RECON: TNO occultation with 03TL58

Event between 03TL58 and star UC4-556-023976 with event index number of 93083

Geocentric closest approach at 2017/12/24 06:03:39 UTC

J2000 position of star is 06:06:52.1 +21:10:38
Equinox of date position of star is 06:07:50.3 +21:10:27
Stellar brightness R=14.3
Star is 114 degrees from the moon. Moon is 29% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 41.8 AU from the Sun and 40.8 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 355 seconds.
The 1-sigma cross-track error in the shadow position is 2318 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=219.8 km assuming a 5% albedo -- 8.6 sec chord
Diameter=89.7 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03TL58, (2017/12/24 06:04UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:08.7 +07:24:32  0.4 14.06 110
Alhena         06:38:45.0 +16:22:57  1.9  8.72 121
62Chi2Ori      06:04:59.3 +20:08:11  4.5  1.25 113
PPM 095321     06:05:10.4 +21:29:31  8.0  0.72 113
PPM 095361     06:06:21.9 +21:23:04  9.4  0.42 113
PPM 095443     06:08:58.8 +21:18:14 10.5  0.27 114
03TL58         06:07:56.6 +21:10:26 14.3       114
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 25.7 km RECON observability=1.0 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:04:48 -56.2 Dark Down 54.9 132.6 Up 05:34:44 - 06:34:52 11756
Tonasket 06:04:48 -56.4 Dark Down 55.1 132.4 Up 05:34:44 - 06:34:52 11734
Okanogan 06:04:48 -56.5 Dark Down 55.2 131.8 Up 05:34:44 - 06:34:52 11704
Brewster 06:04:48 -56.6 Dark Down 55.3 131.2 Up 05:34:44 - 06:34:52 11681
Manson/Chelan 06:04:48 -56.5 Dark Down 55.2 130.5 Up 05:34:44 - 06:34:52 11667
Entiat 06:04:48 -56.6 Dark Down 55.4 130.1 Up 05:34:44 - 06:34:52 11647
Wenatchee 06:04:48 -56.7 Dark Down 55.5 129.7 Up 05:34:44 - 06:34:52 11624
Ellensburg 06:04:59 -56.8 Dark Down 55.6 129.0 Up 05:34:55 - 06:35:03 11584
Yakima 06:05:00 -57.0 Dark Down 55.9 128.5 Up 05:34:56 - 06:35:04 11545
Toppenish/White Swan 06:05:01 -57.3 Dark Down 56.1 128.5 Up 05:34:57 - 06:35:05 11522
Pasco 06:04:48 -58.0 Dark Down 56.8 130.1 Up 05:34:44 - 06:34:52 11495
PNWRO 06:04:48 -58.3 Dark Down 57.1 130.1 Up 05:34:44 - 06:34:52 11468
George/Umatilla 06:04:48 -58.1 Dark Down 56.9 129.4 Up 05:34:44 - 06:34:52 11466
Goldendale 06:05:02 -57.3 Dark Down 56.2 127.3 Up 05:34:58 - 06:35:06 11474
The Dalles 06:05:03 -57.2 Dark Down 56.2 126.5 Up 05:34:59 - 06:35:07 11457
Maupin 06:05:04 -57.5 Dark Down 56.5 126.2 Up 05:35:00 - 06:35:08 11415
Madras/Culver 06:05:05 -57.8 Dark Down 56.8 125.5 Up 05:35:01 - 06:35:09 11362
Sisters 06:05:07 -57.7 Dark Down 56.7 124.5 Up 05:35:03 - 06:35:11 11336
Redmond 06:05:05 -58.0 Dark Down 56.9 125.0 Up 05:35:01 - 06:35:09 11328
Bend 06:05:06 -58.0 Dark Down 57.0 124.5 Up 05:35:02 - 06:35:10 11309
Oregon Observatory 06:05:07 -58.0 Dark Down 57.0 124.1 Up 05:35:03 - 06:35:11 11294
LaPine/Gilchrist 06:05:08 -58.1 Dark Down 57.1 123.8 Up 05:35:04 - 06:35:12 11274
