RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star UC4-667-025918 with event index number of 155122

Geocentric closest approach at 2018/10/20 07:28:37 UTC

J2000 position of star is 04:30:55.4 +43:16:45
Equinox of date position of star is 04:32:11.9 +43:19:01
Stellar brightness R=16.3, use SENSEUP=128
Star is 98 degrees from the moon. Moon is 81% 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 14.8 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 145 seconds.
The 1-sigma cross-track error in the shadow position is 1043 km.
The sky-plane scale is 10717.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 5.1 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2018/10/20 07:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.1 +16:32:44  0.8 26.79  94
3Iot Aur       04:58:13.3 +33:11:39  2.7 11.33 101
59 Per         04:44:14.6 +43:23:57  5.2  2.18 100
PPM 047168     04:34:41.3 +43:04:12  7.1  0.51  98
PPM 047119     04:31:46.8 +43:20:26  9.6  0.09  98
248835         04:32:15.1 +43:19:06 16.3        98
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 22.9 km RECON observability=1.0 and success probability=33.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:32:07 -51.4 Dark Up 58.5 82.8 Up 07:19:34 - 07:44:40 -343
Tonasket 07:32:08 -51.6 Dark Up 58.5 82.5 Up 07:19:35 - 07:44:41 -366
Okanogan 07:32:10 -51.9 Dark Up 58.3 81.8 Up 07:19:37 - 07:44:43 -394
Brewster 07:32:12 -52.2 Dark Up 58.2 81.3 Up 07:19:39 - 07:44:45 -414
Manson/Chelan 07:32:13 -52.4 Dark Up 57.9 80.8 Up 07:19:40 - 07:44:46 -422
Entiat 07:32:15 -52.6 Dark Up 57.8 80.4 Up 07:19:42 - 07:44:48 -441
Wenatchee 07:32:16 -52.8 Dark Up 57.7 79.9 Up 07:19:43 - 07:44:49 -463
Ellensburg 07:32:18 -53.2 Dark Up 57.5 79.2 Up 07:19:45 - 07:44:51 -496
Yakima 07:32:20 -53.6 Dark Up 57.4 78.5 Up 07:19:47 - 07:44:53 -535
Toppenish/White Swan 07:32:20 -53.9 Dark Up 57.5 78.3 Up 07:19:47 - 07:44:53 -562
Goldendale 07:32:23 -54.4 Dark Up 57.1 77.3 Up 07:19:50 - 07:44:56 -601
The Dalles 07:32:25 -54.6 Dark Up 56.8 76.7 Up 07:19:52 - 07:44:58 -610
Pasco 07:32:15 -54.0 Dark Up 58.3 78.7 Up 07:19:42 - 07:44:48 -617
George/Umatilla 07:32:17 -54.4 Dark Up 58.1 78.1 Up 07:19:44 - 07:44:50 -642
PNWRO 07:32:15 -54.3 Dark Up 58.4 78.5 Up 07:19:42 - 07:44:48 -649
Maupin 07:32:26 -55.0 Dark Up 56.8 76.2 Up 07:19:53 - 07:44:59 -655
Madras/Culver 07:32:28 -55.5 Dark Up 56.6 75.4 Up 07:19:55 - 07:45:01 -707
Sisters 07:32:31 -55.8 Dark Up 56.2 74.7 Up 07:19:58 - 07:45:04 -724
Redmond 07:32:30 -55.9 Dark Up 56.5 74.8 Up 07:19:57 - 07:45:03 -741
Bend 07:32:31 -56.1 Dark Up 56.3 74.4 Up 07:19:58 - 07:45:04 -757
Oregon Observatory 07:32:32 -56.2 Dark Up 56.2 74.1 Up 07:19:59 - 07:45:05 -769
La Pine/Gilchrist 07:32:33 -56.4 Dark Up 56.1 73.8 Up 07:20:00 - 07:45:06 -787
North Lake 07:32:32 -56.9 Dark Up 56.4 73.4 Up 07:19:59 - 07:45:05 -852
Chiloquin 07:32:38 -57.5 Dark Up 55.5 72.1 Up 07:20:05 - 07:45:11 -883
Paisley 07:32:32 -57.5 Dark Up 56.5 72.8 Up 07:19:59 - 07:45:05 -919
Klamath Falls 07:32:38 -57.8 Dark Up 55.5 71.7 Up 07:20:05 - 07:45:11 -920
Tulelake 07:32:38 -58.1 Dark Up 55.6 71.4 Up 07:20:05 - 07:45:11 -957
