RECON: TNO occultation with 12UE185

Event between 12UE185 and star GA0860:03649080 with event index number of 2111863

Geocentric closest approach at 2024/01/05 09:22:07 UTC

J2000 position of star is 08:57:58.5 -02:47:40
Equinox of date position of star is 08:59:05.8 -02:52:53
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 71 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 37.2 AU from the Sun and 36.5 AU from the Earth.
The TNO is moving 20.7 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 205 seconds.
The 1-sigma cross-track error in the shadow position is 1724 km.
The sky-plane scale is 26438.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=306.2 km assuming a 5% albedo -- 14.9 sec chord
Diameter=125.0 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12UE185, (2024/01/05 09:19UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:38.9 +11:50:56  1.3 22.89  58
Alphard        09:28:46.1 -08:45:50  2.0  9.41  63
14 Hya         08:50:34.1 -03:32:01  5.3  2.25  73
PPM 191905     09:00:39.0 -03:04:45  8.5  0.41  71
PPM 191883     08:59:05.8 -03:02:39  9.0  0.16  71
12UE185        08:59:11.2 -02:53:18 16.0        71
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 4.4 sigma about the mid-time.
The median site spacing is 21.4 km RECON observability=1.0 and success probability=20.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:22:11 -51.0 Dark Up 35.0 185.6 Up 09:07:11 - 09:37:11 -763
Kamloops 09:22:59 -58.3 Dark Down 35.9 168.1 Up 09:07:59 - 09:37:59 -928
Kelowna 09:22:56 -58.6 Dark Down 36.8 169.1 Up 09:07:56 - 09:37:56 -978
Peachland 09:22:57 -58.8 Dark Down 36.9 168.7 Up 09:07:57 - 09:37:57 -987
Summerland 09:22:57 -58.9 Dark Down 37.0 168.8 Up 09:07:57 - 09:37:57 -996
Penticton 09:22:57 -58.9 Dark Down 37.1 168.9 Up 09:07:57 - 09:37:57 -1000
Oliver 09:22:57 -59.2 Dark Down 37.5 168.9 Up 09:07:57 - 09:37:57 -1025
Anarchist Mountain Observatory 09:22:56 -59.2 Dark Down 37.7 169.1 Up 09:07:56 - 09:37:56 -1035
Tonasket 09:22:57 -59.5 Dark Down 37.9 168.9 Up 09:07:57 - 09:37:57 -1057
Okanogan 09:22:57 -59.8 Dark Down 38.3 168.7 Up 09:07:57 - 09:37:57 -1082
Victoria 09:23:10 -61.1 Dark Down 37.5 164.0 Up 09:08:10 - 09:38:10 -1093
Brewster 09:22:58 -60.1 Dark Down 38.5 168.4 Up 09:07:58 - 09:37:58 -1102
Manson/Chelan 09:23:00 -60.4 Dark Down 38.7 167.9 Up 09:08:00 - 09:38:00 -1119
Wenatchee 09:23:00 -60.9 Dark Down 39.1 167.6 Up 09:08:00 - 09:38:00 -1154
Ellensburg 09:23:01 -61.3 Dark Down 39.5 167.3 Up 09:08:01 - 09:38:01 -1185
Yakima 09:23:01 -61.6 Dark Down 39.9 167.2 Up 09:08:01 - 09:38:01 -1215
Toppenish/White Swan 09:23:01 -61.7 Dark Down 40.1 167.3 Up 09:08:01 - 09:38:01 -1230
PNWRO 09:22:56 -61.3 Dark Down 40.7 169.2 Up 09:07:56 - 09:37:56 -1248
Goldendale 09:23:03 -62.3 Dark Down 40.6 166.7 Up 09:08:03 - 09:38:03 -1273
The Dalles 09:23:04 -62.6 Dark Down 40.7 166.2 Up 09:08:04 - 09:38:04 -1292
Maupin 09:23:04 -62.9 Dark Down 41.2 166.2 Up 09:08:04 - 09:38:04 -1323
Sisters 09:23:06 -63.8 Dark Down 41.9 165.4 Up 09:08:06 - 09:38:06 -1392
Bend 09:23:05 -63.9 Dark Down 42.2 165.7 Up 09:08:05 - 09:38:05 -1409
Oregon Observatory 09:23:06 -64.1 Dark Down 42.3 165.5 Up 09:08:06 - 09:38:06 -1423
