RECON: TNO occultation with 04MU8

Event between 04MU8 and star GA0700:34268426 with event index number of 276121

Geocentric closest approach at 2020/08/09 07:37:37 UTC

J2000 position of star is 20:37:08.9 -19:39:39
Equinox of date position of star is 20:38:13.7 -19:35:39
Stellar brightness G=13.5, use SENSEUP=32
Star is 75 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 47.5 AU from the Sun and 46.5 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 343 seconds.
The 1-sigma cross-track error in the shadow position is 2776 km.
The sky-plane scale is 33752.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=361.4 km assuming a 5% albedo -- 14.7 sec chord
Diameter=147.5 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 04MU8, (2020/08/09 07:38UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:47.1 -29:30:45  1.2 33.30  49
38Zet Sgr      19:03:55.3 -29:50:56  2.7 23.70  97
15Ups Cap      20:41:13.2 -18:03:53  5.2  1.67  74
PPM 237612     20:35:38.5 -19:19:35  8.2  0.69  75
PPM 237688     20:38:33.5 -19:46:34  8.9  0.20  75
04MU8          20:38:19.9 -19:35:16 13.5        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 2.6 sigma about the mid-time.
The median site spacing is 10.8 km RECON observability=1.0 and success probability=9.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 07:36:26 -24.2 Dark Up 20.4 183.4 Low 07:21:26 - 07:51:26 2101
Kelowna 07:36:25 -24.2 Dark Up 20.4 183.7 Low 07:21:25 - 07:51:25 2095
Penticton 07:36:26 -24.5 Dark Up 20.7 183.6 Low 07:21:26 - 07:51:26 2084
Okanagan Falls 07:36:26 -24.7 Dark Up 20.9 183.5 Low 07:21:26 - 07:51:26 2077
Oliver 07:36:26 -24.9 Dark Up 21.1 183.6 Low 07:21:26 - 07:51:26 2070
Anarchist Mountain Observatory 07:36:26 -25.0 Dark Up 21.3 183.8 Low 07:21:26 - 07:51:26 2059
Oroville 07:36:26 -25.1 Dark Up 21.3 183.7 Low 07:21:26 - 07:51:26 2058
Tonasket 07:36:26 -25.3 Dark Up 21.6 183.7 Low 07:21:26 - 07:51:26 2048
Okanogan 07:36:26 -25.7 Dark Up 21.9 183.6 Low 07:21:26 - 07:51:26 2037
Brewster 07:36:27 -25.9 Dark Up 22.2 183.4 Low 07:21:27 - 07:51:27 2030
Manson/Chelan 07:36:28 -26.1 Dark Up 22.4 183.0 Low 07:21:28 - 07:51:28 2029
Entiat 07:36:28 -26.3 Dark Up 22.6 182.9 Low 07:21:28 - 07:51:28 2021
Wenatchee 07:36:29 -26.5 Dark Up 22.9 182.8 Low 07:21:29 - 07:51:29 2012
Ellensburg 07:36:30 -26.9 Dark Up 23.3 182.6 Low 07:21:30 - 07:51:30 1999
Yakima 07:36:30 -27.3 Dark Up 23.7 182.6 Low 07:21:30 - 07:51:30 1981
Toppenish/White Swan 07:36:30 -27.6 Dark Up 23.9 182.8 Low 07:21:30 - 07:51:30 1968
Goldendale 07:36:30 -28.1 Dark Up 24.5 182.4 Low 07:21:30 - 07:51:30 1952
The Dalles 07:36:32 -28.2 Dark Up 24.7 182.0 Low 07:21:32 - 07:51:32 1949
Pasco 07:36:26 -27.8 Dark Up 24.0 184.1 Low 07:21:26 - 07:51:26 1936
Maupin 07:36:31 -28.7 Dark Up 25.1 182.1 Low 07:21:31 - 07:51:31 1928
George/Umatilla 07:36:26 -28.1 Dark Up 24.3 183.9 Low 07:21:26 - 07:51:26 1925
PNWRO 07:36:25 -28.1 Dark Up 24.2 184.3 Low 07:21:25 - 07:51:25 1920
Madras/Culver 07:36:32 -29.2 Dark Up 25.7 182.1 Low 07:21:32 - 07:51:32 1903
Sisters 07:36:34 -29.5 Dark Up 26.0 181.6 Low 07:21:34 - 07:51:34 1897
Redmond 07:36:32 -29.6 Dark Up 26.0 182.0 Low 07:21:32 - 07:51:32 1887
Bend 07:36:33 -29.7 Dark Up 26.3 181.9 Low 07:21:33 - 07:51:33 1880
Oregon Observatory 07:36:34 -29.9 Dark Up 26.4 181.8 Low 07:21:34 - 07:51:34 1874
La Pine/Gilchrist 07:36:34 -30.1 Dark Up 26.6 181.7 Low 07:21:34 - 07:51:34 1866