Lakeview 07:32:33 -58.0 Dark Up 56.5 72.1 Up 07:20:00 - 07:45:06 -976
Cedarville 07:32:35 -58.7 Dark Up 56.4 71.2 Up 07:20:02 - 07:45:08 -1048
Fall River/Burney 07:32:41 -59.1 Dark Up 55.4 70.2 Up 07:20:08 - 07:45:14 -1050
Susanville 07:32:40 -59.8 Dark Up 55.7 69.5 Up 07:20:07 - 07:45:13 -1141
Greenville 07:32:42 -60.0 Dark Up 55.4 69.1 Up 07:20:09 - 07:45:15 -1157
Gimple 07:32:42 -60.0 Dark Up 55.4 69.1 Up 07:20:09 - 07:45:15 -1160
Quincy 07:32:42 -60.2 Dark Up 55.3 68.8 Up 07:20:09 - 07:45:15 -1177
Portola 07:32:41 -60.4 Dark Up 55.6 68.8 Up 07:20:08 - 07:45:14 -1208
Reno 07:32:38 -60.7 Dark Up 56.0 68.5 Up 07:20:05 - 07:45:11 -1259
Carson City 07:32:40 -61.1 Dark Up 55.9 68.1 Up 07:20:07 - 07:45:13 -1295
Gardnerville 07:32:40 -61.3 Dark Up 55.8 67.7 Up 07:20:07 - 07:45:13 -1321
Yerington 07:32:38 -61.3 Dark Up 56.2 67.9 Up 07:20:05 - 07:45:11 -1339
Hawthorne 07:32:37 -61.8 Dark Up 56.4 67.4 Up 07:20:04 - 07:45:10 -1405
Lee Vining 07:32:40 -62.3 Dark Up 55.9 66.5 Up 07:20:07 - 07:45:13 -1443
Tonopah 07:32:31 -62.3 Dark Up 57.3 66.9 Up 07:19:58 - 07:45:04 -1504
Bishop 07:32:38 -63.0 Dark Up 56.2 65.8 Up 07:20:05 - 07:45:11 -1531
Lone Pine 07:32:39 -63.7 Dark Up 56.1 64.8 Up 07:20:06 - 07:45:12 -1620
Beatty 07:32:32 -63.4 Dark Up 57.1 65.3 Up 07:19:59 - 07:45:05 -1638
CPSLO 07:32:54 -64.8 Dark Up 53.7 62.9 Up 07:20:21 - 07:45:27 -1648
Niwot 07:31:30 -58.5 Dark Up 66.6 71.9 Up 07:18:57 - 07:44:03 -1660
Indian Springs 07:32:28 -63.8 Dark Up 57.8 64.9 Up 07:19:55 - 07:45:01 -1710
Henderson 07:32:26 -64.3 Dark Up 58.0 64.2 Up 07:19:53 - 07:44:59 -1789
Searchlight/Boulder City 07:32:27 -64.8 Dark Up 57.8 63.4 Up 07:19:54 - 07:45:00 -1850
Wildwood 07:32:47 -66.2 Dark Up 54.6 61.5 Up 07:20:14 - 07:45:20 -1851
Patrick 07:32:22 -64.8 Dark Up 58.6 63.3 Up 07:19:49 - 07:44:55 -1892
Laughlin/Bullhead City 07:32:27 -65.1 Dark Up 57.9 62.9 Up 07:19:54 - 07:45:00 -1892
Kingman/Dolan Springs 07:32:24 -65.0 Dark Up 58.3 63.0 Up 07:19:51 - 07:44:57 -1908
Mohave Valley 07:32:27 -65.4 Dark Up 57.8 62.6 Up 07:19:54 - 07:45:00 -1920
DCO 07:32:20 -65.0 Dark Up 58.9 62.8 Up 07:19:47 - 07:44:53 -1948
Idyllwild 07:32:40 -66.6 Dark Up 55.8 61.1 Up 07:20:07 - 07:45:13 -1960
Lake Havasu City 07:32:27 -65.7 Dark Up 57.8 62.0 Up 07:19:54 - 07:45:00 -1970
Parker 07:32:27 -66.1 Dark Up 57.7 61.5 Up 07:19:54 - 07:45:00 -2007
Blythe 07:32:30 -66.6 Dark Up 57.2 60.8 Up 07:19:57 - 07:45:03 -2050
Calipatria 07:32:35 -67.2 Dark Up 56.3 60.2 Up 07:20:02 - 07:45:08 -2066
Yuma 07:32:32 -67.6 Dark Up 56.7 59.6 Up 07:19:59 - 07:45:05 -2143

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, (2018/10/20 07:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.79  94
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.33 101
59 Per         04:42:54.3 +43:21:54  5.2  2.18 100
PPM 047168     04:33:21.7 +43:01:54  7.1  0.51  98
PPM 047119     04:30:27.1 +43:18:04  9.6  0.09  98
248835         04:30:55.4 +43:16:45 16.3        98
Positions are for J2000

Event circumstances last updated at 2018/01/18 17:12:33 UT

Marc W. Buie, Southwest Research Institute

RECON