RECON: TNO occultation with 523740

Event between (523740) 14TV85 and star GA0800:04055617 with event index number of 1055154

Geocentric closest approach at 2021/02/10 11:23:49 UTC

J2000 position of star is 11:02:57.5 -08:00:22
Equinox of date position of star is 11:04:01.1 -08:07:10
Stellar brightness G=14.3, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 133 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 14.7 AU from the Sun and 13.8 AU from the Earth.
The TNO is moving 17.8 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 32 seconds.
The 1-sigma cross-track error in the shadow position is 517 km.
The sky-plane scale is 10006.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.6
Diameter=74.1 km assuming a 5% albedo -- 4.2 sec chord
Diameter=30.3 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523740, (2021/02/10 11:24UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.6 +11:51:48  1.3 24.15 156
4Gam Crv       12:16:53.7 -17:39:33  2.6 20.13 113
PPM 223913     11:06:37.6 -11:12:13  6.1  3.15 130
PPM 194055     11:04:04.3 -08:30:14  8.3  0.38 133
PPM 194046     11:03:33.2 -08:00:56  9.6  0.16 133
523740         11:04:01.4 -08:07:12 14.3       133
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 16.6 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)
Clarence Fulton 11:23:16 -37.1 Dark Down 27.4 209.9 Low 11:20:06 - 11:26:27 6102
Kelowna 11:23:16 -37.4 Dark Down 27.7 209.8 Low 11:20:06 - 11:26:27 6081
Peachland 11:23:17 -37.6 Dark Down 27.9 209.5 Low 11:20:06 - 11:26:27 6072
Summerland 11:23:15 -37.6 Dark Down 28.0 209.7 Low 11:20:05 - 11:26:26 6066
Penticton 11:23:16 -37.6 Dark Down 28.1 209.8 Low 11:20:05 - 11:26:26 6063
Oliver 11:23:15 -37.7 Dark Down 28.4 209.9 Low 11:20:04 - 11:26:25 6045
Anarchist Mountain Observatory 11:23:13 -37.7 Dark Down 28.4 210.1 Low 11:20:03 - 11:26:24 6039
Tonasket 11:23:12 -37.9 Dark Down 28.7 210.1 Low 11:20:02 - 11:26:23 6022
Okanogan 11:23:12 -38.1 Dark Down 29.1 210.1 Low 11:20:02 - 11:26:23 6002
Brewster 11:23:12 -38.3 Dark Down 29.4 209.9 Low 11:20:02 - 11:26:23 5986
Manson/Chelan 11:23:13 -38.6 Dark Down 29.7 209.6 Low 11:20:02 - 11:26:23 5971
Victoria 11:23:27 -40.3 Dark Down 30.1 205.9 Up 11:20:16 - 11:26:37 5969
Wenatchee 11:23:12 -38.9 Dark Down 30.2 209.5 Up 11:20:02 - 11:26:23 5943
Ellensburg 11:23:13 -39.3 Dark Down 30.6 209.4 Up 11:20:02 - 11:26:23 5918
Yakima 11:23:11 -39.4 Dark Down 31.0 209.5 Up 11:20:01 - 11:26:22 5895
Pasco 11:23:05 -38.7 Dark Down 30.7 211.1 Up 11:19:54 - 11:26:15 5892
Toppenish/White Swan 11:23:10 -39.4 Dark Down 31.1 209.8 Up 11:19:59 - 11:26:20 5885
PNWRO 11:23:03 -38.6 Dark Down 30.9 211.5 Up 11:19:53 - 11:26:14 5880
Goldendale 11:23:10 -39.9 Dark Down 31.7 209.5 Up 11:20:00 - 11:26:21 5849
The Dalles 11:23:11 -40.2 Dark Down 32.0 209.1 Up 11:20:01 - 11:26:22 5831
Maupin 11:23:10 -40.3 Dark Down 32.4 209.4 Up 11:19:59 - 11:26:20 5808
Redmond 11:23:08 -40.8 Dark Down 33.2 209.5 Up 11:19:57 - 11:26:18 5754
Sisters 11:23:09 -41.0 Dark Down 33.3 209.1 Up 11:19:59 - 11:26:20 5751
Bend 11:23:07 -40.9 Dark Down 33.4 209.5 Up 11:19:56 - 11:26:17 5740
Oregon Observatory 11:23:07 -41.1 Dark Down 33.6 209.4 Up 11:19:56 - 11:26:17 5728
La Pine/Gilchrist 11:23:07 -41.2 Dark Down 33.8 209.4 Up 11:19:56 - 11:26:17 5715
