RECON: TNO occultation with 517717

Event between (517717) 15KZ120 and star GA1380:01828526 with event index number of 1436152

Geocentric closest approach at 2025/03/19 05:32:06 UTC

J2000 position of star is 03:30:42.1 +49:33:42
Equinox of date position of star is 03:32:08.2 +49:37:43
Stellar brightness G=11.9, use SENSEUP=16
Star is 153 degrees from the moon. Moon is 80% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 13.9 AU from the Sun and 14.2 AU from the Earth.
The TNO is moving 25.7 km/sec on the sky relative to the star, or, 9.0 arcsec/hr.
The 1-sigma error in the time of the event is 178 seconds.
The 1-sigma cross-track error in the shadow position is 5033 km.
The sky-plane scale is 10307.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=60.3 km assuming a 5% albedo -- 2.3 sec chord
Diameter=24.6 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 517717, (2025/03/19 05:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:22.2 +16:33:29  0.8 35.60 160
Mirphak        03:26:08.2 +49:56:56  1.8  1.07 153
34 Per         03:31:11.0 +49:35:39  4.5  0.22 153
PPM 046269     03:33:04.0 +49:47:26  8.5  0.17 153
517717         03:32:31.2 +49:38:47 11.9       153
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 5.1 sigma about the mid-time.
The median site spacing is 3.2 km RECON observability=1.0 and success probability=4.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 05:32:57 -44.8 Dark Down 22.6 316.7 Low 05:17:57 - 05:47:57 4364
SwRI 05:32:57 -44.8 Dark Down 22.5 316.7 Low 05:17:57 - 05:47:57 4361
George/Scottsdale 05:33:31 -46.2 Dark Down 21.5 316.1 Low 05:18:31 - 05:48:31 4131
DCO 05:33:29 -44.5 Dark Down 23.3 315.3 Low 05:18:29 - 05:48:29 4070
Patrick 05:33:29 -43.8 Dark Down 23.9 314.9 Low 05:18:29 - 05:48:29 4036
Kingman/Dolan Springs 05:33:30 -43.9 Dark Down 23.9 314.9 Low 05:18:30 - 05:48:30 4027
Parker 05:33:34 -44.4 Dark Down 23.3 315.2 Low 05:18:34 - 05:48:34 4015
Lake Havasu City 05:33:33 -44.2 Dark Down 23.5 315.1 Low 05:18:33 - 05:48:33 4013
Mohave Valley 05:33:32 -43.7 Dark Down 24.0 314.9 Low 05:18:32 - 05:48:32 4001
Laughlin/Bullhead City 05:33:31 -43.6 Dark Down 24.2 314.8 Low 05:18:31 - 05:48:31 4001
Blythe 05:33:36 -44.6 Dark Down 23.1 315.3 Low 05:18:36 - 05:48:36 3999
Yuma 05:33:40 -45.1 Dark Down 22.4 315.5 Low 05:18:40 - 05:48:40 3995
Searchlight/Boulder City 05:33:31 -43.2 Dark Down 24.6 314.6 Low 05:18:31 - 05:48:31 3984
Henderson 05:33:29 -42.7 Dark Down 25.0 314.4 Low 05:18:29 - 05:48:29 3980
Calipatria 05:33:40 -44.3 Dark Down 23.2 315.1 Low 05:18:40 - 05:48:40 3951
Indian Springs 05:33:29 -42.0 Dark Down 25.8 314.0 Low 05:18:29 - 05:48:29 3946
Idyllwild 05:33:40 -43.1 Dark Down 24.4 314.6 Low 05:18:40 - 05:48:40 3893
Beatty 05:33:30 -41.1 Dark Down 26.6 313.5 Low 05:18:30 - 05:48:30 3891
Tonopah 05:33:27 -40.1 Dark Down 27.7 312.9 Low 05:18:27 - 05:48:27 3866
Bishop 05:33:31 -39.8 Dark Down 27.9 312.8 Low 05:18:31 - 05:48:31 3808
Wildwood 05:33:42 -41.7 Dark Down 25.7 313.9 Low 05:18:42 - 05:48:42 3793
Hawthorne 05:33:27 -38.9 Dark Down 28.8 312.2 Low 05:18:27 - 05:48:27 3793
Lee Vining 05:33:30 -39.0 Dark Down 28.7 312.3 Low 05:18:30 - 05:48:30 3770
Yerington 05:33:26 -38.3 Dark Down 29.5 311.9 Low 05:18:26 - 05:48:26 3764
Gardnerville 05:33:28 -38.0 Dark Down 29.8 311.7 Low 05:18:28 - 05:48:28 3734
Carson City 05:33:27 -37.8 Dark Down 29.9 311.6 Low 05:18:27 - 05:48:27 3731
