RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1320:01773260 with event index number of 165720

Geocentric closest approach at 2018/12/08 11:49:50 UTC

J2000 position of star is 04:18:37.6 +42:48:17
Equinox of date position of star is 04:19:54.9 +42:50:54
Stellar brightness G=16.3, use SENSEUP=128
Star is 150 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.4

[RECON map]
TNO is 15.5 AU from the Sun and 14.6 AU from the Earth.
The TNO is moving 23.8 km/sec on the sky relative to the star, or, 8.1 arcsec/hr.
The 1-sigma error in the time of the event is 137 seconds.
The 1-sigma cross-track error in the shadow position is 1854 km.
The sky-plane scale is 10596.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.2 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2018/12/08 11:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.6 +16:32:45  0.8 26.55 160
Mirphak        03:25:41.1 +49:55:37  1.8 11.70 138
PPM 046963     04:19:27.1 +42:11:10  6.1  0.67 150
PPM 046980     04:20:32.2 +42:25:32  7.2  0.44 150
PPM 046938     04:17:51.1 +42:58:58 10.0  0.41 149
PPM 046961     04:19:21.7 +42:46:22 11.4  0.13 150
248835         04:19:57.0 +42:50:59 16.3       150
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 21.9 km RECON observability=1.0 and success probability=22.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 11:46:38 -36.9 Dark Down 43.1 289.7 Up 11:34:43 - 11:58:33 423
Oroville 11:46:37 -37.0 Dark Down 42.8 290.3 Up 11:34:42 - 11:58:32 368
Tonasket 11:46:36 -37.0 Dark Down 42.7 290.5 Up 11:34:41 - 11:58:31 345
Okanogan 11:46:36 -37.1 Dark Down 42.7 290.7 Up 11:34:41 - 11:58:31 307
Brewster 11:46:36 -37.3 Dark Down 42.7 290.9 Up 11:34:41 - 11:58:31 273
Manson/Chelan 11:46:36 -37.6 Dark Down 42.9 290.8 Up 11:34:41 - 11:58:31 240
Entiat 11:46:36 -37.6 Dark Down 42.8 291.0 Up 11:34:41 - 11:58:31 216
Wenatchee 11:46:36 -37.7 Dark Down 42.8 291.2 Up 11:34:41 - 11:58:31 187
Ellensburg 11:46:35 -37.9 Dark Down 42.8 291.4 Up 11:34:40 - 11:58:30 139
Pasco 11:46:31 -37.0 Dark Down 41.6 292.7 Up 11:34:36 - 11:58:26 112
Niwot 11:45:59 -26.8 Dark Down 29.9 302.7 Low 11:34:04 - 11:57:54 109
Yakima 11:46:35 -38.0 Dark Down 42.6 291.8 Up 11:34:40 - 11:58:30 98
PNWRO 11:46:30 -36.9 Dark Down 41.4 293.0 Up 11:34:35 - 11:58:25 96
Toppenish/White Swan 11:46:34 -37.9 Dark Down 42.5 292.0 Up 11:34:39 - 11:58:29 82
George/Umatilla 11:46:31 -37.2 Dark Down 41.6 292.9 Up 11:34:36 - 11:58:26 72
Goldendale 11:46:34 -38.3 Dark Down 42.5 292.3 Up 11:34:39 - 11:58:29 12
The Dalles 11:46:34 -38.5 Dark Down 42.7 292.3 Up 11:34:39 - 11:58:29 -23
Maupin 11:46:34 -38.5 Dark Down 42.5 292.7 Up 11:34:39 - 11:58:29 -61
Madras/Culver 11:46:33 -38.6 Dark Down 42.3 293.1 Up 11:34:38 - 11:58:28 -118
Redmond 11:46:32 -38.7 Dark Down 42.2 293.4 Up 11:34:37 - 11:58:27 -155
Sisters 11:46:33 -38.9 Dark Down 42.4 293.2 Up 11:34:38 - 11:58:28 -166
Bend 11:46:32 -38.8 Dark Down 42.2 293.5 Up 11:34:37 - 11:58:27 -182
Oregon Observatory 11:46:32 -38.9 Dark Down 42.2 293.6 Up 11:34:37 - 11:58:27 -204
La Pine/Gilchrist 11:46:32 -38.9 Dark Down 42.1 293.8 Up 11:34:37 - 11:58:27 -226
North Lake 11:46:30 -38.5 Dark Down 41.6 294.4 Up 11:34:35 - 11:58:25 -249
Paisley 11:46:29 -38.3 Dark Down 41.1 295.0 Up 11:34:34 - 11:58:24 -292
Lakeview 11:46:28 -38.2 Dark Down 40.8 295.4 Up 11:34:33 - 11:58:23 -336
