RECON: TNO occultation with 341275

Event between (341275) 07RG283 and star UC4-683-027108 with event index number of 105809

Geocentric closest approach at 2018/03/03 03:04:29 UTC

J2000 position of star is 04:06:44.2 +46:33:08
Equinox of date position of star is 04:07:54.3 +46:35:41
Stellar brightness R=14.3
Star is 105 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=20.9

[RECON map]
TNO is 15.7 AU from the Sun and 15.7 AU from the Earth.
The TNO is moving 17.3 km/sec on the sky relative to the star, or, 5.4 arcsec/hr.
The 1-sigma error in the time of the event is 114 seconds.
The 1-sigma cross-track error in the shadow position is 2377 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 6.6 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 341275, (2018/03/03 03:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.9 +16:32:40  0.8 30.65 107
Mirphak        03:25:37.7 +49:55:28  1.8  7.79 109
48 Per         04:09:59.2 +47:45:34  4.0  1.21 104
PPM 046821     04:09:44.1 +46:24:47  8.5  0.35 104
PPM 046776     04:06:26.8 +46:40:43  9.8  0.29 105
341275         04:08:02.7 +46:36:00 14.3       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 14.6 km RECON observability=0.4 and success probability=5.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 03:05:17 -14.3 AT Up 72.4 272.1 Up 02:55:19 - 03:15:15 4643
Tonasket 03:05:18 -14.3 AT Up 72.4 272.8 Up 02:55:20 - 03:15:16 4632
Okanogan 03:05:20 -14.3 AT Up 72.5 273.8 Up 02:55:22 - 03:15:18 4607
Brewster 03:05:21 -14.2 AT Up 72.6 274.6 Up 02:55:23 - 03:15:19 4582
Manson/Chelan 03:05:21 -13.9 AT Up 72.8 275.0 Up 02:55:23 - 03:15:19 4548
Entiat 03:05:23 -13.9 AT Up 72.8 275.7 Up 02:55:25 - 03:15:21 4533
Wenatchee 03:05:25 -13.9 AT Up 72.9 276.5 Up 02:55:27 - 03:15:23 4514
Ellensburg 03:05:26 -13.8 AT Up 73.0 277.7 Up 02:55:28 - 03:15:24 4480
Yakima 03:05:28 -13.8 AT Up 72.9 279.0 Up 02:55:30 - 03:15:26 4460
Toppenish/White Swan 03:05:30 -13.9 AT Up 72.8 279.8 Up 02:55:32 - 03:15:28 4461
Pasco 03:05:33 -14.8 AT Up 71.9 280.6 Up 02:55:35 - 03:15:31 4540
PNWRO 03:05:35 -15.0 AT Up 71.6 281.4 Up 02:55:37 - 03:15:33 4544
George/Umatilla 03:05:35 -14.7 AT Up 71.9 281.5 Up 02:55:37 - 03:15:33 4510
Goldendale 03:05:33 -13.7 AT Up 72.9 281.4 Up 02:55:35 - 03:15:31 4405
The Dalles 03:05:34 -13.4 AT Up 73.1 282.0 Up 02:55:36 - 03:15:32 4369
Maupin 03:05:36 -13.6 AT Up 73.0 283.4 Up 02:55:38 - 03:15:34 4356
Madras/Culver 03:05:38 -13.6 AT Up 72.9 285.1 Up 02:55:40 - 03:15:36 4326
Sisters 03:05:38 -13.3 AT Up 73.1 286.1 Up 02:55:40 - 03:15:36 4279
Redmond 03:05:38 -13.5 AT Up 72.8 286.2 Up 02:55:40 - 03:15:36 4305
Bend 03:05:38 -13.5 AT Up 72.8 286.9 Up 02:55:40 - 03:15:36 4285
Oregon Observatory 03:05:38 -13.4 AT Up 72.9 287.4 Up 02:55:40 - 03:15:36 4268
LaPine/Gilchrist 03:05:38 -13.3 AT Up 72.8 288.1 Up 02:55:40 - 03:15:36 4254
