RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star GA0960:05808775 with event index number of 1140066

Geocentric closest approach at 2021/05/24 05:39:22 UTC

J2000 position of star is 18:01:11.8 +07:40:42
Equinox of date position of star is 18:02:12.8 +07:40:45
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 62 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=21.4

[RECON map]
TNO is 25.0 AU from the Sun and 24.3 AU from the Earth.
The TNO is moving 23.0 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 41 seconds.
The 1-sigma cross-track error in the shadow position is 930 km.
The sky-plane scale is 17594.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=209.9 km assuming a 5% albedo -- 9.1 sec chord
Diameter=85.7 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 

Star training set for 470309, (2021/05/24 05:39UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:39.8 +38:48:17  0.0 32.13  79
60Bet Oph      17:44:31.8 +04:33:36  2.8  5.39  57
PPM 164995     18:01:55.4 +06:16:09  6.4  1.41  61
PPM 165077     18:04:22.6 +08:25:17  7.3  0.91  62
PPM 164994     18:01:52.3 +07:25:30 10.0  0.27  62
PPM 165000     18:02:09.6 +07:38:06 10.3  0.05  62
470309         18:02:13.8 +07:40:45 16.5        62
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 30.9 km RECON observability=0.8 and success probability=12.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 05:43:15 -13.3 AT Up 23.7 107.5 Low 05:39:19 - 05:47:10 -1203
Kelowna 05:43:16 -13.6 AT Up 23.8 107.2 Low 05:39:20 - 05:47:11 -1245
Peachland 05:43:16 -13.6 AT Up 23.6 106.9 Low 05:39:21 - 05:47:12 -1259
Summerland 05:43:16 -13.7 AT Up 23.7 106.9 Low 05:39:21 - 05:47:12 -1273
Penticton 05:43:16 -13.8 AT Up 23.8 107.0 Low 05:39:21 - 05:47:12 -1279
Oliver 05:43:17 -14.1 AT Up 23.9 106.8 Low 05:39:21 - 05:47:12 -1316
Anarchist Mountain Observatory 05:43:16 -14.3 AT Up 24.1 106.9 Low 05:39:21 - 05:47:12 -1332
Tonasket 05:43:17 -14.6 AT Up 24.1 106.7 Low 05:39:21 - 05:47:12 -1364
Okanogan 05:43:17 -14.8 AT Up 24.1 106.5 Low 05:39:22 - 05:47:13 -1401
Victoria 05:43:23 -13.3 AT Up 21.7 103.4 Low 05:39:27 - 05:47:18 -1413
Brewster 05:43:18 -15.0 AT Up 24.1 106.2 Low 05:39:22 - 05:47:13 -1431
Manson/Chelan 05:43:19 -15.0 AT Up 23.9 105.8 Low 05:39:23 - 05:47:14 -1455
Wenatchee 05:43:20 -15.3 AT Up 23.9 105.5 Low 05:39:24 - 05:47:15 -1507
Ellensburg 05:43:20 -15.6 AT Up 23.9 105.1 Low 05:39:25 - 05:47:16 -1552
Yakima 05:43:21 -16.0 AT Up 24.0 104.9 Low 05:39:26 - 05:47:17 -1595
Toppenish/White Swan 05:43:21 -16.2 AT Up 24.2 105.0 Low 05:39:25 - 05:47:16 -1616
Pasco 05:43:19 -16.8 AT Up 25.0 105.9 Low 05:39:24 - 05:47:15 -1617
PNWRO 05:43:19 -17.1 AT Up 25.3 106.0 Low 05:39:24 - 05:47:15 -1641
Goldendale 05:43:22 -16.5 AT Up 24.0 104.4 Low 05:39:27 - 05:47:18 -1678
The Dalles 05:43:22 -16.6 AT Up 23.8 104.0 Low 05:39:27 - 05:47:18 -1705
Maupin 05:43:23 -16.9 AT Up 24.0 103.9 Low 05:39:28 - 05:47:19 -1748
Redmond 05:43:24 -17.7 AT Up 24.1 103.5 Low 05:39:29 - 05:47:20 -1845
Sisters 05:43:25 -17.5 AT Up 23.9 103.2 Low 05:39:30 - 05:47:21 -1846
Bend 05:43:25 -17.8 AT Up 24.1 103.3 Low 05:39:29 - 05:47:20 -1869
Oregon Observatory 05:43:25 -17.9 AT Up 24.0 103.1 Low 05:39:30 - 05:47:21 -1888
La Pine/Gilchrist 05:43:25 -18.0 Dark Up 24.1 102.9 Low 05:39:30 - 05:47:21 -1911
