RECON: TNO occultation with 04MT8

Event between 04MT8 and star GA0680:36092184 with event index number of 1078325

Geocentric closest approach at 2021/08/22 04:10:31 UTC

J2000 position of star is 20:32:37.0 -20:18:01
Equinox of date position of star is 20:33:50.0 -20:13:40
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 20 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 44.9 AU from the Sun and 44.0 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 779 seconds.
The 1-sigma cross-track error in the shadow position is 4358 km.
The sky-plane scale is 31898.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=291.1 km assuming a 5% albedo -- 13.0 sec chord
Diameter=118.8 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 04MT8, (2021/08/22 04:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:50.5 -29:30:26  1.2 34.01  18
38Zet Sgr      19:03:59.2 -29:50:50  2.7 22.46  41
10Pi Cap       20:28:33.4 -18:08:22  5.2  2.43  21
PPM 271311     20:35:09.3 -20:27:48  8.1  0.38  20
PPM 271279     20:33:51.2 -20:02:46  9.0  0.18  20
04MT8          20:33:51.9 -20:13:32 15.6        20
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 1.2 sigma about the mid-time.
The median site spacing is 14.6 km RECON observability=0.4 and success probability=2.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 04:11:09 -10.5 NT Up 13.3 147.4 Really Low 03:56:09 - 04:26:09 -355
Kelowna 04:11:10 -10.7 NT Up 13.6 147.2 Really Low 03:56:10 - 04:26:10 -366
Peachland 04:11:11 -10.6 NT Up 13.6 146.9 Really Low 03:56:11 - 04:26:11 -369
Summerland 04:11:12 -10.7 NT Up 13.8 147.0 Really Low 03:56:12 - 04:26:12 -374
Penticton 04:11:11 -10.8 NT Up 13.8 147.1 Really Low 03:56:11 - 04:26:11 -376
Oliver 04:11:12 -11.0 NT Up 14.1 147.1 Really Low 03:56:12 - 04:26:12 -387
Anarchist Mountain Observatory 04:11:12 -11.2 NT Up 14.4 147.2 Really Low 03:56:12 - 04:26:12 -392
Tonasket 04:11:13 -11.3 NT Up 14.6 147.1 Really Low 03:56:13 - 04:26:13 -403
Victoria 04:11:25 -9.2 NT Up 13.3 143.6 Really Low 03:56:25 - 04:26:25 -410
Okanogan 04:11:14 -11.4 NT Up 14.8 146.9 Really Low 03:56:14 - 04:26:14 -413
Brewster 04:11:16 -11.4 NT Up 15.0 146.7 Really Low 03:56:16 - 04:26:16 -422
Manson/Chelan 04:11:17 -11.3 NT Up 15.0 146.4 Really Low 03:56:17 - 04:26:17 -429
Wenatchee 04:11:19 -11.5 NT Up 15.4 146.1 Really Low 03:56:19 - 04:26:19 -446
Ellensburg 04:11:21 -11.6 NT Up 15.6 145.9 Really Low 03:56:21 - 04:26:21 -460
Yakima 04:11:22 -11.8 NT Up 15.9 145.8 Really Low 03:56:22 - 04:26:22 -474
Toppenish/White Swan 04:11:22 -12.0 AT Up 16.2 145.9 Really Low 03:56:22 - 04:26:22 -482
Pasco 04:11:18 -12.8 AT Up 16.8 147.0 Really Low 03:56:18 - 04:26:18 -488
PNWRO 04:11:19 -13.1 AT Up 17.1 147.2 Really Low 03:56:19 - 04:26:19 -497
Goldendale 04:11:24 -12.1 AT Up 16.5 145.5 Really Low 03:56:24 - 04:26:24 -503
The Dalles 04:11:26 -12.0 NT Up 16.5 145.1 Really Low 03:56:26 - 04:26:26 -512
Maupin 04:11:27 -12.2 AT Up 16.9 145.1 Really Low 03:56:27 - 04:26:27 -528
Sisters 04:11:30 -12.4 AT Up 17.4 144.5 Really Low 03:56:30 - 04:26:30 -562
Redmond 04:11:29 -12.7 AT Up 17.6 144.9 Really Low 03:56:29 - 04:26:29 -563
Bend 04:11:30 -12.7 AT Up 17.7 144.7 Really Low 03:56:30 - 04:26:30 -572
Oregon Observatory 04:11:31 -12.7 AT Up 17.8 144.6 Really Low 03:56:31 - 04:26:31 -579
