RECON: TNO occultation with 471335

Event between (471335) 11OD16 and star GA0880:19268600 with event index number of 283879

Geocentric closest approach at 2020/08/20 08:58:20 UTC

J2000 position of star is 23:53:23.0 -01:59:10
Equinox of date position of star is 23:54:26.3 -01:52:18
Stellar brightness G=16.1, use SENSEUP=128
Star is 167 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 19.6 AU from the Sun and 18.7 AU from the Earth.
The TNO is moving 18.4 km/sec on the sky relative to the star, or, 4.9 arcsec/hr.
The 1-sigma error in the time of the event is 39 seconds.
The 1-sigma cross-track error in the shadow position is 695 km.
The sky-plane scale is 13564.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=114.8 km assuming a 5% albedo -- 3.3 sec chord
Diameter=46.9 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 471335, (2020/08/20 08:58UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:47.2 -29:30:45  1.2 30.64 161
Algenib        00:14:18.1 +15:17:53  2.8 17.86 150
24 Psc         23:53:59.2 -03:02:27  6.2  1.18 168
PPM 208118     23:55:42.1 -01:49:53  7.6  0.32 167
PPM 208095     23:55:00.0 -02:06:18  9.5  0.27 167
PPM 208088     23:54:24.1 -02:02:25 10.1  0.17 167
471335         23:54:26.4 -01:52:16 16.1       167
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 14.9 km RECON observability=1.0 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)
Victoria 08:57:28 -28.6 Dark Down 37.1 156.9 Up 08:53:42 - 09:01:13 6109
Clarence Fulton 08:57:09 -26.3 Dark Down 36.4 162.3 Up 08:53:24 - 09:00:55 6075
Peachland 08:57:12 -26.9 Dark Down 36.7 161.6 Up 08:53:27 - 09:00:58 6062
Kelowna 08:57:11 -26.7 Dark Down 36.7 162.0 Up 08:53:25 - 09:00:56 6059
Summerland 08:57:12 -27.0 Dark Down 36.9 161.7 Up 08:53:26 - 09:00:57 6052
Penticton 08:57:12 -27.0 Dark Down 37.0 161.8 Up 08:53:27 - 09:00:58 6045
Oliver 08:57:13 -27.4 Dark Down 37.3 161.7 Up 08:53:28 - 09:00:59 6026
Anarchist Mountain Observatory 08:57:12 -27.5 Dark Down 37.5 161.9 Up 08:53:26 - 09:00:57 6011
Tonasket 08:57:13 -27.8 Dark Down 37.8 161.8 Up 08:53:28 - 09:00:59 5996
Okanogan 08:57:14 -28.2 Dark Down 38.1 161.5 Up 08:53:29 - 09:01:00 5983
Manson/Chelan 08:57:18 -28.7 Dark Down 38.4 160.7 Up 08:53:32 - 09:01:03 5975
Brewster 08:57:17 -28.5 Dark Down 38.3 161.2 Up 08:53:31 - 09:01:02 5974
Entiat 08:57:19 -28.9 Dark Down 38.6 160.6 Up 08:53:34 - 09:01:05 5965
Wenatchee 08:57:20 -29.2 Dark Down 38.8 160.4 Up 08:53:35 - 09:01:06 5954
Ellensburg 08:57:21 -29.6 Dark Down 39.2 160.0 Up 08:53:36 - 09:01:07 5938
Yakima 08:57:23 -30.0 Dark Down 39.6 159.9 Up 08:53:38 - 09:01:09 5916
Toppenish/White Swan 08:57:24 -30.2 Dark Down 39.8 160.0 Up 08:53:38 - 09:01:09 5898
Goldendale 08:57:27 -30.8 Dark Down 40.2 159.3 Up 08:53:41 - 09:01:12 5880
The Dalles 08:57:29 -31.1 Dark Down 40.3 158.8 Up 08:53:43 - 09:01:14 5879
Maupin 08:57:28 -31.5 Dark Down 40.8 158.8 Up 08:53:43 - 09:01:14 5852
Pasco 08:57:19 -30.1 Dark Down 40.2 161.6 Up 08:53:34 - 09:01:05 5849
PNWRO 08:57:19 -30.3 Dark Down 40.5 161.8 Up 08:53:34 - 09:01:05 5828
Sisters 08:57:33 -32.4 Dark Down 41.5 157.9 Up 08:53:48 - 09:01:19 5817
Redmond 08:57:33 -32.4 Dark Down 41.6 158.4 Up 08:53:47 - 09:01:18 5802
Bend 08:57:34 -32.6 Dark Down 41.8 158.2 Up 08:53:48 - 09:01:19 5794
Oregon Observatory 08:57:34 -32.8 Dark Down 41.9 157.9 Up 08:53:48 - 09:01:19 5788
La Pine/Gilchrist 08:57:34 -33.0 Dark Down 42.1 157.8 Up 08:53:49 - 09:01:20 5778
North Lake 08:57:34 -33.3 Dark Down 42.6 158.4 Up 08:53:48 - 09:01:19 5731
