RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0720:24065904 with event index number of 2286270

Geocentric closest approach at 2027/08/05 08:25:39 UTC

J2000 position of star is 18:32:11.6 -16:59:23
Equinox of date position of star is 18:33:36.7 -16:58:13
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 104 degrees from the moon. Moon is 12% illuminated.
Apparent brightness V=20.2

[RECON map]
Object is 11.3 AU from the Sun and 10.5 AU from the Earth.
Apparent velocity is 15.7 km/sec on the sky relative to the star, or, 7.4 arcsec/hr.
The 1-sigma error in the time of the event is 70 seconds.
The 1-sigma cross-track error in the shadow position is 604 km.
The sky-plane scale is 7589.7 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 4.8 sec chord
Diameter=28.9 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 459865, (2027/08/05 08:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.2 -26:29:27  0.9 29.95  76
Nunki          18:56:58.4 -26:15:35  2.0 10.74 108
PPM 234652     18:33:03.3 -18:22:52  5.0  1.42 104
PPM 234690     18:34:37.7 -16:32:15  7.3  0.47 105
PPM 234658     18:33:20.6 -16:56:14 10.0  0.11 104
459865         18:33:47.6 -16:58:04 16.2       105
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 23.5 km RECON observability=0.5 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)
Kamloops 08:23:06 -22.3 Dark Down 13.4 220.2 Really Low 08:16:48 - 08:29:24 7488
Kelowna 08:23:00 -23.0 Dark Down 13.6 221.1 Really Low 08:16:42 - 08:29:18 7440
Peachland 08:23:01 -23.1 Dark Down 13.8 220.8 Really Low 08:16:43 - 08:29:19 7438
Summerland 08:23:00 -23.3 Dark Down 13.9 220.9 Really Low 08:16:42 - 08:29:18 7430
Penticton 08:23:00 -23.3 Dark Down 13.9 221.1 Really Low 08:16:42 - 08:29:18 7425
Victoria 08:23:09 -24.5 Dark Down 16.3 217.8 Really Low 08:16:51 - 08:29:27 7419
Oliver 08:22:58 -23.7 Dark Down 14.2 221.1 Really Low 08:16:40 - 08:29:16 7408
Anarchist Mountain Observatory 08:22:56 -23.9 Dark Down 14.2 221.3 Really Low 08:16:38 - 08:29:14 7398
Okanogan 08:22:56 -24.5 Dark Down 14.8 221.2 Really Low 08:16:38 - 08:29:14 7368
Sleaford 08:22:29 -19.1 Dark Down 6.0 232.3 Really Low 08:16:11 - 08:28:47 7366
Brewster 08:22:55 -24.8 Dark Down 15.1 221.1 Really Low 08:16:37 - 08:29:13 7357
Manson/Chelan 08:22:55 -25.0 Dark Down 15.4 220.8 Really Low 08:16:37 - 08:29:13 7351
Wenatchee 08:22:54 -25.5 Dark Down 15.9 220.7 Really Low 08:16:36 - 08:29:12 7329
Ellensburg 08:22:54 -25.9 Dark Down 16.3 220.6 Really Low 08:16:36 - 08:29:12 7310
Yakima 08:22:53 -26.3 Dark Down 16.6 220.7 Really Low 08:16:35 - 08:29:11 7289
Toppenish/White Swan 08:22:51 -26.5 Dark Down 16.7 220.9 Really Low 08:16:33 - 08:29:09 7275
The Dalles 08:22:51 -27.4 Dark Down 17.6 220.3 Really Low 08:16:33 - 08:29:09 7243
PNWRO 08:22:45 -26.8 Dark Down 16.3 222.2 Really Low 08:16:27 - 08:29:03 7237
