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 08:37:59 UTC

J2000 position of star is 13:47:16.3 -11:54:21
Equinox of date position of star is 13:48:13.7 -11:59:41
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 126 seconds.
The 1-sigma cross-track error in the shadow position is 1932 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 10.4 km RECON observability=1.0 and success probability=8.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:37:56 -22.8 Dark Down 23.3 213.4 Low 08:26:58 - 08:48:54 2260
Tonasket 08:37:55 -23.0 Dark Down 23.5 213.4 Low 08:26:57 - 08:48:53 2252
Okanogan 08:37:55 -23.4 Dark Down 23.8 213.4 Low 08:26:57 - 08:48:53 2237
Brewster 08:37:54 -23.6 Dark Down 24.1 213.2 Low 08:26:56 - 08:48:52 2223
Manson/Chelan 08:37:55 -23.9 Dark Down 24.4 212.9 Low 08:26:57 - 08:48:53 2209
Entiat 08:37:55 -24.1 Dark Down 24.6 212.9 Low 08:26:57 - 08:48:53 2199
Wenatchee 08:37:54 -24.4 Dark Down 24.9 212.8 Low 08:26:56 - 08:48:52 2187
Ellensburg 08:37:54 -24.8 Dark Down 25.3 212.7 Low 08:26:56 - 08:48:52 2167
Pasco 08:37:48 -25.4 Dark Down 25.4 214.3 Low 08:26:50 - 08:48:46 2159
PNWRO 08:37:46 -25.6 Dark Down 25.5 214.6 Low 08:26:48 - 08:48:44 2152
Yakima 08:37:53 -25.2 Dark Down 25.6 212.8 Low 08:26:55 - 08:48:51 2150
Toppenish/White Swan 08:37:52 -25.4 Dark Down 25.8 213.0 Low 08:26:54 - 08:48:50 2143
George/Umatilla 08:37:47 -25.7 Dark Down 25.7 214.2 Low 08:26:49 - 08:48:45 2141
Goldendale 08:37:51 -26.0 Dark Down 26.4 212.8 Low 08:26:53 - 08:48:49 2112
The Dalles 08:37:52 -26.3 Dark Down 26.7 212.4 Low 08:26:54 - 08:48:50 2097
Maupin 08:37:50 -26.7 Dark Down 27.0 212.7 Low 08:26:52 - 08:48:48 2080
Niwot 08:36:49 -27.8 Dark Down 23.3 229.0 Low 08:25:51 - 08:47:47 2059
Madras/Culver 08:37:49 -27.2 Dark Down 27.5 212.8 Low 08:26:51 - 08:48:47 2055
Redmond 08:37:49 -27.6 Dark Down 27.8 212.8 Low 08:26:51 - 08:48:47 2037
Sisters 08:37:49 -27.6 Dark Down 28.0 212.4 Low 08:26:51 - 08:48:47 2031
Bend 08:37:48 -27.8 Dark Down 28.1 212.7 Low 08:26:50 - 08:48:46 2025
Oregon Observatory 08:37:48 -28.0 Dark Down 28.3 212.6 Low 08:26:50 - 08:48:46 2014
La Pine/Gilchrist 08:37:48 -28.2 Dark Down 28.5 212.6 Low 08:26:50 - 08:48:46 2004
North Lake 08:37:45 -28.6 Dark Down 28.6 213.4 Low 08:26:47 - 08:48:43 1994
Paisley 08:37:42 -29.1 Dark Down 28.9 213.9 Low 08:26:44 - 08:48:40 1973
Lakeview 08:37:40 -29.5 Dark Down 29.3 214.2 Low 08:26:42 - 08:48:38 1952
Chiloquin 08:37:46 -29.3 Dark Down 29.5 212.6 Low 08:26:48 - 08:48:44 1944
Klamath Falls 08:37:45 -29.7 Dark Down 29.8 212.8 Low 08:26:47 - 08:48:43 1928
Cedarville 08:37:38 -30.1 Dark Down 29.7 214.6 Low 08:26:40 - 08:48:36 1922
