RECON: TNO occultation with 523695

Event between (523695) 14GS53 and star GA0820:05043182 with event index number of 2242058

Geocentric closest approach at 2028/04/11 11:10:07 UTC

J2000 position of star is 16:16:13.2 -06:27:08
Equinox of date position of star is 16:17:31.8 -06:30:41
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 24 degrees from the moon. Moon is 94% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 35.6 AU from the Sun and 34.9 AU from the Earth.
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is 1415 km.
The sky-plane scale is 25322.6 km/arcsec.

The object has an absolute magnitude Hv=6.4
Diameter=302.0 km assuming a 5% albedo -- 17.7 sec chord
Diameter=123.3 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523695, (2028/04/11 11:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:08.8 -26:29:32  0.9 20.23  20
1Del Oph       16:15:49.8 -03:45:53  2.7  2.80  25
2Eps Oph       16:19:49.2 -04:45:34  3.2  1.84  25
PPM 199494     16:19:08.9 -06:11:56  8.3  0.48  24
PPM 199468     16:17:34.0 -06:39:58  9.2  0.15  24
523695         16:17:44.0 -06:31:14 16.6        24
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 14.7 km RECON observability=0.9 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)
Sleaford 11:11:13 -9.8 NT Up 29.5 200.7 Low 11:01:25 - 11:21:01 10141
Kamloops 11:12:00 -18.0 AT Up 32.8 184.5 Up 11:02:12 - 11:21:48 9677
Kelowna 11:11:53 -18.1 Dark Up 33.5 185.5 Up 11:02:05 - 11:21:41 9661
Peachland 11:11:55 -18.3 Dark Up 33.7 185.2 Up 11:02:07 - 11:21:43 9646
Summerland 11:11:56 -18.3 Dark Up 33.8 185.3 Up 11:02:08 - 11:21:44 9641
Penticton 11:11:55 -18.3 Dark Up 33.9 185.5 Up 11:02:07 - 11:21:43 9640
Oliver 11:11:53 -18.5 Dark Up 34.2 185.5 Up 11:02:05 - 11:21:41 9621
Anarchist Mountain Observatory 11:11:54 -18.5 Dark Up 34.4 185.7 Up 11:02:06 - 11:21:42 9618
Okanogan 11:11:53 -19.1 Dark Up 35.0 185.5 Up 11:02:05 - 11:21:41 9576
Dunrhomin 11:10:37 -14.7 AT Up 40.2 204.6 Up 11:00:49 - 11:20:25 9560
Brewster 11:11:54 -19.3 Dark Up 35.3 185.3 Up 11:02:06 - 11:21:42 9554
Nikitin 11:10:37 -14.8 AT Up 40.4 204.6 Up 11:00:49 - 11:20:25 9548
CU-SBO 11:10:36 -14.9 AT Up 40.5 204.5 Up 11:00:48 - 11:20:24 9542
Manson/Chelan 11:11:54 -19.6 Dark Up 35.6 184.8 Up 11:02:06 - 11:21:42 9531
Wenatchee 11:11:56 -20.0 Dark Up 36.0 184.7 Up 11:02:08 - 11:21:44 9499
Ellensburg 11:11:53 -20.4 Dark Up 36.5 184.4 Up 11:02:05 - 11:21:41 9468
Victoria 11:12:07 -20.9 Dark Up 35.0 180.9 Up 11:02:19 - 11:21:55 9466
PNWRO 11:11:45 -20.2 Dark Up 37.3 186.5 Up 11:01:57 - 11:21:33 9463
Yakima 11:11:53 -20.7 Dark Up 36.9 184.4 Up 11:02:05 - 11:21:41 9444
Toppenish/White Swan 11:11:52 -20.7 Dark Up 37.1 184.6 Up 11:02:04 - 11:21:40 9436
