RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star GA0960:01268922 with event index number of 342777

Geocentric closest approach at 2018/11/27 11:22:02 UTC

J2000 position of star is 06:08:44.1 +07:25:31
Equinox of date position of star is 06:09:45.2 +07:25:16
Stellar brightness G=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 114 seconds.
The 1-sigma cross-track error in the shadow position is 1187 km.
The sky-plane scale is 21110.4 km/arcsec.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 24.5 sec chord
Diameter=214.3 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 +07:30:32  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 20.4 km RECON observability=1.0 and success probability=1.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:20:08 -39.1 Dark Up 42.7 214.5 Up 11:10:10 - 11:30:06 5485
Summerland 11:20:10 -39.4 Dark Up 42.9 214.1 Up 11:10:12 - 11:30:08 5484
Penticton 11:20:09 -39.3 Dark Up 43.1 214.5 Up 11:10:11 - 11:30:07 5455
Okanagan Falls 11:20:09 -39.4 Dark Up 43.3 214.5 Up 11:10:11 - 11:30:07 5439
Oliver 11:20:08 -39.4 Dark Up 43.4 214.6 Up 11:10:10 - 11:30:06 5424
Anarchist Mountain Observatory 11:20:08 -39.3 Dark Up 43.5 215.0 Up 11:10:10 - 11:30:06 5408
Oroville 11:20:08 -39.4 Dark Up 43.6 214.9 Up 11:10:10 - 11:30:06 5402
Tonasket 11:20:07 -39.5 Dark Up 43.7 215.1 Up 11:10:09 - 11:30:05 5381
Okanogan 11:20:07 -39.6 Dark Up 44.1 215.1 Up 11:10:09 - 11:30:05 5353
Brewster 11:20:08 -39.8 Dark Up 44.4 215.0 Up 11:10:10 - 11:30:06 5331
Manson/Chelan 11:20:09 -40.1 Dark Up 44.7 214.6 Up 11:10:11 - 11:30:07 5316
Entiat 11:20:09 -40.2 Dark Up 44.9 214.6 Up 11:10:11 - 11:30:07 5297
Wenatchee 11:20:10 -40.3 Dark Up 45.1 214.7 Up 11:10:12 - 11:30:08 5275
Ellensburg 11:20:10 -40.6 Dark Up 45.6 214.6 Up 11:10:12 - 11:30:08 5240
Yakima 11:20:10 -40.7 Dark Up 45.9 214.8 Up 11:10:12 - 11:30:08 5204
Toppenish/White Swan 11:20:09 -40.6 Dark Up 46.0 215.2 Up 11:10:11 - 11:30:07 5183
Pasco 11:20:05 -39.8 Dark Up 45.6 216.9 Up 11:10:07 - 11:30:03 5161
Goldendale 11:20:10 -41.0 Dark Up 46.6 214.9 Up 11:10:12 - 11:30:08 5137
PNWRO 11:20:04 -39.7 Dark Up 45.7 217.3 Up 11:10:06 - 11:30:02 5137
George/Umatilla 11:20:05 -40.0 Dark Up 46.0 216.8 Up 11:10:07 - 11:30:03 5133
The Dalles 11:20:11 -41.3 Dark Up 47.0 214.6 Up 11:10:13 - 11:30:09 5120
Maupin 11:20:10 -41.3 Dark Up 47.3 215.0 Up 11:10:12 - 11:30:08 5081
Madras/Culver 11:20:10 -41.4 Dark Up 47.7 215.3 Up 11:10:12 - 11:30:08 5031
Sisters 11:20:12 -41.8 Dark Up 48.2 214.9 Up 11:10:14 - 11:30:10 5005
Redmond 11:20:10 -41.6 Dark Up 48.1 215.4 Up 11:10:12 - 11:30:08 4999
Bend 11:20:10 -41.7 Dark Up 48.3 215.4 Up 11:10:12 - 11:30:08 4980
Oregon Observatory 11:20:11 -41.8 Dark Up 48.5 215.3 Up 11:10:13 - 11:30:09 4966
La Pine/Gilchrist 11:20:10 -41.9 Dark Up 48.7 215.4 Up 11:10:12 - 11:30:08 4947
North Lake 11:20:08 -41.5 Dark Up 48.8 216.5 Up 11:10:10 - 11:30:06 4901
