RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1200:01987991 with event index number of 2298156

Geocentric closest approach at 2023/01/14 12:25:10 UTC

J2000 position of star is 05:50:33.0 +31:34:20
Equinox of date position of star is 05:52:02.7 +31:34:37
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 109 degrees from the moon. Moon is 56% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 18.3 AU from the Sun and 17.5 AU from the Earth.
Apparent velocity is 22.5 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is 2626 km.
The sky-plane scale is 12663.7 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, (2023/01/14 12:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:14.7 +16:33:14  0.8 22.67 128
Alnath         05:27:45.0 +28:37:29  1.6  6.03 114
PPM 071002     05:56:28.8 +31:42:10  5.9  0.95 108
PPM 070907     05:51:58.2 +31:04:12  8.3  0.51 109
PPM 070914     05:52:31.1 +31:37:25  9.8  0.11 109
248835         05:52:02.7 +31:34:37 16.6       109
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 26.9 km RECON observability=0.5 and success probability=9.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:21:29 -24.4 Dark Up 15.8 301.4 Really Low 12:07:18 - 12:35:39 1996
Kamloops 12:21:25 -33.5 Dark Up 23.3 292.0 Low 12:07:14 - 12:35:35 1352
Kelowna 12:21:22 -33.0 Dark Up 22.4 292.9 Low 12:07:12 - 12:35:33 1319
Peachland 12:21:22 -33.2 Dark Up 22.6 292.7 Low 12:07:12 - 12:35:33 1299
Summerland 12:21:22 -33.1 Dark Up 22.5 292.9 Low 12:07:11 - 12:35:32 1290
Penticton 12:21:21 -33.1 Dark Up 22.4 293.0 Low 12:07:11 - 12:35:32 1289
Oliver 12:21:21 -33.1 Dark Up 22.2 293.1 Low 12:07:10 - 12:35:31 1260
Anarchist Mountain Observatory 12:21:20 -33.0 Dark Up 22.0 293.3 Low 12:07:10 - 12:35:31 1254
Okanogan 12:21:18 -33.2 Dark Up 21.9 293.4 Low 12:07:08 - 12:35:29 1192
Brewster 12:21:17 -33.4 Dark Up 21.9 293.3 Low 12:07:07 - 12:35:28 1162
Dunrhomin 12:20:58 -22.6 Dark Up 9.1 304.0 Really Low 12:06:47 - 12:35:08 1157
Nikitin 12:20:57 -22.6 Dark Up 9.0 304.0 Really Low 12:06:47 - 12:35:08 1141
CU-SBO 12:20:57 -22.6 Dark Up 9.0 304.0 Really Low 12:06:46 - 12:35:07 1132
Manson/Chelan 12:21:17 -33.6 Dark Up 22.1 293.2 Low 12:07:06 - 12:35:27 1130
Wenatchee 12:21:16 -33.8 Dark Up 22.0 293.2 Low 12:07:05 - 12:35:26 1084
Victoria 12:21:20 -35.7 Dark Up 24.3 290.9 Low 12:07:10 - 12:35:31 1063
Ellensburg 12:21:15 -34.0 Dark Up 22.0 293.3 Low 12:07:04 - 12:35:25 1041
PNWRO 12:21:11 -32.9 Dark Up 20.6 294.6 Low 12:07:01 - 12:35:22 1022
Yakima 12:21:14 -34.0 Dark Up 21.8 293.4 Low 12:07:03 - 12:35:24 1006
Toppenish/White Swan 12:21:13 -33.9 Dark Up 21.6 293.6 Low 12:07:03 - 12:35:24 994
The Dalles 12:21:11 -34.5 Dark Up 21.8 293.4 Low 12:07:01 - 12:35:22 897
