RECON: TNO occultation with 469506

Event between (469506) 03FF128 and star GA0660:18473612 with event index number of 1690321

Geocentric closest approach at 2027/05/14 09:54:17 UTC

J2000 position of star is 17:44:57.1 -23:10:53
Equinox of date position of star is 17:46:25.3 -23:11:23
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 107 degrees from the moon. Moon is 64% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 31.0 AU from the Sun and 30.2 AU from the Earth.
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 387 seconds.
The 1-sigma cross-track error in the shadow position is 1385 km.
The sky-plane scale is 21885.0 km/arcsec.

The object has an absolute magnitude Hv=6.9
Diameter=254.7 km assuming a 5% albedo -- 13.7 sec chord
Diameter=104.0 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469506, (2027/05/14 09:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.4 -26:29:25  0.9 17.43  90
35Eta Oph      17:11:57.0 -15:45:25  2.6 11.04  99
PPM 267309     17:49:24.9 -22:29:07  6.1  0.96 108
PPM 267163     17:44:00.0 -23:21:37  7.7  0.62 107
PPM 267220     17:46:29.0 -23:19:52  9.4  0.14 107
469506         17:46:36.9 -23:11:27 16.7       108
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 2.3 sigma about the mid-time.
The median site spacing is 16.4 km RECON observability=0.7 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 09:53:55 -9.8 NT Down 14.4 187.8 Really Low 09:38:55 - 10:08:55 10116
Kamloops 09:54:47 -16.1 AT Down 16.0 174.3 Really Low 09:39:47 - 10:09:47 10063
Kelowna 09:54:44 -16.5 AT Down 16.8 175.1 Really Low 09:39:44 - 10:09:44 10041
Peachland 09:54:45 -16.7 AT Down 16.9 174.8 Really Low 09:39:45 - 10:09:45 10036
Summerland 09:54:45 -16.8 AT Down 17.1 174.9 Really Low 09:39:45 - 10:09:45 10032
Penticton 09:54:44 -16.8 AT Down 17.1 175.0 Really Low 09:39:44 - 10:09:44 10030
Oliver 09:54:45 -17.1 AT Down 17.5 175.0 Really Low 09:39:45 - 10:09:45 10018
Anarchist Mountain Observatory 09:54:44 -17.2 AT Down 17.7 175.2 Really Low 09:39:44 - 10:09:44 10013
Okanogan 09:54:45 -17.9 AT Down 18.3 175.0 Really Low 09:39:45 - 10:09:45 9989
Brewster 09:54:46 -18.2 Dark Down 18.6 174.8 Really Low 09:39:46 - 10:09:46 9979
Victoria 09:55:00 -18.9 Dark Down 17.8 171.3 Really Low 09:40:00 - 10:10:00 9976
Manson/Chelan 09:54:48 -18.5 Dark Down 18.7 174.4 Really Low 09:39:48 - 10:09:48 9970
Wenatchee 09:54:49 -18.9 Dark Down 19.2 174.2 Really Low 09:39:49 - 10:09:49 9951
Ellensburg 09:54:50 -19.4 Dark Down 19.6 174.0 Really Low 09:39:50 - 10:09:50 9935
Yakima 09:54:50 -19.7 Dark Down 20.0 174.0 Low 09:39:50 - 10:09:50 9919
Toppenish/White Swan 09:54:50 -19.8 Dark Down 20.2 174.1 Low 09:39:50 - 10:09:50 9912
PNWRO 09:54:44 -19.7 Dark Down 20.7 175.6 Low 09:39:44 - 10:09:44 9903
The Dalles 09:54:53 -20.8 Dark Down 20.9 173.3 Low 09:39:53 - 10:09:53 9877
