RECON: TNO occultation with 525258

Event between (525258) 04VT75 and star GA1120:00362092 with event index number of 1593719

Geocentric closest approach at 2024/09/23 05:22:15 UTC

J2000 position of star is 03:07:10.5 +22:54:56
Equinox of date position of star is 03:08:34.9 +23:00:26
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 20 degrees from the moon. Moon is 67% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 40.7 AU from the Sun and 40.1 AU from the Earth.
Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 146 seconds.
The 1-sigma cross-track error in the shadow position is 1791 km.
The sky-plane scale is 29064.5 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=316.2 km assuming a 5% albedo -- 21.4 sec chord
Diameter=129.1 km assuming a 30% albedo -- 8.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 525258, (2024/09/23 05:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:20.5 +16:33:26  0.8 21.82  10
44Zet Per      03:55:41.6 +31:57:18  2.8 13.73  10
52 Ari         03:06:54.1 +25:21:00  6.1  2.37  20
PPM 092225     03:09:19.0 +23:46:53  8.1  0.79  20
PPM 092229     03:09:34.7 +22:45:10  9.6  0.34  20
PPM 092227     03:09:28.8 +23:13:09 10.3  0.29  20
525258         03:08:36.8 +23:00:34 15.2        20
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 23.7 km RECON observability=0.8 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 05:26:21 -30.7 Dark Up 21.9 80.1 Low 05:13:42 - 05:39:01 11988
Victoria 05:26:35 -30.8 Dark Up 19.5 77.1 Really Low 05:13:55 - 05:39:14 11940
Peachland 05:26:27 -31.7 Dark Up 22.1 80.2 Low 05:13:47 - 05:39:06 11913
Kelowna 05:26:26 -31.7 Dark Up 22.3 80.4 Low 05:13:47 - 05:39:06 11911
Summerland 05:26:28 -31.8 Dark Up 22.1 80.2 Low 05:13:48 - 05:39:07 11901
Penticton 05:26:28 -31.9 Dark Up 22.2 80.2 Low 05:13:49 - 05:39:08 11893
Oliver 05:26:30 -32.2 Dark Up 22.1 80.1 Low 05:13:50 - 05:39:09 11870
Anarchist Mountain Observatory 05:26:31 -32.4 Dark Up 22.2 80.2 Low 05:13:52 - 05:39:11 11854
Okanogan 05:26:34 -32.7 Dark Up 22.0 79.8 Low 05:13:55 - 05:39:14 11818
Brewster 05:26:37 -32.9 Dark Up 21.8 79.5 Low 05:13:57 - 05:39:16 11805
Manson/Chelan 05:26:38 -32.8 Dark Up 21.5 79.2 Low 05:13:58 - 05:39:17 11803
Wenatchee 05:26:41 -33.1 Dark Up 21.3 78.9 Low 05:14:02 - 05:39:21 11776
Ellensburg 05:26:45 -33.3 Dark Up 21.1 78.6 Low 05:14:05 - 05:39:24 11755
Yakima 05:26:46 -33.6 Dark Up 21.0 78.4 Low 05:14:06 - 05:39:25 11728
Toppenish/White Swan 05:26:47 -33.8 Dark Up 21.1 78.5 Low 05:14:07 - 05:39:26 11708
Sleaford 05:25:58 -34.9 Dark Up 30.9 91.7 Up 05:13:19 - 05:38:38 11684
The Dalles 05:26:51 -33.9 Dark Up 20.4 77.7 Low 05:14:12 - 05:39:31 11679
Maupin 05:26:54 -34.3 Dark Up 20.4 77.6 Low 05:14:14 - 05:39:33 11647
PNWRO 05:26:48 -34.8 Dark Up 22.1 79.3 Low 05:14:09 - 05:39:28 11637
