RECON: TNO occultation with 523715

Event between (523715) 14KU101 and star GA0680:06530641 with event index number of 2331400

Geocentric closest approach at 2027/06/27 05:03:43 UTC

J2000 position of star is 15:53:17.5 -20:10:47
Equinox of date position of star is 15:54:43.0 -20:15:03
Stellar brightness G=14.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 50% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 37.7 AU from the Sun and 36.8 AU from the Earth.
Apparent velocity is 19.3 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 116 seconds.
The 1-sigma cross-track error in the shadow position is 1527 km.
The sky-plane scale is 26717.1 km/arcsec.

The object has an absolute magnitude Hv=6.2
Diameter=332.7 km assuming a 5% albedo -- 17.6 sec chord
Diameter=135.8 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523715, (2027/06/27 05:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.8 -26:29:26  0.9 10.38 116
8Bet1Sco       16:07:02.4 -19:52:42  2.6  2.88 122
45Lam Lib      15:54:56.1 -20:14:50  5.0  0.02 125
PPM 264780     15:53:06.1 -20:40:05  8.1  0.59 125
45Lam Lib      15:54:56.1 -20:14:50  5.0  0.02 125
523715         15:54:53.6 -20:15:35 14.4       124
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 13.1 km RECON observability=0.4 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:04:17 -10.0 NT Down 17.5 186.8 Really Low 04:54:05 - 05:14:28 4126
Kamloops 05:05:06 -6.1 NT Down 18.9 172.7 Really Low 04:54:54 - 05:15:17 3897
Kelowna 05:05:04 -7.1 NT Down 19.7 173.6 Really Low 04:54:52 - 05:15:15 3880
Peachland 05:05:04 -7.1 NT Down 19.8 173.3 Really Low 04:54:53 - 05:15:16 3871
Summerland 05:05:04 -7.2 NT Down 20.0 173.4 Really Low 04:54:52 - 05:15:15 3866
Penticton 05:05:04 -7.3 NT Down 20.0 173.5 Low 04:54:53 - 05:15:16 3865
Oliver 05:05:03 -7.6 NT Down 20.4 173.5 Low 04:54:52 - 05:15:15 3851
Anarchist Mountain Observatory 05:05:02 -7.8 NT Down 20.6 173.6 Low 04:54:51 - 05:15:14 3848
Okanogan 05:05:04 -8.2 NT Down 21.2 173.4 Low 04:54:53 - 05:15:16 3817
Brewster 05:05:04 -8.3 NT Down 21.5 173.2 Low 04:54:53 - 05:15:16 3802
Manson/Chelan 05:05:06 -8.3 NT Down 21.6 172.8 Low 04:54:54 - 05:15:17 3787
Wenatchee 05:05:07 -8.6 NT Down 22.1 172.6 Low 04:54:55 - 05:15:18 3764
Victoria 05:05:18 -6.4 NT Down 20.7 169.6 Low 04:55:07 - 05:15:30 3760
Ellensburg 05:05:08 -8.8 NT Down 22.5 172.4 Low 04:54:56 - 05:15:19 3742
PNWRO 05:05:02 -10.3 NT Down 23.6 174.0 Low 04:54:50 - 05:15:13 3725
Yakima 05:05:08 -9.1 NT Down 22.9 172.3 Low 04:54:56 - 05:15:19 3724
Toppenish/White Swan 05:05:08 -9.3 NT Down 23.1 172.5 Low 04:54:56 - 05:15:19 3717
The Dalles 05:05:11 -9.6 NT Down 23.8 171.7 Low 04:54:59 - 05:15:22 3667
Maupin 05:05:10 -9.9 NT Down 24.2 171.7 Low 04:54:59 - 05:15:22 3649
