RECON: TNO occultation with 98HQ151

Event between 98HQ151 and star UC4-379-121900 with event index number of 110519

Geocentric closest approach at 2018/03/09 12:45:52 UTC

J2000 position of star is 18:37:00.0 -14:14:17
Equinox of date position of star is 18:38:00.0 -14:13:19
Stellar brightness R=15.3, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 32.1 AU from the Sun and 32.4 AU from the Earth.
The TNO is moving 17.2 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 655 seconds.
The 1-sigma cross-track error in the shadow position is 3700 km.
The sky-plane scale is 23515.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=106.2 km assuming a 5% albedo -- 6.2 sec chord
Diameter=43.3 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98HQ151, (2018/03/09 12:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.5 -26:28:15  0.9 32.18  13
Nunki          18:56:23.5 -26:16:21  2.0 12.79  24
PPM 234707     18:34:41.4 -14:50:19  6.1  1.02  19
PPM 234820     18:39:06.4 -13:59:16  6.9  0.35  20
98HQ151        18:38:02.0 -14:13:17 15.3        20
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 1.4 sigma about the mid-time.
The median site spacing is 14.5 km RECON observability=0.7 and success probability=1.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 12:45:19 -16.8 AT Up 17.5 139.0 Really Low 12:30:19 - 13:00:19 7922
Tonasket 12:45:18 -16.9 AT Up 17.7 139.0 Really Low 12:30:18 - 13:00:18 7914
Okanogan 12:45:17 -17.1 AT Up 17.9 138.7 Really Low 12:30:17 - 13:00:17 7905
Brewster 12:45:15 -17.3 AT Up 18.0 138.5 Really Low 12:30:15 - 13:00:15 7898
Manson/Chelan 12:45:12 -17.6 AT Up 18.0 138.1 Really Low 12:30:12 - 13:00:12 7894
Entiat 12:45:11 -17.7 AT Up 18.1 138.0 Really Low 12:30:11 - 13:00:11 7887
Wenatchee 12:45:10 -17.8 AT Up 18.2 137.8 Really Low 12:30:10 - 13:00:10 7879
Ellensburg 12:45:07 -18.0 Dark Up 18.4 137.5 Really Low 12:30:07 - 13:00:07 7867
Yakima 12:45:05 -18.1 Dark Up 18.7 137.4 Really Low 12:30:05 - 13:00:05 7853
Toppenish/White Swan 12:45:05 -18.1 Dark Up 19.0 137.5 Really Low 12:30:05 - 13:00:05 7843
Goldendale 12:45:01 -18.5 Dark Up 19.2 137.0 Really Low 12:30:01 - 13:00:01 7827
Pasco 12:45:10 -17.2 AT Up 19.7 138.7 Really Low 12:30:10 - 13:00:10 7826
The Dalles 12:44:59 -18.8 Dark Up 19.2 136.6 Really Low 12:29:59 - 12:59:59 7821
George/Umatilla 12:45:06 -17.5 AT Up 19.8 138.4 Really Low 12:30:06 - 13:00:06 7816
PNWRO 12:45:08 -17.1 AT Up 19.9 138.8 Really Low 12:30:08 - 13:00:08 7815
Maupin 12:44:58 -18.8 Dark Up 19.5 136.6 Really Low 12:29:58 - 12:59:58 7805
Madras/Culver 12:44:55 -19.0 Dark Up 19.9 136.4 Really Low 12:29:55 - 12:59:55 7784
Sisters 12:44:52 -19.4 Dark Up 19.9 135.9 Really Low 12:29:52 - 12:59:52 7775
Redmond 12:44:54 -19.1 Dark Up 20.1 136.3 Low 12:29:54 - 12:59:54 7771
Bend 12:44:52 -19.3 Dark Up 20.2 136.1 Low 12:29:52 - 12:59:52 7763
Oregon Observatory 12:44:52 -19.4 Dark Up 20.2 135.9 Low 12:29:52 - 12:59:52 7758
La Pine/Gilchrist 12:44:50 -19.5 Dark Up 20.4 135.8 Low 12:29:50 - 12:59:50 7750
North Lake 12:44:51 -19.2 Dark Up 21.0 136.2 Low 12:29:51 - 12:59:51 7726
Chiloquin 12:44:45 -20.0 Dark Up 21.0 135.2 Low 12:29:45 - 12:59:45 7706
