RECON: TNO occultation with 15875

Event between (15875) 96TP66 and star GA1160:02116160 with event index number of 1210949

Geocentric closest approach at 2023/02/18 05:20:55 UTC

J2000 position of star is 06:16:57.1 +27:13:50
Equinox of date position of star is 06:18:23.7 +27:13:14
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 154 degrees from the moon. Moon is 7% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 30.5 AU from the Sun and 29.9 AU from the Earth.
Apparent velocity is 11.9 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 412 seconds.
The 1-sigma cross-track error in the shadow position is 1224 km.
The sky-plane scale is 21718.5 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=204.2 km assuming a 5% albedo -- 17.1 sec chord
Diameter=83.4 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 15875, (2023/02/18 05:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.8 +27:58:06  1.1 19.56 173
Alnath         05:27:45.4 +28:37:29  1.6 11.27 143
44Kap Aur      06:16:51.1 +29:29:15  4.3  2.29 154
PPM 095737     06:19:47.7 +27:11:56  7.8  0.31 154
PPM 095711     06:18:47.0 +27:16:50  9.7  0.10 154
15875          06:18:24.1 +27:13:14 16.6       154
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 2.2 sigma about the mid-time.
The median site spacing is 37.4 km RECON observability=1.0 and success probability=45.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:17:52 -43.0 Dark Down 57.9 229.9 Up 05:02:52 - 05:32:52 952
Kamloops 05:19:09 -37.1 Dark Down 64.5 208.0 Up 05:04:09 - 05:34:09 789
Kelowna 05:19:04 -38.0 Dark Down 65.0 210.5 Up 05:04:04 - 05:34:04 703
Peachland 05:19:05 -37.9 Dark Down 65.2 210.1 Up 05:04:05 - 05:34:05 692
Summerland 05:19:05 -38.0 Dark Down 65.3 210.4 Up 05:04:05 - 05:34:05 676
Penticton 05:19:04 -38.1 Dark Down 65.3 210.7 Up 05:04:04 - 05:34:04 669
Oliver 05:19:04 -38.3 Dark Down 65.6 211.1 Up 05:04:04 - 05:34:04 633
Anarchist Mountain Observatory 05:19:03 -38.5 Dark Down 65.7 211.7 Up 05:04:03 - 05:34:03 614
Victoria 05:19:27 -36.5 Dark Down 67.3 203.9 Up 05:04:27 - 05:34:27 577
Okanogan 05:19:04 -38.7 Dark Down 66.3 212.0 Up 05:04:04 - 05:34:04 548
Brewster 05:19:05 -38.7 Dark Down 66.6 211.9 Up 05:04:05 - 05:34:05 520
Manson/Chelan 05:19:07 -38.6 Dark Down 66.9 211.4 Up 05:04:07 - 05:34:07 499
Wenatchee 05:19:08 -38.8 Dark Down 67.3 211.7 Up 05:04:08 - 05:34:08 450
Ellensburg 05:19:09 -38.8 Dark Down 67.8 211.7 Up 05:04:09 - 05:34:09 407
Yakima 05:19:09 -39.0 Dark Down 68.1 212.2 Up 05:04:09 - 05:34:09 364
Toppenish/White Swan 05:19:08 -39.2 Dark Down 68.2 212.9 Up 05:04:08 - 05:34:08 341
PNWRO 05:18:59 -40.3 Dark Down 68.0 216.5 Up 05:03:59 - 05:33:59 298
The Dalles 05:19:13 -39.1 Dark Down 69.2 212.2 Up 05:04:13 - 05:34:13 261
Maupin 05:19:12 -39.4 Dark Down 69.5 213.1 Up 05:04:12 - 05:34:12 216