North Lake 11:23:03 -41.0 Dark Down 34.0 210.2 Up 11:19:53 - 11:26:14 5695
Paisley 11:23:01 -40.9 Dark Down 34.3 210.7 Up 11:19:50 - 11:26:11 5665
Dunrhomin 11:21:54 -30.6 Dark Down 29.1 227.2 Low 11:18:44 - 11:25:05 5657
Lakeview 11:22:58 -41.0 Dark Down 34.7 211.1 Up 11:19:48 - 11:26:09 5636
Klamath Falls 11:23:04 -42.0 Dark Down 35.2 209.5 Up 11:19:54 - 11:26:15 5621
Cedarville 11:22:56 -41.1 Dark Down 35.2 211.5 Up 11:19:45 - 11:26:06 5596
Fall River/Burney 11:23:00 -42.1 Dark Down 36.1 210.4 Up 11:19:49 - 11:26:10 5550
Susanville 11:22:55 -41.8 Dark Down 36.3 211.4 Up 11:19:45 - 11:26:06 5518
Gimple 11:22:56 -42.1 Dark Down 36.7 211.3 Up 11:19:45 - 11:26:06 5497
Greenville 11:22:56 -42.1 Dark Down 36.7 211.2 Up 11:19:45 - 11:26:06 5496
Quincy 11:22:55 -42.2 Dark Down 36.9 211.3 Up 11:19:45 - 11:26:06 5482
Portola 11:22:53 -41.9 Dark Down 36.8 211.9 Up 11:19:43 - 11:26:04 5480
Reno 11:22:50 -41.5 Dark Down 36.7 212.7 Up 11:19:40 - 11:26:01 5470
Carson City 11:22:49 -41.6 Dark Down 37.0 212.8 Up 11:19:38 - 11:25:59 5446
Yerington 11:22:46 -41.2 Dark Down 36.9 213.6 Up 11:19:36 - 11:25:57 5441
Gardnerville 11:22:48 -41.6 Dark Down 37.2 213.0 Up 11:19:37 - 11:25:58 5430
Hawthorne 11:22:41 -40.9 Dark Down 37.1 214.4 Up 11:19:31 - 11:25:52 5415
Tonopah 11:22:35 -40.0 Dark Down 36.8 216.1 Up 11:19:24 - 11:25:45 5400
Lee Vining 11:22:42 -41.5 Dark Down 37.8 214.1 Up 11:19:32 - 11:25:53 5371
Bishop 11:22:38 -41.1 Dark Down 37.9 215.1 Up 11:19:27 - 11:25:48 5338
Beatty 11:22:30 -40.0 Dark Down 37.6 217.1 Up 11:19:19 - 11:25:40 5324
Indian Springs 11:22:24 -39.2 Dark Down 37.3 218.4 Up 11:19:14 - 11:25:35 5313
Henderson 11:22:20 -38.8 Dark Down 37.4 219.4 Up 11:19:09 - 11:25:30 5283
Patrick 11:22:13 -38.0 Dark Down 37.3 220.9 Up 11:19:03 - 11:25:24 5250
Kingman/Dolan Springs 11:22:13 -38.2 Dark Down 37.6 220.8 Up 11:19:02 - 11:25:23 5232
Laughlin/Bullhead City 11:22:16 -38.6 Dark Down 37.8 220.3 Up 11:19:05 - 11:25:26 5224
Mohave Valley 11:22:15 -38.7 Dark Down 38.1 220.4 Up 11:19:04 - 11:25:25 5204
Lake Havasu City 11:22:13 -38.5 Dark Down 38.2 220.9 Up 11:19:02 - 11:25:23 5178
CPSLO 11:22:42 -43.4 Dark Down 40.7 213.5 Up 11:19:32 - 11:25:53 5161
Parker 11:22:11 -38.6 Dark Down 38.5 221.1 Up 11:19:01 - 11:25:22 5152
George/Scottsdale 11:22:00 -36.7 Dark Down 37.5 223.8 Up 11:18:50 - 11:25:11 5146
Blythe 11:22:11 -38.9 Dark Down 39.0 221.0 Up 11:19:01 - 11:25:22 5109
Wildwood 11:22:30 -42.0 Dark Down 40.7 216.4 Up 11:19:19 - 11:25:40 5098
Idyllwild 11:22:21 -40.6 Dark Down 40.1 218.7 Up 11:19:11 - 11:25:32 5095
Calipatria 11:22:14 -39.8 Dark Down 39.9 220.3 Up 11:19:04 - 11:25:25 5061
Yuma 11:22:09 -39.1 Dark Down 39.8 221.5 Up 11:18:59 - 11:25:20 5039

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 523740, (2021/02/10 11:24UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 24.15 156
4Gam Crv       12:15:48.1 -17:32:30  2.6 20.13 113
PPM 223913     11:05:34.0 -11:05:22  6.1  3.15 130
PPM 194055     11:03:00.5 -08:23:24  8.3  0.38 133
PPM 194046     11:02:29.3 -07:54:06  9.6  0.16 133
523740         11:02:57.5 -08:00:22 14.3       133
Positions are for J2000

Event circumstances last updated at 2020/12/30 19:56:13 UT

Marc W. Buie, Southwest Research Institute

RECON