RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star UC4-487-016786 with event index number of 178026

Geocentric closest approach at 2019/01/11 03:26:47 UTC

J2000 position of star is 06:03:55.0 +07:23:08
Equinox of date position of star is 06:04:51.4 +07:23:01
Stellar brightness R=14.8, use SENSEUP=128
Star is 104 degrees from the moon. Moon is 21% 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 22.8 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 77 seconds.
The 1-sigma cross-track error in the shadow position is 1066 km.
The sky-plane scale is 21094.8 km/arcsec.

The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 21.0 sec chord
Diameter=195.4 km assuming a 30% albedo -- 8.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 55638, (2019/01/11 03:27UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.2 +07:24:33  0.4  2.17 101
Bellatrix      05:26:09.2 +06:21:55  1.6  9.68  94
63 Ori         06:05:59.1 +05:25:02  6.4  1.98 104
PPM 149822     06:04:11.9 +07:37:31  8.0  0.30 103
PPM 149836     06:04:43.9 +07:11:21  9.7  0.20 104
55638          06:04:56.8 +07:23:00 14.8       104
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 21.0 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 03:29:23 -29.9 Dark Up 32.4 119.7 Up 03:22:26 - 03:36:20 6217
Tonasket 03:29:24 -29.9 Dark Up 32.5 119.6 Up 03:22:27 - 03:36:21 6197
Okanogan 03:29:25 -29.9 Dark Up 32.6 119.3 Up 03:22:28 - 03:36:22 6168
Brewster 03:29:27 -29.7 Dark Up 32.6 118.9 Up 03:22:30 - 03:36:24 6145
Manson/Chelan 03:29:28 -29.5 Dark Up 32.5 118.5 Up 03:22:31 - 03:36:25 6128
Entiat 03:29:28 -29.4 Dark Up 32.5 118.3 Up 03:22:31 - 03:36:25 6109
Wenatchee 03:29:29 -29.4 Dark Up 32.6 118.0 Up 03:22:32 - 03:36:26 6087
Ellensburg 03:29:30 -29.2 Dark Up 32.7 117.6 Up 03:22:33 - 03:36:27 6051
Yakima 03:29:31 -29.2 Dark Up 32.8 117.4 Up 03:22:34 - 03:36:28 6015
Toppenish/White Swan 03:29:32 -29.3 Dark Up 33.0 117.4 Up 03:22:35 - 03:36:29 5995
Pasco 03:29:29 -30.2 Dark Up 33.9 118.5 Up 03:22:32 - 03:36:26 5982
PNWRO 03:29:29 -30.3 Dark Up 34.1 118.6 Up 03:22:32 - 03:36:26 5960
George/Umatilla 03:29:30 -30.0 Dark Up 33.9 118.1 Up 03:22:33 - 03:36:27 5953
Goldendale 03:29:34 -29.0 Dark Up 33.0 116.7 Up 03:22:37 - 03:36:31 5947
The Dalles 03:29:35 -28.7 Dark Up 32.9 116.2 Up 03:22:38 - 03:36:32 5927
Maupin 03:29:36 -28.8 Dark Up 33.2 116.1 Up 03:22:39 - 03:36:33 5890
Madras/Culver 03:29:37 -28.7 Dark Up 33.4 115.7 Up 03:22:40 - 03:36:34 5840
Sisters 03:29:39 -28.4 Dark Up 33.2 115.1 Up 03:22:42 - 03:36:36 5811
Redmond 03:29:38 -28.7 Dark Up 33.5 115.5 Up 03:22:41 - 03:36:35 5808
Bend 03:29:39 -28.6 Dark Up 33.5 115.2 Up 03:22:42 - 03:36:36 5789
Oregon Observatory 03:29:40 -28.5 Dark Up 33.5 115.0 Up 03:22:43 - 03:36:37 5773
La Pine/Gilchrist 03:29:40 -28.4 Dark Up 33.5 114.8 Up 03:22:43 - 03:36:37 5755
North Lake 03:29:40 -28.8 Dark Up 34.1 115.1 Up 03:22:43 - 03:36:37 5713
Paisley 03:29:40 -29.0 Dark Up 34.6 115.1 Up 03:22:43 - 03:36:37 5662
Chiloquin 03:29:43 -28.1 Dark Up 33.8 113.8 Up 03:22:46 - 03:36:40 5653
Klamath Falls 03:29:44 -28.1 Dark Up 34.0 113.7 Up 03:22:47 - 03:36:41 5621
