RECON: TNO occultation with 12UN177

Event between 12UN177 and star GA1280:00808778 with event index number of 1397153

Geocentric closest approach at 2024/10/31 04:07:00 UTC

J2000 position of star is 03:09:31.7 +38:21:15
Equinox of date position of star is 03:10:53.3 +38:26:01
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 36.3 AU from the Sun and 35.5 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 552 seconds.
The 1-sigma cross-track error in the shadow position is 5573 km.
The sky-plane scale is 25716.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=186.2 km assuming a 5% albedo -- 7.9 sec chord
Diameter=76.0 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12UN177, (2024/10/31 04:07UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:20.9 +16:33:26  0.8 28.91 133
Algol          03:09:47.7 +41:02:58  2.1  2.61 142
25Rho Per      03:06:46.6 +38:56:05  3.3  0.98 144
PPM 068165     03:11:42.1 +38:26:18  7.5  0.11 143
PPM 068148     03:10:50.7 +38:32:16  9.1  0.11 144
12UN177        03:11:07.5 +38:26:51 15.4       143
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 1.6 sigma about the mid-time.
The median site spacing is 20.2 km RECON observability=1.0 and success probability=8.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 04:09:28 -32.3 Dark Down 41.0 75.0 Up 03:54:28 - 04:24:28 -777
Clarence Fulton 04:09:18 -34.3 Dark Down 43.9 79.1 Up 03:54:18 - 04:24:18 -847
Peachland 04:09:20 -34.2 Dark Down 43.5 78.3 Up 03:54:20 - 04:24:20 -860
Kelowna 04:09:19 -34.3 Dark Down 43.8 78.6 Up 03:54:19 - 04:24:19 -866
Summerland 04:09:21 -34.3 Dark Down 43.6 78.3 Up 03:54:21 - 04:24:21 -874
Penticton 04:09:21 -34.4 Dark Down 43.6 78.3 Up 03:54:21 - 04:24:21 -884
Oliver 04:09:22 -34.5 Dark Down 43.6 77.9 Up 03:54:22 - 04:24:22 -908
Anarchist Mountain Observatory 04:09:23 -34.7 Dark Down 43.7 77.9 Up 03:54:23 - 04:24:23 -928
Tonasket 04:09:24 -34.8 Dark Down 43.5 77.6 Up 03:54:24 - 04:24:24 -946
Okanogan 04:09:25 -34.8 Dark Down 43.4 77.2 Up 03:54:25 - 04:24:25 -963
Manson/Chelan 04:09:27 -34.6 Dark Down 42.9 76.4 Up 03:54:27 - 04:24:27 -969
Brewster 04:09:26 -34.7 Dark Down 43.2 76.8 Up 03:54:26 - 04:24:26 -972
Wenatchee 04:09:29 -34.6 Dark Down 42.7 75.9 Up 03:54:29 - 04:24:29 -994
Ellensburg 04:09:31 -34.6 Dark Down 42.4 75.4 Up 03:54:31 - 04:24:31 -1013
Yakima 04:09:32 -34.7 Dark Down 42.3 75.0 Up 03:54:32 - 04:24:32 -1040
Toppenish/White Swan 04:09:33 -34.9 Dark Down 42.4 74.9 Up 03:54:33 - 04:24:33 -1063
The Dalles 04:09:37 -34.6 Dark Down 41.7 73.8 Up 03:54:37 - 04:24:37 -1080
Goldendale 04:09:35 -34.8 Dark Down 42.0 74.2 Up 03:54:35 - 04:24:35 -1082
Maupin 04:09:38 -34.8 Dark Down 41.6 73.5 Up 03:54:38 - 04:24:38 -1115
Pasco 04:09:32 -35.8 Dark Down 43.2 75.5 Up 03:54:32 - 04:24:32 -1132
Sisters 04:09:42 -34.7 Dark Down 41.0 72.5 Up 03:54:42 - 04:24:42 -1152
PNWRO 04:09:33 -36.0 Dark Down 43.3 75.4 Up 03:54:33 - 04:24:33 -1161
Redmond 04:09:41 -35.0 Dark Down 41.3 72.7 Up 03:54:41 - 04:24:41 -1174
Bend 04:09:42 -34.9 Dark Down 41.1 72.5 Up 03:54:42 - 04:24:42 -1182
Oregon Observatory 04:09:43 -34.9 Dark Down 41.0 72.3 Up 03:54:43 - 04:24:43 -1188
La Pine/Gilchrist 04:09:44 -34.9 Dark Down 40.9 72.1 Up 03:54:44 - 04:24:44 -1200
North Lake 04:09:44 -35.4 Dark Down 41.2 72.0 Up 03:54:44 - 04:24:44 -1261
