RECON: TNO occultation with 503858

Event between (503858) 98HQ151 and star GA0760:15138961 with event index number of 227533

Geocentric closest approach at 2018/06/14 09:06:13 UTC

J2000 position of star is 18:34:18.3 -13:49:34
Equinox of date position of star is 18:35:20.9 -13:48:39
Stellar brightness G=15.1, use SENSEUP=128
Star is 170 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 32.2 AU from the Sun and 31.2 AU from the Earth.
The TNO is moving 22.8 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 254 seconds.
The 1-sigma cross-track error in the shadow position is 1604 km.
The sky-plane scale is 22626.4 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 4.6 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 503858, (2018/06/14 09:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.5 -26:28:17  0.9 31.79 157
Nunki          18:56:24.5 -26:16:20  2.0 13.40 167
PPM 234707     18:34:42.3 -14:50:19  6.1  1.04 171
PPM 234699     18:34:25.9 -14:05:33  7.7  0.36 171
PPM 234725     18:35:21.4 -13:28:12  8.8  0.34 170
503858         18:35:21.0 -13:48:39 15.1       170
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 3.5 sigma about the mid-time.
The median site spacing is 15.4 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 09:06:17 -15.7 AT Down 26.6 181.1 Low 08:51:17 - 09:21:17 9129
Oroville 09:06:18 -16.2 AT Down 27.2 181.3 Low 08:51:18 - 09:21:18 9099
Tonasket 09:06:17 -16.4 AT Down 27.5 181.3 Low 08:51:17 - 09:21:17 9087
Okanogan 09:06:17 -16.8 AT Down 27.8 181.1 Low 08:51:17 - 09:21:17 9069
Brewster 09:06:18 -17.1 AT Down 28.1 180.9 Low 08:51:18 - 09:21:18 9055
Manson/Chelan 09:06:20 -17.3 AT Down 28.3 180.5 Low 08:51:20 - 09:21:20 9043
Entiat 09:06:20 -17.6 AT Down 28.5 180.4 Low 08:51:20 - 09:21:20 9032
Wenatchee 09:06:20 -17.8 AT Down 28.8 180.3 Low 08:51:20 - 09:21:20 9018
Ellensburg 09:06:21 -18.3 Dark Down 29.2 180.1 Low 08:51:21 - 09:21:21 8995
Yakima 09:06:20 -18.7 Dark Down 29.6 180.1 Low 08:51:20 - 09:21:20 8973
Toppenish/White Swan 09:06:20 -18.8 Dark Down 29.8 180.3 Low 08:51:20 - 09:21:20 8961
Pasco 09:06:15 -18.7 Dark Down 29.9 181.7 Low 08:51:15 - 09:21:15 8957
PNWRO 09:06:16 -18.9 Dark Down 30.1 181.9 Up 08:51:16 - 09:21:16 8944
George/Umatilla 09:06:16 -19.1 Dark Down 30.2 181.4 Up 08:51:16 - 09:21:16 8938
Goldendale 09:06:21 -19.5 Dark Down 30.4 179.8 Up 08:51:21 - 09:21:21 8930
The Dalles 09:06:22 -19.7 Dark Down 30.6 179.4 Up 08:51:22 - 09:21:22 8916
Maupin 09:06:23 -20.1 Dark Down 31.0 179.5 Up 08:51:23 - 09:21:23 8892
Madras/Culver 09:06:23 -20.7 Dark Down 31.5 179.4 Up 08:51:23 - 09:21:23 8861
Sisters 09:06:24 -21.1 Dark Down 31.9 178.9 Up 08:51:24 - 09:21:24 8840
Redmond 09:06:23 -21.0 Dark Down 31.9 179.4 Up 08:51:23 - 09:21:23 8840
Bend 09:06:23 -21.2 Dark Down 32.1 179.2 Up 08:51:23 - 09:21:23 8827
Oregon Observatory 09:06:24 -21.4 Dark Down 32.3 179.1 Up 08:51:24 - 09:21:24 8816
La Pine/Gilchrist 09:06:24 -21.6 Dark Down 32.5 179.0 Up 08:51:24 - 09:21:24 8804
North Lake 09:06:22 -22.0 Dark Down 32.9 179.7 Up 08:51:22 - 09:21:22 8779
Paisley 09:06:21 -22.4 Dark Down 33.5 180.1 Up 08:51:21 - 09:21:21 8746
Chiloquin 09:06:25 -22.8 Dark Down 33.6 178.6 Up 08:51:25 - 09:21:25 8735
Lakeview 09:06:20 -22.9 Dark Down 34.0 180.3 Up 08:51:20 - 09:21:20 8716
