RECON: TNO occultation with 523766

Event between (523766) 14WF510 and star UC4-460-006515 with event index number of 348049

Geocentric closest approach at 2019/08/31 10:43:10 UTC

J2000 position of star is 04:27:04.7 +01:58:34
Equinox of date position of star is 04:28:03.4 +02:01:02
Stellar brightness R=16.1, use SENSEUP=128
Star is 107 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 31.5 AU from the Sun and 31.4 AU from the Earth.
The TNO is moving 12.2 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 107 seconds.
The 1-sigma cross-track error in the shadow position is 1548 km.
The sky-plane scale is 22787.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 19.7 sec chord
Diameter=97.9 km assuming a 30% albedo -- 8.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523766, (2019/08/31 10:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.1 +16:32:50  0.8 14.69 103
67Bet Eri      05:08:49.0 -05:03:45  2.8 12.39  98
PPM 147584     04:29:33.2 +01:25:23  5.5  0.70 107
PPM 147577     04:29:04.9 +01:54:04  7.3  0.27 107
PPM 147560     04:28:04.7 +02:10:16  9.7  0.15 107
523766         04:28:06.0 +02:01:09 16.1       107
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 14.2 km RECON observability=1.0 and success probability=17.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:35:29 -22.1 Dark Down 27.2 123.4 Low 10:26:06 - 10:44:52 -1095
Summerland 10:35:29 -22.3 Dark Down 27.1 123.0 Low 10:26:06 - 10:44:52 -1114
Penticton 10:35:29 -22.5 Dark Down 27.3 123.1 Low 10:26:06 - 10:44:52 -1135
Okanagan Falls 10:35:30 -22.6 Dark Down 27.4 123.0 Low 10:26:07 - 10:44:53 -1153
Niwot 10:36:41 -20.4 Dark Down 41.3 132.9 Up 10:27:18 - 10:46:04 -1167
Oliver 10:35:30 -22.7 Dark Down 27.5 122.9 Low 10:26:07 - 10:44:53 -1167
Anarchist Mountain Observatory 10:35:31 -22.8 Dark Down 27.7 123.1 Low 10:26:08 - 10:44:54 -1174
Oroville 10:35:31 -22.9 Dark Down 27.7 123.0 Low 10:26:08 - 10:44:54 -1184
Tonasket 10:35:32 -23.0 Dark Down 27.9 122.9 Low 10:26:09 - 10:44:55 -1205
Okanogan 10:35:33 -23.4 Dark Down 28.0 122.6 Low 10:26:10 - 10:44:56 -1241
Brewster 10:35:33 -23.6 Dark Down 28.0 122.3 Low 10:26:10 - 10:44:56 -1275
Manson/Chelan 10:35:33 -24.0 Dark Down 27.9 121.8 Low 10:26:10 - 10:44:56 -1309
Entiat 10:35:34 -24.2 Dark Down 28.0 121.7 Low 10:26:11 - 10:44:57 -1332
Wenatchee 10:35:34 -24.4 Dark Down 28.0 121.5 Low 10:26:11 - 10:44:57 -1360
Ellensburg 10:35:35 -24.8 Dark Down 28.1 121.1 Low 10:26:12 - 10:44:58 -1406
Pasco 10:35:41 -24.7 Dark Down 29.4 122.1 Low 10:26:18 - 10:45:04 -1411
PNWRO 10:35:42 -24.7 Dark Down 29.6 122.2 Low 10:26:19 - 10:45:05 -1422
Yakima 10:35:37 -25.1 Dark Down 28.3 120.9 Low 10:26:14 - 10:45:00 -1444
George/Umatilla 10:35:42 -25.0 Dark Down 29.4 121.7 Low 10:26:19 - 10:45:05 -1451
Toppenish/White Swan 10:35:38 -25.2 Dark Down 28.6 120.9 Low 10:26:15 - 10:45:01 -1456
Goldendale 10:35:39 -25.8 Dark Down 28.6 120.3 Low 10:26:16 - 10:45:02 -1525
The Dalles 10:35:39 -26.1 Dark Down 28.5 119.8 Low 10:26:16 - 10:45:02 -1561
Maupin 10:35:40 -26.4 Dark Down 28.7 119.7 Low 10:26:17 - 10:45:03 -1595
Madras/Culver 10:35:42 -26.8 Dark Down 29.0 119.5 Low 10:26:19 - 10:45:05 -1646
Redmond 10:35:43 -27.1 Dark Down 29.1 119.2 Low 10:26:20 - 10:45:06 -1680
Sisters 10:35:43 -27.3 Dark Down 28.9 118.9 Low 10:26:20 - 10:45:06 -1696
Bend 10:35:44 -27.3 Dark Down 29.2 119.0 Low 10:26:21 - 10:45:07 -1706
Oregon Observatory 10:35:44 -27.5 Dark Down 29.2 118.8 Low 10:26:21 - 10:45:07 -1728
La Pine/Gilchrist 10:35:45 -27.7 Dark Down 29.2 118.7 Low 10:26:22 - 10:45:08 -1749
