RECON: TNO occultation with 04HX78

Event between 04HX78 and star GA0760:09806524 with event index number of 2011041

Geocentric closest approach at 2022/06/30 04:18:29 UTC

J2000 position of star is 17:48:40.9 -12:47:22
Equinox of date position of star is 17:49:55.8 -12:47:42
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 153 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 33.7 AU from the Sun and 32.7 AU from the Earth.
The TNO is moving 23.4 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 257 seconds.
The 1-sigma cross-track error in the shadow position is 1770 km.
The sky-plane scale is 23708.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=159.2 km assuming a 5% albedo -- 6.8 sec chord
Diameter=65.0 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2022/06/30 04:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.4 -26:28:48  0.9 23.06 140
35Eta Oph      17:11:40.2 -15:45:04  2.6  9.73 146
56Omi Ser      17:42:40.8 -12:53:07  4.4  1.77 151
PPM 233639     17:51:11.4 -12:36:52  8.1  0.35 153
PPM 233623     17:50:27.4 -12:59:38  9.4  0.23 153
04HX78         17:49:56.8 -12:47:43 16.1       153
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 3.5 sigma about the mid-time.
The median site spacing is 26.8 km RECON observability=0.1 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 04:19:59 -6.3 NT Up 20.2 148.8 Low 04:04:59 - 04:34:59 10787
Kamloops 04:20:35 -1.2 CT Up 15.8 135.1 Really Low 04:05:35 - 04:35:35 10557
Kelowna 04:20:35 -2.1 CT Up 16.8 135.7 Really Low 04:05:35 - 04:35:35 10521
Peachland 04:20:36 -2.1 CT Up 16.7 135.4 Really Low 04:05:36 - 04:35:36 10511
Summerland 04:20:36 -2.2 CT Up 16.9 135.5 Really Low 04:05:36 - 04:35:36 10504
Penticton 04:20:36 -2.3 CT Up 17.0 135.6 Really Low 04:05:36 - 04:35:36 10501
Oliver 04:20:38 -2.5 CT Up 17.2 135.5 Really Low 04:05:38 - 04:35:38 10481
Anarchist Mountain Observatory 04:20:38 -2.7 CT Up 17.4 135.6 Really Low 04:05:38 - 04:35:38 10474
Tonasket 04:20:39 -2.9 CT Up 17.6 135.5 Really Low 04:05:39 - 04:35:39 10454
Okanogan 04:20:39 -3.1 CT Up 17.8 135.3 Really Low 04:05:39 - 04:35:39 10432
Brewster 04:20:40 -3.1 CT Up 17.9 135.1 Really Low 04:05:40 - 04:35:40 10413
Manson/Chelan 04:20:42 -3.1 CT Up 17.9 134.7 Really Low 04:05:42 - 04:35:42 10395
Victoria 04:20:47 -1.0 CT Up 15.9 132.0 Really Low 04:05:47 - 04:35:47 10391
Wenatchee 04:20:43 -3.3 CT Up 18.1 134.4 Really Low 04:05:43 - 04:35:43 10364
Ellensburg 04:20:45 -3.5 CT Up 18.3 134.2 Really Low 04:05:45 - 04:35:45 10336
Yakima 04:20:46 -3.7 CT Up 18.6 134.0 Really Low 04:05:46 - 04:35:46 10310
Toppenish/White Swan 04:20:46 -3.9 CT Up 18.8 134.1 Really Low 04:05:46 - 04:35:46 10298
PNWRO 04:20:43 -5.0 CT Up 19.8 135.4 Really Low 04:05:43 - 04:35:43 10295
Goldendale 04:20:48 -4.1 CT Up 19.0 133.6 Really Low 04:05:48 - 04:35:48 10257
The Dalles 04:20:50 -4.0 CT Up 19.0 133.3 Really Low 04:05:50 - 04:35:50 10238
Maupin 04:20:50 -4.4 CT Up 19.3 133.3 Really Low 04:05:50 - 04:35:50 10212
Sisters 04:20:53 -4.6 CT Up 19.7 132.6 Really Low 04:05:53 - 04:35:53 10147
Bend 04:20:53 -4.9 CT Up 20.0 132.8 Really Low 04:05:53 - 04:35:53 10135
