RECON: TNO occultation with 10XE91

Event between 10XE91 and star UC4-488-015609 with event index number of 235109

Geocentric closest approach at 2018/11/14 07:47:15 UTC

J2000 position of star is 05:53:17.6 +07:35:42
Equinox of date position of star is 05:54:16.1 +07:35:52
Stellar brightness R=16.2, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 39.2 AU from the Sun and 38.4 AU from the Earth.
The TNO is moving 19.5 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 623 seconds.
The 1-sigma cross-track error in the shadow position is 1533 km.
The sky-plane scale is 27851.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=291.1 km assuming a 5% albedo -- 14.9 sec chord
Diameter=118.8 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 10XE91, (2018/11/14 07:47UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.6 +07:24:33  0.4  0.50 138
Bellatrix      05:26:08.6 +06:21:55  1.6  7.10 131
52 Ori         05:49:01.0 +06:27:34  5.5  1.74 136
PPM 149627     05:55:30.3 +08:03:24  7.2  0.55 138
PPM 149580     05:53:36.7 +07:33:04  9.6  0.18 137
PPM 149610     05:54:40.9 +07:34:46 10.7  0.09 138
10XE91         05:54:19.0 +07:35:53 16.2       138
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 1.4 sigma about the mid-time.
The median site spacing is 18.8 km RECON observability=1.0 and success probability=17.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:48:22 -59.3 Dark Down 38.1 130.2 Up 07:33:22 - 08:03:22 -1193
Tonasket 07:48:22 -59.5 Dark Down 38.3 130.1 Up 07:33:22 - 08:03:22 -1212
Okanogan 07:48:22 -59.8 Dark Down 38.4 129.7 Up 07:33:22 - 08:03:22 -1239
Brewster 07:48:22 -60.1 Dark Down 38.5 129.3 Up 07:33:22 - 08:03:22 -1260
Manson/Chelan 07:48:22 -60.3 Dark Down 38.4 128.8 Up 07:33:22 - 08:03:22 -1277
Entiat 07:48:22 -60.6 Dark Down 38.5 128.6 Up 07:33:22 - 08:03:22 -1296
Wenatchee 07:48:22 -60.8 Dark Down 38.6 128.3 Up 07:33:22 - 08:03:22 -1318
Toppenish/White Swan 07:48:46 -61.9 Dark Down 39.3 127.7 Up 07:33:46 - 08:03:46 -1330
Ellensburg 07:48:22 -61.2 Dark Down 38.8 127.8 Up 07:33:22 - 08:03:22 -1355
Goldendale 07:48:49 -62.4 Dark Down 39.4 126.9 Up 07:33:49 - 08:03:49 -1362
The Dalles 07:48:51 -62.6 Dark Down 39.3 126.4 Up 07:33:51 - 08:03:51 -1372
Yakima 07:48:22 -61.6 Dark Down 39.0 127.5 Up 07:33:22 - 08:03:22 -1391
Maupin 07:48:52 -63.1 Dark Down 39.7 126.2 Up 07:33:52 - 08:03:52 -1404
Pasco 07:48:22 -61.9 Dark Down 40.0 128.9 Up 07:33:22 - 08:03:22 -1421
PNWRO 07:48:22 -62.2 Dark Down 40.3 129.0 Up 07:33:22 - 08:03:22 -1443
Madras/Culver 07:48:54 -63.6 Dark Down 40.0 125.8 Up 07:33:54 - 08:03:54 -1444
George/Umatilla 07:48:22 -62.3 Dark Down 40.1 128.4 Up 07:33:22 - 08:03:22 -1451
Sisters 07:48:56 -63.9 Dark Down 39.9 125.1 Up 07:33:56 - 08:03:56 -1460
Redmond 07:48:55 -64.0 Dark Down 40.1 125.5 Up 07:33:55 - 08:03:55 -1469
Bend 07:48:57 -64.2 Dark Down 40.2 125.2 Up 07:33:57 - 08:03:57 -1483
Oregon Observatory 07:48:57 -64.3 Dark Down 40.2 125.0 Up 07:33:57 - 08:03:57 -1493
La Pine/Gilchrist 07:48:58 -64.6 Dark Down 40.3 124.8 Up 07:33:58 - 08:03:58 -1507
North Lake 07:48:58 -65.0 Dark Down 40.9 125.1 Up 07:33:58 - 08:03:58 -1552
Chiloquin 07:49:03 -65.7 Dark Down 40.7 123.6 Up 07:34:03 - 08:04:03 -1585
Paisley 07:48:59 -65.5 Dark Down 41.4 125.1 Up 07:33:59 - 08:03:59 -1602
Klamath Falls 07:49:04 -66.0 Dark Down 41.0 123.5 Up 07:34:04 - 08:04:04 -1613