Maupin 08:22:50 -27.8 Dark Down 17.9 220.5 Really Low 08:16:32 - 08:29:08 7219
Sisters 08:22:48 -28.7 Dark Down 18.8 220.2 Really Low 08:16:30 - 08:29:06 7176
Bend 08:22:47 -28.9 Dark Down 18.9 220.5 Really Low 08:16:29 - 08:29:05 7159
Oregon Observatory 08:22:47 -29.1 Dark Down 19.1 220.4 Really Low 08:16:29 - 08:29:05 7151
Chiloquin 08:22:44 -30.4 Dark Down 20.3 220.4 Low 08:16:26 - 08:29:02 7080
Klamath Falls 08:22:43 -30.7 Dark Down 20.5 220.5 Low 08:16:25 - 08:29:01 7058
Cedarville 08:22:34 -31.4 Dark Down 20.2 222.1 Low 08:16:16 - 08:28:52 6996
Fall River/Burney 08:22:37 -31.9 Dark Down 21.2 221.1 Low 08:16:19 - 08:28:55 6982
Greenville 08:22:33 -32.8 Dark Down 21.7 221.7 Low 08:16:15 - 08:28:51 6919
Gimple 08:22:33 -32.8 Dark Down 21.6 221.8 Low 08:16:15 - 08:28:51 6918
Quincy 08:22:33 -33.0 Dark Down 21.8 221.8 Low 08:16:15 - 08:28:51 6906
Portola 08:22:30 -33.1 Dark Down 21.7 222.2 Low 08:16:12 - 08:28:48 6892
Reno 08:22:27 -33.3 Dark Down 21.5 222.8 Low 08:16:09 - 08:28:45 6866
Carson City 08:22:26 -33.7 Dark Down 21.8 223.0 Low 08:16:08 - 08:28:44 6843
Gardnerville 08:22:25 -33.9 Dark Down 21.9 223.1 Low 08:16:07 - 08:28:43 6826
Yerington 08:22:22 -33.8 Dark Down 21.6 223.5 Low 08:16:04 - 08:28:40 6821
Hawthorne 08:22:19 -34.3 Dark Down 21.7 224.1 Low 08:16:01 - 08:28:37 6783
Lee Vining 08:22:19 -34.9 Dark Down 22.3 223.9 Low 08:16:01 - 08:28:37 6753
Bishop 08:22:14 -35.4 Dark Down 22.4 224.6 Low 08:15:56 - 08:28:32 6702
Dunrhomin 08:21:37 -30.2 Dark Down 12.8 234.2 Really Low 08:15:19 - 08:27:55 6676
Nikitin 08:21:36 -30.3 Dark Down 12.9 234.3 Really Low 08:15:18 - 08:27:54 6664
CU-SBO 08:21:36 -30.4 Dark Down 13.0 234.2 Really Low 08:15:18 - 08:27:54 6661
Beatty 08:22:06 -35.7 Dark Down 21.8 226.1 Low 08:15:48 - 08:28:24 6645
Patrick 08:21:50 -36.7 Dark Down 21.1 228.8 Low 08:15:32 - 08:28:08 6494
Laughlin/Bullhead City 08:21:52 -37.1 Dark Down 21.7 228.3 Low 08:15:34 - 08:28:10 6488
Wildwood 08:22:05 -38.7 Dark Down 24.8 225.4 Low 08:15:47 - 08:28:23 6474
Lake Havasu City 08:21:49 -37.7 Dark Down 22.0 228.7 Low 08:15:31 - 08:28:07 6435
Idyllwild 08:21:57 -38.8 Dark Down 24.0 227.1 Low 08:15:39 - 08:28:15 6420
Calipatria 08:21:50 -39.2 Dark Down 23.7 228.2 Low 08:15:32 - 08:28:08 6354
George/Scottsdale 08:21:37 -38.0 Dark Down 21.0 230.8 Low 08:15:19 - 08:27:55 6336
Yuma 08:21:45 -39.5 Dark Down 23.4 229.0 Low 08:15:27 - 08:28:03 6307

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 459865, (2027/08/05 08:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.95  76
Nunki          18:55:15.9 -26:17:49  2.0 10.74 108
PPM 234652     18:31:26.3 -18:24:10  5.0  1.42 104
PPM 234690     18:33:02.1 -16:33:37  7.3  0.47 105
PPM 234658     18:31:44.6 -16:57:32 10.0  0.11 104
459865         18:32:11.6 -16:59:23 16.2       104
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:27:53 UT

Marc W. Buie, Southwest Research Institute

RECON