RECON: TNO occultation with 307261

Event between (307261) 02MS4 and star GA0820:13317815 with event index number of 340337

Geocentric closest approach at 2020/08/05 08:42:56 UTC

J2000 position of star is 18:47:42.3 -06:15:38
Equinox of date position of star is 18:48:48.3 -06:14:12
Stellar brightness G=14.4, use SENSEUP=128
Star is 55 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=26.7

[RECON map]
TNO is 46.5 AU from the Sun and 45.7 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 196 seconds.
The 1-sigma cross-track error in the shadow position is 2761 km.
The sky-plane scale is 33120.7 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=1148.2 km assuming a 5% albedo -- 2.8 sec chord
Diameter=468.7 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307261, (2020/08/05 08:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.4 -26:28:33  0.9 38.61  83
60Bet Oph      17:44:29.4 +04:33:37  2.8 19.35  73
PPM 202138     18:48:34.9 -05:40:53  4.6  0.56  55
PPM 202134     18:48:14.4 -05:52:30  7.5  0.39  55
PPM 202141     18:48:49.8 -06:12:33  9.4  0.03  55
307261         18:48:48.6 -06:14:12 14.4        54
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 4.6 sigma about the mid-time.
The median site spacing is 21.9 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)
Clarence Fulton 08:39:48 -22.5 Dark Up 22.4 227.2 Low 08:24:48 - 08:54:48 13058
Kelowna 08:39:47 -22.9 Dark Up 22.7 227.2 Low 08:24:47 - 08:54:47 13031
Peachland 08:39:49 -23.0 Dark Up 22.9 227.0 Low 08:24:49 - 08:54:49 13028
Summerland 08:39:47 -23.1 Dark Up 23.0 227.1 Low 08:24:47 - 08:54:47 13015
Penticton 08:39:48 -23.2 Dark Up 23.0 227.2 Low 08:24:48 - 08:54:48 13007
Victoria 08:39:55 -24.5 Dark Up 25.5 223.9 Low 08:24:55 - 08:54:55 13004
Oliver 08:39:46 -23.5 Dark Up 23.2 227.3 Low 08:24:46 - 08:54:46 12980
Anarchist Mountain Observatory 08:39:46 -23.7 Dark Up 23.2 227.6 Low 08:24:46 - 08:54:46 12963
Tonasket 08:39:46 -24.0 Dark Up 23.5 227.6 Low 08:24:46 - 08:54:46 12940
Okanogan 08:39:45 -24.4 Dark Up 23.8 227.5 Low 08:24:45 - 08:54:45 12916
Brewster 08:39:43 -24.6 Dark Up 24.1 227.4 Low 08:24:43 - 08:54:43 12899
Manson/Chelan 08:39:43 -24.9 Dark Up 24.4 227.2 Low 08:24:43 - 08:54:43 12889
Entiat 08:39:45 -25.1 Dark Up 24.6 227.2 Low 08:24:45 - 08:54:45 12873
Wenatchee 08:39:46 -25.4 Dark Up 24.8 227.2 Low 08:24:46 - 08:54:46 12855
Ellensburg 08:39:45 -25.8 Dark Up 25.2 227.1 Low 08:24:45 - 08:54:45 12826
Yakima 08:39:45 -26.2 Dark Up 25.5 227.2 Low 08:24:45 - 08:54:45 12794
Toppenish/White Swan 08:39:43 -26.4 Dark Up 25.5 227.5 Low 08:24:43 - 08:54:43 12772
Pasco 08:39:41 -26.4 Dark Up 25.0 228.7 Low 08:24:41 - 08:54:41 12737
Goldendale 08:39:44 -27.0 Dark Up 26.1 227.2 Low 08:24:44 - 08:54:44 12736
The Dalles 08:39:44 -27.3 Dark Up 26.5 227.0 Low 08:24:44 - 08:54:44 12725
PNWRO 08:39:40 -26.6 Dark Up 25.0 229.0 Low 08:24:40 - 08:54:40 12712
Maupin 08:39:43 -27.7 Dark Up 26.7 227.2 Low 08:24:43 - 08:54:43 12689
Sisters 08:39:45 -28.6 Dark Up 27.5 227.1 Low 08:24:45 - 08:54:45 12627
Redmond 08:39:42 -28.6 Dark Up 27.4 227.5 Low 08:24:42 - 08:54:42 12616
Bend 08:39:44 -28.8 Dark Up 27.6 227.4 Low 08:24:44 - 08:54:44 12601
Oregon Observatory 08:39:44 -29.0 Dark Up 27.8 227.4 Low 08:24:44 - 08:54:44 12590
La Pine/Gilchrist 08:39:44 -29.2 Dark Up 27.9 227.4 Low 08:24:44 - 08:54:44 12574
North Lake 08:39:40 -29.6 Dark Up 27.9 228.1 Low 08:24:40 - 08:54:40 12524
