RECON: TNO occultation with 471210

Event between (471210) 10VW11 and star GA0840:00561819 with event index number of 2460393

Geocentric closest approach at 2025/12/14 03:22:29 UTC

J2000 position of star is 05:16:46.8 -05:11:02
Equinox of date position of star is 05:17:58.3 -05:09:32
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 29% illuminated.
Apparent brightness V=21.1

[RECON map]
Object is 37.0 AU from the Sun and 36.2 AU from the Earth.
Apparent velocity is 24.7 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 63 seconds.
The 1-sigma cross-track error in the shadow position is 1322 km.
The sky-plane scale is 26218.5 km/arcsec.

The object has an absolute magnitude Hv=5.4
Diameter=485.3 km assuming a 5% albedo -- 20.1 sec chord
Diameter=198.1 km assuming a 30% albedo -- 8.2 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 471210, (2025/12/14 03:21UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:47.2 -08:10:25  0.1  3.07 114
67Bet Eri      05:09:07.6 -05:03:17  2.8  2.23 117
PPM 187804     05:14:04.4 -06:01:42  6.1  1.32 115
PPM 187887     05:18:04.6 -05:07:29  8.5  0.03 115
471210         05:18:03.5 -05:09:26 15.6       114
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 32.7 km RECON observability=0.2 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)
Sleaford 03:24:28 -40.3 Dark Down 18.3 125.5 Really Low 03:18:46 - 03:30:11 -1348
Kamloops 03:24:54 -31.7 Dark Down 11.2 112.8 Really Low 03:19:11 - 03:30:36 -1505
Kelowna 03:24:55 -32.3 Dark Down 12.0 113.3 Really Low 03:19:13 - 03:30:38 -1554
Peachland 03:24:56 -32.1 Dark Down 11.9 113.1 Really Low 03:19:14 - 03:30:39 -1563
Summerland 03:24:56 -32.2 Dark Down 12.0 113.1 Really Low 03:19:14 - 03:30:39 -1572
Penticton 03:24:57 -32.2 Dark Down 12.1 113.2 Really Low 03:19:14 - 03:30:39 -1576
Oliver 03:24:58 -32.2 Dark Down 12.3 113.1 Really Low 03:19:15 - 03:30:40 -1600
Anarchist Mountain Observatory 03:24:58 -32.4 Dark Down 12.4 113.3 Really Low 03:19:15 - 03:30:40 -1610
Okanogan 03:25:00 -32.2 Dark Down 12.6 113.0 Really Low 03:19:18 - 03:30:43 -1656
Victoria 03:25:04 -29.7 Dark Down 10.2 110.0 Really Low 03:19:22 - 03:30:47 -1666
Brewster 03:25:01 -32.1 Dark Down 12.6 112.8 Really Low 03:19:19 - 03:30:44 -1676
Manson/Chelan 03:25:02 -31.9 Dark Down 12.4 112.4 Really Low 03:19:20 - 03:30:45 -1692
Wenatchee 03:25:04 -31.7 Dark Down 12.5 112.2 Really Low 03:19:22 - 03:30:47 -1727
Ellensburg 03:25:06 -31.6 Dark Down 12.5 111.9 Really Low 03:19:23 - 03:30:48 -1757
Yakima 03:25:07 -31.6 Dark Down 12.7 111.8 Really Low 03:19:24 - 03:30:49 -1786
Toppenish/White Swan 03:25:07 -31.7 Dark Down 12.8 111.9 Really Low 03:19:25 - 03:30:50 -1801
PNWRO 03:25:06 -32.7 Dark Down 13.9 113.0 Really Low 03:19:24 - 03:30:49 -1819
The Dalles 03:25:11 -31.1 Dark Down 12.6 111.2 Really Low 03:19:28 - 03:30:53 -1862
Maupin 03:25:12 -31.2 Dark Down 12.8 111.2 Really Low 03:19:29 - 03:30:54 -1892
