RECON: TNO occultation with 341275

Event between (341275) 07RG283 and star UC4-680-026915 with event index number of 110095

Geocentric closest approach at 2018/03/29 05:41:08 UTC

J2000 position of star is 04:12:25.7 +45:59:16
Equinox of date position of star is 04:13:35.8 +46:01:42
Stellar brightness R=16.4
Star is 88 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=20.9

[RECON map]
TNO is 15.7 AU from the Sun and 16.1 AU from the Earth.
The TNO is moving 25.2 km/sec on the sky relative to the star, or, 7.8 arcsec/hr.
The 1-sigma error in the time of the event is 122 seconds.
The 1-sigma cross-track error in the shadow position is 1108 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 4.6 sec chord
Diameter=46.9 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 341275, (2018/03/29 05:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:58.2 +16:32:41  0.8 29.88  89
Mirphak        03:25:38.1 +49:55:29  1.8  8.93  95
53 Per         04:22:52.6 +46:32:28  4.7  1.66  87
PPM 046857     04:12:26.3 +45:26:53  8.3  0.63  89
PPM 046872     04:13:16.8 +46:06:58  8.8  0.11  88
341275         04:13:44.3 +46:02:00 16.4        88
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 4.0 km RECON observability=1.0 and success probability=2.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:43:02 -29.6 Dark Up 32.9 304.1 Up 05:32:24 - 05:53:40 3090
Tonasket 05:43:02 -29.8 Dark Up 32.8 304.2 Up 05:32:24 - 05:53:40 3085
Okanogan 05:43:04 -30.0 Dark Up 32.7 304.3 Up 05:32:26 - 05:53:42 3071
Brewster 05:43:05 -30.1 Dark Up 32.7 304.4 Up 05:32:27 - 05:53:43 3055
Manson/Chelan 05:43:06 -30.1 Dark Up 32.7 304.3 Up 05:32:28 - 05:53:44 3032
Entiat 05:43:07 -30.2 Dark Up 32.7 304.4 Up 05:32:29 - 05:53:45 3023
Wenatchee 05:43:08 -30.3 Dark Up 32.6 304.5 Up 05:32:30 - 05:53:46 3012
Ellensburg 05:43:10 -30.5 Dark Up 32.4 304.6 Up 05:32:32 - 05:53:48 2992
Yakima 05:43:12 -30.8 Dark Up 32.2 304.8 Up 05:32:34 - 05:53:50 2981
Toppenish/White Swan 05:43:12 -31.1 Dark Up 32.0 305.0 Up 05:32:34 - 05:53:50 2985
Pasco 05:43:12 -31.8 Dark Up 31.2 305.7 Up 05:32:34 - 05:53:50 3048
PNWRO 05:43:12 -32.0 Dark Up 30.9 305.9 Up 05:32:34 - 05:53:50 3055
George/Umatilla 05:43:13 -31.9 Dark Up 31.1 305.7 Up 05:32:35 - 05:53:51 3029
Goldendale 05:43:14 -31.3 Dark Up 31.9 305.1 Up 05:32:36 - 05:53:52 2949
The Dalles 05:43:16 -31.3 Dark Up 32.0 305.0 Up 05:32:38 - 05:53:54 2923
Maupin 05:43:17 -31.6 Dark Up 31.7 305.3 Up 05:32:39 - 05:53:55 2918
Madras/Culver 05:43:19 -32.0 Dark Up 31.4 305.6 Up 05:32:41 - 05:53:57 2901
Sisters 05:43:21 -32.0 Dark Up 31.5 305.5 Up 05:32:43 - 05:53:59 2868
Redmond 05:43:20 -32.2 Dark Up 31.2 305.7 Up 05:32:42 - 05:53:58 2889
Bend 05:43:22 -32.3 Dark Up 31.2 305.8 Up 05:32:44 - 05:54:00 2876
Oregon Observatory 05:43:22 -32.4 Dark Up 31.1 305.8 Up 05:32:44 - 05:54:00 2863
LaPine/Gilchrist 05:43:23 -32.5 Dark Up 31.1 305.9 Up 05:32:45 - 05:54:01 2854
