RECON: TNO occultation with 310071

Event between (310071) 10KR59 and star UC4-383-067675 with event index number of 114554

Geocentric closest approach at 2018/04/26 11:23:46 UTC

J2000 position of star is 14:40:20.4 -13:29:50
Equinox of date position of star is 14:41:20.1 -13:34:28
Stellar brightness R=17.0, use SENSEUP=128
Star is 50 degrees from the moon. Moon is 86% illuminated.
TNO apparent brightness V=19.7

[RECON map]
TNO is 16.5 AU from the Sun and 15.5 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 7.0 arcsec/hr.
The 1-sigma error in the time of the event is 66 seconds.
The 1-sigma cross-track error in the shadow position is 1194 km.
The sky-plane scale is 11273.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=182.0 km assuming a 5% albedo -- 8.3 sec chord
Diameter=74.3 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 310071, (2018/04/26 11:24UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:09.6 -11:15:23  1.0 18.50  32
27Bet Lib      15:17:59.7 -09:26:58  2.6  9.88  57
PPM 229046     14:37:58.4 -12:22:57  6.2  1.45  49
PPM 229140     14:42:19.1 -14:00:22  8.5  0.49  50
PPM 229092     14:40:17.3 -13:45:49  9.5  0.32  50
310071         14:41:20.5 -13:34:30 17.0        50
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 14.8 km RECON observability=0.7 and success probability=1.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:22:19 -12.6 AT Up 15.8 226.1 Really Low 11:16:20 - 11:28:17 4704
Tonasket 11:22:18 -12.8 AT Up 15.9 226.1 Really Low 11:16:19 - 11:28:16 4694
Okanogan 11:22:17 -13.1 AT Up 16.3 226.1 Really Low 11:16:19 - 11:28:16 4679
Brewster 11:22:17 -13.3 AT Up 16.5 225.9 Really Low 11:16:19 - 11:28:16 4666
Manson/Chelan 11:22:17 -13.7 AT Up 16.9 225.7 Really Low 11:16:19 - 11:28:16 4657
Entiat 11:22:17 -13.8 AT Up 17.0 225.6 Really Low 11:16:18 - 11:28:15 4647
Wenatchee 11:22:16 -14.1 AT Up 17.3 225.6 Really Low 11:16:18 - 11:28:15 4635
Ellensburg 11:22:15 -14.4 AT Up 17.7 225.5 Really Low 11:16:17 - 11:28:14 4616
Yakima 11:22:15 -14.7 AT Up 18.0 225.6 Really Low 11:16:16 - 11:28:13 4596
Toppenish/White Swan 11:22:13 -14.8 AT Up 18.0 225.8 Really Low 11:16:15 - 11:28:12 4585
Pasco 11:22:10 -14.2 AT Up 17.5 226.9 Really Low 11:16:11 - 11:28:08 4576
PNWRO 11:22:08 -14.2 AT Up 17.5 227.2 Really Low 11:16:10 - 11:28:07 4563
George/Umatilla 11:22:09 -14.5 AT Up 17.8 226.8 Really Low 11:16:11 - 11:28:08 4560
Goldendale 11:22:13 -15.3 AT Up 18.6 225.5 Really Low 11:16:14 - 11:28:11 4559
The Dalles 11:22:13 -15.7 AT Up 19.0 225.3 Really Low 11:16:14 - 11:28:11 4548
Maupin 11:22:11 -15.9 AT Up 19.2 225.5 Really Low 11:16:13 - 11:28:10 4526
Madras/Culver 11:22:10 -16.3 AT Up 19.6 225.6 Really Low 11:16:11 - 11:28:08 4498
Sisters 11:22:10 -16.7 AT Up 20.1 225.2 Low 11:16:12 - 11:28:09 4481
Redmond 11:22:09 -16.5 AT Up 19.9 225.6 Really Low 11:16:10 - 11:28:07 4479
Bend 11:22:09 -16.7 AT Up 20.1 225.5 Low 11:16:10 - 11:28:07 4468
Oregon Observatory 11:22:08 -16.9 AT Up 20.3 225.5 Low 11:16:10 - 11:28:07 4459
La Pine/Gilchrist 11:22:08 -17.1 AT Up 20.5 225.5 Low 11:16:09 - 11:28:06 4448
North Lake 11:22:05 -17.0 AT Up 20.5 226.1 Low 11:16:07 - 11:28:04 4424
Paisley 11:22:03 -17.2 AT Up 20.7 226.5 Low 11:16:04 - 11:28:01 4392
Chiloquin 11:22:06 -18.0 AT Up 21.5 225.4 Low 11:16:08 - 11:28:05 4388