North Lake 10:35:47 -27.7 Dark Down 29.8 119.0 Low 10:26:24 - 10:45:10 -1761
Paisley 10:35:51 -27.9 Dark Down 30.3 119.0 Up 10:26:28 - 10:45:14 -1793
Lakeview 10:35:54 -28.2 Dark Down 30.7 119.0 Up 10:26:31 - 10:45:17 -1829
Chiloquin 10:35:48 -28.7 Dark Down 29.5 117.8 Low 10:26:25 - 10:45:11 -1865
Cedarville 10:35:56 -28.5 Dark Down 31.2 118.8 Up 10:26:33 - 10:45:19 -1879
Klamath Falls 10:35:50 -28.9 Dark Down 29.7 117.7 Low 10:26:27 - 10:45:13 -1892
Tulelake 10:35:52 -28.9 Dark Down 30.1 117.8 Up 10:26:29 - 10:45:15 -1903
Fall River/Burney 10:35:56 -29.5 Dark Down 30.6 117.5 Up 10:26:33 - 10:45:19 -1980
Susanville 10:36:01 -29.6 Dark Down 31.4 117.8 Up 10:26:38 - 10:45:24 -2001
Tonopah 10:36:18 -29.2 Dark Down 34.9 119.5 Up 10:26:55 - 10:45:41 -2030
Gimple 10:36:01 -29.9 Dark Down 31.4 117.5 Up 10:26:38 - 10:45:24 -2035
Reno 10:36:07 -29.7 Dark Down 32.4 118.1 Up 10:26:44 - 10:45:30 -2036
Greenville 10:36:01 -29.9 Dark Down 31.3 117.4 Up 10:26:38 - 10:45:24 -2039
DCO 10:36:44 -28.4 Dark Down 39.3 121.4 Up 10:27:21 - 10:46:07 -2044
Portola 10:36:03 -29.9 Dark Down 31.8 117.6 Up 10:26:40 - 10:45:26 -2045
Yerington 10:36:09 -29.7 Dark Down 33.1 118.3 Up 10:26:46 - 10:45:32 -2052
Quincy 10:36:02 -30.1 Dark Down 31.4 117.3 Up 10:26:39 - 10:45:25 -2057
Patrick 10:36:40 -28.7 Dark Down 38.6 120.9 Up 10:27:17 - 10:46:03 -2061
Hawthorne 10:36:13 -29.7 Dark Down 33.7 118.5 Up 10:26:50 - 10:45:36 -2064
Carson City 10:36:08 -29.9 Dark Down 32.5 117.9 Up 10:26:45 - 10:45:31 -2067
Indian Springs 10:36:30 -29.2 Dark Down 36.7 120.0 Up 10:27:07 - 10:45:53 -2070
Henderson 10:36:35 -29.1 Dark Down 37.5 120.3 Up 10:27:12 - 10:45:58 -2075
Gardnerville 10:36:09 -30.1 Dark Down 32.7 117.8 Up 10:26:46 - 10:45:32 -2086
Kingman/Dolan Springs 10:36:41 -29.0 Dark Down 38.6 120.6 Up 10:27:18 - 10:46:04 -2091
Beatty 10:36:26 -29.7 Dark Down 35.8 119.2 Up 10:27:03 - 10:45:49 -2103
Searchlight/Boulder City 10:36:37 -29.4 Dark Down 37.8 120.0 Up 10:27:14 - 10:46:00 -2119
Laughlin/Bullhead City 10:36:41 -29.3 Dark Down 38.2 120.1 Up 10:27:18 - 10:46:04 -2123
Lee Vining 10:36:15 -30.4 Dark Down 33.6 117.8 Up 10:26:52 - 10:45:38 -2138
Mohave Valley 10:36:42 -29.5 Dark Down 38.4 119.9 Up 10:27:19 - 10:46:05 -2144
Bishop 10:36:20 -30.3 Dark Down 34.4 118.1 Up 10:26:57 - 10:45:43 -2152
Lake Havasu City 10:36:44 -29.5 Dark Down 38.8 119.9 Up 10:27:21 - 10:46:07 -2162
Parker 10:36:46 -29.7 Dark Down 39.0 119.7 Up 10:27:23 - 10:46:09 -2189
Lone Pine 10:36:25 -30.6 Dark Down 35.0 117.9 Up 10:27:02 - 10:45:48 -2199
Blythe 10:36:48 -30.2 Dark Down 39.0 119.0 Up 10:27:25 - 10:46:11 -2249
Yuma 10:36:55 -30.8 Dark Down 39.4 118.4 Up 10:27:32 - 10:46:18 -2325
Calipatria 10:36:49 -31.2 Dark Down 38.6 117.9 Up 10:27:26 - 10:46:12 -2344
Idyllwild 10:36:41 -31.6 Dark Down 37.4 117.2 Up 10:27:18 - 10:46:04 -2363
Wildwood 10:36:34 -32.6 Dark Down 35.8 115.9 Up 10:27:11 - 10:45:57 -2438
CPSLO 10:36:24 -33.1 Dark Down 33.7 114.9 Up 10:27:01 - 10:45:47 -2445

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 523766, (2019/08/31 10:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 14.69 103
67Bet Eri      05:07:50.9 -05:05:13  2.8 12.39  98
PPM 147584     04:28:32.1 +01:22:50  5.5  0.70 107
PPM 147577     04:28:03.7 +01:51:31  7.3  0.27 107
PPM 147560     04:27:03.3 +02:07:42  9.7  0.15 107
523766         04:27:04.7 +01:58:34 16.1       107
Positions are for J2000

Event circumstances last updated at 2018/10/25 20:29:59 UT

Marc W. Buie, Southwest Research Institute

RECON