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 06:09:42.3 +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 101 seconds.
The 1-sigma cross-track error in the shadow position is 1165 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 21.7 km RECON observability=1.0 and success probability=0.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:19:30 -39.5 Dark Up 43.6 214.7 Up 11:10:34 - 11:28:26 5891
Tonasket 11:19:30 -39.6 Dark Up 43.8 214.9 Up 11:10:34 - 11:28:26 5870
Okanogan 11:19:30 -39.7 Dark Up 44.1 214.9 Up 11:10:34 - 11:28:26 5842
Brewster 11:19:30 -39.9 Dark Up 44.4 214.7 Up 11:10:34 - 11:28:26 5820
Manson/Chelan 11:19:32 -40.2 Dark Up 44.7 214.4 Up 11:10:36 - 11:28:28 5805
Entiat 11:19:32 -40.3 Dark Up 45.0 214.4 Up 11:10:36 - 11:28:28 5786
Wenatchee 11:19:32 -40.4 Dark Up 45.2 214.4 Up 11:10:36 - 11:28:28 5764
Ellensburg 11:19:32 -40.7 Dark Up 45.6 214.4 Up 11:10:36 - 11:28:28 5729
Yakima 11:19:32 -40.8 Dark Up 46.0 214.6 Up 11:10:36 - 11:28:28 5693
Toppenish/White Swan 11:19:31 -40.7 Dark Up 46.1 215.0 Up 11:10:35 - 11:28:27 5672
Pasco 11:19:27 -39.9 Dark Up 45.7 216.7 Up 11:10:31 - 11:28:23 5650
Goldendale 11:19:32 -41.1 Dark Up 46.7 214.7 Up 11:10:36 - 11:28:28 5626
PNWRO 11:19:26 -39.8 Dark Up 45.8 217.1 Up 11:10:30 - 11:28:22 5626
George/Umatilla 11:19:27 -40.1 Dark Up 46.0 216.6 Up 11:10:31 - 11:28:23 5622
The Dalles 11:19:33 -41.4 Dark Up 47.0 214.4 Up 11:10:37 - 11:28:29 5609
Maupin 11:19:33 -41.4 Dark Up 47.3 214.8 Up 11:10:37 - 11:28:29 5570
Madras/Culver 11:19:33 -41.6 Dark Up 47.8 215.1 Up 11:10:37 - 11:28:29 5520
Sisters 11:19:34 -41.9 Dark Up 48.3 214.7 Up 11:10:38 - 11:28:30 5494
Redmond 11:19:32 -41.7 Dark Up 48.1 215.2 Up 11:10:36 - 11:28:28 5488
Bend 11:19:33 -41.8 Dark Up 48.3 215.2 Up 11:10:37 - 11:28:29 5469
Oregon Observatory 11:19:32 -41.9 Dark Up 48.5 215.1 Up 11:10:36 - 11:28:28 5455
La Pine/Gilchrist 11:19:33 -42.0 Dark Up 48.7 215.2 Up 11:10:37 - 11:28:29 5436
North Lake 11:19:31 -41.7 Dark Up 48.8 216.3 Up 11:10:35 - 11:28:27 5390
Chiloquin 11:19:33 -42.5 Dark Up 49.8 215.4 Up 11:10:37 - 11:28:29 5336
Paisley 11:19:29 -41.5 Dark Up 49.1 217.1 Up 11:10:33 - 11:28:25 5335
Klamath Falls 11:19:34 -42.5 Dark Up 50.0 215.8 Up 11:10:38 - 11:28:30 5303
Lakeview 11:19:28 -41.4 Dark Up 49.4 217.7 Up 11:10:32 - 11:28:24 5286
Tulelake 11:19:32 -42.3 Dark Up 50.1 216.4 Up 11:10:36 - 11:28:28 5275
Cedarville 11:19:27 -41.4 Dark Up 49.9 218.5 Up 11:10:31 - 11:28:23 5222
