RECON: TNO occultation with 523740

Event between (523740) 14TV85 and star GA0720:04914355 with event index number of 2324309

Geocentric closest approach at 2025/04/09 06:03:49 UTC

J2000 position of star is 12:50:55.4 -17:35:46
Equinox of date position of star is 12:52:12.9 -17:43:43
Stellar brightness G=15.0, 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 88% illuminated.
Apparent brightness V=21.2

[RECON map]
Object is 15.2 AU from the Sun and 14.2 AU from the Earth.
Apparent velocity is 21.2 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 33 seconds.
The 1-sigma cross-track error in the shadow position is 569 km.
The sky-plane scale is 10302.7 km/arcsec.

The object has an absolute magnitude Hv=9.4
Diameter=77.3 km assuming a 5% albedo -- 3.8 sec chord
Diameter=31.5 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523740, (2025/04/09 06:03UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:31.7 -11:17:33  1.0 10.50  46
9Bet Crv       12:35:43.2 -23:32:10  2.6  6.97  43
PPM 226546     12:57:13.2 -15:27:48  6.2  2.56  42
PPM 226436     12:52:23.2 -17:28:19  8.3  0.26  42
PPM 226447     12:52:46.9 -17:45:24  9.3  0.13  42
523740         12:52:15.5 -17:43:59 15.0        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 5.0 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.9 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 06:06:17 -28.9 Dark Up 19.8 170.5 Really Low 06:03:04 - 06:09:29 6610
Kamloops 06:06:56 -26.5 Dark Up 18.6 156.2 Really Low 06:03:43 - 06:10:08 6050
Dunrhomin 06:06:09 -40.3 Dark Up 31.6 170.4 Up 06:02:57 - 06:09:22 6047
Kelowna 06:06:54 -27.5 Dark Up 19.6 157.0 Really Low 06:03:42 - 06:10:07 6038
Nikitin 06:06:09 -40.5 Dark Up 31.8 170.3 Up 06:02:57 - 06:09:22 6035
CU-SBO 06:06:09 -40.6 Dark Up 31.8 170.2 Up 06:02:57 - 06:09:22 6028
Peachland 06:06:56 -27.5 Dark Up 19.6 156.7 Really Low 06:03:43 - 06:10:08 6021
Penticton 06:06:54 -27.7 Dark Up 19.9 156.9 Really Low 06:03:42 - 06:10:07 6017
Summerland 06:06:55 -27.6 Dark Up 19.8 156.8 Really Low 06:03:42 - 06:10:07 6016
Oliver 06:06:55 -28.0 Dark Up 20.2 156.8 Low 06:03:42 - 06:10:07 5997
Anarchist Mountain Observatory 06:06:54 -28.2 Dark Up 20.4 157.0 Low 06:03:42 - 06:10:07 5995
Okanogan 06:06:56 -28.7 Dark Up 21.0 156.7 Low 06:03:43 - 06:10:08 5950
Brewster 06:06:56 -28.8 Dark Up 21.2 156.4 Low 06:03:43 - 06:10:08 5927
Manson/Chelan 06:06:57 -28.9 Dark Up 21.2 156.0 Low 06:03:44 - 06:10:09 5901
Wenatchee 06:06:58 -29.2 Dark Up 21.6 155.8 Low 06:03:45 - 06:10:10 5868
PNWRO 06:06:54 -30.9 Dark Up 23.3 157.0 Low 06:03:41 - 06:10:06 5840
Ellensburg 06:06:58 -29.5 Dark Up 22.0 155.5 Low 06:03:46 - 06:10:11 5835
Victoria 06:07:05 -27.1 Dark Up 19.7 153.0 Really Low 06:03:52 - 06:10:17 5816