North Lake 06:05:06 -58.6 Dark Down 57.7 124.0 Up 05:35:02 - 06:35:10 11222
Paisley 06:05:06 -59.1 Dark Down 58.2 123.7 Up 05:35:02 - 06:35:10 11162
Chiloquin 06:05:10 -58.4 Dark Down 57.5 121.9 Up 05:35:06 - 06:35:14 11169
Klamath Falls 06:05:10 -58.6 Dark Down 57.7 121.5 Up 05:35:06 - 06:35:14 11134
Lakeview 06:05:06 -59.5 Dark Down 58.6 123.3 Up 05:35:02 - 06:35:10 11109
Tulelake 06:05:09 -58.9 Dark Down 58.0 121.5 Up 05:35:05 - 06:35:13 11102
Cedarville 06:05:07 -59.9 Dark Down 59.1 122.6 Up 05:35:03 - 06:35:11 11040
Fall River/Burney 06:05:10 -59.4 Dark Down 58.6 120.4 Up 05:35:06 - 06:35:14 11009
Susanville 06:05:09 -60.1 Dark Down 59.4 120.4 Up 05:35:05 - 06:35:13 10934
Greenville 06:05:10 -60.0 Dark Down 59.3 119.6 Up 05:35:06 - 06:35:14 10911
Niwot 06:04:22 -69.6 Dark Down 68.1 146.2 Up 05:34:18 - 06:34:26 10728
Quincy 06:05:11 -60.1 Dark Down 59.4 119.4 Up 05:35:07 - 06:35:15 10890
Portola 06:05:09 -60.5 Dark Down 59.8 119.8 Up 05:35:05 - 06:35:13 10870
Reno 06:05:09 -61.1 Dark Down 60.3 120.2 Up 05:35:05 - 06:35:13 10833
Carson City 06:05:09 -61.3 Dark Down 60.5 119.7 Up 05:35:05 - 06:35:13 10796
Yerington 06:05:07 -61.8 Dark Down 61.1 120.2 Up 05:35:03 - 06:35:11 10767
Gardnerville 06:05:08 -61.4 Dark Down 60.7 119.4 Up 05:35:04 - 06:35:12 10770
Hawthorne 06:05:06 -62.3 Dark Down 61.7 120.2 Up 05:35:02 - 06:35:10 10711
Lee Vining 06:05:09 -62.2 Dark Down 61.6 118.7 Up 05:35:05 - 06:35:13 10660
Tonopah 06:05:02 -63.5 Dark Down 62.8 121.4 Up 05:34:58 - 06:35:06 10643
Bishop 06:05:07 -63.0 Dark Down 62.4 118.6 Up 05:35:03 - 06:35:11 10587
Lone Pine 06:05:07 -63.5 Dark Down 63.0 117.8 Up 05:35:03 - 06:35:11 10503
Beatty 06:05:02 -64.4 Dark Down 63.7 120.1 Up 05:34:58 - 06:35:06 10516
Indian Springs 06:04:48 -65.2 Dark Down 64.6 120.9 Up 05:34:44 - 06:34:52 10470
Henderson 06:04:48 -66.0 Dark Down 65.4 121.0 Up 05:34:44 - 06:34:52 10404
Searchlight/Boulder City 06:04:48 -66.3 Dark Down 65.7 120.0 Up 05:34:44 - 06:34:52 10343
CPSLO 06:05:16 -62.0 Dark Down 61.6 112.3 Up 05:35:12 - 06:35:20 10407
Kingman/Dolan Springs 06:04:48 -67.0 Dark Down 66.4 120.8 Up 05:34:44 - 06:34:52 10301
Laughlin/Bullhead City 06:04:48 -66.6 Dark Down 66.1 119.9 Up 05:34:44 - 06:34:52 10306
DCO 06:04:48 -67.7 Dark Down 67.1 122.0 Up 05:34:44 - 06:34:52 10280
Mohave Valley 06:04:48 -66.8 Dark Down 66.2 119.4 Up 05:34:44 - 06:34:52 10277
Lake Havasu City 06:04:48 -67.1 Dark Down 66.6 119.0 Up 05:34:44 - 06:34:52 10231
Parker 06:04:48 -67.3 Dark Down 66.8 118.3 Up 05:34:44 - 06:34:52 10194
Idyllwild 06:05:05 -65.6 Dark Down 65.2 114.2 Up 05:35:01 - 06:35:09 10182
Blythe 06:04:48 -67.2 Dark Down 66.8 116.8 Up 05:34:44 - 06:34:52 10143
Calipatria 06:05:01 -66.7 Dark Down 66.4 114.5 Up 05:34:57 - 06:35:05 10100
Yuma 06:04:48 -67.5 Dark Down 67.2 114.8 Up 05:34:44 - 06:34:52 10045

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.

Event circumstances last updated at 2016/03/13 18:18:13 UT

Marc W. Buie, Southwest Research Institute

RECON