Oregon Observatory 04:20:54 -5.0 CT Up 20.0 132.6 Low 04:05:54 - 04:35:54 10122
North Lake 04:20:54 -5.7 CT Up 20.7 132.9 Low 04:05:54 - 04:35:54 10086
Dunrhomin 04:20:16 -16.0 AT Down 30.5 146.7 Up 04:05:16 - 04:35:16 10080
CU-SBO 04:20:17 -16.1 AT Down 30.7 146.5 Up 04:05:17 - 04:35:17 10061
Chiloquin 04:20:58 -5.6 CT Up 20.7 131.9 Low 04:05:58 - 04:35:58 10026
Lakeview 04:20:55 -6.7 NT Up 21.7 133.1 Low 04:05:55 - 04:35:55 10021
Klamath Falls 04:20:58 -5.8 CT Up 20.9 131.9 Low 04:05:58 - 04:35:58 10003
Cedarville 04:20:56 -7.2 NT Up 22.3 133.1 Low 04:05:56 - 04:35:56 9977
Fall River/Burney 04:21:00 -6.8 NT Up 22.0 131.9 Low 04:06:00 - 04:36:00 9925
Susanville 04:20:59 -7.6 NT Up 22.8 132.3 Low 04:05:59 - 04:35:59 9891
Gimple 04:21:01 -7.7 NT Up 22.9 132.0 Low 04:06:01 - 04:36:01 9867
Greenville 04:21:01 -7.7 NT Up 22.8 132.0 Low 04:06:01 - 04:36:01 9866
Quincy 04:21:01 -7.8 NT Up 23.0 131.9 Low 04:06:01 - 04:36:01 9852
Portola 04:21:01 -8.1 NT Up 23.3 132.3 Low 04:06:01 - 04:36:01 9850
Reno 04:20:59 -8.7 NT Up 23.9 132.8 Low 04:05:59 - 04:35:59 9840
Carson City 04:21:00 -8.9 NT Up 24.1 132.7 Low 04:06:00 - 04:36:00 9814
Yerington 04:20:58 -9.4 NT Up 24.6 133.1 Low 04:05:58 - 04:35:58 9809
Gardnerville 04:21:00 -9.1 NT Up 24.3 132.6 Low 04:06:00 - 04:36:00 9796
Hawthorne 04:20:57 -10.1 NT Up 25.2 133.5 Low 04:05:57 - 04:35:57 9782
Tonopah 04:20:54 -11.2 NT Down 26.3 134.5 Low 04:05:54 - 04:35:54 9768
Lee Vining 04:21:01 -10.1 NT Up 25.3 132.8 Low 04:06:01 - 04:36:01 9733
Bishop 04:21:00 -11.0 NT Down 26.2 133.3 Low 04:06:00 - 04:36:00 9698
Beatty 04:20:55 -12.2 AT Down 27.4 134.5 Low 04:05:55 - 04:35:55 9686
Indian Springs 04:20:53 -13.1 AT Down 28.2 135.4 Low 04:05:53 - 04:35:53 9677
Henderson 04:20:52 -13.9 AT Down 29.0 135.8 Low 04:05:52 - 04:35:52 9645
Patrick 04:20:50 -14.9 AT Down 30.1 136.6 Up 04:05:50 - 04:35:50 9613
Kingman/Dolan Springs 04:20:51 -15.0 AT Down 30.2 136.3 Up 04:05:51 - 04:35:51 9593
Laughlin/Bullhead City 04:20:53 -14.7 AT Down 29.9 135.8 Low 04:05:53 - 04:35:53 9583
Mohave Valley 04:20:53 -14.9 AT Down 30.1 135.7 Up 04:05:53 - 04:35:53 9562
Lake Havasu City 04:20:52 -15.3 AT Down 30.5 135.8 Up 04:05:52 - 04:35:52 9534
George/Scottsdale 04:20:46 -17.3 AT Down 32.5 137.7 Up 04:05:46 - 04:35:46 9507
Parker 04:20:53 -15.6 AT Down 30.8 135.7 Up 04:05:53 - 04:35:53 9506
Idyllwild 04:21:00 -14.4 AT Down 29.6 133.3 Low 04:06:00 - 04:36:00 9439
Wildwood 04:21:06 -13.0 AT Down 28.3 131.9 Low 04:06:06 - 04:36:06 9438
Calipatria 04:20:58 -15.5 AT Down 30.8 134.1 Up 04:05:58 - 04:35:58 9406
Yuma 04:20:57 -16.4 AT Down 31.6 134.7 Up 04:05:57 - 04:35:57 9384

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, (2022/06/30 04:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.06 140
35Eta Oph      17:10:22.7 -15:43:29  2.6  9.73 146
56Omi Ser      17:41:24.8 -12:52:32  4.4  1.77 151
PPM 233639     17:49:55.5 -12:36:33  8.1  0.35 153
PPM 233623     17:49:11.3 -12:59:18  9.4  0.23 153
04HX78         17:48:40.9 -12:47:22 16.1       153
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:14:40 UT

Marc W. Buie, Southwest Research Institute

RECON