RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star GA1060:07150156 with event index number of 2229520

Geocentric closest approach at 2026/05/29 07:41:03 UTC

J2000 position of star is 18:56:26.4 +16:41:29
Equinox of date position of star is 18:57:26.3 +16:43:19
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 26.8 AU from the Sun and 26.2 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is 1404 km.
The sky-plane scale is 18993.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=209.9 km assuming a 5% albedo -- 9.5 sec chord
Diameter=85.7 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470309, (2026/05/29 07:41UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:49.9 +38:48:33  0.0 22.50  81
Tarazed        19:47:30.9 +10:40:46  2.7 13.54  80
PPM 135550     18:59:25.3 +17:23:53  6.2  0.80  73
PPM 135496     18:57:15.8 +16:48:36  9.1  0.12  72
470309         18:57:37.3 +16:43:40 14.9        72
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 28.5 km RECON observability=1.0 and success probability=35.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:43:48 -15.7 AT Up 48.6 138.5 Up 07:37:41 - 07:49:56 -123
Kamloops 07:44:22 -17.6 AT Up 42.6 120.4 Up 07:38:15 - 07:50:30 -594
Kelowna 07:44:20 -18.5 Dark Up 43.5 120.7 Up 07:38:12 - 07:50:27 -661
Peachland 07:44:21 -18.6 Dark Up 43.4 120.3 Up 07:38:13 - 07:50:28 -678
Summerland 07:44:20 -18.7 Dark Up 43.5 120.3 Up 07:38:13 - 07:50:28 -692
Penticton 07:44:20 -18.8 Dark Up 43.6 120.3 Up 07:38:13 - 07:50:28 -696
Oliver 07:44:20 -19.1 Dark Up 43.8 120.0 Up 07:38:13 - 07:50:28 -733
Anarchist Mountain Observatory 07:44:19 -19.3 Dark Up 44.0 120.1 Up 07:38:12 - 07:50:27 -747
Tonasket 07:44:20 -19.6 Dark Up 44.1 119.8 Up 07:38:13 - 07:50:28 -780
Okanogan 07:44:20 -20.0 Dark Up 44.2 119.3 Up 07:38:12 - 07:50:27 -818
Brewster 07:44:20 -20.2 Dark Up 44.2 118.9 Up 07:38:13 - 07:50:28 -851
Victoria 07:44:29 -19.6 Dark Up 41.9 115.5 Up 07:38:22 - 07:50:37 -874
Manson/Chelan 07:44:21 -20.4 Dark Up 44.1 118.3 Up 07:38:14 - 07:50:29 -880
Wenatchee 07:44:21 -20.9 Dark Up 44.2 117.7 Up 07:38:14 - 07:50:29 -933
Ellensburg 07:44:22 -21.3 Dark Up 44.2 117.2 Up 07:38:15 - 07:50:30 -981
Yakima 07:44:22 -21.7 Dark Up 44.4 116.8 Up 07:38:15 - 07:50:30 -1024
Toppenish/White Swan 07:44:21 -21.9 Dark Up 44.6 116.8 Up 07:38:14 - 07:50:29 -1043
PNWRO 07:44:18 -22.3 Dark Up 45.7 118.0 Up 07:38:10 - 07:50:25 -1051
Goldendale 07:44:22 -22.4 Dark Up 44.6 115.9 Up 07:38:14 - 07:50:29 -1110
The Dalles 07:44:23 -22.6 Dark Up 44.5 115.3 Up 07:38:15 - 07:50:30 -1141
Maupin 07:44:23 -23.1 Dark Up 44.7 115.0 Up 07:38:15 - 07:50:30 -1183
Dunrhomin 07:43:34 -27.2 Dark Up 57.1 128.0 Up 07:37:26 - 07:49:41 -1263
Sisters 07:44:24 -23.9 Dark Up 44.8 113.7 Up 07:38:16 - 07:50:31 -1286
CU-SBO 07:43:34 -27.5 Dark Up 57.2 127.6 Up 07:37:26 - 07:49:41 -1291
Bend 07:44:23 -24.2 Dark Up 45.0 113.8 Up 07:38:16 - 07:50:31 -1306
Oregon Observatory 07:44:24 -24.3 Dark Up 45.0 113.5 Up 07:38:16 - 07:50:31 -1327
