RECON: TNO occultation with 523642

Event between (523642) 10SS43 and star GA1320:00541236 with event index number of 2382974

Geocentric closest approach at 2027/07/20 09:45:03 UTC

J2000 position of star is 01:47:03.6 +43:32:19
Equinox of date position of star is 01:48:24.2 +43:38:53
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 86 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 37.7 AU from the Sun and 37.9 AU from the Earth.
The TNO is moving 19.9 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 165 seconds.
The 1-sigma cross-track error in the shadow position is 3666 km.
The sky-plane scale is 27494.8 km/arcsec.

The TNO has an absolute magnitude Hv=5.8
Diameter=424.6 km assuming a 5% albedo -- 21.3 sec chord
Diameter=173.4 km assuming a 30% albedo -- 8.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523642, (2027/07/20 09:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:30.3 +16:33:46  0.8 44.73 113
57Gam1And      02:05:36.2 +42:27:38  2.3  3.31  88
PPM 044298     01:42:19.4 +43:26:10  5.8  1.19  84
PPM 044402     01:47:59.8 +43:50:33  7.2  0.21  85
PPM 044407     01:48:12.7 +43:43:11  9.5  0.10  85
523642         01:48:44.3 +43:40:31 15.7        86
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 7.8 km RECON observability=1.0 and success probability=7.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Wildwood 09:44:49 -29.9 Dark Up 42.5 59.5 Up 09:30:34 - 09:59:04 -172
Idyllwild 09:44:43 -29.5 Dark Up 43.6 59.5 Up 09:30:28 - 09:58:58 -266
Quincy 09:45:22 -25.5 Dark Up 43.7 63.7 Up 09:31:07 - 09:59:37 -275
Greenville 09:45:23 -25.3 Dark Up 43.8 63.9 Up 09:31:08 - 09:59:38 -284
Lee Vining 09:45:09 -26.6 Dark Up 44.0 62.6 Up 09:30:54 - 09:59:24 -285
Gimple 09:45:23 -25.3 Dark Up 43.8 63.9 Up 09:31:08 - 09:59:38 -288
Gardnerville 09:45:15 -26.0 Dark Up 44.1 63.2 Up 09:31:00 - 09:59:30 -292
Portola 09:45:21 -25.4 Dark Up 44.0 63.8 Up 09:31:06 - 09:59:36 -293
Carson City 09:45:16 -25.8 Dark Up 44.1 63.4 Up 09:31:01 - 09:59:31 -300
Bishop 09:45:04 -26.9 Dark Up 44.3 62.2 Up 09:30:49 - 09:59:19 -300
Fall River/Burney 09:45:28 -24.6 Dark Up 43.9 64.5 Up 09:31:13 - 09:59:43 -303
Susanville 09:45:24 -24.9 Dark Up 44.1 64.2 Up 09:31:09 - 09:59:39 -310
Reno 09:45:18 -25.5 Dark Up 44.3 63.7 Up 09:31:03 - 09:59:33 -314
Calipatria 09:44:38 -29.5 Dark Up 44.1 59.1 Up 09:30:23 - 09:58:53 -318
Yerington 09:45:14 -25.7 Dark Up 44.5 63.4 Up 09:30:59 - 09:59:29 -325
Hawthorne 09:45:11 -26.0 Dark Up 44.6 63.2 Up 09:30:56 - 09:59:26 -333
Klamath Falls 09:45:35 -23.6 Dark Up 44.2 65.5 Up 09:31:20 - 09:59:50 -340
Chiloquin 09:45:37 -23.3 Dark Up 44.2 65.7 Up 09:31:22 - 09:59:52 -352
Yuma 09:44:34 -29.5 Dark Up 44.6 58.9 Up 09:30:19 - 09:58:49 -359
Beatty 09:44:59 -26.7 Dark Up 45.2 62.2 Up 09:30:44 - 09:59:14 -373
Cedarville 09:45:28 -23.8 Dark Up 44.9 65.4 Up 09:31:13 - 09:59:43 -383
Tonopah 09:45:05 -25.9 Dark Up 45.4 63.1 Up 09:30:50 - 09:59:20 -390
Lakeview 09:45:32 -23.2 Dark Up 45.1 65.9 Up 09:31:17 - 09:59:47 -405
