RECON: TNO occultation with 472235

Event between (472235) 14GE45 and star UC4-391-059632 with event index number of 193671

Geocentric closest approach at 2019/05/10 08:38:08 UTC

J2000 position of star is 13:47:16.3 -11:54:21
Equinox of date position of star is 13:48:12.0 -11:59:32
Stellar brightness R=16.3, use SENSEUP=128
Star is 92 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 33.5 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 21.8 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 117 seconds.
The 1-sigma cross-track error in the shadow position is 1840 km.
The sky-plane scale is 23632.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 14.5 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 472235, (2019/05/10 08:38UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:12.9 -11:15:42  1.0  5.46  87
86 Vir         13:46:58.4 -12:31:22  5.1  0.61  92
PPM 227806     13:46:54.1 -11:19:01  8.1  0.77  91
PPM 227847     13:48:24.2 -12:13:07  9.4  0.22  92
472235         13:48:18.3 -12:00:06 16.3        92
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 10.3 km RECON observability=1.0 and success probability=9.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:38:04 -22.8 Dark Down 23.2 213.4 Low 08:27:49 - 08:48:19 2048
Tonasket 08:38:04 -23.0 Dark Down 23.4 213.5 Low 08:27:49 - 08:48:19 2039
Okanogan 08:38:03 -23.3 Dark Down 23.8 213.4 Low 08:27:48 - 08:48:18 2024
Brewster 08:38:02 -23.6 Dark Down 24.1 213.2 Low 08:27:47 - 08:48:17 2011
Manson/Chelan 08:38:04 -23.9 Dark Down 24.4 212.9 Low 08:27:49 - 08:48:19 1997
Entiat 08:38:03 -24.1 Dark Down 24.6 212.9 Low 08:27:48 - 08:48:18 1987
Wenatchee 08:38:02 -24.4 Dark Down 24.9 212.9 Low 08:27:47 - 08:48:17 1975
Ellensburg 08:38:02 -24.8 Dark Down 25.3 212.8 Low 08:27:47 - 08:48:17 1955
Pasco 08:37:56 -25.4 Dark Down 25.4 214.4 Low 08:27:41 - 08:48:11 1946
PNWRO 08:37:56 -25.6 Dark Down 25.5 214.6 Low 08:27:41 - 08:48:11 1940
Yakima 08:38:01 -25.2 Dark Down 25.6 212.8 Low 08:27:46 - 08:48:16 1938
Toppenish/White Swan 08:38:00 -25.4 Dark Down 25.7 213.1 Low 08:27:45 - 08:48:15 1931
George/Umatilla 08:37:56 -25.7 Dark Down 25.7 214.2 Low 08:27:41 - 08:48:11 1928
Goldendale 08:38:00 -26.0 Dark Down 26.4 212.8 Low 08:27:45 - 08:48:15 1901
The Dalles 08:38:01 -26.3 Dark Down 26.7 212.5 Low 08:27:46 - 08:48:16 1884
Maupin 08:38:00 -26.7 Dark Down 27.0 212.7 Low 08:27:45 - 08:48:15 1868
Niwot 08:36:57 -27.8 Dark Down 23.3 229.0 Low 08:26:42 - 08:47:12 1847
Madras/Culver 08:37:58 -27.2 Dark Down 27.5 212.8 Low 08:27:43 - 08:48:13 1843
Redmond 08:37:57 -27.6 Dark Down 27.8 212.8 Low 08:27:42 - 08:48:12 1826
Sisters 08:37:59 -27.6 Dark Down 27.9 212.4 Low 08:27:44 - 08:48:14 1820
Bend 08:37:57 -27.8 Dark Down 28.1 212.8 Low 08:27:42 - 08:48:12 1814
Oregon Observatory 08:37:57 -28.0 Dark Down 28.2 212.7 Low 08:27:42 - 08:48:12 1804
La Pine/Gilchrist 08:37:56 -28.2 Dark Down 28.4 212.7 Low 08:27:41 - 08:48:11 1793
North Lake 08:37:54 -28.6 Dark Down 28.6 213.4 Low 08:27:39 - 08:48:09 1783
Paisley 08:37:51 -29.1 Dark Down 28.9 213.9 Low 08:27:36 - 08:48:06 1763
Lakeview 08:37:49 -29.5 Dark Down 29.2 214.3 Low 08:27:34 - 08:48:04 1741
