RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star UC4-477-068991 with event index number of 329924

Geocentric closest approach at 2020/04/30 09:17:50 UTC

J2000 position of star is 17:51:44.5 +05:14:33
Equinox of date position of star is 17:52:40.1 +05:14:21
Stellar brightness R=15.4, 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 54 seconds.
The 1-sigma cross-track error in the shadow position is 1095 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 09:18UT)
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     17:54:13.7 +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 15.4       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 15.9 km RECON observability=1.0 and success probability=10.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:21:37 -22.4 Dark Up 39.5 142.5 Up 09:16:37 - 09:26:37 3126
Summerland 09:21:38 -22.5 Dark Up 39.4 142.1 Up 09:16:38 - 09:26:38 3107
Penticton 09:21:37 -22.7 Dark Up 39.7 142.2 Up 09:16:37 - 09:26:37 3088
Niwot 09:20:40 -25.7 Dark Down 52.9 156.2 Up 09:15:40 - 09:25:40 3088
Okanagan Falls 09:21:37 -22.9 Dark Up 39.8 142.0 Up 09:16:37 - 09:26:37 3072
Oliver 09:21:37 -23.1 Dark Up 40.0 142.0 Up 09:16:37 - 09:26:37 3059
Anarchist Mountain Observatory 09:21:36 -23.2 Dark Up 40.2 142.1 Up 09:16:36 - 09:26:36 3053
Oroville 09:21:36 -23.3 Dark Up 40.2 142.0 Up 09:16:36 - 09:26:36 3044
Tonasket 09:21:35 -23.5 Dark Up 40.4 141.9 Up 09:16:35 - 09:26:35 3025
Okanogan 09:21:35 -23.8 Dark Up 40.6 141.5 Up 09:16:35 - 09:26:35 2989
Brewster 09:21:35 -24.1 Dark Up 40.7 141.1 Up 09:16:35 - 09:26:35 2957
Manson/Chelan 09:21:36 -24.4 Dark Up 40.7 140.6 Up 09:16:36 - 09:26:36 2923
Entiat 09:21:36 -24.6 Dark Up 40.9 140.4 Up 09:16:36 - 09:26:36 2901
Wenatchee 09:21:36 -24.9 Dark Up 41.0 140.1 Up 09:16:36 - 09:26:36 2875
Pasco 09:21:31 -25.7 Dark Up 42.4 140.9 Up 09:16:31 - 09:26:31 2833
Ellensburg 09:21:35 -25.3 Dark Up 41.2 139.6 Up 09:16:35 - 09:26:35 2830
PNWRO 09:21:30 -25.8 Dark Up 42.7 141.0 Up 09:16:30 - 09:26:30 2823
George/Umatilla 09:21:31 -26.0 Dark Up 42.6 140.4 Up 09:16:31 - 09:26:31 2795
Yakima 09:21:34 -25.7 Dark Up 41.5 139.3 Up 09:16:34 - 09:26:34 2794
Toppenish/White Swan 09:21:34 -25.9 Dark Up 41.8 139.4 Up 09:16:34 - 09:26:34 2784
Goldendale 09:21:34 -26.5 Dark Up 42.0 138.6 Up 09:16:34 - 09:26:34 2717
The Dalles 09:21:34 -26.8 Dark Up 42.0 138.0 Up 09:16:34 - 09:26:34 2680
Maupin 09:21:34 -27.2 Dark Up 42.4 137.9 Up 09:16:34 - 09:26:34 2649
Madras/Culver 09:21:33 -27.7 Dark Up 42.7 137.5 Up 09:16:33 - 09:26:33 2599
Redmond 09:21:32 -28.0 Dark Up 43.0 137.2 Up 09:16:32 - 09:26:32 2566
Sisters 09:21:32 -28.1 Dark Up 42.8 136.7 Up 09:16:32 - 09:26:32 2549
Bend 09:21:32 -28.3 Dark Up 43.1 136.9 Up 09:16:32 - 09:26:32 2541
Oregon Observatory 09:21:32 -28.5 Dark Up 43.1 136.6 Up 09:16:32 - 09:26:32 2519
La Pine/Gilchrist 09:21:32 -28.7 Dark Up 43.2 136.4 Up 09:16:32 - 09:26:32 2499
North Lake 09:21:29 -28.9 Dark Up 43.9 136.9 Up 09:16:29 - 09:26:29 2490
Paisley 09:21:28 -29.3 Dark Up 44.4 136.9 Up 09:16:28 - 09:26:28 2460
