RECON: TNO occultation with 578832

Event between (578832) 14GP53 and star GA0740:07166841 with event index number of 2550576

Geocentric closest approach at 2026/04/10 09:59:04 UTC

J2000 position of star is 17:13:46.3 -14:58:11
Equinox of date position of star is 17:15:01.8 -14:59:38
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 36 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 23.1 AU from the Sun and 22.5 AU from the Earth.
The TNO is moving 9.0 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 529 seconds.
The 1-sigma cross-track error in the shadow position is 2318 km.
The sky-plane scale is 16340.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.9
Diameter=98.2 km assuming a 5% albedo -- 10.9 sec chord
Diameter=40.1 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 578832, (2026/04/10 09:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.4 -26:29:17  0.9 15.44  43
35Eta Oph      17:11:53.2 -15:45:20  2.6  1.11  37
PPM 232829     17:16:50.0 -14:36:43  5.9  0.54  36
PPM 232759     17:14:05.1 -15:11:35  8.3  0.35  36
PPM 232772     17:14:32.5 -14:51:14  9.1  0.23  36
578832         17:15:16.3 -14:59:55 16.7        36
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 1.7 sigma about the mid-time.
The median site spacing is 15.1 km RECON observability=1.0 and success probability=8.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:04:10 -18.8 Dark Up 21.7 164.7 Low 09:49:10 - 10:19:10 5055
Kamloops 10:05:44 -25.6 Dark Down 19.7 150.5 Really Low 09:50:44 - 10:20:44 4602
Kelowna 10:05:41 -25.9 Dark Down 20.7 151.2 Low 09:50:41 - 10:20:41 4578
Peachland 10:05:43 -26.1 Dark Down 20.7 150.9 Low 09:50:43 - 10:20:43 4563
Summerland 10:05:43 -26.2 Dark Down 20.9 150.9 Low 09:50:43 - 10:20:43 4557
Penticton 10:05:40 -26.2 Dark Down 20.9 151.0 Low 09:50:40 - 10:20:40 4556
Oliver 10:05:43 -26.5 Dark Down 21.3 151.0 Low 09:50:43 - 10:20:43 4535
Anarchist Mountain Observatory 10:05:40 -26.6 Dark Down 21.5 151.1 Low 09:50:40 - 10:20:40 4530
Tonasket 10:05:44 -26.8 Dark Down 21.7 151.0 Low 09:50:44 - 10:20:44 4509
Okanogan 10:05:44 -27.2 Dark Down 22.0 150.8 Low 09:50:44 - 10:20:44 4484
Brewster 10:05:46 -27.5 Dark Down 22.1 150.5 Low 09:50:46 - 10:20:46 4461
Manson/Chelan 10:05:51 -27.8 Dark Down 22.2 150.2 Low 09:50:51 - 10:20:51 4437
Wenatchee 10:05:51 -28.2 Dark Down 22.6 149.9 Low 09:50:51 - 10:20:51 4402
Dunrhomin 10:04:06 -26.0 Dark Up 33.3 163.9 Up 09:49:06 - 10:19:06 4393
Victoria 10:06:07 -28.4 Dark Down 20.6 147.2 Low 09:51:07 - 10:21:07 4384
Ellensburg 10:05:52 -28.6 Dark Down 22.8 149.6 Low 09:50:52 - 10:20:52 4370
PNWRO 10:05:44 -28.8 Dark Down 24.3 151.0 Low 09:50:44 - 10:20:44 4355
Yakima 10:05:55 -29.0 Dark Down 23.2 149.5 Low 09:50:55 - 10:20:55 4343
Toppenish/White Swan 10:05:53 -29.1 Dark Down 23.4 149.6 Low 09:50:53 - 10:20:53 4334
Goldendale 10:05:58 -29.7 Dark Down 23.8 149.1 Low 09:50:58 - 10:20:58 4285
The Dalles 10:06:00 -30.0 Dark Down 23.8 148.7 Low 09:51:00 - 10:21:00 4259
Maupin 10:06:00 -30.3 Dark Down 24.2 148.7 Low 09:51:00 - 10:21:00 4234
Sisters 10:06:05 -31.2 Dark Down 24.8 148.0 Low 09:51:05 - 10:21:05 4160
