RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star GA0960:01178375 with event index number of 178026

Geocentric closest approach at 2019/01/11 03:27:38 UTC

J2000 position of star is 06:03:55.0 +07:23:08
Equinox of date position of star is 06:04:54.9 +07:23:01
Stellar brightness G=14.8, use SENSEUP=128
Star is 104 degrees from the moon. Moon is 22% 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 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 79 seconds.
The 1-sigma cross-track error in the shadow position is 1066 km.
The sky-plane scale is 21094.7 km/arcsec.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 23.0 sec chord
Diameter=214.3 km assuming a 30% albedo -- 9.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 55638, (2019/01/11 03:28UT)
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 22.1 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 03:29:19 -29.8 Dark Up 32.0 119.9 Up 03:22:14 - 03:36:25 10244
Oroville 03:29:20 -29.9 Dark Up 32.4 119.7 Up 03:22:14 - 03:36:25 10193
Tonasket 03:29:20 -29.9 Dark Up 32.5 119.6 Up 03:22:15 - 03:36:26 10173
Okanogan 03:29:22 -29.8 Dark Up 32.6 119.3 Up 03:22:16 - 03:36:27 10144
Brewster 03:29:23 -29.7 Dark Up 32.6 118.9 Up 03:22:17 - 03:36:28 10121
Manson/Chelan 03:29:25 -29.5 Dark Up 32.5 118.5 Up 03:22:19 - 03:36:30 10103
Entiat 03:29:24 -29.4 Dark Up 32.5 118.3 Up 03:22:19 - 03:36:30 10084
Wenatchee 03:29:25 -29.3 Dark Up 32.6 118.0 Up 03:22:20 - 03:36:31 10062
Ellensburg 03:29:27 -29.2 Dark Up 32.7 117.6 Up 03:22:22 - 03:36:33 10026
Yakima 03:29:28 -29.2 Dark Up 32.8 117.4 Up 03:22:23 - 03:36:34 9990
Toppenish/White Swan 03:29:28 -29.3 Dark Up 33.0 117.4 Up 03:22:22 - 03:36:33 9971
Pasco 03:29:25 -30.1 Dark Up 33.9 118.5 Up 03:22:20 - 03:36:31 9957
PNWRO 03:29:26 -30.3 Dark Up 34.1 118.6 Up 03:22:20 - 03:36:31 9935
George/Umatilla 03:29:27 -30.0 Dark Up 33.9 118.1 Up 03:22:21 - 03:36:32 9928
Goldendale 03:29:30 -29.0 Dark Up 33.0 116.7 Up 03:22:25 - 03:36:36 9922
The Dalles 03:29:32 -28.7 Dark Up 32.9 116.2 Up 03:22:26 - 03:36:37 9903
Maupin 03:29:32 -28.8 Dark Up 33.2 116.1 Up 03:22:27 - 03:36:38 9865
Madras/Culver 03:29:33 -28.7 Dark Up 33.4 115.7 Up 03:22:28 - 03:36:39 9815
Sisters 03:29:35 -28.4 Dark Up 33.2 115.1 Up 03:22:30 - 03:36:41 9786
Redmond 03:29:34 -28.7 Dark Up 33.5 115.5 Up 03:22:29 - 03:36:40 9783
Bend 03:29:35 -28.5 Dark Up 33.5 115.2 Up 03:22:29 - 03:36:40 9764
Oregon Observatory 03:29:36 -28.4 Dark Up 33.5 115.0 Up 03:22:30 - 03:36:41 9748
La Pine/Gilchrist 03:29:37 -28.4 Dark Up 33.5 114.8 Up 03:22:32 - 03:36:43 9730
North Lake 03:29:36 -28.8 Dark Up 34.1 115.1 Up 03:22:30 - 03:36:41 9688
Paisley 03:29:36 -29.0 Dark Up 34.6 115.1 Up 03:22:30 - 03:36:41 9636
Chiloquin 03:29:40 -28.1 Dark Up 33.8 113.8 Up 03:22:34 - 03:36:45 9628
Klamath Falls 03:29:41 -28.1 Dark Up 34.0 113.7 Up 03:22:35 - 03:36:46 9596