Lakeview 09:21:26 -29.7 Dark Up 44.9 136.8 Up 09:16:26 - 09:26:26 2425
Chiloquin 09:21:31 -29.8 Dark Up 43.9 135.3 Up 09:16:31 - 09:26:31 2384
Cedarville 09:21:24 -30.3 Dark Down 45.5 136.5 Up 09:16:24 - 09:26:24 2377
Klamath Falls 09:21:30 -30.1 Dark Up 44.1 135.1 Up 09:16:30 - 09:26:30 2358
Tulelake 09:21:29 -30.3 Dark Up 44.5 135.3 Up 09:16:29 - 09:26:29 2349
Fall River/Burney 09:21:27 -31.1 Dark Up 45.2 134.7 Up 09:16:27 - 09:26:27 2273
Susanville 09:21:23 -31.5 Dark Down 46.0 135.2 Up 09:16:23 - 09:26:23 2255
Tonopah 09:21:09 -32.5 Dark Down 49.5 137.6 Up 09:16:09 - 09:26:09 2234
Reno 09:21:20 -32.0 Dark Down 47.1 135.5 Up 09:16:20 - 09:26:20 2223
Gimple 09:21:23 -31.8 Dark Down 46.1 134.7 Up 09:16:23 - 09:26:23 2220
DCO 09:20:51 -33.4 Dark Down 53.8 140.6 Up 09:15:51 - 09:25:51 2217
Greenville 09:21:24 -31.8 Dark Down 46.0 134.6 Up 09:16:24 - 09:26:24 2216
Portola 09:21:22 -32.0 Dark Down 46.5 134.9 Up 09:16:22 - 09:26:22 2212
Yerington 09:21:17 -32.3 Dark Down 47.8 135.9 Up 09:16:17 - 09:26:17 2209
Patrick 09:20:54 -33.5 Dark Down 53.2 139.9 Up 09:15:54 - 09:25:54 2201
Quincy 09:21:24 -32.0 Dark Down 46.2 134.5 Up 09:16:24 - 09:26:24 2198
Hawthorne 09:21:14 -32.5 Dark Down 48.4 136.2 Up 09:16:14 - 09:26:14 2197
Indian Springs 09:21:02 -33.2 Dark Down 51.4 138.4 Up 09:16:02 - 09:26:02 2194
Carson City 09:21:18 -32.3 Dark Down 47.3 135.3 Up 09:16:18 - 09:26:18 2193
Henderson 09:20:58 -33.4 Dark Down 52.2 138.9 Up 09:15:58 - 09:25:58 2188
Gardnerville 09:21:18 -32.5 Dark Down 47.5 135.1 Up 09:16:18 - 09:26:18 2174
Kingman/Dolan Springs 09:20:53 -33.7 Dark Down 53.3 139.4 Up 09:15:53 - 09:25:53 2171
Beatty 09:21:05 -33.3 Dark Down 50.6 137.2 Up 09:16:05 - 09:26:05 2161
Searchlight/Boulder City 09:20:56 -33.9 Dark Down 52.6 138.4 Up 09:15:56 - 09:25:56 2144
Laughlin/Bullhead City 09:20:55 -34.0 Dark Down 53.1 138.7 Up 09:15:55 - 09:25:55 2139
Lee Vining 09:21:15 -33.2 Dark Down 48.6 135.1 Up 09:16:15 - 09:26:15 2122
Mohave Valley 09:20:55 -34.2 Dark Down 53.3 138.4 Up 09:15:55 - 09:25:55 2116
Bishop 09:21:11 -33.5 Dark Down 49.4 135.5 Up 09:16:11 - 09:26:11 2110
Lake Havasu City 09:20:53 -34.4 Dark Down 53.7 138.4 Up 09:15:53 - 09:25:53 2097
Parker 09:20:51 -34.7 Dark Down 54.0 138.1 Up 09:15:51 - 09:25:51 2069
Lone Pine 09:21:09 -34.1 Dark Down 50.1 135.3 Up 09:16:09 - 09:26:09 2062
Blythe 09:20:51 -35.3 Dark Down 54.2 137.2 Up 09:15:51 - 09:25:51 2007
Yuma 09:20:48 -36.1 Dark Down 54.8 136.2 Up 09:15:48 - 09:25:48 1926
Calipatria 09:20:51 -36.1 Dark Down 54.0 135.4 Up 09:15:51 - 09:25:51 1909
Idyllwild 09:20:57 -36.1 Dark Down 52.9 134.5 Up 09:15:57 - 09:25:57 1892
Wildwood 09:21:04 -36.5 Dark Down 51.5 132.4 Up 09:16:04 - 09:26:04 1814
CPSLO 09:21:13 -36.2 Dark Down 49.5 131.0 Up 09:16:13 - 09:26:13 1805

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 09:18UT)
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 15.4       133
Positions are for J2000

Event circumstances last updated at 2018/10/26 21:01:14 UT

Marc W. Buie, Southwest Research Institute

RECON