RECON: TNO occultation with 500832

Event between (500832) 13GZ136 and star GA0760:05373550 with event index number of 2328290

Geocentric closest approach at 2025/05/19 06:47:32 UTC

J2000 position of star is 15:46:55.5 -12:01:09
Equinox of date position of star is 15:48:13.4 -12:05:26
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 77 degrees from the moon. Moon is 63% illuminated.
Apparent brightness V=23.5

[RECON map]
Object is 34.2 AU from the Sun and 33.2 AU from the Earth.
Apparent velocity is 23.4 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 143 seconds.
The 1-sigma cross-track error in the shadow position is 1919 km.
The sky-plane scale is 24054.9 km/arcsec.

The object has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 5.9 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 500832, (2025/05/19 06:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:58.1 -26:29:10  0.9 17.54  64
27Bet Lib      15:18:22.6 -09:28:30  2.6  7.81  85
PPM 230856     15:53:03.7 -14:12:30  6.2  2.41  75
PPM 230863     15:53:21.4 -12:36:43  7.7  1.33  76
PPM 230737     15:48:12.3 -11:59:50  9.3  0.10  77
500832         15:48:19.6 -12:05:47 16.9        77
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 13.6 km RECON observability=1.0 and success probability=22.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:48:55 -18.0 Dark Down 25.8 176.5 Low 06:36:30 - 07:01:19 -678
Kamloops 06:49:34 -17.9 AT Down 25.5 161.0 Low 06:37:10 - 07:01:59 -1076
Kelowna 06:49:32 -18.8 Dark Down 26.4 161.8 Low 06:37:08 - 07:01:57 -1102
Peachland 06:49:33 -18.9 Dark Down 26.5 161.5 Low 06:37:09 - 07:01:58 -1115
Summerland 06:49:32 -19.1 Dark Down 26.6 161.5 Low 06:37:08 - 07:01:57 -1122
Penticton 06:49:33 -19.1 Dark Down 26.7 161.7 Low 06:37:08 - 07:01:57 -1123
Oliver 06:49:33 -19.5 Dark Down 27.0 161.6 Low 06:37:08 - 07:01:57 -1144
Anarchist Mountain Observatory 06:49:32 -19.7 Dark Down 27.3 161.8 Low 06:37:08 - 07:01:57 -1148
Okanogan 06:49:33 -20.3 Dark Down 27.8 161.4 Low 06:37:08 - 07:01:57 -1193
Brewster 06:49:34 -20.5 Dark Down 28.0 161.2 Low 06:37:10 - 07:01:59 -1215
Manson/Chelan 06:49:35 -20.6 Dark Down 28.2 160.7 Low 06:37:10 - 07:01:59 -1236
Wenatchee 06:49:36 -21.0 Dark Down 28.6 160.5 Low 06:37:11 - 07:02:00 -1270
Victoria 06:49:44 -19.3 Dark Down 26.8 157.4 Low 06:37:19 - 07:02:08 -1280
Ellensburg 06:49:36 -21.4 Dark Down 28.9 160.2 Low 06:37:12 - 07:02:01 -1301
PNWRO 06:49:32 -22.7 Dark Down 30.2 161.8 Up 06:37:07 - 07:01:56 -1321
Yakima 06:49:36 -21.8 Dark Down 29.3 160.1 Low 06:37:11 - 07:02:00 -1328
Dunrhomin 06:48:47 -29.9 Dark Down 37.7 176.9 Up 06:36:22 - 07:01:11 -1336
Toppenish/White Swan 06:49:36 -22.0 Dark Down 29.5 160.2 Low 06:37:12 - 07:02:01 -1337
Nikitin 06:48:46 -30.1 Dark Down 37.9 176.9 Up 06:36:22 - 07:01:11 -1349
