RECON: TNO occultation with 469362

Event between (469362) 01KB77 and star GA0800:10605026 with event index number of 1429037

Geocentric closest approach at 2025/05/13 10:27:30 UTC

J2000 position of star is 18:32:30.5 -08:33:04
Equinox of date position of star is 18:33:50.5 -08:31:53
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 42 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=22.3

[RECON map]
Object is 28.4 AU from the Sun and 27.7 AU from the Earth.
Apparent velocity is 15.5 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 399 seconds.
The 1-sigma cross-track error in the shadow position is 2572 km.
The sky-plane scale is 20081.2 km/arcsec.

The object has an absolute magnitude Hv=7.7
Diameter=199.5 km assuming a 5% albedo -- 11.2 sec chord
Diameter=81.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469362, (2025/05/13 10:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:58.0 -26:29:10  0.9 34.21   9
60Bet Oph      17:44:43.6 +04:33:30  2.8 17.93  40
Alp Sct        18:36:35.3 -08:13:26  3.8  0.73  42
PPM 201851     18:34:43.8 -08:32:45  8.2  0.21  42
PPM 201833     18:33:31.4 -08:39:58  9.2  0.16  42
469362         18:33:53.5 -08:31:50 15.6        42
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 15.8 km RECON observability=0.7 and success probability=2.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:29:16 -6.1 NT Up 29.2 185.3 Low 10:14:16 - 10:44:16 7276
Kamloops 10:30:15 -13.1 AT Up 30.2 169.1 Up 10:15:15 - 10:45:15 6836
Kelowna 10:30:12 -13.4 AT Up 31.1 170.0 Up 10:15:12 - 10:45:12 6812
Peachland 10:30:13 -13.6 AT Up 31.2 169.7 Up 10:15:13 - 10:45:13 6797
Summerland 10:30:12 -13.7 AT Up 31.3 169.8 Up 10:15:12 - 10:45:12 6791
Penticton 10:30:11 -13.7 AT Up 31.4 169.9 Up 10:15:11 - 10:45:11 6790
Oliver 10:30:11 -14.0 AT Up 31.8 169.9 Up 10:15:11 - 10:45:11 6769
Anarchist Mountain Observatory 10:30:10 -14.1 AT Up 32.0 170.1 Up 10:15:10 - 10:45:10 6764
Okanogan 10:30:10 -14.7 AT Up 32.6 169.7 Up 10:15:10 - 10:45:10 6718
Brewster 10:30:11 -15.0 AT Up 32.8 169.5 Up 10:15:11 - 10:45:11 6696
Manson/Chelan 10:30:14 -15.3 AT Up 33.0 169.0 Up 10:15:14 - 10:45:14 6672
Wenatchee 10:30:14 -15.7 AT Up 33.4 168.8 Up 10:15:14 - 10:45:14 6638
Victoria 10:30:27 -16.0 AT Up 31.9 165.4 Up 10:15:27 - 10:45:27 6621
Dunrhomin 10:28:52 -13.3 AT Up 40.9 187.0 Up 10:13:52 - 10:43:52 6615
Ellensburg 10:30:12 -16.2 AT Up 33.8 168.5 Up 10:15:12 - 10:45:12 6605
Nikitin 10:28:53 -13.5 AT Up 41.1 187.0 Up 10:13:53 - 10:43:53 6602
CU-SBO 10:28:51 -13.6 AT Up 41.2 186.9 Up 10:13:51 - 10:43:51 6596
PNWRO 10:30:07 -16.2 AT Up 35.0 170.3 Up 10:15:07 - 10:45:07 6589
Yakima 10:30:14 -16.5 AT Up 34.2 168.4 Up 10:15:14 - 10:45:14 6579
