RECON: TNO occultation with 307261

Event between (307261) 02MS4 and star UC4-418-089644 with event index number of 209267

Geocentric closest approach at 2019/08/19 06:37:38 UTC

J2000 position of star is 18:42:43.6 -06:32:33
Equinox of date position of star is 18:43:41.5 -06:31:26
Stellar brightness R=15.9, use SENSEUP=128
Star is 88 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=20.4

[RECON map]
TNO is 46.6 AU from the Sun and 45.9 AU from the Earth.
The TNO is moving 17.5 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 206 seconds.
The 1-sigma cross-track error in the shadow position is 2854 km.
The sky-plane scale is 33278.9 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 65.7 sec chord
Diameter=468.7 km assuming a 30% albedo -- 26.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307261, (2019/08/19 06:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.9 -26:28:26  0.9 37.44 117
60Bet Oph      17:44:26.6 +04:33:38  2.8 18.50 103
PPM 202054     18:43:39.7 -07:03:12  6.5  0.53  88
PPM 202094     18:45:44.2 -06:30:53  6.8  0.49  87
PPM 202047     18:43:24.6 -06:47:07  9.5  0.28  88
307261         18:43:46.9 -06:31:19 15.9        87
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 4.4 sigma about the mid-time.
The median site spacing is 19.0 km RECON observability=1.0 and success probability=0.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:34:14 -25.3 Dark Up 30.1 210.0 Up 06:19:14 - 06:49:14 11178
Tonasket 06:34:13 -25.5 Dark Up 30.3 210.0 Up 06:19:13 - 06:49:13 11160
Okanogan 06:34:13 -25.8 Dark Up 30.7 210.0 Up 06:19:13 - 06:49:13 11140
Brewster 06:34:16 -26.0 Dark Up 31.0 209.8 Up 06:19:16 - 06:49:16 11126
Manson/Chelan 06:34:16 -26.0 Dark Up 31.3 209.5 Up 06:19:16 - 06:49:16 11121
Entiat 06:34:16 -26.2 Dark Up 31.5 209.5 Up 06:19:16 - 06:49:16 11107
Wenatchee 06:34:17 -26.4 Dark Up 31.7 209.5 Up 06:19:17 - 06:49:17 11091
Ellensburg 06:34:17 -26.7 Dark Up 32.2 209.3 Up 06:19:17 - 06:49:17 11067
Yakima 06:34:16 -27.1 Dark Up 32.5 209.4 Up 06:19:16 - 06:49:16 11037
Toppenish/White Swan 06:34:16 -27.3 Dark Up 32.7 209.7 Up 06:19:16 - 06:49:16 11015
Goldendale 06:34:18 -27.7 Dark Up 33.3 209.4 Up 06:19:18 - 06:49:18 10986
The Dalles 06:34:20 -27.8 Dark Up 33.6 209.1 Up 06:19:20 - 06:49:20 10980
Pasco 06:34:11 -27.8 Dark Up 32.3 211.1 Up 06:19:11 - 06:49:11 10968
George/Umatilla 06:34:10 -28.1 Dark Up 32.7 211.0 Up 06:19:10 - 06:49:10 10949
Maupin 06:34:18 -28.2 Dark Up 33.9 209.3 Up 06:19:18 - 06:49:18 10945
PNWRO 06:34:11 -28.1 Dark Up 32.5 211.4 Up 06:19:11 - 06:49:11 10942
Madras/Culver 06:34:18 -28.7 Dark Up 34.4 209.5 Up 06:19:18 - 06:49:18 10904
Sisters 06:34:20 -28.9 Dark Up 34.9 209.1 Up 06:19:20 - 06:49:20 10892
Redmond 06:34:18 -29.0 Dark Up 34.8 209.5 Up 06:19:18 - 06:49:18 10878
Bend 06:34:19 -29.2 Dark Up 35.0 209.4 Up 06:19:19 - 06:49:19 10866
Oregon Observatory 06:34:21 -29.3 Dark Up 35.2 209.4 Up 06:19:21 - 06:49:21 10857
La Pine/Gilchrist 06:34:20 -29.4 Dark Up 35.4 209.4 Up 06:19:20 - 06:49:20 10842
North Lake 06:34:18 -30.0 Dark Up 35.5 210.2 Up 06:19:18 - 06:49:18 10789
Chiloquin 06:34:20 -30.3 Dark Up 36.5 209.3 Up 06:19:20 - 06:49:20 10766
Klamath Falls 06:34:20 -30.6 Dark Up 36.8 209.6 Up 06:19:20 - 06:49:20 10736