Chiloquin 08:37:55 -29.3 Dark Down 29.5 212.6 Low 08:27:40 - 08:48:10 1733
Klamath Falls 08:37:54 -29.7 Dark Down 29.8 212.8 Low 08:27:39 - 08:48:09 1718
Cedarville 08:37:46 -30.1 Dark Down 29.7 214.7 Low 08:27:31 - 08:48:01 1711
Tulelake 08:37:52 -29.9 Dark Down 29.9 213.2 Low 08:27:37 - 08:48:07 1710
Fall River/Burney 08:37:49 -30.8 Dark Down 30.6 213.6 Up 08:27:34 - 08:48:04 1665
Susanville 08:37:45 -31.3 Dark Down 30.8 214.5 Up 08:27:30 - 08:48:00 1645
Gimple 08:37:46 -31.6 Dark Down 31.2 214.4 Up 08:27:31 - 08:48:01 1627
Greenville 08:37:46 -31.6 Dark Down 31.2 214.3 Up 08:27:31 - 08:48:01 1625
Portola 08:37:43 -31.9 Dark Down 31.3 214.9 Up 08:27:28 - 08:47:58 1617
Quincy 08:37:45 -31.8 Dark Down 31.4 214.4 Up 08:27:30 - 08:48:00 1615
Reno 08:37:41 -32.0 Dark Down 31.2 215.7 Up 08:27:26 - 08:47:56 1614
Yerington 08:37:36 -32.5 Dark Down 31.3 216.5 Up 08:27:21 - 08:47:51 1596
Carson City 08:37:39 -32.4 Dark Down 31.5 215.8 Up 08:27:24 - 08:47:54 1595
Gardnerville 08:37:38 -32.6 Dark Down 31.6 215.9 Up 08:27:23 - 08:47:53 1583
Hawthorne 08:37:34 -32.8 Dark Down 31.5 217.2 Up 08:27:19 - 08:47:49 1580
Tonopah 08:37:28 -33.0 Dark Down 31.2 218.8 Up 08:27:13 - 08:47:43 1579
Lee Vining 08:37:33 -33.5 Dark Down 32.2 216.9 Up 08:27:18 - 08:47:48 1540
Beatty 08:37:23 -34.1 Dark Down 31.8 219.6 Up 08:27:08 - 08:47:38 1520
Indian Springs 08:37:18 -34.1 Dark Down 31.5 220.8 Up 08:27:03 - 08:47:33 1519
Bishop 08:37:29 -33.9 Dark Down 32.3 217.9 Up 08:27:14 - 08:47:44 1519
Henderson 08:37:14 -34.5 Dark Down 31.6 221.7 Up 08:26:59 - 08:47:29 1499
Lone Pine 08:37:26 -34.6 Dark Down 32.7 218.5 Up 08:27:11 - 08:47:41 1481
Patrick 08:37:09 -34.8 Dark Down 31.5 223.0 Up 08:26:54 - 08:47:24 1480
DCO 08:37:06 -34.9 Dark Down 31.3 223.8 Up 08:26:51 - 08:47:21 1474
Searchlight/Boulder City 08:37:12 -35.0 Dark Down 32.0 222.0 Up 08:26:57 - 08:47:27 1467
Kingman/Dolan Springs 08:37:09 -35.1 Dark Down 31.7 222.9 Up 08:26:54 - 08:47:24 1464
Laughlin/Bullhead City 08:37:11 -35.2 Dark Down 32.0 222.4 Up 08:26:56 - 08:47:26 1454
Mohave Valley 08:37:10 -35.5 Dark Down 32.2 222.5 Up 08:26:55 - 08:47:25 1438
Lake Havasu City 08:37:08 -35.8 Dark Down 32.4 222.9 Up 08:26:53 - 08:47:23 1418
Parker 08:37:07 -36.1 Dark Down 32.6 223.1 Up 08:26:52 - 08:47:22 1397
Blythe 08:37:07 -36.7 Dark Down 33.2 223.1 Up 08:26:52 - 08:47:22 1360
CPSLO 08:37:31 -36.3 Dark Down 35.0 216.4 Up 08:27:16 - 08:47:46 1355
Idyllwild 08:37:13 -37.1 Dark Down 34.3 221.0 Up 08:26:58 - 08:47:28 1333
Wildwood 08:37:21 -37.2 Dark Down 35.0 219.0 Up 08:27:06 - 08:47:36 1320
Calipatria 08:37:09 -37.4 Dark Down 34.1 222.4 Up 08:26:54 - 08:47:24 1313
Yuma 08:37:04 -37.6 Dark Down 33.9 223.4 Up 08:26:49 - 08:47:19 1301

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 472235, (2019/05/10 08:38UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  5.46  87
86 Vir         13:45:56.3 -12:25:35  5.1  0.61  92
PPM 227806     13:45:52.3 -11:13:14  8.1  0.77  91
PPM 227847     13:47:22.1 -12:07:21  9.4  0.22  92
472235         13:47:16.3 -11:54:21 16.3        92
Positions are for J2000

Event circumstances last updated at 2017/06/01 18:10:32 UT

Marc W. Buie, Southwest Research Institute

RECON