RECON: TNO occultation with 469362

Event between (469362) 01KB77 and star GA0820:14442694 with event index number of 1706747

Geocentric closest approach at 2027/06/21 11:02:38 UTC

J2000 position of star is 18:50:41.1 -07:05:52
Equinox of date position of star is 18:52:00.3 -07:04:03
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 22 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 28.4 AU from the Sun and 27.5 AU from the Earth.
Apparent velocity is 22.4 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 375 seconds.
The 1-sigma cross-track error in the shadow position is 2330 km.
The sky-plane scale is 19931.5 km/arcsec.

The object has an absolute magnitude Hv=7.7
Diameter=199.5 km assuming a 5% albedo -- 7.7 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469362, (2027/06/21 11:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.8 -26:29:26  0.9 38.74  47
Nunki          18:56:58.0 -26:15:36  2.0 19.23  14
PPM 202138     18:48:56.9 -05:40:24  4.6  1.60  23
PPM 202241     18:53:37.0 -07:13:25  8.4  0.39  21
PPM 202196     18:51:58.3 -06:58:42  8.7  0.10  22
469362         18:52:10.0 -07:03:50 15.7        21
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 2.4 sigma about the mid-time.
The median site spacing is 47.6 km RECON observability=0.1 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)
Sleaford 11:00:54 1.3 Sun up Up 19.0 229.1 Really Low 10:45:54 - 11:15:54 9461
Kamloops 11:01:12 -6.1 NT Up 26.1 215.5 Low 10:46:12 - 11:16:12 9422
Kelowna 11:01:07 -6.4 NT Up 26.4 216.6 Low 10:46:07 - 11:16:07 9371
Peachland 11:01:08 -6.6 NT Up 26.6 216.3 Low 10:46:08 - 11:16:08 9365
Summerland 11:01:08 -6.7 NT Up 26.7 216.5 Low 10:46:08 - 11:16:08 9356
Penticton 11:01:07 -6.7 NT Up 26.7 216.6 Low 10:46:07 - 11:16:07 9352
Oliver 11:01:06 -7.0 NT Up 27.0 216.7 Low 10:46:06 - 11:16:06 9330
Anarchist Mountain Observatory 11:01:06 -7.0 NT Up 27.0 217.0 Low 10:46:06 - 11:16:06 9319
Victoria 11:01:16 -9.1 NT Up 29.0 212.9 Low 10:46:16 - 11:16:16 9298
Okanogan 11:01:05 -7.6 NT Up 27.7 216.9 Low 10:46:05 - 11:16:05 9279
Brewster 11:01:05 -7.9 NT Up 27.9 216.8 Low 10:46:05 - 11:16:05 9262
Manson/Chelan 11:01:05 -8.2 NT Up 28.3 216.5 Low 10:46:05 - 11:16:05 9250
Wenatchee 11:01:05 -8.6 NT Up 28.7 216.5 Low 10:46:05 - 11:16:05 9220
Ellensburg 11:01:05 -9.0 NT Up 29.1 216.4 Low 10:46:05 - 11:16:05 9194
Yakima 11:01:04 -9.4 NT Up 29.5 216.5 Low 10:46:04 - 11:16:04 9167
Toppenish/White Swan 11:01:04 -9.4 NT Up 29.6 216.7 Low 10:46:04 - 11:16:04 9152
PNWRO 11:00:58 -9.1 NT Up 29.2 218.4 Low 10:45:58 - 11:15:58 9124
The Dalles 11:01:04 -10.4 NT Up 30.5 216.2 Up 10:46:04 - 11:16:04 9102
