RECON: TNO occultation with 14OY393

Event between 14OY393 and star GA0900:16451988 with event index number of 2513827

Geocentric closest approach at 2025/07/26 09:12:48 UTC

J2000 position of star is 22:48:45.4 +01:21:53
Equinox of date position of star is 22:49:53.7 +01:28:58
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 157 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 27.2 AU from the Sun and 26.5 AU from the Earth.
The TNO is moving 16.4 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 393 seconds.
The 1-sigma cross-track error in the shadow position is 3426 km.
The sky-plane scale is 19188.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.4
Diameter=79.8 km assuming a 5% albedo -- 4.9 sec chord
Diameter=32.6 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 14OY393, (2025/07/26 09:13UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:03.4 -29:29:10  1.2 31.06 159
Markab         23:06:02.2 +15:20:36  2.5 14.39 144
1 Psc          22:56:18.0 +01:12:06  6.2  1.59 156
PPM 173396     22:46:41.0 +01:53:14  8.2  0.93 157
PPM 173444     22:49:24.6 +01:28:34  9.5  0.16 157
14OY393        22:50:03.8 +01:30:01 15.8       157
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 21.0 km RECON observability=1.0 and success probability=10.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 09:13:14 -18.5 Dark Down 37.9 154.4 Up 08:58:14 - 09:28:14 3351
Kelowna 09:13:12 -19.1 Dark Down 38.9 155.2 Up 08:58:12 - 09:28:12 3285
Peachland 09:13:13 -19.3 Dark Down 38.9 154.8 Up 08:58:13 - 09:28:13 3282
Summerland 09:13:14 -19.4 Dark Down 39.0 154.9 Up 08:58:14 - 09:28:14 3270
Penticton 09:13:13 -19.5 Dark Down 39.1 155.0 Up 08:58:13 - 09:28:13 3264
Victoria 09:13:31 -21.1 Dark Down 38.9 150.0 Up 08:58:31 - 09:28:31 3250
Sleaford 09:12:14 -13.8 AT Down 39.1 172.6 Up 08:57:14 - 09:27:14 3247
Oliver 09:13:14 -19.8 Dark Down 39.5 154.9 Up 08:58:14 - 09:28:14 3241
Anarchist Mountain Observatory 09:13:13 -19.9 Dark Down 39.7 155.1 Up 08:58:13 - 09:28:13 3227
Tonasket 09:13:15 -20.2 Dark Down 39.9 154.9 Up 08:58:15 - 09:28:15 3206
Okanogan 09:13:16 -20.6 Dark Down 40.2 154.6 Up 08:58:16 - 09:28:16 3185
Brewster 09:13:18 -20.9 Dark Down 40.4 154.3 Up 08:58:18 - 09:28:18 3169
Manson/Chelan 09:13:20 -21.2 Dark Down 40.5 153.7 Up 08:58:20 - 09:28:20 3160
Wenatchee 09:13:22 -21.6 Dark Down 40.8 153.3 Up 08:58:22 - 09:28:22 3129
Ellensburg 09:13:24 -22.1 Dark Down 41.1 152.9 Up 08:58:24 - 09:28:24 3104
Yakima 09:13:25 -22.5 Dark Down 41.5 152.7 Up 08:58:25 - 09:28:25 3075
Toppenish/White Swan 09:13:25 -22.7 Dark Down 41.7 152.9 Up 08:58:25 - 09:28:25 3057
Goldendale 09:13:28 -23.3 Dark Down 42.1 152.1 Up 08:58:28 - 09:28:28 3023
The Dalles 09:13:30 -23.5 Dark Down 42.2 151.5 Up 08:58:30 - 09:28:30 3012
PNWRO 09:13:19 -22.7 Dark Down 42.5 154.6 Up 08:58:19 - 09:28:19 3008
Maupin 09:13:31 -23.9 Dark Down 42.6 151.5 Up 08:58:31 - 09:28:31 2980
Sisters 09:13:35 -24.9 Dark Down 43.2 150.5 Up 08:58:35 - 09:28:35 2924
Bend 09:13:34 -25.0 Dark Down 43.5 150.7 Up 08:58:34 - 09:28:34 2902
Oregon Observatory 09:13:35 -25.2 Dark Down 43.6 150.5 Up 08:58:35 - 09:28:35 2891
