RECON: TNO occultation with 576357

Event between (576357) 12PV45 and star GA1040:00113067 with event index number of 2524286

Geocentric closest approach at 2025/10/03 08:47:28 UTC

J2000 position of star is 01:08:09.7 +15:11:17
Equinox of date position of star is 01:09:25.3 +15:18:52
Stellar brightness G=13.5, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 62 degrees from the moon. Moon is 82% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 17.3 AU from the Sun and 16.4 AU from the Earth.
Apparent velocity is 21.1 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 51 seconds.
The 1-sigma cross-track error in the shadow position is 807 km.
The sky-plane scale is 11863.8 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=74.1 km assuming a 5% albedo -- 3.6 sec chord
Diameter=30.3 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 576357, (2025/10/03 08:48UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.1 +16:33:33  0.8 49.84 109
6Bet Ari       01:56:04.1 +20:55:58  2.6 12.39  74
72 Psc         01:06:27.2 +15:05:02  5.7  0.78  61
PPM 117038     01:07:18.6 +15:31:10  7.8  0.57  62
PPM 117076     01:09:33.7 +15:15:46  9.3  0.06  62
576357         01:09:31.7 +15:19:30 13.5        62
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 29.8 km RECON observability=1.0 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 08:45:59 -42.0 Dark Up 54.1 190.6 Up 08:41:15 - 08:50:43 6644
Kelowna 08:45:56 -42.6 Dark Up 54.8 192.3 Up 08:41:12 - 08:50:40 6549
Peachland 08:45:58 -42.8 Dark Up 55.0 191.8 Up 08:41:14 - 08:50:42 6548
Victoria 08:46:11 -44.6 Dark Up 56.6 186.0 Up 08:41:27 - 08:50:55 6545
Summerland 08:45:58 -42.9 Dark Up 55.1 192.0 Up 08:41:14 - 08:50:42 6532
Penticton 08:45:57 -42.9 Dark Up 55.2 192.2 Up 08:41:13 - 08:50:41 6523
Oliver 08:45:58 -43.2 Dark Up 55.5 192.3 Up 08:41:14 - 08:50:42 6492
Anarchist Mountain Observatory 08:45:58 -43.4 Dark Up 55.6 192.7 Up 08:41:14 - 08:50:42 6472
Sleaford 08:45:14 -36.7 Dark Down 49.6 211.7 Up 08:40:30 - 08:49:58 6422
Okanogan 08:45:59 -44.0 Dark Up 56.3 192.6 Up 08:41:15 - 08:50:43 6420
Brewster 08:46:00 -44.3 Dark Up 56.6 192.3 Up 08:41:16 - 08:50:44 6402
Manson/Chelan 08:46:02 -44.6 Dark Up 56.8 191.7 Up 08:41:18 - 08:50:46 6394
Wenatchee 08:46:03 -45.1 Dark Up 57.3 191.6 Up 08:41:19 - 08:50:47 6357
Ellensburg 08:46:04 -45.5 Dark Up 57.8 191.3 Up 08:41:20 - 08:50:48 6326
Yakima 08:46:05 -45.9 Dark Up 58.2 191.5 Up 08:41:21 - 08:50:49 6290
Toppenish/White Swan 08:46:05 -46.1 Dark Up 58.4 191.8 Up 08:41:21 - 08:50:49 6266
The Dalles 08:46:08 -47.0 Dark Up 59.2 190.6 Up 08:41:24 - 08:50:52 6219
PNWRO 08:46:00 -46.0 Dark Up 58.5 194.7 Up 08:41:16 - 08:50:44 6188
Maupin 08:46:09 -47.3 Dark Up 59.6 191.0 Up 08:41:25 - 08:50:53 6178