Chiloquin 11:46:31 -39.3 Dark Down 41.9 294.5 Up 11:34:36 - 11:58:26 -351
Klamath Falls 11:46:31 -39.3 Dark Down 41.7 294.8 Up 11:34:36 - 11:58:26 -382
Cedarville 11:46:26 -38.1 Dark Down 40.4 296.0 Up 11:34:31 - 11:58:21 -396
Tulelake 11:46:30 -39.1 Dark Down 41.4 295.2 Up 11:34:35 - 11:58:25 -399
Fall River/Burney 11:46:29 -39.0 Dark Down 41.0 295.9 Up 11:34:34 - 11:58:24 -488
Susanville 11:46:26 -38.5 Dark Down 40.2 296.7 Up 11:34:31 - 11:58:21 -525
Gimple 11:46:26 -38.7 Dark Down 40.2 296.8 Up 11:34:31 - 11:58:21 -560
Greenville 11:46:26 -38.7 Dark Down 40.3 296.8 Up 11:34:31 - 11:58:21 -563
Portola 11:46:25 -38.4 Dark Down 39.8 297.2 Up 11:34:30 - 11:58:20 -579
Reno 11:46:23 -37.9 Dark Down 39.2 297.6 Up 11:34:28 - 11:58:18 -581
Quincy 11:46:26 -38.8 Dark Down 40.2 296.9 Up 11:34:31 - 11:58:21 -583
Yerington 11:46:22 -37.4 Dark Down 38.5 298.2 Up 11:34:27 - 11:58:17 -611
Carson City 11:46:23 -37.9 Dark Down 39.1 297.9 Up 11:34:28 - 11:58:18 -616
Tonopah 11:46:16 -35.9 Dark Down 36.8 299.5 Up 11:34:21 - 11:58:11 -627
Hawthorne 11:46:20 -37.0 Dark Down 38.0 298.7 Up 11:34:25 - 11:58:15 -637
Gardnerville 11:46:23 -37.9 Dark Down 38.9 298.1 Up 11:34:28 - 11:58:18 -639
Indian Springs 11:46:12 -34.6 Dark Down 35.0 300.9 Up 11:34:17 - 11:58:07 -708
Lee Vining 11:46:20 -37.4 Dark Down 38.0 298.9 Up 11:34:25 - 11:58:15 -712
Beatty 11:46:14 -35.5 Dark Down 35.9 300.4 Up 11:34:19 - 11:58:09 -721
Henderson 11:46:10 -34.0 Dark Down 34.2 301.4 Up 11:34:15 - 11:58:05 -730
DCO 11:46:05 -32.4 Dark Down 32.5 302.5 Up 11:34:10 - 11:58:00 -738
Patrick 11:46:07 -33.0 Dark Down 33.1 302.1 Up 11:34:12 - 11:58:02 -741
Bishop 11:46:18 -36.8 Dark Down 37.2 299.6 Up 11:34:23 - 11:58:13 -743
Kingman/Dolan Springs 11:46:07 -33.2 Dark Down 33.1 302.2 Up 11:34:12 - 11:58:02 -771
Searchlight/Boulder City 11:46:09 -33.9 Dark Down 33.9 301.8 Up 11:34:14 - 11:58:04 -782
Laughlin/Bullhead City 11:46:08 -33.6 Dark Down 33.5 302.0 Up 11:34:13 - 11:58:03 -796
Lone Pine 11:46:16 -36.5 Dark Down 36.6 300.2 Up 11:34:21 - 11:58:11 -804
Mohave Valley 11:46:08 -33.5 Dark Down 33.3 302.2 Up 11:34:13 - 11:58:03 -822
Lake Havasu City 11:46:07 -33.3 Dark Down 33.0 302.5 Up 11:34:12 - 11:58:02 -849
Parker 11:46:06 -33.2 Dark Down 32.7 302.7 Up 11:34:11 - 11:58:01 -882
Blythe 11:46:07 -33.4 Dark Down 32.7 302.9 Up 11:34:12 - 11:58:02 -946
Idyllwild 11:46:11 -35.2 Dark Down 34.2 302.3 Up 11:34:16 - 11:58:06 -1029
Calipatria 11:46:08 -34.1 Dark Down 33.1 302.9 Up 11:34:13 - 11:58:03 -1036
CPSLO 11:46:21 -38.5 Dark Down 37.8 300.3 Up 11:34:26 - 11:58:16 -1036
Yuma 11:46:06 -33.4 Dark Down 32.2 303.4 Up 11:34:11 - 11:58:01 -1037
Wildwood 11:46:16 -36.8 Dark Down 35.7 301.6 Up 11:34:21 - 11:58:11 -1074

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 248835, (2018/12/08 11:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.55 160
Mirphak        03:24:19.4 +49:51:40  1.8 11.70 138
PPM 046963     04:18:08.2 +42:08:28  6.1  0.67 150
PPM 046980     04:19:13.1 +42:22:51  7.2  0.44 150
PPM 046938     04:16:31.7 +42:56:14 10.0  0.41 149
PPM 046961     04:18:02.3 +42:43:40 11.4  0.13 150
248835         04:18:37.6 +42:48:17 16.3       150
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:38:01 UT

Marc W. Buie, Southwest Research Institute

RECON