RECON: TNO occultation with 98HQ151

Event between 98HQ151 and star UC4-381-110875 with event index number of 132478

Geocentric closest approach at 2018/07/27 07:58:39 UTC

J2000 position of star is 18:30:00.0 -13:52:19
Equinox of date position of star is 18:30:59.8 -13:51:32
Stellar brightness R=16.0, use SENSEUP=128
Star is 23 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 32.2 AU from the Sun and 31.3 AU from the Earth.
The TNO is moving 20.6 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 270 seconds.
The 1-sigma cross-track error in the shadow position is 2140 km.
The sky-plane scale is 22699.3 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=106.2 km assuming a 5% albedo -- 5.1 sec chord
Diameter=43.3 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98HQ151, (2018/07/27 07:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.9 -26:28:18  0.9 30.85  49
Nunki          18:56:24.9 -26:16:19  2.0 13.76  17
PPM 234686     18:33:47.0 -14:51:03  5.1  1.19  22
PPM 234665     18:33:01.0 -13:59:33  8.2  0.50  22
PPM 234616     18:30:57.3 -14:03:27  9.2  0.20  23
98HQ151        18:31:03.2 -13:51:29 16.0        23
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 3.3 sigma about the mid-time.
The median site spacing is 14.3 km RECON observability=1.0 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:56:36 -21.9 Dark Up 22.7 208.7 Low 07:41:36 - 08:11:36 10626
Tonasket 07:56:36 -22.1 Dark Up 22.9 208.8 Low 07:41:36 - 08:11:36 10612
Okanogan 07:56:36 -22.4 Dark Up 23.3 208.7 Low 07:41:36 - 08:11:36 10595
Brewster 07:56:37 -22.7 Dark Up 23.6 208.6 Low 07:41:37 - 08:11:37 10582
Manson/Chelan 07:56:37 -22.9 Dark Up 23.9 208.2 Low 07:41:37 - 08:11:37 10576
Entiat 07:56:37 -23.1 Dark Up 24.1 208.2 Low 07:41:37 - 08:11:37 10564
Wenatchee 07:56:37 -23.4 Dark Up 24.4 208.2 Low 07:41:37 - 08:11:37 10551
Ellensburg 07:56:38 -23.8 Dark Up 24.8 208.0 Low 07:41:38 - 08:11:38 10530
Yakima 07:56:37 -24.2 Dark Up 25.2 208.1 Low 07:41:37 - 08:11:37 10505
Toppenish/White Swan 07:56:37 -24.4 Dark Up 25.3 208.3 Low 07:41:37 - 08:11:37 10489
Goldendale 07:56:36 -24.9 Dark Up 25.9 208.0 Low 07:41:36 - 08:11:36 10463
Pasco 07:56:32 -24.5 Dark Up 25.0 209.6 Low 07:41:32 - 08:11:32 10461
The Dalles 07:56:37 -25.1 Dark Up 26.2 207.7 Low 07:41:37 - 08:11:37 10454
George/Umatilla 07:56:32 -24.9 Dark Up 25.4 209.5 Low 07:41:32 - 08:11:32 10444
PNWRO 07:56:31 -24.8 Dark Up 25.1 209.9 Low 07:41:31 - 08:11:31 10442
Maupin 07:56:36 -25.5 Dark Up 26.6 207.9 Low 07:41:36 - 08:11:36 10427
Madras/Culver 07:56:36 -26.1 Dark Up 27.1 208.0 Low 07:41:36 - 08:11:36 10393
Sisters 07:56:37 -26.4 Dark Up 27.5 207.6 Low 07:41:37 - 08:11:37 10380
Redmond 07:56:36 -26.4 Dark Up 27.4 208.0 Low 07:41:36 - 08:11:36 10371
Bend 07:56:36 -26.7 Dark Up 27.7 207.9 Low 07:41:36 - 08:11:36 10360
Oregon Observatory 07:56:37 -26.8 Dark Up 27.8 207.8 Low 07:41:37 - 08:11:37 10351
La Pine/Gilchrist 07:56:36 -27.0 Dark Up 28.1 207.8 Low 07:41:36 - 08:11:36 10339
North Lake 07:56:34 -27.5 Dark Up 28.2 208.5 Low 07:41:34 - 08:11:34 10301
Chiloquin 07:56:36 -28.1 Dark Up 29.2 207.7 Low 07:41:36 - 08:11:36 10272
Paisley 07:56:32 -28.1 Dark Up 28.6 209.0 Low 07:41:32 - 08:11:32 10258
