RECON: TNO occultation with 531015

Event between (531015) 12BX154 and star GA0920:03566276 with event index number of 1600109

Geocentric closest approach at 2022/02/26 11:22:34 UTC

J2000 position of star is 11:22:11.2 +02:16:01
Equinox of date position of star is 11:23:16.0 +02:09:06
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 111 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 44.6 AU from the Sun and 43.6 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 260 seconds.
The 1-sigma cross-track error in the shadow position is 5227 km.
The sky-plane scale is 31611.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 13.0 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 531015, (2022/02/26 11:23UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:33.0 +11:51:29  1.3 20.70 131
Denebola       11:50:11.3 +14:26:53  2.1 13.98 110
79 Leo         11:25:10.6 +01:17:09  6.4  0.98 110
PPM 157763     11:22:04.3 +02:18:02  7.8  0.35 111
PPM 157789     11:23:52.8 +01:53:07  9.8  0.29 110
PPM 157785     11:23:26.7 +02:08:08 10.4  0.03 111
531015         11:23:19.5 +02:08:43 14.1       110
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 3.5 sigma about the mid-time.
The median site spacing is 14.2 km RECON observability=1.0 and success probability=5.2%
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 11:22:08 -32.6 Dark Down 32.7 225.6 Up 11:07:08 - 11:37:08 -1801
Kelowna 11:22:08 -32.8 Dark Down 33.1 225.6 Up 11:07:08 - 11:37:08 -1824
Peachland 11:22:08 -33.1 Dark Down 33.3 225.4 Up 11:07:08 - 11:37:08 -1836
Summerland 11:22:07 -33.1 Dark Down 33.4 225.5 Up 11:07:07 - 11:37:07 -1842
Penticton 11:22:07 -33.1 Dark Down 33.4 225.7 Up 11:07:07 - 11:37:07 -1843
Oliver 11:22:05 -33.2 Dark Down 33.6 225.8 Up 11:07:05 - 11:37:05 -1862
Anarchist Mountain Observatory 11:22:04 -33.2 Dark Down 33.6 226.1 Up 11:07:04 - 11:37:04 -1866
Tonasket 11:22:04 -33.4 Dark Down 33.9 226.2 Up 11:07:04 - 11:37:04 -1885
Okanogan 11:22:03 -33.6 Dark Down 34.2 226.2 Up 11:07:03 - 11:37:03 -1906
Brewster 11:22:03 -33.9 Dark Down 34.5 226.1 Up 11:07:03 - 11:37:03 -1926
Manson/Chelan 11:22:03 -34.2 Dark Down 34.8 225.8 Up 11:07:03 - 11:37:03 -1945
Wenatchee 11:22:02 -34.5 Dark Down 35.2 225.9 Up 11:07:02 - 11:37:02 -1976
Victoria 11:22:12 -35.7 Dark Down 35.8 222.0 Up 11:07:12 - 11:37:12 -1985
Ellensburg 11:22:02 -34.9 Dark Down 35.6 225.8 Up 11:07:02 - 11:37:02 -2004
Pasco 11:21:56 -34.4 Dark Down 35.4 227.7 Up 11:06:56 - 11:36:56 -2014
PNWRO 11:21:55 -34.3 Dark Down 35.5 228.1 Up 11:06:55 - 11:36:55 -2023
Yakima 11:22:00 -35.1 Dark Down 35.9 226.0 Up 11:07:00 - 11:37:00 -2028
Toppenish/White Swan 11:22:00 -35.1 Dark Down 36.0 226.3 Up 11:07:00 - 11:37:00 -2037
Dunrhomin 11:21:07 -26.9 Dark Up 30.5 244.0 Up 11:06:07 - 11:36:07 -2058
Goldendale 11:21:59 -35.6 Dark Down 36.6 226.1 Up 11:06:59 - 11:36:59 -2079
The Dalles 11:21:59 -35.9 Dark Down 36.9 225.9 Up 11:06:59 - 11:36:59 -2101
Maupin 11:21:57 -36.1 Dark Down 37.2 226.2 Up 11:06:57 - 11:36:57 -2123
Redmond 11:21:55 -36.6 Dark Down 37.8 226.6 Up 11:06:55 - 11:36:55 -2180
Sisters 11:21:56 -36.8 Dark Down 38.0 226.2 Up 11:06:56 - 11:36:56 -2188
Bend 11:21:55 -36.8 Dark Down 38.1 226.6 Up 11:06:55 - 11:36:55 -2196
Oregon Observatory 11:21:55 -36.9 Dark Down 38.2 226.5 Up 11:06:55 - 11:36:55 -2210
