RECON: TNO occultation with 310071

Event between (310071) 10KR59 and star GA0560:18492018 with event index number of 2188371

Geocentric closest approach at 2027/04/12 12:09:23 UTC

J2000 position of star is 17:09:45.4 -33:30:10
Equinox of date position of star is 17:11:20.6 -33:31:54
Stellar brightness G=13.6, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 165 degrees from the moon. Moon is 34% illuminated.
Apparent brightness V=21.7

[RECON map]
Object is 23.5 AU from the Sun and 22.9 AU from the Earth.
Apparent velocity is 12.0 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 143 seconds.
The 1-sigma cross-track error in the shadow position is 1247 km.
The sky-plane scale is 16623.4 km/arcsec.

The object has an absolute magnitude Hv=7.8
Diameter=163.7 km assuming a 5% albedo -- 13.6 sec chord
Diameter=66.8 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 310071, (2027/04/12 12:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.1 -26:29:24  0.9 11.23 157
26Eps Sco      16:51:56.4 -34:20:23  2.3  4.15 160
PPM 296090     17:17:06.9 -33:34:38  5.6  1.16 166
PPM 296038     17:14:34.5 -33:23:30  8.2  0.65 165
PPM 295977     17:11:08.9 -33:31:56  8.8  0.08 164
310071         17:11:32.9 -33:32:07 13.6       165
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 0.0 km RECON observability=0.1 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 12:05:31 -13.6 AT Down 8.0 180.8 Really Low 11:53:09 - 12:17:54 5469
Kamloops 12:05:15 -10.9 NT Down 5.8 183.3 Really Low 11:52:53 - 12:17:38 5399
Peachland 12:05:12 -11.0 NT Down 6.6 183.8 Really Low 11:52:49 - 12:17:34 5366
Summerland 12:05:12 -11.0 NT Down 6.8 183.9 Really Low 11:52:50 - 12:17:35 5361
Kelowna 12:05:10 -10.8 NT Down 6.5 184.1 Really Low 11:52:47 - 12:17:32 5358
Penticton 12:05:11 -11.0 NT Down 6.9 184.0 Really Low 11:52:49 - 12:17:34 5356
Oliver 12:05:11 -11.2 NT Down 7.2 184.0 Really Low 11:52:49 - 12:17:34 5351
Manson/Chelan 12:05:14 -12.1 AT Down 8.5 183.5 Really Low 11:52:52 - 12:17:37 5350
Ellensburg 12:05:17 -12.7 AT Down 9.4 183.2 Really Low 11:52:55 - 12:17:40 5348
Wenatchee 12:05:16 -12.4 AT Down 9.0 183.4 Really Low 11:52:54 - 12:17:39 5347
The Dalles 12:05:21 -13.8 AT Down 10.8 182.7 Really Low 11:52:59 - 12:17:44 5343
Anarchist Mountain Observatory 12:05:10 -11.1 NT Down 7.4 184.2 Really Low 11:52:47 - 12:17:32 5342
Brewster 12:05:13 -11.8 NT Down 8.3 183.8 Really Low 11:52:51 - 12:17:36 5341
Yakima 12:05:17 -12.9 AT Down 9.8 183.2 Really Low 11:52:55 - 12:17:40 5341
Okanogan 12:05:11 -11.6 NT Down 8.0 184.0 Really Low 11:52:49 - 12:17:34 5338
Maupin 12:05:20 -13.9 AT Down 11.3 182.8 Really Low 11:52:58 - 12:17:43 5330
Toppenish/White Swan 12:05:16 -13.0 AT Down 10.0 183.3 Really Low 11:52:54 - 12:17:39 5330
Sisters 12:05:23 -14.6 AT Down 12.2 182.4 Really Low 11:53:01 - 12:17:46 5329
Oregon Observatory 12:05:24 -14.8 AT Down 12.6 182.5 Really Low 11:53:01 - 12:17:46 5315