Sisters 05:19:15 -39.5 Dark Down 70.4 213.3 Up 05:04:15 - 05:34:15 124
Bend 05:19:14 -39.7 Dark Down 70.5 214.2 Up 05:04:14 - 05:34:14 98
Oregon Observatory 05:19:14 -39.7 Dark Down 70.7 214.2 Up 05:04:14 - 05:34:14 80
Chiloquin 05:19:17 -40.0 Dark Down 72.0 215.4 Up 05:04:17 - 05:34:17 -59
Klamath Falls 05:19:17 -40.2 Dark Down 72.2 216.3 Up 05:04:17 - 05:34:17 -97
Cedarville 05:19:06 -41.5 Dark Down 72.0 221.5 Up 05:04:06 - 05:34:06 -177
Fall River/Burney 05:19:14 -40.9 Dark Down 73.0 219.5 Up 05:04:14 - 05:34:14 -225
Dunrhomin 05:17:26 -51.6 Dark Down 63.6 249.1 Up 05:02:26 - 05:32:26 -288
Nikitin 05:17:27 -51.7 Dark Down 63.7 249.4 Up 05:02:27 - 05:32:27 -308
CU-SBO 05:17:27 -51.7 Dark Down 63.7 249.5 Up 05:02:27 - 05:32:27 -315
Greenville 05:19:11 -41.6 Dark Down 73.4 222.6 Up 05:04:11 - 05:34:11 -325
Gimple 05:19:11 -41.6 Dark Down 73.4 222.8 Up 05:04:11 - 05:34:11 -326
Quincy 05:19:11 -41.7 Dark Down 73.6 223.1 Up 05:04:11 - 05:34:11 -347
Portola 05:19:08 -42.0 Dark Down 73.4 224.5 Up 05:04:08 - 05:34:08 -363
Reno 05:19:03 -42.6 Dark Down 73.3 226.7 Up 05:04:03 - 05:34:03 -394
Carson City 05:19:03 -42.8 Dark Down 73.5 227.6 Up 05:04:03 - 05:34:03 -433
Yerington 05:18:59 -43.3 Dark Down 73.3 229.6 Up 05:03:59 - 05:33:59 -456
Gardnerville 05:19:03 -42.9 Dark Down 73.6 228.4 Up 05:04:03 - 05:34:03 -460
Hawthorne 05:18:55 -43.8 Dark Down 73.3 232.0 Up 05:03:55 - 05:33:55 -508
Lee Vining 05:18:58 -43.7 Dark Down 73.9 232.4 Up 05:03:58 - 05:33:58 -568
Bishop 05:18:53 -44.5 Dark Down 73.8 235.6 Up 05:03:53 - 05:33:53 -635
Beatty 05:18:42 -45.8 Dark Down 73.0 240.2 Up 05:03:42 - 05:33:42 -689
Patrick 05:18:21 -48.5 Dark Down 71.6 249.1 Up 05:03:21 - 05:33:21 -852
Laughlin/Bullhead City 05:18:26 -48.1 Dark Down 72.2 248.7 Up 05:03:26 - 05:33:26 -880
Lake Havasu City 05:18:24 -48.5 Dark Down 72.2 251.1 Up 05:03:24 - 05:33:24 -954
Wildwood 05:18:54 -45.5 Dark Down 75.6 245.6 Up 05:03:54 - 05:33:54 -995
George/Scottsdale 05:18:05 -50.7 Dark Down 70.5 256.3 Up 05:03:05 - 05:33:05 -1035
Idyllwild 05:18:40 -47.0 Dark Down 74.3 250.0 Up 05:03:40 - 05:33:40 -1037
Calipatria 05:18:32 -48.2 Dark Down 73.6 253.7 Up 05:03:32 - 05:33:32 -1105
Yuma 05:18:25 -49.0 Dark Down 73.0 256.2 Up 05:03:25 - 05:33:25 -1153

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 15875, (2023/02/18 05:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 19.56 173
Alnath         05:26:17.5 +28:36:23  1.6 11.27 143
44Kap Aur      06:15:22.6 +29:29:47  4.3  2.29 154
PPM 095737     06:18:20.7 +27:12:35  7.8  0.31 154
PPM 095711     06:17:20.0 +27:17:26  9.7  0.10 154
15875          06:16:57.1 +27:13:50 16.6       154
Positions are for J2000

Event circumstances last updated at 2023/01/08 03:30:24 UT

Marc W. Buie, Southwest Research Institute

RECON