RECON: TNO occultation with 535230

Event between (535230) 14YH50 and star GA1300:04081878 with event index number of 2259255

Geocentric closest approach at 2023/01/18 06:37:07 UTC

J2000 position of star is 10:18:16.7 +41:14:21
Equinox of date position of star is 10:19:36.0 +41:07:39
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 40.1 AU from the Sun and 39.3 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 116 seconds.
The 1-sigma cross-track error in the shadow position is 2888 km.
The sky-plane scale is 28508.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=338.9 km assuming a 5% albedo -- 13.7 sec chord
Diameter=138.3 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 535230, (2023/01/18 06:35UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:35.8 +11:51:13  1.3 29.35  98
Merak          11:03:13.0 +56:15:30  2.4 16.71 104
PPM 051848     10:23:32.3 +41:06:42  6.3  0.73 105
PPM 051797     10:18:40.0 +41:21:05  7.9  0.29 106
535230         10:19:39.1 +41:07:23 16.4       106
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 30.5 km RECON observability=1.0 and success probability=17.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:39:18 -57.8 Dark Down 58.9 93.0 Up 06:29:06 - 06:49:29 -1456
Kamloops 06:39:50 -54.9 Dark Down 50.0 80.5 Up 06:29:38 - 06:50:01 -1683
Kelowna 06:39:47 -55.9 Dark Down 50.4 80.2 Up 06:29:36 - 06:49:59 -1775
Peachland 06:39:48 -55.9 Dark Down 50.2 79.8 Up 06:29:37 - 06:50:00 -1787
Summerland 06:39:47 -56.0 Dark Down 50.2 79.7 Up 06:29:36 - 06:49:59 -1803
Penticton 06:39:48 -56.1 Dark Down 50.3 79.7 Up 06:29:36 - 06:49:59 -1811
Oliver 06:39:47 -56.4 Dark Down 50.2 79.3 Up 06:29:36 - 06:49:59 -1849
Anarchist Mountain Observatory 06:39:47 -56.6 Dark Down 50.3 79.2 Up 06:29:36 - 06:49:59 -1869
Tonasket 06:39:47 -56.8 Dark Down 50.2 78.8 Up 06:29:36 - 06:49:59 -1902
Victoria 06:39:56 -55.2 Dark Down 47.6 76.3 Up 06:29:45 - 06:50:08 -1909
Okanogan 06:39:48 -57.0 Dark Down 50.0 78.3 Up 06:29:36 - 06:49:59 -1939
Brewster 06:39:48 -57.1 Dark Down 49.8 77.9 Up 06:29:36 - 06:49:59 -1969
Manson/Chelan 06:39:49 -57.1 Dark Down 49.6 77.4 Up 06:29:37 - 06:50:00 -1991
Wenatchee 06:39:49 -57.4 Dark Down 49.3 76.8 Up 06:29:37 - 06:50:00 -2043
Ellensburg 06:39:49 -57.6 Dark Down 49.1 76.2 Up 06:29:38 - 06:50:01 -2087
Yakima 06:39:48 -57.9 Dark Down 49.0 75.7 Up 06:29:37 - 06:50:00 -2132
Toppenish/White Swan 06:39:49 -58.1 Dark Down 49.0 75.6 Up 06:29:37 - 06:50:00 -2156
PNWRO 06:39:45 -59.1 Dark Down 50.0 76.0 Up 06:29:33 - 06:49:56 -2198
Goldendale 06:39:49 -58.3 Dark Down 48.6 74.8 Up 06:29:38 - 06:50:01 -2215
The Dalles 06:39:50 -58.3 Dark Down 48.3 74.3 Up 06:29:38 - 06:50:01 -2238
Maupin 06:39:50 -58.6 Dark Down 48.3 73.9 Up 06:29:38 - 06:50:01 -2284
Sisters 06:39:50 -59.0 Dark Down 47.7 72.8 Up 06:29:39 - 06:50:02 -2378
Bend 06:39:49 -59.3 Dark Down 47.8 72.6 Up 06:29:38 - 06:50:01 -2405
Oregon Observatory 06:39:50 -59.3 Dark Down 47.6 72.4 Up 06:29:38 - 06:50:01 -2423
North Lake 06:39:48 -60.0 Dark Down 47.8 72.0 Up 06:29:37 - 06:50:00 -2494
