RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star GA1060:07150156 with event index number of 1505383

Geocentric closest approach at 2026/05/29 07:40:32 UTC

J2000 position of star is 18:56:26.4 +16:41:29
Equinox of date position of star is 18:57:18.6 +16:43:05
Stellar brightness G=14.9, use SENSEUP=128
Star is 72 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=21.4

[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 188 seconds.
The 1-sigma cross-track error in the shadow position is 3753 km.
The sky-plane scale is 18993.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 10.9 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.4 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 +16:48:37  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 4.8 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=1.0 and success probability=12.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:43:49 -18.4 Dark Up 43.4 120.7 Up 07:28:49 - 07:58:49 -748
Summerland 07:43:50 -18.7 Dark Up 43.4 120.1 Up 07:28:50 - 07:58:50 -785
Penticton 07:43:50 -18.8 Dark Up 43.5 120.2 Up 07:28:50 - 07:58:50 -789
Okanagan Falls 07:43:49 -19.0 Dark Up 43.6 120.0 Up 07:28:49 - 07:58:49 -809
Oliver 07:43:50 -19.1 Dark Up 43.7 119.9 Up 07:28:50 - 07:58:50 -826
Anarchist Mountain Observatory 07:43:49 -19.3 Dark Up 43.9 120.0 Up 07:28:49 - 07:58:49 -840
Oroville 07:43:49 -19.4 Dark Up 43.9 119.8 Up 07:28:49 - 07:58:49 -849
Tonasket 07:43:49 -19.6 Dark Up 44.0 119.6 Up 07:28:49 - 07:58:49 -873
Okanogan 07:43:50 -19.9 Dark Up 44.1 119.2 Up 07:28:50 - 07:58:50 -911
Brewster 07:43:50 -20.2 Dark Up 44.1 118.8 Up 07:28:50 - 07:58:50 -944
Manson/Chelan 07:43:51 -20.4 Dark Up 44.0 118.2 Up 07:28:51 - 07:58:51 -973
Entiat 07:43:51 -20.6 Dark Up 44.1 117.9 Up 07:28:51 - 07:58:51 -997
Wenatchee 07:43:51 -20.9 Dark Up 44.1 117.6 Up 07:28:51 - 07:58:51 -1026
Ellensburg 07:43:52 -21.3 Dark Up 44.2 117.0 Up 07:28:52 - 07:58:52 -1074
Yakima 07:43:51 -21.7 Dark Up 44.3 116.7 Up 07:28:51 - 07:58:51 -1117
Pasco 07:43:48 -22.1 Dark Up 45.4 117.8 Up 07:28:48 - 07:58:48 -1123
Toppenish/White Swan 07:43:51 -21.9 Dark Up 44.5 116.6 Up 07:28:51 - 07:58:51 -1136
PNWRO 07:43:47 -22.3 Dark Up 45.6 117.9 Up 07:28:47 - 07:58:47 -1144
George/Umatilla 07:43:49 -22.4 Dark Up 45.4 117.3 Up 07:28:49 - 07:58:49 -1162
Goldendale 07:43:52 -22.4 Dark Up 44.5 115.7 Up 07:28:52 - 07:58:52 -1203
The Dalles 07:43:53 -22.6 Dark Up 44.4 115.2 Up 07:28:53 - 07:58:53 -1234
Maupin 07:43:53 -23.1 Dark Up 44.6 114.9 Up 07:28:53 - 07:58:53 -1276
Madras/Culver 07:43:52 -23.6 Dark Up 44.8 114.4 Up 07:28:52 - 07:58:52 -1335
Niwot 07:43:03 -27.4 Dark Up 57.1 127.7 Up 07:28:03 - 07:58:03 -1373
Redmond 07:43:52 -24.0 Dark Up 44.9 114.0 Up 07:28:52 - 07:58:52 -1374
Sisters 07:43:53 -23.9 Dark Up 44.7 113.6 Up 07:28:53 - 07:58:53 -1379
SwRI 07:43:03 -27.5 Dark Up 57.1 127.4 Up 07:28:03 - 07:58:03 -1386
Bend 07:43:53 -24.2 Dark Up 44.9 113.6 Up 07:28:53 - 07:58:53 -1399
Oregon Observatory 07:43:53 -24.3 Dark Up 44.9 113.4 Up 07:28:53 - 07:58:53 -1421
