RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0900:13750343 with event index number of 2624362

Geocentric closest approach at 2028/07/19 06:01:19 UTC

J2000 position of star is 19:33:57.4 +01:01:10
Equinox of date position of star is 19:35:12.2 +01:04:27
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 136 degrees from the moon. Moon is 11% illuminated.
Apparent brightness V=22.3

[RECON map]
Object is 20.7 AU from the Sun and 19.7 AU from the Earth.
Apparent velocity is 22.9 km/sec on the sky relative to the star, or, 5.8 arcsec/hr.
The 1-sigma error in the time of the event is 232 seconds.
The 1-sigma cross-track error in the shadow position is 1927 km.
The sky-plane scale is 14293.4 km/arcsec.

The object has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.9 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523686, (2028/07/19 06:01UT)
Object            RA         Dec     mag  sep  mel
Tarazed        19:47:37.0 +10:41:05  2.7 10.07 127
45 Aql         19:42:11.5 -00:33:10  6.5  2.36 136
PPM 168216     19:37:28.6 +00:18:52  7.3  0.93 136
PPM 168172     19:36:16.5 +01:19:15  9.5  0.32 136
523686         19:35:24.6 +01:05:00 16.7       136
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 3.9 sigma about the mid-time.
The median site spacing is 27.2 km RECON observability=0.9 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:01:58 -13.4 AT Down 35.8 147.6 Up 05:46:58 - 06:16:58 9053
Kelowna 06:01:58 -14.4 AT Down 36.7 148.3 Up 05:46:58 - 06:16:58 8989
Peachland 06:01:59 -14.4 AT Down 36.7 147.9 Up 05:46:59 - 06:16:59 8986
Summerland 06:01:59 -14.5 AT Down 36.9 148.0 Up 05:46:59 - 06:16:59 8975
Penticton 06:01:59 -14.6 AT Down 37.0 148.1 Up 05:46:59 - 06:16:59 8969
Sleaford 06:01:16 -15.6 AT Down 38.0 165.3 Up 05:46:16 - 06:16:16 8968
Victoria 06:02:12 -14.2 AT Down 36.4 143.2 Up 05:47:12 - 06:17:12 8949
Oliver 06:02:00 -14.9 AT Down 37.3 147.9 Up 05:47:00 - 06:17:00 8946
Anarchist Mountain Observatory 06:01:59 -15.2 AT Down 37.5 148.1 Up 05:46:59 - 06:16:59 8932
Okanogan 06:02:01 -15.7 AT Down 38.0 147.6 Up 05:47:01 - 06:17:01 8891
Brewster 06:02:03 -15.8 AT Down 38.1 147.2 Up 05:47:03 - 06:17:03 8875
Manson/Chelan 06:02:04 -15.9 AT Down 38.2 146.7 Up 05:47:04 - 06:17:04 8866
Wenatchee 06:02:06 -16.2 AT Down 38.5 146.3 Up 05:47:06 - 06:17:06 8835
Ellensburg 06:02:07 -16.5 AT Down 38.8 145.9 Up 05:47:07 - 06:17:07 8810
Yakima 06:02:08 -16.9 AT Down 39.1 145.7 Up 05:47:08 - 06:17:08 8782
Toppenish/White Swan 06:02:08 -17.1 AT Down 39.3 145.8 Up 05:47:08 - 06:17:08 8764
The Dalles 06:02:12 -17.5 AT Down 39.7 144.5 Up 05:47:12 - 06:17:12 8719
PNWRO 06:02:04 -17.9 AT Down 40.2 147.4 Up 05:47:04 - 06:17:04 8718
Maupin 06:02:13 -17.9 AT Down 40.1 144.4 Up 05:47:13 - 06:17:13 8688
