RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-675-021968 with event index number of 94855

Geocentric closest approach at 2017/12/08 07:04:55 UTC

J2000 position of star is 03:41:46.2 +44:55:28
Equinox of date position of star is 03:42:59.6 +44:58:47
Stellar brightness R=15.3, use SENSEUP=128
Star is 78 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 14.9 AU from the Sun and 14.0 AU from the Earth.
The TNO is moving 23.1 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
The 1-sigma error in the time of the event is 340 seconds.
The 1-sigma cross-track error in the shadow position is 5327 km.
The sky-plane scale is 10149.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.3 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2017/12/08 07:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.1 +16:32:38  0.8 30.61  71
Mirphak        03:25:36.7 +49:55:25  1.8  5.75  80
PPM 046481     03:45:56.8 +46:09:18  6.1  1.28  77
PPM 046439     03:42:13.9 +44:58:55  7.8  0.14  78
248835         03:43:01.1 +44:58:52 15.3        78
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 23.7 km RECON observability=1.0 and success probability=9.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:04:22 -62.3 Dark Up 83.0 238.3 Up 06:49:22 - 07:19:22 822
Tonasket 07:04:23 -62.5 Dark Up 83.1 240.0 Up 06:49:23 - 07:19:23 798
Okanogan 07:04:24 -62.8 Dark Up 83.3 242.0 Up 06:49:24 - 07:19:24 769
Brewster 07:04:25 -63.0 Dark Up 83.6 243.4 Up 06:49:25 - 07:19:25 748
Manson/Chelan 07:04:27 -63.1 Dark Up 83.9 243.9 Up 06:49:27 - 07:19:27 739
Entiat 07:04:27 -63.3 Dark Up 84.0 245.5 Up 06:49:27 - 07:19:27 719
Wenatchee 07:04:28 -63.5 Dark Up 84.2 247.4 Up 06:49:28 - 07:19:28 697
Ellensburg 07:04:30 -63.8 Dark Up 84.5 250.7 Up 06:49:30 - 07:19:30 662
Yakima 07:04:31 -64.1 Dark Up 84.6 254.7 Up 06:49:31 - 07:19:31 622
Toppenish/White Swan 07:04:31 -64.4 Dark Up 84.5 257.3 Up 06:49:31 - 07:19:31 595
Goldendale 07:04:33 -64.7 Dark Up 84.9 262.4 Up 06:49:33 - 07:19:33 554
The Dalles 07:04:35 -64.8 Dark Up 85.2 264.4 Up 06:49:35 - 07:19:35 544
Pasco 07:04:27 -64.9 Dark Up 83.7 261.0 Up 06:49:27 - 07:19:27 541
George/Umatilla 07:04:28 -65.1 Dark Up 83.9 263.7 Up 06:49:28 - 07:19:28 514
PNWRO 07:04:27 -65.2 Dark Up 83.6 263.5 Up 06:49:27 - 07:19:27 509
Maupin 07:04:35 -65.2 Dark Up 85.2 269.4 Up 06:49:35 - 07:19:35 499
Madras/Culver 07:04:36 -65.7 Dark Up 85.2 275.9 Up 06:49:36 - 07:19:36 446
Sisters 07:04:39 -65.8 Dark Up 85.4 280.1 Up 06:49:39 - 07:19:39 428
Redmond 07:04:37 -66.0 Dark Up 85.1 280.1 Up 06:49:37 - 07:19:37 412
Bend 07:04:38 -66.1 Dark Up 85.2 282.7 Up 06:49:38 - 07:19:38 396
Oregon Observatory 07:04:39 -66.2 Dark Up 85.2 284.9 Up 06:49:39 - 07:19:39 383
La Pine/Gilchrist 07:04:39 -66.4 Dark Up 85.2 287.3 Up 06:49:39 - 07:19:39 365
North Lake 07:04:39 -67.0 Dark Up 84.7 290.8 Up 06:49:39 - 07:19:39 300
Chiloquin 07:04:43 -67.1 Dark Up 85.0 300.2 Up 06:49:43 - 07:19:43 267
Paisley 07:04:39 -67.6 Dark Up 84.2 295.2 Up 06:49:39 - 07:19:39 232
Klamath Falls 07:04:44 -67.5 Dark Up 84.8 303.1 Up 06:49:44 - 07:19:44 231
