RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-665-024329 with event index number of 165720

Geocentric closest approach at 2018/12/08 11:50:29 UTC

J2000 position of star is 04:18:37.6 +42:48:17
Equinox of date position of star is 04:19:53.6 +42:50:52
Stellar brightness R=16.0, 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 128 seconds.
The 1-sigma cross-track error in the shadow position is 1698 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 16.0       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 17.0 km RECON observability=1.0 and success probability=21.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:47:15 -36.8 Dark Down 42.7 290.4 Up 11:36:03 - 11:58:27 -459
Tonasket 11:47:14 -36.9 Dark Down 42.6 290.6 Up 11:36:02 - 11:58:26 -482
Okanogan 11:47:14 -37.0 Dark Down 42.6 290.8 Up 11:36:02 - 11:58:26 -520
Brewster 11:47:14 -37.2 Dark Down 42.6 290.9 Up 11:36:02 - 11:58:26 -553
Manson/Chelan 11:47:14 -37.5 Dark Down 42.8 290.9 Up 11:36:02 - 11:58:26 -586
Entiat 11:47:14 -37.5 Dark Down 42.7 291.1 Up 11:36:02 - 11:58:26 -610
Wenatchee 11:47:14 -37.6 Dark Down 42.7 291.3 Up 11:36:02 - 11:58:26 -639
Ellensburg 11:47:14 -37.8 Dark Down 42.7 291.5 Up 11:36:02 - 11:58:26 -688
Pasco 11:47:10 -36.9 Dark Down 41.5 292.8 Up 11:35:58 - 11:58:22 -714
Niwot 11:46:37 -26.7 Dark Down 29.7 302.8 Low 11:35:25 - 11:57:49 -715
Yakima 11:47:13 -37.9 Dark Down 42.5 291.8 Up 11:36:01 - 11:58:25 -729
PNWRO 11:47:09 -36.8 Dark Down 41.3 293.1 Up 11:35:57 - 11:58:21 -730
Toppenish/White Swan 11:47:13 -37.8 Dark Down 42.4 292.1 Up 11:36:01 - 11:58:25 -745
George/Umatilla 11:47:10 -37.1 Dark Down 41.5 293.0 Up 11:35:58 - 11:58:22 -755
Goldendale 11:47:12 -38.1 Dark Down 42.4 292.4 Up 11:36:00 - 11:58:24 -814
The Dalles 11:47:13 -38.4 Dark Down 42.6 292.4 Up 11:36:01 - 11:58:25 -849
Maupin 11:47:12 -38.4 Dark Down 42.3 292.8 Up 11:36:00 - 11:58:24 -887
Madras/Culver 11:47:11 -38.5 Dark Down 42.2 293.2 Up 11:35:59 - 11:58:23 -944
Redmond 11:47:11 -38.5 Dark Down 42.1 293.5 Up 11:35:59 - 11:58:23 -981
Sisters 11:47:12 -38.8 Dark Down 42.3 293.3 Up 11:36:00 - 11:58:24 -993
Bend 11:47:11 -38.7 Dark Down 42.1 293.6 Up 11:35:59 - 11:58:23 -1008
Oregon Observatory 11:47:11 -38.8 Dark Down 42.1 293.7 Up 11:35:59 - 11:58:23 -1030
La Pine/Gilchrist 11:47:11 -38.8 Dark Down 42.0 293.8 Up 11:35:59 - 11:58:23 -1052
North Lake 11:47:09 -38.4 Dark Down 41.5 294.4 Up 11:35:57 - 11:58:21 -1075
Paisley 11:47:07 -38.2 Dark Down 41.0 295.0 Up 11:35:55 - 11:58:19 -1118
Lakeview 11:47:06 -38.1 Dark Down 40.7 295.5 Up 11:35:54 - 11:58:18 -1162
Chiloquin 11:47:10 -39.2 Dark Down 41.8 294.6 Up 11:35:58 - 11:58:22 -1177
Klamath Falls 11:47:09 -39.1 Dark Down 41.6 294.9 Up 11:35:57 - 11:58:21 -1209
