RECON: TNO occultation with 04HX78

Event between 04HX78 and star GA0760:10464220 with event index number of 2010984

Geocentric closest approach at 2022/05/10 11:03:52 UTC

J2000 position of star is 17:53:20.2 -12:56:08
Equinox of date position of star is 17:54:35.3 -12:56:19
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 111 degrees from the moon. Moon is 64% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 33.7 AU from the Sun and 32.9 AU from the Earth.
The TNO is moving 18.0 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 309 seconds.
The 1-sigma cross-track error in the shadow position is 3270 km.
The sky-plane scale is 23850.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=159.2 km assuming a 5% albedo -- 8.9 sec chord
Diameter=65.0 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2022/05/10 11:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.9 -26:28:47  0.9 23.86  94
35Eta Oph      17:11:39.7 -15:45:04  2.6 10.77 101
PPM 233722     17:55:22.3 -11:20:25  6.5  1.61 110
PPM 233706     17:54:21.0 -13:39:14  7.4  0.72 111
PPM 233724     17:55:27.4 -13:00:18  9.6  0.22 111
04HX78         17:54:35.8 -12:56:19 14.9       111
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 2.9 sigma about the mid-time.
The median site spacing is 14.7 km RECON observability=0.6 and success probability=4.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:04:05 -2.5 CT Down 22.7 201.2 Low 10:49:05 - 11:19:05 -1133
Kamloops 11:04:56 -10.3 NT Down 26.2 186.3 Low 10:49:56 - 11:19:56 -1403
Kelowna 11:04:51 -10.5 NT Down 26.9 187.3 Low 10:49:51 - 11:19:51 -1426
Peachland 11:04:52 -10.7 NT Down 27.1 187.0 Low 10:49:52 - 11:19:52 -1436
Summerland 11:04:51 -10.7 NT Down 27.2 187.1 Low 10:49:51 - 11:19:51 -1441
Penticton 11:04:51 -10.7 NT Down 27.3 187.2 Low 10:49:51 - 11:19:51 -1442
Oliver 11:04:51 -11.0 NT Down 27.6 187.2 Low 10:49:51 - 11:19:51 -1459
Anarchist Mountain Observatory 11:04:49 -11.0 NT Down 27.8 187.4 Low 10:49:49 - 11:19:49 -1464
Tonasket 11:04:49 -11.3 NT Down 28.1 187.4 Low 10:49:49 - 11:19:49 -1480
Okanogan 11:04:49 -11.6 NT Down 28.4 187.2 Low 10:49:49 - 11:19:49 -1500
Brewster 11:04:50 -11.9 NT Down 28.7 187.0 Low 10:49:50 - 11:19:50 -1517
Manson/Chelan 11:04:51 -12.2 AT Down 28.9 186.6 Low 10:49:51 - 11:19:51 -1534
Wenatchee 11:04:51 -12.6 AT Down 29.4 186.5 Low 10:49:51 - 11:19:51 -1561
Victoria 11:05:00 -13.2 AT Down 28.5 183.0 Low 10:50:00 - 11:20:00 -1563
Ellensburg 11:04:51 -13.0 AT Down 29.9 186.3 Low 10:49:51 - 11:19:51 -1586
Yakima 11:04:51 -13.3 AT Down 30.3 186.3 Up 10:49:51 - 11:19:51 -1607
PNWRO 11:04:43 -12.9 AT Down 30.7 188.2 Up 10:49:43 - 11:19:43 -1608
Toppenish/White Swan 11:04:50 -13.3 AT Down 30.5 186.5 Up 10:49:50 - 11:19:50 -1616
Goldendale 11:04:51 -13.9 AT Down 31.1 186.0 Up 10:49:51 - 11:19:51 -1653
The Dalles 11:04:53 -14.3 AT Down 31.3 185.6 Up 10:49:53 - 11:19:53 -1673
Maupin 11:04:51 -14.5 AT Down 31.7 185.8 Up 10:49:51 - 11:19:51 -1693
Dunrhomin 11:03:34 -8.6 NT Down 33.5 204.3 Up 10:48:34 - 11:18:34 -1700
CU-SBO 11:03:34 -8.8 NT Down 33.7 204.3 Up 10:48:34 - 11:18:34 -1716
Sisters 11:04:53 -15.4 AT Down 32.6 185.3 Up 10:49:53 - 11:19:53 -1751
