RECON: TNO occultation with 98HQ151

Event between 98HQ151 and star UC4-381-110886 with event index number of 132477

Geocentric closest approach at 2018/07/27 06:00:25 UTC

J2000 position of star is 18:30:00.4 -13:52:18
Equinox of date position of star is 18:30:59.5 -13:51:32
Stellar brightness R=14.4, use SENSEUP=64
Star is 22 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 856 seconds.
The 1-sigma cross-track error in the shadow position is 5423 km.
The sky-plane scale is 22698.7 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 06:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.9 -26:28:18  0.9 30.86  48
Nunki          18:56:24.9 -26:16:19  2.0 13.76  16
PPM 234686     18:33:47.0 -14:51:03  5.1  1.19  21
PPM 234665     18:33:01.0 -13:59:33  8.2  0.49  21
PPM 234616     18:30:57.3 -14:03:27  9.2  0.20  22
98HQ151        18:31:03.6 -13:51:28 14.4        22
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 1.1 sigma about the mid-time.
The median site spacing is 15.1 km RECON observability=1.0 and success probability=3.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:00:00 -16.5 AT Up 27.2 177.7 Low 05:45:00 - 06:15:00 8910
Tonasket 06:00:01 -16.7 AT Up 27.4 177.7 Low 05:45:01 - 06:15:01 8899
Okanogan 06:00:01 -16.9 AT Up 27.7 177.6 Low 05:45:01 - 06:15:01 8883
Brewster 06:00:03 -17.1 AT Up 28.0 177.4 Low 05:45:03 - 06:15:03 8871
Manson/Chelan 06:00:03 -17.1 AT Up 28.2 176.9 Low 05:45:03 - 06:15:03 8863
Entiat 06:00:04 -17.3 AT Up 28.4 176.9 Low 05:45:04 - 06:15:04 8852
Wenatchee 06:00:04 -17.5 AT Up 28.7 176.7 Low 05:45:04 - 06:15:04 8839
Ellensburg 06:00:05 -17.7 AT Up 29.1 176.5 Low 05:45:05 - 06:15:05 8820
Yakima 06:00:06 -18.1 Dark Up 29.5 176.5 Low 05:45:06 - 06:15:06 8798
Toppenish/White Swan 06:00:05 -18.3 Dark Up 29.7 176.6 Low 05:45:05 - 06:15:05 8785
Pasco 06:00:00 -18.9 Dark Up 29.9 178.0 Low 05:45:00 - 06:15:00 8767
Goldendale 06:00:07 -18.6 Dark Up 30.2 176.2 Up 05:45:07 - 06:15:07 8758
PNWRO 05:59:59 -19.2 Dark Up 30.1 178.3 Up 05:44:59 - 06:14:59 8752
George/Umatilla 06:00:02 -19.1 Dark Up 30.2 177.8 Up 05:45:02 - 06:15:02 8750
The Dalles 06:00:09 -18.7 Dark Up 30.4 175.7 Up 05:45:09 - 06:15:09 8748
Maupin 06:00:08 -19.1 Dark Up 30.9 175.8 Up 05:45:08 - 06:15:08 8724
Madras/Culver 06:00:09 -19.5 Dark Up 31.4 175.8 Up 05:45:09 - 06:15:09 8694
Sisters 06:00:10 -19.6 Dark Up 31.7 175.3 Up 05:45:10 - 06:15:10 8679
Redmond 06:00:09 -19.8 Dark Up 31.8 175.7 Up 05:45:09 - 06:15:09 8674
Bend 06:00:10 -19.9 Dark Up 32.0 175.5 Up 05:45:10 - 06:15:10 8663
Oregon Observatory 06:00:10 -20.0 Dark Up 32.1 175.4 Up 05:45:10 - 06:15:10 8654
La Pine/Gilchrist 06:00:10 -20.2 Dark Up 32.3 175.3 Up 05:45:10 - 06:15:10 8643
North Lake 06:00:09 -20.8 Dark Up 32.8 176.0 Up 05:45:09 - 06:15:09 8612
Chiloquin 06:00:13 -21.0 Dark Up 33.4 174.8 Up 05:45:13 - 06:15:13 8579
Paisley 06:00:08 -21.4 Dark Up 33.4 176.4 Up 05:45:08 - 06:15:08 8576
Klamath Falls 06:00:13 -21.3 Dark Up 33.8 174.9 Up 05:45:13 - 06:15:13 8558
Lakeview 06:00:08 -21.9 Dark Up 33.9 176.6 Up 05:45:08 - 06:15:08 8543
