613
Yakima 04:02:05 -6.3 CT Down 17.6 103.3 Really Low 03:58:49 - 04:05:21 7571
Toppenish/White Swan 04:02:05 -6.5 CT Down 17.7 103.3 Really Low 03:58:49 - 04:05:21 7550
Pasco 04:02:04 -7.3 CT Down 18.6 104.3 Really Low 03:58:48 - 04:05:20 7548
PNWRO 04:02:04 -7.6 CT Down 18.8 104.4 Really Low 03:58:48 - 04:05:20 7525
George/Umatilla 04:02:05 -7.4 CT Down 18.6 104.0 Really Low 03:58:49 - 04:05:21 7512
Goldendale 04:02:06 -6.6 CT Down 17.6 102.9 Really Low 03:58:50 - 04:05:22 7490
The Dalles 04:02:07 -6.5 CT Down 17.4 102.5 Really Low 03:58:51 - 04:05:23 7464
Maupin 04:02:07 -6.8 CT Down 17.5 102.5 Really Low 03:58:51 - 04:05:23 7422
Madras/Culver 04:02:08 -7.1 CT Down 17.6 102.3 Really Low 03:58:52 - 04:05:24 7365
Redmond 04:02:08 -7.2 CT Down 17.7 102.1 Really Low 03:58:52 - 04:05:24 7327
Sisters 04:02:08 -7.0 CT Down 17.4 101.8 Really Low 03:58:52 - 04:05:24 7327
Bend 04:02:09 -7.3 CT Down 17.6 101.9 Really Low 03:58:53 - 04:05:25 7304
Oregon Observatory 04:02:09 -7.3 CT Down 17.6 101.8 Really Low 03:58:53 - 04:05:25 7285
La Pine/Gilchrist 04:02:09 -7.4 CT Down 17.6 101.7 Really Low 03:58:53 - 04:05:25 7263
North Lake 04:02:08 -8.0 CT Down 18.1 102.0 Really Low 03:58:52 - 04:05:24 7222
Paisley 04:02:08 -8.5 CT Down 18.5 102.1 Really Low 03:58:52 - 04:05:24 7167
Chiloquin 04:02:10 -7.8 CT Down 17.5 101.1 Really Low 03:58:54 - 04:05:26 7144
Lakeview 04:02:08 -8.9 CT Down 18.7 102.0 Really Low 03:58:52 - 04:05:24 7115
Klamath Falls 04:02:10 -8.0 CT Down 17.7 101.0 Really Low 03:58:54 - 04:05:26 7108
Niwot 04:01:51 -18.9 Dark Down 30.2 112.7 Up 03:58:35 - 04:05:07 7092
Tulelake 04:02:11 -8.4 CT Down 17.9 101.2 Really Low 03:58:55 - 04:05:27 7082
Cedarville 04:02:09 -9.4 CT Down 19.0 102.0 Really Low 03:58:53 - 04:05:25 7047
Fall River/Burney 04:02:11 -8.9 CT Down 18.2 100.9 Really Low 03:58:55 - 04:05:27 6986
Susanville 04:02:11 -9.7 CT Down 18.8 101.2 Really Low 03:58:55 - 04:05:27 6925
Greenville 04:02:12 -9.7 CT Down 18.7 101.0 Really Low 03:58:56 - 04:05:28 6894
Quincy 04:02:12 -9.8 CT Down 18.7 100.9 Really Low 03:58:56 - 04:05:28 6872
Portola 04:02:12 -10.2 CT Down 19.1 101.2 Really Low 03:58:56 - 04:05:28 6863
Reno 04:02:10 -10.8 CT Down 19.6 101.5 Really Low 03:58:54 - 04:05:26 6840
Carson City 04:02:11 -11.0 CT Down 19.7 101.4 Really Low 03:58:55 - 04:05:27 6802
Yerington 04:02:11 -11.5 CT Down 20.3 101.8 Low 03:58:55 - 04:05:27 6787
Gardnerville 04:02:11 -11.1 CT Down 19.8 101.4 Really Low 03:58:55 - 04:05:27 6776
Hawthorne 04:02:11 -12.1 AT Down 20.8 102.0 Low 03:58:55 - 04:05:27 6742
Tonopah 04:02:09 -13.3 AT Down 21.9 102.8 Low 03:58:53 - 04:05:25 6707
Lee Vining 04:02:12 -12.1 AT Down 20.5 101.4 Low 03:58:56 - 04:05:28 6677
Bishop 04:02:11 -12.9 AT Down 21.2 101.7 Low 03:58:55 - 04:05:27 6620
Beatty 04:02:08 -14.2 AT Down 22.5 102.6 Low 03:58:52 - 04:05:24 6587
Indian Springs 04:02:08 -15.1 AT Down 23.5 103.2 Low 03:58:52 - 04:05:24 6565
Lone Pine 04:02:11 -13.6 AT Down 21.6 101.6 Low 03:58:55 - 04:05:27 6541
Henderson 04:02:07 -15.9 AT Down 24.1 103.4 Low 03:58:51 - 04:05:23 6515
Patrick 04:02:06 -17.0 AT Down 25.2 103.9 Low 03:58:50 - 04:05:22 6462
Searchlight/Boulder City 04:02:07 -16.3 AT Down 24.3 103.2 Low 03:58:51 - 04:05:23 6455
DCO 04:02:05 -17.6 AT Down 25.8 104.2 Low 03:58:49 - 04:05:21 6439
Kingman/Dolan Springs 04:02:06 -17.0 AT Down 25.1 103.7 Low 03:58:50 - 04:05:22 6436
Laughlin/Bullhead City 04:02:07 -16.7 AT Down 24.6 103.3 Low 03:58:51 - 04:05:23 6427
Mohave Valley 04:02:07 -16.9 AT Down 24.7 103.2 Low 03:58:51 - 04:05:23 6397
CPSLO 04:02:14 -12.6 AT Down 19.8 99.5 Really Low 03:58:58 - 04:05:30 6376
Lake Havasu City 04:02:07 -17.3 AT Down 25.0 103.2 Low 03:58:51 - 04:05:23 6357
Parker 04:02:07 -17.5 AT Down 25.1 103.1 Low 03:58:51 - 04:05:23 6320
Wildwood 04:02:12 -14.7 AT Down 21.6 100.3 Low 03:58:56 - 04:05:28 6264
Blythe 04:02:08 -17.6 AT Down 25.0 102.6 Low 03:58:52 - 04:05:24 6259
Idyllwild 04:02:11 -16.1 AT Down 23.2 101.3 Low 03:58:55 - 04:05:27 6246
Calipatria 04:02:08 -17.3 AT Down 24.3 101.8 Low 03:58:52 - 04:05:24 6194
Yuma 04:02:08 -18.2 Dark Down 25.2 102.2 Low 03:58:52 - 04:05:24 6158

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 471325, (2018/05/12 03:59UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.4 +19:10:23  0.0 28.24 150
Unukalhai      15:44:16.2 +06:25:33  2.6  3.31 133
37Eps Ser      15:50:49.1 +04:28:41  3.7  0.78 132
PPM 162038     15:54:41.8 +05:12:35  8.4  1.32 131
PPM 162011     15:53:26.2 +04:05:56  9.9  0.17 131
471325         15:53:06.4 +03:56:58 12.6       131
Positions are for J2000

Event circumstances last updated at 2016/09/01 18:25:29 UT

Marc W. Buie, Southwest Research Institute

RECON