Sisters 08:46:12 -48.3 Dark Up 60.6 190.3 Up 08:41:28 - 08:50:56 6113
Bend 08:46:11 -48.5 Dark Up 60.8 190.9 Up 08:41:27 - 08:50:55 6084
Oregon Observatory 08:46:12 -48.6 Dark Up 60.9 190.7 Up 08:41:28 - 08:50:56 6072
Chiloquin 08:46:15 -50.0 Dark Up 62.3 190.4 Up 08:41:31 - 08:50:59 5964
Klamath Falls 08:46:16 -50.3 Dark Up 62.6 190.7 Up 08:41:32 - 08:51:00 5929
Cedarville 08:46:12 -50.5 Dark Up 63.0 194.3 Up 08:41:28 - 08:50:56 5813
Fall River/Burney 08:46:17 -51.3 Dark Up 63.7 191.9 Up 08:41:33 - 08:51:01 5807
Greenville 08:46:16 -52.0 Dark Up 64.5 193.3 Up 08:41:32 - 08:51:00 5707
Gimple 08:46:16 -52.0 Dark Up 64.5 193.5 Up 08:41:32 - 08:51:00 5704
Quincy 08:46:17 -52.2 Dark Up 64.7 193.4 Up 08:41:33 - 08:51:01 5688
Portola 08:46:15 -52.2 Dark Up 64.8 194.5 Up 08:41:31 - 08:50:59 5660
Reno 08:46:14 -52.2 Dark Up 64.9 196.1 Up 08:41:30 - 08:50:58 5613
Carson City 08:46:14 -52.5 Dark Up 65.2 196.4 Up 08:41:30 - 08:50:58 5578
Gardnerville 08:46:14 -52.8 Dark Up 65.4 196.6 Up 08:41:30 - 08:50:58 5553
Yerington 08:46:11 -52.5 Dark Up 65.3 197.9 Up 08:41:27 - 08:50:55 5539
Hawthorne 08:46:10 -52.8 Dark Up 65.6 199.4 Up 08:41:26 - 08:50:54 5476
Lee Vining 08:46:13 -53.4 Dark Up 66.2 198.7 Up 08:41:29 - 08:50:57 5438
Bishop 08:46:11 -53.7 Dark Up 66.6 200.9 Up 08:41:27 - 08:50:55 5356
Beatty 08:46:06 -53.5 Dark Up 66.5 205.0 Up 08:41:22 - 08:50:50 5256
Dunrhomin 08:45:19 -45.5 Dark Down 58.7 222.8 Up 08:40:35 - 08:50:03 5255
Nikitin 08:45:19 -45.6 Dark Down 58.9 223.0 Up 08:40:35 - 08:50:03 5237
CU-SBO 08:45:19 -45.7 Dark Up 59.0 223.0 Up 08:40:35 - 08:50:03 5232
Wildwood 08:46:18 -56.7 Dark Up 69.7 203.5 Up 08:41:34 - 08:51:02 5041
Patrick 08:45:57 -53.5 Dark Up 66.7 213.0 Up 08:41:13 - 08:50:41 5015
Laughlin/Bullhead City 08:46:00 -54.0 Dark Up 67.2 211.8 Up 08:41:16 - 08:50:44 5013
Idyllwild 08:46:11 -56.2 Dark Up 69.3 208.7 Up 08:41:27 - 08:50:55 4941
Lake Havasu City 08:46:00 -54.4 Dark Up 67.7 213.2 Up 08:41:16 - 08:50:44 4937
Calipatria 08:46:07 -56.1 Dark Up 69.4 212.4 Up 08:41:23 - 08:50:51 4839
George/Scottsdale 08:45:51 -53.8 Dark Up 67.1 219.6 Up 08:41:07 - 08:50:35 4780
Yuma 08:46:04 -56.0 Dark Up 69.3 215.1 Up 08:41:20 - 08:50:48 4766

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 576357, (2025/10/03 08:48UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 49.84 109
6Bet Ari       01:54:38.6 +20:48:26  2.6 12.39  74
72 Psc         01:05:05.4 +14:56:47  5.7  0.78  61
PPM 117038     01:05:56.6 +15:22:55  7.8  0.57  62
PPM 117076     01:08:11.8 +15:07:33  9.3  0.06  62
576357         01:08:09.7 +15:11:17 13.5        62
Positions are for J2000

Event circumstances last updated at 2023/10/06 03:06:46 UT

Marc W. Buie, Southwest Research Institute

RECON