Tulelake 06:00:12 -21.6 Dark Up 34.0 175.2 Up 05:45:12 - 06:15:12 8539
Cedarville 06:00:07 -22.5 Dark Up 34.5 176.7 Up 05:45:07 - 06:15:07 8501
Fall River/Burney 06:00:12 -22.4 Dark Up 35.0 175.3 Up 05:45:12 - 06:15:12 8481
Susanville 06:00:10 -23.3 Dark Up 35.6 176.1 Up 05:45:10 - 06:15:10 8435
Greenville 06:00:10 -23.4 Dark Up 35.9 175.8 Up 05:45:10 - 06:15:10 8420
Gimple 06:00:10 -23.4 Dark Up 35.9 175.9 Up 05:45:10 - 06:15:10 8419
Quincy 06:00:10 -23.5 Dark Up 36.1 175.8 Up 05:45:10 - 06:15:10 8407
Portola 06:00:10 -23.8 Dark Up 36.2 176.3 Up 05:45:10 - 06:15:10 8395
Reno 06:00:07 -24.3 Dark Up 36.5 177.1 Up 05:45:07 - 06:15:07 8371
Carson City 06:00:07 -24.6 Dark Up 36.9 177.1 Up 05:45:07 - 06:15:07 8347
Gardnerville 06:00:07 -24.9 Dark Up 37.1 177.1 Up 05:45:07 - 06:15:07 8331
Yerington 06:00:04 -25.1 Dark Up 37.1 177.8 Up 05:45:04 - 06:15:04 8328
Hawthorne 06:00:03 -25.7 Dark Up 37.6 178.5 Up 05:45:03 - 06:15:03 8292
Lee Vining 06:00:05 -26.0 Dark Up 38.1 177.9 Up 05:45:05 - 06:15:05 8259
Tonopah 05:59:56 -26.6 Dark Up 38.1 180.2 Up 05:44:56 - 06:14:56 8246
Niwot 05:59:08 -28.6 Dark Up 34.9 194.2 Up 05:44:08 - 06:14:08 8235
Bishop 06:00:02 -26.8 Dark Up 38.8 178.7 Up 05:45:02 - 06:15:02 8211
Beatty 05:59:56 -27.8 Dark Up 39.2 180.7 Up 05:44:56 - 06:14:56 8161
Lone Pine 06:00:01 -27.5 Dark Up 39.5 179.1 Up 05:45:01 - 06:15:01 8154
Indian Springs 05:59:50 -28.5 Dark Up 39.5 182.1 Up 05:44:50 - 06:14:50 8126
CPSLO 06:00:12 -27.5 Dark Up 40.7 175.8 Up 05:45:12 - 06:15:12 8088
Henderson 05:59:48 -29.3 Dark Up 40.0 183.0 Up 05:44:48 - 06:14:48 8080
Searchlight/Boulder City 05:59:48 -29.8 Dark Up 40.6 183.1 Up 05:44:48 - 06:14:48 8038
Patrick 05:59:43 -30.2 Dark Up 40.6 184.4 Up 05:44:43 - 06:14:43 8022
Laughlin/Bullhead City 05:59:46 -30.2 Dark Up 40.9 183.5 Up 05:44:46 - 06:14:46 8012
Kingman/Dolan Springs 05:59:44 -30.4 Dark Up 40.8 184.2 Up 05:44:44 - 06:14:44 8008
Mohave Valley 05:59:46 -30.4 Dark Up 41.2 183.5 Up 05:44:46 - 06:14:46 7992
DCO 05:59:40 -30.8 Dark Up 40.9 185.3 Up 05:44:40 - 06:14:40 7991
Wildwood 06:00:05 -29.4 Dark Up 42.0 178.4 Up 05:45:05 - 06:15:05 7979
Lake Havasu City 05:59:45 -30.9 Dark Up 41.6 183.9 Up 05:44:45 - 06:14:45 7960
Parker 05:59:45 -31.2 Dark Up 41.9 183.9 Up 05:44:45 - 06:14:45 7933
Idyllwild 05:59:56 -30.6 Dark Up 42.4 180.8 Up 05:44:56 - 06:14:56 7932
Blythe 05:59:47 -31.5 Dark Up 42.4 183.6 Up 05:44:47 - 06:14:47 7898
Calipatria 05:59:51 -31.6 Dark Up 43.0 182.4 Up 05:44:51 - 06:14:51 7872
Yuma 05:59:47 -32.3 Dark Up 43.4 183.6 Up 05:44:47 - 06:14:47 7828

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 06:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.86  48
Nunki          18:55:15.9 -26:17:49  2.0 13.76  16
PPM 234686     18:32:43.3 -14:51:57  5.1  1.19  21
PPM 234665     18:31:57.8 -14:00:25  8.2  0.49  21
PPM 234616     18:29:54.0 -14:04:16  9.2  0.20  22
98HQ151        18:30:00.4 -13:52:18 14.4        22
Positions are for J2000

Event circumstances last updated at 2017/05/18 18:07:39 UT

Marc W. Buie, Southwest Research Institute

RECON