RECON: TNO occultation with 15RT245

Event between 15RT245 and star GA0980:00114379 with event index number of 1990877

Geocentric closest approach at 2027/10/27 10:50:50 UTC

J2000 position of star is 01:18:25.5 +09:06:13
Equinox of date position of star is 01:19:37.6 +09:13:25
Stellar brightness G=13.2, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 164 degrees from the moon. Moon is 6% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 42.7 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 264 seconds.
The 1-sigma cross-track error in the shadow position is 4816 km.
The sky-plane scale is 30283.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=287.1 km assuming a 5% albedo -- 11.7 sec chord
Diameter=117.2 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 15RT245, (2027/10/27 10:52UT)
Object            RA         Dec     mag  sep  mel
6Bet Ari       01:56:10.9 +20:56:35  2.6 14.60 152
PPM 144653     01:30:30.4 +07:26:13  6.4  3.19 162
PPM 144479     01:20:55.8 +08:32:31  8.5  0.75 164
PPM 144448     01:18:42.3 +09:02:03  9.8  0.36 165
PPM 144463     01:19:40.8 +09:04:24 10.5  0.18 164
15RT245        01:19:53.1 +09:14:58 13.2       164
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 3.4 sigma about the mid-time.
The median site spacing is 38.4 km RECON observability=0.9 and success probability=4.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:47:17 -28.3 Dark Down 18.3 261.2 Really Low 10:32:17 - 11:02:17 10546
Kamloops 10:47:34 -37.1 Dark Down 27.3 249.6 Low 10:32:34 - 11:02:34 10435
Kelowna 10:47:31 -37.0 Dark Down 27.0 250.7 Low 10:32:31 - 11:02:31 10350
Peachland 10:47:31 -37.3 Dark Down 27.3 250.5 Low 10:32:31 - 11:02:31 10341
Summerland 10:47:31 -37.3 Dark Down 27.3 250.7 Low 10:32:31 - 11:02:31 10325
Penticton 10:47:30 -37.2 Dark Down 27.2 250.8 Low 10:32:30 - 11:02:30 10318
Oliver 10:47:30 -37.4 Dark Down 27.3 251.0 Low 10:32:30 - 11:02:30 10283
Anarchist Mountain Observatory 10:47:29 -37.4 Dark Down 27.3 251.2 Low 10:32:29 - 11:02:29 10265
Victoria 10:47:36 -39.9 Dark Down 29.9 248.0 Low 10:32:36 - 11:02:36 10241
Okanogan 10:47:29 -37.8 Dark Down 27.6 251.4 Low 10:32:29 - 11:02:29 10201
Brewster 10:47:29 -38.0 Dark Down 27.8 251.3 Low 10:32:29 - 11:02:29 10175
Manson/Chelan 10:47:29 -38.4 Dark Down 28.1 251.1 Low 10:32:29 - 11:02:29 10156
Wenatchee 10:47:29 -38.7 Dark Down 28.4 251.2 Low 10:32:29 - 11:02:29 10109
Ellensburg 10:47:28 -39.0 Dark Down 28.7 251.2 Low 10:32:28 - 11:02:28 10069
Yakima 10:47:28 -39.2 Dark Down 28.8 251.4 Low 10:32:28 - 11:02:28 10027
Toppenish/White Swan 10:47:27 -39.2 Dark Down 28.8 251.7 Low 10:32:27 - 11:02:27 10004
PNWRO 10:47:24 -38.4 Dark Down 27.9 253.1 Low 10:32:24 - 11:02:24 9958
The Dalles 10:47:28 -40.0 Dark Down 29.5 251.4 Low 10:32:28 - 11:02:28 9930
