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 11:21:25 UTC

J2000 position of star is 06:08:44.1 +07:25:31
Equinox of date position of star is 06:09:40.5 +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=20.3

[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 80 seconds.
The 1-sigma cross-track error in the shadow position is 1112 km.
The sky-plane scale is 21110.4 km/arcsec.

The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 22.3 sec chord
Diameter=195.4 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 55638, (2018/11/27 11:21UT)
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=0.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:19:29 -39.5 Dark Up 43.6 214.7 Up 11:12:19 - 11:26:38 5889
Tonasket 11:19:29 -39.6 Dark Up 43.8 214.9 Up 11:12:20 - 11:26:39 5868
Okanogan 11:19:29 -39.7 Dark Up 44.1 214.9 Up 11:12:20 - 11:26:39 5840
Brewster 11:19:30 -39.9 Dark Up 44.4 214.7 Up 11:12:20 - 11:26:39 5818
Manson/Chelan 11:19:30 -40.2 Dark Up 44.8 214.4 Up 11:12:21 - 11:26:40 5802
Entiat 11:19:30 -40.3 Dark Up 45.0 214.4 Up 11:12:20 - 11:26:39 5784
Wenatchee 11:19:31 -40.4 Dark Up 45.2 214.4 Up 11:12:22 - 11:26:41 5762
Ellensburg 11:19:31 -40.7 Dark Up 45.6 214.4 Up 11:12:22 - 11:26:41 5727
Yakima 11:19:31 -40.8 Dark Up 46.0 214.6 Up 11:12:22 - 11:26:41 5691
Toppenish/White Swan 11:19:30 -40.7 Dark Up 46.1 215.0 Up 11:12:21 - 11:26:40 5670
Pasco 11:19:26 -39.9 Dark Up 45.7 216.7 Up 11:12:16 - 11:26:35 5648
PNWRO 11:19:25 -39.8 Dark Up 45.8 217.1 Up 11:12:15 - 11:26:34 5624
Goldendale 11:19:31 -41.1 Dark Up 46.7 214.7 Up 11:12:22 - 11:26:41 5624
George/Umatilla 11:19:27 -40.1 Dark Up 46.0 216.6 Up 11:12:17 - 11:26:36 5619
The Dalles 11:19:32 -41.4 Dark Up 47.0 214.4 Up 11:12:22 - 11:26:41 5606
Maupin 11:19:32 -41.4 Dark Up 47.3 214.8 Up 11:12:22 - 11:26:41 5568
Madras/Culver 11:19:32 -41.6 Dark Up 47.8 215.1 Up 11:12:22 - 11:26:41 5518
Sisters 11:19:33 -41.9 Dark Up 48.3 214.7 Up 11:12:23 - 11:26:42 5492
Redmond 11:19:31 -41.7 Dark Up 48.1 215.2 Up 11:12:22 - 11:26:41 5486
Bend 11:19:32 -41.8 Dark Up 48.4 215.2 Up 11:12:22 - 11:26:41 5467
Oregon Observatory 11:19:32 -41.9 Dark Up 48.5 215.1 Up 11:12:23 - 11:26:42 5453
La Pine/Gilchrist 11:19:32 -42.0 Dark Up 48.7 215.2 Up 11:12:23 - 11:26:42 5434
North Lake 11:19:30 -41.7 Dark Up 48.8 216.3 Up 11:12:20 - 11:26:39 5388
Chiloquin 11:19:32 -42.5 Dark Up 49.8 215.4 Up 11:12:23 - 11:26:42 5334
Paisley 11:19:28 -41.5 Dark Up 49.1 217.1 Up 11:12:19 - 11:26:38 5333
Klamath Falls 11:19:32 -42.5 Dark Up 50.0 215.8 Up 11:12:23 - 11:26:42 5301
Lakeview 11:19:27 -41.4 Dark Up 49.4 217.7 Up 11:12:17 - 11:26:36 5284
Tulelake 11:19:31 -42.3 Dark Up 50.1 216.4 Up 11:12:22 - 11:26:41 5273