Indian Springs 09:44:55 -26.6 Dark Up 45.8 62.1 Up 09:30:40 - 09:59:10 -422
Parker 09:44:40 -28.1 Dark Up 45.6 60.2 Up 09:30:25 - 09:58:55 -423
North Lake 09:45:38 -22.4 Dark Up 45.2 66.7 Up 09:31:23 - 09:59:53 -429
Mohave Valley 09:44:44 -27.6 Dark Up 45.7 60.8 Up 09:30:29 - 09:58:59 -431
Lake Havasu City 09:44:42 -27.8 Dark Up 45.7 60.5 Up 09:30:27 - 09:58:57 -433
Oregon Observatory 09:45:42 -22.0 Dark Up 45.1 67.1 Up 09:31:27 - 09:59:57 -435
Laughlin/Bullhead City 09:44:46 -27.3 Dark Up 45.9 61.1 Up 09:30:31 - 09:59:01 -439
Henderson 09:44:51 -26.7 Dark Up 46.0 61.8 Up 09:30:36 - 09:59:06 -444
Bend 09:45:43 -21.8 Dark Up 45.2 67.3 Up 09:31:28 - 09:59:58 -450
Sisters 09:45:44 -21.6 Dark Up 45.1 67.4 Up 09:31:29 - 09:59:59 -450
Kingman/Dolan Springs 09:44:45 -27.1 Dark Up 46.3 61.2 Up 09:30:30 - 09:59:00 -470
Patrick 09:44:45 -26.8 Dark Up 46.5 61.4 Up 09:30:30 - 09:59:00 -489
Maupin 09:45:47 -20.7 Dark Up 45.8 68.5 Up 09:31:32 - 10:00:02 -517
The Dalles 09:45:49 -20.3 Dark Up 45.9 68.8 Up 09:31:34 - 10:00:04 -533
Goldendale 09:45:50 -20.0 Dark Up 46.2 69.2 Up 09:31:35 - 10:00:05 -561
George/Scottsdale 09:44:33 -27.3 Dark Up 47.1 60.1 Up 09:30:18 - 09:58:48 -562
Victoria 09:46:07 -18.2 Dark Up 45.5 70.6 Up 09:31:52 - 10:00:22 -598
Toppenish/White Swan 09:45:52 -19.4 Dark Up 46.7 70.0 Up 09:31:37 - 10:00:07 -609
Yakima 09:45:53 -19.2 Dark Up 46.7 70.1 Up 09:31:38 - 10:00:08 -612
Ellensburg 09:45:55 -18.9 Dark Up 46.8 70.5 Up 09:31:40 - 10:00:10 -634
PNWRO 09:45:47 -19.3 Dark Up 47.5 70.3 Up 09:31:32 - 10:00:02 -658
Wenatchee 09:45:56 -18.4 Dark Up 47.1 71.1 Up 09:31:41 - 10:00:11 -666
Manson/Chelan 09:45:58 -17.9 AT Up 47.4 71.6 Up 09:31:43 - 10:00:13 -698
Brewster 09:45:59 -17.7 AT Up 47.7 72.0 Up 09:31:44 - 10:00:14 -726
Okanogan 09:46:00 -17.4 AT Up 47.9 72.4 Up 09:31:45 - 10:00:15 -749
Tonasket 09:46:01 -17.0 AT Up 48.1 72.9 Up 09:31:46 - 10:00:16 -774
Anarchist Mountain Observatory 09:46:02 -16.7 AT Up 48.2 73.2 Up 09:31:47 - 10:00:17 -793
Oliver 09:46:03 -16.6 AT Up 48.1 73.3 Up 09:31:48 - 10:00:18 -794
Summerland 09:46:05 -16.2 AT Up 48.2 73.7 Up 09:31:50 - 10:00:20 -812
Penticton 09:46:05 -16.3 AT Up 48.2 73.7 Up 09:31:50 - 10:00:20 -814
Peachland 09:46:06 -16.1 AT Up 48.2 73.8 Up 09:31:51 - 10:00:21 -817
Kelowna 09:46:06 -16.0 AT Up 48.4 74.1 Up 09:31:51 - 10:00:21 -836
Kamloops 09:46:12 -15.4 AT Up 48.1 74.5 Up 09:31:57 - 10:00:27 -843
Dunrhomin 09:44:55 -18.9 Dark Up 54.8 68.6 Up 09:30:40 - 09:59:10 -1190
Sleaford 09:45:57 -9.7 NT Up 57.1 85.5 Up 09:31:42 - 10:00:12 -1593

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 523642, (2027/07/20 09:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 44.73 113
57Gam1And      02:03:54.1 +42:19:46  2.3  3.31  88
PPM 044298     01:40:39.8 +43:17:51  5.8  1.19  84
PPM 044402     01:46:19.2 +43:42:20  7.2  0.21  85
PPM 044407     01:46:32.2 +43:34:58  9.5  0.10  85
523642         01:47:03.6 +43:32:19 15.7        86
Positions are for J2000

Event circumstances last updated at 2022/01/27 00:30:27 UT

Marc W. Buie, Southwest Research Institute

RECON