RECON: TNO occultation with 98KY61

Event between 98KY61 and star UC4-384-155727 with event index number of 129160

Geocentric closest approach at 2018/06/22 08:27:46 UTC

J2000 position of star is 21:58:29.8 -13:14:13
Equinox of date position of star is 21:59:23.2 -13:09:27
Stellar brightness R=12.0
Star is 123 degrees from the moon. Moon is 70% illuminated.
TNO apparent brightness V=24.0

[RECON map]
TNO is 46.2 AU from the Sun and 45.6 AU from the Earth.
The TNO is moving 11.8 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 742 seconds.
The 1-sigma cross-track error in the shadow position is 2839 km.
The sky-plane scale is 33075.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 17.7 sec chord
Diameter=85.3 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98KY61, (2018/06/22 08:28UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:40.0 -29:31:26  1.2 21.35 129
51Mu Cap       21:54:18.0 -13:27:51  5.1  1.30 122
PPM 239608     21:59:29.5 -13:09:48  7.6  0.02 123
98KY61         21:59:29.6 -13:08:53 12.0       123
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 1.2 sigma about the mid-time.
The median site spacing is 16.5 km RECON observability=0.4 and success probability=3.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:28:49 -17.3 AT Up 13.1 128.7 Really Low 08:13:49 - 08:43:49 -851
Tonasket 08:28:49 -17.6 AT Up 13.2 128.6 Really Low 08:13:49 - 08:43:49 -863
Okanogan 08:28:49 -17.9 AT Up 13.4 128.4 Really Low 08:13:49 - 08:43:49 -882
Brewster 08:28:49 -18.2 Dark Up 13.4 128.2 Really Low 08:13:49 - 08:43:49 -900
Goldendale 08:29:34 -20.5 Dark Up 14.4 127.1 Really Low 08:14:34 - 08:44:34 -915
Manson/Chelan 08:28:49 -18.4 Dark Up 13.4 127.9 Really Low 08:13:49 - 08:43:49 -917
The Dalles 08:29:38 -20.8 Dark Up 14.3 126.7 Really Low 08:14:38 - 08:44:38 -922
Entiat 08:28:49 -18.7 Dark Up 13.5 127.8 Really Low 08:13:49 - 08:43:49 -931
Maupin 08:29:41 -21.2 Dark Up 14.6 126.7 Really Low 08:14:41 - 08:44:41 -937
Wenatchee 08:28:49 -18.9 Dark Up 13.6 127.6 Really Low 08:13:49 - 08:43:49 -949
Madras/Culver 08:29:44 -21.7 Dark Up 14.9 126.6 Really Low 08:14:44 - 08:44:44 -957
Sisters 08:29:49 -22.1 Dark Up 14.9 126.2 Really Low 08:14:49 - 08:44:49 -967
Redmond 08:29:47 -22.1 Dark Up 15.1 126.5 Really Low 08:14:47 - 08:44:47 -970
Bend 08:29:49 -22.3 Dark Up 15.2 126.3 Really Low 08:14:49 - 08:44:49 -977
Ellensburg 08:28:49 -19.4 Dark Up 13.7 127.4 Really Low 08:13:49 - 08:43:49 -979
Oregon Observatory 08:29:51 -22.5 Dark Up 15.2 126.2 Really Low 08:14:51 - 08:44:51 -983
La Pine/Gilchrist 08:29:53 -22.7 Dark Up 15.3 126.1 Really Low 08:14:53 - 08:44:53 -991
Pasco 08:28:49 -20.0 Dark Up 14.9 128.4 Really Low 08:13:49 - 08:43:49 -1006
Yakima 08:28:49 -19.8 Dark Up 13.9 127.3 Really Low 08:13:49 - 08:43:49 -1007
North Lake 08:29:53 -23.1 Dark Up 15.9 126.5 Really Low 08:14:53 - 08:44:53 -1011
PNWRO 08:28:49 -20.2 Dark Up 15.2 128.5 Really Low 08:13:49 - 08:43:49 -1018
Toppenish/White Swan 08:28:49 -20.0 Dark Up 14.2 127.4 Really Low 08:13:49 - 08:43:49 -1019
George/Umatilla 08:28:49 -20.3 Dark Up 15.0 128.2 Really Low 08:13:49 - 08:43:49 -1032
Chiloquin 08:30:02 -23.8 Dark Up 15.8 125.6 Really Low 08:15:02 - 08:45:02 -1034
Paisley 08:29:56 -23.6 Dark Up 16.5 126.7 Really Low 08:14:56 - 08:44:56 -1036