North Lake 03:05:38 -13.8 AT Up 72.3 289.3 Up 02:55:40 - 03:15:36 4276
Paisley 03:05:38 -14.1 AT Up 71.9 290.9 Up 02:55:40 - 03:15:36 4278
Chiloquin 03:05:38 -13.1 AT Up 72.7 291.5 Up 02:55:40 - 03:15:36 4176
Klamath Falls 03:05:38 -13.2 AT Up 72.5 292.5 Up 02:55:40 - 03:15:36 4166
Lakeview 03:05:38 -14.3 AT Up 71.5 292.3 Up 02:55:40 - 03:15:36 4270
Tulelake 03:05:38 -13.5 AT Up 72.2 293.2 Up 02:55:40 - 03:15:36 4176
Cedarville 03:05:38 -14.5 AT Up 71.2 294.0 Up 02:55:40 - 03:15:36 4255
Fall River/Burney 03:05:38 -13.6 AT Up 71.8 295.7 Up 02:55:40 - 03:15:36 4143
Susanville 03:05:38 -14.2 AT Up 71.0 297.1 Up 02:55:40 - 03:15:36 4174
Greenville 03:05:38 -13.9 AT Up 71.1 297.9 Up 02:55:40 - 03:15:36 4140
Niwot 03:06:28 -26.0 Dark Up 60.1 296.1 Up 02:56:30 - 03:16:26 5295
Quincy 03:05:38 -14.0 AT Up 71.0 298.5 Up 02:55:40 - 03:15:36 4132
Portola 03:05:38 -14.3 AT Up 70.6 298.6 Up 02:55:40 - 03:15:36 4164
Reno 03:05:38 -14.8 AT Up 70.0 299.0 Up 02:55:40 - 03:15:36 4206
Carson City 03:06:12 -15.0 AT Up 69.7 299.8 Up 02:56:14 - 03:16:10 4152
Yerington 03:06:14 -15.5 AT Up 69.2 300.0 Up 02:56:16 - 03:16:12 4190
Gardnerville 03:06:13 -15.0 AT Up 69.6 300.3 Up 02:56:15 - 03:16:11 4143
Hawthorne 03:06:18 -16.0 AT Up 68.6 300.8 Up 02:56:20 - 03:16:16 4208
Lee Vining 03:06:21 -15.6 AT Up 68.6 302.2 Up 02:56:23 - 03:16:19 4143
Tonopah 03:06:24 -17.1 AT Up 67.4 301.2 Up 02:56:26 - 03:16:22 4294
Bishop 03:06:26 -16.2 AT Up 67.8 303.1 Up 02:56:28 - 03:16:24 4169
Lone Pine 03:06:30 -16.6 AT Up 67.2 304.5 Up 02:56:32 - 03:16:28 4158
Beatty 03:06:31 -17.6 AT Up 66.5 303.3 Up 02:56:33 - 03:16:29 4274
Indian Springs 03:06:35 -18.5 Dark Up 65.5 303.5 Up 02:56:37 - 03:16:33 4344
Henderson 03:06:39 -19.1 Dark Up 64.8 304.2 Up 02:56:41 - 03:16:37 4374
Searchlight/Boulder City 03:06:42 -19.2 Dark Up 64.4 305.2 Up 02:56:44 - 03:16:40 4353
CPSLO 03:06:33 -14.5 AT Up 68.1 308.5 Up 02:56:35 - 03:16:31 3887
Kingman/Dolan Springs 03:06:45 -20.0 Dark Up 63.6 305.3 Up 02:56:47 - 03:16:43 4409
Laughlin/Bullhead City 03:06:45 -19.6 Dark Up 64.0 305.5 Up 02:56:47 - 03:16:43 4366
DCO 03:06:48 -20.7 Dark Up 63.0 305.1 Up 02:56:50 - 03:16:46 4478
Mohave Valley 03:06:46 -19.6 Dark Up 63.8 306.0 Up 02:56:48 - 03:16:44 4355
Lake Havasu City 03:06:49 -19.8 Dark Up 63.4 306.5 Up 02:56:51 - 03:16:47 4356
Parker 03:06:51 -19.9 Dark Up 63.2 307.1 Up 02:56:53 - 03:16:49 4342
Idyllwild 03:06:50 -17.9 AT Up 64.5 308.9 Up 02:56:52 - 03:16:48 4126
Blythe 03:06:53 -19.7 Dark Up 63.0 308.0 Up 02:56:55 - 03:16:51 4294
Calipatria 03:06:55 -19.0 Dark Up 63.3 309.2 Up 02:56:57 - 03:16:53 4194
Yuma 03:06:58 -19.8 Dark Up 62.5 309.4 Up 02:57:00 - 03:16:56 4247

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 2016/03/22 17:05:45 UT

Marc W. Buie, Southwest Research Institute

RECON