Tulelake 07:04:43 -67.8 Dark Up 84.4 304.4 Up 06:49:43 - 07:19:43 193
Lakeview 07:04:39 -68.1 Dark Up 83.8 299.0 Up 06:49:39 - 07:19:39 175
Cedarville 07:04:39 -68.7 Dark Up 83.4 303.5 Up 06:49:39 - 07:19:39 103
Fall River/Burney 07:04:45 -68.6 Dark Up 83.8 311.1 Up 06:49:45 - 07:19:45 102
Susanville 07:04:44 -69.4 Dark Up 83.0 312.4 Up 06:49:44 - 07:19:44 10
Greenville 07:04:46 -69.5 Dark Up 83.0 315.1 Up 06:49:46 - 07:19:46 -11
Gimple 07:04:45 -69.6 Dark Up 82.9 314.8 Up 06:49:45 - 07:19:45 -18
Quincy 07:04:46 -69.7 Dark Up 82.8 316.2 Up 06:49:46 - 07:19:46 -33
Portola 07:04:45 -70.0 Dark Up 82.5 315.2 Up 06:49:45 - 07:19:45 -58
Reno 07:04:43 -70.5 Dark Up 81.9 314.4 Up 06:49:43 - 07:19:43 -108
Carson City 07:04:44 -70.8 Dark Up 81.7 316.1 Up 06:49:44 - 07:19:44 -144
Gardnerville 07:04:44 -71.0 Dark Up 81.5 317.1 Up 06:49:44 - 07:19:44 -170
Yerington 07:04:42 -71.3 Dark Up 81.2 315.1 Up 06:49:42 - 07:19:42 -187
Hawthorne 07:04:41 -71.9 Dark Up 80.6 315.6 Up 06:49:41 - 07:19:41 -252
Lee Vining 07:04:44 -72.1 Dark Up 80.4 319.2 Up 06:49:44 - 07:19:44 -291
Tonopah 07:04:37 -72.8 Dark Up 79.4 314.0 Up 06:49:37 - 07:19:37 -349
Bishop 07:04:43 -72.9 Dark Up 79.6 319.4 Up 06:49:43 - 07:19:43 -377
Lone Pine 07:04:43 -73.7 Dark Up 78.8 321.1 Up 06:49:43 - 07:19:43 -464
Niwot 07:03:53 -72.5 Dark Up 72.7 293.6 Up 06:48:53 - 07:18:53 -474
Beatty 07:04:38 -74.0 Dark Up 78.4 317.1 Up 06:49:38 - 07:19:38 -480
CPSLO 07:04:54 -73.4 Dark Up 78.9 332.0 Up 06:49:54 - 07:19:54 -493
Indian Springs 07:04:35 -74.7 Dark Up 77.5 315.8 Up 06:49:35 - 07:19:35 -550
Henderson 07:04:33 -75.4 Dark Up 76.8 316.1 Up 06:49:33 - 07:19:33 -627
Searchlight/Boulder City 07:04:34 -76.0 Dark Up 76.3 317.6 Up 06:49:34 - 07:19:34 -687
Wildwood 07:04:49 -75.5 Dark Up 77.0 329.1 Up 06:49:49 - 07:19:49 -692
Patrick 07:04:30 -76.4 Dark Up 75.7 315.9 Up 06:49:30 - 07:19:30 -727
Laughlin/Bullhead City 07:04:33 -76.4 Dark Up 75.9 317.8 Up 06:49:33 - 07:19:33 -728
Kingman/Dolan Springs 07:04:32 -76.5 Dark Up 75.6 316.8 Up 06:49:32 - 07:19:32 -743
Mohave Valley 07:04:34 -76.6 Dark Up 75.7 318.5 Up 06:49:34 - 07:19:34 -755
DCO 07:04:28 -76.9 Dark Up 75.1 315.6 Up 06:49:28 - 07:19:28 -780
Idyllwild 07:04:44 -76.7 Dark Up 75.8 325.6 Up 06:49:44 - 07:19:44 -797
Lake Havasu City 07:04:34 -77.1 Dark Up 75.3 319.1 Up 06:49:34 - 07:19:34 -804
Parker 07:04:34 -77.4 Dark Up 75.0 319.9 Up 06:49:34 - 07:19:34 -840
Blythe 07:04:36 -77.8 Dark Up 74.7 321.6 Up 06:49:36 - 07:19:36 -882
Calipatria 07:04:41 -77.8 Dark Up 74.8 324.5 Up 06:49:41 - 07:19:41 -899
Yuma 07:04:38 -78.5 Dark Up 74.0 323.7 Up 06:49:38 - 07:19:38 -973

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, (2017/12/08 07:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 30.61  71
Mirphak        03:24:19.4 +49:51:40  1.8  5.75  80
PPM 046481     03:44:40.9 +46:05:59  6.1  1.28  77
PPM 046439     03:40:59.0 +44:55:31  7.8  0.14  78
248835         03:41:46.2 +44:55:28 15.3        78
Positions are for J2000

Event circumstances last updated at 2017/07/29 16:11:53 UT

Marc W. Buie, Southwest Research Institute

RECON