RECON: TNO occultation with 472651

Event between (472651) 15DB216 and star GA0860:04067170 with event index number of 1062529

Geocentric closest approach at 2021/04/09 09:59:02 UTC

J2000 position of star is 12:19:20.7 -02:03:56
Equinox of date position of star is 12:20:26.0 -02:10:59
Stellar brightness G=10.4, use SENSEUP=4 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 164 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=20.2

[RECON map]
TNO is 14.6 AU from the Sun and 13.7 AU from the Earth.
The TNO is moving 22.9 km/sec on the sky relative to the star, or, 8.3 arcsec/hr.
The 1-sigma error in the time of the event is 24 seconds.
The 1-sigma cross-track error in the shadow position is 636 km.
The sky-plane scale is 9907.1 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=117.0 km assuming a 5% albedo -- 5.1 sec chord
Diameter=47.7 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 472651, (2021/04/09 09:59UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:19.0 -11:16:18  1.0 18.70 145
4Gam Crv       12:16:54.2 -17:39:36  2.6 15.50 151
13 Vir         12:19:45.8 -00:54:19  5.9  1.29 165
PPM 195364     12:20:19.0 -03:26:17  8.1  1.26 163
PPM 178751     12:20:29.6 -02:20:55  9.8  0.17 163
PPM 178749     12:20:12.9 -02:09:30 10.2  0.06 164
472651         12:20:26.2 -02:11:00 10.4       163
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 19.5 km RECON observability=1.0 and success probability=0.3%
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 09:57:41 -26.5 Dark Down 26.0 229.5 Low 09:55:12 - 10:00:11 3629
Kelowna 09:57:40 -26.9 Dark Down 26.3 229.5 Low 09:55:11 - 10:00:10 3606
Peachland 09:57:41 -27.1 Dark Down 26.6 229.2 Low 09:55:11 - 10:00:10 3597
Summerland 09:57:40 -27.2 Dark Down 26.6 229.4 Low 09:55:11 - 10:00:10 3589
Penticton 09:57:40 -27.2 Dark Down 26.6 229.5 Low 09:55:10 - 10:00:09 3586
Oliver 09:57:38 -27.5 Dark Down 26.8 229.7 Low 09:55:09 - 10:00:08 3565
Anarchist Mountain Observatory 09:57:37 -27.6 Dark Down 26.8 229.9 Low 09:55:08 - 10:00:07 3557
Tonasket 09:57:37 -27.9 Dark Down 27.1 230.0 Low 09:55:07 - 10:00:06 3538
Okanogan 09:57:36 -28.2 Dark Down 27.4 229.9 Low 09:55:07 - 10:00:06 3516
Brewster 09:57:36 -28.5 Dark Down 27.7 229.8 Low 09:55:06 - 10:00:05 3498
Victoria 09:57:46 -29.4 Dark Down 29.1 226.1 Low 09:55:16 - 10:00:15 3494
Manson/Chelan 09:57:36 -28.8 Dark Down 28.0 229.6 Low 09:55:07 - 10:00:06 3483
Wenatchee 09:57:35 -29.3 Dark Down 28.4 229.6 Low 09:55:06 - 10:00:05 3452
Ellensburg 09:57:34 -29.7 Dark Down 28.8 229.6 Low 09:55:05 - 10:00:04 3424
Yakima 09:57:34 -30.1 Dark Down 29.0 229.7 Low 09:55:04 - 10:00:03 3399
Pasco 09:57:29 -29.8 Dark Down 28.5 231.2 Low 09:54:59 - 09:59:58 3389
Toppenish/White Swan 09:57:32 -30.2 Dark Down 29.1 230.0 Low 09:55:03 - 10:00:02 3386
PNWRO 09:57:28 -29.9 Dark Down 28.5 231.5 Low 09:54:58 - 09:59:57 3375
Goldendale 09:57:32 -30.8 Dark Down 29.7 229.8 Low 09:55:02 - 10:00:01 3347
The Dalles 09:57:32 -31.1 Dark Down 30.0 229.5 Up 09:55:03 - 10:00:02 3329
Maupin 09:57:30 -31.5 Dark Down 30.2 229.8 Up 09:55:01 - 10:00:00 3303
Redmond 09:57:28 -32.3 Dark Down 30.9 230.1 Up 09:54:59 - 09:59:58 3243
Sisters 09:57:30 -32.4 Dark Down 31.1 229.7 Up 09:55:00 - 09:59:59 3241
Bend 09:57:28 -32.5 Dark Down 31.1 230.1 Up 09:54:59 - 09:59:58 3227
Oregon Observatory 09:57:28 -32.7 Dark Down 31.3 230.0 Up 09:54:59 - 09:59:58 3215
