RECON: TNO occultation with 12HE85

Event between 12HE85 and star GA0700:32521269 with event index number of 205951

Geocentric closest approach at 2018/06/06 10:30:39 UTC

J2000 position of star is 19:13:48.0 -19:55:16
Equinox of date position of star is 19:14:53.1 -19:53:18
Stellar brightness G=16.5, use SENSEUP=128
Star is 55 degrees from the moon. Moon is 53% illuminated.
TNO apparent brightness V=25.1

[RECON map]
TNO is 40.3 AU from the Sun and 39.4 AU from the Earth.
The TNO is moving 19.9 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 310 seconds.
The 1-sigma cross-track error in the shadow position is 1568 km.
The sky-plane scale is 28577.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.0
Diameter=93.8 km assuming a 5% albedo -- 4.7 sec chord
Diameter=38.3 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is 9:5EEEE
 
 
 
 
 
 

Star training set for 12HE85, (2018/06/06 10:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.4 -26:28:17  0.9 38.18  92
Nunki          18:56:24.4 -26:16:20  2.0  7.67  59
PPM 235581     19:10:53.3 -19:46:23  6.4  0.95  56
PPM 235722     19:16:31.3 -19:45:13  8.1  0.41  54
PPM 235690     19:15:06.6 -19:53:35  9.2  0.05  55
12HE85         19:14:53.1 -19:53:18 16.5        55
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 2.9 sigma about the mid-time.
The median site spacing is 14.2 km RECON observability=0.7 and success probability=10.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 10:29:59 -10.2 CT Up 20.4 184.3 Low 10:14:59 - 10:44:59 -915
Oroville 10:29:58 -10.6 CT Up 21.0 184.4 Low 10:14:58 - 10:44:58 -940
Tonasket 10:29:58 -10.8 CT Up 21.3 184.4 Low 10:14:58 - 10:44:58 -949
Okanogan 10:29:59 -11.2 CT Up 21.6 184.3 Low 10:14:59 - 10:44:59 -962
Brewster 10:29:59 -11.5 CT Up 21.9 184.1 Low 10:14:59 - 10:44:59 -971
Manson/Chelan 10:30:01 -11.8 CT Up 22.1 183.7 Low 10:15:01 - 10:45:01 -977
Entiat 10:30:01 -12.0 CT Up 22.3 183.7 Low 10:15:01 - 10:45:01 -986
Wenatchee 10:30:01 -12.2 AT Up 22.6 183.6 Low 10:15:01 - 10:45:01 -996
Ellensburg 10:30:02 -12.6 AT Up 23.0 183.4 Low 10:15:02 - 10:45:02 -1013
Yakima 10:30:02 -13.0 AT Up 23.4 183.4 Low 10:15:02 - 10:45:02 -1031
Toppenish/White Swan 10:30:01 -13.1 AT Up 23.6 183.5 Low 10:15:01 - 10:45:01 -1042
Pasco 10:29:56 -12.7 AT Up 23.7 184.8 Low 10:14:56 - 10:44:56 -1058
Goldendale 10:30:03 -13.7 AT Up 24.2 183.1 Low 10:15:03 - 10:45:03 -1063
The Dalles 10:30:04 -14.0 AT Up 24.4 182.8 Low 10:15:04 - 10:45:04 -1071
PNWRO 10:29:55 -12.8 AT Up 23.9 185.1 Low 10:14:55 - 10:44:55 -1071
George/Umatilla 10:29:57 -13.0 AT Up 24.0 184.6 Low 10:14:57 - 10:44:57 -1071
Maupin 10:30:04 -14.3 AT Up 24.9 182.9 Low 10:15:04 - 10:45:04 -1091
Madras/Culver 10:30:04 -14.8 AT Up 25.4 182.8 Low 10:15:04 - 10:45:04 -1117
Sisters 10:30:06 -15.3 AT Up 25.7 182.4 Low 10:15:06 - 10:45:06 -1129
Redmond 10:30:04 -15.1 AT Up 25.8 182.8 Low 10:15:04 - 10:45:04 -1134
Bend 10:30:05 -15.4 AT Up 26.0 182.7 Low 10:15:05 - 10:45:05 -1143
Oregon Observatory 10:30:06 -15.5 AT Up 26.2 182.5 Low 10:15:06 - 10:45:06 -1150
La Pine/Gilchrist 10:30:06 -15.7 AT Up 26.4 182.5 Low 10:15:06 - 10:45:06 -1160
North Lake 10:30:03 -15.9 AT Up 26.8 183.1 Low 10:15:03 - 10:45:03 -1187
Chiloquin 10:30:07 -16.8 AT Up 27.5 182.1 Low 10:15:07 - 10:45:07 -1213
