RECON: TNO occultation with 523727

Event between (523727) 14NW65 and star TYC20556-00038-1 with event index number of 306574

Geocentric closest approach at 2020/09/05 08:21:44 UTC

J2000 position of star is 21:46:58.9 +07:10:31
Equinox of date position of star is 21:47:55.0 +07:15:47
Stellar brightness V=7.8, use SENSEUP=2
Star is 52 degrees from the moon. Moon is 91% illuminated.
TNO apparent brightness V=20.1

[RECON map]
TNO is 22.5 AU from the Sun and 21.6 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 5.4 arcsec/hr.
The 1-sigma error in the time of the event is 46 seconds.
The 1-sigma cross-track error in the shadow position is 884 km.
The sky-plane scale is 15639.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 12.2 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523727, (2020/09/05 08:22UT)
Object            RA         Dec     mag  sep  mel
Markab         23:05:47.6 +15:19:01  2.5 20.68  34
4 Peg          21:39:34.1 +05:51:57  5.9  2.52  54
PPM 172201     21:45:50.2 +07:18:18  8.4  0.54  52
PPM 172244     21:48:06.9 +07:14:14  9.4  0.04  52
523727         21:48:00.6 +07:16:19  7.8        51
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 20.6 km RECON observability=1.0 and success probability=28.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 08:19:20 -33.4 Dark Up 43.1 212.4 Up 08:15:00 - 08:23:40 2396
Kelowna 08:19:19 -33.3 Dark Up 42.9 212.9 Up 08:14:59 - 08:23:39 2390
Penticton 08:19:20 -33.7 Dark Up 43.3 212.8 Up 08:15:00 - 08:23:40 2363
Okanagan Falls 08:19:20 -33.9 Dark Up 43.5 212.9 Up 08:15:00 - 08:23:40 2347
Oliver 08:19:20 -34.0 Dark Up 43.6 213.0 Up 08:15:00 - 08:23:40 2332
Anarchist Mountain Observatory 08:19:20 -34.2 Dark Up 43.7 213.4 Up 08:15:00 - 08:23:40 2312
Oroville 08:19:20 -34.2 Dark Up 43.8 213.3 Up 08:15:00 - 08:23:40 2307
Tonasket 08:19:20 -34.5 Dark Up 44.0 213.4 Up 08:15:00 - 08:23:40 2287
Okanogan 08:19:20 -34.8 Dark Up 44.3 213.4 Up 08:15:00 - 08:23:40 2261
Brewster 08:19:21 -35.1 Dark Up 44.6 213.3 Up 08:15:01 - 08:23:41 2243
Manson/Chelan 08:19:22 -35.3 Dark Up 44.9 212.9 Up 08:15:02 - 08:23:42 2235
Entiat 08:19:22 -35.6 Dark Up 45.1 213.0 Up 08:15:02 - 08:23:42 2217
Wenatchee 08:19:23 -35.8 Dark Up 45.4 213.0 Up 08:15:03 - 08:23:43 2197
Ellensburg 08:19:24 -36.3 Dark Up 45.8 212.9 Up 08:15:04 - 08:23:44 2167
Yakima 08:19:24 -36.7 Dark Up 46.1 213.1 Up 08:15:04 - 08:23:44 2131
Toppenish/White Swan 08:19:23 -36.9 Dark Up 46.2 213.5 Up 08:15:03 - 08:23:43 2106
Goldendale 08:19:24 -37.4 Dark Up 46.9 213.2 Up 08:15:04 - 08:23:44 2069
The Dalles 08:19:26 -37.7 Dark Up 47.2 212.9 Up 08:15:06 - 08:23:46 2060
Pasco 08:19:20 -36.9 Dark Up 45.9 215.2 Up 08:15:00 - 08:23:40 2058
George/Umatilla 08:19:21 -37.2 Dark Up 46.2 215.1 Up 08:15:01 - 08:23:41 2034
PNWRO 08:19:19 -37.1 Dark Up 46.0 215.6 Up 08:14:59 - 08:23:39 2029
Maupin 08:19:26 -38.1 Dark Up 47.5 213.3 Up 08:15:06 - 08:23:46 2019
Madras/Culver 08:19:27 -38.6 Dark Up 48.0 213.6 Up 08:15:07 - 08:23:47 1970
Sisters 08:19:28 -39.0 Dark Up 48.4 213.1 Up 08:15:08 - 08:23:48 1954
Redmond 08:19:27 -39.0 Dark Up 48.3 213.7 Up 08:15:07 - 08:23:47 1939
Bend 08:19:28 -39.2 Dark Up 48.5 213.7 Up 08:15:08 - 08:23:48 1924
Oregon Observatory 08:19:28 -39.4 Dark Up 48.7 213.6 Up 08:15:08 - 08:23:48 1912
La Pine/Gilchrist 08:19:28 -39.6 Dark Up 48.9 213.6 Up 08:15:08 - 08:23:48 1895