Lakeview 03:29:41 -29.1 Dark Up 34.9 114.9 Up 03:22:44 - 03:36:38 5614
Tulelake 03:29:44 -28.3 Dark Up 34.3 113.8 Up 03:22:47 - 03:36:41 5595
Cedarville 03:29:41 -29.2 Dark Up 35.3 114.7 Up 03:22:44 - 03:36:38 5552
Fall River/Burney 03:29:46 -28.3 Dark Up 34.7 113.3 Up 03:22:49 - 03:36:43 5509
Susanville 03:29:45 -28.8 Dark Up 35.5 113.5 Up 03:22:48 - 03:36:42 5447
Greenville 03:29:46 -28.5 Dark Up 35.4 113.1 Up 03:22:49 - 03:36:43 5422
Gimple 03:29:46 -28.6 Dark Up 35.4 113.2 Up 03:22:49 - 03:36:43 5421
Niwot 03:29:02 -40.5 Dark Up 45.7 128.4 Up 03:22:05 - 03:35:59 5414
Quincy 03:29:47 -28.5 Dark Up 35.5 113.0 Up 03:22:50 - 03:36:44 5402
Portola 03:29:45 -28.9 Dark Up 35.8 113.3 Up 03:22:48 - 03:36:42 5389
Reno 03:29:45 -29.3 Dark Up 36.4 113.7 Up 03:22:48 - 03:36:42 5362
Carson City 03:29:45 -29.3 Dark Up 36.6 113.5 Up 03:22:48 - 03:36:42 5328
Yerington 03:29:44 -29.8 Dark Up 37.1 113.9 Up 03:22:47 - 03:36:41 5308
Gardnerville 03:29:46 -29.3 Dark Up 36.7 113.3 Up 03:22:49 - 03:36:43 5304
Hawthorne 03:29:43 -30.2 Dark Up 37.7 114.0 Up 03:22:46 - 03:36:40 5262
Tonopah 03:29:41 -31.2 Dark Up 38.9 114.9 Up 03:22:44 - 03:36:38 5214
Lee Vining 03:29:45 -29.7 Dark Up 37.5 113.2 Up 03:22:48 - 03:36:42 5208
Bishop 03:29:45 -30.2 Dark Up 38.3 113.4 Up 03:22:48 - 03:36:42 5148
Beatty 03:29:41 -31.5 Dark Up 39.7 114.5 Up 03:22:44 - 03:36:38 5100
Lone Pine 03:29:45 -30.4 Dark Up 38.8 113.1 Up 03:22:48 - 03:36:42 5072
Indian Springs 03:29:38 -32.3 Dark Up 40.6 115.1 Up 03:22:41 - 03:36:35 5066
Henderson 03:29:37 -32.8 Dark Up 41.3 115.3 Up 03:22:40 - 03:36:34 5012
Searchlight/Boulder City 03:29:38 -32.8 Dark Up 41.6 114.9 Up 03:22:41 - 03:36:35 4955
Patrick 03:29:35 -33.7 Dark Up 42.4 115.8 Up 03:22:38 - 03:36:32 4949
CPSLO 03:29:54 -28.2 Dark Up 37.4 110.1 Up 03:22:57 - 03:36:51 4948
Kingman/Dolan Springs 03:29:36 -33.5 Dark Up 42.4 115.5 Up 03:22:39 - 03:36:33 4927
Laughlin/Bullhead City 03:29:37 -33.1 Dark Up 42.0 115.0 Up 03:22:40 - 03:36:34 4925
DCO 03:29:33 -34.2 Dark Up 43.1 116.2 Up 03:22:36 - 03:36:30 4918
Mohave Valley 03:29:37 -33.1 Dark Up 42.1 114.8 Up 03:22:40 - 03:36:34 4898
Lake Havasu City 03:29:37 -33.2 Dark Up 42.5 114.7 Up 03:22:40 - 03:36:34 4857
Wildwood 03:29:50 -29.7 Dark Up 39.4 110.8 Up 03:22:53 - 03:36:47 4822
Parker 03:29:38 -33.2 Dark Up 42.6 114.4 Up 03:22:41 - 03:36:35 4822
Idyllwild 03:29:45 -31.2 Dark Up 41.0 112.0 Up 03:22:48 - 03:36:42 4784
Blythe 03:29:39 -32.9 Dark Up 42.6 113.7 Up 03:22:42 - 03:36:36 4769
Calipatria 03:29:43 -32.1 Dark Up 42.1 112.5 Up 03:22:46 - 03:36:40 4720
Yuma 03:29:41 -32.8 Dark Up 43.0 112.9 Up 03:22:44 - 03:36:38 4675

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, (2019/01/11 03:27UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.17 101
Bellatrix      05:25:07.8 +06:20:58  1.6  9.68  94
63 Ori         06:04:58.1 +05:25:12  6.4  1.98 104
PPM 149822     06:03:10.0 +07:37:37  8.0  0.30 103
PPM 149836     06:03:42.2 +07:11:28  9.7  0.20 104
55638          06:03:55.0 +07:23:08 14.8       104
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:08:30 UT

Marc W. Buie, Southwest Research Institute

RECON