RECON: TNO occultation with 47932

Event between (47932) 00GN171 and star GA0560:21179838 with event index number of 2315376

Geocentric closest approach at 2025/03/10 12:40:09 UTC

J2000 position of star is 17:24:07.9 -32:00:36
Equinox of date position of star is 17:25:43.2 -32:01:51
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 135 degrees from the moon. Moon is 87% illuminated.
Apparent brightness V=21.2

[RECON map]
Object is 29.8 AU from the Sun and 29.8 AU from the Earth.
Apparent velocity is 9.3 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 558 seconds.
The 1-sigma cross-track error in the shadow position is 3569 km.
The sky-plane scale is 21617.6 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=346.7 km assuming a 5% albedo -- 36.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 14.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 47932, (2025/03/10 12:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:57.4 -26:29:08  0.9 13.16 123
34Ups Sco      17:32:28.7 -37:18:48  2.7  5.46 136
PPM 296131     17:18:42.2 -32:41:20  5.5  1.63 134
PPM 296294     17:25:55.6 -32:00:22  8.3  0.04 135
47932          17:25:46.1 -32:01:53 15.7       135
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 1.6 sigma about the mid-time.
The median site spacing is 53.8 km RECON observability=0.2 and success probability=3.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:32:02 -9.5 NT Up 5.4 171.1 Really Low 12:17:02 - 12:47:02 3159
Dunrhomin 12:32:13 -9.9 NT Down 17.2 171.4 Really Low 12:17:13 - 12:47:13 2876
Nikitin 12:32:11 -9.9 NT Down 17.4 171.4 Really Low 12:17:11 - 12:47:11 2868
CU-SBO 12:32:11 -10.0 NT Down 17.4 171.3 Really Low 12:17:11 - 12:47:11 2861
Kelowna 12:30:55 -18.4 Dark Up 5.3 159.5 Really Low 12:15:55 - 12:45:55 2407
Kamloops 12:30:52 -18.8 Dark Up 4.4 158.7 Really Low 12:15:52 - 12:45:52 2390
Penticton 12:30:54 -18.6 Dark Up 5.6 159.4 Really Low 12:15:54 - 12:45:54 2390
Peachland 12:30:54 -18.7 Dark Up 5.4 159.2 Really Low 12:15:54 - 12:45:54 2387
Summerland 12:30:52 -18.6 Dark Up 5.5 159.3 Really Low 12:15:52 - 12:45:52 2386
Anarchist Mountain Observatory 12:30:54 -18.6 Dark Up 6.1 159.5 Really Low 12:15:54 - 12:45:54 2380
Oliver 12:30:52 -18.7 Dark Up 5.9 159.3 Really Low 12:15:52 - 12:45:52 2376
Okanogan 12:30:51 -18.9 Dark Up 6.7 159.3 Really Low 12:15:51 - 12:45:51 2343
Brewster 12:30:50 -19.2 Dark Up 6.9 159.1 Really Low 12:15:50 - 12:45:50 2320
Manson/Chelan 12:30:48 -19.5 Dark Up 7.0 158.8 Really Low 12:15:48 - 12:45:48 2292
PNWRO 12:30:52 -19.1 Dark Up 9.1 159.7 Really Low 12:15:52 - 12:45:52 2286
Wenatchee 12:30:45 -19.7 Dark Up 7.4 158.6 Really Low 12:15:45 - 12:45:45 2263
Ellensburg 12:30:45 -20.0 Dark Up 7.7 158.4 Really Low 12:15:45 - 12:45:45 2233
Toppenish/White Swan 12:30:45 -20.0 Dark Up 8.4 158.5 Really Low 12:15:45 - 12:45:45 2215
