RECON: TNO occultation with 523701

Event between (523701) 14HT199 and star UC4-369-072902 with event index number of 324124

Geocentric closest approach at 2020/04/16 10:03:51 UTC

J2000 position of star is 15:54:21.7 -16:22:45
Equinox of date position of star is 15:55:25.9 -16:26:01
Stellar brightness R=15.4, use SENSEUP=128
Star is 74 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 29.9 AU from the Sun and 29.0 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 1227 km.
The sky-plane scale is 21060.3 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 11.2 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523701, (2020/04/16 10:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.3 -26:28:31  0.9 12.94  64
8Bet1Sco       16:06:37.2 -19:51:34  2.6  4.32  71
46The Lib      15:54:59.0 -16:47:15  4.3  0.37  74
PPM 230994     15:58:14.3 -16:05:32  6.5  0.74  73
PPM 230940     15:56:08.6 -16:25:11  8.9  0.15  74
523701         15:55:30.9 -16:26:16 15.4        74
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 11.9 km RECON observability=1.0 and success probability=14.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:04:58 -23.6 Dark Down 23.7 178.2 Low 09:57:40 - 10:12:15 2001
Summerland 10:04:59 -23.8 Dark Down 23.7 177.8 Low 09:57:41 - 10:12:16 1994
Penticton 10:04:58 -24.0 Dark Down 24.1 178.0 Low 09:57:41 - 10:12:16 1982
Okanagan Falls 10:04:58 -24.1 Dark Down 24.3 178.0 Low 09:57:41 - 10:12:16 1973
Oliver 10:04:58 -24.2 Dark Down 24.4 178.0 Low 09:57:41 - 10:12:16 1966
Anarchist Mountain Observatory 10:04:57 -24.3 Dark Down 24.6 178.2 Low 09:57:39 - 10:12:14 1961
Oroville 10:04:58 -24.4 Dark Down 24.7 178.1 Low 09:57:40 - 10:12:15 1957
Tonasket 10:04:57 -24.6 Dark Down 24.9 178.1 Low 09:57:40 - 10:12:15 1946
Okanogan 10:04:58 -24.9 Dark Down 25.2 178.0 Low 09:57:41 - 10:12:16 1928
Brewster 10:04:59 -25.2 Dark Down 25.5 177.7 Low 09:57:41 - 10:12:16 1912
Manson/Chelan 10:05:00 -25.5 Dark Down 25.7 177.4 Low 09:57:42 - 10:12:17 1897
Entiat 10:05:00 -25.7 Dark Down 25.9 177.3 Low 09:57:43 - 10:12:18 1885
Wenatchee 10:05:00 -26.0 Dark Down 26.2 177.2 Low 09:57:43 - 10:12:18 1871
Ellensburg 10:05:01 -26.4 Dark Down 26.6 176.9 Low 09:57:43 - 10:12:18 1847
Pasco 10:04:55 -26.5 Dark Down 27.4 178.4 Low 09:57:38 - 10:12:13 1831
Yakima 10:05:01 -26.8 Dark Down 27.0 176.9 Low 09:57:43 - 10:12:18 1827
PNWRO 10:04:55 -26.6 Dark Down 27.6 178.7 Low 09:57:37 - 10:12:12 1822
Toppenish/White Swan 10:05:00 -26.9 Dark Down 27.2 177.1 Low 09:57:43 - 10:12:18 1818
George/Umatilla 10:04:56 -26.8 Dark Down 27.7 178.2 Low 09:57:39 - 10:12:14 1811
Goldendale 10:05:01 -27.5 Dark Down 27.7 176.6 Low 09:57:43 - 10:12:18 1784
The Dalles 10:05:01 -27.8 Dark Down 27.9 176.2 Low 09:57:43 - 10:12:18 1767
Maupin 10:05:01 -28.1 Dark Down 28.4 176.3 Low 09:57:43 - 10:12:18 1746
Madras/Culver 10:05:01 -28.6 Dark Down 28.9 176.2 Low 09:57:43 - 10:12:18 1716
Redmond 10:05:01 -28.9 Dark Down 29.3 176.2 Low 09:57:43 - 10:12:18 1696
Sisters 10:05:01 -29.1 Dark Down 29.2 175.7 Low 09:57:43 - 10:12:18 1692
Bend 10:05:01 -29.1 Dark Down 29.5 176.0 Low 09:57:43 - 10:12:18 1683
Niwot 10:03:51 -24.1 Dark Up 32.4 193.9 Up 09:56:34 - 10:11:09 1678
Oregon Observatory 10:05:01 -29.3 Dark Down 29.6 175.8 Low 09:57:43 - 10:12:18 1671
La Pine/Gilchrist 10:05:01 -29.5 Dark Down 29.8 175.8 Low 09:57:43 - 10:12:18 1659
North Lake 10:05:01 -29.6 Dark Down 30.3 176.4 Up 09:57:43 - 10:12:18 1643