Yakima 06:06:59 -29.8 Dark Up 22.3 155.4 Low 06:03:47 - 06:10:12 5810
Toppenish/White Swan 06:06:59 -30.1 Dark Up 22.6 155.6 Low 06:03:46 - 06:10:11 5804
The Dalles 06:07:00 -30.4 Dark Up 23.0 154.6 Low 06:03:48 - 06:10:13 5725
Maupin 06:07:00 -30.8 Dark Up 23.4 154.7 Low 06:03:48 - 06:10:13 5704
Sisters 06:07:02 -31.3 Dark Up 24.1 154.0 Low 06:03:49 - 06:10:14 5630
Bend 06:07:01 -31.6 Dark Up 24.4 154.2 Low 06:03:49 - 06:10:14 5625
Oregon Observatory 06:07:02 -31.7 Dark Up 24.5 154.1 Low 06:03:49 - 06:10:14 5609
Cedarville 06:06:58 -34.1 Dark Up 27.0 154.8 Low 06:03:46 - 06:10:11 5509
Chiloquin 06:07:03 -32.6 Dark Up 25.6 153.4 Low 06:03:51 - 06:10:16 5507
Klamath Falls 06:07:03 -32.9 Dark Up 25.9 153.4 Low 06:03:51 - 06:10:16 5488
Fall River/Burney 06:07:02 -34.0 Dark Up 27.1 153.5 Low 06:03:50 - 06:10:15 5425
Reno 06:06:57 -35.9 Dark Up 28.9 154.7 Low 06:03:45 - 06:10:10 5392
Gimple 06:07:01 -35.0 Dark Up 28.1 153.8 Low 06:03:48 - 06:10:13 5387
Greenville 06:07:01 -34.9 Dark Up 28.0 153.7 Low 06:03:49 - 06:10:14 5383
Yerington 06:06:55 -36.7 Dark Up 29.6 155.3 Low 06:03:43 - 06:10:08 5382
Portola 06:06:59 -35.4 Dark Up 28.5 154.1 Low 06:03:47 - 06:10:12 5382
Hawthorne 06:06:53 -37.3 Dark Up 30.2 155.7 Up 06:03:41 - 06:10:06 5374
Patrick 06:06:35 -41.9 Dark Up 34.5 160.0 Up 06:03:23 - 06:09:48 5370
Quincy 06:07:01 -35.1 Dark Up 28.2 153.7 Low 06:03:48 - 06:10:13 5369
Carson City 06:06:57 -36.2 Dark Up 29.3 154.7 Low 06:03:45 - 06:10:10 5368
Gardnerville 06:06:57 -36.4 Dark Up 29.5 154.7 Low 06:03:45 - 06:10:10 5354
Beatty 06:06:47 -39.4 Dark Up 32.3 157.3 Up 06:03:35 - 06:10:00 5344
George/Scottsdale 06:06:28 -44.2 Dark Up 36.7 161.8 Up 06:03:16 - 06:09:41 5342
Laughlin/Bullhead City 06:06:39 -41.8 Dark Up 34.6 159.2 Up 06:03:27 - 06:09:52 5321
Lee Vining 06:06:55 -37.5 Dark Up 30.6 155.1 Up 06:03:43 - 06:10:08 5314
Bishop 06:06:52 -38.3 Dark Up 31.4 155.7 Up 06:03:40 - 06:10:05 5304
Lake Havasu City 06:06:37 -42.5 Dark Up 35.3 159.3 Up 06:03:25 - 06:09:50 5285
Yuma 06:06:37 -43.9 Dark Up 36.9 158.4 Up 06:03:25 - 06:09:50 5142
Calipatria 06:06:41 -43.1 Dark Up 36.2 157.6 Up 06:03:29 - 06:09:54 5132
Idyllwild 06:06:46 -42.1 Dark Up 35.2 156.5 Up 06:03:33 - 06:09:58 5122
Wildwood 06:06:52 -40.9 Dark Up 34.3 154.6 Up 06:03:40 - 06:10:05 5061

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 523740, (2025/04/09 06:03UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 10.50  46
9Bet Crv       12:34:23.2 -23:23:49  2.6  6.97  43
PPM 226546     12:55:53.2 -15:19:37  6.2  2.56  42
PPM 226436     12:51:03.1 -17:20:05  8.3  0.26  42
PPM 226447     12:51:26.8 -17:37:11  9.3  0.13  42
523740         12:50:55.4 -17:35:46 15.0        42
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:44:47 UT

Marc W. Buie, Southwest Research Institute

RECON