RECON: TNO occultation with 470443

Event between (470443) 07XV50 and star GA1240:01809222 with event index number of 2230879

Geocentric closest approach at 2025/01/22 03:27:57 UTC

J2000 position of star is 05:22:09.4 +35:01:56
Equinox of date position of star is 05:23:46.1 +35:03:14
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 133 degrees from the moon. Moon is 47% illuminated.
Apparent brightness V=21.4

[RECON map]
Object is 47.2 AU from the Sun and 46.5 AU from the Earth.
Apparent velocity is 19.5 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 274 seconds.
The 1-sigma cross-track error in the shadow position is 2822 km.
The sky-plane scale is 33699.2 km/arcsec.

The object has an absolute magnitude Hv=4.6
Diameter=717.8 km assuming a 5% albedo -- 36.9 sec chord
Diameter=293.0 km assuming a 30% albedo -- 15.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 470443, (2025/01/22 03:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.7 +16:33:28  0.8 21.21 145
3Iot Aur       04:58:37.8 +33:12:12  2.7  5.53 138
19 Aur         05:21:40.2 +33:58:55  5.0  1.16 134
PPM 070194     05:20:55.5 +34:54:54  7.3  0.61 134
PPM 070242     05:23:11.2 +35:19:43  9.3  0.30 133
PPM 070257     05:23:48.7 +34:57:51 10.3  0.09 133
470443         05:23:49.7 +35:03:16 16.1       133
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 3.3 sigma about the mid-time.
The median site spacing is 32.1 km RECON observability=1.0 and success probability=2.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:29:11 -27.0 Dark Down 65.1 118.5 Up 03:14:11 - 03:44:11 -5846
Kelowna 03:29:11 -27.6 Dark Down 66.0 118.3 Up 03:14:11 - 03:44:11 -5949
Victoria 03:29:26 -25.1 Dark Down 64.2 110.4 Up 03:14:26 - 03:44:26 -5949
Peachland 03:29:12 -27.5 Dark Down 65.9 117.6 Up 03:14:12 - 03:44:12 -5950
Summerland 03:29:12 -27.5 Dark Down 66.0 117.5 Up 03:14:12 - 03:44:12 -5967
Penticton 03:29:12 -27.6 Dark Down 66.1 117.5 Up 03:14:12 - 03:44:12 -5977
Oliver 03:29:14 -27.6 Dark Down 66.2 116.8 Up 03:14:14 - 03:44:14 -6010
Anarchist Mountain Observatory 03:29:14 -27.7 Dark Down 66.4 116.7 Up 03:14:14 - 03:44:14 -6032
Sleaford 03:28:24 -35.7 Dark Down 70.7 147.2 Up 03:13:24 - 03:43:24 -6081
Okanogan 03:29:15 -27.6 Dark Down 66.6 115.1 Up 03:14:15 - 03:44:15 -6086
Brewster 03:29:16 -27.5 Dark Down 66.6 114.2 Up 03:14:16 - 03:44:16 -6105
Manson/Chelan 03:29:18 -27.3 Dark Down 66.4 113.3 Up 03:14:18 - 03:44:18 -6113
Wenatchee 03:29:20 -27.1 Dark Down 66.5 112.1 Up 03:14:20 - 03:44:20 -6153
Ellensburg 03:29:22 -27.0 Dark Down 66.5 110.9 Up 03:14:22 - 03:44:22 -6185
Yakima 03:29:23 -27.0 Dark Down 66.7 110.0 Up 03:14:23 - 03:44:23 -6223
Toppenish/White Swan 03:29:23 -27.1 Dark Down 66.9 109.7 Up 03:14:23 - 03:44:23 -6249
The Dalles 03:29:28 -26.6 Dark Down 66.6 107.1 Up 03:14:28 - 03:44:28 -6297
PNWRO 03:29:19 -28.1 Dark Down 68.0 110.8 Up 03:14:19 - 03:44:19 -6333
