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 11:23:11.3 +02:09:36
Stellar brightness G=14.1, use SENSEUP=64
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 5226 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       11:50:11.4 +14:26:54  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 +01:53:08  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 11.1 km RECON observability=1.0 and success probability=5.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:22:07 -32.8 Dark Down 33.0 225.7 Up 11:07:07 - 11:37:07 -1821
Summerland 11:22:07 -33.1 Dark Down 33.4 225.5 Up 11:07:07 - 11:37:07 -1843
Penticton 11:22:07 -33.1 Dark Down 33.4 225.7 Up 11:07:07 - 11:37:07 -1844
Okanagan Falls 11:22:06 -33.2 Dark Down 33.5 225.7 Up 11:07:06 - 11:37:06 -1854
Oliver 11:22:06 -33.2 Dark Down 33.6 225.8 Up 11:07:06 - 11:37:06 -1862
Anarchist Mountain Observatory 11:22:05 -33.2 Dark Down 33.6 226.1 Up 11:07:05 - 11:37:05 -1867
Oroville 11:22:04 -33.3 Dark Down 33.7 226.1 Up 11:07:04 - 11:37:04 -1873
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 -1907
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 -1946
Wenatchee 11:22:03 -34.5 Dark Down 35.2 225.9 Up 11:07:03 - 11:37:03 -1976
Ellensburg 11:22:01 -34.9 Dark Down 35.6 225.8 Up 11:07:01 - 11:37:01 -2005
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 11:21:59 -35.1 Dark Down 36.0 226.3 Up 11:06:59 - 11:36:59 -2037
George/Umatilla 11:21:56 -34.7 Dark Down 35.8 227.7 Up 11:06:56 - 11:36:56 -2039
SwRI 11:21:05 -27.0 Dark Up 30.6 244.1 Up 11:06:05 - 11:36:05 -2077
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 11:21:58 -36.1 Dark Down 37.2 226.2 Up 11:06:58 - 11:36:58 -2124
Madras/Culver 11:21:56 -36.4 Dark Down 37.6 226.5 Up 11:06:56 - 11:36:56 -2158
Redmond 11:21:55 -36.6 Dark Down 37.8 226.6 Up 11:06:55 - 11:36:55 -2181
Sisters 11:21:56 -36.8 Dark Down 38.0 226.2 Up 11:06:56 - 11:36:56 -2189
Bend 11:21:55 -36.7 Dark Down 38.1 226.6 Up 11:06:55 - 11:36:55 -2197
Oregon Observatory 11:21:55 -36.9 Dark Down 38.2 226.5 Up 11:06:55 - 11:36:55 -2211
La Pine/Gilchrist 11:21:55 -37.0 Dark Down 38.4 226.6 Up 11:06:55 - 11:36:55 -2226
North Lake 11:21:52 -36.9 Dark Down 38.4 227.5 Up 11:06:52 - 11:36:52 -2238
Paisley 11:21:49 -36.9 Dark Down 38.6 228.2 Up 11:06:49 - 11:36:49 -2264
Lakeview 11:21:47 -37.0 Dark Down 38.8 228.7 Up 11:06:47 - 11:36:47 -2291
Chiloquin 11:21:52 -37.8 Dark Down 39.4 226.8 Up 11:06:52 - 11:36:52 -2305
Klamath Falls 11:21:51 -37.9 Dark Down 39.6 227.1 Up 11:06:51 - 11:36:51 -2325
Cedarville 11:21:45 -37.1 Dark Down 39.1 229.2 Up 11:06:45 - 11:36:45 -2329
Tulelake 11:21:49 -37.8 Dark Down 39.6 227.6 Up 11:06:49 - 11:36:49 -2335
Fall River/Burney 11:21:47 -38.2 Dark Down 40.2 228.2 Up 11:06:47 - 11:36:47 -2392
Susanville 11:21:43 -37.9 Dark Down 40.2 229.4 Up 11:06:43 - 11:36:43 -2415
Gimple 11:21:43 -38.2 Dark Down 40.5 229.4 Up 11:06:43 - 11:36:43 -2439
Greenville 11:21:43 -38.3 Dark Down 40.5 229.3 Up 11:06:43 - 11:36:43 -2441
Portola 11:21:41 -38.1 Dark Down 40.4 230.0 Up 11:06:41 - 11:36:41 -2451
Reno 11:21:38 -37.7 Dark Down 40.2 230.9 Up 11:06:38 - 11:36:38 -2452
Quincy 11:21:43 -38.3 Dark Down 40.6 229.4 Up 11:06:43 - 11:36:43 -2455
Yerington 11:21:36 -37.5 Dark Down 40.2 231.9 Up 11:06:36 - 11:36:36 -2473
Carson City 11:21:38 -37.8 Dark Down 40.4 231.1 Up 11:06:38 - 11:36:38 -2476
Tonopah 11:21:27 -36.4 Dark Down 39.5 234.5 Up 11:06:27 - 11:36:27 -2486
Hawthorne 11:21:32 -37.3 Dark Down 40.2 232.7 Up 11:06:32 - 11:36:32 -2491
Gardnerville 11:21:36 -37.9 Dark Down 40.6 231.3 Up 11:06:36 - 11:36:36 -2491
Lee Vining 11:21:32 -37.8 Dark Down 40.8 232.6 Up 11:06:32 - 11:36:32 -2543
Indian Springs 11:21:19 -35.8 Dark Down 39.4 236.9 Up 11:06:19 - 11:36:19 -2550
Beatty 11:21:23 -36.5 Dark Down 39.9 235.7 Up 11:06:23 - 11:36:23 -2555
Bishop 11:21:28 -37.5 Dark Down 40.7 233.7 Up 11:06:28 - 11:36:28 -2565
Henderson 11:21:17 -35.4 Dark Down 39.2 237.9 Up 11:06:17 - 11:36:17 -2570
Patrick 11:21:11 -34.7 Dark Down 38.8 239.4 Up 11:06:11 - 11:36:11 -2586
Kingman/Dolan Springs 11:21:11 -34.9 Dark Down 39.0 239.4 Up 11:06:11 - 11:36:11 -2606
Searchlight/Boulder City 11:21:14 -35.5 Dark Down 39.5 238.4 Up 11:06:14 - 11:36:14 -2609
Lone Pine 11:21:26 -37.5 Dark Down 40.9 234.6 Up 11:06:26 - 11:36:26 -2610
Laughlin/Bullhead City 11:21:12 -35.3 Dark Down 39.4 238.9 Up 11:06:12 - 11:36:12 -2621
Mohave Valley 11:21:11 -35.4 Dark Down 39.5 239.1 Up 11:06:11 - 11:36:11 -2641
Lake Havasu City 11:21:10 -35.3 Dark Down 39.6 239.6 Up 11:06:10 - 11:36:10 -2663
Parker 11:21:08 -35.4 Dark Down 39.7 239.9 Up 11:06:08 - 11:36:08 -2689
Blythe 11:21:07 -35.8 Dark Up 40.2 240.0 Up 11:06:07 - 11:36:07 -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 -2783
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 2019/07/03 22:09:23 UT

Marc W. Buie, Southwest Research Institute

RECON