RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1020:18259718 with event index number of 2090132

Geocentric closest approach at 2027/09/09 07:39:56 UTC

J2000 position of star is 20:35:19.0 +12:28:13
Equinox of date position of star is 20:36:22.6 +12:32:55
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 52 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 29.7 AU from the Sun and 28.9 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 143 seconds.
The 1-sigma cross-track error in the shadow position is 3743 km.
The sky-plane scale is 20984.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.4 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2027/09/09 07:40UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:22.6 +45:22:50  1.3 32.84  79
Tarazed        19:47:34.5 +10:40:57  2.7 12.16  43
3Eta Del       20:35:15.6 +13:07:25  5.5  0.65  52
PPM 138706     20:38:18.0 +12:08:47  8.1  0.59  51
PPM 138647     20:36:35.3 +12:37:01  9.3  0.05  52
523700         20:36:37.8 +12:34:02 16.0        52
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 27.1 km RECON observability=1.0 and success probability=13.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 07:36:53 -33.8 Dark Down 43.2 227.2 Up 07:24:30 - 07:49:16 3605
Victoria 07:37:03 -35.6 Dark Down 46.1 225.1 Up 07:24:40 - 07:49:26 3527
Peachland 07:36:54 -34.7 Dark Down 43.6 228.5 Up 07:24:31 - 07:49:17 3497
Kelowna 07:36:54 -34.6 Dark Down 43.4 228.8 Up 07:24:31 - 07:49:17 3496
Summerland 07:36:54 -34.9 Dark Down 43.6 228.7 Up 07:24:31 - 07:49:17 3480
Penticton 07:36:54 -35.0 Dark Down 43.6 228.9 Up 07:24:31 - 07:49:17 3469
Oliver 07:36:54 -35.3 Dark Down 43.8 229.2 Up 07:24:31 - 07:49:17 3436
Anarchist Mountain Observatory 07:36:53 -35.5 Dark Down 43.9 229.5 Up 07:24:30 - 07:49:16 3413
Tonasket 07:36:55 -35.8 Dark Down 44.1 229.7 Up 07:24:32 - 07:49:18 3387
Okanogan 07:36:56 -36.1 Dark Down 44.4 229.7 Up 07:24:33 - 07:49:19 3361
Brewster 07:36:57 -36.4 Dark Down 44.7 229.7 Up 07:24:34 - 07:49:20 3344
Manson/Chelan 07:36:57 -36.6 Dark Down 45.0 229.4 Up 07:24:34 - 07:49:20 3339
Wenatchee 07:36:59 -37.0 Dark Down 45.4 229.6 Up 07:24:36 - 07:49:22 3301
Sleaford 07:36:26 -32.1 Dark Down 35.2 241.7 Up 07:24:03 - 07:48:49 3282
Ellensburg 07:36:58 -37.4 Dark Down 45.8 229.7 Up 07:24:35 - 07:49:21 3271
Yakima 07:37:00 -37.8 Dark Down 46.0 230.0 Up 07:24:37 - 07:49:23 3234
Toppenish/White Swan 07:37:00 -38.0 Dark Down 46.1 230.3 Up 07:24:37 - 07:49:23 3207
Goldendale 07:37:01 -38.5 Dark Down 46.7 230.3 Up 07:24:38 - 07:49:24 3173
The Dalles 07:37:02 -38.7 Dark Down 47.0 230.0 Up 07:24:39 - 07:49:25 3167
Maupin 07:37:03 -39.2 Dark Down 47.2 230.5 Up 07:24:40 - 07:49:26 3124
PNWRO 07:36:57 -38.5 Dark Down 45.5 232.4 Up 07:24:34 - 07:49:20 3112
Sisters 07:37:04 -40.0 Dark Down 48.0 230.7 Up 07:24:41 - 07:49:27 3063
Bend 07:37:05 -40.2 Dark Down 48.0 231.2 Up 07:24:42 - 07:49:28 3029
Oregon Observatory 07:37:06 -40.4 Dark Down 48.2 231.2 Up 07:24:43 - 07:49:29 3019
North Lake 07:37:04 -41.1 Dark Down 48.3 232.4 Up 07:24:41 - 07:49:27 2936