Klamath Falls 09:06:25 -23.1 Dark Down 33.9 178.7 Up 08:51:25 - 09:21:25 8714
Tulelake 09:06:24 -23.3 Dark Down 34.2 179.0 Up 08:51:24 - 09:21:24 8698
Cedarville 09:06:19 -23.5 Dark Down 34.6 180.5 Up 08:51:19 - 09:21:19 8675
Fall River/Burney 09:06:24 -24.2 Dark Down 35.1 179.1 Up 08:51:24 - 09:21:24 8641
Susanville 09:06:20 -24.6 Dark Down 35.8 180.0 Up 08:51:20 - 09:21:20 8602
Gimple 09:06:22 -24.9 Dark Down 36.0 179.7 Up 08:51:22 - 09:21:22 8584
Greenville 09:06:21 -25.0 Dark Down 36.0 179.6 Up 08:51:21 - 09:21:21 8584
Niwot 09:05:25 -20.3 Dark Down 34.2 198.0 Up 08:50:25 - 09:20:25 8578
Quincy 09:06:22 -25.1 Dark Down 36.2 179.6 Up 08:51:22 - 09:21:22 8570
Portola 09:06:20 -25.2 Dark Down 36.4 180.2 Up 08:51:20 - 09:21:20 8563
Reno 09:06:17 -25.3 Dark Down 36.6 181.0 Up 08:51:17 - 09:21:17 8547
Carson City 09:06:18 -25.6 Dark Down 37.0 181.0 Up 08:51:18 - 09:21:18 8523
Yerington 09:06:15 -25.7 Dark Down 37.2 181.8 Up 08:51:15 - 09:21:15 8512
Gardnerville 09:06:17 -25.8 Dark Down 37.2 181.1 Up 08:51:17 - 09:21:17 8507
Hawthorne 09:06:13 -26.0 Dark Down 37.6 182.4 Up 08:51:13 - 09:21:13 8481
Tonopah 09:06:08 -26.1 Dark Down 38.0 184.1 Up 08:51:08 - 09:21:08 8452
Lee Vining 09:06:14 -26.6 Dark Down 38.2 181.8 Up 08:51:14 - 09:21:14 8442
Bishop 09:06:12 -27.0 Dark Down 38.8 182.7 Up 08:51:12 - 09:21:12 8402
Beatty 09:06:05 -27.0 Dark Down 39.1 184.8 Up 08:51:05 - 09:21:05 8372
Indian Springs 09:06:02 -27.0 Dark Down 39.4 186.1 Up 08:51:02 - 09:21:02 8350
Lone Pine 09:06:10 -27.7 Dark Down 39.5 183.2 Up 08:51:10 - 09:21:10 8349
Henderson 09:05:58 -27.3 Dark Down 39.9 187.0 Up 08:50:58 - 09:20:58 8312
Searchlight/Boulder City 09:05:58 -27.8 Dark Down 40.4 187.2 Up 08:50:58 - 09:20:58 8271
Patrick 09:05:54 -27.6 Dark Down 40.4 188.5 Up 08:50:54 - 09:20:54 8267
Kingman/Dolan Springs 09:05:54 -27.8 Dark Down 40.6 188.3 Up 08:50:54 - 09:20:54 8251
CPSLO 09:06:20 -29.5 Dark Down 40.9 180.0 Up 08:51:20 - 09:21:20 8251
Laughlin/Bullhead City 09:05:57 -28.0 Dark Down 40.7 187.6 Up 08:50:57 - 09:20:57 8250
DCO 09:05:51 -27.6 Dark Down 40.6 189.4 Up 08:50:51 - 09:20:51 8245
Mohave Valley 09:05:56 -28.3 Dark Down 41.0 187.7 Up 08:50:56 - 09:20:56 8230
Lake Havasu City 09:05:55 -28.5 Dark Down 41.3 188.0 Up 08:50:55 - 09:20:55 8200
Parker 09:05:55 -28.9 Dark Down 41.7 188.1 Up 08:50:55 - 09:20:55 8174
Wildwood 09:06:12 -30.2 Dark Down 42.0 182.6 Up 08:51:12 - 09:21:12 8166
Idyllwild 09:06:05 -30.0 Dark Down 42.3 185.1 Up 08:51:05 - 09:21:05 8142
Blythe 09:05:56 -29.4 Dark Down 42.2 187.8 Up 08:50:56 - 09:20:56 8135
Calipatria 09:06:00 -30.2 Dark Down 42.8 186.6 Up 08:51:00 - 09:21:00 8098
Yuma 09:05:56 -30.3 Dark Down 43.1 187.9 Up 08:50:56 - 09:20:56 8065

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 503858, (2018/06/14 09:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.79 157
Nunki          18:55:15.9 -26:17:49  2.0 13.40 167
PPM 234707     18:33:39.1 -14:51:14  6.1  1.04 171
PPM 234699     18:33:23.0 -14:06:27  7.7  0.36 171
PPM 234725     18:34:18.8 -13:29:08  8.8  0.34 170
503858         18:34:18.3 -13:49:34 15.1       170
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:08:18 UT

Marc W. Buie, Southwest Research Institute

RECON