Paisley 10:05:00 -29.9 Dark Down 30.9 176.8 Up 09:57:42 - 10:12:17 1618
Lakeview 10:04:59 -30.3 Dark Down 31.4 177.0 Up 09:57:41 - 10:12:16 1592
Chiloquin 10:05:01 -30.6 Dark Down 30.9 175.3 Up 09:57:43 - 10:12:18 1592
Klamath Falls 10:05:01 -30.9 Dark Down 31.3 175.4 Up 09:57:43 - 10:12:18 1573
Tulelake 10:05:01 -30.9 Dark Down 31.6 175.7 Up 09:57:43 - 10:12:18 1561
Cedarville 10:04:58 -30.7 Dark Down 32.0 177.2 Up 09:57:41 - 10:12:16 1557
Fall River/Burney 10:05:01 -31.7 Dark Down 32.5 175.8 Up 09:57:43 - 10:12:18 1508
Susanville 10:05:00 -31.8 Dark Down 33.1 176.6 Up 09:57:42 - 10:12:17 1483
Gimple 10:05:00 -32.2 Dark Down 33.4 176.3 Up 09:57:43 - 10:12:18 1462
Greenville 10:05:01 -32.2 Dark Down 33.4 176.2 Up 09:57:43 - 10:12:18 1461
Portola 10:04:59 -32.2 Dark Down 33.7 176.8 Up 09:57:41 - 10:12:16 1449
Quincy 10:05:00 -32.4 Dark Down 33.6 176.2 Up 09:57:43 - 10:12:18 1449
Reno 10:04:55 -32.2 Dark Down 34.0 177.5 Up 09:57:38 - 10:12:13 1444
Carson City 10:04:55 -32.4 Dark Down 34.4 177.5 Up 09:57:38 - 10:12:13 1422
Yerington 10:04:52 -32.3 Dark Down 34.6 178.2 Up 09:57:35 - 10:12:10 1420
Gardnerville 10:04:55 -32.6 Dark Down 34.6 177.6 Up 09:57:38 - 10:12:13 1407
Hawthorne 10:04:50 -32.4 Dark Down 35.1 178.8 Up 09:57:32 - 10:12:07 1400
Tonopah 10:04:43 -32.1 Dark Down 35.6 180.5 Up 09:57:26 - 10:12:01 1394
Lee Vining 10:04:52 -33.1 Dark Down 35.6 178.2 Up 09:57:34 - 10:12:09 1356
Bishop 10:04:48 -33.2 Dark Down 36.3 179.1 Up 09:57:31 - 10:12:06 1330
Beatty 10:04:40 -32.7 Dark Down 36.7 181.0 Up 09:57:23 - 10:11:58 1327
Indian Springs 10:04:35 -32.4 Dark Down 37.0 182.3 Up 09:57:17 - 10:11:52 1323
Henderson 10:04:31 -32.4 Dark Down 37.5 183.1 Up 09:57:14 - 10:11:49 1298
Lone Pine 10:04:46 -33.6 Dark Down 37.0 179.5 Up 09:57:28 - 10:12:03 1286
Patrick 10:04:26 -32.2 Dark Up 38.1 184.5 Up 09:57:08 - 10:11:43 1274
DCO 10:04:22 -32.0 Dark Up 38.3 185.3 Up 09:57:04 - 10:11:39 1264
Searchlight/Boulder City 10:04:30 -32.8 Dark Down 38.1 183.2 Up 09:57:13 - 10:11:48 1261
Kingman/Dolan Springs 10:04:26 -32.5 Dark Up 38.3 184.3 Up 09:57:09 - 10:11:44 1256
Laughlin/Bullhead City 10:04:29 -32.8 Dark Down 38.4 183.6 Up 09:57:12 - 10:11:47 1247
Mohave Valley 10:04:28 -33.0 Dark Down 38.6 183.7 Up 09:57:11 - 10:11:46 1228
Lake Havasu City 10:04:27 -33.1 Dark Up 39.0 184.0 Up 09:57:09 - 10:11:44 1205
Parker 10:04:26 -33.4 Dark Up 39.4 184.0 Up 09:57:09 - 10:11:44 1181
CPSLO 10:04:57 -35.9 Dark Down 38.2 176.3 Up 09:57:40 - 10:12:15 1153
Blythe 10:04:27 -33.9 Dark Up 39.9 183.7 Up 09:57:10 - 10:11:45 1141
Idyllwild 10:04:37 -35.0 Dark Down 39.9 181.1 Up 09:57:20 - 10:11:55 1114
Wildwood 10:04:47 -35.8 Dark Down 39.5 178.8 Up 09:57:30 - 10:12:05 1107
Calipatria 10:04:32 -34.8 Dark Down 40.5 182.6 Up 09:57:14 - 10:11:49 1091
Yuma 10:04:27 -34.6 Dark Up 40.8 183.7 Up 09:57:09 - 10:11:44 1075

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 523701, (2020/04/16 10:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.94  64
8Bet1Sco       16:05:26.2 -19:48:20  2.6  4.32  71
46The Lib      15:53:49.7 -16:43:43  4.3  0.37  74
PPM 230994     15:57:05.2 -16:02:05  6.5  0.74  73
PPM 230940     15:54:59.4 -16:21:41  8.9  0.15  74
523701         15:54:21.7 -16:22:45 15.4        74
Positions are for J2000

Event circumstances last updated at 2018/10/26 20:57:00 UT

Marc W. Buie, Southwest Research Institute

RECON