Chiloquin 06:39:50 -59.9 Dark Down 46.9 70.9 Up 06:29:39 - 06:50:02 -2563
Klamath Falls 06:39:50 -60.2 Dark Down 46.9 70.5 Up 06:29:38 - 06:50:01 -2600
Lakeview 06:39:46 -61.0 Dark Down 47.9 71.1 Up 06:29:35 - 06:49:58 -2609
Cedarville 06:39:45 -61.5 Dark Down 47.8 70.5 Up 06:29:34 - 06:49:57 -2680
Dunrhomin 06:39:03 -69.2 Dark Down 58.1 74.1 Up 06:28:52 - 06:49:15 -2716
Fall River/Burney 06:39:48 -61.1 Dark Down 46.7 69.5 Up 06:29:36 - 06:49:59 -2728
CU-SBO 06:39:04 -69.4 Dark Down 57.9 73.7 Up 06:28:52 - 06:49:15 -2744
Susanville 06:39:46 -62.0 Dark Down 47.0 69.1 Up 06:29:34 - 06:49:57 -2798
Greenville 06:39:46 -62.0 Dark Down 46.7 68.8 Up 06:29:35 - 06:49:58 -2826
Gimple 06:39:46 -62.0 Dark Down 46.8 68.8 Up 06:29:35 - 06:49:58 -2826
Quincy 06:39:46 -62.1 Dark Down 46.7 68.6 Up 06:29:35 - 06:49:58 -2847
Portola 06:39:45 -62.5 Dark Down 47.0 68.6 Up 06:29:34 - 06:49:57 -2862
Reno 06:39:43 -63.0 Dark Down 47.3 68.6 Up 06:29:32 - 06:49:55 -2892
Carson City 06:39:43 -63.2 Dark Down 47.2 68.2 Up 06:29:31 - 06:49:54 -2930
Yerington 06:39:41 -63.7 Dark Down 47.6 68.2 Up 06:29:29 - 06:49:52 -2952
Gardnerville 06:39:42 -63.4 Dark Down 47.1 68.0 Up 06:29:31 - 06:49:54 -2956
Hawthorne 06:39:39 -64.4 Dark Down 47.8 67.9 Up 06:29:28 - 06:49:51 -3001
Tonopah 06:39:35 -65.5 Dark Down 48.6 67.8 Up 06:29:23 - 06:49:46 -3050
Lee Vining 06:39:40 -64.4 Dark Down 47.2 67.2 Up 06:29:28 - 06:49:51 -3060
Bishop 06:39:37 -65.2 Dark Down 47.5 66.8 Up 06:29:26 - 06:49:49 -3123
Beatty 06:39:32 -66.5 Dark Down 48.5 66.7 Up 06:29:21 - 06:49:44 -3170
Indian Springs 06:39:29 -67.4 Dark Down 49.2 66.6 Up 06:29:17 - 06:49:40 -3201
Henderson 06:39:26 -68.1 Dark Down 49.5 66.2 Up 06:29:15 - 06:49:38 -3254
Patrick 06:39:22 -69.2 Dark Down 50.0 65.7 Up 06:29:11 - 06:49:34 -3313
Kingman/Dolan Springs 06:39:23 -69.3 Dark Down 49.8 65.5 Up 06:29:11 - 06:49:34 -3338
Laughlin/Bullhead City 06:39:24 -68.9 Dark Down 49.4 65.3 Up 06:29:13 - 06:49:36 -3342
Mohave Valley 06:39:24 -69.1 Dark Down 49.3 65.1 Up 06:29:12 - 06:49:35 -3370
Lake Havasu City 06:39:23 -69.5 Dark Down 49.3 64.7 Up 06:29:11 - 06:49:34 -3410
Parker 06:39:22 -69.8 Dark Down 49.2 64.3 Up 06:29:10 - 06:49:33 -3445
Wildwood 06:39:35 -66.9 Dark Down 46.0 63.6 Up 06:29:23 - 06:49:46 -3460
George/Scottsdale 06:39:13 -71.6 Dark Down 50.8 64.2 Up 06:29:02 - 06:49:25 -3473
Idyllwild 06:39:28 -68.4 Dark Down 47.2 63.5 Up 06:29:17 - 06:49:40 -3496
Calipatria 06:39:25 -69.5 Dark Down 47.8 63.1 Up 06:29:13 - 06:49:36 -3554
Yuma 06:39:21 -70.4 Dark Down 48.3 62.8 Up 06:29:10 - 06:49:33 -3594

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 535230, (2023/01/18 06:35UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 29.35  98
Merak          11:01:50.7 +56:22:57  2.4 16.71 104
PPM 051848     10:22:10.3 +41:13:43  6.3  0.73 105
PPM 051797     10:17:17.5 +41:28:02  7.9  0.29 106
535230         10:18:16.7 +41:14:21 16.4       106
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:50:52 UT

Marc W. Buie, Southwest Research Institute

RECON