Maupin 11:01:02 -10.7 NT Up 30.8 216.4 Up 10:46:02 - 11:16:02 9074
Sisters 11:01:03 -11.6 NT Up 31.7 216.2 Up 10:46:03 - 11:16:03 9015
Bend 11:01:02 -11.6 NT Up 31.8 216.6 Up 10:46:02 - 11:16:02 8998
Oregon Observatory 11:01:02 -11.8 NT Up 32.0 216.5 Up 10:46:02 - 11:16:02 8987
Chiloquin 11:01:01 -13.0 AT Up 33.3 216.6 Up 10:46:01 - 11:16:01 8894
Klamath Falls 11:01:00 -13.3 AT Up 33.5 216.8 Up 10:46:00 - 11:16:00 8869
Cedarville 11:00:54 -13.0 AT Up 33.3 218.7 Up 10:45:54 - 11:15:54 8814
Fall River/Burney 11:00:56 -14.0 AT Up 34.3 217.7 Up 10:45:56 - 11:15:56 8782
Greenville 11:00:54 -14.5 AT Up 34.8 218.5 Up 10:45:54 - 11:15:54 8713
Gimple 11:00:54 -14.4 AT Up 34.7 218.6 Up 10:45:54 - 11:15:54 8713
Quincy 11:00:54 -14.6 AT Up 34.9 218.6 Up 10:45:54 - 11:15:54 8698
Portola 11:00:54 -14.5 AT Up 34.8 219.2 Up 10:45:54 - 11:15:54 8687
Reno 11:00:54 -14.3 AT Up 34.7 220.0 Up 10:45:54 - 11:15:54 8666
Dunrhomin 11:00:07 -5.7 CT Up 26.1 233.4 Low 10:45:07 - 11:15:07 8656
Nikitin 11:00:07 -5.8 CT Up 26.3 233.5 Low 10:45:07 - 11:15:07 8642
Carson City 11:00:54 -14.6 AT Up 35.0 220.2 Up 10:45:54 - 11:15:54 8638
CU-SBO 11:00:08 -5.9 CT Up 26.3 233.5 Low 10:45:08 - 11:15:08 8638
Yerington 11:00:54 -14.4 AT Up 34.8 220.9 Up 10:45:54 - 11:15:54 8622
Gardnerville 11:00:54 -14.7 AT Up 35.1 220.3 Up 10:45:54 - 11:15:54 8620
Hawthorne 11:00:54 -14.4 AT Up 34.9 221.7 Up 10:45:54 - 11:15:54 8586
Lee Vining 11:00:54 -15.1 AT Up 35.5 221.4 Up 10:45:54 - 11:15:54 8544
Bishop 11:00:54 -15.2 AT Up 35.6 222.5 Up 10:45:54 - 11:15:54 8496
Beatty 11:00:34 -14.6 AT Up 35.1 224.3 Up 10:45:34 - 11:15:34 8448
Patrick 11:00:22 -14.0 AT Up 34.5 227.8 Up 10:45:22 - 11:15:22 8315
Laughlin/Bullhead City 11:00:24 -14.6 AT Up 35.1 227.2 Up 10:45:24 - 11:15:24 8298
Lake Havasu City 11:00:23 -14.9 AT Up 35.4 227.8 Up 10:45:23 - 11:15:23 8241
Wildwood 11:00:36 -17.7 AT Up 38.1 223.8 Up 10:45:36 - 11:15:36 8224
Idyllwild 11:00:29 -16.9 AT Up 37.3 225.9 Up 10:45:29 - 11:15:29 8188
George/Scottsdale 11:00:13 -13.9 AT Up 34.3 230.5 Up 10:45:13 - 11:15:13 8165
Calipatria 11:00:24 -16.6 AT Up 37.0 227.4 Up 10:45:24 - 11:15:24 8131
Yuma 11:00:20 -16.3 AT Up 36.8 228.5 Up 10:45:20 - 11:15:20 8090

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 469362, (2027/06/21 11:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.74  47
Nunki          18:55:15.9 -26:17:49  2.0 19.23  14
PPM 202138     18:47:28.9 -05:42:19  4.6  1.60  23
PPM 202241     18:52:08.0 -07:15:31  8.4  0.39  21
PPM 202196     18:50:29.4 -07:00:44  8.7  0.10  22
469362         18:50:41.1 -07:05:52 15.7        22
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:29:04 UT

Marc W. Buie, Southwest Research Institute

RECON