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 03:10:46.7 +38:25:38
Stellar brightness G=15.4, use SENSEUP=128
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 5582 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 +16:33:27  0.8 28.91 133
Algol          03:09:47.7 +41:02:58  2.1  2.61 142
25Rho Per      03:06:46.6 +38:56:06  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 16.5 km RECON observability=1.0 and success probability=7.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 04:09:19 -34.4 Dark Down 43.8 78.7 Up 03:54:19 - 04:24:19 -867
Summerland 04:09:21 -34.3 Dark Down 43.6 78.3 Up 03:54:21 - 04:24:21 -875
Penticton 04:09:21 -34.4 Dark Down 43.6 78.3 Up 03:54:21 - 04:24:21 -884
Okanagan Falls 04:09:22 -34.4 Dark Down 43.6 78.1 Up 03:54:22 - 04:24:22 -896
Oliver 04:09:22 -34.5 Dark Down 43.6 77.9 Up 03:54:22 - 04:24:22 -908
Anarchist Mountain Observatory 04:09:22 -34.7 Dark Down 43.7 77.9 Up 03:54:22 - 04:24:22 -929
Oroville 04:09:23 -34.7 Dark Down 43.6 77.8 Up 03:54:23 - 04:24:23 -930
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 -970
Brewster 04:09:26 -34.7 Dark Down 43.2 76.8 Up 03:54:26 - 04:24:26 -972
Entiat 04:09:28 -34.6 Dark Down 42.8 76.2 Up 03:54:28 - 04:24:28 -982
Wenatchee 04:09:29 -34.6 Dark Down 42.7 75.9 Up 03:54:29 - 04:24:29 -995
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 04:09:36 -34.6 Dark Down 41.7 73.8 Up 03:54:36 - 04:24:36 -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
George/Umatilla 04:09:33 -35.7 Dark Down 43.0 75.1 Up 03:54:33 - 04:24:33 -1146
Madras/Culver 04:09:40 -34.9 Dark Down 41.4 73.0 Up 03:54:40 - 04:24:40 -1151
Sisters 04:09:41 -34.7 Dark Down 41.0 72.5 Up 03:54:41 - 04:24:41 -1153
PNWRO 04:09:32 -36.0 Dark Down 43.3 75.4 Up 03:54:32 - 04:24:32 -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 -1183
Oregon Observatory 04:09:43 -34.9 Dark Down 41.0 72.3 Up 03:54:43 - 04:24:43 -1189
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 -1262
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 -1320
Tulelake 04:09:49 -35.4 Dark Down 40.4 70.7 Up 03:54:49 - 04:24:49 -1326
Lakeview 04:09:47 -36.1 Dark Down 41.2 71.4 Up 03:54:47 - 04:24:47 -1367
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 -1425
Susanville 04:09:53 -36.3 Dark Down 40.5 69.8 Up 03:54:53 - 04:24:53 -1483
Greenville 04:09:54 -36.2 Dark Down 40.2 69.5 Up 03:54:54 - 04:24:54 -1488
Gimple 04:09:55 -36.2 Dark Down 40.2 69.5 Up 03:54:55 - 04:24:55 -1493
Quincy 04:09:55 -36.2 Dark Down 40.1 69.3 Up 03:54:55 - 04:24:55 -1504
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 -1593
Carson City 04:09:56 -37.3 Dark Down 40.7 69.2 Up 03:54:56 - 04:24:56 -1622
Gardnerville 04:09:57 -37.4 Dark Down 40.6 69.0 Up 03:54:57 - 04:24:57 -1643
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 -1735
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 -1847
CPSLO 04:10:09 -37.4 Dark Down 38.6 65.9 Up 03:55:09 - 04:25:09 -1876
Lone Pine 04:10:02 -39.2 Dark Down 41.0 67.8 Up 03:55:02 - 04:25:02 -1917
Beatty 04:09:59 -40.1 Dark Down 42.1 68.4 Up 03:54:59 - 04:24:59 -1964
Indian Springs 04:09:58 -41.0 Dark Down 42.8 68.5 Up 03:54:58 - 04:24:58 -2049
Wildwood 04:10:09 -39.2 Dark Down 39.6 65.6 Up 03:55:09 - 04:25:09 -2088
Henderson 04:09:59 -41.7 Dark Down 43.1 68.3 Up 03:54:59 - 04:24:59 -2130
Searchlight/Boulder City 04:10:00 -41.9 Dark Down 42.9 67.8 Up 03:55:00 - 04:25:00 -2180
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 04:09:59 -42.7 Dark Down 43.7 68.1 Up 03:54:59 - 04:24:59 -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 -2251
Niwot 04:09:30 -47.5 Dark Down 51.6 75.9 Up 03:54:30 - 04:24:30 -2288
SwRI 04:09:30 -47.5 Dark Down 51.5 75.7 Up 03:54:30 - 04:24:30 -2293
Lake Havasu City 04:10:02 -42.6 Dark Down 43.0 67.1 Up 03:55:02 - 04:25:02 -2294
DCO 04:09:58 -43.4 Dark Down 44.1 68.0 Up 03:54:58 - 04:24:58 -2306
Parker 04:10:03 -42.7 Dark Down 42.9 66.8 Up 03:55:03 - 04:25:03 -2325
Calipatria 04:10:08 -41.9 Dark Down 41.6 65.7 Up 03:55:08 - 04:25:08 -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

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 +16:30:30  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 2019/06/08 09:20:04 UT

Marc W. Buie, Southwest Research Institute

RECON