Yakima 12:30:45 -20.1 Dark Up 8.1 158.4 Really Low 12:15:45 - 12:45:45 2215
George/Scottsdale 12:31:38 -15.8 AT Down 22.5 164.9 Low 12:16:38 - 12:46:38 2182
Victoria 12:30:35 -21.4 Dark Up 5.6 156.1 Really Low 12:15:35 - 12:45:35 2137
The Dalles 12:30:42 -20.8 Dark Up 8.9 157.8 Really Low 12:15:42 - 12:45:42 2135
Patrick 12:31:21 -17.3 AT Down 20.4 163.2 Low 12:16:21 - 12:46:21 2128
Maupin 12:30:41 -20.8 Dark Up 9.3 157.9 Really Low 12:15:41 - 12:45:41 2123
Laughlin/Bullhead City 12:31:17 -18.0 AT Down 20.4 162.6 Low 12:16:17 - 12:46:17 2069
Bend 12:30:38 -21.3 Dark Up 10.2 157.6 Really Low 12:15:38 - 12:45:38 2059
Sisters 12:30:38 -21.4 Dark Up 10.0 157.4 Really Low 12:15:38 - 12:45:38 2054
Lake Havasu City 12:31:19 -17.8 AT Down 21.1 162.7 Low 12:16:19 - 12:46:19 2053
Oregon Observatory 12:30:38 -21.5 Dark Up 10.4 157.5 Really Low 12:15:38 - 12:45:38 2043
Cedarville 12:30:42 -21.2 Dark Up 12.9 158.3 Really Low 12:15:42 - 12:45:42 2011
Beatty 12:31:01 -19.5 Dark Down 18.2 160.8 Really Low 12:16:01 - 12:46:01 2008
Hawthorne 12:30:49 -20.7 Dark Up 16.1 159.4 Really Low 12:15:49 - 12:45:49 1965
Chiloquin 12:30:34 -22.1 Dark Up 11.5 157.0 Really Low 12:15:34 - 12:45:34 1956
Yerington 12:30:48 -21.0 Dark Up 15.6 159.0 Really Low 12:15:48 - 12:45:48 1953
Klamath Falls 12:30:36 -22.2 Dark Up 11.8 157.1 Really Low 12:15:36 - 12:45:36 1944
Yuma 12:31:19 -18.3 Dark Down 22.8 162.2 Low 12:16:19 - 12:46:19 1942
Reno 12:30:45 -21.4 Dark Up 14.9 158.5 Really Low 12:15:45 - 12:45:45 1938
Bishop 12:30:52 -20.7 Dark Up 17.3 159.5 Really Low 12:15:52 - 12:45:52 1923
Carson City 12:30:45 -21.4 Dark Up 15.2 158.5 Really Low 12:15:45 - 12:45:45 1922
Gardnerville 12:30:44 -21.5 Dark Up 15.4 158.5 Really Low 12:15:44 - 12:45:44 1913
Fall River/Burney 12:30:36 -22.2 Dark Up 13.0 157.3 Really Low 12:15:36 - 12:45:36 1910
Portola 12:30:40 -21.8 Dark Up 14.4 157.9 Really Low 12:15:40 - 12:45:40 1909
Lee Vining 12:30:47 -21.2 Dark Up 16.5 158.9 Really Low 12:15:47 - 12:45:47 1905
Calipatria 12:31:14 -19.0 Dark Down 22.1 161.5 Low 12:16:14 - 12:46:14 1902
Gimple 12:30:39 -22.0 Dark Up 14.0 157.6 Really Low 12:15:39 - 12:45:39 1900
Greenville 12:30:37 -22.1 Dark Up 14.0 157.6 Really Low 12:15:37 - 12:45:37 1894
Quincy 12:30:38 -22.1 Dark Up 14.2 157.6 Really Low 12:15:38 - 12:45:38 1884
Idyllwild 12:31:05 -20.0 Dark Down 21.2 160.5 Low 12:16:05 - 12:46:05 1853
Wildwood 12:30:52 -21.5 Dark Down 20.3 158.9 Low 12:15:52 - 12:45:52 1741

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 47932, (2025/03/10 12:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.16 123
34Ups Sco      17:30:45.8 -37:17:46  2.7  5.46 136
PPM 296131     17:17:03.5 -32:39:48  5.5  1.63 134
PPM 296294     17:24:17.4 -31:59:05  8.3  0.04 135
47932          17:24:07.9 -32:00:36 15.7       135
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:43:31 UT

Marc W. Buie, Southwest Research Institute

RECON