Sisters 03:25:15 -30.8 Dark Down 12.8 110.6 Really Low 03:19:32 - 03:30:57 -1960
Bend 03:25:15 -31.0 Dark Down 13.1 110.8 Really Low 03:19:33 - 03:30:58 -1976
Oregon Observatory 03:25:16 -30.9 Dark Down 13.1 110.6 Really Low 03:19:33 - 03:30:58 -1990
Chiloquin 03:25:20 -30.5 Dark Down 13.3 110.0 Really Low 03:19:38 - 03:31:03 -2093
Klamath Falls 03:25:21 -30.5 Dark Down 13.4 110.0 Really Low 03:19:39 - 03:31:04 -2119
Cedarville 03:25:21 -31.7 Dark Down 14.8 111.0 Really Low 03:19:39 - 03:31:04 -2164
Dunrhomin 03:24:57 -42.9 Dark Down 25.4 122.3 Low 03:19:15 - 03:30:40 -2182
Nikitin 03:24:58 -42.9 Dark Down 25.5 122.2 Low 03:19:15 - 03:30:40 -2196
CU-SBO 03:24:58 -42.9 Dark Down 25.5 122.1 Low 03:19:15 - 03:30:40 -2202
Fall River/Burney 03:25:24 -30.7 Dark Down 14.1 110.0 Really Low 03:19:42 - 03:31:07 -2210
Gimple 03:25:26 -31.0 Dark Down 14.8 110.2 Really Low 03:19:43 - 03:31:08 -2279
Greenville 03:25:26 -31.0 Dark Down 14.8 110.1 Really Low 03:19:43 - 03:31:08 -2280
Quincy 03:25:26 -31.0 Dark Down 14.8 110.1 Really Low 03:19:44 - 03:31:09 -2296
Portola 03:25:26 -31.3 Dark Down 15.2 110.4 Really Low 03:19:44 - 03:31:09 -2303
Reno 03:25:26 -31.8 Dark Down 15.8 110.8 Really Low 03:19:43 - 03:31:08 -2320
Carson City 03:25:27 -31.8 Dark Down 15.9 110.7 Really Low 03:19:44 - 03:31:09 -2350
Yerington 03:25:26 -32.2 Dark Down 16.5 111.1 Really Low 03:19:44 - 03:31:09 -2362
Gardnerville 03:25:27 -31.8 Dark Down 16.0 110.7 Really Low 03:19:45 - 03:31:10 -2369
Hawthorne 03:25:27 -32.6 Dark Down 17.0 111.4 Really Low 03:19:44 - 03:31:09 -2397
Lee Vining 03:25:29 -32.2 Dark Down 16.9 110.9 Really Low 03:19:46 - 03:31:11 -2446
Bishop 03:25:29 -32.7 Dark Down 17.6 111.2 Really Low 03:19:47 - 03:31:12 -2492
Beatty 03:25:28 -33.9 Dark Down 19.0 112.2 Really Low 03:19:45 - 03:31:10 -2521
Patrick 03:25:26 -36.1 Dark Down 21.7 113.7 Low 03:19:43 - 03:31:08 -2630
Laughlin/Bullhead City 03:25:28 -35.6 Dark Down 21.3 113.2 Low 03:19:45 - 03:31:10 -2656
Lake Havasu City 03:25:29 -35.7 Dark Down 21.8 113.1 Low 03:19:46 - 03:31:11 -2712
George/Scottsdale 03:25:26 -37.7 Dark Down 23.9 114.5 Low 03:19:43 - 03:31:08 -2765
Wildwood 03:25:37 -32.2 Dark Down 18.6 110.1 Really Low 03:19:55 - 03:31:20 -2775
Idyllwild 03:25:35 -33.7 Dark Down 20.2 111.2 Low 03:19:52 - 03:31:17 -2793
Calipatria 03:25:34 -34.6 Dark Down 21.4 111.8 Low 03:19:52 - 03:31:17 -2841
Yuma 03:25:33 -35.3 Dark Down 22.2 112.2 Low 03:19:51 - 03:31:16 -2873

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 471210, (2025/12/14 03:21UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1  3.07 114
67Bet Eri      05:07:50.8 -05:05:13  2.8  2.23 117
PPM 187804     05:12:48.2 -06:03:27  6.1  1.32 115
PPM 187887     05:16:47.8 -05:09:05  8.5  0.03 115
471210         05:16:46.8 -05:11:02 15.6       115
Positions are for J2000

Event circumstances last updated at 2024/03/04 05:37:19 UT

Marc W. Buie, Southwest Research Institute

RECON