RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-667-025977 with event index number of 155121

Geocentric closest approach at 2018/10/18 07:10:01 UTC

J2000 position of star is 04:31:16.8 +43:16:25
Equinox of date position of star is 04:32:31.4 +43:18:37
Stellar brightness R=13.9, use SENSEUP=64
Star is 119 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 15.4 AU from the Sun and 14.8 AU from the Earth.
The TNO is moving 14.1 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 656 seconds.
The 1-sigma cross-track error in the shadow position is 4169 km.
The sky-plane scale is 10731.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 5.4 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2018/10/18 07:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.1 +16:32:44  0.8 26.78 118
3Iot Aur       04:58:13.2 +33:11:39  2.7 11.29 125
59 Per         04:44:14.6 +43:23:57  5.2  2.12 121
PPM 047168     04:34:41.3 +43:04:12  7.1  0.45 120
PPM 047119     04:31:46.8 +43:20:26  9.6  0.15 119
248835         04:32:36.6 +43:18:46 13.9       120
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 1.4 sigma about the mid-time.
The median site spacing is 22.4 km RECON observability=1.0 and success probability=11.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:14:07 -50.2 Dark Up 54.2 78.9 Up 06:59:07 - 07:29:07 -453
Tonasket 07:14:08 -50.5 Dark Up 54.2 78.6 Up 06:59:08 - 07:29:08 -475
Okanogan 07:14:09 -50.8 Dark Up 54.0 78.1 Up 06:59:09 - 07:29:09 -502
Brewster 07:14:11 -51.0 Dark Up 53.8 77.6 Up 06:59:11 - 07:29:11 -521
Manson/Chelan 07:14:13 -51.2 Dark Up 53.6 77.1 Up 06:59:13 - 07:29:13 -528
Entiat 07:14:14 -51.4 Dark Up 53.5 76.8 Up 06:59:14 - 07:29:14 -546
Wenatchee 07:14:16 -51.6 Dark Up 53.3 76.4 Up 06:59:16 - 07:29:16 -567
Ellensburg 07:14:18 -52.0 Dark Up 53.1 75.8 Up 06:59:18 - 07:29:18 -598
Yakima 07:14:20 -52.4 Dark Up 53.0 75.2 Up 06:59:20 - 07:29:20 -636
Toppenish/White Swan 07:14:20 -52.6 Dark Up 53.1 75.1 Up 06:59:20 - 07:29:20 -663
Goldendale 07:14:23 -53.1 Dark Up 52.6 74.2 Up 06:59:23 - 07:29:23 -700
The Dalles 07:14:26 -53.2 Dark Up 52.3 73.7 Up 06:59:26 - 07:29:26 -708
Pasco 07:14:16 -52.9 Dark Up 53.9 75.5 Up 06:59:16 - 07:29:16 -721
George/Umatilla 07:14:18 -53.2 Dark Up 53.6 75.0 Up 06:59:18 - 07:29:18 -746
Maupin 07:14:27 -53.7 Dark Up 52.3 73.2 Up 06:59:27 - 07:29:27 -752
PNWRO 07:14:16 -53.2 Dark Up 54.0 75.3 Up 06:59:16 - 07:29:16 -753
Madras/Culver 07:14:29 -54.2 Dark Up 52.1 72.5 Up 06:59:29 - 07:29:29 -803
Sisters 07:14:32 -54.4 Dark Up 51.7 72.0 Up 06:59:32 - 07:29:32 -817
Redmond 07:14:30 -54.5 Dark Up 52.0 72.1 Up 06:59:30 - 07:29:30 -835
Bend 07:14:32 -54.7 Dark Up 51.8 71.8 Up 06:59:32 - 07:29:32 -850
Oregon Observatory 07:14:33 -54.8 Dark Up 51.7 71.5 Up 06:59:33 - 07:29:33 -862
La Pine/Gilchrist 07:14:34 -55.0 Dark Up 51.6 71.2 Up 06:59:34 - 07:29:34 -879
North Lake 07:14:33 -55.6 Dark Up 51.8 71.0 Up 06:59:33 - 07:29:33 -944
Chiloquin 07:14:39 -56.0 Dark Up 51.0 69.8 Up 06:59:39 - 07:29:39 -971
Klamath Falls 07:14:40 -56.4 Dark Up 50.9 69.4 Up 06:59:40 - 07:29:40 -1008
Paisley 07:14:34 -56.2 Dark Up 51.9 70.4 Up 06:59:34 - 07:29:34 -1012