Sisters 05:27:00 -34.6 Dark Up 19.9 77.0 Really Low 05:14:20 - 05:39:39 11601
Bend 05:26:59 -34.9 Dark Up 20.0 77.0 Low 05:14:20 - 05:39:39 11576
Oregon Observatory 05:27:03 -35.0 Dark Up 19.9 76.9 Really Low 05:14:23 - 05:39:42 11568
Chiloquin 05:27:09 -35.6 Dark Up 19.3 76.2 Really Low 05:14:29 - 05:39:48 11486
Klamath Falls 05:27:11 -35.9 Dark Up 19.3 76.1 Really Low 05:14:32 - 05:39:51 11459
Fall River/Burney 05:27:17 -36.9 Dark Up 19.3 76.0 Really Low 05:14:37 - 05:39:56 11359
Cedarville 05:27:14 -37.3 Dark Up 20.3 76.9 Low 05:14:34 - 05:39:53 11355
Greenville 05:27:21 -37.7 Dark Up 19.4 76.0 Really Low 05:14:42 - 05:40:01 11276
Gimple 05:27:21 -37.8 Dark Up 19.5 76.0 Really Low 05:14:42 - 05:40:01 11273
Quincy 05:27:22 -37.9 Dark Up 19.4 75.9 Really Low 05:14:43 - 05:40:02 11260
Portola 05:27:23 -38.2 Dark Up 19.7 76.1 Really Low 05:14:43 - 05:40:02 11235
Reno 05:27:22 -38.8 Dark Up 20.1 76.4 Low 05:14:43 - 05:40:02 11192
Carson City 05:27:24 -39.0 Dark Up 20.1 76.3 Low 05:14:44 - 05:40:03 11164
Gardnerville 05:27:27 -39.2 Dark Up 20.1 76.2 Low 05:14:48 - 05:40:07 11143
Yerington 05:27:26 -39.6 Dark Up 20.5 76.6 Low 05:14:47 - 05:40:06 11127
Hawthorne 05:27:28 -40.2 Dark Up 20.8 76.7 Low 05:14:49 - 05:40:08 11072
Lee Vining 05:27:32 -40.3 Dark Up 20.3 76.2 Low 05:14:52 - 05:40:11 11044
Bishop 05:27:34 -41.1 Dark Up 20.7 76.4 Low 05:14:55 - 05:40:14 10971
Beatty 05:27:34 -42.4 Dark Up 21.9 77.1 Low 05:14:55 - 05:40:14 10876
Dunrhomin 05:27:01 -45.5 Dark Up 31.3 85.3 Up 05:14:22 - 05:39:41 10755
Nikitin 05:27:01 -45.6 Dark Up 31.2 85.1 Up 05:14:22 - 05:39:41 10741
CU-SBO 05:27:03 -45.7 Dark Up 31.2 85.0 Up 05:14:23 - 05:39:42 10738
Wildwood 05:27:49 -43.1 Dark Up 19.8 75.2 Really Low 05:15:10 - 05:40:29 10709
Laughlin/Bullhead City 05:27:39 -44.9 Dark Up 23.3 77.6 Low 05:15:00 - 05:40:19 10653
Patrick 05:27:39 -45.1 Dark Up 23.9 78.0 Low 05:14:59 - 05:40:18 10649
Idyllwild 05:27:49 -44.5 Dark Up 21.3 76.0 Low 05:15:09 - 05:40:28 10610
Lake Havasu City 05:27:43 -45.5 Dark Up 23.3 77.4 Low 05:15:03 - 05:40:22 10587
Calipatria 05:27:50 -45.7 Dark Up 22.1 76.3 Low 05:15:10 - 05:40:29 10514
Yuma 05:27:51 -46.5 Dark Up 22.7 76.5 Low 05:15:11 - 05:40:30 10443
George/Scottsdale 05:27:42 -47.5 Dark Up 25.2 78.2 Low 05:15:03 - 05:40:22 10430

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 525258, (2024/09/23 05:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 21.82  10
44Zet Per      03:54:07.9 +31:53:01  2.8 13.73  10
52 Ari         03:05:26.7 +25:15:19  6.1  2.37  20
PPM 092225     03:07:52.3 +23:41:16  8.1  0.79  20
PPM 092229     03:08:08.5 +22:39:34  9.6  0.34  20
PPM 092227     03:08:02.4 +23:07:32 10.3  0.29  20
525258         03:07:10.5 +22:54:56 15.2        20
Positions are for J2000

Event circumstances last updated at 2024/03/02 05:58:33 UT

Marc W. Buie, Southwest Research Institute

RECON