RECON: TNO occultation with 523622

Event between (523622) 07TG422 and star GA1020:00873212 with event index number of 2626493

Geocentric closest approach at 2025/12/02 02:46:36 UTC

J2000 position of star is 05:33:16.5 +13:33:40
Equinox of date position of star is 05:34:39.5 +13:34:36
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 55 degrees from the moon. Moon is 88% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 40.9 AU from the Sun and 40.0 AU from the Earth.
Apparent velocity is 23.6 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is 2209 km.
The sky-plane scale is 28976.7 km/arcsec.

The object has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 13.0 sec chord
Diameter=123.3 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 523622, (2025/12/02 02:47UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:34.5 +07:24:35  0.4  8.17  62
Bellatrix      05:26:31.4 +06:22:16  1.6  7.48  55
35 Ori         05:35:22.8 +14:19:17  5.6  0.76  55
PPM 121135     05:36:33.9 +13:25:42  7.8  0.47  56
PPM 121080     05:33:54.0 +13:54:09  9.5  0.38  55
PPM 121125     05:36:02.6 +13:25:53 10.2  0.35  55
523622         05:34:44.5 +13:34:39 16.4        55
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=0.1 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)
Kamloops 02:49:23 -26.0 Dark Up 10.4 81.2 Really Low 02:39:01 - 02:59:45 -2182
Kelowna 02:49:26 -26.5 Dark Up 10.8 81.7 Really Low 02:39:04 - 02:59:48 -2252
Peachland 02:49:26 -26.3 Dark Up 10.6 81.5 Really Low 02:39:04 - 02:59:48 -2255
Summerland 02:49:27 -26.4 Dark Up 10.7 81.5 Really Low 02:39:05 - 02:59:49 -2266
Penticton 02:49:27 -26.4 Dark Up 10.7 81.6 Really Low 02:39:05 - 02:59:49 -2273
Victoria 02:49:30 -23.8 Dark Up 8.1 78.6 Really Low 02:39:08 - 02:59:52 -2277
Oliver 02:49:28 -26.4 Dark Up 10.7 81.6 Really Low 02:39:06 - 02:59:50 -2297
Anarchist Mountain Observatory 02:49:29 -26.5 Dark Up 10.8 81.7 Really Low 02:39:07 - 02:59:51 -2312
Sleaford 02:49:13 -34.9 Dark Up 19.4 92.7 Really Low 02:38:51 - 02:59:35 -2322
Okanogan 02:49:31 -26.4 Dark Up 10.5 81.4 Really Low 02:39:09 - 02:59:53 -2354
Brewster 02:49:32 -26.2 Dark Up 10.4 81.2 Really Low 02:39:10 - 02:59:54 -2369
Manson/Chelan 02:49:33 -25.9 Dark Up 10.1 80.9 Really Low 02:39:11 - 02:59:55 -2378
Wenatchee 02:49:35 -25.8 Dark Up 9.9 80.7 Really Low 02:39:13 - 02:59:57 -2408
Ellensburg 02:49:36 -25.6 Dark Up 9.7 80.5 Really Low 02:39:14 - 02:59:58 -2434
Yakima 02:49:38 -25.6 Dark Up 9.6 80.4 Really Low 02:39:16 - 03:00:00 -2463
Toppenish/White Swan 02:49:38 -25.7 Dark Up 9.7 80.5 Really Low 02:39:16 - 03:00:00 -2482
The Dalles 02:49:41 -25.0 Dark Up 9.0 79.8 Really Low 02:39:19 - 03:00:03 -2525
PNWRO 02:49:40 -26.7 Dark Up 10.7 81.5 Really Low 02:39:18 - 03:00:02 -2536
Maupin 02:49:42 -25.1 Dark Up 9.0 79.8 Really Low 02:39:20 - 03:00:04 -2558
Sisters 02:49:45 -24.6 Dark Up 8.5 79.4 Really Low 02:39:23 - 03:00:07 -2614