Chiloquin 07:37:09 -41.7 Dark Down 49.3 231.9 Up 07:24:46 - 07:49:32 2914
Klamath Falls 07:37:09 -42.0 Dark Down 49.4 232.3 Up 07:24:46 - 07:49:32 2879
Lakeview 07:37:05 -42.2 Dark Down 48.6 234.0 Up 07:24:42 - 07:49:28 2812
Fall River/Burney 07:37:10 -43.2 Dark Down 49.9 233.9 Up 07:24:47 - 07:49:33 2751
Cedarville 07:37:06 -42.9 Dark Down 48.9 234.8 Up 07:24:43 - 07:49:29 2743
Susanville 07:37:09 -43.9 Dark Down 49.8 235.4 Up 07:24:46 - 07:49:32 2659
Greenville 07:37:11 -44.2 Dark Down 50.1 235.3 Up 07:24:48 - 07:49:34 2646
Gimple 07:37:11 -44.2 Dark Down 50.1 235.4 Up 07:24:48 - 07:49:34 2642
Quincy 07:37:11 -44.4 Dark Down 50.3 235.5 Up 07:24:48 - 07:49:34 2627
Portola 07:37:10 -44.5 Dark Down 50.0 236.2 Up 07:24:47 - 07:49:33 2593
Reno 07:37:10 -44.9 Dark Down 49.8 237.2 Up 07:24:47 - 07:49:33 2539
Carson City 07:37:09 -45.2 Dark Down 49.9 237.6 Up 07:24:46 - 07:49:32 2504
Gardnerville 07:37:10 -45.5 Dark Down 50.0 237.9 Up 07:24:47 - 07:49:33 2479
Yerington 07:37:09 -45.5 Dark Down 49.6 238.5 Up 07:24:46 - 07:49:32 2457
Hawthorne 07:37:08 -46.0 Dark Down 49.5 239.5 Up 07:24:45 - 07:49:31 2389
Lee Vining 07:37:10 -46.5 Dark Down 50.1 239.6 Up 07:24:47 - 07:49:33 2357
Tonopah 07:37:06 -46.5 Dark Down 48.8 241.5 Up 07:24:43 - 07:49:29 2282
Bishop 07:37:10 -47.2 Dark Down 49.9 241.0 Up 07:24:47 - 07:49:33 2267
Beatty 07:37:07 -47.7 Dark Down 49.0 243.1 Up 07:24:44 - 07:49:30 2150
Indian Springs 07:37:05 -48.1 Dark Down 48.4 244.5 Up 07:24:42 - 07:49:28 2072
Dunrhomin 07:36:36 -43.5 Dark Down 39.4 250.7 Up 07:24:13 - 07:48:59 2046
CU-SBO 07:36:37 -43.8 Dark Down 39.6 250.8 Up 07:24:14 - 07:49:00 2023
Henderson 07:37:04 -48.6 Dark Down 48.1 245.7 Up 07:24:41 - 07:49:27 1990
Wildwood 07:37:16 -50.4 Dark Up 51.6 244.3 Up 07:24:53 - 07:49:39 1965
Laughlin/Bullhead City 07:37:05 -49.5 Dark Down 48.1 247.0 Up 07:24:42 - 07:49:28 1887
Patrick 07:37:03 -49.2 Dark Down 47.5 247.4 Up 07:24:40 - 07:49:26 1881
Kingman/Dolan Springs 07:37:04 -49.4 Dark Down 47.7 247.5 Up 07:24:41 - 07:49:27 1867
Mohave Valley 07:37:04 -49.7 Dark Down 48.2 247.3 Up 07:24:41 - 07:49:27 1861
Idyllwild 07:37:13 -50.9 Dark Down 50.3 246.6 Up 07:24:50 - 07:49:36 1843
Lake Havasu City 07:37:05 -50.1 Dark Down 48.2 248.0 Up 07:24:42 - 07:49:28 1811
Parker 07:37:06 -50.5 Dark Down 48.3 248.3 Up 07:24:43 - 07:49:29 1775
Calipatria 07:37:11 -51.5 Dark Down 49.6 248.3 Up 07:24:48 - 07:49:34 1731
Yuma 07:37:09 -51.9 Dark Down 49.1 249.6 Up 07:24:46 - 07:49:32 1649
George/Scottsdale 07:37:00 -50.8 Dark Down 46.6 250.9 Up 07:24:37 - 07:49:23 1631

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 523700, (2027/09/09 07:40UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 32.84  79
Tarazed        19:46:15.6 +10:36:48  2.7 12.16  43
3Eta Del       20:33:57.1 +13:01:38  5.5  0.65  52
PPM 138706     20:36:58.9 +12:02:55  8.1  0.59  51
PPM 138647     20:35:16.6 +12:31:12  9.3  0.05  52
523700         20:35:19.0 +12:28:13 16.0        52
Positions are for J2000

Event circumstances last updated at 2022/05/11 22:20:45 UT

Marc W. Buie, Southwest Research Institute

RECON