RECON: TNO occultation with 307261

Event between (307261) 02MS4 and star GA0820:13971093 with event index number of 339708

Geocentric closest approach at 2019/03/22 10:27:01 UTC

J2000 position of star is 18:49:26.3 -06:46:38
Equinox of date position of star is 18:50:28.1 -06:45:15
Stellar brightness G=13.5, use SENSEUP=32
Star is 81 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=20.4

[RECON map]
TNO is 46.6 AU from the Sun and 46.8 AU from the Earth.
The TNO is moving 13.6 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 318 seconds.
The 1-sigma cross-track error in the shadow position is 3255 km.
The sky-plane scale is 33937.1 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 84.5 sec chord
Diameter=468.7 km assuming a 30% albedo -- 34.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307261, (2019/03/22 10:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.3 -26:28:23  0.9 38.66  50
Nunki          18:56:27.3 -26:16:16  2.0 19.57  82
PPM 202138     18:48:30.5 -05:40:59  4.6  1.18  81
PPM 202153     18:49:38.0 -07:06:35  8.4  0.41  81
PPM 202177     18:50:45.4 -06:47:54  9.7  0.08  81
307261         18:50:28.4 -06:45:15 13.5        82
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 2.8 sigma about the mid-time.
The median site spacing is 20.9 km RECON observability=0.1 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)
Sisters 10:27:19 -36.1 Dark Up 11.0 110.9 Really Low 10:12:19 - 10:42:19 10684
The Dalles 10:27:29 -35.0 Dark Up 10.8 111.5 Really Low 10:12:29 - 10:42:29 10681
Oregon Observatory 10:27:14 -36.4 Dark Up 11.2 110.9 Really Low 10:12:14 - 10:42:14 10680
La Pine/Gilchrist 10:27:15 -36.5 Dark Up 11.2 110.8 Really Low 10:12:15 - 10:42:15 10680
Chiloquin 10:27:07 -37.5 Dark Up 11.3 110.3 Really Low 10:12:07 - 10:42:07 10680
Bend 10:27:18 -36.2 Dark Up 11.2 111.0 Really Low 10:12:18 - 10:42:18 10679
Maupin 10:27:24 -35.2 Dark Up 11.0 111.4 Really Low 10:12:24 - 10:42:24 10679
Madras/Culver 10:27:22 -35.6 Dark Up 11.1 111.3 Really Low 10:12:22 - 10:42:22 10678
Redmond 10:27:14 -35.9 Dark Up 11.2 111.2 Really Low 10:12:14 - 10:42:14 10678
Klamath Falls 10:27:01 -37.8 Dark Up 11.5 110.3 Really Low 10:12:01 - 10:42:01 10676
Goldendale 10:27:28 -34.6 Dark Up 10.9 111.8 Really Low 10:12:28 - 10:42:28 10676
Yakima 10:27:40 -33.9 Dark Up 10.8 112.1 Really Low 10:12:40 - 10:42:40 10671
Ellensburg 10:27:42 -33.6 Dark Up 10.7 112.2 Really Low 10:12:42 - 10:42:42 10670
Tulelake 10:27:01 -37.8 Dark Up 11.8 110.5 Really Low 10:12:01 - 10:42:01 10669
North Lake 10:27:14 -36.6 Dark Up 11.8 111.2 Really Low 10:12:14 - 10:42:14 10669
Toppenish/White Swan 10:27:36 -34.0 Dark Up 11.0 112.2 Really Low 10:12:36 - 10:42:36 10669
Wenatchee 10:27:49 -33.2 Dark Up 10.7 112.5 Really Low 10:12:49 - 10:42:49 10666
Entiat 10:27:49 -33.0 Dark Up 10.7 112.6 Really Low 10:12:49 - 10:42:49 10664
Manson/Chelan 10:27:49 -32.8 Dark Up 10.6 112.7 Really Low 10:12:49 - 10:42:49 10663
Fall River/Burney 10:26:56 -38.4 Dark Up 12.2 110.3 Really Low 10:11:56 - 10:41:56 10661
Paisley 10:27:10 -36.8 Dark Up 12.2 111.3 Really Low 10:12:10 - 10:42:10 10660
Brewster 10:27:52 -32.4 Dark Up 10.8 113.1 Really Low 10:12:52 - 10:42:52 10656
Lakeview 10:27:07 -37.0 Dark Up 12.5 111.4 Really Low 10:12:07 - 10:42:07 10653
George/Umatilla 10:27:38 -33.8 Dark Up 11.9 113.0 Really Low 10:12:38 - 10:42:38 10652
Okanogan 10:27:56 -32.1 Dark Up 10.8 113.3 Really Low 10:12:56 - 10:42:56 10652
Pasco 10:27:42 -33.5 Dark Up 11.9 113.2 Really Low 10:12:42 - 10:42:42 10648
Tonasket 10:27:59 -31.8 Dark Up 10.8 113.5 Really Low 10:12:59 - 10:42:59 10648
Oliver 10:28:01 -31.5 Dark Up 10.5 113.5 Really Low 10:13:01 - 10:43:01 10648
Oroville 10:27:59 -31.7 Dark Up 10.7 113.5 Really Low 10:12:59 - 10:42:59 10647