Paisley 06:34:17 -30.6 Dark Up 35.9 210.8 Up 06:19:17 - 06:49:17 10734
Tulelake 06:34:20 -31.0 Dark Up 36.9 210.0 Up 06:19:20 - 06:49:20 10705
Lakeview 06:34:16 -31.1 Dark Up 36.3 211.2 Up 06:19:16 - 06:49:16 10688
Fall River/Burney 06:34:20 -31.8 Dark Up 37.6 210.5 Up 06:19:20 - 06:49:20 10629
Cedarville 06:34:15 -31.8 Dark Up 36.7 211.7 Up 06:19:15 - 06:49:15 10629
Susanville 06:34:16 -32.6 Dark Up 37.9 211.5 Up 06:19:16 - 06:49:16 10554
Greenville 06:34:18 -32.8 Dark Up 38.2 211.3 Up 06:19:18 - 06:49:18 10541
Gimple 06:34:16 -32.8 Dark Up 38.2 211.4 Up 06:19:16 - 06:49:16 10538
Quincy 06:34:18 -32.9 Dark Up 38.4 211.4 Up 06:19:18 - 06:49:18 10524
Portola 06:34:17 -33.2 Dark Up 38.3 212.0 Up 06:19:17 - 06:49:17 10498
Reno 06:34:14 -33.7 Dark Up 38.3 212.9 Up 06:19:14 - 06:49:14 10454
Carson City 06:34:14 -34.0 Dark Up 38.6 213.0 Up 06:19:14 - 06:49:14 10423
Gardnerville 06:34:14 -34.2 Dark Up 38.8 213.2 Up 06:19:14 - 06:49:14 10401
Yerington 06:34:12 -34.4 Dark Up 38.5 213.8 Up 06:19:12 - 06:49:12 10386
Hawthorne 06:34:10 -35.0 Dark Up 38.6 214.7 Up 06:19:10 - 06:49:10 10329
Lee Vining 06:34:11 -35.3 Dark Up 39.3 214.4 Up 06:19:11 - 06:49:11 10297
Tonopah 06:34:04 -35.9 Dark Up 38.4 216.4 Up 06:19:04 - 06:49:04 10241
Bishop 06:34:09 -36.1 Dark Up 39.5 215.5 Up 06:19:09 - 06:49:09 10222
Lone Pine 06:34:06 -36.9 Dark Up 39.9 216.2 Up 06:19:06 - 06:49:06 10144
Beatty 06:34:01 -37.1 Dark Up 39.1 217.5 Up 06:19:01 - 06:49:01 10126
CPSLO 06:34:19 -37.1 Dark Up 42.2 213.9 Up 06:19:19 - 06:49:19 10121
Indian Springs 06:33:57 -37.7 Dark Up 38.8 218.8 Up 06:18:57 - 06:48:57 10060
Niwot 06:33:20 -36.6 Dark Up 30.7 227.7 Up 06:18:20 - 06:48:20 10034
Henderson 06:33:56 -38.4 Dark Up 38.9 219.9 Up 06:18:56 - 06:48:56 9989
Wildwood 06:34:09 -39.0 Dark Up 42.2 216.9 Up 06:19:09 - 06:49:09 9942
Searchlight/Boulder City 06:33:55 -39.0 Dark Up 39.3 220.2 Up 06:18:55 - 06:48:55 9936
Laughlin/Bullhead City 06:33:51 -39.3 Dark Up 39.3 220.7 Up 06:18:51 - 06:48:51 9897
Patrick 06:33:50 -39.3 Dark Up 38.8 221.4 Up 06:18:50 - 06:48:50 9895
Kingman/Dolan Springs 06:33:50 -39.5 Dark Up 39.0 221.3 Up 06:18:50 - 06:48:50 9882
Mohave Valley 06:33:53 -39.6 Dark Up 39.5 220.9 Up 06:18:53 - 06:48:53 9873
DCO 06:33:46 -39.8 Dark Up 38.6 222.3 Up 06:18:46 - 06:48:46 9843
Idyllwild 06:34:03 -40.0 Dark Up 41.5 219.2 Up 06:19:03 - 06:49:03 9843
Lake Havasu City 06:33:51 -40.0 Dark Up 39.7 221.4 Up 06:18:51 - 06:48:51 9828
Parker 06:33:52 -40.4 Dark Up 40.0 221.6 Up 06:18:52 - 06:48:52 9795
Blythe 06:33:53 -40.8 Dark Up 40.5 221.6 Up 06:18:53 - 06:48:53 9758
Calipatria 06:33:57 -40.9 Dark Up 41.4 220.9 Up 06:18:57 - 06:48:57 9746
Yuma 06:33:54 -41.6 Dark Up 41.2 222.1 Up 06:18:54 - 06:48:54 9675

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 307261, (2019/08/19 06:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 37.44 117
60Bet Oph      17:43:28.3 +04:34:05  2.8 18.50 103
PPM 202054     18:42:36.1 -07:04:26  6.5  0.53  88
PPM 202094     18:44:40.9 -06:32:10  6.8  0.49  87
PPM 202047     18:42:21.1 -06:48:20  9.5  0.28  88
307261         18:42:43.6 -06:32:33 15.9        88
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:12:55 UT

Marc W. Buie, Southwest Research Institute

RECON