CU-SBO 06:48:46 -30.1 Dark Down 37.9 176.8 Up 06:36:22 - 07:01:11 -1355
The Dalles 06:49:38 -22.6 Dark Down 30.1 159.2 Up 06:37:14 - 07:02:03 -1408
Maupin 06:49:38 -23.0 Dark Down 30.5 159.2 Up 06:37:14 - 07:02:03 -1432
Sisters 06:49:40 -23.7 Dark Down 31.2 158.5 Up 06:37:15 - 07:02:04 -1504
Bend 06:49:39 -24.0 Dark Down 31.5 158.7 Up 06:37:15 - 07:02:04 -1512
Oregon Observatory 06:49:40 -24.1 Dark Down 31.6 158.6 Up 06:37:15 - 07:02:04 -1528
Chiloquin 06:49:41 -25.3 Dark Down 32.7 157.8 Up 06:37:17 - 07:02:06 -1629
Klamath Falls 06:49:41 -25.6 Dark Down 33.0 157.8 Up 06:37:16 - 07:02:05 -1651
Cedarville 06:49:36 -26.7 Dark Down 34.1 159.4 Up 06:37:12 - 07:02:01 -1654
Fall River/Burney 06:49:40 -26.8 Dark Down 34.2 157.9 Up 06:37:16 - 07:02:05 -1724
Gimple 06:49:38 -27.8 Dark Down 35.2 158.3 Up 06:37:14 - 07:02:03 -1774
Greenville 06:49:39 -27.8 Dark Down 35.2 158.2 Up 06:37:14 - 07:02:03 -1776
Portola 06:49:37 -28.2 Dark Down 35.7 158.7 Up 06:37:12 - 07:02:01 -1786
Reno 06:49:35 -28.6 Dark Down 36.1 159.3 Up 06:37:11 - 07:02:00 -1786
Quincy 06:49:39 -28.0 Dark Down 35.4 158.2 Up 06:37:14 - 07:02:03 -1791
Yerington 06:49:33 -29.3 Dark Down 36.8 160.0 Up 06:37:09 - 07:01:58 -1808
Carson City 06:49:35 -29.0 Dark Down 36.4 159.3 Up 06:37:11 - 07:02:00 -1812
Hawthorne 06:49:31 -29.9 Dark Down 37.3 160.5 Up 06:37:07 - 07:01:56 -1826
Gardnerville 06:49:35 -29.2 Dark Down 36.7 159.3 Up 06:37:10 - 07:01:59 -1828
Lee Vining 06:49:33 -30.3 Dark Down 37.7 159.7 Up 06:37:09 - 07:01:58 -1882
Beatty 06:49:25 -31.8 Dark Down 39.4 162.3 Up 06:37:00 - 07:01:49 -1892
Bishop 06:49:30 -31.0 Dark Down 38.5 160.4 Up 06:37:06 - 07:01:55 -1906
Patrick 06:49:14 -33.8 Dark Down 41.4 165.5 Up 06:36:50 - 07:01:39 -1919
Laughlin/Bullhead City 06:49:16 -33.9 Dark Down 41.5 164.5 Up 06:36:52 - 07:01:41 -1959
George/Scottsdale 06:49:06 -35.8 Dark Down 43.5 167.7 Up 06:36:41 - 07:01:30 -1989
Lake Havasu City 06:49:15 -34.6 Dark Down 42.2 164.7 Up 06:36:51 - 07:01:40 -2003
Idyllwild 06:49:24 -34.9 Dark Down 42.4 161.5 Up 06:36:59 - 07:01:48 -2134
Calipatria 06:49:19 -35.7 Dark Down 43.3 162.8 Up 06:36:55 - 07:01:44 -2147
Yuma 06:49:15 -36.3 Dark Down 43.9 163.8 Up 06:36:51 - 07:01:40 -2153
Wildwood 06:49:30 -34.1 Dark Down 41.5 159.2 Up 06:37:06 - 07:01:55 -2164

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 500832, (2025/05/19 06:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.54  64
27Bet Lib      15:17:00.3 -09:22:59  2.6  7.81  85
PPM 230856     15:51:38.4 -14:08:01  6.2  2.41  75
PPM 230863     15:51:57.0 -12:32:15  7.7  1.33  76
PPM 230737     15:46:48.2 -11:55:12  9.3  0.10  77
500832         15:46:55.5 -12:01:09 16.9        77
Positions are for J2000

Event circumstances last updated at 2023/07/05 02:36:00 UT

Marc W. Buie, Southwest Research Institute

RECON