North Lake 08:19:26 -40.0 Dark Up 49.0 214.7 Up 08:15:06 - 08:23:46 1836
Chiloquin 08:19:30 -40.7 Dark Up 50.0 213.9 Up 08:15:10 - 08:23:50 1804
Paisley 08:19:26 -40.5 Dark Up 49.3 215.6 Up 08:15:06 - 08:23:46 1774
Klamath Falls 08:19:30 -41.1 Dark Up 50.2 214.2 Up 08:15:10 - 08:23:50 1770
Tulelake 08:19:29 -41.3 Dark Up 50.3 214.8 Up 08:15:09 - 08:23:49 1735
Lakeview 08:19:26 -41.0 Dark Up 49.7 216.2 Up 08:15:06 - 08:23:46 1721
Cedarville 08:19:26 -41.7 Dark Up 50.1 216.9 Up 08:15:06 - 08:23:46 1654
Fall River/Burney 08:19:30 -42.2 Dark Up 51.0 215.6 Up 08:15:10 - 08:23:50 1648
Susanville 08:19:28 -42.8 Dark Up 51.2 217.1 Up 08:15:08 - 08:23:48 1564
Greenville 08:19:29 -43.1 Dark Up 51.6 216.9 Up 08:15:09 - 08:23:49 1548
Gimple 08:19:29 -43.1 Dark Up 51.5 217.0 Up 08:15:09 - 08:23:49 1545
Quincy 08:19:29 -43.3 Dark Up 51.7 217.0 Up 08:15:09 - 08:23:49 1529
Portola 08:19:28 -43.4 Dark Up 51.6 217.8 Up 08:15:08 - 08:23:48 1501
Reno 08:19:26 -43.6 Dark Up 51.5 218.9 Up 08:15:06 - 08:23:46 1454
Carson City 08:19:26 -43.9 Dark Up 51.8 219.2 Up 08:15:06 - 08:23:46 1419
Gardnerville 08:19:26 -44.2 Dark Up 51.9 219.5 Up 08:15:06 - 08:23:46 1394
Yerington 08:19:24 -44.1 Dark Up 51.6 220.3 Up 08:15:04 - 08:23:44 1380
Hawthorne 08:19:23 -44.5 Dark Up 51.7 221.4 Up 08:15:03 - 08:23:43 1318
Lee Vining 08:19:25 -45.1 Dark Up 52.4 221.2 Up 08:15:05 - 08:23:45 1279
Tonopah 08:19:19 -44.7 Dark Up 51.3 223.6 Up 08:14:59 - 08:23:39 1227
Bishop 08:19:23 -45.6 Dark Up 52.4 222.7 Up 08:15:03 - 08:23:43 1198
Lone Pine 08:19:23 -46.3 Dark Up 52.8 223.8 Up 08:15:03 - 08:23:43 1112
Beatty 08:19:19 -45.8 Dark Up 51.9 225.3 Up 08:14:59 - 08:23:39 1099
Niwot 08:18:44 -39.8 Dark Up 42.9 235.9 Up 08:14:24 - 08:23:04 1084
CPSLO 08:19:32 -47.9 Dark Up 55.2 221.4 Up 08:15:12 - 08:23:52 1073
Indian Springs 08:19:16 -45.9 Dark Up 51.5 227.0 Up 08:14:56 - 08:23:36 1032
Henderson 08:19:14 -46.3 Dark Up 51.4 228.3 Up 08:14:54 - 08:23:34 957
Searchlight/Boulder City 08:19:14 -46.9 Dark Up 51.8 228.9 Up 08:14:54 - 08:23:34 897
Wildwood 08:19:27 -48.8 Dark Up 54.9 225.5 Up 08:15:07 - 08:23:47 883
Patrick 08:19:11 -46.7 Dark Up 51.2 230.3 Up 08:14:51 - 08:23:31 858
Laughlin/Bullhead City 08:19:13 -47.1 Dark Up 51.8 229.7 Up 08:14:53 - 08:23:33 857
Kingman/Dolan Springs 08:19:11 -46.9 Dark Up 51.4 230.3 Up 08:14:51 - 08:23:31 842
Mohave Valley 08:19:14 -47.3 Dark Up 51.9 229.9 Up 08:14:54 - 08:23:34 829
DCO 08:19:09 -46.8 Dark Up 50.9 231.4 Up 08:14:49 - 08:23:29 805
Idyllwild 08:19:21 -48.9 Dark Up 54.0 228.4 Up 08:15:01 - 08:23:41 783
Lake Havasu City 08:19:13 -47.7 Dark Up 52.0 230.6 Up 08:14:53 - 08:23:33 781
Parker 08:19:13 -48.0 Dark Up 52.2 231.0 Up 08:14:53 - 08:23:33 744
Blythe 08:19:14 -48.6 Dark Up 52.8 231.2 Up 08:14:54 - 08:23:34 701
Calipatria 08:19:18 -49.2 Dark Up 53.7 230.5 Up 08:14:58 - 08:23:38 682
Yuma 08:19:15 -49.5 Dark Up 53.4 232.1 Up 08:14:55 - 08:23:35 609

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 523727, (2020/09/05 08:22UT)
Object            RA         Dec     mag  sep  mel
Markab         23:04:45.7 +15:12:18  2.5 20.68  34
4 Peg          21:38:32.1 +05:46:19  5.9  2.52  54
PPM 172201     21:44:48.6 +07:12:33  8.4  0.54  52
PPM 172244     21:47:05.2 +07:08:27  9.4  0.04  52
523727         21:46:58.9 +07:10:31  7.8        52
Positions are for J2000

Event circumstances last updated at 2018/10/27 20:25:13 UT

Marc W. Buie, Southwest Research Institute

RECON