Bend 11:04:51 -15.4 AT Down 32.8 185.6 Up 10:49:51 - 11:19:51 -1760
Oregon Observatory 11:04:51 -15.6 AT Down 33.0 185.4 Up 10:49:51 - 11:19:51 -1772
North Lake 11:04:49 -15.8 AT Down 33.6 186.1 Up 10:49:49 - 11:19:49 -1798
Lakeview 11:04:45 -16.3 AT Down 34.6 186.8 Up 10:49:45 - 11:19:45 -1849
Chiloquin 11:04:52 -16.8 AT Down 34.4 185.0 Up 10:49:52 - 11:19:52 -1857
Klamath Falls 11:04:51 -17.0 AT Down 34.7 185.1 Up 10:49:51 - 11:19:51 -1876
Cedarville 11:04:43 -16.6 AT Down 35.3 187.1 Up 10:49:43 - 11:19:43 -1885
Fall River/Burney 11:04:48 -17.6 AT Down 35.8 185.7 Up 10:49:48 - 11:19:48 -1940
Susanville 11:04:44 -17.6 AT Down 36.4 186.6 Up 10:49:44 - 11:19:44 -1964
Gimple 11:04:45 -17.9 AT Down 36.7 186.4 Up 10:49:45 - 11:19:45 -1986
Greenville 11:04:45 -18.0 AT Down 36.7 186.2 Up 10:49:45 - 11:19:45 -1987
Portola 11:04:42 -18.0 AT Down 37.0 186.8 Up 10:49:42 - 11:19:42 -1998
Quincy 11:04:44 -18.1 Dark Down 36.9 186.3 Up 10:49:44 - 11:19:44 -2000
Reno 11:04:39 -17.8 AT Down 37.2 187.6 Up 10:49:39 - 11:19:39 -2001
Yerington 11:04:35 -17.8 AT Down 37.7 188.5 Up 10:49:35 - 11:19:35 -2023
Carson City 11:04:39 -18.0 Dark Down 37.6 187.7 Up 10:49:39 - 11:19:39 -2023
Gardnerville 11:04:38 -18.2 Dark Down 37.8 187.8 Up 10:49:38 - 11:19:38 -2038
Hawthorne 11:04:32 -17.8 AT Down 38.1 189.2 Up 10:49:32 - 11:19:32 -2042
Tonopah 11:04:25 -17.3 AT Down 38.3 190.9 Up 10:49:25 - 11:19:25 -2044
Lee Vining 11:04:34 -18.5 Dark Down 38.7 188.7 Up 10:49:34 - 11:19:34 -2089
Beatty 11:04:21 -17.8 AT Down 39.4 191.7 Up 10:49:21 - 11:19:21 -2111
Indian Springs 11:04:15 -17.3 AT Down 39.5 193.0 Up 10:49:15 - 11:19:15 -2112
Bishop 11:04:29 -18.4 Dark Down 39.2 189.6 Up 10:49:29 - 11:19:29 -2114
Henderson 11:04:12 -17.2 AT Down 39.9 194.0 Up 10:49:12 - 11:19:12 -2134
Patrick 11:04:05 -16.9 AT Down 40.3 195.5 Up 10:49:05 - 11:19:05 -2154
Kingman/Dolan Springs 11:04:05 -17.2 AT Down 40.6 195.3 Up 10:49:05 - 11:19:05 -2173
Laughlin/Bullhead City 11:04:08 -17.5 AT Down 40.7 194.7 Up 10:49:08 - 11:19:08 -2186
Mohave Valley 11:04:07 -17.7 AT Down 41.0 194.7 Up 10:49:07 - 11:19:07 -2204
Lake Havasu City 11:04:05 -17.8 AT Down 41.3 195.1 Up 10:49:05 - 11:19:05 -2227
George/Scottsdale 11:03:52 -16.6 AT Down 41.5 198.4 Up 10:48:52 - 11:18:52 -2233
Parker 11:04:04 -17.9 AT Down 41.6 195.2 Up 10:49:04 - 11:19:04 -2251
Idyllwild 11:04:16 -19.8 Dark Down 42.5 192.3 Up 10:49:16 - 11:19:16 -2328
Wildwood 11:04:25 -20.7 Dark Down 42.4 189.8 Up 10:49:25 - 11:19:25 -2343
Calipatria 11:04:09 -19.4 Dark Down 42.9 193.9 Up 10:49:09 - 11:19:09 -2348
Yuma 11:04:03 -19.1 Dark Down 43.1 195.1 Up 10:49:03 - 11:19:03 -2361

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 04HX78, (2022/05/10 11:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.86  94
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.77 101
PPM 233722     17:54:07.6 -11:20:15  6.5  1.61 110
PPM 233706     17:53:05.0 -13:39:02  7.4  0.72 111
PPM 233724     17:54:11.7 -13:00:08  9.6  0.22 111
04HX78         17:53:20.2 -12:56:08 14.9       110
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:12:33 UT

Marc W. Buie, Southwest Research Institute

RECON