RECON: TNO occultation with 308634

Event between (308634) 05XU100 and star UC4-501-053749 with event index number of 109969

Geocentric closest approach at 2018/03/08 02:32:52 UTC

J2000 position of star is 10:04:59.3 +10:01:54
Equinox of date position of star is 10:05:52.8 +09:56:59
Stellar brightness R=16.5
Star is 93 degrees from the moon. Moon is 63% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 42.9 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 138 seconds.
The 1-sigma cross-track error in the shadow position is 2393 km.
The sky-plane scale is 30461.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 13.7 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 308634, (2018/03/08 02:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:20.3 +11:52:40  1.3  2.11  92
31 Leo         10:08:52.1 +09:54:28  6.0  0.72  92
PPM 156458     10:04:31.1 +09:48:37  7.4  0.38  93
PPM 156487     10:05:52.8 +09:45:25 10.0  0.19  93
308634         10:05:57.3 +09:56:35 16.5        92
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 0.0 km RECON observability=0.0 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)
Oroville 02:36:22 -8.3 CT Down 23.3 101.9 Low 02:24:25 - 02:48:20 3356
Tonasket 02:36:22 -8.3 CT Down 23.4 101.8 Low 02:24:25 - 02:48:20 3333
Okanogan 02:36:23 -8.2 CT Down 23.4 101.6 Low 02:24:26 - 02:48:21 3300
Brewster 02:36:24 -8.1 CT Down 23.3 101.3 Low 02:24:27 - 02:48:22 3273
Manson/Chelan 02:36:25 -7.9 CT Down 23.1 100.9 Low 02:24:28 - 02:48:23 3252
Entiat 02:36:26 -7.8 CT Down 23.1 100.8 Low 02:24:28 - 02:48:23 3231
Wenatchee 02:36:26 -7.7 CT Down 23.1 100.6 Low 02:24:28 - 02:48:23 3205
Ellensburg 02:36:27 -7.6 CT Down 23.0 100.2 Low 02:24:30 - 02:48:25 3164
Yakima 02:36:28 -7.6 CT Down 23.1 100.0 Low 02:24:31 - 02:48:26 3123
Toppenish/White Swan 02:36:28 -7.7 CT Down 23.2 100.1 Low 02:24:31 - 02:48:26 3101
Pasco 02:36:26 -8.6 CT Down 24.1 101.0 Low 02:24:28 - 02:48:23 3087
PNWRO 02:36:27 -8.8 CT Down 24.3 101.1 Low 02:24:29 - 02:48:24 3062
George/Umatilla 02:36:28 -8.5 CT Down 24.0 100.7 Low 02:24:30 - 02:48:25 3054
Goldendale 02:36:29 -7.4 CT Down 23.0 99.5 Low 02:24:32 - 02:48:27 3046
The Dalles 02:36:30 -7.2 CT Down 22.8 99.2 Low 02:24:33 - 02:48:28 3023
Maupin 02:36:30 -7.3 CT Down 22.9 99.1 Low 02:24:33 - 02:48:28 2980
Madras/Culver 02:36:32 -7.2 CT Down 23.0 98.8 Low 02:24:35 - 02:48:30 2925
Sisters 02:36:33 -6.9 CT Down 22.7 98.3 Low 02:24:36 - 02:48:31 2891
Redmond 02:36:33 -7.2 CT Down 23.0 98.6 Low 02:24:35 - 02:48:30 2888
Bend 02:36:33 -7.1 CT Down 23.0 98.4 Low 02:24:36 - 02:48:31 2866
Oregon Observatory 02:36:33 -7.0 CT Down 22.9 98.3 Low 02:24:36 - 02:48:31 2849
La Pine/Gilchrist 02:36:34 -7.0 CT Down 22.9 98.1 Low 02:24:37 - 02:48:32 2828
North Lake 02:36:34 -7.4 CT Down 23.4 98.4 Low 02:24:37 - 02:48:32 2782
Paisley 02:36:34 -7.7 CT Down 23.7 98.4 Low 02:24:37 - 02:48:32 2724
Chiloquin 02:36:37 -6.7 CT Down 22.8 97.4 Low 02:24:39 - 02:48:34 2713
Klamath Falls 02:36:37 -6.8 CT Down 22.9 97.3 Low 02:24:39 - 02:48:34 2678