Maupin 09:54:53 -21.1 Dark Down 21.4 173.4 Low 09:39:53 - 10:09:53 9860
Sisters 09:54:55 -22.1 Dark Down 22.2 172.9 Low 09:39:55 - 10:09:55 9821
Bend 09:54:53 -22.2 Dark Down 22.5 173.1 Low 09:39:53 - 10:09:53 9812
Oregon Observatory 09:54:55 -22.4 Dark Down 22.6 173.0 Low 09:39:55 - 10:09:55 9804
Chiloquin 09:54:57 -23.7 Dark Down 23.9 172.5 Low 09:39:57 - 10:09:57 9743
Klamath Falls 09:54:56 -23.9 Dark Down 24.2 172.6 Low 09:39:56 - 10:09:56 9727
Cedarville 09:54:50 -24.0 Dark Down 25.1 174.1 Low 09:39:50 - 10:09:50 9703
Fall River/Burney 09:54:55 -24.8 Dark Down 25.4 172.9 Low 09:39:55 - 10:09:55 9673
Dunrhomin 09:53:45 -18.2 Dark Down 26.0 189.2 Low 09:38:45 - 10:08:45 9651
Nikitin 09:53:44 -18.3 Dark Down 26.2 189.2 Low 09:38:44 - 10:08:44 9642
CU-SBO 09:53:44 -18.4 Dark Down 26.3 189.1 Low 09:38:44 - 10:08:44 9639
Gimple 09:54:54 -25.4 Dark Down 26.4 173.4 Low 09:39:54 - 10:09:54 9631
Greenville 09:54:54 -25.4 Dark Down 26.4 173.3 Low 09:39:54 - 10:09:54 9631
Quincy 09:54:55 -25.6 Dark Down 26.6 173.3 Low 09:39:55 - 10:09:55 9621
Portola 09:54:52 -25.5 Dark Down 26.8 173.7 Low 09:39:52 - 10:09:52 9617
Reno 09:54:49 -25.5 Dark Down 27.1 174.4 Low 09:39:49 - 10:09:49 9607
Carson City 09:54:50 -25.8 Dark Down 27.4 174.4 Low 09:39:50 - 10:09:50 9588
Yerington 09:54:47 -25.7 Dark Down 27.7 175.0 Low 09:39:47 - 10:09:47 9581
Gardnerville 09:54:50 -26.0 Dark Down 27.7 174.4 Low 09:39:50 - 10:09:50 9576
Hawthorne 09:54:44 -25.9 Dark Down 28.2 175.6 Low 09:39:44 - 10:09:44 9559
Lee Vining 09:54:47 -26.6 Dark Down 28.7 175.0 Low 09:39:47 - 10:09:47 9527
Bishop 09:54:43 -26.8 Dark Down 29.3 175.7 Low 09:39:43 - 10:09:43 9497
Beatty 09:54:36 -26.4 Dark Down 29.9 177.4 Low 09:39:36 - 10:09:36 9478
Patrick 09:54:23 -26.3 Dark Down 31.4 180.4 Up 09:39:23 - 10:09:23 9400
Laughlin/Bullhead City 09:54:26 -26.8 Dark Down 31.7 179.7 Up 09:39:26 - 10:09:26 9384
Lake Havasu City 09:54:24 -27.2 Dark Down 32.3 180.0 Up 09:39:24 - 10:09:24 9345
Wildwood 09:54:45 -29.6 Dark Down 32.6 175.4 Up 09:39:45 - 10:09:45 9308
George/Scottsdale 09:54:13 -26.6 Dark Down 33.1 182.6 Up 09:39:13 - 10:09:13 9301
Idyllwild 09:54:37 -29.0 Dark Down 33.0 177.4 Up 09:39:37 - 10:09:37 9294
Calipatria 09:54:31 -28.9 Dark Down 33.7 178.7 Up 09:39:31 - 10:09:31 9259
Yuma 09:54:26 -28.8 Dark Down 34.1 179.6 Up 09:39:26 - 10:09:26 9235

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 469506, (2027/05/14 09:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.43  90
35Eta Oph      17:10:22.7 -15:43:29  2.6 11.04  99
PPM 267309     17:47:45.6 -22:28:40  6.1  0.96 108
PPM 267163     17:42:20.1 -23:20:56  7.7  0.62 107
PPM 267220     17:44:49.1 -23:19:18  9.4  0.14 107
469506         17:44:57.1 -23:10:53 16.7       107
Positions are for J2000

Event circumstances last updated at 2024/03/06 04:20:07 UT

Marc W. Buie, Southwest Research Institute

RECON