Cedarville 11:47:05 -38.0 Dark Down 40.3 296.1 Up 11:35:53 - 11:58:17 -1221
Tulelake 11:47:08 -38.9 Dark Down 41.3 295.2 Up 11:35:56 - 11:58:20 -1225
Fall River/Burney 11:47:07 -38.9 Dark Down 40.9 296.0 Up 11:35:55 - 11:58:19 -1314
Susanville 11:47:05 -38.4 Dark Down 40.1 296.7 Up 11:35:53 - 11:58:17 -1351
Gimple 11:47:05 -38.6 Dark Down 40.1 296.9 Up 11:35:53 - 11:58:17 -1386
Greenville 11:47:05 -38.6 Dark Down 40.2 296.8 Up 11:35:53 - 11:58:17 -1389
Portola 11:47:03 -38.3 Dark Down 39.7 297.2 Up 11:35:51 - 11:58:15 -1404
Reno 11:47:02 -37.8 Dark Down 39.1 297.7 Up 11:35:50 - 11:58:14 -1407
Quincy 11:47:05 -38.6 Dark Down 40.1 297.0 Up 11:35:53 - 11:58:17 -1409
Yerington 11:47:00 -37.3 Dark Down 38.4 298.3 Up 11:35:48 - 11:58:12 -1437
Carson City 11:47:02 -37.8 Dark Down 38.9 297.9 Up 11:35:50 - 11:58:14 -1442
Tonopah 11:46:55 -35.7 Dark Down 36.7 299.5 Up 11:35:43 - 11:58:07 -1452
Hawthorne 11:46:58 -36.9 Dark Down 37.8 298.8 Up 11:35:46 - 11:58:10 -1462
Gardnerville 11:47:01 -37.7 Dark Down 38.8 298.1 Up 11:35:49 - 11:58:13 -1464
Indian Springs 11:46:50 -34.5 Dark Down 34.9 301.0 Up 11:35:38 - 11:58:02 -1532
Lee Vining 11:46:59 -37.2 Dark Down 37.9 299.0 Up 11:35:47 - 11:58:11 -1537
Beatty 11:46:53 -35.3 Dark Down 35.8 300.4 Up 11:35:41 - 11:58:05 -1546
Henderson 11:46:48 -33.9 Dark Down 34.1 301.5 Up 11:35:36 - 11:58:00 -1554
DCO 11:46:44 -32.3 Dark Down 32.4 302.5 Up 11:35:32 - 11:57:56 -1562
Patrick 11:46:45 -32.9 Dark Down 33.0 302.2 Up 11:35:33 - 11:57:57 -1565
Bishop 11:46:56 -36.6 Dark Down 37.1 299.6 Up 11:35:44 - 11:58:08 -1568
Kingman/Dolan Springs 11:46:45 -33.0 Dark Down 33.0 302.2 Up 11:35:33 - 11:57:57 -1595
Searchlight/Boulder City 11:46:48 -33.8 Dark Down 33.8 301.8 Up 11:35:36 - 11:58:00 -1607
Laughlin/Bullhead City 11:46:47 -33.4 Dark Down 33.4 302.1 Up 11:35:35 - 11:57:59 -1620
Lone Pine 11:46:55 -36.3 Dark Down 36.5 300.2 Up 11:35:43 - 11:58:07 -1629
Mohave Valley 11:46:46 -33.4 Dark Down 33.2 302.2 Up 11:35:34 - 11:57:58 -1646
Lake Havasu City 11:46:45 -33.2 Dark Down 32.8 302.5 Up 11:35:33 - 11:57:57 -1674
Parker 11:46:45 -33.1 Dark Down 32.6 302.7 Up 11:35:33 - 11:57:57 -1706
Blythe 11:46:45 -33.3 Dark Down 32.6 302.9 Up 11:35:33 - 11:57:57 -1770
Idyllwild 11:46:49 -35.1 Dark Down 34.1 302.3 Up 11:35:37 - 11:58:01 -1853
Calipatria 11:46:47 -34.0 Dark Down 32.9 303.0 Up 11:35:35 - 11:57:59 -1860
Yuma 11:46:44 -33.2 Dark Down 32.1 303.4 Up 11:35:32 - 11:57:56 -1861
CPSLO 11:46:59 -38.4 Dark Down 37.7 300.3 Up 11:35:47 - 11:58:11 -1862
Wildwood 11:46:54 -36.6 Dark Down 35.6 301.6 Up 11:35:42 - 11:58:06 -1899

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 16.0       150
Positions are for J2000

Event circumstances last updated at 2018/02/14 17:16:18 UT

Marc W. Buie, Southwest Research Institute

RECON