RECON: TNO occultation with 597614

Event between (597614) 07RM314 and star GA1000:00026852 with event index number of 2716675

Geocentric closest approach at 2026/09/18 03:36:13 UTC

J2000 position of star is 00:15:06.1 +10:39:46
Equinox of date position of star is 00:16:16.9 +10:47:24
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 111 degrees from the moon. Moon is 43% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 50.3 AU from the Sun and 49.3 AU from the Earth.
The TNO is moving 24.9 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 368 seconds.
The 1-sigma cross-track error in the shadow position is 3010 km.
The sky-plane scale is 35776.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=309.0 km assuming a 5% albedo -- 12.4 sec chord
Diameter=126.2 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 597614, (2026/09/18 03:36UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:14:36.9 +15:19:55  2.8  4.54 112
34 Psc         00:11:24.7 +11:17:40  5.3  1.33 110
PPM 116288     00:18:08.3 +10:23:35  8.2  0.58 111
PPM 116275     00:17:17.1 +10:57:14  8.8  0.24 111
597614         00:16:28.8 +10:48:41 15.0       111
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 2.4 sigma about the mid-time.
The median site spacing is 30.0 km RECON observability=0.5 and success probability=6.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:37:16 -14.2 AT Up 19.1 96.6 Really Low 03:22:16 - 03:52:16 -2474
Victoria 03:37:27 -13.1 AT Up 17.4 93.5 Really Low 03:22:27 - 03:52:27 -2487
Peachland 03:37:20 -15.0 AT Up 19.6 96.7 Really Low 03:22:20 - 03:52:20 -2518
Kelowna 03:37:18 -15.1 AT Up 19.8 97.0 Really Low 03:22:18 - 03:52:18 -2520
Summerland 03:37:20 -15.1 AT Up 19.7 96.8 Really Low 03:22:20 - 03:52:20 -2525
Penticton 03:37:20 -15.2 AT Up 19.8 96.8 Really Low 03:22:20 - 03:52:20 -2530
Oliver 03:37:22 -15.3 AT Up 19.8 96.7 Really Low 03:22:22 - 03:52:22 -2542
Anarchist Mountain Observatory 03:37:22 -15.5 AT Up 20.0 96.8 Really Low 03:22:22 - 03:52:22 -2552
Okanogan 03:37:25 -15.6 AT Up 19.9 96.4 Really Low 03:22:25 - 03:52:25 -2571
Manson/Chelan 03:37:28 -15.4 AT Up 19.6 95.8 Really Low 03:22:28 - 03:52:28 -2577
Brewster 03:37:26 -15.6 AT Up 19.8 96.2 Really Low 03:22:26 - 03:52:26 -2577
Wenatchee 03:37:29 -15.5 AT Up 19.5 95.5 Really Low 03:22:29 - 03:52:29 -2591
Ellensburg 03:37:31 -15.5 AT Up 19.4 95.2 Really Low 03:22:31 - 03:52:31 -2603
Yakima 03:37:33 -15.6 AT Up 19.5 95.1 Really Low 03:22:33 - 03:52:33 -2618
Toppenish/White Swan 03:37:33 -15.8 AT Up 19.6 95.1 Really Low 03:22:33 - 03:52:33 -2631
The Dalles 03:37:37 -15.6 AT Up 19.1 94.3 Really Low 03:22:37 - 03:52:37 -2645
Maupin 03:37:39 -15.8 AT Up 19.2 94.2 Really Low 03:22:39 - 03:52:39 -2665
PNWRO 03:37:34 -16.9 AT Up 20.7 96.1 Low 03:22:34 - 03:52:34 -2679