Sisters 06:02:16 -18.5 Dark Down 40.6 143.4 Up 05:47:16 - 06:17:16 8631
Bend 06:02:15 -18.8 Dark Down 40.9 143.6 Up 05:47:15 - 06:17:15 8610
Oregon Observatory 06:02:16 -18.9 Dark Down 41.0 143.3 Up 05:47:16 - 06:17:16 8599
Chiloquin 06:02:20 -19.8 Dark Down 41.8 142.2 Up 05:47:20 - 06:17:20 8507
Klamath Falls 06:02:21 -20.1 Dark Down 42.1 142.1 Up 05:47:21 - 06:17:21 8480
Cedarville 06:02:18 -21.4 Dark Down 43.4 143.6 Up 05:47:18 - 06:17:18 8404
Fall River/Burney 06:02:22 -21.3 Dark Down 43.2 141.9 Up 05:47:22 - 06:17:22 8384
Greenville 06:02:22 -22.2 Dark Down 44.2 141.9 Up 05:47:22 - 06:17:22 8306
Gimple 06:02:22 -22.3 Dark Down 44.2 142.0 Up 05:47:22 - 06:17:22 8305
Quincy 06:02:23 -22.4 Dark Down 44.3 141.8 Up 05:47:23 - 06:17:23 8290
Portola 06:02:22 -22.7 Dark Down 44.7 142.3 Up 05:47:22 - 06:17:22 8274
Reno 06:02:20 -23.2 Dark Down 45.2 142.9 Up 05:47:20 - 06:17:20 8243
Carson City 06:02:21 -23.5 Dark Down 45.5 142.7 Up 05:47:21 - 06:17:21 8214
Gardnerville 06:02:21 -23.7 Dark Down 45.7 142.6 Up 05:47:21 - 06:17:21 8193
Yerington 06:02:19 -23.9 Dark Down 45.9 143.4 Up 05:47:19 - 06:17:19 8189
Hawthorne 06:02:18 -24.5 Dark Down 46.5 143.8 Up 05:47:18 - 06:17:18 8143
Lee Vining 06:02:21 -24.8 Dark Down 46.8 142.8 Up 05:47:21 - 06:17:21 8105
Dunrhomin 06:01:29 -27.1 Dark Down 49.6 163.3 Up 05:46:29 - 06:16:29 8080
Nikitin 06:01:29 -27.3 Dark Down 49.7 163.2 Up 05:46:29 - 06:16:29 8065
CU-SBO 06:01:29 -27.3 Dark Down 49.8 163.1 Up 05:46:29 - 06:16:29 8061
Bishop 06:02:20 -25.6 Dark Down 47.6 143.4 Up 05:47:20 - 06:17:20 8044
Beatty 06:02:15 -26.7 Dark Down 48.7 145.2 Up 05:47:15 - 06:17:15 7980
Patrick 06:02:07 -29.1 Dark Down 51.2 148.2 Up 05:47:07 - 06:17:07 7808
Laughlin/Bullhead City 06:02:10 -29.0 Dark Down 51.1 147.1 Up 05:47:10 - 06:17:10 7798
Wildwood 06:02:26 -28.4 Dark Down 50.1 140.8 Up 05:47:26 - 06:17:26 7769
Lake Havasu City 06:02:11 -29.7 Dark Down 51.8 147.0 Up 05:47:11 - 06:17:11 7735
Idyllwild 06:02:21 -29.5 Dark Down 51.3 143.1 Up 05:47:21 - 06:17:21 7708
Calipatria 06:02:17 -30.5 Dark Down 52.4 144.3 Up 05:47:17 - 06:17:17 7634
George/Scottsdale 06:02:02 -31.3 Dark Down 53.5 150.1 Up 05:47:02 - 06:17:02 7627
Yuma 06:02:14 -31.2 Dark Down 53.2 145.2 Up 05:47:14 - 06:17:14 7581

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 523686, (2028/07/19 06:01UT)
Object            RA         Dec     mag  sep  mel
Tarazed        19:46:15.6 +10:36:48  2.7 10.07 127
45 Aql         19:40:43.4 -00:37:16  6.5  2.36 136
PPM 168216     19:36:01.0 +00:14:57  7.3  0.93 136
PPM 168172     19:34:49.5 +01:15:23  9.5  0.32 136
523686         19:33:57.4 +01:01:10 16.7       136
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:33:16 UT

Marc W. Buie, Southwest Research Institute

RECON