RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-664-023517 with event index number of 171056

Geocentric closest approach at 2018/12/15 11:55:57 UTC

J2000 position of star is 04:16:46.9 +42:38:38
Equinox of date position of star is 04:18:00.5 +42:41:11
Stellar brightness R=15.7, use SENSEUP=128
Star is 79 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 15.5 AU from the Sun and 14.6 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 8.0 arcsec/hr.
The 1-sigma error in the time of the event is 351 seconds.
The 1-sigma cross-track error in the shadow position is 5723 km.
The sky-plane scale is 10619.0 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, (2018/12/15 11:56UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.6 +16:32:45  0.8 26.45  76
Mirphak        03:25:41.1 +49:55:38  1.8 11.56  74
PPM 046963     04:19:27.2 +42:11:10  6.1  0.56  79
PPM 046894     04:15:18.2 +42:37:45  8.2  0.52  78
PPM 046938     04:17:51.2 +42:58:59 10.0  0.30  79
PPM 046961     04:19:21.8 +42:46:23 11.4  0.25  79
248835         04:18:06.3 +42:41:22 15.7        79
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 2.6 sigma about the mid-time.
The median site spacing is 17.9 km RECON observability=1.0 and success probability=6.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:52:24 -36.9 Dark Down 37.3 294.9 Up 11:37:24 - 12:07:24 3898
Tonasket 11:52:23 -36.9 Dark Down 37.2 295.1 Up 11:37:23 - 12:07:23 3876
Okanogan 11:52:23 -37.1 Dark Down 37.2 295.2 Up 11:37:23 - 12:07:23 3838
Brewster 11:52:23 -37.2 Dark Down 37.2 295.3 Up 11:37:23 - 12:07:23 3804
Manson/Chelan 11:52:23 -37.5 Dark Down 37.3 295.3 Up 11:37:23 - 12:07:23 3771
Entiat 11:52:22 -37.6 Dark Down 37.3 295.4 Up 11:37:22 - 12:07:22 3747
Niwot 11:51:49 -26.6 Dark Down 24.2 306.3 Low 11:36:49 - 12:06:49 3732
Wenatchee 11:52:22 -37.7 Dark Down 37.2 295.5 Up 11:37:22 - 12:07:22 3719
Ellensburg 11:52:22 -37.9 Dark Down 37.2 295.7 Up 11:37:22 - 12:07:22 3671
Pasco 11:52:19 -37.0 Dark Down 36.0 296.9 Up 11:37:19 - 12:07:19 3653
PNWRO 11:52:17 -36.8 Dark Down 35.7 297.1 Up 11:37:17 - 12:07:17 3638
Yakima 11:52:21 -37.9 Dark Down 37.0 295.9 Up 11:37:21 - 12:07:21 3631
Toppenish/White Swan 11:52:21 -37.8 Dark Down 36.8 296.2 Up 11:37:21 - 12:07:21 3616
George/Umatilla 11:52:18 -37.1 Dark Down 36.0 297.0 Up 11:37:18 - 12:07:18 3612
Goldendale 11:52:20 -38.2 Dark Down 36.9 296.3 Up 11:37:20 - 12:07:20 3546
The Dalles 11:52:21 -38.4 Dark Down 37.0 296.3 Up 11:37:21 - 12:07:21 3511
Maupin 11:52:20 -38.4 Dark Down 36.7 296.6 Up 11:37:20 - 12:07:20 3474
Madras/Culver 11:52:19 -38.5 Dark Down 36.5 297.0 Up 11:37:19 - 12:07:19 3419
Redmond 11:52:18 -38.5 Dark Down 36.4 297.2 Up 11:37:18 - 12:07:18 3382
Sisters 11:52:19 -38.8 Dark Down 36.6 297.0 Up 11:37:19 - 12:07:19 3369
Bend 11:52:18 -38.7 Dark Down 36.4 297.3 Up 11:37:18 - 12:07:18 3356
Oregon Observatory 11:52:19 -38.8 Dark Down 36.4 297.3 Up 11:37:19 - 12:07:19 3334
La Pine/Gilchrist 11:52:18 -38.8 Dark Down 36.3 297.4 Up 11:37:18 - 12:07:18 3312
North Lake 11:52:17 -38.4 Dark Down 35.7 298.0 Up 11:37:17 - 12:07:17 3293
Paisley 11:52:15 -38.2 Dark Down 35.2 298.5 Up 11:37:15 - 12:07:15 3253
Lakeview 11:52:14 -38.1 Dark Down 34.9 298.9 Up 11:37:14 - 12:07:14 3212