Cedarville 11:19:26 -41.4 Dark Up 49.9 218.4 Up 11:12:17 - 11:26:36 5220
Fall River/Burney 11:19:30 -42.4 Dark Up 50.8 217.1 Up 11:12:20 - 11:26:39 5185
Susanville 11:19:28 -41.9 Dark Up 51.0 218.6 Up 11:12:18 - 11:26:37 5118
Greenville 11:19:28 -42.2 Dark Up 51.3 218.4 Up 11:12:19 - 11:26:38 5094
Gimple 11:19:28 -42.1 Dark Up 51.3 218.6 Up 11:12:18 - 11:26:37 5093
Quincy 11:19:28 -42.2 Dark Up 51.5 218.6 Up 11:12:19 - 11:26:38 5075
Portola 11:19:26 -41.9 Dark Up 51.4 219.4 Up 11:12:17 - 11:26:36 5058
Reno 11:19:23 -41.4 Dark Up 51.3 220.4 Up 11:12:13 - 11:26:32 5026
Carson City 11:19:23 -41.4 Dark Up 51.5 220.8 Up 11:12:14 - 11:26:33 4991
Niwot 11:18:35 -30.3 Dark Up 42.5 237.1 Up 11:11:25 - 11:25:44 4973
Gardnerville 11:19:23 -41.4 Dark Up 51.7 221.0 Up 11:12:14 - 11:26:33 4967
Yerington 11:19:21 -40.9 Dark Up 51.3 221.8 Up 11:12:12 - 11:26:31 4966
Hawthorne 11:19:19 -40.6 Dark Up 51.4 222.9 Up 11:12:09 - 11:26:28 4916
Lee Vining 11:19:21 -41.0 Dark Up 52.1 222.7 Up 11:12:11 - 11:26:30 4865
Tonopah 11:19:14 -39.5 Dark Up 51.0 225.1 Up 11:12:04 - 11:26:23 4857
Bishop 11:19:17 -40.5 Dark Up 52.1 224.2 Up 11:12:08 - 11:26:27 4799
Beatty 11:19:11 -39.2 Dark Up 51.5 226.7 Up 11:12:02 - 11:26:21 4738
Lone Pine 11:19:15 -40.2 Dark Up 52.5 225.3 Up 11:12:06 - 11:26:25 4720
Indian Springs 11:19:07 -38.4 Dark Up 51.1 228.4 Up 11:11:57 - 11:26:16 4695
Henderson 11:19:03 -37.8 Dark Up 51.1 229.7 Up 11:11:54 - 11:26:13 4636
CPSLO 11:19:25 -42.4 Dark Up 54.9 223.0 Up 11:12:15 - 11:26:34 4616
Searchlight/Boulder City 11:19:03 -37.8 Dark Up 51.4 230.4 Up 11:11:54 - 11:26:13 4578
Patrick 11:19:00 -36.9 Dark Up 50.8 231.7 Up 11:11:51 - 11:26:10 4563
Laughlin/Bullhead City 11:19:03 -37.5 Dark Up 51.4 231.1 Up 11:11:53 - 11:26:12 4544
Kingman/Dolan Springs 11:19:01 -37.1 Dark Up 51.0 231.7 Up 11:11:51 - 11:26:10 4542
DCO 11:18:58 -36.3 Dark Up 50.5 232.8 Up 11:11:48 - 11:26:07 4526
Mohave Valley 11:19:02 -37.5 Dark Up 51.5 231.3 Up 11:11:53 - 11:26:12 4516
Lake Havasu City 11:19:01 -37.3 Dark Up 51.6 232.0 Up 11:11:51 - 11:26:10 4474
Wildwood 11:19:17 -40.7 Dark Up 54.5 227.1 Up 11:12:07 - 11:26:26 4473
Parker 11:19:01 -37.2 Dark Up 51.8 232.4 Up 11:11:52 - 11:26:11 4438
Idyllwild 11:19:09 -39.2 Dark Up 53.6 229.9 Up 11:12:00 - 11:26:19 4418
Blythe 11:19:01 -37.5 Dark Up 52.3 232.6 Up 11:11:51 - 11:26:10 4387
Calipatria 11:19:04 -38.2 Dark Up 53.2 232.0 Up 11:11:55 - 11:26:14 4344
Yuma 11:19:01 -37.5 Dark Up 52.9 233.5 Up 11:11:52 - 11:26:11 4292

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 11:21UT)
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 2017/05/19 18:06:57 UT

Marc W. Buie, Southwest Research Institute

RECON