Klamath Falls 11:22:05 -18.2 Dark Up 21.7 225.6 Low 11:16:06 - 11:28:03 4368
Lakeview 11:22:01 -17.4 AT Up 20.9 226.8 Low 11:16:02 - 11:27:59 4364
Tulelake 11:22:03 -18.2 Dark Up 21.7 225.9 Low 11:16:05 - 11:28:02 4353
Cedarville 11:21:59 -17.7 AT Up 21.3 227.2 Low 11:16:00 - 11:27:57 4326
Fall River/Burney 11:22:00 -18.7 Dark Up 22.3 226.3 Low 11:16:02 - 11:27:59 4300
Susanville 11:21:57 -18.6 Dark Up 22.3 227.1 Low 11:15:58 - 11:27:55 4262
Greenville 11:21:57 -19.0 Dark Up 22.7 226.9 Low 11:15:58 - 11:27:55 4246
Gimple 11:21:57 -18.9 Dark Up 22.6 227.0 Low 11:15:58 - 11:27:55 4245
Quincy 11:21:56 -19.1 Dark Up 22.8 227.0 Low 11:15:57 - 11:27:54 4234
Portola 11:21:54 -18.9 Dark Up 22.6 227.4 Low 11:15:56 - 11:27:53 4225
Reno 11:21:52 -18.7 Dark Up 22.4 228.0 Low 11:15:53 - 11:27:50 4207
Carson City 11:21:51 -18.9 Dark Up 22.7 228.2 Low 11:15:52 - 11:27:49 4185
Yerington 11:21:48 -18.6 Dark Up 22.4 228.8 Low 11:15:50 - 11:27:47 4172
Gardnerville 11:21:50 -19.0 Dark Up 22.8 228.3 Low 11:15:51 - 11:27:48 4170
Niwot 11:21:17 -8.9 CT Down 13.1 239.3 Really Low 11:15:19 - 11:27:16 4160
Hawthorne 11:21:46 -18.6 Dark Up 22.4 229.3 Low 11:15:47 - 11:27:44 4141
Lee Vining 11:21:45 -19.2 Dark Up 23.1 229.1 Low 11:15:47 - 11:27:44 4107
Tonopah 11:21:40 -17.9 AT Up 21.9 230.6 Low 11:15:42 - 11:27:39 4107
Bishop 11:21:42 -19.1 Dark Up 23.1 229.9 Low 11:15:43 - 11:27:40 4067
Beatty 11:21:35 -18.3 Dark Up 22.4 231.4 Low 11:15:37 - 11:27:34 4031
Lone Pine 11:21:39 -19.3 Dark Up 23.4 230.4 Low 11:15:40 - 11:27:37 4016
Indian Springs 11:21:32 -17.8 AT Down 21.9 232.3 Low 11:15:33 - 11:27:30 4005
Henderson 11:21:29 -17.6 AT Down 21.8 233.0 Low 11:15:30 - 11:27:27 3967
CPSLO 11:21:42 -21.8 Dark Up 25.8 228.7 Low 11:15:44 - 11:27:41 3937
Searchlight/Boulder City 11:21:27 -17.9 AT Down 22.1 233.2 Low 11:15:28 - 11:27:25 3928
Patrick 11:21:24 -17.2 AT Down 21.4 234.1 Low 11:15:25 - 11:27:22 3919
Laughlin/Bullhead City 11:21:25 -17.8 AT Down 22.0 233.6 Low 11:15:26 - 11:27:23 3906
Kingman/Dolan Springs 11:21:24 -17.4 AT Down 21.7 234.0 Low 11:15:25 - 11:27:22 3905
DCO 11:21:21 -16.8 AT Down 21.2 234.7 Low 11:15:22 - 11:27:19 3895
Mohave Valley 11:21:24 -17.9 AT Down 22.2 233.7 Low 11:15:26 - 11:27:23 3888
Lake Havasu City 11:21:22 -18.0 AT Down 22.3 234.0 Low 11:15:24 - 11:27:21 3859
Wildwood 11:21:33 -21.1 Dark Up 25.3 230.8 Low 11:15:35 - 11:27:32 3849
Parker 11:21:21 -18.1 Dark Down 22.5 234.2 Low 11:15:23 - 11:27:20 3834
Idyllwild 11:21:27 -20.0 Dark Up 24.3 232.4 Low 11:15:29 - 11:27:26 3817
Blythe 11:21:21 -18.6 Dark Down 23.0 234.1 Low 11:15:22 - 11:27:19 3799
Calipatria 11:21:22 -19.5 Dark Down 23.9 233.6 Low 11:15:23 - 11:27:20 3769
Yuma 11:21:18 -19.1 Dark Down 23.6 234.4 Low 11:15:19 - 11:27:16 3734

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 310071, (2018/04/26 11:24UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 18.50  32
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.88  57
PPM 229046     14:36:58.7 -12:18:13  6.2  1.45  49
PPM 229140     14:41:18.9 -13:55:43  8.5  0.49  50
PPM 229092     14:39:17.1 -13:41:07  9.5  0.32  50
310071         14:40:20.4 -13:29:50 17.0        50
Positions are for J2000

Event circumstances last updated at 2018/03/08 17:20:12 UT

Marc W. Buie, Southwest Research Institute

RECON