RECON: TNO occultation with 505448

Event between (505448) 13SA100 and star UC4-476-001659 with event index number of 223915

Geocentric closest approach at 2019/09/26 05:39:24 UTC

J2000 position of star is 01:04:52.3 +05:04:27
Equinox of date position of star is 01:05:48.0 +05:10:12
Stellar brightness R=14.4, use SENSEUP=64
Star is 130 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 49.8 AU from the Sun and 48.8 AU from the Earth.
The TNO is moving 24.9 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 93 seconds.
The 1-sigma cross-track error in the shadow position is 2025 km.
The sky-plane scale is 35419.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=363.1 km assuming a 5% albedo -- 14.6 sec chord
Diameter=148.2 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 505448, (2019/09/26 05:39UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:44.2 -29:31:02  1.2 46.20 161
Algenib        00:14:15.3 +15:17:35  2.8 16.22 135
80 Psc         01:09:23.3 +05:45:13  5.5  1.04 129
77 Psc         01:06:50.6 +05:00:47  6.7  0.29 130
PPM 144234     01:05:34.5 +05:05:06  9.5  0.12 130
505448         01:05:53.6 +05:10:47 14.4       130
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 13.6 km RECON observability=1.0 and success probability=12.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:40:11 -34.8 Dark Down 31.5 123.0 Up 05:31:58 - 05:48:23 2072
Tonasket 05:40:11 -35.0 Dark Down 31.6 122.9 Up 05:31:59 - 05:48:24 2060
Okanogan 05:40:13 -35.1 Dark Down 31.7 122.6 Up 05:32:00 - 05:48:25 2047
Brewster 05:40:14 -35.3 Dark Down 31.8 122.3 Up 05:32:02 - 05:48:27 2037
Manson/Chelan 05:40:15 -35.3 Dark Down 31.7 121.8 Up 05:32:03 - 05:48:28 2035
Entiat 05:40:16 -35.4 Dark Down 31.7 121.6 Up 05:32:04 - 05:48:29 2025
Wenatchee 05:40:17 -35.5 Dark Down 31.8 121.4 Up 05:32:05 - 05:48:30 2014
Ellensburg 05:40:19 -35.7 Dark Down 31.9 121.0 Up 05:32:07 - 05:48:32 1997
Yakima 05:40:21 -36.0 Dark Down 32.1 120.8 Up 05:32:08 - 05:48:33 1976
Toppenish/White Swan 05:40:21 -36.3 Dark Down 32.3 120.8 Up 05:32:09 - 05:48:34 1960
Goldendale 05:40:24 -36.5 Dark Down 32.4 120.1 Up 05:32:11 - 05:48:36 1940
The Dalles 05:40:25 -36.5 Dark Down 32.2 119.6 Up 05:32:13 - 05:48:38 1937
Pasco 05:40:19 -37.0 Dark Down 33.1 121.9 Up 05:32:06 - 05:48:31 1923
Maupin 05:40:26 -36.8 Dark Down 32.5 119.5 Up 05:32:14 - 05:48:39 1911
George/Umatilla 05:40:21 -37.1 Dark Down 33.2 121.6 Up 05:32:08 - 05:48:33 1910
PNWRO 05:40:19 -37.2 Dark Down 33.4 122.0 Up 05:32:07 - 05:48:32 1904
Madras/Culver 05:40:28 -37.2 Dark Down 32.8 119.2 Up 05:32:16 - 05:48:41 1881
Sisters 05:40:30 -37.2 Dark Down 32.7 118.6 Up 05:32:18 - 05:48:43 1873
Redmond 05:40:29 -37.4 Dark Down 32.9 118.9 Up 05:32:17 - 05:48:42 1862
Bend 05:40:30 -37.5 Dark Down 32.9 118.7 Up 05:32:18 - 05:48:43 1853
Oregon Observatory 05:40:31 -37.6 Dark Down 32.9 118.5 Up 05:32:19 - 05:48:44 1846
La Pine/Gilchrist 05:40:32 -37.7 Dark Down 33.0 118.3 Up 05:32:20 - 05:48:45 1836
North Lake 05:40:32 -38.3 Dark Down 33.6 118.6 Up 05:32:20 - 05:48:45 1795
Chiloquin 05:40:33 -38.3 Dark Down 33.3 117.3 Up 05:32:20 - 05:48:45 1782
Klamath Falls 05:40:33 -38.6 Dark Down 33.5 117.2 Up 05:32:20 - 05:48:45 1761
Paisley 05:40:33 -38.9 Dark Down 34.1 118.6 Up 05:32:20 - 05:48:45 1754