Sisters 03:37:43 -15.7 AT Up 19.0 93.5 Really Low 03:22:43 - 03:52:43 -2691
Bend 03:37:44 -16.0 AT Up 19.2 93.7 Really Low 03:22:44 - 03:52:44 -2707
Oregon Observatory 03:37:45 -16.0 AT Up 19.1 93.5 Really Low 03:22:45 - 03:52:45 -2711
Sleaford 03:36:58 -21.5 Dark Down 27.6 109.3 Low 03:21:58 - 03:51:58 -2752
Chiloquin 03:37:50 -16.1 AT Up 18.9 92.8 Really Low 03:22:50 - 03:52:50 -2762
Klamath Falls 03:37:51 -16.3 AT Up 19.0 92.7 Really Low 03:22:51 - 03:52:51 -2779
Fall River/Burney 03:37:56 -16.9 AT Up 19.3 92.6 Really Low 03:22:56 - 03:52:56 -2845
Cedarville 03:37:53 -17.6 AT Up 20.2 93.6 Low 03:22:53 - 03:52:53 -2850
Greenville 03:37:59 -17.5 AT Up 19.7 92.6 Really Low 03:22:59 - 03:52:59 -2900
Gimple 03:37:59 -17.6 AT Up 19.8 92.6 Really Low 03:22:59 - 03:52:59 -2903
Quincy 03:37:59 -17.6 AT Up 19.7 92.5 Really Low 03:22:59 - 03:52:59 -2911
Portola 03:37:59 -18.0 AT Up 20.1 92.8 Low 03:22:59 - 03:52:59 -2929
Reno 03:37:59 -18.6 Dark Up 20.6 93.1 Low 03:22:59 - 03:52:59 -2959
Carson City 03:37:59 -18.7 Dark Up 20.6 93.0 Low 03:22:59 - 03:52:59 -2979
Gardnerville 03:37:59 -18.8 Dark Up 20.7 92.9 Low 03:22:59 - 03:52:59 -2993
Yerington 03:37:59 -19.2 Dark Up 21.1 93.3 Low 03:22:59 - 03:52:59 -3005
Hawthorne 03:37:59 -19.8 Dark Up 21.6 93.5 Low 03:22:59 - 03:52:59 -3045
Lee Vining 03:37:59 -19.6 Dark Up 21.2 92.9 Low 03:22:59 - 03:52:59 -3065
Bishop 03:37:59 -20.3 Dark Up 21.8 93.2 Low 03:22:59 - 03:52:59 -3121
Beatty 03:37:59 -21.7 Dark Up 23.2 94.0 Low 03:22:59 - 03:52:59 -3191
Dunrhomin 03:37:42 -28.4 Dark Up 31.6 103.6 Up 03:22:42 - 03:52:42 -3333
Wildwood 03:37:59 -21.2 Dark Up 21.8 91.7 Low 03:22:59 - 03:52:59 -3342
CU-SBO 03:37:43 -28.5 Dark Up 31.5 103.4 Up 03:22:43 - 03:52:43 -3344
Laughlin/Bullhead City 03:37:59 -24.0 Dark Up 25.0 94.6 Low 03:22:59 - 03:52:59 -3365
Patrick 03:37:59 -24.4 Dark Up 25.6 95.1 Low 03:22:59 - 03:52:59 -3366
Idyllwild 03:37:59 -22.8 Dark Up 23.4 92.7 Low 03:22:59 - 03:52:59 -3414
Lake Havasu City 03:37:59 -24.4 Dark Up 25.3 94.4 Low 03:22:59 - 03:52:59 -3419
Calipatria 03:37:59 -23.9 Dark Up 24.4 93.1 Low 03:22:59 - 03:52:59 -3491
George/Scottsdale 03:37:59 -26.6 Dark Up 27.4 95.5 Low 03:22:59 - 03:52:59 -3542
Yuma 03:37:59 -24.8 Dark Up 25.2 93.4 Low 03:22:59 - 03:52:59 -3547

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 597614, (2026/09/18 03:36UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:13:14.2 +15:11:01  2.8  4.54 112
34 Psc         00:10:02.2 +11:08:45  5.3  1.33 110
PPM 116288     00:16:45.6 +10:14:41  8.2  0.58 111
PPM 116275     00:15:54.5 +10:48:20  8.8  0.24 111
597614         00:15:06.1 +10:39:46 15.0       111
Positions are for J2000

Event circumstances last updated at 2022/11/13 04:03:29 UT

Marc W. Buie, Southwest Research Institute

RECON