Paisley 10:30:02 -16.2 AT Up 27.3 183.5 Low 10:15:02 - 10:45:02 -1218
Klamath Falls 10:30:07 -17.1 AT Up 27.8 182.2 Low 10:15:07 - 10:45:07 -1232
Lakeview 10:30:01 -16.5 AT Up 27.8 183.7 Low 10:15:01 - 10:45:01 -1246
Tulelake 10:30:06 -17.1 AT Up 28.1 182.5 Low 10:15:06 - 10:45:06 -1248
Cedarville 10:30:00 -16.9 AT Up 28.5 183.9 Low 10:15:00 - 10:45:00 -1282
Fall River/Burney 10:30:06 -17.9 AT Up 29.0 182.7 Low 10:15:06 - 10:45:06 -1297
Susanville 10:30:02 -18.0 Dark Up 29.6 183.5 Low 10:15:02 - 10:45:02 -1338
Greenville 10:30:04 -18.4 Dark Up 29.9 183.2 Low 10:15:04 - 10:45:04 -1351
Gimple 10:30:03 -18.4 Dark Up 29.9 183.2 Low 10:15:03 - 10:45:03 -1352
Quincy 10:30:04 -18.6 Dark Up 30.1 183.2 Up 10:15:04 - 10:45:04 -1362
Portola 10:30:02 -18.5 Dark Up 30.2 183.7 Up 10:15:02 - 10:45:02 -1373
Reno 10:29:59 -18.4 Dark Up 30.4 184.4 Up 10:14:59 - 10:44:59 -1394
Carson City 10:29:59 -18.7 Dark Up 30.8 184.4 Up 10:14:59 - 10:44:59 -1415
Gardnerville 10:29:59 -18.8 Dark Up 31.0 184.5 Up 10:14:59 - 10:44:59 -1429
Yerington 10:29:56 -18.5 Dark Up 30.9 185.1 Up 10:14:56 - 10:44:56 -1432
Hawthorne 10:29:54 -18.6 Dark Up 31.4 185.7 Up 10:14:54 - 10:44:54 -1464
Lee Vining 10:29:56 -19.3 Dark Up 31.9 185.2 Up 10:14:56 - 10:44:56 -1493
Tonopah 10:29:48 -18.3 Dark Up 31.7 187.3 Up 10:14:48 - 10:44:48 -1506
Bishop 10:29:53 -19.4 Dark Up 32.5 186.0 Up 10:14:53 - 10:44:53 -1536
Niwot 10:28:59 -10.5 CT Up 27.6 199.6 Low 10:13:59 - 10:43:59 -1546
Beatty 10:29:46 -19.0 Dark Up 32.8 187.9 Up 10:14:46 - 10:44:46 -1581
Lone Pine 10:29:51 -19.9 Dark Up 33.2 186.5 Up 10:14:51 - 10:44:51 -1586
Indian Springs 10:29:41 -18.7 Dark Up 33.0 189.1 Up 10:14:41 - 10:44:41 -1614
CPSLO 10:30:03 -22.2 Dark Up 34.7 183.6 Up 10:15:03 - 10:45:03 -1641
Henderson 10:29:37 -18.7 Dark Up 33.4 189.9 Up 10:14:37 - 10:44:37 -1655
Searchlight/Boulder City 10:29:37 -19.1 Dark Up 34.0 190.0 Up 10:14:37 - 10:44:37 -1693
Patrick 10:29:33 -18.6 Dark Up 33.9 191.2 Up 10:14:33 - 10:44:33 -1709
Laughlin/Bullhead City 10:29:36 -19.2 Dark Up 34.2 190.4 Up 10:14:36 - 10:44:36 -1716
Kingman/Dolan Springs 10:29:33 -18.9 Dark Up 34.1 191.0 Up 10:14:33 - 10:44:33 -1721
Mohave Valley 10:29:36 -19.4 Dark Up 34.5 190.5 Up 10:14:36 - 10:44:36 -1734
DCO 10:29:30 -18.4 Dark Up 34.1 192.0 Up 10:14:30 - 10:44:30 -1738
Wildwood 10:29:54 -22.1 Dark Up 35.8 186.0 Up 10:14:54 - 10:44:54 -1740
Lake Havasu City 10:29:34 -19.5 Dark Up 34.9 190.8 Up 10:14:34 - 10:44:34 -1763
Idyllwild 10:29:45 -21.4 Dark Up 35.9 188.2 Up 10:14:45 - 10:44:45 -1784
Parker 10:29:34 -19.8 Dark Up 35.2 190.9 Up 10:14:34 - 10:44:34 -1786
Blythe 10:29:35 -20.3 Dark Up 35.8 190.6 Up 10:14:35 - 10:44:35 -1817
Calipatria 10:29:40 -21.2 Dark Up 36.4 189.6 Up 10:14:40 - 10:44:40 -1839
Yuma 10:29:35 -21.0 Dark Up 36.7 190.7 Up 10:14:35 - 10:44:35 -1879

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 12HE85, (2018/06/06 10:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.18  92
Nunki          18:55:15.9 -26:17:49  2.0  7.67  59
PPM 235581     19:09:48.2 -19:48:15  6.4  0.95  56
PPM 235722     19:15:26.3 -19:47:14  8.1  0.41  54
PPM 235690     19:14:01.5 -19:55:33  9.2  0.05  55
12HE85         19:13:48.0 -19:55:16 16.5        55
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:05:58 UT

Marc W. Buie, Southwest Research Institute

RECON