La Pine/Gilchrist 04:11:32 -12.8 AT Up 18.0 144.5 Really Low 03:56:32 - 04:26:32 -587
North Lake 04:11:31 -13.4 AT Up 18.6 144.9 Really Low 03:56:31 - 04:26:31 -605
Paisley 04:11:31 -13.9 AT Up 19.2 145.2 Really Low 03:56:31 - 04:26:31 -629
Klamath Falls 04:11:36 -13.3 AT Up 19.0 144.0 Really Low 03:56:36 - 04:26:36 -649
Lakeview 04:11:32 -14.2 AT Up 19.7 145.2 Really Low 03:56:32 - 04:26:32 -651
Cedarville 04:11:33 -14.7 AT Up 20.3 145.3 Low 03:56:33 - 04:26:33 -680
Fall River/Burney 04:11:38 -14.2 AT Up 20.2 144.1 Low 03:56:38 - 04:26:38 -703
Susanville 04:11:37 -15.0 AT Up 21.0 144.6 Low 03:56:37 - 04:26:37 -732
Greenville 04:11:39 -14.9 AT Up 21.1 144.3 Low 03:56:39 - 04:26:39 -745
Gimple 04:11:38 -15.0 AT Up 21.1 144.4 Low 03:56:38 - 04:26:38 -745
Quincy 04:11:39 -15.0 AT Up 21.3 144.2 Low 03:56:39 - 04:26:39 -755
Portola 04:11:38 -15.4 AT Up 21.6 144.6 Low 03:56:38 - 04:26:38 -761
Reno 04:11:36 -16.0 AT Up 22.1 145.1 Low 03:56:36 - 04:26:36 -774
Carson City 04:11:37 -16.2 AT Up 22.4 145.1 Low 03:56:37 - 04:26:37 -791
Yerington 04:11:36 -16.7 AT Up 22.8 145.6 Low 03:56:36 - 04:26:36 -802
Gardnerville 04:11:38 -16.3 AT Up 22.6 145.1 Low 03:56:38 - 04:26:38 -804
Dunrhomin 04:10:46 -24.4 Dark Up 26.7 159.0 Low 03:55:46 - 04:25:46 -811
Hawthorne 04:11:35 -17.3 AT Up 23.4 146.0 Low 03:56:35 - 04:26:35 -826
Tonopah 04:11:32 -18.4 Dark Up 24.4 147.1 Low 03:56:32 - 04:26:32 -852
Lee Vining 04:11:38 -17.2 AT Up 23.7 145.4 Low 03:56:38 - 04:26:38 -853
Bishop 04:11:37 -18.0 Dark Up 24.5 145.9 Low 03:56:37 - 04:26:37 -886
Beatty 04:11:32 -19.4 Dark Up 25.6 147.3 Low 03:56:32 - 04:26:32 -914
Indian Springs 04:11:29 -20.3 Dark Up 26.3 148.2 Low 03:56:29 - 04:26:29 -935
Henderson 04:11:28 -21.0 Dark Up 27.1 148.7 Low 03:56:28 - 04:26:28 -967
Patrick 04:11:25 -22.1 Dark Up 28.1 149.6 Low 03:56:25 - 04:26:25 -1006
Laughlin/Bullhead City 04:11:28 -21.8 Dark Up 28.0 148.8 Low 03:56:28 - 04:26:28 -1017
Kingman/Dolan Springs 04:11:27 -22.1 Dark Up 28.2 149.3 Low 03:56:27 - 04:26:27 -1017
CPSLO 04:11:40 -17.5 AT Up 25.1 143.3 Low 03:56:40 - 04:26:40 -1018
Mohave Valley 04:11:29 -21.9 Dark Up 28.3 148.8 Low 03:56:29 - 04:26:29 -1033
Lake Havasu City 04:11:29 -22.3 Dark Up 28.7 148.9 Low 03:56:29 - 04:26:29 -1056
Wildwood 04:11:40 -19.6 Dark Up 27.1 144.8 Low 03:56:40 - 04:26:40 -1073
Parker 04:11:29 -22.5 Dark Up 29.0 148.8 Low 03:56:29 - 04:26:29 -1077
Idyllwild 04:11:39 -21.1 Dark Up 28.3 146.4 Low 03:56:39 - 04:26:39 -1091
Blythe 04:11:32 -22.6 Dark Up 29.3 148.4 Low 03:56:32 - 04:26:32 -1107
George/Scottsdale 04:11:21 -24.4 Dark Up 30.4 151.0 Up 03:56:21 - 04:26:21 -1114
Calipatria 04:11:36 -22.2 Dark Up 29.3 147.4 Low 03:56:36 - 04:26:36 -1132
Yuma 04:11:34 -23.1 Dark Up 30.1 148.1 Up 03:56:34 - 04:26:34 -1162

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 04MT8, (2021/08/22 04:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 34.01  18
38Zet Sgr      19:02:36.7 -29:52:49  2.7 22.46  41
10Pi Cap       20:27:19.2 -18:12:43  5.2  2.43  21
PPM 271311     20:33:54.3 -20:32:19  8.1  0.38  20
PPM 271279     20:32:36.4 -20:07:15  9.0  0.18  20
04MT8          20:32:37.0 -20:18:01 15.6        20
Positions are for J2000

Event circumstances last updated at 2021/01/24 21:03:50 UT

Marc W. Buie, Southwest Research Institute

RECON