Toppenish/White Swan 10:30:14 -16.6 AT Up 34.4 168.6 Up 10:15:14 - 10:45:14 6569
The Dalles 10:30:16 -17.5 AT Up 35.1 167.5 Up 10:15:16 - 10:45:16 6495
Maupin 10:30:14 -17.8 AT Up 35.5 167.6 Up 10:15:14 - 10:45:14 6471
Sisters 10:30:18 -18.7 Dark Up 36.3 166.8 Up 10:15:18 - 10:45:18 6397
Bend 10:30:15 -18.8 Dark Up 36.5 167.1 Up 10:15:15 - 10:45:15 6389
Oregon Observatory 10:30:18 -19.0 Dark Up 36.7 166.9 Up 10:15:18 - 10:45:18 6373
Chiloquin 10:30:16 -20.2 Dark Up 37.9 166.2 Up 10:15:16 - 10:45:16 6268
Cedarville 10:30:08 -20.3 Dark Up 39.2 168.1 Up 10:15:08 - 10:45:08 6247
Klamath Falls 10:30:17 -20.5 Dark Up 38.3 166.2 Up 10:15:17 - 10:45:17 6247
Fall River/Burney 10:30:14 -21.2 Dark Up 39.5 166.5 Up 10:15:14 - 10:45:14 6174
Gimple 10:30:10 -21.7 Dark Up 40.4 166.9 Up 10:15:10 - 10:45:10 6125
Greenville 10:30:10 -21.7 Dark Up 40.4 166.8 Up 10:15:10 - 10:45:10 6122
Reno 10:30:05 -21.7 Dark Up 41.2 168.2 Up 10:15:05 - 10:45:05 6115
Portola 10:30:09 -21.8 Dark Up 40.8 167.4 Up 10:15:09 - 10:45:09 6114
Quincy 10:30:09 -21.9 Dark Up 40.6 166.8 Up 10:15:09 - 10:45:09 6107
Yerington 10:30:01 -21.8 Dark Up 41.8 168.9 Up 10:15:01 - 10:45:01 6095
Carson City 10:30:04 -21.9 Dark Up 41.5 168.1 Up 10:15:04 - 10:45:04 6089
Hawthorne 10:29:57 -21.9 Dark Up 42.4 169.5 Up 10:14:57 - 10:44:57 6078
Gardnerville 10:30:03 -22.1 Dark Up 41.8 168.1 Up 10:15:03 - 10:45:03 6072
Lee Vining 10:30:00 -22.5 Dark Up 42.8 168.8 Up 10:15:00 - 10:45:00 6020
Beatty 10:29:45 -22.1 Dark Up 44.2 171.7 Up 10:14:45 - 10:44:45 6017
Patrick 10:29:30 -21.6 Dark Up 45.9 175.5 Up 10:14:30 - 10:44:30 5999
Bishop 10:29:56 -22.6 Dark Up 43.5 169.6 Up 10:14:56 - 10:44:56 5998
Laughlin/Bullhead City 10:29:32 -22.2 Dark Up 46.1 174.5 Up 10:14:32 - 10:44:32 5957
George/Scottsdale 10:29:14 -21.6 Dark Up 47.7 178.2 Up 10:14:14 - 10:44:14 5936
Lake Havasu City 10:29:28 -22.5 Dark Up 46.8 174.7 Up 10:14:28 - 10:44:28 5913
Idyllwild 10:29:42 -24.4 Dark Up 47.3 171.3 Up 10:14:42 - 10:44:42 5774
Calipatria 10:29:34 -24.2 Dark Up 48.1 172.9 Up 10:14:34 - 10:44:34 5765
Yuma 10:29:28 -24.0 Dark Up 48.6 174.1 Up 10:14:28 - 10:44:28 5761
Wildwood 10:29:52 -25.2 Dark Up 46.7 168.7 Up 10:14:52 - 10:44:52 5737

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, (2025/05/13 10:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.21   9
60Bet Oph      17:43:28.3 +04:34:06  2.8 17.93  40
Alp Sct        18:35:12.4 -08:14:45  3.8  0.73  42
PPM 201851     18:33:20.8 -08:34:01  8.2  0.21  42
PPM 201833     18:32:08.3 -08:41:10  9.2  0.16  42
469362         18:32:30.5 -08:33:04 15.6        42
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:46:38 UT

Marc W. Buie, Southwest Research Institute

RECON