RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star UC4-488-018814 with event index number of 166704

Geocentric closest approach at 2018/11/27 11:22:24 UTC

J2000 position of star is 06:08:44.1 +07:25:31
Equinox of date position of star is 06:09:42.9 +07:25:17
Stellar brightness R=16.2, use SENSEUP=128
Star is 33 degrees from the moon. Moon is 78% illuminated.
TNO apparent brightness V=20.1

[RECON map]
TNO is 30.0 AU from the Sun and 29.1 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 83 seconds.
The 1-sigma cross-track error in the shadow position is 1124 km.
The sky-plane scale is 21110.4 km/arcsec.

The TNO has an absolute magnitude Hv=5.3
Diameter=478.6 km assuming a 5% albedo -- 24.5 sec chord
Diameter=195.4 km assuming a 30% albedo -- 10.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 55638, (2018/11/27 11:22UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.8 +07:24:33  0.4  3.36  36
Bellatrix      05:26:08.8 +06:21:55  1.6 10.88  44
PPM 150217     06:17:59.6 +07:02:40  6.4  2.08  32
PPM 149981     06:10:08.7 +07:30:33  7.9  0.13  33
55638          06:09:45.5 +07:25:16 16.2        33
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 21.8 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 11:20:28 -39.3 Dark Up 43.5 215.0 Up 11:13:05 - 11:27:51 6339
Tonasket 11:20:28 -39.4 Dark Up 43.7 215.2 Up 11:13:05 - 11:27:51 6319
Okanogan 11:20:28 -39.6 Dark Up 44.0 215.2 Up 11:13:05 - 11:27:51 6291
Brewster 11:20:29 -39.8 Dark Up 44.3 215.1 Up 11:13:06 - 11:27:52 6269
Manson/Chelan 11:20:30 -40.0 Dark Up 44.7 214.7 Up 11:13:07 - 11:27:53 6253
Entiat 11:20:30 -40.1 Dark Up 44.9 214.7 Up 11:13:07 - 11:27:53 6234
Wenatchee 11:20:30 -40.3 Dark Up 45.1 214.8 Up 11:13:07 - 11:27:53 6213
Ellensburg 11:20:30 -40.5 Dark Up 45.5 214.7 Up 11:13:07 - 11:27:53 6178
Yakima 11:20:31 -40.6 Dark Up 45.9 214.9 Up 11:13:08 - 11:27:54 6142
Toppenish/White Swan 11:20:29 -40.5 Dark Up 46.0 215.3 Up 11:13:06 - 11:27:52 6121
Pasco 11:20:26 -39.7 Dark Up 45.6 217.0 Up 11:13:03 - 11:27:49 6099
Goldendale 11:20:30 -40.9 Dark Up 46.6 215.1 Up 11:13:07 - 11:27:53 6074
PNWRO 11:20:24 -39.6 Dark Up 45.7 217.4 Up 11:13:01 - 11:27:47 6074
George/Umatilla 11:20:25 -39.9 Dark Up 45.9 216.9 Up 11:13:02 - 11:27:48 6070
The Dalles 11:20:31 -41.2 Dark Up 46.9 214.7 Up 11:13:08 - 11:27:54 6057
Maupin 11:20:31 -41.2 Dark Up 47.2 215.1 Up 11:13:08 - 11:27:54 6018
Madras/Culver 11:20:30 -41.4 Dark Up 47.7 215.4 Up 11:13:07 - 11:27:53 5969
Sisters 11:20:33 -41.8 Dark Up 48.2 215.0 Up 11:13:10 - 11:27:56 5942
Redmond 11:20:30 -41.5 Dark Up 48.0 215.6 Up 11:13:07 - 11:27:53 5936
Bend 11:20:31 -41.6 Dark Up 48.2 215.5 Up 11:13:08 - 11:27:54 5918
Oregon Observatory 11:20:31 -41.8 Dark Up 48.4 215.4 Up 11:13:08 - 11:27:54 5903
La Pine/Gilchrist 11:20:31 -41.8 Dark Up 48.6 215.5 Up 11:13:08 - 11:27:54 5885
North Lake 11:20:29 -41.5 Dark Up 48.7 216.6 Up 11:13:06 - 11:27:52 5839
Chiloquin 11:20:31 -42.3 Dark Up 49.7 215.8 Up 11:13:08 - 11:27:54 5784
Paisley 11:20:27 -41.3 Dark Up 49.0 217.5 Up 11:13:04 - 11:27:50 5784
Klamath Falls 11:20:31 -42.3 Dark Up 49.9 216.1 Up 11:13:08 - 11:27:54 5751
