RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1100:09231290 with event index number of 364146

Geocentric closest approach at 2020/10/19 03:00:41 UTC

J2000 position of star is 19:26:03.6 +20:12:25
Equinox of date position of star is 19:26:52.8 +20:14:44
Stellar brightness G=16.5, use SENSEUP=128
Star is 66 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 27.1 AU from the Sun and 27.1 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
The 1-sigma error in the time of the event is 48 seconds.
The 1-sigma cross-track error in the shadow position is 1313 km.
The sky-plane scale is 19661.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.5 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2020/10/19 03:01UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:38.6 +38:48:14  0.0 21.38  69
Tarazed        19:47:14.9 +10:39:55  2.7 10.76  65
5 Vul          19:27:07.7 +20:08:25  5.5  0.12  66
PPM 109008     19:27:25.0 +20:18:07  6.7  0.12  66
5 Vul          19:27:07.7 +20:08:25  5.5  0.12  66
523700         19:26:58.0 +20:14:59 16.5        66
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 5.6 km RECON observability=1.0 and success probability=16.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 02:59:54 -32.0 Dark Down 53.2 248.2 Up 02:55:24 - 03:04:23 -1200
DCO 03:00:12 -26.7 Dark Down 60.9 246.7 Up 02:55:42 - 03:04:41 -1827
Patrick 03:00:10 -26.1 Dark Down 61.3 245.4 Up 02:55:41 - 03:04:40 -1881
Kingman/Dolan Springs 03:00:11 -26.0 Dark Down 61.5 245.5 Up 02:55:42 - 03:04:41 -1899
Lake Havasu City 03:00:14 -25.8 Dark Down 62.0 246.4 Up 02:55:44 - 03:04:43 -1929
Parker 03:00:15 -25.9 Dark Down 62.1 247.1 Up 02:55:46 - 03:04:45 -1931
Laughlin/Bullhead City 03:00:11 -25.6 Dark Down 61.9 244.9 Up 02:55:41 - 03:04:40 -1941
Mohave Valley 03:00:12 -25.6 Dark Down 62.0 245.4 Up 02:55:43 - 03:04:42 -1944
Henderson 03:00:08 -25.1 Dark Down 61.9 243.0 Up 02:55:38 - 03:04:37 -1963
Blythe 03:00:18 -25.7 Dark Down 62.5 247.7 Up 02:55:48 - 03:04:47 -1963
Searchlight/Boulder City 03:00:09 -25.2 Dark Down 62.1 244.0 Up 02:55:39 - 03:04:38 -1965
Yuma 03:00:22 -25.8 Dark Down 62.9 249.3 Up 02:55:53 - 03:04:52 -1980
Indian Springs 03:00:04 -24.5 Dark Down 62.1 241.1 Up 02:55:35 - 03:04:34 -2011
Calipatria 03:00:19 -25.0 Dark Down 63.5 247.5 Up 02:55:49 - 03:04:48 -2048
Beatty 03:00:01 -23.6 Dark Down 62.7 239.1 Up 02:55:31 - 03:04:30 -2093
Tonopah 02:59:56 -23.1 Dark Down 62.4 236.5 Up 02:55:26 - 03:04:25 -2114
Idyllwild 03:00:15 -23.9 Dark Down 64.1 244.8 Up 02:55:46 - 03:04:45 -2137
PNWRO 02:59:20 -20.9 Dark Down 58.3 223.1 Up 02:54:51 - 03:03:50 -2150
Kelowna 02:59:03 -20.0 Dark Down 55.6 218.3 Up 02:54:34 - 03:03:33 -2152
Anarchist Mountain Observatory 02:59:07 -20.2 Dark Down 56.3 219.2 Up 02:54:37 - 03:03:36 -2157
Oroville 02:59:07 -20.1 Dark Down 56.4 219.1 Up 02:54:38 - 03:03:37 -2163
Pasco 02:59:19 -20.7 Dark Down 58.2 222.4 Up 02:54:49 - 03:03:48 -2164
Tonasket 02:59:08 -20.2 Dark Down 56.5 219.4 Up 02:54:39 - 03:03:38 -2165
Penticton 02:59:05 -20.0 Dark Down 55.9 218.4 Up 02:54:35 - 03:03:34 -2166
Oliver 02:59:06 -20.0 Dark Down 56.2 218.7 Up 02:54:37 - 03:03:36 -2169
Okanagan Falls 02:59:06 -20.0 Dark Down 56.1 218.5 Up 02:54:36 - 03:03:35 -2169
Summerland 02:59:03 -19.8 Dark Down 55.8 217.8 Up 02:54:34 - 03:03:33 -2177
Okanogan 02:59:10 -20.1 Dark Down 56.9 219.5 Up 02:54:40 - 03:03:39 -2177
George/Umatilla 02:59:20 -20.6 Dark Down 58.6 222.5 Up 02:54:51 - 03:03:50 -2183