The Dalles 11:11:56 -21.6 Dark Up 37.9 183.7 Up 11:02:08 - 11:21:44 9364
Maupin 11:11:53 -21.9 Dark Up 38.3 183.8 Up 11:02:05 - 11:21:41 9343
Sisters 11:11:53 -22.7 Dark Up 39.2 183.3 Up 11:02:05 - 11:21:41 9272
Bend 11:11:52 -22.7 Dark Up 39.4 183.6 Up 11:02:04 - 11:21:40 9266
Oregon Observatory 11:11:51 -22.9 Dark Up 39.6 183.4 Up 11:02:03 - 11:21:39 9251
Chiloquin 11:11:49 -23.9 Dark Up 40.9 182.9 Up 11:02:01 - 11:21:37 9153
Cedarville 11:11:41 -23.6 Dark Up 41.9 185.2 Up 11:01:53 - 11:21:29 9143
Klamath Falls 11:11:50 -24.1 Dark Up 41.3 183.1 Up 11:02:02 - 11:21:38 9133
Fall River/Burney 11:11:45 -24.6 Dark Up 42.4 183.6 Up 11:01:57 - 11:21:33 9069
Gimple 11:11:43 -24.9 Dark Up 43.3 184.4 Up 11:01:55 - 11:21:31 9026
Greenville 11:11:44 -24.9 Dark Up 43.3 184.3 Up 11:01:56 - 11:21:32 9023
Reno 11:11:37 -24.6 Dark Up 43.8 185.8 Up 11:01:49 - 11:21:25 9023
Portola 11:11:42 -24.8 Dark Up 43.6 184.9 Up 11:01:54 - 11:21:30 9018
Quincy 11:11:41 -25.1 Dark Up 43.5 184.3 Up 11:01:53 - 11:21:29 9010
Yerington 11:11:31 -24.5 Dark Up 44.3 186.8 Up 11:01:43 - 11:21:19 9009
Carson City 11:11:35 -24.8 Dark Up 44.2 185.9 Up 11:01:47 - 11:21:23 8999
Hawthorne 11:11:29 -24.5 Dark Up 44.7 187.5 Up 11:01:41 - 11:21:17 8996
Gardnerville 11:11:34 -24.9 Dark Up 44.4 186.0 Up 11:01:46 - 11:21:22 8984
Beatty 11:11:17 -24.2 Dark Up 46.1 190.4 Up 11:01:29 - 11:21:05 8950
Patrick 11:11:00 -23.0 Dark Up 47.1 194.7 Up 11:01:12 - 11:20:48 8950
Lee Vining 11:11:28 -25.1 Dark Up 45.4 186.9 Up 11:01:40 - 11:21:16 8940
Bishop 11:11:26 -25.0 Dark Up 45.9 188.0 Up 11:01:38 - 11:21:14 8924
Laughlin/Bullhead City 11:11:02 -23.6 Dark Up 47.5 193.8 Up 11:01:14 - 11:20:50 8907
George/Scottsdale 11:10:47 -22.4 Dark Up 48.3 198.1 Up 11:00:59 - 11:20:35 8902
Lake Havasu City 11:11:02 -23.8 Dark Up 48.1 194.3 Up 11:01:14 - 11:20:50 8868
Yuma 11:10:56 -24.9 Dark Up 49.9 194.3 Up 11:01:08 - 11:20:44 8725
Idyllwild 11:11:09 -25.9 Dark Up 49.2 191.0 Up 11:01:21 - 11:20:57 8725
Calipatria 11:11:02 -25.3 Dark Up 49.6 192.9 Up 11:01:14 - 11:20:50 8723
Wildwood 11:11:17 -27.0 Dark Up 49.1 188.2 Up 11:01:29 - 11:21:05 8680

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 523695, (2028/04/11 11:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.23  20
1Del Oph       16:14:20.7 -03:41:43  2.7  2.80  25
2Eps Oph       16:18:19.4 -04:41:32  3.2  1.84  25
PPM 199494     16:17:38.3 -06:07:53  8.3  0.48  24
PPM 199468     16:16:03.1 -06:35:51  9.2  0.15  24
523695         16:16:13.2 -06:27:08 16.6        24
Positions are for J2000

Event circumstances last updated at 2024/06/23 21:29:55 UT

Marc W. Buie, Southwest Research Institute

RECON