Lakeview 11:20:27 -41.3 Dark Up 49.3 218.1 Up 11:13:04 - 11:27:50 5734
Tulelake 11:20:30 -42.1 Dark Up 50.0 216.7 Up 11:13:07 - 11:27:53 5723
Cedarville 11:20:26 -41.2 Dark Up 49.8 218.8 Up 11:13:03 - 11:27:49 5670
Fall River/Burney 11:20:30 -42.2 Dark Up 50.7 217.5 Up 11:13:07 - 11:27:53 5636
Susanville 11:20:27 -41.7 Dark Up 50.9 219.0 Up 11:13:04 - 11:27:50 5568
Greenville 11:20:27 -42.0 Dark Up 51.2 218.8 Up 11:13:04 - 11:27:50 5545
Gimple 11:20:27 -41.9 Dark Up 51.2 218.9 Up 11:13:04 - 11:27:50 5544
Quincy 11:20:27 -42.0 Dark Up 51.4 218.9 Up 11:13:04 - 11:27:50 5525
Portola 11:20:25 -41.7 Dark Up 51.2 219.7 Up 11:13:02 - 11:27:48 5509
Reno 11:20:23 -41.2 Dark Up 51.1 220.8 Up 11:13:00 - 11:27:46 5477
Carson City 11:20:23 -41.2 Dark Up 51.4 221.1 Up 11:13:00 - 11:27:46 5441
Niwot 11:19:34 -30.1 Dark Up 42.4 237.4 Up 11:12:11 - 11:26:57 5423
Gardnerville 11:20:23 -41.2 Dark Up 51.5 221.4 Up 11:13:00 - 11:27:46 5417
Yerington 11:20:20 -40.8 Dark Up 51.2 222.1 Up 11:12:57 - 11:27:43 5416
Hawthorne 11:20:18 -40.4 Dark Up 51.3 223.2 Up 11:12:55 - 11:27:41 5366
Lee Vining 11:20:20 -40.8 Dark Up 51.9 223.0 Up 11:12:57 - 11:27:43 5315
Tonopah 11:20:13 -39.3 Dark Up 50.8 225.4 Up 11:12:50 - 11:27:36 5307
Bishop 11:20:17 -40.3 Dark Up 52.0 224.5 Up 11:12:54 - 11:27:40 5249
Beatty 11:20:11 -39.0 Dark Up 51.4 227.1 Up 11:12:48 - 11:27:34 5188
Lone Pine 11:20:15 -40.0 Dark Up 52.3 225.7 Up 11:12:52 - 11:27:38 5171
Indian Springs 11:20:06 -38.2 Dark Up 51.0 228.7 Up 11:12:43 - 11:27:29 5146
Henderson 11:20:04 -37.6 Dark Up 50.9 230.1 Up 11:12:41 - 11:27:27 5086
CPSLO 11:20:25 -42.2 Dark Up 54.7 223.4 Up 11:13:02 - 11:27:48 5067
Searchlight/Boulder City 11:20:03 -37.6 Dark Up 51.2 230.7 Up 11:12:40 - 11:27:26 5028
Patrick 11:19:59 -36.7 Dark Up 50.6 232.0 Up 11:12:36 - 11:27:22 5014
Laughlin/Bullhead City 11:20:01 -37.3 Dark Up 51.2 231.4 Up 11:12:38 - 11:27:24 4995
Kingman/Dolan Springs 11:20:00 -36.9 Dark Up 50.9 232.0 Up 11:12:37 - 11:27:23 4993
DCO 11:19:57 -36.1 Dark Up 50.3 233.1 Up 11:12:34 - 11:27:20 4977
Mohave Valley 11:20:01 -37.3 Dark Up 51.4 231.7 Up 11:12:38 - 11:27:24 4967
Lake Havasu City 11:20:00 -37.1 Dark Up 51.5 232.3 Up 11:12:37 - 11:27:23 4925
Wildwood 11:20:16 -40.5 Dark Up 54.4 227.4 Up 11:12:53 - 11:27:39 4923
Parker 11:20:00 -37.0 Dark Up 51.7 232.7 Up 11:12:37 - 11:27:23 4889
Idyllwild 11:20:08 -39.0 Dark Up 53.5 230.2 Up 11:12:45 - 11:27:31 4869
Blythe 11:20:01 -37.3 Dark Up 52.2 232.9 Up 11:12:38 - 11:27:24 4838
Calipatria 11:20:04 -38.0 Dark Up 53.1 232.3 Up 11:12:41 - 11:27:27 4795
Yuma 11:20:00 -37.2 Dark Up 52.8 233.8 Up 11:12:37 - 11:27:23 4743

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 55638, (2018/11/27 11:22UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  3.36  36
Bellatrix      05:25:07.8 +06:20:58  1.6 10.88  44
PPM 150217     06:16:58.4 +07:03:09  6.4  2.08  32
PPM 149981     06:09:07.2 +07:30:48  7.9  0.13  33
55638          06:08:44.1 +07:25:31 16.2        33
Positions are for J2000

Event circumstances last updated at 2018/02/13 17:09:13 UT

Marc W. Buie, Southwest Research Institute

RECON