RECON: TNO occultation with 307251

Event between (307251) 02KW14 and star GA0620:13993368 with event index number of 1165399

Geocentric closest approach at 2021/06/12 08:24:19 UTC

J2000 position of star is 17:09:37.2 -26:12:52
Equinox of date position of star is 17:10:55.5 -26:14:23
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 156 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 42.7 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 406 seconds.
The 1-sigma cross-track error in the shadow position is 3282 km.
The sky-plane scale is 30266.3 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 18.5 sec chord
Diameter=186.6 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307251, (2021/06/12 08:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.5 -26:28:40  0.9  9.01 147
23Tau Sco      16:37:13.3 -28:15:31  2.8  7.76 149
PPM 266416     17:08:13.1 -26:32:25  6.3  0.68 156
PPM 266507     17:11:52.3 -26:16:14  8.3  0.21 156
PPM 266475     17:10:36.0 -26:05:43  9.5  0.16 156
307251         17:10:57.0 -26:14:25 16.4       156
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 2.2 sigma about the mid-time.
The median site spacing is 14.7 km RECON observability=0.6 and success probability=0.0%
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 08:24:05 -16.3 AT Down 13.0 189.4 Really Low 08:09:05 - 08:39:05 15137
Kelowna 08:24:05 -16.7 AT Down 13.4 189.3 Really Low 08:09:05 - 08:39:05 15127
Peachland 08:24:06 -16.9 AT Down 13.5 189.0 Really Low 08:09:06 - 08:39:06 15124
Summerland 08:24:06 -17.0 AT Down 13.7 189.1 Really Low 08:09:06 - 08:39:06 15120
Penticton 08:24:06 -17.1 AT Down 13.7 189.2 Really Low 08:09:06 - 08:39:06 15118
Oliver 08:24:05 -17.4 AT Down 14.1 189.2 Really Low 08:09:05 - 08:39:05 15108
Anarchist Mountain Observatory 08:24:05 -17.6 AT Down 14.2 189.4 Really Low 08:09:05 - 08:39:05 15104
Tonasket 08:24:05 -17.9 AT Down 14.5 189.3 Really Low 08:09:05 - 08:39:05 15095
Victoria 08:24:16 -18.3 Dark Down 15.1 185.7 Really Low 08:09:16 - 08:39:16 15090
Okanogan 08:24:05 -18.2 Dark Down 14.9 189.2 Really Low 08:09:05 - 08:39:05 15085
Brewster 08:24:05 -18.5 Dark Down 15.2 189.0 Really Low 08:09:05 - 08:39:05 15077
Manson/Chelan 08:24:06 -18.7 Dark Down 15.4 188.7 Really Low 08:09:06 - 08:39:06 15072
Wenatchee 08:24:06 -19.2 Dark Down 15.9 188.6 Really Low 08:09:06 - 08:39:06 15057
Ellensburg 08:24:07 -19.7 Dark Down 16.3 188.4 Really Low 08:09:07 - 08:39:07 15045
Yakima 08:24:07 -20.1 Dark Down 16.7 188.4 Really Low 08:09:07 - 08:39:07 15031
Toppenish/White Swan 08:24:06 -20.3 Dark Down 16.9 188.5 Really Low 08:09:06 - 08:39:06 15024
Pasco 08:24:02 -20.3 Dark Down 16.9 189.7 Really Low 08:09:02 - 08:39:02 15019
PNWRO 08:24:02 -20.5 Dark Down 17.1 189.9 Really Low 08:09:02 - 08:39:02 15010
Goldendale 08:24:07 -20.8 Dark Down 17.5 188.2 Really Low 08:09:07 - 08:39:07 15006
The Dalles 08:24:08 -21.1 Dark Down 17.8 187.8 Really Low 08:09:08 - 08:39:08 14998
Maupin 08:24:08 -21.5 Dark Down 18.2 188.0 Really Low 08:09:08 - 08:39:08 14984
Sisters 08:24:09 -22.4 Dark Down 19.1 187.5 Really Low 08:09:09 - 08:39:09 14953
Redmond 08:24:07 -22.4 Dark Down 19.1 187.9 Really Low 08:09:07 - 08:39:07 14952
Bend 08:24:08 -22.6 Dark Down 19.3 187.8 Really Low 08:09:08 - 08:39:08 14944
Oregon Observatory 08:24:07 -22.8 Dark Down 19.5 187.7 Really Low 08:09:07 - 08:39:07 14938