La Pine/Gilchrist 07:43:53 -24.5 Dark Up 45.0 113.1 Up 07:28:53 - 07:58:53 -1444
North Lake 07:43:51 -25.0 Dark Up 45.5 113.3 Up 07:28:51 - 07:58:51 -1477
Paisley 07:43:49 -25.6 Dark Up 46.0 113.1 Up 07:28:49 - 07:58:49 -1529
Chiloquin 07:43:53 -25.6 Dark Up 45.2 111.7 Up 07:28:53 - 07:58:53 -1569
Lakeview 07:43:49 -26.1 Dark Up 46.3 112.8 Up 07:28:49 - 07:58:49 -1578
Klamath Falls 07:43:53 -26.0 Dark Up 45.3 111.5 Up 07:28:53 - 07:58:53 -1604
Tulelake 07:43:52 -26.2 Dark Up 45.6 111.5 Up 07:28:52 - 07:58:52 -1627
Cedarville 07:43:49 -26.7 Dark Up 46.7 112.3 Up 07:28:49 - 07:58:49 -1644
Fall River/Burney 07:43:51 -27.2 Dark Up 46.0 110.7 Up 07:28:51 - 07:58:51 -1722
Susanville 07:43:49 -27.8 Dark Up 46.8 110.8 Up 07:28:49 - 07:58:49 -1774
Gimple 07:43:49 -28.1 Dark Up 46.7 110.3 Up 07:28:49 - 07:58:49 -1808
Greenville 07:43:50 -28.1 Dark Up 46.7 110.2 Up 07:28:50 - 07:58:50 -1810
Quincy 07:43:49 -28.3 Dark Up 46.7 110.0 Up 07:28:49 - 07:58:49 -1831
Portola 07:43:48 -28.4 Dark Up 47.1 110.4 Up 07:28:48 - 07:58:48 -1834
Reno 07:43:46 -28.7 Dark Up 47.7 110.7 Up 07:28:46 - 07:58:46 -1848
Carson City 07:43:46 -29.1 Dark Up 47.8 110.3 Up 07:28:46 - 07:58:46 -1886
Yerington 07:43:44 -29.3 Dark Up 48.3 110.7 Up 07:28:44 - 07:58:44 -1892
Gardnerville 07:43:45 -29.3 Dark Up 47.9 110.1 Up 07:28:45 - 07:58:45 -1911
Hawthorne 07:43:42 -29.8 Dark Up 48.9 110.7 Up 07:28:42 - 07:58:42 -1928
Tonopah 07:43:37 -30.3 Dark Up 50.1 111.5 Up 07:28:37 - 07:58:37 -1943
Lee Vining 07:43:43 -30.4 Dark Up 48.7 109.7 Up 07:28:43 - 07:58:43 -2000
Bishop 07:43:40 -31.0 Dark Up 49.4 109.7 Up 07:28:40 - 07:58:40 -2046
Beatty 07:43:35 -31.5 Dark Up 50.8 110.6 Up 07:28:35 - 07:58:35 -2054
Indian Springs 07:43:31 -31.8 Dark Up 51.7 111.3 Up 07:28:31 - 07:58:31 -2059
Henderson 07:43:28 -32.3 Dark Up 52.4 111.3 Up 07:28:28 - 07:58:28 -2096
Lone Pine 07:43:38 -31.7 Dark Up 49.9 109.1 Up 07:28:38 - 07:58:38 -2119
Patrick 07:43:24 -32.9 Dark Up 53.5 111.6 Up 07:28:24 - 07:58:24 -2131
DCO 07:43:23 -33.2 Dark Up 54.1 111.9 Up 07:28:23 - 07:58:23 -2142
Searchlight/Boulder City 07:43:29 -32.9 Dark Up 52.7 110.7 Up 07:28:29 - 07:58:29 -2155
Kingman/Dolan Springs 07:43:25 -33.1 Dark Up 53.4 111.1 Up 07:28:25 - 07:58:25 -2159
Laughlin/Bullhead City 07:43:27 -33.2 Dark Up 53.1 110.6 Up 07:28:27 - 07:58:27 -2177
Mohave Valley 07:43:26 -33.4 Dark Up 53.1 110.3 Up 07:28:26 - 07:58:26 -2205
Lake Havasu City 07:43:25 -33.8 Dark Up 53.5 110.0 Up 07:28:25 - 07:58:25 -2240
Parker 07:43:24 -34.2 Dark Up 53.6 109.6 Up 07:28:24 - 07:58:24 -2276
CPSLO 07:43:45 -32.9 Dark Up 48.3 105.5 Up 07:28:45 - 07:58:45 -2321
Blythe 07:43:24 -34.7 Dark Up 53.6 108.6 Up 07:28:24 - 07:58:24 -2340
Idyllwild 07:43:31 -34.6 Dark Up 51.9 106.9 Up 07:28:31 - 07:58:31 -2388
Wildwood 07:43:37 -34.2 Dark Up 50.3 105.8 Up 07:28:37 - 07:58:37 -2400
Calipatria 07:43:27 -35.2 Dark Up 53.0 107.2 Up 07:28:27 - 07:58:27 -2419
Yuma 07:43:24 -35.6 Dark Up 53.8 107.4 Up 07:28:24 - 07:58:24 -2439

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 2019/06/11 22:32:16 UT

Marc W. Buie, Southwest Research Institute

RECON