RECON: TNO occultation with 310071

Event between (310071) 10KR59 and star GA0660:06558176 with event index number of 1147588

Geocentric closest approach at 2021/05/28 04:47:49 UTC

J2000 position of star is 15:31:30.9 -22:53:34
Equinox of date position of star is 15:32:44.9 -22:57:47
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 35 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=20.5

[RECON map]
TNO is 18.9 AU from the Sun and 17.9 AU from the Earth.
The TNO is moving 22.3 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 29 seconds.
The 1-sigma cross-track error in the shadow position is 649 km.
The sky-plane scale is 12969.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.8
Diameter=162.2 km assuming a 5% albedo -- 7.3 sec chord
Diameter=66.2 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 310071, (2021/05/28 04:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.4 -26:28:40  0.9 13.61  22
7Del Sco       16:01:36.2 -22:40:51  2.3  6.65  29
PPM 264469     15:39:03.8 -23:12:40  5.8  1.47  34
PPM 264387     15:34:31.6 -23:32:09  8.3  0.70  35
PPM 264353     15:33:06.7 -22:55:17  9.5  0.09  35
310071         15:32:46.4 -22:57:52 16.7        35
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 5.0 sigma about the mid-time.
The median site spacing is 8.6 km RECON observability=0.4 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 04:50:08 -7.5 NT Down 11.0 148.6 Really Low 04:47:13 - 04:53:04 6839
Kelowna 04:50:09 -7.7 NT Down 11.3 148.4 Really Low 04:47:13 - 04:53:04 6818
Peachland 04:50:10 -7.7 NT Down 11.3 148.2 Really Low 04:47:14 - 04:53:05 6806
Summerland 04:50:10 -7.8 NT Down 11.4 148.2 Really Low 04:47:14 - 04:53:05 6801
Penticton 04:50:10 -7.9 NT Down 11.5 148.3 Really Low 04:47:14 - 04:53:05 6801
Oliver 04:50:10 -8.2 NT Down 11.8 148.3 Really Low 04:47:15 - 04:53:06 6784
Anarchist Mountain Observatory 04:50:10 -8.4 NT Down 12.1 148.4 Really Low 04:47:14 - 04:53:05 6782
Tonasket 04:50:11 -8.6 NT Down 12.3 148.4 Really Low 04:47:15 - 04:53:06 6765
Okanogan 04:50:12 -8.8 NT Down 12.5 148.2 Really Low 04:47:17 - 04:53:08 6745
Brewster 04:50:13 -8.9 NT Down 12.7 148.0 Really Low 04:47:17 - 04:53:08 6727
Manson/Chelan 04:50:14 -8.9 NT Down 12.7 147.6 Really Low 04:47:19 - 04:53:10 6708
Dunrhomin 04:49:39 -21.4 Dark Up 24.2 160.1 Low 04:46:43 - 04:52:34 6682
Wenatchee 04:50:16 -9.2 NT Down 13.1 147.4 Really Low 04:47:20 - 04:53:11 6680
Victoria 04:50:21 -6.9 NT Down 11.0 144.9 Really Low 04:47:25 - 04:53:16 6655
Ellensburg 04:50:17 -9.4 NT Down 13.3 147.2 Really Low 04:47:21 - 04:53:12 6654
Pasco 04:50:14 -10.6 NT Down 14.5 148.3 Really Low 04:47:19 - 04:53:10 6653
PNWRO 04:50:14 -10.9 NT Down 14.8 148.5 Really Low 04:47:18 - 04:53:09 6647
Yakima 04:50:17 -9.6 NT Down 13.7 147.1 Really Low 04:47:22 - 04:53:13 6633
Toppenish/White Swan 04:50:17 -9.9 NT Down 13.9 147.3 Really Low 04:47:22 - 04:53:13 6626
Goldendale 04:50:20 -10.1 NT Down 14.2 146.8 Really Low 04:47:24 - 04:53:15 6587
The Dalles 04:50:21 -10.1 NT Down 14.3 146.5 Really Low 04:47:25 - 04:53:16 6565
Maupin 04:50:21 -10.4 NT Down 14.7 146.5 Really Low 04:47:26 - 04:53:17 6546
Redmond 04:50:23 -11.0 NT Down 15.4 146.3 Really Low 04:47:28 - 04:53:19 6495
Sisters 04:50:24 -10.8 NT Down 15.2 146.0 Really Low 04:47:29 - 04:53:20 6485
Bend 04:50:24 -11.1 NT Down 15.5 146.1 Really Low 04:47:29 - 04:53:20 6479