Maupin 03:29:29 -26.6 Dark Down 66.8 106.3 Up 03:14:29 - 03:44:29 -6340
Sisters 03:29:33 -26.2 Dark Down 66.7 103.8 Up 03:14:33 - 03:44:33 -6408
Bend 03:29:31 -26.4 Dark Down 66.9 103.5 Up 03:14:31 - 03:44:31 -6440
Oregon Observatory 03:29:35 -26.3 Dark Down 66.9 103.0 Up 03:14:35 - 03:44:35 -6452
Chiloquin 03:29:38 -26.0 Dark Down 66.9 99.5 Up 03:14:38 - 03:44:38 -6564
Klamath Falls 03:29:38 -26.0 Dark Down 67.0 98.8 Up 03:14:38 - 03:44:38 -6600
Cedarville 03:29:35 -27.2 Dark Down 68.3 98.7 Up 03:14:35 - 03:44:35 -6724
Fall River/Burney 03:29:41 -26.2 Dark Down 67.4 96.4 Up 03:14:41 - 03:44:41 -6728
Greenville 03:29:41 -26.5 Dark Down 67.8 94.6 Up 03:14:41 - 03:44:41 -6833
Gimple 03:29:41 -26.6 Dark Down 67.9 94.6 Up 03:14:41 - 03:44:41 -6836
Quincy 03:29:42 -26.5 Dark Down 67.9 94.1 Up 03:14:42 - 03:44:42 -6852
Portola 03:29:41 -26.8 Dark Down 68.2 94.1 Up 03:14:41 - 03:44:41 -6882
Reno 03:29:40 -27.3 Dark Down 68.8 94.0 Up 03:14:40 - 03:44:40 -6932
Carson City 03:29:41 -27.3 Dark Down 68.8 93.1 Up 03:14:41 - 03:44:41 -6968
Gardnerville 03:29:40 -27.3 Dark Down 68.8 92.5 Up 03:14:40 - 03:44:40 -6994
Yerington 03:29:38 -27.8 Dark Down 69.3 93.0 Up 03:14:38 - 03:44:38 -7010
Hawthorne 03:29:38 -28.2 Dark Down 69.7 92.2 Up 03:14:38 - 03:44:38 -7075
Lee Vining 03:29:40 -27.8 Dark Down 69.4 90.3 Up 03:14:40 - 03:44:40 -7114
Bishop 03:29:38 -28.3 Dark Down 69.9 89.2 Up 03:14:38 - 03:44:38 -7200
Beatty 03:29:35 -29.5 Dark Down 71.2 88.8 Up 03:14:35 - 03:44:35 -7305
Dunrhomin 03:28:42 -38.4 Dark Down 79.3 115.5 Up 03:13:42 - 03:43:42 -7313
Nikitin 03:28:42 -38.4 Dark Down 79.4 114.6 Up 03:13:42 - 03:43:42 -7332
CU-SBO 03:28:43 -38.3 Dark Down 79.4 114.1 Up 03:13:43 - 03:43:43 -7336
Wildwood 03:29:48 -27.9 Dark Down 69.5 80.3 Up 03:14:48 - 03:44:48 -7521
Patrick 03:29:27 -31.8 Dark Down 73.4 85.4 Up 03:14:27 - 03:44:27 -7556
Laughlin/Bullhead City 03:29:30 -31.2 Dark Down 72.9 84.4 Up 03:14:30 - 03:44:30 -7557
Idyllwild 03:29:42 -29.4 Dark Down 70.9 79.6 Up 03:14:42 - 03:44:42 -7627
Lake Havasu City 03:29:30 -31.4 Dark Down 73.0 82.3 Up 03:14:30 - 03:44:30 -7635
Calipatria 03:29:37 -30.3 Dark Down 71.8 77.9 Up 03:14:37 - 03:44:37 -7733
George/Scottsdale 03:29:22 -33.3 Dark Down 74.9 79.9 Up 03:14:22 - 03:44:22 -7799
Yuma 03:29:35 -31.0 Dark Down 72.4 76.5 Up 03:14:35 - 03:44:35 -7809

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 470443, (2025/01/22 03:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 21.21 145
3Iot Aur       04:56:59.6 +33:09:58  2.7  5.53 138
19 Aur         05:20:00.9 +33:57:29  5.0  1.16 134
PPM 070194     05:19:15.5 +34:53:27  7.3  0.61 134
PPM 070242     05:21:30.8 +35:18:21  9.3  0.30 133
PPM 070257     05:22:08.5 +34:56:30 10.3  0.09 133
470443         05:22:09.4 +35:01:56 16.1       133
Positions are for J2000

Event circumstances last updated at 2024/03/02 06:05:43 UT

Marc W. Buie, Southwest Research Institute

RECON