Chiloquin 11:20:11 -42.4 Dark Up 49.7 215.6 Up 11:10:13 - 11:30:09 4847
Paisley 11:20:06 -41.4 Dark Up 49.1 217.3 Up 11:10:08 - 11:30:04 4846
Klamath Falls 11:20:11 -42.3 Dark Up 50.0 216.0 Up 11:10:13 - 11:30:09 4814
Lakeview 11:20:05 -41.3 Dark Up 49.4 217.9 Up 11:10:07 - 11:30:03 4797
Tulelake 11:20:10 -42.2 Dark Up 50.1 216.6 Up 11:10:12 - 11:30:08 4786
Cedarville 11:20:04 -41.3 Dark Up 49.8 218.7 Up 11:10:06 - 11:30:02 4733
Fall River/Burney 11:20:09 -42.3 Dark Up 50.7 217.4 Up 11:10:11 - 11:30:07 4699
Susanville 11:20:06 -41.8 Dark Up 50.9 218.9 Up 11:10:08 - 11:30:04 4631
Greenville 11:20:06 -42.0 Dark Up 51.3 218.7 Up 11:10:08 - 11:30:04 4607
Gimple 11:20:06 -42.0 Dark Up 51.2 218.8 Up 11:10:08 - 11:30:04 4606
Quincy 11:20:06 -42.1 Dark Up 51.4 218.8 Up 11:10:08 - 11:30:04 4588
Portola 11:20:04 -41.7 Dark Up 51.3 219.6 Up 11:10:06 - 11:30:02 4571
Reno 11:20:02 -41.3 Dark Up 51.2 220.7 Up 11:10:04 - 11:30:00 4539
Carson City 11:20:02 -41.3 Dark Up 51.4 221.0 Up 11:10:04 - 11:30:00 4504
Niwot 11:19:14 -30.2 Dark Up 42.4 237.3 Up 11:09:16 - 11:29:12 4485
Gardnerville 11:20:02 -41.3 Dark Up 51.6 221.3 Up 11:10:04 - 11:30:00 4480
Yerington 11:19:59 -40.8 Dark Up 51.3 222.0 Up 11:10:01 - 11:29:57 4479
Hawthorne 11:19:57 -40.5 Dark Up 51.3 223.1 Up 11:09:59 - 11:29:55 4429
Lee Vining 11:19:59 -40.9 Dark Up 52.0 222.9 Up 11:10:01 - 11:29:57 4378
Tonopah 11:19:52 -39.4 Dark Up 50.9 225.3 Up 11:09:54 - 11:29:50 4370
Bishop 11:19:56 -40.3 Dark Up 52.0 224.4 Up 11:09:58 - 11:29:54 4312
Beatty 11:19:49 -39.1 Dark Up 51.4 226.9 Up 11:09:51 - 11:29:47 4251
Lone Pine 11:19:54 -40.1 Dark Up 52.4 225.5 Up 11:09:56 - 11:29:52 4233
Indian Springs 11:19:45 -38.2 Dark Up 51.0 228.6 Up 11:09:47 - 11:29:43 4209
Henderson 11:19:42 -37.7 Dark Up 51.0 229.9 Up 11:09:44 - 11:29:40 4149
CPSLO 11:20:03 -42.2 Dark Up 54.8 223.3 Up 11:10:05 - 11:30:01 4129
Searchlight/Boulder City 11:19:41 -37.6 Dark Up 51.3 230.6 Up 11:09:43 - 11:29:39 4091
Patrick 11:19:38 -36.8 Dark Up 50.7 231.9 Up 11:09:40 - 11:29:36 4076
Laughlin/Bullhead City 11:19:41 -37.4 Dark Up 51.3 231.3 Up 11:09:43 - 11:29:39 4058
Kingman/Dolan Springs 11:19:39 -36.9 Dark Up 50.9 231.9 Up 11:09:41 - 11:29:37 4055
DCO 11:19:36 -36.2 Dark Up 50.4 233.0 Up 11:09:38 - 11:29:34 4039
Mohave Valley 11:19:41 -37.3 Dark Up 51.4 231.5 Up 11:09:43 - 11:29:39 4030
Lake Havasu City 11:19:39 -37.1 Dark Up 51.5 232.2 Up 11:09:41 - 11:29:37 3987
Wildwood 11:19:55 -40.6 Dark Up 54.4 227.3 Up 11:09:57 - 11:29:53 3986
Parker 11:19:39 -37.1 Dark Up 51.7 232.6 Up 11:09:41 - 11:29:37 3951
Idyllwild 11:19:48 -39.1 Dark Up 53.5 230.1 Up 11:09:50 - 11:29:46 3931
Blythe 11:19:40 -37.3 Dark Up 52.2 232.8 Up 11:09:42 - 11:29:38 3900
Calipatria 11:19:43 -38.1 Dark Up 53.1 232.2 Up 11:09:45 - 11:29:41 3858
Yuma 11:19:40 -37.3 Dark Up 52.8 233.7 Up 11:09:42 - 11:29:38 3805

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 2018/10/24 21:07:38 UT

Marc W. Buie, Southwest Research Institute

RECON