Klamath Falls 08:30:03 -24.2 Dark Up 16.0 125.6 Really Low 08:15:03 - 08:45:03 -1049
Lakeview 08:29:59 -24.1 Dark Up 16.9 126.7 Really Low 08:14:59 - 08:44:59 -1058
Tulelake 08:30:04 -24.4 Dark Up 16.4 125.8 Really Low 08:15:04 - 08:45:04 -1062
Cedarville 08:30:02 -24.7 Dark Up 17.4 126.7 Really Low 08:15:02 - 08:45:02 -1087
Fall River/Burney 08:30:10 -25.3 Dark Up 16.9 125.6 Really Low 08:15:10 - 08:45:10 -1101
Susanville 08:30:11 -25.9 Dark Up 17.8 126.1 Really Low 08:15:11 - 08:45:11 -1133
Greenville 08:30:15 -26.2 Dark Up 17.8 125.8 Really Low 08:15:15 - 08:45:15 -1144
Quincy 08:30:17 -26.4 Dark Up 17.9 125.7 Really Low 08:15:17 - 08:45:17 -1154
Portola 08:30:14 -26.5 Dark Up 18.3 126.1 Really Low 08:15:14 - 08:45:14 -1162
Reno 08:30:12 -26.7 Dark Up 18.8 126.5 Really Low 08:15:12 - 08:45:12 -1178
Carson City 08:30:15 -27.0 Dark Up 19.0 126.4 Really Low 08:15:15 - 08:45:15 -1195
Gardnerville 08:30:16 -27.2 Dark Up 19.2 126.4 Really Low 08:15:16 - 08:45:16 -1207
Yerington 08:30:14 -27.1 Dark Up 19.6 126.9 Really Low 08:15:14 - 08:45:14 -1209
Hawthorne 08:30:14 -27.5 Dark Up 20.2 127.2 Low 08:15:14 - 08:45:14 -1235
Lee Vining 08:30:20 -28.2 Dark Up 20.2 126.6 Low 08:15:20 - 08:45:20 -1258
Tonopah 08:30:10 -27.8 Dark Up 21.3 128.1 Low 08:15:10 - 08:45:10 -1268
Bishop 08:30:21 -28.7 Dark Up 21.0 127.0 Low 08:15:21 - 08:45:21 -1294
Niwot 08:28:49 -23.4 Dark Down 26.5 139.0 Low 08:13:49 - 08:43:49 -1308
Beatty 08:30:15 -28.9 Dark Up 22.3 128.2 Low 08:15:15 - 08:45:15 -1331
Lone Pine 08:30:23 -29.4 Dark Up 21.7 127.1 Low 08:15:23 - 08:45:23 -1336
Indian Springs 08:30:12 -29.0 Dark Up 23.2 128.9 Low 08:15:12 - 08:45:12 -1358
CPSLO 08:30:45 -30.9 Dark Up 20.8 124.7 Low 08:15:45 - 08:45:45 -1388
Henderson 08:30:11 -29.4 Dark Up 24.0 129.3 Low 08:15:11 - 08:45:11 -1393
Searchlight/Boulder City 08:30:14 -30.0 Dark Up 24.4 129.2 Low 08:15:14 - 08:45:14 -1425
Patrick 08:30:09 -29.8 Dark Up 25.1 130.0 Low 08:15:09 - 08:45:09 -1438
Laughlin/Bullhead City 08:30:14 -30.2 Dark Up 24.8 129.3 Low 08:15:14 - 08:45:14 -1445
Kingman/Dolan Springs 08:30:11 -30.1 Dark Up 25.1 129.8 Low 08:15:11 - 08:45:11 -1448
Mohave Valley 08:30:16 -30.5 Dark Up 25.0 129.3 Low 08:15:16 - 08:45:16 -1460
DCO 08:30:07 -30.0 Dark Up 25.7 130.5 Low 08:15:07 - 08:45:07 -1463
Wildwood 08:30:43 -31.9 Dark Up 22.9 125.9 Low 08:15:43 - 08:45:43 -1468
Lake Havasu City 08:30:17 -30.8 Dark Up 25.4 129.3 Low 08:15:17 - 08:45:17 -1485
Idyllwild 08:30:35 -32.0 Dark Up 24.3 127.2 Low 08:15:35 - 08:45:35 -1503
Parker 08:30:18 -31.2 Dark Up 25.6 129.2 Low 08:15:18 - 08:45:18 -1505
Blythe 08:30:24 -31.7 Dark Up 25.8 128.8 Low 08:15:24 - 08:45:24 -1532
Calipatria 08:30:30 -32.4 Dark Up 25.5 127.9 Low 08:15:30 - 08:45:30 -1551
Yuma 08:30:29 -32.6 Dark Up 26.3 128.4 Low 08:15:29 - 08:45:29 -1585

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 98KY61, (2018/06/22 08:28UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 21.35 129
51Mu Cap       21:53:18.1 -13:33:06  5.1  1.30 122
PPM 239608     21:58:29.8 -13:15:08  7.6  0.02 123
98KY61         21:58:29.8 -13:14:13 12.0       123
Positions are for J2000

Event circumstances last updated at 2016/07/01 17:39:11 UT

Marc W. Buie, Southwest Research Institute

RECON