La Pine/Gilchrist 08:24:09 -23.0 Dark Down 19.7 187.6 Really Low 08:09:09 - 08:39:09 14930
North Lake 08:24:06 -23.4 Dark Down 20.1 188.2 Low 08:09:06 - 08:39:06 14914
Paisley 08:24:05 -23.9 Dark Down 20.6 188.6 Low 08:09:05 - 08:39:05 14892
Klamath Falls 08:24:07 -24.5 Dark Down 21.2 187.4 Low 08:09:07 - 08:39:07 14874
Lakeview 08:24:04 -24.4 Dark Down 21.1 188.8 Low 08:09:04 - 08:39:04 14872
Cedarville 08:24:03 -25.1 Dark Down 21.7 189.0 Low 08:09:03 - 08:39:03 14844
Fall River/Burney 08:24:06 -25.6 Dark Down 22.3 187.9 Low 08:09:06 - 08:39:06 14824
Susanville 08:24:03 -26.2 Dark Down 22.9 188.6 Low 08:09:03 - 08:39:03 14797
Greenville 08:24:04 -26.5 Dark Down 23.2 188.3 Low 08:09:04 - 08:39:04 14785
Gimple 08:24:04 -26.5 Dark Down 23.2 188.4 Low 08:09:04 - 08:39:04 14785
Quincy 08:24:04 -26.7 Dark Down 23.4 188.4 Low 08:09:04 - 08:39:04 14776
Portola 08:24:03 -26.8 Dark Down 23.4 188.8 Low 08:09:03 - 08:39:03 14770
Reno 08:24:01 -27.0 Dark Down 23.6 189.5 Low 08:09:01 - 08:39:01 14758
Carson City 08:24:00 -27.4 Dark Down 24.0 189.5 Low 08:09:00 - 08:39:00 14741
Yerington 08:23:58 -27.5 Dark Down 24.1 190.1 Low 08:08:58 - 08:38:58 14731
Gardnerville 08:24:00 -27.6 Dark Down 24.2 189.6 Low 08:09:00 - 08:39:00 14730
Hawthorne 08:23:56 -27.9 Dark Down 24.5 190.7 Low 08:08:56 - 08:38:56 14709
Dunrhomin 08:23:14 -23.7 Dark Down 19.8 202.9 Really Low 08:08:14 - 08:38:14 14702
Lee Vining 08:23:57 -28.5 Dark Down 25.1 190.3 Low 08:08:57 - 08:38:57 14683
Tonopah 08:23:51 -28.2 Dark Down 24.7 192.1 Low 08:08:51 - 08:38:51 14683
Bishop 08:23:53 -29.0 Dark Down 25.6 191.0 Low 08:08:53 - 08:38:53 14652
Beatty 08:23:49 -29.3 Dark Down 25.8 192.6 Low 08:08:49 - 08:38:49 14624
Indian Springs 08:23:44 -29.5 Dark Down 25.9 193.7 Low 08:08:44 - 08:38:44 14604
Henderson 08:23:41 -29.9 Dark Down 26.3 194.4 Low 08:08:41 - 08:38:41 14573
CPSLO 08:24:01 -31.3 Dark Down 27.9 189.0 Low 08:09:01 - 08:39:01 14550
Patrick 08:23:38 -30.3 Dark Down 26.6 195.6 Low 08:08:38 - 08:38:38 14535
Laughlin/Bullhead City 08:23:39 -30.7 Dark Down 27.0 194.9 Low 08:08:39 - 08:38:39 14525
Kingman/Dolan Springs 08:23:37 -30.6 Dark Down 26.9 195.4 Low 08:08:37 - 08:38:37 14525
Mohave Valley 08:23:40 -30.9 Dark Down 27.3 195.0 Low 08:08:40 - 08:38:40 14511
Lake Havasu City 08:23:38 -31.3 Dark Down 27.6 195.3 Low 08:08:38 - 08:38:38 14488
Wildwood 08:23:53 -32.3 Dark Down 28.8 191.1 Low 08:08:53 - 08:38:53 14482
Parker 08:23:38 -31.6 Dark Down 28.0 195.3 Low 08:08:38 - 08:38:38 14469
Idyllwild 08:23:47 -32.4 Dark Down 28.8 193.0 Low 08:08:47 - 08:38:47 14458
Blythe 08:23:39 -32.2 Dark Down 28.5 195.1 Low 08:08:39 - 08:38:39 14441
George/Scottsdale 08:23:29 -31.6 Dark Down 27.8 197.8 Low 08:08:29 - 08:38:29 14431
Calipatria 08:23:41 -32.8 Dark Down 29.2 194.3 Low 08:08:41 - 08:38:41 14418
Yuma 08:23:38 -33.1 Dark Down 29.4 195.2 Low 08:08:38 - 08:38:38 14389

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 307251, (2021/06/12 08:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.01 147
23Tau Sco      16:35:52.9 -28:12:58  2.8  7.76 149
PPM 266416     17:06:53.2 -26:30:47  6.3  0.68 156
PPM 266507     17:10:32.5 -26:14:44  8.3  0.21 156
PPM 266475     17:09:16.4 -26:04:09  9.5  0.16 156
307251         17:09:37.2 -26:12:52 16.4       156
Positions are for J2000

Event circumstances last updated at 2021/01/22 20:55:57 UT

Marc W. Buie, Southwest Research Institute

RECON