RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star GA0940:05526680 with event index number of 329924

Geocentric closest approach at 2020/04/30 09:14:54 UTC

J2000 position of star is 17:51:44.5 +05:14:33
Equinox of date position of star is 17:52:42.9 +05:14:20
Stellar brightness G=15.6, use SENSEUP=128
Star is 133 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 24.7 AU from the Sun and 24.1 AU from the Earth.
The TNO is moving 20.3 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 75 seconds.
The 1-sigma cross-track error in the shadow position is 1513 km.
The sky-plane scale is 17498.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 11.8 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470309, (2020/04/30 09:15UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:37.6 +38:48:13  0.0 35.07 114
60Bet Oph      17:44:28.7 +04:33:37  2.8  2.17 131
PPM 164771     17:54:13.6 +06:05:55  5.8  0.94 132
PPM 164696     17:52:04.9 +05:13:30  8.2  0.16 132
PPM 164703     17:52:30.2 +05:14:26 10.3  0.06 133
470309         17:52:44.5 +05:14:20 15.6       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 5.0 sigma about the mid-time.
The median site spacing is 16.0 km RECON observability=1.0 and success probability=11.2%
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 09:18:44 -22.2 Dark Up 38.9 142.0 Up 09:12:00 - 09:25:28 3437
Kelowna 09:18:44 -22.6 Dark Up 39.2 141.6 Up 09:12:00 - 09:25:28 3397
Summerland 09:18:44 -22.9 Dark Up 39.3 141.2 Up 09:12:00 - 09:25:28 3367
Penticton 09:18:42 -22.9 Dark Up 39.4 141.3 Up 09:11:58 - 09:25:26 3366
Niwot 09:17:46 -26.0 Dark Down 52.7 155.1 Up 09:11:02 - 09:24:30 3355
SwRI 09:17:47 -26.2 Dark Down 52.7 154.9 Up 09:11:03 - 09:24:31 3342
Oliver 09:18:41 -23.3 Dark Up 39.7 141.1 Up 09:11:57 - 09:25:25 3337
Anarchist Mountain Observatory 09:18:42 -23.4 Dark Up 39.9 141.2 Up 09:11:58 - 09:25:26 3331
Tonasket 09:18:42 -23.7 Dark Up 40.1 141.0 Up 09:11:58 - 09:25:26 3302
Okanogan 09:18:42 -24.0 Dark Up 40.3 140.6 Up 09:11:58 - 09:25:26 3267
Brewster 09:18:42 -24.3 Dark Up 40.4 140.3 Up 09:11:58 - 09:25:26 3235
Manson/Chelan 09:18:42 -24.6 Dark Up 40.4 139.7 Up 09:11:58 - 09:25:26 3200
Entiat 09:18:42 -24.8 Dark Up 40.5 139.5 Up 09:11:58 - 09:25:26 3178
Wenatchee 09:18:42 -25.1 Dark Up 40.7 139.2 Up 09:11:58 - 09:25:26 3152
Victoria 09:18:51 -24.7 Dark Up 38.5 136.3 Up 09:12:07 - 09:25:35 3112
Pasco 09:18:37 -25.9 Dark Up 42.1 140.0 Up 09:11:53 - 09:25:21 3109
Ellensburg 09:18:42 -25.5 Dark Up 40.9 138.7 Up 09:11:58 - 09:25:26 3107
PNWRO 09:18:37 -26.0 Dark Up 42.4 140.1 Up 09:11:53 - 09:25:21 3099
Yakima 09:18:41 -25.9 Dark Up 41.2 138.5 Up 09:11:57 - 09:25:25 3071
Toppenish/White Swan 09:18:40 -26.1 Dark Up 41.4 138.6 Up 09:11:56 - 09:25:24 3060
Goldendale 09:18:40 -26.7 Dark Up 41.7 137.7 Up 09:11:56 - 09:25:24 2993
The Dalles 09:18:41 -27.0 Dark Up 41.7 137.2 Up 09:11:57 - 09:25:25 2956
Maupin 09:18:40 -27.4 Dark Up 42.0 137.0 Up 09:11:56 - 09:25:24 2925
Redmond 09:18:39 -28.2 Dark Up 42.6 136.4 Up 09:11:55 - 09:25:23 2841
Sisters 09:18:39 -28.3 Dark Up 42.4 135.9 Up 09:11:55 - 09:25:23 2824
Bend 09:18:39 -28.5 Dark Up 42.7 136.1 Up 09:11:55 - 09:25:23 2816
Oregon Observatory 09:18:38 -28.7 Dark Up 42.8 135.8 Up 09:11:54 - 09:25:22 2795
La Pine/Gilchrist 09:18:39 -28.9 Dark Up 42.9 135.6 Up 09:11:55 - 09:25:23 2774