Tulelake 05:40:33 -38.9 Dark Down 33.8 117.3 Up 05:32:20 - 05:48:45 1738
Lakeview 05:40:33 -39.3 Dark Down 34.5 118.5 Up 05:32:20 - 05:48:45 1719
Fall River/Burney 05:40:33 -39.6 Dark Down 34.3 116.9 Up 05:32:20 - 05:48:45 1687
Cedarville 05:40:33 -39.9 Dark Down 34.9 118.3 Up 05:32:20 - 05:48:45 1676
Susanville 05:40:33 -40.4 Dark Down 35.1 117.1 Up 05:32:20 - 05:48:45 1630
Greenville 05:40:33 -40.4 Dark Down 35.0 116.7 Up 05:32:20 - 05:48:45 1626
Gimple 05:40:33 -40.5 Dark Down 35.1 116.8 Up 05:32:20 - 05:48:45 1623
Quincy 05:40:33 -40.6 Dark Down 35.1 116.6 Up 05:32:20 - 05:48:45 1616
Portola 05:40:33 -40.9 Dark Down 35.5 116.9 Up 05:32:20 - 05:48:45 1593
Reno 05:40:33 -41.5 Dark Down 36.0 117.3 Up 05:32:20 - 05:48:45 1557
Carson City 05:40:33 -41.7 Dark Down 36.2 117.1 Up 05:32:20 - 05:48:45 1538
Gardnerville 05:40:33 -41.9 Dark Down 36.4 117.0 Up 05:32:20 - 05:48:45 1524
Yerington 05:40:33 -42.2 Dark Down 36.8 117.5 Up 05:32:20 - 05:48:45 1505
Hawthorne 05:40:33 -42.9 Dark Down 37.3 117.7 Up 05:32:20 - 05:48:45 1462
Lee Vining 05:40:33 -43.0 Dark Down 37.2 116.9 Up 05:32:20 - 05:48:45 1452
Bishop 05:40:33 -43.8 Dark Down 38.0 117.1 Up 05:32:20 - 05:48:45 1395
Tonopah 05:40:33 -44.0 Dark Down 38.5 118.7 Up 05:32:20 - 05:48:45 1384
Lone Pine 05:40:33 -44.5 Dark Down 38.6 116.9 Up 05:32:20 - 05:48:45 1345
Beatty 05:40:33 -45.1 Dark Down 39.4 118.3 Up 05:32:20 - 05:48:45 1305
CPSLO 05:40:58 -43.9 Dark Down 37.3 113.8 Up 05:32:45 - 05:49:10 1273
Indian Springs 05:40:33 -45.9 Dark Down 40.3 119.0 Up 05:32:20 - 05:48:45 1244
Henderson 05:40:33 -46.7 Dark Down 41.1 119.3 Up 05:32:20 - 05:48:45 1186
Idyllwild 05:40:33 -47.3 Dark Down 40.9 115.9 Up 05:32:20 - 05:48:45 1166
Niwot 05:40:06 -47.7 Dark Down 44.9 132.5 Up 05:31:53 - 05:48:18 1157
Searchlight/Boulder City 05:40:33 -47.1 Dark Down 41.4 118.9 Up 05:32:20 - 05:48:45 1153
Wildwood 05:40:56 -46.0 Dark Down 39.4 114.7 Up 05:32:44 - 05:49:09 1127
Laughlin/Bullhead City 05:40:33 -47.5 Dark Down 41.8 119.0 Up 05:32:20 - 05:48:45 1122
Mohave Valley 05:40:33 -47.7 Dark Down 41.9 118.8 Up 05:32:20 - 05:48:45 1108
Patrick 05:40:33 -47.7 Dark Down 42.2 119.8 Up 05:32:20 - 05:48:45 1105
Kingman/Dolan Springs 05:40:33 -47.8 Dark Down 42.1 119.5 Up 05:32:20 - 05:48:45 1100
Calipatria 05:40:33 -48.4 Dark Down 42.0 116.5 Up 05:32:20 - 05:48:45 1080
Lake Havasu City 05:40:33 -48.2 Dark Down 42.3 118.7 Up 05:32:20 - 05:48:45 1076
DCO 05:40:33 -48.4 Dark Down 42.8 120.3 Up 05:32:20 - 05:48:45 1057
Parker 05:40:33 -48.4 Dark Down 42.5 118.4 Up 05:32:20 - 05:48:45 1057
Blythe 05:40:33 -48.6 Dark Down 42.5 117.7 Up 05:32:20 - 05:48:45 1049
Yuma 05:40:33 -49.3 Dark Down 42.9 116.9 Up 05:32:20 - 05:48:45 1015

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 505448, (2019/09/26 05:39UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 46.20 161
Algenib        00:13:14.2 +15:11:01  2.8 16.22 135
80 Psc         01:08:21.9 +05:38:56  5.5  1.04 129
77 Psc         01:05:49.3 +04:54:28  6.7  0.29 130
PPM 144234     01:04:33.2 +04:58:46  9.5  0.12 130
505448         01:04:52.3 +05:04:27 14.4       130
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:19:34 UT

Marc W. Buie, Southwest Research Institute

RECON