Bend 02:49:46 -24.8 Dark Up 8.7 79.5 Really Low 02:39:24 - 03:00:08 -2637
Oregon Observatory 02:49:47 -24.7 Dark Up 8.6 79.4 Really Low 02:39:25 - 03:00:09 -2647
Chiloquin 02:49:51 -24.2 Dark Up 8.0 78.9 Really Low 02:39:29 - 03:00:13 -2740
Klamath Falls 02:49:52 -24.2 Dark Up 8.0 78.9 Really Low 02:39:30 - 03:00:14 -2769
Cedarville 02:49:54 -25.3 Dark Up 9.1 79.9 Really Low 02:39:32 - 03:00:16 -2855
Fall River/Burney 02:49:56 -24.3 Dark Up 8.1 79.0 Really Low 02:39:34 - 03:00:18 -2869
Greenville 02:49:59 -24.5 Dark Up 8.3 79.2 Really Low 02:39:37 - 03:00:21 -2951
Gimple 02:49:59 -24.6 Dark Up 8.3 79.3 Really Low 02:39:37 - 03:00:21 -2953
Quincy 02:50:00 -24.5 Dark Up 8.2 79.2 Really Low 02:39:38 - 03:00:22 -2967
Portola 02:50:00 -24.9 Dark Up 8.6 79.5 Really Low 02:39:38 - 03:00:22 -2987
Reno 02:50:00 -25.3 Dark Up 9.0 79.8 Really Low 02:39:38 - 03:00:22 -3022
Carson City 02:50:02 -25.3 Dark Up 9.0 79.8 Really Low 02:39:40 - 03:00:24 -3052
Gardnerville 02:50:03 -25.3 Dark Up 9.0 79.8 Really Low 02:39:41 - 03:00:25 -3073
Yerington 02:50:03 -25.7 Dark Up 9.4 80.1 Really Low 02:39:41 - 03:00:25 -3081
Hawthorne 02:50:03 -26.1 Dark Up 9.8 80.4 Really Low 02:39:41 - 03:00:25 -3130
Lee Vining 02:50:05 -25.6 Dark Up 9.3 80.0 Really Low 02:39:43 - 03:00:27 -3167
Bishop 02:50:07 -26.1 Dark Up 9.8 80.3 Really Low 02:39:45 - 03:00:29 -3233
Dunrhomin 02:49:52 -36.5 Dark Up 20.2 89.1 Low 02:39:30 - 03:00:14 -3257
Nikitin 02:49:52 -36.5 Dark Up 20.2 89.0 Low 02:39:30 - 03:00:14 -3272
CU-SBO 02:49:53 -36.5 Dark Up 20.2 89.0 Low 02:39:31 - 03:00:15 -3276
Beatty 02:50:08 -27.3 Dark Up 11.0 81.2 Really Low 02:39:46 - 03:00:30 -3307
Patrick 02:50:11 -29.5 Dark Up 13.1 82.5 Really Low 02:39:49 - 03:00:33 -3498
Laughlin/Bullhead City 02:50:12 -28.9 Dark Up 12.5 82.1 Really Low 02:39:50 - 03:00:34 -3505
Wildwood 02:50:16 -25.4 Dark Up 9.1 79.7 Really Low 02:39:54 - 03:00:38 -3513
Lake Havasu City 02:50:14 -29.0 Dark Up 12.6 82.1 Really Low 02:39:52 - 03:00:36 -3571
Idyllwild 02:50:17 -26.9 Dark Up 10.5 80.7 Really Low 02:39:55 - 03:00:39 -3586
Calipatria 02:50:18 -27.8 Dark Up 11.4 81.2 Really Low 02:39:56 - 03:00:40 -3667
George/Scottsdale 02:50:15 -30.9 Dark Up 14.5 83.2 Really Low 02:39:53 - 03:00:37 -3694
Yuma 02:50:19 -28.5 Dark Up 12.1 81.5 Really Low 02:39:57 - 03:00:41 -3726

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 523622, (2025/12/02 02:47UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  8.17  62
Bellatrix      05:25:07.8 +06:20:58  1.6  7.48  55
35 Ori         05:33:54.3 +14:18:20  5.6  0.76  55
PPM 121135     05:35:06.0 +13:24:47  7.8  0.47  56
PPM 121080     05:32:25.8 +13:53:09  9.5  0.38  55
PPM 121125     05:34:34.7 +13:24:57 10.2  0.35  55
523622         05:33:16.5 +13:33:40 16.4        55
Positions are for J2000

Event circumstances last updated at 2024/06/18 02:56:31 UT

Marc W. Buie, Southwest Research Institute

RECON