Bend 10:06:04 -31.3 Dark Down 25.1 148.2 Low 09:51:04 - 10:21:04 4151
Oregon Observatory 10:06:08 -31.5 Dark Down 25.2 148.1 Low 09:51:08 - 10:21:08 4136
North Lake 10:06:03 -31.8 Dark Down 25.9 148.4 Low 09:51:03 - 10:21:03 4108
Lakeview 10:06:01 -32.4 Dark Down 27.1 148.7 Low 09:51:01 - 10:21:01 4051
Chiloquin 10:06:11 -32.8 Dark Down 26.2 147.3 Low 09:51:11 - 10:21:11 4030
Cedarville 10:06:01 -32.9 Dark Up 27.7 148.7 Low 09:51:01 - 10:21:01 4010
Klamath Falls 10:06:11 -33.0 Dark Down 26.5 147.3 Low 09:51:11 - 10:21:11 4009
Fall River/Burney 10:06:10 -33.8 Dark Down 27.6 147.4 Low 09:51:10 - 10:21:10 3936
Susanville 10:06:06 -34.0 Dark Up 28.4 147.9 Low 09:51:06 - 10:21:06 3914
Gimple 10:06:08 -34.3 Dark Up 28.6 147.6 Low 09:51:08 - 10:21:08 3887
Greenville 10:06:08 -34.3 Dark Up 28.6 147.5 Low 09:51:08 - 10:21:08 3884
Reno 10:06:01 -34.3 Dark Up 29.5 148.5 Low 09:51:01 - 10:21:01 3878
Portola 10:06:06 -34.4 Dark Up 29.0 147.9 Low 09:51:06 - 10:21:06 3876
Quincy 10:06:08 -34.5 Dark Up 28.7 147.5 Low 09:51:08 - 10:21:08 3870
Yerington 10:05:57 -34.4 Dark Up 30.2 149.0 Up 09:50:57 - 10:20:57 3859
Tonopah 10:05:43 -34.1 Dark Up 31.8 150.6 Up 09:50:43 - 10:20:43 3855
Carson City 10:06:01 -34.5 Dark Up 29.8 148.4 Low 09:51:01 - 10:21:01 3852
Hawthorne 10:05:53 -34.5 Dark Up 30.9 149.3 Up 09:50:53 - 10:20:53 3842
Gardnerville 10:06:00 -34.7 Dark Up 30.1 148.4 Up 09:51:00 - 10:21:00 3836
Indian Springs 10:05:32 -34.4 Dark Up 33.7 151.7 Up 09:50:32 - 10:20:32 3795
Lee Vining 10:05:56 -35.2 Dark Up 31.1 148.7 Up 09:50:56 - 10:20:56 3784
Beatty 10:05:40 -34.8 Dark Up 33.0 150.7 Up 09:50:40 - 10:20:40 3783
Henderson 10:05:26 -34.4 Dark Up 34.4 152.3 Up 09:50:26 - 10:20:26 3777
Patrick 10:05:17 -34.2 Dark Up 35.4 153.3 Up 09:50:17 - 10:20:17 3768
Bishop 10:05:52 -35.3 Dark Up 31.9 149.2 Up 09:50:52 - 10:20:52 3763
Kingman/Dolan Springs 10:05:19 -34.5 Dark Up 35.5 153.0 Up 09:50:19 - 10:20:19 3744
Laughlin/Bullhead City 10:05:23 -34.8 Dark Up 35.3 152.4 Up 09:50:23 - 10:20:23 3724
George/Scottsdale 10:05:01 -34.2 Dark Up 37.6 154.9 Up 09:50:01 - 10:20:01 3706
Mohave Valley 10:05:23 -35.0 Dark Up 35.6 152.3 Up 09:50:23 - 10:20:23 3704
Lake Havasu City 10:05:22 -35.1 Dark Up 36.0 152.5 Up 09:50:22 - 10:20:22 3681
Parker 10:05:21 -35.3 Dark Up 36.3 152.4 Up 09:50:21 - 10:20:21 3655
Idyllwild 10:05:41 -37.0 Dark Up 35.7 149.7 Up 09:50:41 - 10:20:41 3539
Calipatria 10:05:31 -36.8 Dark Up 36.8 150.7 Up 09:50:31 - 10:20:31 3532
Yuma 10:05:24 -36.5 Dark Up 37.5 151.5 Up 09:50:24 - 10:20:24 3529
Wildwood 10:05:56 -37.8 Dark Up 34.7 147.9 Up 09:50:56 - 10:20:56 3501

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 578832, (2026/04/10 09:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.44  43
35Eta Oph      17:10:22.7 -15:43:29  2.6  1.11  37
PPM 232829     17:15:20.3 -14:35:03  5.9  0.54  36
PPM 232759     17:12:35.0 -15:09:49  8.3  0.35  36
PPM 232772     17:13:02.6 -14:49:28  9.1  0.23  36
578832         17:13:46.3 -14:58:11 16.7        36
Positions are for J2000

Event circumstances last updated at 2022/01/12 00:31:06 UT

Marc W. Buie, Southwest Research Institute

RECON