Tulelake 07:14:40 -56.7 Dark Up 51.0 69.2 Up 06:59:40 - 07:29:40 -1046
Lakeview 07:14:35 -56.7 Dark Up 51.9 69.9 Up 06:59:35 - 07:29:35 -1068
Fall River/Burney 07:14:43 -57.6 Dark Up 50.7 68.2 Up 06:59:43 - 07:29:43 -1137
Cedarville 07:14:37 -57.4 Dark Up 51.8 69.2 Up 06:59:37 - 07:29:37 -1139
Susanville 07:14:42 -58.3 Dark Up 51.0 67.7 Up 06:59:42 - 07:29:42 -1228
Greenville 07:14:44 -58.5 Dark Up 50.7 67.3 Up 06:59:44 - 07:29:44 -1243
Gimple 07:14:44 -58.6 Dark Up 50.8 67.4 Up 06:59:44 - 07:29:44 -1246
Quincy 07:14:45 -58.7 Dark Up 50.7 67.1 Up 06:59:45 - 07:29:45 -1262
Portola 07:14:43 -59.0 Dark Up 50.9 67.1 Up 06:59:43 - 07:29:43 -1294
Reno 07:14:41 -59.4 Dark Up 51.3 67.0 Up 06:59:41 - 07:29:41 -1346
Carson City 07:14:43 -59.7 Dark Up 51.2 66.6 Up 06:59:43 - 07:29:43 -1382
Gardnerville 07:14:43 -60.0 Dark Up 51.1 66.3 Up 06:59:43 - 07:29:43 -1408
Yerington 07:14:41 -60.0 Dark Up 51.5 66.5 Up 06:59:41 - 07:29:41 -1427
Hawthorne 07:14:40 -60.6 Dark Up 51.7 66.1 Up 06:59:40 - 07:29:40 -1494
Lee Vining 07:14:44 -61.0 Dark Up 51.2 65.3 Up 06:59:44 - 07:29:44 -1530
Tonopah 07:14:35 -61.2 Dark Up 52.5 65.8 Up 06:59:35 - 07:29:35 -1597
Bishop 07:14:42 -61.7 Dark Up 51.4 64.8 Up 06:59:42 - 07:29:42 -1618
Lone Pine 07:14:43 -62.5 Dark Up 51.3 64.0 Up 06:59:43 - 07:29:43 -1707
CPSLO 07:14:58 -63.2 Dark Up 48.9 62.2 Up 06:59:58 - 07:29:58 -1725
Beatty 07:14:36 -62.4 Dark Up 52.4 64.5 Up 06:59:36 - 07:29:36 -1730
Niwot 07:13:34 -58.9 Dark Down 61.8 71.0 Up 06:58:34 - 07:28:34 -1796
Indian Springs 07:14:33 -62.9 Dark Up 53.0 64.3 Up 06:59:33 - 07:29:33 -1805
Henderson 07:14:30 -63.5 Dark Up 53.3 63.7 Up 06:59:30 - 07:29:30 -1885
Wildwood 07:14:52 -64.9 Dark Up 49.8 61.2 Up 06:59:52 - 07:29:52 -1932
Searchlight/Boulder City 07:14:32 -64.1 Dark Up 53.1 63.1 Up 06:59:32 - 07:29:32 -1945
Laughlin/Bullhead City 07:14:31 -64.4 Dark Up 53.2 62.7 Up 06:59:31 - 07:29:31 -1988
Patrick 07:14:27 -64.2 Dark Up 53.8 63.1 Up 06:59:27 - 07:29:27 -1991
Kingman/Dolan Springs 07:14:29 -64.4 Dark Up 53.6 62.8 Up 06:59:29 - 07:29:29 -2006
Mohave Valley 07:14:31 -64.6 Dark Up 53.1 62.4 Up 06:59:31 - 07:29:31 -2016
Idyllwild 07:14:45 -65.6 Dark Up 51.0 61.0 Up 06:59:45 - 07:29:45 -2047
DCO 07:14:25 -64.5 Dark Up 54.2 62.8 Up 06:59:25 - 07:29:25 -2048
Lake Havasu City 07:14:31 -65.1 Dark Up 53.1 62.0 Up 06:59:31 - 07:29:31 -2066
Parker 07:14:32 -65.4 Dark Up 52.9 61.6 Up 06:59:32 - 07:29:32 -2102
Blythe 07:14:35 -65.9 Dark Up 52.4 60.9 Up 06:59:35 - 07:29:35 -2143
Calipatria 07:14:40 -66.3 Dark Up 51.5 60.4 Up 06:59:40 - 07:29:40 -2155
Yuma 07:14:37 -66.8 Dark Up 52.0 59.9 Up 06:59:37 - 07:29:37 -2234

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, (2018/10/18 07:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.78 118
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.29 125
59 Per         04:42:54.3 +43:21:54  5.2  2.12 121
PPM 047168     04:33:21.7 +43:01:54  7.1  0.45 120
PPM 047119     04:30:27.1 +43:18:04  9.6  0.15 119
248835         04:31:16.8 +43:16:25 13.9       119
Positions are for J2000

Event circumstances last updated at 2017/08/02 16:57:51 UT

Marc W. Buie, Southwest Research Institute

RECON