RECON: TNO occultation with 471136

Event between (471136) 10EO65 and star GA0580:30540858 with event index number of 1139064

Geocentric closest approach at 2021/08/07 05:52:58 UTC

J2000 position of star is 18:06:35.5 -31:25:03
Equinox of date position of star is 18:07:57.6 -31:24:50
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 152 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 15.5 AU from the Sun and 14.8 AU from the Earth.
The TNO is moving 13.2 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
The 1-sigma error in the time of the event is 330 seconds.
The 1-sigma cross-track error in the shadow position is 1386 km.
The sky-plane scale is 10705.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 5.7 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 471136, (2021/08/07 05:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:44.1 -26:28:41  0.9 21.79 131
Kap Sco        17:43:59.0 -39:02:20  2.4  9.06 146
10Gam2Sgr      18:07:11.8 -30:25:18  3.0  1.01 152
PPM 297254     18:07:59.6 -31:39:01  8.4  0.24 152
PPM 297240     18:07:32.7 -31:14:22  8.9  0.20 152
471136         18:07:59.5 -31:24:49 16.6       152
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 2.7 sigma about the mid-time.
The median site spacing is 9.6 km RECON observability=0.3 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 05:54:05 -17.6 AT Down 7.5 191.6 Really Low 05:39:05 - 06:09:05 7339
Kelowna 05:54:05 -17.9 AT Down 7.9 191.5 Really Low 05:39:05 - 06:09:05 7333
Peachland 05:54:08 -17.9 AT Down 8.0 191.3 Really Low 05:39:08 - 06:09:08 7328
Penticton 05:54:06 -18.1 Dark Down 8.2 191.4 Really Low 05:39:06 - 06:09:06 7327
Summerland 05:54:08 -18.0 Dark Down 8.1 191.3 Really Low 05:39:08 - 06:09:08 7327
Anarchist Mountain Observatory 05:54:04 -18.6 Dark Down 8.7 191.6 Really Low 05:39:04 - 06:09:04 7324
Oliver 05:54:06 -18.4 Dark Down 8.5 191.5 Really Low 05:39:06 - 06:09:06 7323
Tonasket 05:54:04 -18.9 Dark Down 9.0 191.6 Really Low 05:39:04 - 06:09:04 7318
Okanogan 05:54:04 -19.1 Dark Down 9.3 191.4 Really Low 05:39:04 - 06:09:04 7311
Brewster 05:54:05 -19.3 Dark Down 9.6 191.3 Really Low 05:39:05 - 06:09:05 7305
Manson/Chelan 05:54:06 -19.3 Dark Down 9.9 191.0 Really Low 05:39:06 - 06:09:06 7297
Wenatchee 05:54:06 -19.6 Dark Down 10.4 190.9 Really Low 05:39:06 - 06:09:06 7287
Pasco 05:54:03 -21.0 Dark Down 11.3 191.9 Really Low 05:39:03 - 06:09:03 7283
PNWRO 05:54:03 -21.3 Dark Down 11.6 192.1 Really Low 05:39:03 - 06:09:03 7282
Ellensburg 05:54:07 -19.9 Dark Down 10.8 190.7 Really Low 05:39:07 - 06:09:07 7277
Yakima 05:54:07 -20.2 Dark Down 11.2 190.7 Really Low 05:39:07 - 06:09:07 7269
Toppenish/White Swan 05:54:06 -20.5 Dark Down 11.4 190.8 Really Low 05:39:06 - 06:09:06 7268
Victoria 05:54:25 -17.6 AT Down 9.6 188.2 Really Low 05:39:25 - 06:09:25 7260
Dunrhomin 05:52:26 -30.8 Dark Down 14.0 203.8 Really Low 05:37:26 - 06:07:26 7260
Goldendale 05:54:07 -20.7 Dark Down 12.0 190.5 Really Low 05:39:07 - 06:09:07 7251
The Dalles 05:54:08 -20.8 Dark Down 12.3 190.2 Really Low 05:39:08 - 06:09:08 7241
Maupin 05:54:08 -21.2 Dark Down 12.7 190.3 Really Low 05:39:08 - 06:09:08 7234
Redmond 05:54:06 -21.9 Dark Down 13.6 190.2 Really Low 05:39:06 - 06:09:06 7214
Sisters 05:54:08 -21.7 Dark Down 13.6 189.9 Really Low 05:39:08 - 06:09:08 7209
Bend 05:54:07 -22.0 Dark Down 13.8 190.1 Really Low 05:39:07 - 06:09:07 7207
Oregon Observatory 05:54:07 -22.1 Dark Down 14.0 190.0 Really Low 05:39:07 - 06:09:07 7201