Okanagan Falls 10:27:59 -31.4 Dark Up 10.4 113.5 Really Low 10:12:59 - 10:42:59 10647
Summerland 10:28:03 -31.1 Dark Up 10.1 113.4 Really Low 10:13:03 - 10:43:03 10646
Penticton 10:28:06 -31.3 Dark Up 10.4 113.5 Really Low 10:13:06 - 10:43:06 10646
Anarchist Mountain Observatory 10:28:03 -31.6 Dark Up 10.7 113.6 Really Low 10:13:03 - 10:43:03 10646
Cedarville 10:27:01 -37.4 Dark Up 12.9 111.3 Really Low 10:12:01 - 10:42:01 10644
PNWRO 10:27:35 -33.5 Dark Up 12.1 113.3 Really Low 10:12:35 - 10:42:35 10644
Greenville 10:26:49 -38.8 Dark Up 12.8 110.4 Really Low 10:11:49 - 10:41:49 10644
Gimple 10:26:47 -38.8 Dark Up 12.8 110.5 Really Low 10:11:47 - 10:41:47 10643
Susanville 10:26:51 -38.5 Dark Up 12.9 110.7 Really Low 10:11:51 - 10:41:51 10642
Quincy 10:26:47 -39.0 Dark Up 12.8 110.4 Really Low 10:11:47 - 10:41:47 10642
Kelowna 10:28:07 -30.9 Dark Up 10.3 113.7 Really Low 10:13:07 - 10:43:07 10641
Portola 10:26:49 -38.8 Dark Up 13.2 110.7 Really Low 10:11:49 - 10:41:49 10632
Reno 10:26:49 -38.6 Dark Up 13.8 111.1 Really Low 10:11:49 - 10:41:49 10618
Carson City 10:26:42 -38.8 Dark Up 13.9 111.0 Really Low 10:11:42 - 10:41:42 10612
Gardnerville 10:26:40 -39.0 Dark Up 14.0 111.0 Really Low 10:11:40 - 10:41:40 10608
Yerington 10:26:45 -38.6 Dark Up 14.5 111.4 Really Low 10:11:45 - 10:41:45 10598
Lee Vining 10:26:37 -39.3 Dark Up 14.8 111.2 Really Low 10:11:37 - 10:41:37 10582
Hawthorne 10:26:42 -38.6 Dark Up 15.0 111.7 Really Low 10:11:42 - 10:41:42 10581
CPSLO 10:26:12 -42.0 Dark Up 14.5 109.4 Really Low 10:11:12 - 10:41:12 10563
Bishop 10:26:35 -39.2 Dark Up 15.6 111.5 Really Low 10:11:35 - 10:41:35 10558
Tonopah 10:26:40 -38.1 Dark Up 16.2 112.6 Really Low 10:11:40 - 10:41:40 10545
Lone Pine 10:26:28 -39.5 Dark Up 16.1 111.5 Really Low 10:11:28 - 10:41:28 10538
Beatty 10:26:35 -38.5 Dark Up 17.0 112.5 Really Low 10:11:35 - 10:41:35 10516
Wildwood 10:26:09 -41.5 Dark Up 16.5 110.4 Really Low 10:11:09 - 10:41:09 10497
Indian Springs 10:26:35 -38.0 Dark Up 17.9 113.2 Really Low 10:11:35 - 10:41:35 10486
Henderson 10:26:35 -37.9 Dark Up 18.6 113.5 Really Low 10:11:35 - 10:41:35 10459
Idyllwild 10:26:14 -40.4 Dark Up 18.1 111.6 Really Low 10:11:14 - 10:41:14 10448
Searchlight/Boulder City 10:26:24 -38.2 Dark Up 18.9 113.4 Really Low 10:11:24 - 10:41:24 10446
Laughlin/Bullhead City 10:26:31 -38.1 Dark Up 19.3 113.5 Really Low 10:11:31 - 10:41:31 10431
Mohave Valley 10:26:28 -38.3 Dark Up 19.4 113.4 Really Low 10:11:28 - 10:41:28 10424
Patrick 10:26:34 -37.5 Dark Up 19.7 114.1 Really Low 10:11:34 - 10:41:34 10418
Kingman/Dolan Springs 10:26:31 -37.8 Dark Up 19.6 113.9 Really Low 10:11:31 - 10:41:31 10418
Lake Havasu City 10:26:24 -38.3 Dark Up 19.7 113.5 Really Low 10:11:24 - 10:41:24 10409
Calipatria 10:26:10 -40.0 Dark Up 19.3 112.2 Really Low 10:11:10 - 10:41:10 10405
Parker 10:26:19 -38.5 Dark Up 19.8 113.3 Really Low 10:11:19 - 10:41:19 10400
Blythe 10:26:15 -39.0 Dark Up 19.8 113.0 Really Low 10:11:15 - 10:41:15 10395
DCO 10:26:33 -37.2 Dark Up 20.3 114.5 Low 10:11:33 - 10:41:33 10393
Yuma 10:26:08 -39.6 Dark Up 20.1 112.6 Low 10:11:08 - 10:41:08 10372
SwRI 10:27:28 -29.1 Dark Up 23.7 122.4 Low 10:12:28 - 10:42:28 10258
Niwot 10:27:35 -29.0 Dark Up 23.7 122.6 Low 10:12:35 - 10:42:35 10256

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, (2019/03/22 10:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.66  50
Nunki          18:55:15.9 -26:17:49  2.0 19.57  82
PPM 202138     18:47:28.9 -05:42:19  4.6  1.18  81
PPM 202153     18:48:35.7 -07:07:57  8.4  0.41  81
PPM 202177     18:49:43.3 -06:49:18  9.7  0.08  81
307261         18:49:26.3 -06:46:38 13.5        81
Positions are for J2000

Event circumstances last updated at 2019/02/12 06:56:02 UT

Marc W. Buie, Southwest Research Institute

RECON