Chiloquin 11:52:18 -39.2 Dark Down 36.0 298.0 Up 11:37:18 - 12:07:18 3189
Klamath Falls 11:52:17 -39.1 Dark Down 35.8 298.2 Up 11:37:17 - 12:07:17 3159
Cedarville 11:52:13 -38.0 Dark Down 34.5 299.3 Up 11:37:13 - 12:07:13 3155
Tulelake 11:52:16 -38.9 Dark Down 35.5 298.5 Up 11:37:16 - 12:07:16 3144
Fall River/Burney 11:52:15 -38.9 Dark Down 35.0 299.1 Up 11:37:15 - 12:07:15 3059
Susanville 11:52:13 -38.3 Dark Down 34.2 299.8 Up 11:37:13 - 12:07:13 3027
Gimple 11:52:13 -38.5 Dark Down 34.2 299.9 Up 11:37:13 - 12:07:13 2992
Greenville 11:52:13 -38.6 Dark Down 34.3 299.8 Up 11:37:13 - 12:07:13 2989
Reno 11:52:10 -37.7 Dark Down 33.2 300.6 Up 11:37:10 - 12:07:10 2978
Portola 11:52:11 -38.2 Dark Down 33.8 300.2 Up 11:37:11 - 12:07:11 2976
Quincy 11:52:12 -38.6 Dark Down 34.2 300.0 Up 11:37:12 - 12:07:12 2969
Yerington 11:52:08 -37.2 Dark Down 32.5 301.2 Up 11:37:08 - 12:07:08 2953
Tonopah 11:52:04 -35.7 Dark Down 30.7 302.4 Up 11:37:04 - 12:07:04 2950
Carson City 11:52:09 -37.7 Dark Down 33.0 300.8 Up 11:37:09 - 12:07:09 2944
Hawthorne 11:52:06 -36.8 Dark Down 31.9 301.6 Up 11:37:06 - 12:07:06 2931
Gardnerville 11:52:09 -37.6 Dark Down 32.9 301.0 Up 11:37:09 - 12:07:09 2923
Indian Springs 11:51:59 -34.3 Dark Down 28.9 303.6 Low 11:36:59 - 12:06:59 2881
DCO 11:51:54 -32.2 Dark Down 26.4 305.1 Low 11:36:54 - 12:06:54 2869
Henderson 11:51:57 -33.7 Dark Down 28.2 304.1 Low 11:36:57 - 12:06:57 2865
Patrick 11:51:55 -32.8 Dark Down 27.1 304.8 Low 11:36:55 - 12:06:55 2861
Beatty 11:52:02 -35.2 Dark Down 29.8 303.1 Low 11:37:02 - 12:07:02 2861
Lee Vining 11:52:07 -37.1 Dark Down 32.0 301.7 Up 11:37:07 - 12:07:07 2855
Kingman/Dolan Springs 11:51:55 -32.9 Dark Down 27.1 304.8 Low 11:36:55 - 12:06:55 2831
Bishop 11:52:05 -36.5 Dark Down 31.2 302.3 Up 11:37:05 - 12:07:05 2830
Searchlight/Boulder City 11:51:57 -33.6 Dark Down 27.8 304.4 Low 11:36:57 - 12:06:57 2814
Laughlin/Bullhead City 11:51:56 -33.3 Dark Down 27.4 304.6 Low 11:36:56 - 12:06:56 2803
Mohave Valley 11:51:55 -33.3 Dark Down 27.2 304.7 Low 11:36:55 - 12:06:55 2778
Lone Pine 11:52:03 -36.2 Dark Down 30.5 302.8 Up 11:37:03 - 12:07:03 2773
Lake Havasu City 11:51:55 -33.0 Dark Down 26.9 305.0 Low 11:36:55 - 12:06:55 2754
Parker 11:51:55 -33.0 Dark Down 26.6 305.1 Low 11:36:55 - 12:06:55 2722
Blythe 11:51:55 -33.1 Dark Down 26.5 305.3 Low 11:36:55 - 12:06:55 2659
Yuma 11:51:54 -33.0 Dark Down 26.0 305.6 Low 11:36:54 - 12:06:54 2571
Calipatria 11:51:55 -33.8 Dark Down 26.9 305.2 Low 11:36:55 - 12:06:55 2566
Idyllwild 11:51:58 -34.9 Dark Down 28.0 304.6 Low 11:36:58 - 12:06:58 2565
CPSLO 11:52:07 -38.2 Dark Down 31.6 302.6 Up 11:37:07 - 12:07:07 2532
Wildwood 11:52:02 -36.5 Dark Down 29.5 303.8 Low 11:37:02 - 12:07:02 2509

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, (2018/12/15 11:56UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.45  76
Mirphak        03:24:19.4 +49:51:40  1.8 11.56  74
PPM 046963     04:18:08.2 +42:08:28  6.1  0.56  79
PPM 046894     04:13:59.0 +42:34:57  8.2  0.52  78
PPM 046938     04:16:31.7 +42:56:14 10.0  0.30  79
PPM 046961     04:18:02.3 +42:43:40 11.4  0.25  79
248835         04:16:46.9 +42:38:38 15.7        79
Positions are for J2000

Event circumstances last updated at 2017/08/03 16:27:05 UT

Marc W. Buie, Southwest Research Institute

RECON