Reno 05:33:26 -37.5 Dark Down 30.2 311.4 Up 05:18:26 - 05:48:26 3728
PNWRO 05:33:01 -33.8 Dark Down 33.9 308.6 Up 05:18:01 - 05:48:01 3711
Cedarville 05:33:19 -36.1 Dark Down 31.7 310.4 Up 05:18:19 - 05:48:19 3699
Pasco 05:33:01 -33.5 Dark Down 34.2 308.4 Up 05:18:01 - 05:48:01 3697
Portola 05:33:26 -37.0 Dark Down 30.8 311.1 Up 05:18:26 - 05:48:26 3694
Lakeview 05:33:17 -35.6 Dark Down 32.2 310.0 Up 05:18:17 - 05:48:17 3686
CPSLO 05:33:42 -39.6 Dark Down 27.8 312.9 Low 05:18:42 - 05:48:42 3685
Susanville 05:33:24 -36.5 Dark Down 31.3 310.7 Up 05:18:24 - 05:48:24 3681
Paisley 05:33:16 -35.1 Dark Down 32.7 309.7 Up 05:18:16 - 05:48:16 3672
Gimple 05:33:25 -36.5 Dark Down 31.2 310.8 Up 05:18:25 - 05:48:25 3671
Quincy 05:33:26 -36.6 Dark Down 31.1 310.9 Up 05:18:26 - 05:48:26 3668
Greenville 05:33:25 -36.5 Dark Down 31.2 310.8 Up 05:18:25 - 05:48:25 3667
North Lake 05:33:14 -34.6 Dark Down 33.2 309.3 Up 05:18:14 - 05:48:14 3649
Tonasket 05:32:52 -31.7 Dark Down 35.9 306.9 Up 05:17:52 - 05:47:52 3642
Okanogan 05:32:54 -31.8 Dark Down 35.7 307.0 Up 05:17:54 - 05:47:54 3642
Anarchist Mountain Observatory 05:32:51 -31.5 Dark Down 36.0 306.7 Up 05:17:51 - 05:47:51 3640
Fall River/Burney 05:33:23 -35.7 Dark Down 32.1 310.2 Up 05:18:23 - 05:48:23 3639
Brewster 05:32:55 -31.9 Dark Down 35.7 307.1 Up 05:17:55 - 05:47:55 3638
Toppenish/White Swan 05:33:02 -32.8 Dark Down 34.9 307.8 Up 05:18:02 - 05:48:02 3637
Oliver 05:32:51 -31.3 Dark Down 36.2 306.5 Up 05:17:51 - 05:47:51 3628
Yakima 05:33:01 -32.5 Dark Down 35.2 307.6 Up 05:18:01 - 05:48:01 3626
Redmond 05:33:11 -33.7 Dark Down 34.1 308.6 Up 05:18:11 - 05:48:11 3626
Entiat 05:32:57 -32.0 Dark Down 35.6 307.1 Up 05:17:57 - 05:47:57 3625
Manson/Chelan 05:32:56 -31.9 Dark Down 35.7 307.0 Up 05:17:56 - 05:47:56 3625
Wenatchee 05:32:58 -32.1 Dark Down 35.5 307.2 Up 05:17:58 - 05:47:58 3624
Goldendale 05:33:05 -32.9 Dark Down 34.8 307.9 Up 05:18:05 - 05:48:05 3624
Penticton 05:32:49 -31.0 Dark Down 36.4 306.3 Up 05:17:49 - 05:47:49 3621
Bend 05:33:12 -33.8 Dark Down 34.0 308.7 Up 05:18:12 - 05:48:12 3621
Ellensburg 05:33:00 -32.3 Dark Down 35.4 307.4 Up 05:18:00 - 05:48:00 3621
Maupin 05:33:07 -33.2 Dark Down 34.6 308.2 Up 05:18:07 - 05:48:07 3620
Kelowna 05:32:48 -30.8 Dark Down 36.6 306.2 Up 05:17:48 - 05:47:48 3618
Clarence Fulton 05:32:46 -30.6 Dark Down 36.7 306.0 Up 05:17:46 - 05:47:46 3618
Oregon Observatory 05:33:13 -33.8 Dark Down 34.0 308.7 Up 05:18:13 - 05:48:13 3616
La Pine/Gilchrist 05:33:13 -33.9 Dark Down 33.9 308.8 Up 05:18:13 - 05:48:13 3615
Summerland 05:32:49 -30.9 Dark Down 36.5 306.2 Up 05:17:49 - 05:47:49 3615
Klamath Falls 05:33:19 -34.7 Dark Down 33.1 309.5 Up 05:18:19 - 05:48:19 3613
The Dalles 05:33:06 -32.9 Dark Down 34.9 307.9 Up 05:18:06 - 05:48:06 3609
Sisters 05:33:11 -33.5 Dark Down 34.3 308.4 Up 05:18:11 - 05:48:11 3606
Victoria 05:32:58 -29.8 Dark Down 37.9 305.2 Up 05:17:58 - 05:47:58 3464

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 517717, (2025/03/19 05:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 35.60 160
Mirphak        03:24:19.4 +49:51:40  1.8  1.07 153
34 Per         03:29:22.1 +49:30:32  4.5  0.22 153
PPM 046269     03:31:14.7 +49:42:23  8.5  0.17 153
517717         03:30:42.1 +49:33:42 11.9       153
Positions are for J2000

Event circumstances last updated at 2019/11/26 22:49:31 UT

Marc W. Buie, Southwest Research Institute

RECON