Fall River/Burney 11:19:31 -42.4 Dark Up 50.8 217.1 Up 11:10:35 - 11:28:27 5188
Susanville 11:19:28 -41.9 Dark Up 51.0 218.6 Up 11:10:32 - 11:28:24 5120
Greenville 11:19:29 -42.2 Dark Up 51.3 218.4 Up 11:10:33 - 11:28:25 5097
Gimple 11:19:29 -42.1 Dark Up 51.3 218.6 Up 11:10:33 - 11:28:25 5096
Quincy 11:19:29 -42.2 Dark Up 51.5 218.6 Up 11:10:33 - 11:28:25 5077
Portola 11:19:28 -41.8 Dark Up 51.4 219.4 Up 11:10:32 - 11:28:24 5060
Reno 11:19:25 -41.4 Dark Up 51.2 220.5 Up 11:10:29 - 11:28:21 5028
Carson City 11:19:25 -41.4 Dark Up 51.5 220.8 Up 11:10:29 - 11:28:21 4993
Niwot 11:18:37 -30.3 Dark Up 42.5 237.1 Up 11:09:41 - 11:27:33 4973
Gardnerville 11:19:24 -41.4 Dark Up 51.7 221.0 Up 11:10:28 - 11:28:20 4969
Yerington 11:19:22 -40.9 Dark Up 51.3 221.8 Up 11:10:26 - 11:28:18 4968
Hawthorne 11:19:21 -40.6 Dark Up 51.4 222.9 Up 11:10:25 - 11:28:17 4918
Lee Vining 11:19:22 -41.0 Dark Up 52.1 222.7 Up 11:10:26 - 11:28:18 4867
Tonopah 11:19:15 -39.5 Dark Up 51.0 225.1 Up 11:10:19 - 11:28:11 4859
Bishop 11:19:19 -40.5 Dark Up 52.1 224.2 Up 11:10:23 - 11:28:15 4801
Beatty 11:19:12 -39.2 Dark Up 51.5 226.7 Up 11:10:16 - 11:28:08 4740
Lone Pine 11:19:17 -40.2 Dark Up 52.5 225.3 Up 11:10:21 - 11:28:13 4722
Indian Springs 11:19:08 -38.4 Dark Up 51.1 228.4 Up 11:10:12 - 11:28:04 4698
Henderson 11:19:06 -37.8 Dark Up 51.1 229.8 Up 11:10:10 - 11:28:02 4638
CPSLO 11:19:26 -42.4 Dark Up 54.9 223.0 Up 11:10:30 - 11:28:22 4618
Searchlight/Boulder City 11:19:04 -37.8 Dark Up 51.4 230.4 Up 11:10:08 - 11:28:00 4580
Patrick 11:19:01 -36.9 Dark Up 50.8 231.7 Up 11:10:05 - 11:27:57 4565
Laughlin/Bullhead City 11:19:03 -37.5 Dark Up 51.4 231.1 Up 11:10:07 - 11:27:59 4547
Kingman/Dolan Springs 11:19:02 -37.1 Dark Up 51.0 231.7 Up 11:10:06 - 11:27:58 4544
DCO 11:18:58 -36.3 Dark Up 50.5 232.8 Up 11:10:02 - 11:27:54 4528
Mohave Valley 11:19:03 -37.5 Dark Up 51.5 231.4 Up 11:10:07 - 11:27:59 4519
Lake Havasu City 11:19:02 -37.3 Dark Up 51.6 232.0 Up 11:10:06 - 11:27:58 4476
Wildwood 11:19:18 -40.7 Dark Up 54.5 227.1 Up 11:10:22 - 11:28:14 4475
Parker 11:19:02 -37.2 Dark Up 51.8 232.4 Up 11:10:06 - 11:27:58 4440
Idyllwild 11:19:11 -39.2 Dark Up 53.6 229.9 Up 11:10:15 - 11:28:07 4420
Blythe 11:19:03 -37.5 Dark Up 52.3 232.6 Up 11:10:07 - 11:27:59 4389
Calipatria 11:19:06 -38.2 Dark Up 53.2 232.0 Up 11:10:10 - 11:28:02 4347
Yuma 11:19:03 -37.4 Dark Up 52.9 233.5 Up 11:10:07 - 11:27:59 4294

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 2017/12/05 19:04:31 UT

Marc W. Buie, Southwest Research Institute

RECON