RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1180:02315407 with event index number of 2298363

Geocentric closest approach at 2023/12/03 06:27:56 UTC

J2000 position of star is 06:16:30.4 +29:11:05
Equinox of date position of star is 06:18:01.5 +29:10:29
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon. Moon is 68% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 18.9 AU from the Sun and 18.0 AU from the Earth.
Apparent velocity is 22.8 km/sec on the sky relative to the star, or, 6.3 arcsec/hr.
The 1-sigma error in the time of the event is 210 seconds.
The 1-sigma cross-track error in the shadow position is 3731 km.
The sky-plane scale is 13086.0 km/arcsec.

The object has an absolute magnitude Hv=9.4
Diameter=75.9 km assuming a 5% albedo -- 3.5 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2023/12/03 06:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:46.7 +27:57:59  1.1 19.49  26
Alnath         05:27:48.4 +28:37:32  1.6 11.00  57
44Kap Aur      06:16:54.2 +29:29:14  4.3  0.40  46
PPM 095721     06:19:17.1 +29:12:32  7.7  0.28  45
248835         06:18:01.7 +29:10:29 15.8        45
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 4.3 sigma about the mid-time.
The median site spacing is 30.0 km RECON observability=1.0 and success probability=14.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:29:52 -57.3 Dark Up 50.1 105.1 Up 06:14:52 - 06:44:52 2079
Victoria 06:30:04 -57.7 Dark Up 48.7 99.9 Up 06:15:04 - 06:45:04 1985
Kelowna 06:29:52 -58.3 Dark Up 50.9 105.0 Up 06:14:52 - 06:44:52 1983
Peachland 06:29:53 -58.3 Dark Up 50.7 104.6 Up 06:14:53 - 06:44:53 1982
Summerland 06:29:53 -58.4 Dark Up 50.8 104.5 Up 06:14:53 - 06:44:53 1966
Penticton 06:29:54 -58.5 Dark Up 50.9 104.5 Up 06:14:54 - 06:44:54 1957
Oliver 06:29:54 -58.8 Dark Up 51.0 104.1 Up 06:14:54 - 06:44:54 1927
Anarchist Mountain Observatory 06:29:55 -59.0 Dark Up 51.1 104.1 Up 06:14:55 - 06:44:55 1906
Okanogan 06:29:57 -59.5 Dark Up 51.2 103.1 Up 06:14:57 - 06:44:57 1856
Sleaford 06:29:05 -59.6 Dark Up 57.7 123.0 Up 06:14:05 - 06:44:05 1850
Brewster 06:29:58 -59.6 Dark Up 51.1 102.6 Up 06:14:58 - 06:44:58 1838
Manson/Chelan 06:30:00 -59.6 Dark Up 50.9 102.0 Up 06:15:00 - 06:45:00 1831
Wenatchee 06:30:01 -59.9 Dark Up 50.9 101.3 Up 06:15:01 - 06:45:01 1794
Ellensburg 06:30:03 -60.1 Dark Up 50.8 100.6 Up 06:15:03 - 06:45:03 1764
Yakima 06:30:04 -60.4 Dark Up 50.9 100.1 Up 06:15:04 - 06:45:04 1728
Toppenish/White Swan 06:30:04 -60.7 Dark Up 51.0 100.0 Up 06:15:04 - 06:45:04 1704
The Dalles 06:30:08 -60.9 Dark Up 50.6 98.4 Up 06:15:08 - 06:45:08 1659
PNWRO 06:30:02 -61.6 Dark Up 52.1 100.8 Up 06:15:02 - 06:45:02 1624