La Pine/Gilchrist 11:21:55 -37.0 Dark Down 38.4 226.6 Up 11:06:55 - 11:36:55 -2224
North Lake 11:21:52 -36.9 Dark Down 38.4 227.5 Up 11:06:52 - 11:36:52 -2237
Paisley 11:21:50 -36.9 Dark Down 38.6 228.2 Up 11:06:50 - 11:36:50 -2263
Lakeview 11:21:47 -37.0 Dark Down 38.8 228.7 Up 11:06:47 - 11:36:47 -2290
Klamath Falls 11:21:51 -37.9 Dark Down 39.6 227.1 Up 11:06:51 - 11:36:51 -2324
Cedarville 11:21:45 -37.1 Dark Down 39.1 229.2 Up 11:06:45 - 11:36:45 -2328
Fall River/Burney 11:21:47 -38.2 Dark Down 40.2 228.2 Up 11:06:47 - 11:36:47 -2391
Susanville 11:21:43 -37.9 Dark Down 40.2 229.4 Up 11:06:43 - 11:36:43 -2414
Gimple 11:21:43 -38.2 Dark Down 40.5 229.4 Up 11:06:43 - 11:36:43 -2438
Greenville 11:21:43 -38.3 Dark Down 40.5 229.3 Up 11:06:43 - 11:36:43 -2440
Portola 11:21:41 -38.1 Dark Down 40.4 230.0 Up 11:06:41 - 11:36:41 -2450
Reno 11:21:38 -37.7 Dark Down 40.2 230.9 Up 11:06:38 - 11:36:38 -2451
Quincy 11:21:42 -38.3 Dark Down 40.6 229.4 Up 11:06:42 - 11:36:42 -2454
Yerington 11:21:36 -37.5 Dark Down 40.2 231.9 Up 11:06:36 - 11:36:36 -2472
Carson City 11:21:38 -37.8 Dark Down 40.4 231.1 Up 11:06:38 - 11:36:38 -2475
Tonopah 11:21:27 -36.4 Dark Down 39.5 234.5 Up 11:06:27 - 11:36:27 -2485
Hawthorne 11:21:32 -37.3 Dark Down 40.2 232.7 Up 11:06:32 - 11:36:32 -2490
Gardnerville 11:21:36 -37.9 Dark Down 40.6 231.3 Up 11:06:36 - 11:36:36 -2490
Lee Vining 11:21:32 -37.8 Dark Down 40.8 232.6 Up 11:06:32 - 11:36:32 -2541
Indian Springs 11:21:19 -35.8 Dark Down 39.4 236.9 Up 11:06:19 - 11:36:19 -2549
Beatty 11:21:23 -36.5 Dark Down 39.9 235.7 Up 11:06:23 - 11:36:23 -2554
Bishop 11:21:28 -37.5 Dark Down 40.7 233.7 Up 11:06:28 - 11:36:28 -2564
Henderson 11:21:16 -35.4 Dark Down 39.2 237.9 Up 11:06:16 - 11:36:16 -2569
Patrick 11:21:11 -34.7 Dark Down 38.8 239.4 Up 11:06:11 - 11:36:11 -2585
Kingman/Dolan Springs 11:21:11 -34.9 Dark Down 39.0 239.4 Up 11:06:11 - 11:36:11 -2606
Laughlin/Bullhead City 11:21:12 -35.3 Dark Down 39.4 238.9 Up 11:06:12 - 11:36:12 -2621
Mohave Valley 11:21:12 -35.4 Dark Down 39.5 239.1 Up 11:06:12 - 11:36:12 -2641
George/Scottsdale 11:21:01 -33.6 Dark Up 38.2 242.3 Up 11:06:01 - 11:36:01 -2656
Lake Havasu City 11:21:09 -35.3 Dark Down 39.6 239.6 Up 11:06:09 - 11:36:09 -2663
Parker 11:21:08 -35.4 Dark Down 39.7 239.9 Up 11:06:08 - 11:36:08 -2688
Blythe 11:21:08 -35.8 Dark Up 40.2 240.0 Up 11:06:08 - 11:36:08 -2735
CPSLO 11:21:29 -40.0 Dark Down 43.4 232.9 Up 11:06:29 - 11:36:29 -2775
Idyllwild 11:21:14 -37.4 Dark Down 41.7 238.0 Up 11:06:14 - 11:36:14 -2782
Calipatria 11:21:09 -36.6 Dark Down 41.1 239.5 Up 11:06:09 - 11:36:09 -2797
Yuma 11:21:05 -36.0 Dark Up 40.7 240.6 Up 11:06:05 - 11:36:05 -2805
Wildwood 11:21:20 -38.8 Dark Down 42.8 235.9 Up 11:06:20 - 11:36:20 -2808

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 531015, (2022/02/26 11:23UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 20.70 131
Denebola       11:49:02.9 +14:34:17  2.1 13.98 110
79 Leo         11:24:02.3 +01:24:28  6.4  0.98 110
PPM 157763     11:20:55.9 +02:25:20  7.8  0.35 111
PPM 157789     11:22:44.5 +02:00:26  9.8  0.29 110
PPM 157785     11:22:18.4 +02:15:27 10.4  0.03 111
531015         11:22:11.2 +02:16:01 14.1       111
Positions are for J2000

Event circumstances last updated at 2020/12/31 21:30:06 UT

Marc W. Buie, Southwest Research Institute

RECON