Maupin 10:47:28 -40.1 Dark Down 29.6 251.7 Low 10:32:28 - 11:02:28 9886
Sisters 10:47:27 -40.8 Dark Down 30.2 251.8 Up 10:32:27 - 11:02:27 9799
Bend 10:47:27 -40.8 Dark Down 30.1 252.2 Up 10:32:27 - 11:02:27 9772
Oregon Observatory 10:47:26 -40.9 Dark Down 30.2 252.1 Up 10:32:26 - 11:02:26 9755
Chiloquin 10:47:26 -41.8 Dark Down 30.9 252.5 Up 10:32:26 - 11:02:26 9621
Klamath Falls 10:47:25 -41.9 Dark Down 31.0 252.8 Up 10:32:25 - 11:02:25 9585
Cedarville 10:47:21 -41.0 Dark Down 30.0 254.5 Up 10:32:21 - 11:02:21 9501
Fall River/Burney 10:47:23 -42.1 Dark Down 31.1 253.8 Up 10:32:23 - 11:02:23 9458
Greenville 10:47:22 -42.1 Dark Down 31.0 254.6 Up 10:32:22 - 11:02:22 9359
Gimple 10:47:22 -42.1 Dark Down 30.9 254.7 Up 10:32:22 - 11:02:22 9359
Quincy 10:47:22 -42.2 Dark Down 31.0 254.8 Up 10:32:22 - 11:02:22 9338
Dunrhomin 10:46:57 -30.6 Dark Down 19.2 265.7 Really Low 10:31:57 - 11:01:57 9334
Portola 10:47:22 -41.9 Dark Down 30.7 255.2 Up 10:32:22 - 11:02:22 9321
CU-SBO 10:46:57 -30.7 Dark Down 19.3 265.7 Really Low 10:31:57 - 11:01:57 9307
Reno 10:47:19 -41.5 Dark Down 30.3 255.8 Up 10:32:19 - 11:02:19 9289
Carson City 10:47:19 -41.6 Dark Down 30.4 256.1 Up 10:32:19 - 11:02:19 9250
Yerington 10:47:18 -41.2 Dark Down 29.9 256.6 Low 10:32:18 - 11:02:18 9226
Gardnerville 10:47:18 -41.7 Dark Down 30.4 256.2 Up 10:32:18 - 11:02:18 9224
Hawthorne 10:47:16 -41.0 Dark Down 29.6 257.3 Low 10:32:16 - 11:02:16 9173
Lee Vining 10:47:17 -41.5 Dark Down 30.1 257.2 Up 10:32:17 - 11:02:17 9115
Bishop 10:47:14 -41.2 Dark Down 29.7 258.1 Low 10:32:14 - 11:02:14 9047
Beatty 10:47:11 -40.1 Dark Down 28.5 259.5 Low 10:32:11 - 11:02:11 8988
Patrick 10:47:05 -38.2 Dark Down 26.5 262.1 Low 10:32:05 - 11:02:05 8816
Laughlin/Bullhead City 10:47:06 -38.8 Dark Down 27.1 261.8 Low 10:32:06 - 11:02:06 8791
Lake Havasu City 10:47:05 -38.7 Dark Down 27.0 262.3 Low 10:32:05 - 11:02:05 8717
Wildwood 10:47:13 -42.3 Dark Down 30.5 259.8 Up 10:32:13 - 11:02:13 8694
Idyllwild 10:47:09 -40.8 Dark Down 29.0 261.2 Low 10:32:09 - 11:02:09 8645
George/Scottsdale 10:47:00 -36.9 Dark Down 25.1 264.1 Low 10:32:00 - 11:02:00 8626
Calipatria 10:47:06 -40.0 Dark Down 28.2 262.2 Low 10:32:06 - 11:02:06 8572
Yuma 10:47:04 -39.4 Dark Down 27.5 263.0 Low 10:32:04 - 11:02:04 8522

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 15RT245, (2027/10/27 10:52UT)
Object            RA         Dec     mag  sep  mel
6Bet Ari       01:54:38.5 +20:48:26  2.6 14.60 152
PPM 144653     01:29:03.1 +07:17:38  6.4  3.19 162
PPM 144479     01:19:28.3 +08:23:48  8.5  0.75 164
PPM 144448     01:17:14.8 +08:53:17  9.8  0.36 165
PPM 144463     01:18:13.3 +08:55:39 10.5  0.18 164
15RT245        01:18:25.5 +09:06:13 13.2       164
Positions are for J2000

Event circumstances last updated at 2022/11/24 02:55:33 UT

Marc W. Buie, Southwest Research Institute

RECON