Dunrhomin 05:04:03 -20.6 Dark Down 29.2 188.2 Low 04:53:52 - 05:14:15 3636
Nikitin 05:04:03 -20.7 Dark Down 29.3 188.2 Low 04:53:51 - 05:14:14 3626
CU-SBO 05:04:04 -20.8 Dark Down 29.4 188.1 Low 04:53:52 - 05:14:15 3622
Sisters 05:05:12 -10.4 NT Down 25.1 171.2 Low 04:55:00 - 05:15:23 3598
Bend 05:05:11 -10.7 NT Down 25.3 171.4 Low 04:54:59 - 05:15:22 3591
Oregon Observatory 05:05:12 -10.7 NT Down 25.5 171.3 Low 04:55:00 - 05:15:23 3580
Chiloquin 05:05:14 -11.5 NT Down 26.7 170.8 Low 04:55:02 - 05:15:25 3505
Klamath Falls 05:05:13 -11.8 NT Down 27.1 170.8 Low 04:55:02 - 05:15:25 3489
Cedarville 05:05:07 -13.1 AT Down 27.9 172.4 Low 04:54:55 - 05:15:18 3481
Fall River/Burney 05:05:12 -12.8 AT Down 28.3 171.1 Low 04:55:00 - 05:15:23 3432
Gimple 05:05:10 -13.8 AT Down 29.2 171.6 Low 04:54:59 - 05:15:22 3392
Greenville 05:05:10 -13.7 AT Down 29.2 171.5 Low 04:54:58 - 05:15:21 3390
Portola 05:05:08 -14.2 AT Down 29.6 172.0 Low 04:54:56 - 05:15:19 3381
Quincy 05:05:09 -13.9 AT Down 29.4 171.5 Low 04:54:58 - 05:15:21 3379
Reno 05:05:06 -14.8 AT Down 29.9 172.7 Low 04:54:54 - 05:15:17 3378
Yerington 05:05:03 -15.5 AT Down 30.6 173.3 Up 04:54:52 - 05:15:15 3359
Carson City 05:05:05 -15.0 AT Down 30.3 172.7 Up 04:54:54 - 05:15:17 3358
Gardnerville 05:05:05 -15.2 AT Down 30.5 172.7 Up 04:54:54 - 05:15:17 3345
Hawthorne 05:05:00 -16.1 AT Down 31.1 173.8 Up 04:54:49 - 05:15:12 3342
Lee Vining 05:05:01 -16.3 AT Down 31.6 173.3 Up 04:54:50 - 05:15:13 3300
Beatty 05:04:52 -18.3 Dark Down 32.8 175.8 Up 04:54:41 - 05:15:04 3279
Bishop 05:04:59 -17.1 AT Down 32.2 174.0 Up 04:54:48 - 05:15:11 3277
Patrick 05:04:38 -20.9 Dark Down 34.4 178.9 Up 04:54:26 - 05:14:49 3238
Laughlin/Bullhead City 05:04:40 -20.7 Dark Down 34.6 178.1 Up 04:54:29 - 05:14:52 3210
Lake Havasu City 05:04:39 -21.4 Dark Down 35.3 178.4 Up 04:54:28 - 05:14:51 3172
George/Scottsdale 05:04:27 -23.2 Dark Down 36.1 181.2 Up 04:54:16 - 05:14:39 3164
Idyllwild 05:04:51 -20.7 Dark Down 36.0 175.7 Up 04:54:39 - 05:15:02 3082
Wildwood 05:04:59 -19.5 Dark Down 35.5 173.6 Up 04:54:48 - 05:15:11 3069
Calipatria 05:04:44 -21.8 Dark Down 36.6 177.0 Up 04:54:33 - 05:14:56 3062
Yuma 05:04:40 -22.6 Dark Down 37.1 178.0 Up 04:54:28 - 05:14:51 3050

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 523715, (2027/06/27 05:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.38 116
8Bet1Sco       16:05:26.2 -19:48:20  2.6  2.88 122
45Lam Lib      15:53:20.0 -20:10:02  5.0  0.02 125
PPM 264780     15:51:29.9 -20:35:14  8.1  0.59 125
45Lam Lib      15:53:20.0 -20:10:02  5.0  0.02 125
523715         15:53:17.5 -20:10:47 14.4       125
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:29:23 UT

Marc W. Buie, Southwest Research Institute

RECON