Paisley 12:44:50 -19.0 Dark Up 21.6 136.4 Low 12:29:50 - 12:59:50 7699
Klamath Falls 12:44:43 -20.0 Dark Up 21.2 135.2 Low 12:29:43 - 12:59:43 7691
Tulelake 12:44:43 -19.9 Dark Up 21.6 135.4 Low 12:29:43 - 12:59:43 7676
Lakeview 12:44:48 -19.0 Dark Up 22.0 136.4 Low 12:29:48 - 12:59:48 7676
Cedarville 12:44:46 -19.0 Dark Up 22.6 136.4 Low 12:29:46 - 12:59:46 7645
Fall River/Burney 12:44:40 -20.0 Dark Up 22.3 135.2 Low 12:29:40 - 12:59:40 7634
Susanville 12:44:40 -19.6 Dark Up 23.1 135.6 Low 12:29:40 - 12:59:40 7598
Greenville 12:44:37 -19.9 Dark Up 23.1 135.3 Low 12:29:37 - 12:59:37 7588
Gimple 12:44:38 -19.8 Dark Up 23.2 135.3 Low 12:29:38 - 12:59:38 7587
Quincy 12:44:36 -19.9 Dark Up 23.3 135.2 Low 12:29:36 - 12:59:36 7578
Portola 12:44:38 -19.6 Dark Up 23.6 135.6 Low 12:29:38 - 12:59:38 7568
Reno 12:44:40 -19.1 Dark Up 24.2 136.1 Low 12:29:40 - 12:59:40 7548
Carson City 12:44:38 -19.2 Dark Up 24.5 136.0 Low 12:29:38 - 12:59:38 7530
Gardnerville 12:44:37 -19.2 Dark Up 24.7 136.0 Low 12:29:37 - 12:59:37 7518
Yerington 12:44:40 -18.7 Dark Up 24.9 136.5 Low 12:29:40 - 12:59:40 7514
Hawthorne 12:44:40 -18.4 Dark Up 25.6 136.8 Low 12:29:40 - 12:59:40 7484
Lee Vining 12:44:36 -18.9 Dark Up 25.7 136.2 Low 12:29:36 - 12:59:36 7462
Tonopah 12:44:44 -17.4 AT Up 26.7 138.0 Low 12:29:44 - 12:59:44 7444
Bishop 12:44:37 -18.4 Dark Up 26.5 136.6 Low 12:29:37 - 12:59:37 7422
Lone Pine 12:44:35 -18.3 Dark Up 27.3 136.7 Low 12:29:35 - 12:59:35 7377
Beatty 12:44:43 -17.2 AT Up 27.8 138.0 Low 12:29:43 - 12:59:43 7377
Niwot 12:45:44 -7.7 CT Up 30.6 150.6 Up 12:30:44 - 13:00:44 7356
Indian Springs 12:44:45 -16.3 AT Up 28.6 138.9 Low 12:29:45 - 12:59:45 7345
CPSLO 12:44:19 -20.6 Dark Up 26.7 133.9 Low 12:29:19 - 12:59:19 7335
Henderson 12:44:47 -15.8 AT Up 29.4 139.3 Low 12:29:47 - 12:59:47 7305
Searchlight/Boulder City 12:44:44 -15.9 AT Up 29.8 139.2 Low 12:29:44 - 12:59:44 7273
Patrick 12:44:50 -15.0 AT Up 30.4 140.2 Up 12:29:50 - 12:59:50 7254
Laughlin/Bullhead City 12:44:45 -15.6 AT Up 30.2 139.4 Up 12:29:45 - 12:59:45 7250
Kingman/Dolan Springs 12:44:47 -15.2 AT Up 30.5 139.9 Up 12:29:47 - 12:59:47 7245
Wildwood 12:44:22 -19.1 Dark Up 28.7 135.2 Low 12:29:22 - 12:59:22 7243
Mohave Valley 12:44:44 -15.6 AT Up 30.4 139.3 Up 12:29:44 - 12:59:44 7235
DCO 12:44:51 -14.4 AT Up 31.0 140.7 Up 12:29:51 - 12:59:51 7226
Lake Havasu City 12:44:45 -15.5 AT Up 30.9 139.4 Up 12:29:45 - 12:59:45 7208
Idyllwild 12:44:30 -17.6 AT Up 30.1 136.8 Up 12:29:30 - 12:59:30 7199
Parker 12:44:42 -15.5 AT Up 31.2 139.2 Up 12:29:42 - 12:59:42 7187
Blythe 12:44:40 -15.8 AT Up 31.4 138.7 Up 12:29:40 - 12:59:40 7161
Calipatria 12:44:33 -16.6 AT Up 31.2 137.6 Up 12:29:33 - 12:59:33 7145
Yuma 12:44:35 -15.9 AT Up 32.1 138.3 Up 12:29:35 - 12:59:35 7106

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, (2018/03/09 12:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.18  13
Nunki          18:55:15.9 -26:17:49  2.0 12.79  24
PPM 234707     18:33:39.1 -14:51:13  6.1  1.02  19
PPM 234820     18:38:04.5 -14:00:18  6.9  0.35  20
98HQ151        18:37:00.0 -14:14:17 15.3        20
Positions are for J2000

Event circumstances last updated at 2017/08/04 17:59:54 UT

Marc W. Buie, Southwest Research Institute

RECON