North Lake 07:36:32 -30.6 Dark Up 27.1 182.3 Low 07:21:32 - 07:51:32 1831
Chiloquin 07:36:35 -31.2 Dark Up 27.8 181.3 Low 07:21:35 - 07:51:35 1818
Klamath Falls 07:36:35 -31.5 Dark Up 28.1 181.4 Low 07:21:35 - 07:51:35 1799
Paisley 07:36:31 -31.2 Dark Up 27.6 182.7 Low 07:21:31 - 07:51:31 1796
Tulelake 07:36:34 -31.8 Dark Up 28.4 181.8 Low 07:21:34 - 07:51:34 1778
Lakeview 07:36:30 -31.7 Dark Up 28.1 182.9 Low 07:21:30 - 07:51:30 1765
Fall River/Burney 07:36:35 -32.7 Dark Up 29.3 181.9 Low 07:21:35 - 07:51:35 1729
Cedarville 07:36:31 -32.4 Dark Up 28.7 183.1 Low 07:21:31 - 07:51:31 1727
Susanville 07:36:33 -33.4 Dark Up 29.9 182.7 Low 07:21:33 - 07:51:33 1678
Greenville 07:36:34 -33.7 Dark Up 30.2 182.4 Up 07:21:34 - 07:51:34 1670
Gimple 07:36:34 -33.7 Dark Up 30.2 182.4 Up 07:21:34 - 07:51:34 1668
Quincy 07:36:34 -33.9 Dark Up 30.4 182.4 Up 07:21:34 - 07:51:34 1659
Portola 07:36:32 -34.0 Dark Up 30.5 182.9 Up 07:21:32 - 07:51:32 1641
Reno 07:36:30 -34.4 Dark Up 30.7 183.6 Up 07:21:30 - 07:51:30 1611
Carson City 07:36:30 -34.7 Dark Up 31.1 183.6 Up 07:21:30 - 07:51:30 1590
Gardnerville 07:36:30 -35.0 Dark Up 31.3 183.7 Up 07:21:30 - 07:51:30 1575
Yerington 07:36:28 -35.0 Dark Up 31.2 184.3 Up 07:21:28 - 07:51:28 1564
Hawthorne 07:36:27 -35.5 Dark Up 31.7 184.9 Up 07:21:27 - 07:51:27 1525
Lee Vining 07:36:29 -36.0 Dark Up 32.3 184.4 Up 07:21:29 - 07:51:29 1504
Tonopah 07:36:22 -36.1 Dark Up 32.0 186.5 Up 07:21:22 - 07:51:22 1462
Bishop 07:36:26 -36.7 Dark Up 32.8 185.3 Up 07:21:26 - 07:51:26 1450
Lone Pine 07:36:26 -37.5 Dark Up 33.5 185.7 Up 07:21:26 - 07:51:26 1396
Beatty 07:36:21 -37.3 Dark Up 33.1 187.1 Up 07:21:21 - 07:51:21 1381
CPSLO 07:36:35 -38.5 Dark Up 35.0 182.8 Up 07:21:35 - 07:51:35 1380
Indian Springs 07:36:17 -37.7 Dark Up 33.3 188.3 Up 07:21:17 - 07:51:17 1333
Henderson 07:36:16 -38.2 Dark Up 33.8 189.1 Up 07:21:16 - 07:51:16 1281
Niwot 07:35:43 -33.8 Dark Up 28.0 199.0 Low 07:20:43 - 07:50:43 1258
Wildwood 07:36:29 -39.9 Dark Up 36.1 185.2 Up 07:21:29 - 07:51:29 1252
Searchlight/Boulder City 07:36:16 -38.8 Dark Up 34.3 189.3 Up 07:21:16 - 07:51:16 1243
Laughlin/Bullhead City 07:36:14 -39.1 Dark Up 34.6 189.7 Up 07:21:14 - 07:51:14 1215
Patrick 07:36:12 -38.9 Dark Up 34.2 190.4 Up 07:21:12 - 07:51:12 1211
Kingman/Dolan Springs 07:36:12 -39.1 Dark Up 34.5 190.3 Up 07:21:12 - 07:51:12 1202
Mohave Valley 07:36:14 -39.4 Dark Up 34.9 189.7 Up 07:21:14 - 07:51:14 1197
Idyllwild 07:36:22 -40.4 Dark Up 36.3 187.4 Up 07:21:22 - 07:51:22 1179
DCO 07:36:09 -39.2 Dark Up 34.4 191.3 Up 07:21:09 - 07:51:09 1172
Lake Havasu City 07:36:14 -39.8 Dark Up 35.2 190.1 Up 07:21:14 - 07:51:14 1164
Parker 07:36:13 -40.1 Dark Up 35.6 190.1 Up 07:21:13 - 07:51:13 1140
Blythe 07:36:15 -40.7 Dark Up 36.1 189.9 Up 07:21:15 - 07:51:15 1114
Calipatria 07:36:19 -41.1 Dark Up 36.7 188.9 Up 07:21:19 - 07:51:19 1106
Yuma 07:36:15 -41.6 Dark Up 37.0 189.9 Up 07:21:15 - 07:51:15 1052

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 04MU8, (2020/08/09 07:38UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 33.30  49
38Zet Sgr      19:02:36.7 -29:52:49  2.7 23.70  97
15Ups Cap      20:40:02.9 -18:08:20  5.2  1.67  74
PPM 237612     20:34:27.6 -19:23:54  8.2  0.69  75
PPM 237688     20:37:22.5 -19:50:57  8.9  0.20  75
04MU8          20:37:08.9 -19:39:39 13.5        75
Positions are for J2000

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

Marc W. Buie, Southwest Research Institute

RECON