Maupin 06:30:09 -61.2 Dark Up 50.8 98.0 Up 06:15:09 - 06:45:09 1618
Sisters 06:30:13 -61.6 Dark Up 50.5 96.5 Up 06:15:13 - 06:45:13 1555
Bend 06:30:13 -61.9 Dark Up 50.8 96.4 Up 06:15:13 - 06:45:13 1525
Oregon Observatory 06:30:14 -62.0 Dark Up 50.7 96.1 Up 06:15:14 - 06:45:14 1513
Chiloquin 06:30:18 -62.7 Dark Up 50.5 94.2 Up 06:15:18 - 06:45:18 1407
Klamath Falls 06:30:19 -62.9 Dark Up 50.6 93.9 Up 06:15:19 - 06:45:19 1373
Cedarville 06:30:17 -64.3 Dark Up 51.8 94.2 Up 06:15:17 - 06:45:17 1254
Fall River/Burney 06:30:21 -63.9 Dark Up 51.0 92.7 Up 06:15:21 - 06:45:21 1250
Greenville 06:30:22 -64.8 Dark Up 51.3 91.9 Up 06:15:22 - 06:45:22 1150
Gimple 06:30:23 -64.8 Dark Up 51.4 92.0 Up 06:15:23 - 06:45:23 1147
Quincy 06:30:23 -64.9 Dark Up 51.4 91.6 Up 06:15:23 - 06:45:23 1131
Portola 06:30:22 -65.3 Dark Up 51.7 91.8 Up 06:15:22 - 06:45:22 1103
Reno 06:30:21 -65.8 Dark Up 52.2 91.9 Up 06:15:21 - 06:45:21 1055
Carson City 06:30:22 -66.1 Dark Up 52.3 91.5 Up 06:15:22 - 06:45:22 1020
Gardnerville 06:30:23 -66.3 Dark Up 52.3 91.2 Up 06:15:23 - 06:45:23 996
Yerington 06:30:21 -66.6 Dark Up 52.8 91.6 Up 06:15:21 - 06:45:21 980
Hawthorne 06:30:21 -67.2 Dark Up 53.2 91.3 Up 06:15:21 - 06:45:21 917
Lee Vining 06:30:23 -67.3 Dark Up 52.8 90.3 Up 06:15:23 - 06:45:23 880
Bishop 06:30:23 -68.1 Dark Up 53.4 89.9 Up 06:15:23 - 06:45:23 797
Beatty 06:30:20 -69.4 Dark Up 54.7 90.3 Up 06:15:20 - 06:45:20 695
Dunrhomin 06:29:38 -71.3 Dark Up 63.1 104.9 Up 06:14:38 - 06:44:38 672
Nikitin 06:29:38 -71.5 Dark Up 63.1 104.5 Up 06:14:38 - 06:44:38 654
CU-SBO 06:29:39 -71.5 Dark Up 63.1 104.3 Up 06:14:39 - 06:44:39 650
Wildwood 06:30:31 -69.9 Dark Up 53.1 85.5 Up 06:15:31 - 06:45:31 485
Patrick 06:30:15 -72.1 Dark Up 57.0 89.8 Up 06:15:15 - 06:45:15 450
Laughlin/Bullhead City 06:30:17 -71.8 Dark Up 56.4 89.0 Up 06:15:17 - 06:45:17 450
Idyllwild 06:30:26 -71.4 Dark Up 54.6 85.9 Up 06:15:26 - 06:45:26 382
Lake Havasu City 06:30:18 -72.4 Dark Up 56.6 88.1 Up 06:15:18 - 06:45:18 374
Calipatria 06:30:24 -72.5 Dark Up 55.6 85.5 Up 06:15:24 - 06:45:24 279
George/Scottsdale 06:30:12 -74.5 Dark Up 58.6 88.2 Up 06:15:12 - 06:45:12 212
Yuma 06:30:22 -73.4 Dark Up 56.3 85.3 Up 06:15:22 - 06:45:22 204

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 248835, (2023/12/03 06:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 19.49  26
Alnath         05:26:17.6 +28:36:23  1.6 11.00  57
44Kap Aur      06:15:22.6 +29:29:47  4.3  0.40  46
PPM 095721     06:17:45.7 +29:13:11  7.7  0.28  45
248835         06:16:30.4 +29:11:05 15.8        46
Positions are for J2000

Event circumstances last updated at 2023/11/05 04:12:39 UT

Marc W. Buie, Southwest Research Institute

RECON