Tulelake 08:37:43 -29.9 Dark Down 29.9 213.2 Low 08:26:45 - 08:48:41 1920
Fall River/Burney 08:37:41 -30.8 Dark Down 30.6 213.5 Up 08:26:43 - 08:48:39 1875
Susanville 08:37:37 -31.3 Dark Down 30.8 214.5 Up 08:26:39 - 08:48:35 1856
Gimple 08:37:37 -31.6 Dark Down 31.2 214.4 Up 08:26:39 - 08:48:35 1837
Greenville 08:37:37 -31.6 Dark Down 31.2 214.3 Up 08:26:39 - 08:48:35 1836
Portola 08:37:35 -31.9 Dark Down 31.3 214.9 Up 08:26:37 - 08:48:33 1827
Quincy 08:37:36 -31.8 Dark Down 31.4 214.4 Up 08:26:38 - 08:48:34 1825
Reno 08:37:32 -32.0 Dark Down 31.2 215.6 Up 08:26:34 - 08:48:30 1825
Yerington 08:37:28 -32.5 Dark Down 31.4 216.5 Up 08:26:30 - 08:48:26 1807
Carson City 08:37:31 -32.4 Dark Down 31.5 215.8 Up 08:26:33 - 08:48:29 1806
Gardnerville 08:37:30 -32.6 Dark Down 31.7 215.9 Up 08:26:32 - 08:48:28 1793
Hawthorne 08:37:25 -32.8 Dark Down 31.5 217.2 Up 08:26:27 - 08:48:23 1791
Tonopah 08:37:19 -33.0 Dark Down 31.2 218.7 Up 08:26:21 - 08:48:17 1789
Lee Vining 08:37:24 -33.5 Dark Down 32.2 216.9 Up 08:26:26 - 08:48:22 1750
Beatty 08:37:14 -34.1 Dark Down 31.9 219.6 Up 08:26:16 - 08:48:12 1732
Indian Springs 08:37:10 -34.1 Dark Down 31.6 220.8 Up 08:26:12 - 08:48:08 1731
Bishop 08:37:21 -33.9 Dark Down 32.3 217.8 Up 08:26:23 - 08:48:19 1730
Henderson 08:37:06 -34.5 Dark Down 31.6 221.6 Up 08:26:08 - 08:48:04 1711
Patrick 08:37:01 -34.8 Dark Down 31.5 222.9 Up 08:26:03 - 08:47:59 1692
Lone Pine 08:37:18 -34.6 Dark Down 32.7 218.4 Up 08:26:20 - 08:48:16 1692
DCO 08:36:58 -34.9 Dark Down 31.3 223.7 Up 08:26:00 - 08:47:56 1685
Searchlight/Boulder City 08:37:04 -35.0 Dark Down 32.0 221.9 Up 08:26:06 - 08:48:02 1679
Kingman/Dolan Springs 08:37:01 -35.1 Dark Down 31.7 222.9 Up 08:26:03 - 08:47:59 1676
Laughlin/Bullhead City 08:37:02 -35.2 Dark Down 32.0 222.4 Up 08:26:04 - 08:48:00 1666
Mohave Valley 08:37:02 -35.5 Dark Down 32.2 222.5 Up 08:26:04 - 08:48:00 1650
Lake Havasu City 08:37:00 -35.8 Dark Down 32.4 222.9 Up 08:26:02 - 08:47:58 1630
Parker 08:36:58 -36.1 Dark Down 32.6 223.1 Up 08:26:00 - 08:47:56 1609
Blythe 08:36:58 -36.7 Dark Down 33.2 223.0 Up 08:26:00 - 08:47:56 1572
CPSLO 08:37:24 -36.3 Dark Down 35.0 216.3 Up 08:26:26 - 08:48:22 1566
Idyllwild 08:37:06 -37.1 Dark Down 34.3 220.9 Up 08:26:08 - 08:48:04 1543
Wildwood 08:37:13 -37.2 Dark Down 35.0 218.9 Up 08:26:15 - 08:48:11 1531
Calipatria 08:37:00 -37.4 Dark Down 34.1 222.4 Up 08:26:02 - 08:47:58 1526
Yuma 08:36:55 -37.6 Dark Down 33.9 223.4 Up 08:25:57 - 08:47:53 1513

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 2017/12/06 18:54:58 UT

Marc W. Buie, Southwest Research Institute

RECON