Maupin 12:21:10 -34.5 Dark Up 21.6 293.6 Low 12:07:00 - 12:35:21 865
Sisters 12:21:08 -34.9 Dark Up 21.6 293.6 Low 12:06:58 - 12:35:19 769
Bend 12:21:07 -34.7 Dark Up 21.3 293.9 Low 12:06:57 - 12:35:18 759
Oregon Observatory 12:21:07 -34.8 Dark Up 21.3 293.8 Low 12:06:56 - 12:35:17 739
Chiloquin 12:21:04 -35.2 Dark Up 21.1 294.1 Low 12:06:54 - 12:35:15 606
Cedarville 12:21:01 -34.0 Dark Up 19.5 295.3 Really Low 12:06:50 - 12:35:11 585
Klamath Falls 12:21:04 -35.2 Dark Up 20.9 294.2 Low 12:06:53 - 12:35:14 579
Fall River/Burney 12:21:01 -34.9 Dark Up 20.2 294.8 Low 12:06:50 - 12:35:11 490
Gimple 12:20:58 -34.5 Dark Up 19.4 295.4 Really Low 12:06:48 - 12:35:09 431
Greenville 12:20:58 -34.6 Dark Up 19.5 295.4 Really Low 12:06:48 - 12:35:09 428
Reno 12:20:57 -33.7 Dark Up 18.4 296.1 Really Low 12:06:46 - 12:35:07 424
Portola 12:20:57 -34.2 Dark Up 19.0 295.7 Really Low 12:06:47 - 12:35:08 420
Quincy 12:20:58 -34.6 Dark Up 19.4 295.4 Really Low 12:06:48 - 12:35:09 410
Yerington 12:20:55 -33.2 Dark Up 17.7 296.6 Really Low 12:06:44 - 12:35:05 404
Carson City 12:20:56 -33.7 Dark Up 18.3 296.3 Really Low 12:06:45 - 12:35:06 393
Hawthorne 12:20:54 -32.8 Dark Up 17.2 297.0 Really Low 12:06:43 - 12:35:04 386
Gardnerville 12:20:55 -33.7 Dark Up 18.1 296.3 Really Low 12:06:45 - 12:35:06 373
Patrick 12:20:47 -28.8 Dark Up 12.4 300.1 Really Low 12:06:36 - 12:34:57 333
Beatty 12:20:50 -31.2 Dark Up 15.1 298.4 Really Low 12:06:40 - 12:35:01 327
Lee Vining 12:20:53 -33.2 Dark Up 17.3 296.9 Really Low 12:06:42 - 12:35:03 314
Bishop 12:20:51 -32.6 Dark Up 16.5 297.5 Really Low 12:06:41 - 12:35:02 293
George/Scottsdale 12:20:43 -26.9 Dark Up 10.1 301.4 Really Low 12:06:33 - 12:34:54 283
Laughlin/Bullhead City 12:20:46 -29.3 Dark Up 12.7 299.8 Really Low 12:06:36 - 12:34:57 276
Lake Havasu City 12:20:45 -29.0 Dark Up 12.2 300.1 Really Low 12:06:35 - 12:34:56 229
Yuma 12:20:42 -29.1 Dark Up 11.5 300.3 Really Low 12:06:32 - 12:34:53 53
Calipatria 12:20:43 -29.9 Dark Up 12.4 299.8 Really Low 12:06:32 - 12:34:53 48
Idyllwild 12:20:44 -30.9 Dark Up 13.6 299.1 Really Low 12:06:34 - 12:34:55 45
Wildwood 12:20:46 -32.5 Dark Up 15.1 298.2 Really Low 12:06:35 - 12:34:56 -13

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, (2023/01/14 12:25UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 22.67 128
Alnath         05:26:17.6 +28:36:23  1.6  6.03 114
PPM 071002     05:54:58.9 +31:42:02  5.9  0.95 108
PPM 070907     05:50:28.9 +31:03:54  8.3  0.51 109
PPM 070914     05:51:01.3 +31:37:08  9.8  0.11 109
248835         05:50:33.0 +31:34:20 16.6       109
Positions are for J2000

Event circumstances last updated at 2023/01/08 03:29:20 UT

Marc W. Buie, Southwest Research Institute

RECON