Lakeview 03:29:36 -29.1 Dark Up 34.9 114.9 Up 03:22:30 - 03:36:41 9589
Tulelake 03:29:40 -28.3 Dark Up 34.3 113.8 Up 03:22:35 - 03:36:46 9570
Cedarville 03:29:37 -29.2 Dark Up 35.3 114.7 Up 03:22:32 - 03:36:43 9527
Fall River/Burney 03:29:41 -28.3 Dark Up 34.7 113.3 Up 03:22:36 - 03:36:47 9484
Susanville 03:29:41 -28.8 Dark Up 35.5 113.5 Up 03:22:36 - 03:36:47 9422
Greenville 03:29:42 -28.5 Dark Up 35.4 113.1 Up 03:22:37 - 03:36:48 9397
Gimple 03:29:42 -28.6 Dark Up 35.4 113.2 Up 03:22:36 - 03:36:47 9396
Niwot 03:28:58 -40.4 Dark Up 45.6 128.4 Up 03:21:53 - 03:36:04 9387
Quincy 03:29:42 -28.5 Dark Up 35.4 113.0 Up 03:22:37 - 03:36:48 9377
Portola 03:29:41 -28.9 Dark Up 35.8 113.3 Up 03:22:36 - 03:36:47 9364
Reno 03:29:41 -29.3 Dark Up 36.4 113.7 Up 03:22:35 - 03:36:46 9337
Carson City 03:29:41 -29.3 Dark Up 36.6 113.5 Up 03:22:36 - 03:36:47 9303
Yerington 03:29:40 -29.8 Dark Up 37.1 113.9 Up 03:22:35 - 03:36:46 9283
Gardnerville 03:29:42 -29.3 Dark Up 36.7 113.3 Up 03:22:36 - 03:36:47 9279
Hawthorne 03:29:39 -30.2 Dark Up 37.6 114.0 Up 03:22:34 - 03:36:45 9237
Tonopah 03:29:37 -31.2 Dark Up 38.8 114.9 Up 03:22:31 - 03:36:42 9189
Lee Vining 03:29:42 -29.7 Dark Up 37.5 113.2 Up 03:22:36 - 03:36:47 9182
Bishop 03:29:41 -30.2 Dark Up 38.3 113.4 Up 03:22:36 - 03:36:47 9123
Beatty 03:29:37 -31.5 Dark Up 39.7 114.4 Up 03:22:32 - 03:36:43 9075
Lone Pine 03:29:41 -30.4 Dark Up 38.8 113.1 Up 03:22:36 - 03:36:47 9047
Indian Springs 03:29:34 -32.3 Dark Up 40.6 115.1 Up 03:22:29 - 03:36:40 9041
Henderson 03:29:33 -32.8 Dark Up 41.3 115.3 Up 03:22:27 - 03:36:38 8987
Searchlight/Boulder City 03:29:34 -32.8 Dark Up 41.6 114.9 Up 03:22:28 - 03:36:39 8930
Patrick 03:29:31 -33.7 Dark Up 42.4 115.8 Up 03:22:26 - 03:36:37 8924
CPSLO 03:29:50 -28.2 Dark Up 37.4 110.1 Up 03:22:44 - 03:36:55 8924
Kingman/Dolan Springs 03:29:32 -33.5 Dark Up 42.3 115.5 Up 03:22:26 - 03:36:37 8902
Laughlin/Bullhead City 03:29:34 -33.1 Dark Up 42.0 115.0 Up 03:22:28 - 03:36:39 8900
DCO 03:29:29 -34.2 Dark Up 43.0 116.2 Up 03:22:24 - 03:36:35 8893
Mohave Valley 03:29:33 -33.1 Dark Up 42.1 114.8 Up 03:22:28 - 03:36:39 8873
Lake Havasu City 03:29:34 -33.2 Dark Up 42.5 114.7 Up 03:22:29 - 03:36:40 8832
Wildwood 03:29:46 -29.7 Dark Up 39.4 110.8 Up 03:22:41 - 03:36:52 8798
Parker 03:29:34 -33.2 Dark Up 42.6 114.4 Up 03:22:29 - 03:36:40 8797
Idyllwild 03:29:42 -31.2 Dark Up 41.0 112.0 Up 03:22:37 - 03:36:48 8758
Blythe 03:29:36 -32.9 Dark Up 42.6 113.7 Up 03:22:30 - 03:36:41 8744
Calipatria 03:29:40 -32.1 Dark Up 42.1 112.5 Up 03:22:34 - 03:36:45 8695
Yuma 03:29:37 -32.8 Dark Up 43.0 112.9 Up 03:22:32 - 03:36:43 8650

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 03:28UT)
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 2018/06/11 19:31:48 UT

Marc W. Buie, Southwest Research Institute

RECON