North Lake 09:23:04 -64.3 Dark Down 43.1 166.1 Up 09:08:04 - 09:38:04 -1469
Chiloquin 09:23:08 -65.3 Dark Down 43.5 164.6 Up 09:08:08 - 09:38:08 -1528
Lakeview 09:23:02 -64.8 Dark Down 44.2 166.6 Up 09:08:02 - 09:38:02 -1548
Klamath Falls 09:23:08 -65.5 Dark Down 43.9 164.6 Up 09:08:08 - 09:38:08 -1555
Cedarville 09:23:02 -65.1 Dark Down 44.9 166.7 Up 09:08:02 - 09:38:02 -1600
Dunrhomin 09:22:02 -56.3 Dark Up 46.7 187.8 Up 09:07:02 - 09:37:02 -1612
CU-SBO 09:22:02 -56.5 Dark Up 46.9 187.7 Up 09:07:02 - 09:37:02 -1632
Fall River/Burney 09:23:07 -66.1 Dark Down 45.1 164.9 Up 09:08:07 - 09:38:07 -1647
Susanville 09:23:04 -66.2 Dark Down 45.9 165.7 Up 09:08:04 - 09:38:04 -1693
Gimple 09:23:05 -66.5 Dark Down 46.1 165.4 Up 09:08:05 - 09:38:05 -1717
Greenville 09:23:05 -66.5 Dark Down 46.1 165.2 Up 09:08:05 - 09:38:05 -1717
Quincy 09:23:05 -66.6 Dark Down 46.3 165.2 Up 09:08:05 - 09:38:05 -1734
Portola 09:23:04 -66.5 Dark Down 46.5 165.8 Up 09:08:04 - 09:38:04 -1741
Reno 09:23:01 -66.3 Dark Down 46.8 166.7 Up 09:08:01 - 09:38:01 -1759
Carson City 09:23:01 -66.5 Dark Down 47.2 166.6 Up 09:08:01 - 09:38:01 -1788
Yerington 09:22:58 -66.2 Dark Up 47.5 167.5 Up 09:07:58 - 09:37:58 -1800
Gardnerville 09:23:01 -66.6 Dark Down 47.4 166.6 Up 09:08:01 - 09:38:01 -1808
Hawthorne 09:22:57 -66.2 Dark Up 48.0 168.1 Up 09:07:57 - 09:37:57 -1836
Tonopah 09:22:51 -65.5 Dark Up 48.7 170.1 Up 09:07:51 - 09:37:51 -1865
Lee Vining 09:22:58 -66.8 Dark Up 48.5 167.3 Up 09:07:58 - 09:37:58 -1886
Bishop 09:22:56 -66.7 Dark Up 49.2 168.2 Up 09:07:56 - 09:37:56 -1932
Beatty 09:22:49 -65.8 Dark Up 49.9 170.6 Up 09:07:49 - 09:37:49 -1961
Indian Springs 09:22:45 -65.2 Dark Up 50.4 172.2 Up 09:07:45 - 09:37:45 -1982
Henderson 09:22:42 -65.0 Dark Up 51.0 173.1 Up 09:07:42 - 09:37:42 -2024
Patrick 09:22:37 -64.4 Dark Up 51.7 174.8 Up 09:07:37 - 09:37:37 -2071
Kingman/Dolan Springs 09:22:37 -64.6 Dark Up 51.9 174.5 Up 09:07:37 - 09:37:37 -2091
Laughlin/Bullhead City 09:22:40 -65.0 Dark Up 51.9 173.7 Up 09:07:40 - 09:37:40 -2097
Mohave Valley 09:22:40 -65.1 Dark Up 52.1 173.6 Up 09:07:40 - 09:37:40 -2121
Lake Havasu City 09:22:39 -65.1 Dark Up 52.6 174.0 Up 09:07:39 - 09:37:39 -2155
Parker 09:22:38 -65.2 Dark Up 52.9 174.0 Up 09:07:38 - 09:37:38 -2186
George/Scottsdale 09:22:28 -63.5 Dark Up 53.5 177.9 Up 09:07:28 - 09:37:28 -2207
Wildwood 09:22:57 -68.4 Dark Up 52.4 167.0 Up 09:07:57 - 09:37:57 -2219
Idyllwild 09:22:49 -67.2 Dark Up 53.0 170.0 Up 09:07:49 - 09:37:49 -2238
Calipatria 09:22:44 -66.5 Dark Up 53.8 171.8 Up 09:07:44 - 09:37:44 -2285
Yuma 09:22:40 -66.0 Dark Up 54.3 173.2 Up 09:07:40 - 09:37:40 -2318

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 12UE185, (2024/01/05 09:19UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 22.89  58
Alphard        09:27:35.2 -08:39:30  2.0  9.41  63
14 Hya         08:49:21.7 -03:26:35  5.3  2.25  73
PPM 191905     08:59:26.3 -02:59:05  8.5  0.41  71
PPM 191883     08:57:53.1 -02:57:01  9.0  0.16  71
12UE185        08:57:58.5 -02:47:40 16.0        71
Positions are for J2000

Event circumstances last updated at 2022/03/24 00:37:16 UT

Marc W. Buie, Southwest Research Institute

RECON