North Lake 07:44:21 -25.0 Dark Up 45.6 113.4 Up 07:38:14 - 07:50:29 -1384
Chiloquin 07:44:24 -25.6 Dark Up 45.2 111.9 Up 07:38:16 - 07:50:31 -1476
Lakeview 07:44:19 -26.1 Dark Up 46.4 112.9 Up 07:38:12 - 07:50:27 -1485
Klamath Falls 07:44:24 -26.0 Dark Up 45.4 111.6 Up 07:38:16 - 07:50:31 -1511
Cedarville 07:44:19 -26.8 Dark Up 46.8 112.5 Up 07:38:11 - 07:50:26 -1551
Fall River/Burney 07:44:22 -27.2 Dark Up 46.1 110.8 Up 07:38:14 - 07:50:29 -1629
Susanville 07:44:20 -27.8 Dark Up 46.9 110.9 Up 07:38:12 - 07:50:27 -1680
Gimple 07:44:19 -28.1 Dark Up 46.8 110.4 Up 07:38:12 - 07:50:27 -1715
Greenville 07:44:20 -28.1 Dark Up 46.7 110.4 Up 07:38:12 - 07:50:27 -1716
Quincy 07:44:20 -28.3 Dark Up 46.8 110.2 Up 07:38:13 - 07:50:28 -1738
Portola 07:44:19 -28.5 Dark Up 47.2 110.5 Up 07:38:12 - 07:50:27 -1741
Reno 07:44:16 -28.7 Dark Up 47.8 110.8 Up 07:38:09 - 07:50:24 -1754
Carson City 07:44:16 -29.1 Dark Up 47.9 110.4 Up 07:38:09 - 07:50:24 -1792
Yerington 07:44:14 -29.3 Dark Up 48.4 110.8 Up 07:38:06 - 07:50:21 -1798
Gardnerville 07:44:16 -29.4 Dark Up 48.0 110.2 Up 07:38:08 - 07:50:23 -1817
Hawthorne 07:44:12 -29.8 Dark Up 49.0 110.8 Up 07:38:05 - 07:50:20 -1835
Tonopah 07:44:08 -30.3 Dark Up 50.2 111.7 Up 07:38:00 - 07:50:15 -1849
Lee Vining 07:44:13 -30.4 Dark Up 48.8 109.8 Up 07:38:05 - 07:50:20 -1907
Bishop 07:44:10 -31.0 Dark Up 49.5 109.8 Up 07:38:03 - 07:50:18 -1953
Beatty 07:44:05 -31.5 Dark Up 50.9 110.8 Up 07:37:58 - 07:50:13 -1960
Indian Springs 07:44:01 -31.8 Dark Up 51.8 111.4 Up 07:37:54 - 07:50:09 -1965
Henderson 07:43:59 -32.3 Dark Up 52.5 111.4 Up 07:37:52 - 07:50:07 -2002
Patrick 07:43:56 -32.9 Dark Up 53.6 111.7 Up 07:37:48 - 07:50:03 -2037
Kingman/Dolan Springs 07:43:55 -33.1 Dark Up 53.5 111.3 Up 07:37:47 - 07:50:02 -2065
Laughlin/Bullhead City 07:43:56 -33.2 Dark Up 53.1 110.7 Up 07:37:49 - 07:50:04 -2083
Mohave Valley 07:43:56 -33.4 Dark Up 53.2 110.4 Up 07:37:49 - 07:50:04 -2111
Lake Havasu City 07:43:55 -33.8 Dark Up 53.6 110.1 Up 07:37:48 - 07:50:03 -2146
George/Scottsdale 07:43:47 -34.5 Dark Up 55.7 111.5 Up 07:37:39 - 07:49:54 -2153
Parker 07:43:55 -34.2 Dark Up 53.7 109.7 Up 07:37:48 - 07:50:03 -2182
Idyllwild 07:44:02 -34.6 Dark Up 52.0 107.0 Up 07:37:54 - 07:50:09 -2294
Wildwood 07:44:07 -34.2 Dark Up 50.4 105.9 Up 07:38:00 - 07:50:15 -2306
Calipatria 07:43:57 -35.2 Dark Up 53.1 107.3 Up 07:37:50 - 07:50:05 -2325
Yuma 07:43:54 -35.6 Dark Up 53.9 107.5 Up 07:37:46 - 07:50:01 -2345

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 470309, (2026/05/29 07:41UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 22.50  81
Tarazed        19:46:15.6 +10:36:48  2.7 13.54  80
PPM 135550     18:58:14.7 +17:21:39  6.2  0.80  73
PPM 135496     18:56:04.9 +16:46:27  9.1  0.12  72
470309         18:56:26.4 +16:41:29 14.9        72
Positions are for J2000

Event circumstances last updated at 2022/04/19 23:05:15 UT

Marc W. Buie, Southwest Research Institute

RECON