RECON: TNO occultation with 308193

Event between (308193) 05CB79 and star GA1180:03419133 with event index number of 2295291

Geocentric closest approach at 2027/03/12 09:44:00 UTC

J2000 position of star is 11:40:22.0 +28:00:42
Equinox of date position of star is 11:41:38.2 +27:52:37
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 118 degrees from the moon. Moon is 17% illuminated.
Apparent brightness V=20.5

[RECON map]
Object is 38.1 AU from the Sun and 37.2 AU from the Earth.
Apparent velocity is 24.9 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 109 seconds.
The 1-sigma cross-track error in the shadow position is 1724 km.
The sky-plane scale is 27001.1 km/arcsec.

The object has an absolute magnitude Hv=4.7
Diameter=682.4 km assuming a 5% albedo -- 27.8 sec chord
Diameter=278.6 km assuming a 30% albedo -- 11.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 308193, (2027/03/12 09:44UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:49.1 +11:50:00  1.3 26.82 110
68Del Leo      11:15:33.0 +20:22:28  2.6  9.58 119
PPM 101269     11:37:43.6 +27:37:50  5.9  0.93 118
PPM 101354     11:44:47.8 +27:54:16  7.8  0.67 119
PPM 101315     11:41:14.5 +28:01:38  9.5  0.21 118
PPM 101323     11:41:36.3 +27:45:16 10.1  0.11 118
308193         11:41:47.2 +27:51:39 14.9       119
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 14.7 km RECON observability=1.0 and success probability=0.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:43:29 -32.2 Dark Down 54.8 240.5 Up 09:33:54 - 09:53:05 5561
Kamloops 09:43:53 -38.8 Dark Down 62.6 221.8 Up 09:34:18 - 09:53:29 4883
Kelowna 09:43:49 -39.2 Dark Down 62.8 224.4 Up 09:34:14 - 09:53:25 4855
Peachland 09:43:49 -39.4 Dark Down 63.0 224.0 Up 09:34:14 - 09:53:25 4834
Summerland 09:43:49 -39.5 Dark Down 63.1 224.4 Up 09:34:14 - 09:53:25 4827
Penticton 09:43:49 -39.5 Dark Down 63.1 224.7 Up 09:34:13 - 09:53:24 4826
Oliver 09:43:47 -39.8 Dark Down 63.4 225.2 Up 09:34:11 - 09:53:22 4798
Anarchist Mountain Observatory 09:43:47 -39.9 Dark Down 63.4 225.7 Up 09:34:11 - 09:53:22 4793
Dunrhomin 09:42:49 -39.6 Dark Down 58.6 258.1 Up 09:33:13 - 09:52:24 4775
Nikitin 09:42:49 -39.7 Dark Down 58.7 258.4 Up 09:33:13 - 09:52:24 4760
CU-SBO 09:42:48 -39.8 Dark Down 58.7 258.4 Up 09:33:13 - 09:52:24 4751
Okanogan 09:43:46 -40.5 Dark Down 63.9 226.3 Up 09:34:10 - 09:53:21 4733
Brewster 09:43:45 -40.8 Dark Down 64.2 226.3 Up 09:34:09 - 09:53:20 4703
Manson/Chelan 09:43:45 -41.1 Dark Down 64.5 226.0 Up 09:34:10 - 09:53:21 4672
Wenatchee 09:43:44 -41.6 Dark Down 65.0 226.4 Up 09:34:09 - 09:53:20 4626
Victoria 09:43:54 -41.6 Dark Down 65.5 219.3 Up 09:34:18 - 09:53:29 4591
Ellensburg 09:43:44 -42.0 Dark Down 65.4 226.7 Up 09:34:08 - 09:53:19 4584
PNWRO 09:43:37 -42.3 Dark Down 65.2 231.1 Up 09:34:02 - 09:53:13 4574
Yakima 09:43:43 -42.4 Dark Down 65.6 227.3 Up 09:34:08 - 09:53:19 4550