Klamath Falls 07:56:36 -28.5 Dark Up 29.4 207.9 Low 07:41:36 - 08:11:36 10248
Tulelake 07:56:34 -28.7 Dark Up 29.6 208.3 Low 07:41:34 - 08:11:34 10225
Lakeview 07:56:30 -28.6 Dark Up 29.0 209.4 Low 07:41:30 - 08:11:30 10221
Cedarville 07:56:29 -29.2 Dark Up 29.5 209.7 Low 07:41:29 - 08:11:29 10173
Fall River/Burney 07:56:33 -29.7 Dark Up 30.3 208.6 Up 07:41:33 - 08:11:33 10161
Susanville 07:56:29 -30.3 Dark Up 30.6 209.5 Up 07:41:29 - 08:11:29 10104
Greenville 07:56:30 -30.6 Dark Up 31.0 209.3 Up 07:41:30 - 08:11:30 10090
Gimple 07:56:30 -30.6 Dark Up 30.9 209.4 Up 07:41:30 - 08:11:30 10089
Quincy 07:56:30 -30.8 Dark Up 31.1 209.4 Up 07:41:30 - 08:11:30 10076
Portola 07:56:29 -30.9 Dark Up 31.1 209.9 Up 07:41:29 - 08:11:29 10059
Reno 07:56:28 -31.2 Dark Up 31.1 210.7 Up 07:41:28 - 08:11:28 10028
Carson City 07:56:28 -31.6 Dark Up 31.4 210.8 Up 07:41:28 - 08:11:28 10002
Gardnerville 07:56:28 -31.8 Dark Up 31.5 210.9 Up 07:41:28 - 08:11:28 9984
Yerington 07:56:28 -31.8 Dark Up 31.3 211.5 Up 07:41:28 - 08:11:28 9977
Hawthorne 07:56:28 -32.3 Dark Up 31.4 212.2 Up 07:41:28 - 08:11:28 9934
Lee Vining 07:56:28 -32.8 Dark Up 32.1 211.9 Up 07:41:28 - 08:11:28 9902
Tonopah 07:56:28 -32.7 Dark Up 31.2 213.8 Up 07:41:28 - 08:11:28 9875
Bishop 07:56:28 -33.4 Dark Up 32.3 212.9 Up 07:41:28 - 08:11:28 9844
Lone Pine 07:56:28 -34.2 Dark Up 32.8 213.5 Up 07:41:28 - 08:11:28 9781
Beatty 07:56:28 -33.9 Dark Up 32.0 214.7 Up 07:41:28 - 08:11:28 9781
Niwot 07:55:39 -29.6 Dark Up 23.8 224.4 Low 07:40:39 - 08:10:39 9780
Indian Springs 07:56:28 -34.2 Dark Up 31.7 215.9 Up 07:41:28 - 08:11:28 9738
CPSLO 07:56:28 -35.4 Dark Up 35.0 211.2 Up 07:41:28 - 08:11:28 9729
Henderson 07:56:04 -34.7 Dark Up 31.9 216.7 Up 07:41:04 - 08:11:04 9673
Searchlight/Boulder City 07:56:03 -35.3 Dark Up 32.3 216.9 Up 07:41:03 - 08:11:03 9628
Patrick 07:55:59 -35.3 Dark Up 31.9 218.0 Up 07:40:59 - 08:10:59 9602
Wildwood 07:56:28 -36.7 Dark Up 35.1 213.8 Up 07:41:28 - 08:11:28 9598
Laughlin/Bullhead City 07:56:02 -35.6 Dark Up 32.4 217.4 Up 07:41:02 - 08:11:02 9597
Kingman/Dolan Springs 07:56:01 -35.5 Dark Up 32.1 217.9 Up 07:41:01 - 08:11:01 9588
Mohave Valley 07:56:01 -35.8 Dark Up 32.6 217.5 Up 07:41:01 - 08:11:01 9575
DCO 07:55:57 -35.6 Dark Up 31.7 218.8 Up 07:40:57 - 08:10:57 9563
Lake Havasu City 07:56:00 -36.2 Dark Up 32.8 217.9 Up 07:41:00 - 08:11:00 9538
Idyllwild 07:56:28 -37.1 Dark Up 34.5 215.9 Up 07:41:28 - 08:11:28 9537
Parker 07:55:59 -36.6 Dark Up 33.1 218.1 Up 07:40:59 - 08:10:59 9510
Blythe 07:56:01 -37.1 Dark Up 33.6 218.0 Up 07:41:01 - 08:11:01 9474
Calipatria 07:56:03 -37.7 Dark Up 34.5 217.3 Up 07:41:03 - 08:11:03 9453
Yuma 07:55:59 -38.0 Dark Up 34.4 218.3 Up 07:40:59 - 08:10:59 9399

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 98HQ151, (2018/07/27 07:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.85  49
Nunki          18:55:15.9 -26:17:49  2.0 13.76  17
PPM 234686     18:32:43.3 -14:51:57  5.1  1.19  22
PPM 234665     18:31:57.8 -14:00:25  8.2  0.50  22
PPM 234616     18:29:54.0 -14:04:16  9.2  0.20  23
98HQ151        18:30:00.0 -13:52:19 16.0        23
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:02:57 UT

Marc W. Buie, Southwest Research Institute

RECON