Chiloquin 04:09:48 -34.9 Dark Down 40.3 71.0 Up 03:54:48 - 04:24:48 -1262
Klamath Falls 04:09:49 -35.1 Dark Down 40.3 70.8 Up 03:54:49 - 04:24:49 -1291
Paisley 04:09:46 -35.8 Dark Down 41.3 71.7 Up 03:54:46 - 04:24:46 -1319
Lakeview 04:09:47 -36.1 Dark Down 41.2 71.4 Up 03:54:47 - 04:24:47 -1366
Fall River/Burney 04:09:52 -35.6 Dark Down 40.1 70.0 Up 03:54:52 - 04:24:52 -1397
Cedarville 04:09:49 -36.4 Dark Down 41.2 70.9 Up 03:54:49 - 04:24:49 -1424
Susanville 04:09:53 -36.3 Dark Down 40.5 69.8 Up 03:54:53 - 04:24:53 -1483
Greenville 04:09:55 -36.2 Dark Down 40.2 69.5 Up 03:54:55 - 04:24:55 -1488
Gimple 04:09:54 -36.2 Dark Down 40.2 69.5 Up 03:54:54 - 04:24:54 -1492
Quincy 04:09:55 -36.2 Dark Down 40.1 69.3 Up 03:54:55 - 04:24:55 -1503
Portola 04:09:55 -36.6 Dark Down 40.4 69.4 Up 03:54:55 - 04:24:55 -1538
Reno 04:09:55 -37.2 Dark Down 40.8 69.5 Up 03:54:55 - 04:24:55 -1592
Carson City 04:09:57 -37.3 Dark Down 40.7 69.2 Up 03:54:57 - 04:24:57 -1621
Gardnerville 04:09:57 -37.4 Dark Down 40.6 69.0 Up 03:54:57 - 04:24:57 -1642
Yerington 04:09:56 -37.8 Dark Down 41.0 69.3 Up 03:54:56 - 04:24:56 -1670
Hawthorne 04:09:57 -38.3 Dark Down 41.3 69.1 Up 03:54:57 - 04:24:57 -1734
Lee Vining 04:09:59 -38.1 Dark Down 40.7 68.5 Up 03:54:59 - 04:24:59 -1752
Bishop 04:10:00 -38.7 Dark Down 41.0 68.3 Up 03:55:00 - 04:25:00 -1838
Tonopah 04:09:56 -39.5 Dark Down 42.1 69.2 Up 03:54:56 - 04:24:56 -1846
CPSLO 04:10:09 -37.4 Dark Down 38.6 65.9 Up 03:55:09 - 04:25:09 -1876
Beatty 04:09:59 -40.1 Dark Down 42.1 68.4 Up 03:54:59 - 04:24:59 -1963
Indian Springs 04:09:58 -41.0 Dark Down 42.8 68.5 Up 03:54:58 - 04:24:58 -2048
Wildwood 04:10:10 -39.2 Dark Down 39.6 65.6 Up 03:55:10 - 04:25:10 -2088
Henderson 04:09:59 -41.7 Dark Down 43.1 68.3 Up 03:54:59 - 04:24:59 -2130
Idyllwild 04:10:08 -40.8 Dark Down 40.9 65.9 Up 03:55:08 - 04:25:08 -2224
Laughlin/Bullhead City 04:10:01 -42.2 Dark Down 43.1 67.6 Up 03:55:01 - 04:25:01 -2224
Patrick 04:09:58 -42.7 Dark Down 43.7 68.1 Up 03:54:58 - 04:24:58 -2242
Mohave Valley 04:10:01 -42.3 Dark Down 43.0 67.4 Up 03:55:01 - 04:25:01 -2247
Kingman/Dolan Springs 04:10:00 -42.6 Dark Down 43.5 67.8 Up 03:55:00 - 04:25:00 -2250
Dunrhomin 04:09:29 -47.4 Dark Down 51.6 76.1 Up 03:54:29 - 04:24:29 -2275
Lake Havasu City 04:10:02 -42.6 Dark Down 43.0 67.1 Up 03:55:02 - 04:25:02 -2294
Parker 04:10:03 -42.7 Dark Down 42.9 66.8 Up 03:55:03 - 04:25:03 -2325
Calipatria 04:10:07 -41.9 Dark Down 41.6 65.7 Up 03:55:07 - 04:25:07 -2341
Blythe 04:10:05 -42.6 Dark Down 42.5 66.3 Up 03:55:05 - 04:25:05 -2352
Yuma 04:10:07 -42.8 Dark Down 42.1 65.5 Up 03:55:07 - 04:25:07 -2428
George/Scottsdale 04:10:00 -44.8 Dark Down 44.6 67.1 Up 03:55:00 - 04:25:00 -2495

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 12UN177, (2024/10/31 04:07UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 28.91 133
Algol          03:08:10.1 +40:57:20  2.1  2.61 142
25Rho Per      03:05:10.8 +38:50:23  3.3  0.98 144
PPM 068165     03:10:06.3 +38:20:44  7.5  0.11 143
PPM 068148     03:09:14.9 +38:26:40  9.1  0.11 144
12UN177        03:09:31.7 +38:21:15 15.4       144
Positions are for J2000

Event circumstances last updated at 2021/02/28 00:27:32 UT

Marc W. Buie, Southwest Research Institute

RECON