La Pine/Gilchrist 05:54:06 -22.2 Dark Down 14.2 190.0 Really Low 05:39:06 - 06:09:06 7196
North Lake 05:54:03 -22.8 Dark Down 14.5 190.5 Really Low 05:39:03 - 06:09:03 7194
Paisley 05:54:03 -23.4 Dark Down 15.0 190.9 Really Low 05:39:03 - 06:09:03 7186
Lakeview 05:54:03 -23.9 Dark Down 15.5 191.0 Really Low 05:39:03 - 06:09:03 7176
Chiloquin 05:54:07 -23.0 Dark Down 15.3 189.7 Really Low 05:39:07 - 06:09:07 7162
Cedarville 05:54:03 -24.5 Dark Down 16.1 191.2 Really Low 05:39:03 - 06:09:03 7161
Klamath Falls 05:54:06 -23.3 Dark Down 15.7 189.8 Really Low 05:39:06 - 06:09:06 7155
Fall River/Burney 05:54:03 -24.4 Dark Down 16.8 190.2 Really Low 05:39:03 - 06:09:03 7128
Susanville 05:54:03 -25.2 Dark Down 17.3 190.9 Really Low 05:39:03 - 06:09:03 7122
Gimple 05:54:03 -25.4 Dark Down 17.6 190.7 Really Low 05:39:03 - 06:09:03 7110
Greenville 05:54:03 -25.3 Dark Down 17.6 190.6 Really Low 05:39:03 - 06:09:03 7109
Reno 05:53:50 -26.3 Dark Down 18.0 191.6 Really Low 05:38:50 - 06:08:50 7108
Portola 05:54:03 -25.8 Dark Down 17.9 191.1 Really Low 05:39:03 - 06:09:03 7107
Quincy 05:54:03 -25.5 Dark Down 17.8 190.7 Really Low 05:39:03 - 06:09:03 7103
Yerington 05:53:45 -27.0 Dark Down 18.5 192.2 Really Low 05:38:45 - 06:08:45 7100
Tonopah 05:53:30 -28.6 Dark Down 19.0 194.0 Really Low 05:38:30 - 06:08:30 7097
Carson City 05:53:48 -26.6 Dark Down 18.4 191.7 Really Low 05:38:48 - 06:08:48 7097
Hawthorne 05:53:40 -27.6 Dark Down 18.8 192.7 Really Low 05:38:40 - 06:08:40 7092
Gardnerville 05:53:48 -26.8 Dark Down 18.6 191.7 Really Low 05:38:48 - 06:08:48 7090
Lee Vining 05:53:40 -27.9 Dark Down 19.5 192.3 Really Low 05:38:40 - 06:08:40 7067
Indian Springs 05:53:18 -30.5 Dark Down 20.2 195.4 Low 05:38:18 - 06:08:18 7064
Beatty 05:53:25 -29.8 Dark Down 20.1 194.4 Low 05:38:25 - 06:08:25 7062
Bishop 05:53:36 -28.7 Dark Down 19.9 193.0 Really Low 05:38:36 - 06:08:36 7056
Henderson 05:53:13 -31.2 Dark Down 20.5 196.0 Low 05:38:13 - 06:08:13 7053
Patrick 05:53:04 -32.2 Dark Down 20.9 197.1 Low 05:38:04 - 06:08:04 7042
Kingman/Dolan Springs 05:53:03 -32.4 Dark Down 21.2 196.9 Low 05:38:03 - 06:08:03 7032
Laughlin/Bullhead City 05:53:08 -32.2 Dark Down 21.3 196.5 Low 05:38:08 - 06:08:08 7024
Mohave Valley 05:53:07 -32.4 Dark Down 21.6 196.5 Low 05:38:07 - 06:08:07 7014
Lake Havasu City 05:53:05 -32.8 Dark Down 21.9 196.8 Low 05:38:05 - 06:08:05 7001
George/Scottsdale 05:52:47 -34.5 Dark Down 22.0 199.0 Low 05:37:47 - 06:07:47 6996
Parker 05:53:03 -33.1 Dark Down 22.2 196.8 Low 05:38:03 - 06:08:03 6988
Blythe 05:53:04 -33.5 Dark Down 22.8 196.6 Low 05:38:04 - 06:08:04 6963
CPSLO 05:53:47 -29.3 Dark Down 22.3 191.2 Low 05:38:47 - 06:08:47 6945
Idyllwild 05:53:18 -32.4 Dark Down 23.1 194.8 Low 05:38:18 - 06:08:18 6943
Calipatria 05:53:10 -33.5 Dark Down 23.5 195.9 Low 05:38:10 - 06:08:10 6931
Wildwood 05:53:31 -31.2 Dark Down 23.2 193.1 Low 05:38:31 - 06:08:31 6929
Yuma 05:53:02 -34.2 Dark Down 23.7 196.7 Low 05:38:02 - 06:08:02 6924

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 471136, (2021/08/07 05:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.79 131
Kap Sco        17:42:29.3 -39:01:49  2.4  9.06 146
10Gam2Sgr      18:05:48.4 -30:25:31  3.0  1.01 152
PPM 297254     18:06:35.4 -31:39:15  8.4  0.24 152
PPM 297240     18:06:08.8 -31:14:34  8.9  0.20 152
471136         18:06:35.5 -31:25:03 16.6       152
Positions are for J2000

Event circumstances last updated at 2021/02/07 20:50:39 UT

Marc W. Buie, Southwest Research Institute

RECON