Paisley 08:39:39 -30.1 Dark Up 28.1 228.7 Low 08:24:39 - 08:54:39 12469
Klamath Falls 08:39:43 -30.7 Dark Up 29.1 227.7 Low 08:24:43 - 08:54:43 12456
Lakeview 08:39:38 -30.5 Dark Up 28.3 229.1 Low 08:24:38 - 08:54:38 12421
Cedarville 08:39:37 -31.2 Dark Up 28.6 229.5 Low 08:24:37 - 08:54:37 12361
Fall River/Burney 08:39:41 -31.8 Dark Up 29.6 228.6 Low 08:24:41 - 08:54:41 12346
Susanville 08:39:36 -32.3 Dark Up 29.6 229.5 Low 08:24:36 - 08:54:36 12274
Greenville 08:39:37 -32.6 Dark Up 30.0 229.4 Low 08:24:37 - 08:54:37 12256
Gimple 08:39:36 -32.6 Dark Up 29.9 229.4 Low 08:24:36 - 08:54:36 12254
Quincy 08:39:36 -32.8 Dark Up 30.1 229.4 Up 08:24:36 - 08:54:36 12238
Portola 08:39:35 -32.9 Dark Up 29.9 229.9 Low 08:24:35 - 08:54:35 12216
Reno 08:39:34 -33.1 Dark Up 29.7 230.7 Low 08:24:34 - 08:54:34 12178
Carson City 08:39:33 -33.4 Dark Up 29.9 230.8 Low 08:24:33 - 08:54:33 12146
Gardnerville 08:39:32 -33.7 Dark Up 30.1 231.0 Up 08:24:32 - 08:54:32 12123
Yerington 08:39:31 -33.5 Dark Up 29.7 231.5 Low 08:24:31 - 08:54:31 12113
Hawthorne 08:39:30 -33.9 Dark Up 29.6 232.2 Low 08:24:30 - 08:54:30 12059
Lee Vining 08:39:30 -34.5 Dark Up 30.3 232.0 Up 08:24:30 - 08:54:30 12020
Tonopah 08:39:24 -34.1 Dark Up 29.0 233.6 Low 08:24:24 - 08:54:24 11985
Bishop 08:39:27 -35.0 Dark Up 30.2 232.9 Up 08:24:27 - 08:54:27 11948
Niwot 08:39:00 -29.2 Dark Up 20.1 242.6 Low 08:24:00 - 08:54:00 11917
SwRI 08:38:57 -29.3 Dark Up 20.2 242.6 Low 08:23:57 - 08:53:57 11909
Beatty 08:39:22 -35.2 Dark Up 29.4 234.5 Low 08:24:22 - 08:54:22 11867
Indian Springs 08:39:20 -35.3 Dark Up 28.9 235.6 Low 08:24:20 - 08:54:20 11812
CPSLO 08:39:31 -37.4 Dark Up 32.9 231.9 Up 08:24:31 - 08:54:31 11811
Henderson 08:39:16 -35.7 Dark Up 28.8 236.4 Low 08:24:16 - 08:54:16 11746
Searchlight/Boulder City 08:39:16 -36.2 Dark Up 29.0 236.7 Low 08:24:16 - 08:54:16 11691
Patrick 08:39:13 -36.0 Dark Up 28.4 237.6 Low 08:24:13 - 08:54:13 11661
Laughlin/Bullhead City 08:39:15 -36.4 Dark Up 29.0 237.1 Low 08:24:15 - 08:54:15 11654
Wildwood 08:39:25 -38.3 Dark Up 32.3 234.3 Up 08:24:25 - 08:54:25 11648
Kingman/Dolan Springs 08:39:13 -36.3 Dark Up 28.6 237.6 Low 08:24:13 - 08:54:13 11644
Mohave Valley 08:39:13 -36.7 Dark Up 29.1 237.3 Low 08:24:13 - 08:54:13 11628
DCO 08:39:10 -36.1 Dark Up 28.0 238.3 Low 08:24:10 - 08:54:10 11616
Lake Havasu City 08:39:13 -37.0 Dark Up 29.2 237.7 Low 08:24:13 - 08:54:13 11584
Idyllwild 08:39:19 -38.3 Dark Up 31.2 236.1 Up 08:24:19 - 08:54:19 11569
Parker 08:39:12 -37.3 Dark Up 29.3 237.8 Low 08:24:12 - 08:54:12 11550
Blythe 08:39:12 -37.9 Dark Up 29.8 237.9 Low 08:24:12 - 08:54:12 11506
Calipatria 08:39:15 -38.6 Dark Up 30.7 237.4 Up 08:24:15 - 08:54:15 11481
George/Scottsdale 08:39:06 -37.1 Dark Up 27.8 240.0 Low 08:24:06 - 08:54:06 11452
Yuma 08:39:12 -38.8 Dark Up 30.3 238.3 Up 08:24:12 - 08:54:12 11418

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, (2020/08/05 08:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.61  83
60Bet Oph      17:43:28.3 +04:34:06  2.8 19.35  73
PPM 202138     18:47:28.9 -05:42:19  4.6  0.56  55
PPM 202134     18:47:08.3 -05:53:55  7.5  0.39  55
PPM 202141     18:47:43.6 -06:14:00  9.4  0.03  55
307261         18:47:42.3 -06:15:38 14.4        55
Positions are for J2000

Event circumstances last updated at 2020/07/03 21:15:41 UT

Marc W. Buie, Southwest Research Institute

RECON