Oregon Observatory 04:50:25 -11.2 NT Down 15.6 146.0 Really Low 04:47:29 - 04:53:20 6466
La Pine/Gilchrist 04:50:25 -11.3 NT Down 15.8 145.9 Really Low 04:47:29 - 04:53:20 6453
North Lake 04:50:24 -11.9 NT Down 16.4 146.4 Really Low 04:47:28 - 04:53:19 6446
Paisley 04:50:24 -12.5 AT Down 17.0 146.6 Really Low 04:47:28 - 04:53:19 6424
Lakeview 04:50:25 -12.9 AT Down 17.5 146.7 Really Low 04:47:29 - 04:53:20 6401
Cedarville 04:50:24 -13.5 AT Down 18.1 146.7 Really Low 04:47:29 - 04:53:20 6368
Klamath Falls 04:50:28 -12.2 AT Down 16.9 145.5 Really Low 04:47:33 - 04:53:24 6362
Fall River/Burney 04:50:29 -13.2 AT Down 18.0 145.6 Really Low 04:47:33 - 04:53:24 6304
Susanville 04:50:27 -14.0 AT Down 18.8 146.1 Really Low 04:47:32 - 04:53:23 6288
Gimple 04:50:29 -14.1 AT Down 19.0 145.9 Really Low 04:47:34 - 04:53:25 6264
Greenville 04:50:29 -14.1 AT Down 18.9 145.8 Really Low 04:47:33 - 04:53:24 6262
Reno 04:50:26 -15.1 AT Down 19.9 146.7 Really Low 04:47:31 - 04:53:22 6259
Portola 04:50:28 -14.6 AT Down 19.4 146.1 Really Low 04:47:32 - 04:53:23 6256
Quincy 04:50:29 -14.2 AT Down 19.1 145.8 Really Low 04:47:34 - 04:53:25 6250
Yerington 04:50:25 -15.8 AT Down 20.6 147.1 Low 04:47:30 - 04:53:21 6244
Tonopah 04:50:21 -17.6 AT Down 22.2 148.6 Low 04:47:25 - 04:53:16 6242
Carson City 04:50:27 -15.4 AT Down 20.2 146.6 Low 04:47:32 - 04:53:23 6238
Hawthorne 04:50:24 -16.5 AT Down 21.3 147.5 Low 04:47:28 - 04:53:19 6230
Gardnerville 04:50:27 -15.6 AT Down 20.4 146.6 Low 04:47:32 - 04:53:23 6224
Indian Springs 04:50:17 -19.5 Dark Up 24.1 149.7 Low 04:47:21 - 04:53:12 6192
Beatty 04:50:21 -18.7 Dark Down 23.4 148.8 Low 04:47:25 - 04:53:16 6182
Lee Vining 04:50:27 -16.6 AT Down 21.5 146.9 Low 04:47:31 - 04:53:22 6181
Henderson 04:50:16 -20.2 Dark Up 24.9 150.2 Low 04:47:20 - 04:53:11 6177
Patrick 04:50:12 -21.3 Dark Up 25.9 151.0 Low 04:47:17 - 04:53:08 6169
Bishop 04:50:25 -17.4 AT Down 22.3 147.4 Low 04:47:29 - 04:53:20 6164
Kingman/Dolan Springs 04:50:13 -21.4 Dark Up 26.0 150.8 Low 04:47:18 - 04:53:09 6149
Laughlin/Bullhead City 04:50:15 -21.1 Dark Up 25.8 150.3 Low 04:47:19 - 04:53:10 6132
Mohave Valley 04:50:15 -21.3 Dark Up 26.0 150.3 Low 04:47:19 - 04:53:10 6114
George/Scottsdale 04:50:07 -23.7 Dark Up 28.1 152.5 Low 04:47:11 - 04:53:02 6113
Lake Havasu City 04:50:14 -21.8 Dark Up 26.5 150.4 Low 04:47:19 - 04:53:10 6095
Parker 04:50:15 -22.0 Dark Up 26.8 150.3 Low 04:47:19 - 04:53:10 6072
Blythe 04:50:16 -22.3 Dark Up 27.1 149.9 Low 04:47:21 - 04:53:12 6028
Idyllwild 04:50:23 -21.0 Dark Up 26.1 148.1 Low 04:47:28 - 04:53:19 5974
Calipatria 04:50:20 -22.1 Dark Up 27.2 149.0 Low 04:47:24 - 04:53:15 5967
Yuma 04:50:17 -22.9 Dark Up 27.9 149.7 Low 04:47:22 - 04:53:13 5963
CPSLO 04:50:35 -17.6 AT Down 23.0 145.0 Low 04:47:39 - 04:53:30 5959
Wildwood 04:50:29 -19.7 Dark Down 25.0 146.5 Low 04:47:34 - 04:53:25 5941

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 310071, (2021/05/28 04:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.61  22
7Del Sco       16:00:20.0 -22:37:18  2.3  6.65  29
PPM 264469     15:37:48.0 -23:08:32  5.8  1.47  34
PPM 264387     15:33:15.8 -23:27:54  8.3  0.70  35
PPM 264353     15:31:51.2 -22:50:59  9.5  0.09  35
310071         15:31:30.9 -22:53:34 16.7        35
Positions are for J2000

Event circumstances last updated at 2020/12/24 01:35:27 UT

Marc W. Buie, Southwest Research Institute

RECON