North Lake 09:18:37 -29.1 Dark Up 43.5 136.0 Up 09:11:53 - 09:25:21 2765
Paisley 09:18:34 -29.5 Dark Up 44.1 136.0 Up 09:11:50 - 09:25:18 2734
Lakeview 09:18:33 -30.0 Dark Up 44.5 135.9 Up 09:11:49 - 09:25:17 2699
Cedarville 09:18:31 -30.5 Dark Up 45.1 135.7 Up 09:11:47 - 09:25:15 2651
Klamath Falls 09:18:37 -30.3 Dark Up 43.8 134.3 Up 09:11:53 - 09:25:21 2632
Fall River/Burney 09:18:33 -31.3 Dark Up 44.8 133.9 Up 09:11:49 - 09:25:17 2547
Susanville 09:18:31 -31.7 Dark Down 45.6 134.3 Up 09:11:47 - 09:25:15 2529
Tonopah 09:18:16 -32.7 Dark Down 49.1 136.7 Up 09:11:32 - 09:25:00 2504
Reno 09:18:26 -32.2 Dark Down 46.7 134.6 Up 09:11:42 - 09:25:10 2495
Gimple 09:18:30 -32.0 Dark Down 45.7 133.8 Up 09:11:46 - 09:25:14 2493
Greenville 09:18:30 -32.0 Dark Up 45.6 133.7 Up 09:11:46 - 09:25:14 2489
Portola 09:18:28 -32.2 Dark Down 46.1 134.1 Up 09:11:44 - 09:25:12 2485
DCO 09:17:57 -33.7 Dark Down 53.5 139.6 Up 09:11:13 - 09:24:41 2484
Yerington 09:18:24 -32.5 Dark Down 47.4 135.0 Up 09:11:40 - 09:25:08 2481
Quincy 09:18:30 -32.2 Dark Down 45.8 133.6 Up 09:11:46 - 09:25:14 2471
Hawthorne 09:18:21 -32.8 Dark Down 48.0 135.3 Up 09:11:37 - 09:25:05 2469
Patrick 09:18:00 -33.8 Dark Down 52.9 138.8 Up 09:11:16 - 09:24:44 2468
Carson City 09:18:25 -32.6 Dark Down 46.9 134.4 Up 09:11:41 - 09:25:09 2465
Indian Springs 09:18:09 -33.5 Dark Down 51.0 137.4 Up 09:11:25 - 09:24:53 2463
Henderson 09:18:04 -33.7 Dark Down 51.8 137.9 Up 09:11:20 - 09:24:48 2457
George/Scottsdale 09:17:50 -34.3 Dark Down 55.2 140.1 Up 09:11:06 - 09:24:34 2446
Gardnerville 09:18:25 -32.8 Dark Down 47.1 134.3 Up 09:11:41 - 09:25:09 2446
Kingman/Dolan Springs 09:18:00 -34.0 Dark Down 52.9 138.4 Up 09:11:16 - 09:24:44 2438
Beatty 09:18:12 -33.6 Dark Down 50.2 136.3 Up 09:11:28 - 09:24:56 2430
Searchlight/Boulder City 09:18:04 -34.2 Dark Down 52.3 137.5 Up 09:11:20 - 09:24:48 2412
Laughlin/Bullhead City 09:18:01 -34.3 Dark Down 52.7 137.7 Up 09:11:17 - 09:24:45 2406
Lee Vining 09:18:21 -33.5 Dark Down 48.2 134.2 Up 09:11:37 - 09:25:05 2393
Mohave Valley 09:18:00 -34.5 Dark Down 52.9 137.4 Up 09:11:16 - 09:24:44 2383
Bishop 09:18:18 -33.8 Dark Down 49.0 134.6 Up 09:11:34 - 09:25:02 2380
Lake Havasu City 09:17:59 -34.8 Dark Down 53.3 137.4 Up 09:11:15 - 09:24:43 2364
Parker 09:17:59 -35.0 Dark Down 53.6 137.1 Up 09:11:15 - 09:24:43 2336
Blythe 09:17:57 -35.6 Dark Down 53.8 136.2 Up 09:11:13 - 09:24:41 2274
Yuma 09:17:55 -36.4 Dark Down 54.4 135.2 Up 09:11:11 - 09:24:39 2193
Calipatria 09:17:59 -36.4 Dark Down 53.6 134.5 Up 09:11:15 - 09:24:43 2176
Idyllwild 09:18:04 -36.4 Dark Down 52.5 133.5 Up 09:11:20 - 09:24:48 2160
Wildwood 09:18:10 -36.8 Dark Down 51.1 131.5 Up 09:11:26 - 09:24:54 2083
CPSLO 09:18:19 -36.4 Dark Down 49.0 130.1 Up 09:11:35 - 09:25:03 2076

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, (2020/04/30 09:15UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 35.07 114
60Bet Oph      17:43:28.3 +04:34:05  2.8  2.17 131
PPM 164771     17:53:14.0 +06:06:06  5.8  0.94 132
PPM 164696     17:51:04.9 +05:13:45  8.2  0.16 132
PPM 164703     17:51:30.1 +05:14:41 10.3  0.06 133
470309         17:51:44.5 +05:14:33 15.6       133
Positions are for J2000

Event circumstances last updated at 2019/10/15 22:18:15 UT

Marc W. Buie, Southwest Research Institute

RECON