Lakeview 02:36:35 -7.8 CT Down 23.9 98.3 Low 02:24:38 - 02:48:33 2671
Tulelake 02:36:37 -7.0 CT Down 23.1 97.4 Low 02:24:39 - 02:48:34 2649
Cedarville 02:36:36 -8.0 CT Down 24.2 98.2 Low 02:24:38 - 02:48:33 2602
Fall River/Burney 02:36:37 -7.1 CT Down 23.3 97.1 Low 02:24:40 - 02:48:35 2554
Niwot 02:36:08 -19.3 Dark Down 35.4 108.7 Up 02:24:11 - 02:48:06 2495
Susanville 02:36:38 -7.6 CT Down 24.0 97.4 Low 02:24:40 - 02:48:35 2486
Greenville 02:36:39 -7.4 CT Down 23.8 97.0 Low 02:24:41 - 02:48:36 2457
Quincy 02:36:39 -7.4 CT Down 23.8 96.9 Low 02:24:42 - 02:48:37 2436
Portola 02:36:39 -7.8 CT Down 24.2 97.2 Low 02:24:41 - 02:48:36 2422
Reno 02:36:38 -8.3 CT Down 24.7 97.5 Low 02:24:40 - 02:48:35 2393
Carson City 02:36:38 -8.3 CT Down 24.8 97.4 Low 02:24:41 - 02:48:36 2355
Yerington 02:36:37 -8.8 CT Down 25.3 97.7 Low 02:24:40 - 02:48:35 2334
Gardnerville 02:36:38 -8.3 CT Down 24.8 97.3 Low 02:24:40 - 02:48:35 2329
Hawthorne 02:36:37 -9.2 CT Down 25.8 97.9 Low 02:24:39 - 02:48:34 2284
Tonopah 02:36:35 -10.3 CT Down 26.9 98.6 Low 02:24:38 - 02:48:33 2234
Lee Vining 02:36:39 -8.8 CT Down 25.5 97.3 Low 02:24:41 - 02:48:36 2225
Bishop 02:36:38 -9.4 CT Down 26.1 97.5 Low 02:24:40 - 02:48:35 2160
Beatty 02:36:36 -10.7 CT Down 27.4 98.3 Low 02:24:38 - 02:48:33 2111
Lone Pine 02:36:38 -9.7 CT Down 26.5 97.3 Low 02:24:41 - 02:48:36 2078
Indian Springs 02:36:34 -11.6 CT Down 28.3 98.8 Low 02:24:36 - 02:48:31 2077
Henderson 02:36:33 -12.2 AT Down 29.0 99.0 Low 02:24:36 - 02:48:31 2020
Searchlight/Boulder City 02:36:34 -12.2 AT Down 29.1 98.7 Low 02:24:36 - 02:48:31 1958
Patrick 02:36:32 -13.1 AT Down 30.0 99.4 Low 02:24:34 - 02:48:29 1955
CPSLO 02:36:44 -7.6 CT Down 24.5 95.1 Low 02:24:46 - 02:48:41 1941
Kingman/Dolan Springs 02:36:32 -13.0 AT Down 29.9 99.1 Low 02:24:35 - 02:48:30 1930
Laughlin/Bullhead City 02:36:33 -12.5 AT Down 29.4 98.8 Low 02:24:35 - 02:48:30 1927
DCO 02:36:30 -13.7 AT Down 30.6 99.7 Up 02:24:33 - 02:48:28 1923
Mohave Valley 02:36:33 -12.6 AT Down 29.5 98.7 Low 02:24:36 - 02:48:31 1897
Lake Havasu City 02:36:33 -12.8 AT Down 29.8 98.6 Low 02:24:36 - 02:48:31 1855
Parker 02:36:33 -12.8 AT Down 29.8 98.4 Low 02:24:36 - 02:48:31 1816
Wildwood 02:36:42 -9.3 CT Down 26.3 95.7 Low 02:24:44 - 02:48:39 1808
Idyllwild 02:36:39 -10.8 CT Down 27.9 96.7 Low 02:24:41 - 02:48:36 1769
Blythe 02:36:35 -12.6 AT Down 29.7 97.9 Low 02:24:37 - 02:48:32 1759
Calipatria 02:36:37 -11.8 CT Down 29.0 97.1 Low 02:24:39 - 02:48:34 1704
Yuma 02:36:35 -12.6 AT Down 29.8 97.4 Low 02:24:38 - 02:48:33 1658

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 308634, (2018/03/08 02:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  2.11  92
31 Leo         10:07:54.2 +09:59:50  6.0  0.72  92
PPM 156458     10:03:33.2 +09:53:56  7.4  0.38  93
PPM 156487     10:04:54.8 +09:50:45 10.0  0.19  93
308634         10:04:59.3 +10:01:54 16.5        93
Positions are for J2000

Event circumstances last updated at 2016/10/09 17:26:19 UT

Marc W. Buie, Southwest Research Institute

RECON