Tulelake 07:49:04 -66.3 Dark Down 41.3 123.6 Up 07:34:04 - 08:04:04 -1640
Lakeview 07:49:00 -66.0 Dark Down 41.8 124.9 Up 07:34:00 - 08:04:00 -1645
Cedarville 07:49:01 -66.7 Dark Down 42.3 124.6 Up 07:34:01 - 08:04:01 -1700
Fall River/Burney 07:49:07 -67.2 Dark Down 41.8 123.0 Up 07:34:07 - 08:04:07 -1713
Susanville 07:49:06 -67.8 Dark Down 42.7 123.3 Up 07:34:06 - 08:04:06 -1778
Greenville 07:49:08 -68.1 Dark Down 42.6 122.8 Up 07:34:08 - 08:04:08 -1794
Gimple 07:49:08 -68.1 Dark Down 42.7 122.8 Up 07:34:08 - 08:04:08 -1796
Quincy 07:49:08 -68.3 Dark Down 42.7 122.6 Up 07:34:08 - 08:04:08 -1810
Portola 07:49:08 -68.4 Dark Down 43.1 123.0 Up 07:34:08 - 08:04:08 -1830
Reno 07:49:06 -68.7 Dark Down 43.7 123.5 Up 07:34:06 - 08:04:06 -1866
Carson City 07:49:08 -69.0 Dark Down 43.9 123.2 Up 07:34:08 - 08:04:08 -1895
Gardnerville 07:49:08 -69.3 Dark Down 44.1 123.1 Up 07:34:08 - 08:04:08 -1916
Yerington 07:49:06 -69.2 Dark Down 44.4 123.7 Up 07:34:06 - 08:04:06 -1925
Hawthorne 07:49:05 -69.6 Dark Down 45.0 123.9 Up 07:34:05 - 08:04:05 -1974
Lee Vining 07:49:09 -70.2 Dark Down 45.0 122.9 Up 07:34:09 - 08:04:09 -2011
Tonopah 07:49:02 -69.9 Dark Down 46.2 125.0 Up 07:34:02 - 08:04:02 -2043
Bishop 07:49:08 -70.7 Dark Down 45.8 123.2 Up 07:34:08 - 08:04:08 -2076
Niwot 07:48:13 -64.2 Dark Down 51.5 141.4 Up 07:33:13 - 08:03:13 -2126
Lone Pine 07:49:09 -71.4 Dark Down 46.5 122.8 Up 07:34:09 - 08:04:09 -2148
Beatty 07:49:04 -70.9 Dark Down 47.1 124.5 Up 07:34:04 - 08:04:04 -2151
CPSLO 07:49:22 -72.9 Dark Down 45.4 119.1 Up 07:34:22 - 08:04:22 -2202
Indian Springs 07:49:00 -71.0 Dark Down 48.0 125.4 Up 07:34:00 - 08:04:00 -2203
Henderson 07:49:00 -71.4 Dark Down 48.8 125.7 Up 07:34:00 - 08:04:00 -2264
Searchlight/Boulder City 07:49:01 -71.9 Dark Down 49.2 125.2 Up 07:34:01 - 08:04:01 -2316
Patrick 07:48:57 -71.6 Dark Down 49.9 126.3 Up 07:33:57 - 08:03:57 -2344
Laughlin/Bullhead City 07:49:00 -72.1 Dark Down 49.6 125.3 Up 07:34:00 - 08:04:00 -2349
Wildwood 07:49:18 -74.0 Dark Down 47.4 120.0 Up 07:34:18 - 08:04:18 -2353
Kingman/Dolan Springs 07:48:59 -71.9 Dark Down 49.9 125.9 Up 07:33:59 - 08:03:59 -2359
Mohave Valley 07:49:01 -72.3 Dark Down 49.7 125.0 Up 07:34:01 - 08:04:01 -2373
DCO 07:48:55 -71.7 Dark Down 50.5 126.8 Up 07:33:55 - 08:03:55 -2387
Lake Havasu City 07:49:01 -72.6 Dark Down 50.1 124.9 Up 07:34:01 - 08:04:01 -2414
Idyllwild 07:49:12 -74.0 Dark Down 48.9 121.6 Up 07:34:12 - 08:04:12 -2428
Parker 07:49:02 -72.9 Dark Down 50.4 124.6 Up 07:34:02 - 08:04:02 -2446
Blythe 07:49:05 -73.5 Dark Down 50.5 123.8 Up 07:34:05 - 08:04:05 -2486
Calipatria 07:49:10 -74.3 Dark Down 50.1 122.3 Up 07:34:10 - 08:04:10 -2509
Yuma 07:49:08 -74.4 Dark Down 50.9 122.8 Up 07:34:08 - 08:04:08 -2568

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 10XE91, (2018/11/14 07:47UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  0.50 138
Bellatrix      05:25:07.8 +06:20:58  1.6  7.10 131
52 Ori         05:48:00.2 +06:27:15  5.5  1.74 136
PPM 149627     05:54:28.7 +08:03:15  7.2  0.55 138
PPM 149580     05:52:35.4 +07:32:52  9.6  0.18 137
PPM 149610     05:53:39.5 +07:34:36 10.7  0.09 138
10XE91         05:53:17.6 +07:35:42 16.2       138
Positions are for J2000

Event circumstances last updated at 2018/01/01 18:25:52 UT

Marc W. Buie, Southwest Research Institute

RECON