North Lake 05:43:24 -33.1 Dark Up 30.4 306.3 Up 05:32:46 - 05:54:02 2876
Paisley 05:43:26 -33.7 Dark Up 29.9 306.7 Low 05:32:48 - 05:54:04 2880
Chiloquin 05:43:27 -33.1 Dark Up 30.6 306.3 Up 05:32:49 - 05:54:05 2802
Klamath Falls 05:43:28 -33.4 Dark Up 30.3 306.4 Up 05:32:50 - 05:54:06 2796
Lakeview 05:43:27 -34.1 Dark Up 29.5 307.1 Low 05:32:49 - 05:54:05 2876
Tulelake 05:43:29 -33.7 Dark Up 30.0 306.7 Up 05:32:51 - 05:54:07 2805
Cedarville 05:43:30 -34.7 Dark Up 29.0 307.4 Low 05:32:52 - 05:54:08 2867
Fall River/Burney 05:43:32 -34.4 Dark Up 29.4 307.2 Low 05:32:54 - 05:54:10 2781
Susanville 05:43:34 -35.2 Dark Up 28.6 307.7 Low 05:32:56 - 05:54:12 2804
Greenville 05:43:35 -35.3 Dark Up 28.6 307.7 Low 05:32:57 - 05:54:13 2778
Niwot 05:43:17 -42.6 Dark Up 19.5 314.4 Really Low 05:32:39 - 05:53:55 3632
Quincy 05:43:35 -35.4 Dark Up 28.4 307.8 Low 05:32:57 - 05:54:13 2771
Portola 05:43:35 -35.8 Dark Up 28.1 308.1 Low 05:32:57 - 05:54:13 2796
Reno 05:43:36 -36.3 Dark Up 27.5 308.4 Low 05:32:58 - 05:54:14 2825
Carson City 05:43:37 -36.6 Dark Up 27.3 308.6 Low 05:32:59 - 05:54:15 2815
Yerington 05:43:37 -37.1 Dark Up 26.8 308.9 Low 05:32:59 - 05:54:15 2846
Gardnerville 05:43:38 -36.8 Dark Up 27.1 308.7 Low 05:33:00 - 05:54:16 2809
Hawthorne 05:43:38 -37.7 Dark Up 26.2 309.3 Low 05:33:00 - 05:54:16 2862
Lee Vining 05:43:41 -37.8 Dark Up 26.1 309.3 Low 05:33:03 - 05:54:19 2814
Tonopah 05:43:38 -38.8 Dark Up 25.0 310.0 Low 05:33:00 - 05:54:16 2929
Bishop 05:43:42 -38.7 Dark Up 25.3 309.8 Low 05:33:04 - 05:54:20 2837
Lone Pine 05:43:44 -39.4 Dark Up 24.6 310.2 Low 05:33:06 - 05:54:22 2830
Beatty 05:43:42 -39.9 Dark Up 24.0 310.6 Low 05:33:04 - 05:54:20 2918
Indian Springs 05:43:42 -40.7 Dark Up 23.1 311.1 Low 05:33:04 - 05:54:20 2970
Henderson 05:43:43 -41.5 Dark Up 22.3 311.5 Low 05:33:05 - 05:54:21 2993
Searchlight/Boulder City 05:43:45 -42.0 Dark Up 21.9 311.7 Low 05:33:07 - 05:54:23 2978
CPSLO 05:43:51 -38.8 Dark Up 25.3 309.8 Low 05:33:13 - 05:54:29 2623
Kingman/Dolan Springs 05:43:45 -42.6 Dark Up 21.2 312.1 Low 05:33:07 - 05:54:23 3019
Laughlin/Bullhead City 05:43:45 -42.4 Dark Up 21.5 311.9 Low 05:33:07 - 05:54:23 2988
DCO 05:43:44 -43.2 Dark Up 20.6 312.5 Low 05:33:06 - 05:54:22 3069
Mohave Valley 05:43:46 -42.6 Dark Up 21.3 312.0 Low 05:33:08 - 05:54:24 2979
Lake Havasu City 05:43:47 -43.0 Dark Up 20.9 312.2 Low 05:33:09 - 05:54:25 2979
Parker 05:43:48 -43.3 Dark Up 20.6 312.3 Low 05:33:10 - 05:54:26 2969
Idyllwild 05:43:52 -42.2 Dark Up 21.8 311.6 Low 05:33:14 - 05:54:30 2809
Blythe 05:43:50 -43.5 Dark Up 20.4 312.4 Low 05:33:12 - 05:54:28 2932
Calipatria 05:43:52 -43.3 Dark Up 20.7 312.2 Low 05:33:14 - 05:54:30 2857
Yuma 05:43:53 -44.2 Dark Up 19.8 312.6 Really Low 05:33:15 - 05:54:31 2896

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.

Event circumstances last updated at 2016/04/02 16:41:16 UT

Marc W. Buie, Southwest Research Institute

RECON