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 11:22:28 UTC

J2000 position of star is 14:40:20.4 -13:29:50
Equinox of date position of star is 14:41:19.2 -13:34:24
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 60 seconds.
The 1-sigma cross-track error in the shadow position is 1105 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 11:22UT)
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 14.0 km RECON observability=0.7 and success probability=2.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:21:01 -12.8 AT Up 15.9 225.8 Really Low 11:15:30 - 11:26:31 3681
Tonasket 11:21:00 -13.0 AT Up 16.1 225.8 Really Low 11:15:29 - 11:26:30 3671
Okanogan 11:20:59 -13.2 AT Up 16.4 225.8 Really Low 11:15:29 - 11:26:30 3656
Brewster 11:20:59 -13.5 AT Up 16.7 225.7 Really Low 11:15:28 - 11:26:29 3644
Manson/Chelan 11:20:59 -13.8 AT Up 17.0 225.4 Really Low 11:15:28 - 11:26:29 3635
Entiat 11:20:59 -14.0 AT Up 17.2 225.4 Really Low 11:15:28 - 11:26:29 3625
Wenatchee 11:20:58 -14.2 AT Up 17.4 225.3 Really Low 11:15:28 - 11:26:29 3613
Ellensburg 11:20:57 -14.6 AT Up 17.8 225.2 Really Low 11:15:27 - 11:26:28 3593
Yakima 11:20:56 -14.9 AT Up 18.1 225.3 Really Low 11:15:25 - 11:26:26 3574
Toppenish/White Swan 11:20:55 -14.9 AT Up 18.2 225.5 Really Low 11:15:25 - 11:26:26 3563
Pasco 11:20:52 -14.3 AT Up 17.7 226.6 Really Low 11:15:21 - 11:26:22 3554
PNWRO 11:20:50 -14.4 AT Up 17.7 226.9 Really Low 11:15:20 - 11:26:21 3541
George/Umatilla 11:20:51 -14.7 AT Up 18.0 226.5 Really Low 11:15:21 - 11:26:22 3538
Goldendale 11:20:55 -15.5 AT Up 18.8 225.2 Really Low 11:15:24 - 11:26:25 3536
The Dalles 11:20:55 -15.9 AT Up 19.1 225.0 Really Low 11:15:25 - 11:26:26 3525
Maupin 11:20:54 -16.1 AT Up 19.4 225.2 Really Low 11:15:23 - 11:26:24 3504
Madras/Culver 11:20:52 -16.4 AT Up 19.8 225.3 Really Low 11:15:21 - 11:26:22 3475
Sisters 11:20:52 -16.9 AT Up 20.3 225.0 Low 11:15:21 - 11:26:22 3458
Redmond 11:20:51 -16.7 AT Up 20.1 225.3 Low 11:15:20 - 11:26:21 3456
Bend 11:20:51 -16.9 AT Up 20.3 225.2 Low 11:15:21 - 11:26:22 3445
Oregon Observatory 11:20:51 -17.1 AT Up 20.5 225.2 Low 11:15:20 - 11:26:21 3436
La Pine/Gilchrist 11:20:50 -17.3 AT Up 20.7 225.2 Low 11:15:20 - 11:26:21 3425
North Lake 11:20:48 -17.2 AT Up 20.7 225.8 Low 11:15:17 - 11:26:18 3401
Paisley 11:20:45 -17.3 AT Up 20.9 226.3 Low 11:15:14 - 11:26:15 3370
Chiloquin 11:20:48 -18.2 Dark Up 21.6 225.2 Low 11:15:17 - 11:26:18 3365
Klamath Falls 11:20:47 -18.3 Dark Up 21.8 225.3 Low 11:15:16 - 11:26:17 3345
Lakeview 11:20:43 -17.6 AT Up 21.1 226.6 Low 11:15:12 - 11:26:13 3341
Tulelake 11:20:45 -18.3 Dark Up 21.9 225.7 Low 11:15:15 - 11:26:16 3330
Cedarville 11:20:40 -17.9 AT Up 21.5 226.9 Low 11:15:10 - 11:26:11 3303