Toppenish/White Swan 09:43:42 -42.5 Dark Down 65.7 228.0 Up 09:34:06 - 09:53:17 4540
The Dalles 09:43:41 -43.5 Dark Down 66.6 227.9 Up 09:34:06 - 09:53:17 4443
Maupin 09:43:40 -43.8 Dark Down 66.9 228.8 Up 09:34:04 - 09:53:15 4413
Sisters 09:43:39 -44.7 Dark Down 67.7 229.5 Up 09:34:03 - 09:53:14 4318
Bend 09:43:37 -44.8 Dark Down 67.7 230.4 Up 09:34:02 - 09:53:13 4310
Oregon Observatory 09:43:37 -45.0 Dark Down 67.9 230.5 Up 09:34:02 - 09:53:13 4290
Chiloquin 09:43:35 -46.3 Dark Down 69.0 232.3 Up 09:33:59 - 09:53:10 4160
Cedarville 09:43:28 -46.5 Dark Down 68.6 237.4 Up 09:33:53 - 09:53:04 4148
Klamath Falls 09:43:33 -46.6 Dark Down 69.1 233.1 Up 09:33:57 - 09:53:08 4134
Fall River/Burney 09:43:30 -47.4 Dark Down 69.6 236.3 Up 09:33:54 - 09:53:05 4051
Gimple 09:43:25 -47.9 Dark Down 69.7 239.3 Up 09:33:50 - 09:53:01 3998
Reno 09:43:21 -48.0 Dark Down 69.3 242.4 Up 09:33:46 - 09:52:57 3996
Greenville 09:43:26 -48.0 Dark Down 69.8 239.2 Up 09:33:51 - 09:53:02 3994
Portola 09:43:23 -48.0 Dark Down 69.6 240.7 Up 09:33:48 - 09:52:59 3988
Yerington 09:43:18 -48.1 Dark Down 69.1 244.7 Up 09:33:43 - 09:52:54 3980
Quincy 09:43:26 -48.1 Dark Down 69.9 239.7 Up 09:33:50 - 09:53:01 3977
Carson City 09:43:20 -48.2 Dark Down 69.5 243.3 Up 09:33:45 - 09:52:56 3966
Hawthorne 09:43:15 -48.2 Dark Down 69.0 246.6 Up 09:33:40 - 09:52:51 3966
Gardnerville 09:43:20 -48.4 Dark Down 69.6 243.9 Up 09:33:44 - 09:52:55 3948
Patrick 09:42:54 -47.9 Dark Down 66.3 259.3 Up 09:33:18 - 09:52:29 3942
Beatty 09:43:06 -48.5 Dark Down 68.2 252.9 Up 09:33:30 - 09:52:41 3920
George/Scottsdale 09:42:45 -47.8 Dark Down 64.9 264.6 Up 09:33:10 - 09:52:21 3905
Lee Vining 09:43:15 -48.9 Dark Down 69.5 247.2 Up 09:33:40 - 09:52:51 3894
Laughlin/Bullhead City 09:42:55 -48.5 Dark Down 66.9 259.2 Up 09:33:19 - 09:52:30 3884
Bishop 09:43:11 -49.0 Dark Down 69.2 249.7 Up 09:33:36 - 09:52:47 3878
Lake Havasu City 09:42:53 -48.8 Dark Down 66.8 261.0 Up 09:33:17 - 09:52:28 3840
Yuma 09:42:48 -50.3 Dark Down 67.3 264.9 Up 09:33:13 - 09:52:24 3669
Calipatria 09:42:52 -50.5 Dark Down 68.0 263.2 Up 09:33:17 - 09:52:28 3659
Idyllwild 09:42:57 -50.8 Dark Down 68.9 260.7 Up 09:33:22 - 09:52:33 3650
Wildwood 09:43:03 -51.6 Dark Down 70.3 257.9 Up 09:33:28 - 09:52:39 3583

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 308193, (2027/03/12 09:44UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 26.82 110
68Del Leo      11:14:06.7 +20:31:23  2.6  9.58 119
PPM 101269     11:36:18.0 +27:46:52  5.9  0.93 118
PPM 101354     11:43:22.9 +28:03:19  7.8  0.67 119
PPM 101315     11:39:49.2 +28:10:41  9.5  0.21 118
PPM 101323     11:40:11.1 +27:54:19 10.1  0.11 118
308193         11:40:22.0 +28:00:42 14.9       118
Positions are for J2000

Event circumstances last updated at 2024/04/23 03:26:33 UT

Marc W. Buie, Southwest Research Institute

RECON