Bend 12:05:22 -14.6 AT Down 12.4 182.6 Really Low 11:53:00 - 12:17:45 5315
Chiloquin 12:05:27 -15.6 AT Down 13.9 182.2 Really Low 11:53:05 - 12:17:50 5299
Klamath Falls 12:05:27 -15.7 AT Down 14.2 182.2 Really Low 11:53:04 - 12:17:49 5287
PNWRO 12:05:07 -12.2 AT Down 10.3 184.6 Really Low 11:52:45 - 12:17:30 5268
Fall River/Burney 12:05:25 -16.0 AT Down 15.4 182.6 Really Low 11:53:02 - 12:17:47 5241
Cedarville 12:05:19 -15.0 AT Down 14.9 183.6 Really Low 11:52:57 - 12:17:42 5207
Greenville 12:05:23 -16.2 AT Down 16.3 183.0 Really Low 11:53:01 - 12:17:46 5197
Gimple 12:05:23 -16.1 AT Down 16.3 183.0 Really Low 11:53:01 - 12:17:46 5194
Quincy 12:05:24 -16.2 AT Down 16.5 183.0 Really Low 11:53:02 - 12:17:47 5191
Portola 12:05:22 -16.0 AT Down 16.6 183.4 Really Low 11:53:00 - 12:17:45 5169
Reno 12:05:17 -15.7 AT Down 16.8 183.9 Really Low 11:52:55 - 12:17:40 5134
Carson City 12:05:18 -15.8 AT Down 17.2 184.0 Really Low 11:52:56 - 12:17:41 5122
Gardnerville 12:05:18 -15.9 AT Down 17.4 184.0 Really Low 11:52:55 - 12:17:40 5112
Yerington 12:05:13 -15.4 AT Down 17.3 184.5 Really Low 11:52:51 - 12:17:36 5090
Lee Vining 12:05:15 -15.8 AT Down 18.4 184.6 Really Low 11:52:53 - 12:17:38 5054
Hawthorne 12:05:12 -15.3 AT Down 17.8 185.0 Really Low 11:52:49 - 12:17:34 5053
Bishop 12:05:09 -15.6 AT Down 18.9 185.2 Really Low 11:52:47 - 12:17:32 5002
Beatty 12:05:01 -14.6 AT Down 19.2 186.6 Really Low 11:52:39 - 12:17:24 4915
Sleaford 12:04:07 -2.2 CT Down 3.0 195.1 Really Low 11:51:44 - 12:16:29 4903
Wildwood 12:05:16 -17.0 AT Down 22.2 185.2 Low 11:52:54 - 12:17:39 4886
Idyllwild 12:05:04 -15.8 AT Down 22.4 186.8 Low 11:52:41 - 12:17:26 4788
Laughlin/Bullhead City 12:04:49 -13.7 AT Down 20.7 188.6 Low 11:52:26 - 12:17:11 4749
Patrick 12:04:44 -13.0 AT Down 20.4 189.2 Low 11:52:22 - 12:17:07 4726
Lake Havasu City 12:04:48 -13.7 AT Down 21.4 188.9 Low 11:52:25 - 12:17:10 4709
Calipatria 12:04:57 -15.1 AT Down 22.9 187.9 Low 11:52:34 - 12:17:19 4706
Yuma 12:04:52 -14.6 AT Down 23.2 188.7 Low 11:52:29 - 12:17:14 4645
George/Scottsdale 12:04:32 -12.1 AT Down 21.8 191.0 Low 11:52:10 - 12:16:55 4558
Dunrhomin 12:03:54 -5.2 CT Down 14.2 196.1 Really Low 11:51:32 - 12:16:17 4510
CU-SBO 12:03:54 -5.3 CT Down 14.5 196.1 Really Low 11:51:31 - 12:16:16 4505
Nikitin 12:03:52 -5.2 CT Down 14.4 196.1 Really Low 11:51:29 - 12:16:14 4504

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 310071, (2027/04/12 12:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.23 157
26Eps Sco      16:50:08.8 -34:17:41  2.3  4.15 160
PPM 296090     17:15:19.2 -33:32:54  5.6  1.16 166
PPM 296038     17:12:47.1 -33:21:40  8.2  0.65 165
PPM 295977     17:09:21.5 -33:29:59  8.8  0.08 164
310071         17:09:45.4 -33:30:10 13.6       165
Positions are for J2000

Event circumstances last updated at 2024/03/05 05:11:01 UT

Marc W. Buie, Southwest Research Institute

RECON