North Lake 05:43:25 -18.6 Dark Up 24.6 103.2 Low 05:39:30 - 05:47:21 -1952
Paisley 05:43:25 -19.2 Dark Up 25.0 103.2 Low 05:39:29 - 05:47:20 -2008
Dunrhomin 05:42:56 -26.5 Dark Up 36.6 114.2 Up 05:39:00 - 05:46:51 -2047
Lakeview 05:43:24 -19.7 Dark Up 25.2 103.1 Low 05:39:29 - 05:47:20 -2061
Klamath Falls 05:43:27 -19.1 Dark Up 24.2 102.1 Low 05:39:32 - 05:47:23 -2069
Cedarville 05:43:25 -20.4 Dark Up 25.5 103.0 Low 05:39:29 - 05:47:20 -2130
Fall River/Burney 05:43:27 -20.2 Dark Up 24.7 101.9 Low 05:39:32 - 05:47:23 -2193
Susanville 05:43:27 -21.1 Dark Up 25.4 102.1 Low 05:39:31 - 05:47:22 -2254
Gimple 05:43:27 -21.2 Dark Up 25.3 101.8 Low 05:39:32 - 05:47:23 -2286
Greenville 05:43:27 -21.2 Dark Up 25.2 101.8 Low 05:39:31 - 05:47:22 -2287
Quincy 05:43:27 -21.4 Dark Up 25.3 101.7 Low 05:39:32 - 05:47:23 -2309
Portola 05:43:27 -21.7 Dark Up 25.6 102.0 Low 05:39:31 - 05:47:22 -2318
Reno 05:43:25 -22.2 Dark Up 26.2 102.3 Low 05:39:30 - 05:47:21 -2340
Carson City 05:43:26 -22.5 Dark Up 26.3 102.1 Low 05:39:31 - 05:47:22 -2379
Yerington 05:43:25 -22.9 Dark Up 26.8 102.5 Low 05:39:29 - 05:47:20 -2394
Gardnerville 05:43:26 -22.7 Dark Up 26.4 102.1 Low 05:39:30 - 05:47:21 -2405
Hawthorne 05:43:24 -23.5 Dark Up 27.3 102.6 Low 05:39:28 - 05:47:19 -2439
Tonopah 05:43:22 -24.5 Dark Up 28.5 103.4 Low 05:39:26 - 05:47:17 -2473
Lee Vining 05:43:25 -23.8 Dark Up 27.1 102.0 Low 05:39:30 - 05:47:21 -2505
Bishop 05:43:24 -24.6 Dark Up 27.7 102.2 Low 05:39:28 - 05:47:19 -2562
Beatty 05:43:21 -25.7 Dark Up 29.1 103.1 Low 05:39:26 - 05:47:17 -2593
Indian Springs 05:43:19 -26.4 Dark Up 30.0 103.7 Up 05:39:24 - 05:47:15 -2615
Henderson 05:43:17 -27.1 Dark Up 30.7 103.9 Up 05:39:21 - 05:47:12 -2663
Patrick 05:43:15 -28.1 Dark Up 31.7 104.3 Up 05:39:19 - 05:47:10 -2715
Kingman/Dolan Springs 05:43:16 -28.2 Dark Up 31.6 104.0 Up 05:39:20 - 05:47:11 -2742
Laughlin/Bullhead City 05:43:17 -28.1 Dark Up 31.2 103.6 Up 05:39:22 - 05:47:13 -2752
Mohave Valley 05:43:17 -28.3 Dark Up 31.3 103.5 Up 05:39:22 - 05:47:13 -2782
CPSLO 05:43:29 -25.3 Dark Up 26.4 99.7 Low 05:39:33 - 05:47:24 -2811
Lake Havasu City 05:43:17 -28.7 Dark Up 31.6 103.4 Up 05:39:21 - 05:47:12 -2822
Parker 05:43:16 -29.1 Dark Up 31.7 103.2 Up 05:39:21 - 05:47:12 -2859
George/Scottsdale 05:43:11 -30.4 Dark Up 33.7 104.6 Up 05:39:16 - 05:47:07 -2867
Blythe 05:43:17 -29.4 Dark Up 31.6 102.7 Up 05:39:22 - 05:47:13 -2921
Wildwood 05:43:25 -27.2 Dark Up 28.2 100.4 Low 05:39:30 - 05:47:21 -2922
Idyllwild 05:43:22 -28.4 Dark Up 29.8 101.4 Low 05:39:26 - 05:47:17 -2938
Calipatria 05:43:19 -29.4 Dark Up 30.9 101.8 Up 05:39:24 - 05:47:15 -2988
Yuma 05:43:17 -30.2 Dark Up 31.7 102.1 Up 05:39:22 - 05:47:13 -3022

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, (2021/05/24 05:39UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 32.13  79
60Bet Oph      17:43:28.3 +04:34:06  2.8  5.39  57
PPM 164995     18:00:52.8 +06:16:06  6.4  1.41  61
PPM 165077     18:03:21.1 +08:25:10  7.3  0.91  62
PPM 164994     18:00:50.2 +07:25:27 10.0  0.27  62
PPM 165000     18:01:07.7 +07:38:03 10.3  0.05  62
470309         18:01:11.8 +07:40:42 16.5        62
Positions are for J2000

Event circumstances last updated at 2021/01/21 21:10:05 UT

Marc W. Buie, Southwest Research Institute

RECON