Brewster 02:59:10 -20.0 Dark Down 57.1 219.4 Up 02:54:41 - 03:03:40 -2193
Lone Pine 03:00:01 -22.6 Dark Down 63.8 237.8 Up 02:55:32 - 03:04:31 -2202
Bishop 02:59:58 -22.3 Dark Down 63.6 236.0 Up 02:55:29 - 03:04:28 -2218
Hawthorne 02:59:53 -22.0 Dark Down 63.1 233.7 Up 02:55:23 - 03:04:22 -2219
Manson/Chelan 02:59:11 -19.8 Dark Down 57.5 219.1 Up 02:54:42 - 03:03:41 -2220
Entiat 02:59:12 -19.8 Dark Down 57.7 219.2 Up 02:54:43 - 03:03:42 -2227
Wenatchee 02:59:13 -19.7 Dark Down 57.9 219.3 Up 02:54:44 - 03:03:43 -2236
Toppenish/White Swan 02:59:17 -19.8 Dark Down 58.7 220.3 Up 02:54:48 - 03:03:47 -2252
Yerington 02:59:50 -21.5 Dark Down 63.1 232.1 Up 02:55:20 - 03:04:19 -2254
Ellensburg 02:59:14 -19.6 Dark Down 58.3 219.4 Up 02:54:45 - 03:03:44 -2256
Yakima 02:59:16 -19.7 Dark Down 58.6 219.8 Up 02:54:47 - 03:03:46 -2262
Lee Vining 02:59:54 -21.6 Dark Down 63.7 233.8 Up 02:55:25 - 03:04:24 -2267
Wildwood 03:00:12 -22.3 Dark Down 65.4 241.6 Up 02:55:42 - 03:04:41 -2288
Goldendale 02:59:19 -19.6 Dark Down 59.3 220.2 Up 02:54:50 - 03:03:49 -2288
Cedarville 02:59:38 -20.5 Dark Down 62.1 226.7 Up 02:55:09 - 03:04:08 -2296
Reno 02:59:47 -21.0 Dark Down 63.2 230.2 Up 02:55:17 - 03:04:16 -2297
Lakeview 02:59:35 -20.3 Dark Down 61.7 225.5 Up 02:55:06 - 03:04:05 -2300
Carson City 02:59:49 -21.0 Dark Down 63.4 230.8 Up 02:55:19 - 03:04:18 -2301
Gardnerville 02:59:50 -21.1 Dark Down 63.5 231.2 Up 02:55:20 - 03:04:19 -2301
Paisley 02:59:33 -20.1 Dark Down 61.5 224.5 Up 02:55:03 - 03:04:02 -2308
Maupin 02:59:22 -19.5 Dark Down 59.9 220.5 Up 02:54:52 - 03:03:51 -2315
The Dalles 02:59:20 -19.4 Dark Down 59.7 219.9 Up 02:54:51 - 03:03:50 -2317
Madras/Culver 02:59:24 -19.5 Dark Down 60.4 221.1 Up 02:54:55 - 03:03:54 -2325
North Lake 02:59:30 -19.8 Dark Down 61.3 223.2 Up 02:55:01 - 03:04:00 -2327
Redmond 02:59:25 -19.5 Dark Down 60.7 221.4 Up 02:54:56 - 03:03:55 -2333
Portola 02:59:45 -20.4 Dark Down 63.4 228.7 Up 02:55:16 - 03:04:15 -2344
Bend 02:59:26 -19.4 Dark Down 60.9 221.5 Up 02:54:57 - 03:03:56 -2346
Susanville 02:59:43 -20.2 Dark Down 63.1 227.5 Up 02:55:13 - 03:04:12 -2349
Oregon Observatory 02:59:27 -19.3 Dark Down 61.1 221.5 Up 02:54:58 - 03:03:57 -2358
Sisters 02:59:25 -19.2 Dark Down 60.8 220.7 Up 02:54:55 - 03:03:54 -2362
La Pine/Gilchrist 02:59:28 -19.3 Dark Down 61.3 221.6 Up 02:54:59 - 03:03:58 -2366
Gimple 02:59:44 -20.1 Dark Down 63.4 227.5 Up 02:55:14 - 03:04:13 -2370
Greenville 02:59:43 -20.0 Dark Down 63.5 227.4 Up 02:55:14 - 03:04:13 -2377
Quincy 02:59:44 -20.1 Dark Down 63.6 227.7 Up 02:55:15 - 03:04:14 -2380
Tulelake 02:59:35 -19.5 Dark Down 62.5 223.9 Up 02:55:06 - 03:04:05 -2389
Fall River/Burney 02:59:39 -19.6 Dark Down 63.1 225.3 Up 02:55:10 - 03:04:09 -2397
Klamath Falls 02:59:34 -19.2 Dark Down 62.4 223.0 Up 02:55:04 - 03:04:03 -2408
Chiloquin 02:59:32 -19.2 Dark Down 62.2 222.4 Up 02:55:03 - 03:04:02 -2408
CPSLO 03:00:05 -20.6 Dark Up 66.2 236.1 Up 02:55:36 - 03:04:35 -2438

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 523700, (2020/10/19 03:01UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 21.38  69
Tarazed        19:46:15.6 +10:36:48  2.7 10.76  65
5 Vul          19:26:13.2 +20:05:51  5.5  0.12  66
PPM 109008     19:26:30.6 +20:15:32  6.7  0.12  66
5 Vul          19:26:13.2 +20:05:51  5.5  0.12  66
523700         19:26:03.6 +20:12:25 16.5        66
Positions are for J2000

Event circumstances last updated at 2018/10/27 20:48:18 UT

Marc W. Buie, Southwest Research Institute

RECON