North Lake 09:13:35 -25.7 Dark Down 44.3 150.9 Up 08:58:35 - 09:28:35 2834
Chiloquin 09:13:41 -26.6 Dark Down 44.6 149.3 Up 08:58:41 - 09:28:41 2798
Klamath Falls 09:13:41 -26.9 Dark Down 44.9 149.3 Up 08:58:41 - 09:28:41 2770
Lakeview 09:13:35 -26.6 Dark Down 45.5 151.1 Up 08:58:35 - 09:28:35 2745
Cedarville 09:13:36 -27.2 Dark Down 46.1 151.0 Up 08:58:36 - 09:28:36 2691
Fall River/Burney 09:13:43 -27.9 Dark Down 46.1 149.2 Up 08:58:43 - 09:28:43 2672
Susanville 09:13:41 -28.4 Dark Down 46.9 149.8 Up 08:58:41 - 09:28:41 2610
Greenville 09:13:43 -28.7 Dark Down 47.0 149.3 Up 08:58:43 - 09:28:43 2593
Gimple 09:13:43 -28.7 Dark Down 47.1 149.4 Up 08:58:43 - 09:28:43 2591
Quincy 09:13:43 -28.9 Dark Down 47.2 149.2 Up 08:58:43 - 09:28:43 2577
Portola 09:13:42 -28.9 Dark Down 47.5 149.7 Up 08:58:42 - 09:28:42 2559
Reno 09:13:40 -29.0 Dark Down 48.0 150.5 Up 08:58:40 - 09:28:40 2527
Carson City 09:13:40 -29.4 Dark Down 48.3 150.3 Up 08:58:40 - 09:28:40 2497
Gardnerville 09:13:40 -29.6 Dark Down 48.5 150.2 Up 08:58:40 - 09:28:40 2476
Yerington 09:13:37 -29.4 Dark Down 48.7 151.1 Up 08:58:37 - 09:28:37 2470
Hawthorne 09:13:36 -29.7 Dark Down 49.3 151.6 Up 08:58:36 - 09:28:36 2423
Lee Vining 09:13:40 -30.3 Dark Down 49.6 150.6 Up 08:58:40 - 09:28:40 2385
Tonopah 09:13:30 -29.7 Dark Down 50.2 153.3 Up 08:58:30 - 09:28:30 2361
Dunrhomin 09:12:27 -23.7 Dark Down 50.9 172.2 Up 08:57:27 - 09:27:27 2339
Bishop 09:13:37 -30.7 Dark Down 50.4 151.2 Up 08:58:37 - 09:28:37 2322
CU-SBO 09:12:28 -23.9 Dark Down 51.1 172.0 Up 08:57:28 - 09:27:28 2320
Beatty 09:13:30 -30.7 Dark Down 51.4 153.3 Up 08:58:30 - 09:28:30 2255
Indian Springs 09:13:26 -30.7 Dark Down 52.1 154.8 Up 08:58:26 - 09:28:26 2208
Henderson 09:13:23 -30.9 Dark Down 52.8 155.5 Up 08:58:23 - 09:28:23 2150
Patrick 09:13:19 -31.1 Dark Down 53.7 156.9 Up 08:58:19 - 09:28:19 2076
Laughlin/Bullhead City 09:13:23 -31.6 Dark Down 53.7 155.7 Up 08:58:23 - 09:28:23 2067
Kingman/Dolan Springs 09:13:20 -31.4 Dark Down 53.9 156.5 Up 08:58:20 - 09:28:20 2060
Wildwood 09:13:46 -33.8 Dark Down 53.2 148.9 Up 08:58:46 - 09:28:46 2045
Mohave Valley 09:13:23 -31.8 Dark Down 54.0 155.5 Up 08:58:23 - 09:28:23 2043
Lake Havasu City 09:13:23 -32.1 Dark Down 54.4 155.7 Up 08:58:23 - 09:28:23 2003
Idyllwild 09:13:37 -33.6 Dark Down 54.3 151.5 Up 08:58:37 - 09:28:37 1980
Parker 09:13:23 -32.4 Dark Down 54.8 155.6 Up 08:58:23 - 09:28:23 1971
Calipatria 09:13:32 -33.8 Dark Down 55.3 153.0 Up 08:58:32 - 09:28:32 1903
George/Scottsdale 09:13:12 -31.9 Dark Down 55.9 159.3 Up 08:58:12 - 09:28:12 1889
Yuma 09:13:28 -33.8 Dark Down 56.0 154.1 Up 08:58:28 - 09:28:28 1848

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 14OY393, (2025/07/26 09:13UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 31.06 159
Markab         23:04:45.8 +15:12:18  2.5 14.39 144
1 Psc          22:54:59.5 +01:03:54  6.2  1.59 156
PPM 173396     22:45:22.7 +01:45:08  8.2  0.93 157
PPM 173444     22:48:06.3 +01:20:26  9.5  0.16 157
14OY393        22:48:45.4 +01:21:53 15.8       157
Positions are for J2000

Event circumstances last updated at 2022/04/08 23:18:21 UT

Marc W. Buie, Southwest Research Institute

RECON