Klamath Falls 08:57:40 -34.5 Dark Down 43.3 157.0 Up 08:53:55 - 09:01:26 5698
Paisley 08:57:34 -33.8 Dark Down 43.2 158.7 Up 08:53:49 - 09:01:20 5685
Lakeview 08:57:34 -34.2 Dark Down 43.8 158.8 Up 08:53:49 - 09:01:20 5647
Fall River/Burney 08:57:42 -35.5 Dark Down 44.5 157.0 Up 08:53:57 - 09:01:28 5611
Cedarville 08:57:36 -34.8 Dark Down 44.4 158.8 Up 08:53:50 - 09:01:21 5599
Susanville 08:57:41 -36.0 Dark Down 45.3 157.8 Up 08:53:56 - 09:01:27 5544
Greenville 08:57:44 -36.3 Dark Down 45.5 157.3 Up 08:53:58 - 09:01:29 5536
Gimple 08:57:43 -36.3 Dark Down 45.5 157.4 Up 08:53:57 - 09:01:28 5533
Quincy 08:57:44 -36.5 Dark Down 45.7 157.2 Up 08:53:59 - 09:01:30 5523
Portola 08:57:43 -36.5 Dark Down 45.9 157.8 Up 08:53:57 - 09:01:28 5498
Reno 08:57:40 -36.7 Dark Down 46.4 158.6 Up 08:53:55 - 09:01:26 5457
Carson City 08:57:42 -37.0 Dark Down 46.7 158.5 Up 08:53:57 - 09:01:28 5432
Gardnerville 08:57:43 -37.2 Dark Down 47.0 158.5 Up 08:53:57 - 09:01:28 5414
Yerington 08:57:41 -37.0 Dark Down 47.1 159.3 Up 08:53:55 - 09:01:26 5395
Hawthorne 08:57:39 -37.3 Dark Down 47.6 159.9 Up 08:53:54 - 09:01:25 5344
Lee Vining 08:57:43 -38.0 Dark Down 48.0 159.0 Up 08:53:57 - 09:01:28 5324
Tonopah 08:57:34 -37.4 Dark Down 48.4 161.7 Up 08:53:49 - 09:01:20 5259
Bishop 08:57:42 -38.4 Dark Down 48.8 159.8 Up 08:53:56 - 09:01:27 5255
CPSLO 08:57:57 -40.9 Dark Down 50.0 155.7 Up 08:54:11 - 09:01:42 5194
Beatty 08:57:35 -38.4 Dark Down 49.7 162.0 Up 08:53:50 - 09:01:21 5160
Indian Springs 08:57:32 -38.4 Dark Down 50.2 163.5 Up 08:53:47 - 09:01:18 5095
Henderson 08:57:31 -38.6 Dark Down 50.9 164.4 Up 08:53:45 - 09:01:16 5029
Wildwood 08:57:52 -41.5 Dark Down 51.8 158.1 Up 08:54:06 - 09:01:37 5026
Searchlight/Boulder City 08:57:32 -39.1 Dark Down 51.5 164.3 Up 08:53:46 - 09:01:17 4984
Niwot 08:56:41 -31.5 Dark Down 47.9 179.7 Up 08:52:55 - 09:00:26 4952
Laughlin/Bullhead City 08:57:32 -39.3 Dark Down 51.8 164.7 Up 08:53:46 - 09:01:17 4948
SwRI 08:56:40 -31.6 Dark Down 48.0 179.6 Up 08:52:54 - 09:00:25 4947
Patrick 08:57:27 -38.8 Dark Down 51.7 165.9 Up 08:53:41 - 09:01:12 4939
Kingman/Dolan Springs 08:57:29 -39.1 Dark Down 51.9 165.5 Up 08:53:44 - 09:01:15 4929
Mohave Valley 08:57:32 -39.5 Dark Down 52.1 164.6 Up 08:53:47 - 09:01:18 4927
Idyllwild 08:57:45 -41.3 Dark Down 52.7 160.9 Up 08:53:59 - 09:01:30 4926
DCO 08:57:25 -38.9 Dark Down 52.2 166.9 Up 08:53:40 - 09:01:11 4888
Lake Havasu City 08:57:32 -39.8 Dark Down 52.5 164.9 Up 08:53:46 - 09:01:17 4887
Parker 08:57:33 -40.1 Dark Down 52.9 164.8 Up 08:53:48 - 09:01:19 4859
Blythe 08:57:35 -40.7 Dark Down 53.3 164.2 Up 08:53:50 - 09:01:21 4831
Calipatria 08:57:41 -41.5 Dark Down 53.6 162.5 Up 08:53:56 - 09:01:27 4831
Yuma 08:57:37 -41.6 Dark Down 54.2 163.8 Up 08:53:52 - 09:01:23 4762
George/Scottsdale 08:57:23 -39.6 Dark Down 53.7 168.6 Up 08:53:37 - 09:01:08 4729

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 471335, (2020/08/20 08:58UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:23  1.2 30.64 161
Algenib        00:13:14.2 +15:11:01  2.8 17.86 150
24 Psc         23:52:55.7 -03:09:21  6.2  1.18 168
PPM 208118     23:54:38.7 -01:56:47  7.6  0.32 167
PPM 208095     23:53:56.5 -02:13:12  9.5  0.27 167
PPM 208088     23:53:20.6 -02:09:19 10.1  0.17 167
471335         23:53:23.0 -01:59:10 16.1       167
Positions are for J2000

Event circumstances last updated at 2020/07/30 21:48:26 UT

Marc W. Buie, Southwest Research Institute

RECON