La Pine/Gilchrist 09:57:27 -32.9 Dark Down 31.4 230.1 Up 09:54:58 - 09:59:57 3200
North Lake 09:57:25 -33.0 Dark Down 31.4 230.8 Up 09:54:55 - 09:59:54 3176
Paisley 09:57:23 -33.3 Dark Down 31.5 231.4 Up 09:54:53 - 09:59:52 3141
Chiloquin 09:57:26 -34.0 Dark Down 32.3 230.2 Up 09:54:56 - 09:59:55 3120
Lakeview 09:57:21 -33.7 Dark Down 31.7 231.9 Up 09:54:51 - 09:59:50 3107
Klamath Falls 09:57:24 -34.2 Dark Down 32.5 230.5 Up 09:54:55 - 09:59:54 3097
Dunrhomin 09:56:39 -27.4 Dark Down 23.1 245.7 Low 09:54:10 - 09:59:09 3083
Cedarville 09:57:18 -34.1 Dark Down 32.0 232.3 Up 09:54:49 - 09:59:48 3063
Fall River/Burney 09:57:20 -35.0 Dark Down 33.1 231.4 Up 09:54:51 - 09:59:50 3017
Susanville 09:57:17 -35.3 Dark Down 33.0 232.4 Up 09:54:47 - 09:59:46 2978
Gimple 09:57:16 -35.6 Dark Down 33.3 232.4 Up 09:54:47 - 09:59:46 2956
Greenville 09:57:17 -35.6 Dark Down 33.4 232.3 Up 09:54:47 - 09:59:46 2955
Quincy 09:57:16 -35.8 Dark Down 33.5 232.4 Up 09:54:47 - 09:59:46 2940
Portola 09:57:15 -35.7 Dark Down 33.3 232.9 Up 09:54:45 - 09:59:44 2936
Reno 09:57:12 -35.6 Dark Down 33.0 233.7 Up 09:54:42 - 09:59:41 2922
Carson City 09:57:11 -35.9 Dark Down 33.2 233.9 Up 09:54:42 - 09:59:41 2896
Yerington 09:57:09 -35.7 Dark Down 32.9 234.6 Up 09:54:39 - 09:59:38 2887
Gardnerville 09:57:10 -36.0 Dark Down 33.3 234.0 Up 09:54:41 - 09:59:40 2878
Hawthorne 09:57:06 -35.9 Dark Down 32.9 235.3 Up 09:54:36 - 09:59:35 2857
Tonopah 09:57:01 -35.5 Dark Down 32.2 236.8 Up 09:54:32 - 09:59:31 2835
Lee Vining 09:57:06 -36.5 Dark Down 33.5 235.1 Up 09:54:36 - 09:59:35 2811
Bishop 09:57:02 -36.7 Dark Down 33.4 236.1 Up 09:54:33 - 09:59:32 2771
Beatty 09:56:57 -36.2 Dark Down 32.6 237.8 Up 09:54:27 - 09:59:26 2750
Indian Springs 09:56:53 -35.9 Dark Down 32.0 238.9 Up 09:54:24 - 09:59:23 2734
Henderson 09:56:50 -35.9 Dark Down 31.8 239.7 Up 09:54:20 - 09:59:19 2698
Patrick 09:56:45 -35.7 Dark Down 31.4 241.0 Up 09:54:16 - 09:59:15 2658
Kingman/Dolan Springs 09:56:45 -36.0 Dark Down 31.6 241.0 Up 09:54:15 - 09:59:14 2639
Laughlin/Bullhead City 09:56:46 -36.3 Dark Down 32.0 240.5 Up 09:54:17 - 09:59:16 2633
Mohave Valley 09:56:46 -36.5 Dark Down 32.1 240.7 Up 09:54:16 - 09:59:15 2611
CPSLO 09:57:04 -39.4 Dark Down 36.1 235.2 Up 09:54:34 - 09:59:33 2588
Lake Havasu City 09:56:44 -36.7 Dark Down 32.1 241.1 Up 09:54:14 - 09:59:13 2581
Parker 09:56:43 -36.9 Dark Down 32.3 241.3 Up 09:54:13 - 09:59:12 2553
George/Scottsdale 09:56:35 -35.8 Dark Down 30.7 243.5 Up 09:54:06 - 09:59:05 2539
Wildwood 09:56:55 -39.3 Dark Down 35.3 237.8 Up 09:54:25 - 09:59:24 2511
Blythe 09:56:42 -37.4 Dark Down 32.8 241.4 Up 09:54:13 - 09:59:12 2508
Idyllwild 09:56:48 -38.6 Dark Down 34.2 239.6 Up 09:54:18 - 09:59:17 2500
Calipatria 09:56:43 -38.3 Dark Down 33.7 240.9 Up 09:54:14 - 09:59:13 2460
Yuma 09:56:40 -38.1 Dark Down 33.2 241.9 Up 09:54:10 - 09:59:09 2432

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 472651, (2021/04/09 09:59UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 18.70 145
4Gam Crv       12:15:48.1 -17:32:30  2.6 15.50 151
13 Vir         12:18:40.4 -00:47:14  5.9  1.29 165
PPM 195364     12:19:13.4 -03:19:12  8.1  1.26 163
PPM 178751     12:19:24.1 -02:13:50  9.8  0.17 163
PPM 178749     12:19:07.4 -02:02:25 10.2  0.06 164
472651         12:19:20.7 -02:03:56 10.4       164
Positions are for J2000

Event circumstances last updated at 2021/03/12 00:55:39 UT

Marc W. Buie, Southwest Research Institute

RECON