Fall River/Burney 11:20:43 -18.9 Dark Up 22.5 226.0 Low 11:15:12 - 11:26:13 3277
Susanville 11:20:38 -18.8 Dark Up 22.5 226.8 Low 11:15:08 - 11:26:09 3239
Greenville 11:20:38 -19.2 Dark Up 22.9 226.6 Low 11:15:08 - 11:26:09 3223
Gimple 11:20:39 -19.1 Dark Up 22.8 226.7 Low 11:15:08 - 11:26:09 3223
Quincy 11:20:38 -19.3 Dark Up 23.0 226.7 Low 11:15:08 - 11:26:09 3211
Portola 11:20:37 -19.1 Dark Up 22.8 227.1 Low 11:15:06 - 11:26:07 3202
Reno 11:20:34 -18.9 Dark Up 22.6 227.8 Low 11:15:03 - 11:26:04 3185
Carson City 11:20:33 -19.1 Dark Up 22.9 227.9 Low 11:15:02 - 11:26:03 3163
Yerington 11:20:30 -18.8 Dark Up 22.6 228.5 Low 11:15:00 - 11:26:01 3149
Gardnerville 11:20:32 -19.2 Dark Up 23.0 228.0 Low 11:15:01 - 11:26:02 3148
Niwot 11:19:59 -9.1 CT Down 13.3 239.1 Really Low 11:14:29 - 11:25:30 3139
Hawthorne 11:20:28 -18.8 Dark Up 22.6 229.1 Low 11:14:57 - 11:25:58 3119
Tonopah 11:20:23 -18.1 Dark Up 22.1 230.4 Low 11:14:52 - 11:25:53 3085
Lee Vining 11:20:27 -19.4 Dark Up 23.3 228.8 Low 11:14:57 - 11:25:58 3085
Bishop 11:20:24 -19.3 Dark Up 23.3 229.6 Low 11:14:53 - 11:25:54 3045
Beatty 11:20:18 -18.5 Dark Up 22.6 231.1 Low 11:14:47 - 11:25:48 3009
Lone Pine 11:20:21 -19.5 Dark Up 23.6 230.1 Low 11:14:50 - 11:25:51 2994
Indian Springs 11:20:14 -18.0 AT Down 22.1 232.1 Low 11:14:44 - 11:25:45 2983
Henderson 11:20:11 -17.8 AT Down 22.0 232.8 Low 11:14:40 - 11:25:41 2945
CPSLO 11:20:25 -22.0 Dark Up 26.0 228.4 Low 11:14:54 - 11:25:55 2915
Searchlight/Boulder City 11:20:08 -18.1 Dark Down 22.3 233.0 Low 11:14:38 - 11:25:39 2906
Patrick 11:20:06 -17.4 AT Down 21.7 233.8 Low 11:14:35 - 11:25:36 2897
Laughlin/Bullhead City 11:20:07 -18.0 Dark Down 22.3 233.4 Low 11:14:36 - 11:25:37 2884
Kingman/Dolan Springs 11:20:05 -17.6 AT Down 21.9 233.7 Low 11:14:35 - 11:25:36 2883
DCO 11:20:03 -17.1 AT Down 21.4 234.5 Low 11:14:32 - 11:25:33 2873
Mohave Valley 11:20:06 -18.1 Dark Down 22.4 233.4 Low 11:14:36 - 11:25:37 2866
Lake Havasu City 11:20:04 -18.2 Dark Down 22.5 233.8 Low 11:14:34 - 11:25:35 2837
Wildwood 11:20:15 -21.3 Dark Up 25.5 230.6 Low 11:14:45 - 11:25:46 2827
Parker 11:20:03 -18.4 Dark Down 22.7 233.9 Low 11:14:33 - 11:25:34 2813
Idyllwild 11:20:09 -20.3 Dark Up 24.5 232.2 Low 11:14:38 - 11:25:39 2795
Blythe 11:20:03 -18.8 Dark Down 23.2 233.9 Low 11:14:32 - 11:25:33 2778
Calipatria 11:20:04 -19.8 Dark Down 24.1 233.3 Low 11:14:34 - 11:25:35 2747
Yuma 11:20:00 -19.4 Dark Down 23.8 234.1 Low 11:14:30 - 11:25:31 2712

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 11:22UT)
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     14:39:17.2 -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 2017/12/02 17:28:20 UT

Marc W. Buie, Southwest Research Institute

RECON