RECON: TNO occultation with 04HX78

Event between 04HX78 and star GA0760:08902357 with event index number of 1075887

Geocentric closest approach at 2021/06/08 09:08:07 UTC

J2000 position of star is 17:42:36.9 -13:13:46
Equinox of date position of star is 17:43:49.0 -13:14:17
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 149 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 33.6 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 23.7 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 222 seconds.
The 1-sigma cross-track error in the shadow position is 1927 km.
The sky-plane scale is 23665.8 km/arcsec.

The TNO has an absolute magnitude Hv=8.2
Diameter=140.0 km assuming a 5% albedo -- 5.9 sec chord
Diameter=57.1 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2021/06/08 09:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.5 -26:28:40  0.9 21.65 164
35Eta Oph      17:11:36.5 -15:45:00  2.6  8.19 157
56Omi Ser      17:42:37.2 -12:53:06  4.4  0.46 149
PPM 233465     17:42:58.3 -13:19:27  8.0  0.22 149
PPM 233484     17:43:34.9 -13:14:26  9.7  0.06 149
04HX78         17:43:49.5 -13:14:17 17.0       148
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 4.1 sigma about the mid-time.
The median site spacing is 16.9 km RECON observability=1.0 and success probability=15.0%
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 09:08:09 -15.2 AT Down 26.0 189.8 Low 08:53:09 - 09:23:09 1224
Kelowna 09:08:09 -15.6 AT Down 26.4 189.7 Low 08:53:09 - 09:23:09 1204
Peachland 09:08:10 -15.7 AT Down 26.6 189.4 Low 08:53:10 - 09:23:10 1197
Summerland 09:08:09 -15.8 AT Down 26.7 189.5 Low 08:53:09 - 09:23:09 1190
Penticton 09:08:09 -15.9 AT Down 26.8 189.6 Low 08:53:09 - 09:23:09 1188
Oliver 09:08:08 -16.2 AT Down 27.1 189.6 Low 08:53:08 - 09:23:08 1170
Anarchist Mountain Observatory 09:08:08 -16.4 AT Down 27.3 189.9 Low 08:53:08 - 09:23:08 1163
Tonasket 09:08:08 -16.7 AT Down 27.6 189.8 Low 08:53:08 - 09:23:08 1147
Okanogan 09:08:08 -17.0 AT Down 27.9 189.7 Low 08:53:08 - 09:23:08 1129
Brewster 09:08:08 -17.3 AT Down 28.2 189.5 Low 08:53:08 - 09:23:08 1113
Victoria 09:08:20 -17.5 AT Down 28.1 185.5 Low 08:53:20 - 09:23:20 1112
Manson/Chelan 09:08:10 -17.6 AT Down 28.4 189.1 Low 08:53:10 - 09:23:10 1100
Wenatchee 09:08:10 -18.1 Dark Down 28.9 188.9 Low 08:53:10 - 09:23:10 1074
Ellensburg 09:08:10 -18.5 Dark Down 29.4 188.7 Low 08:53:10 - 09:23:10 1051
Yakima 09:08:10 -18.9 Dark Down 29.8 188.8 Low 08:53:10 - 09:23:10 1029
Pasco 09:08:05 -18.9 Dark Down 29.9 190.4 Low 08:53:05 - 09:23:05 1019
Toppenish/White Swan 09:08:09 -19.1 Dark Down 30.0 189.0 Low 08:53:09 - 09:23:09 1018
PNWRO 09:08:04 -19.1 Dark Down 30.2 190.6 Up 08:53:04 - 09:23:04 1007
Goldendale 09:08:10 -19.7 Dark Down 30.6 188.5 Up 08:53:10 - 09:23:10 985
The Dalles 09:08:11 -20.0 Dark Down 30.8 188.1 Up 08:53:11 - 09:23:11 970
Maupin 09:08:11 -20.4 Dark Down 31.2 188.3 Up 08:53:11 - 09:23:11 947
Redmond 09:08:10 -21.2 Dark Down 32.1 188.3 Up 08:53:10 - 09:23:10 895
Sisters 09:08:12 -21.3 Dark Down 32.1 187.8 Up 08:53:12 - 09:23:12 893
Bend 09:08:11 -21.5 Dark Down 32.4 188.1 Up 08:53:11 - 09:23:11 881
Oregon Observatory 09:08:11 -21.7 Dark Down 32.5 188.0 Up 08:53:11 - 09:23:11 870
La Pine/Gilchrist 09:08:11 -21.9 Dark Down 32.7 187.9 Up 08:53:11 - 09:23:11 858
North Lake 09:08:09 -22.2 Dark Down 33.1 188.7 Up 08:53:09 - 09:23:09 836
Paisley 09:08:07 -22.6 Dark Down 33.6 189.1 Up 08:53:07 - 09:23:07 805
Chiloquin 09:08:11 -23.0 Dark Down 33.9 187.6 Up 08:53:11 - 09:23:11 788
Lakeview 09:08:06 -23.1 Dark Down 34.1 189.4 Up 08:53:06 - 09:23:06 775
Klamath Falls 09:08:11 -23.3 Dark Down 34.2 187.8 Up 08:53:11 - 09:23:11 768
Cedarville 09:08:05 -23.7 Dark Down 34.7 189.7 Up 08:53:05 - 09:23:05 735
Dunrhomin 09:07:13 -20.2 Dark Down 32.4 206.7 Up 08:52:13 - 09:22:13 716
Fall River/Burney 09:08:09 -24.4 Dark Down 35.3 188.3 Up 08:53:09 - 09:23:09 696
Susanville 09:08:06 -24.8 Dark Down 35.9 189.3 Up 08:53:06 - 09:23:06 661
Gimple 09:08:06 -25.2 Dark Down 36.2 189.0 Up 08:53:06 - 09:23:06 642
Greenville 09:08:07 -25.2 Dark Down 36.2 188.9 Up 08:53:07 - 09:23:07 641
Quincy 09:08:07 -25.4 Dark Down 36.4 189.0 Up 08:53:07 - 09:23:07 628
Portola 09:08:05 -25.4 Dark Down 36.5 189.5 Up 08:53:05 - 09:23:05 623
Reno 09:08:02 -25.5 Dark Down 36.6 190.3 Up 08:53:02 - 09:23:02 610
Carson City 09:08:02 -25.8 Dark Down 37.0 190.4 Up 08:53:02 - 09:23:02 587
Yerington 09:08:00 -25.9 Dark Down 37.1 191.2 Up 08:53:00 - 09:23:00 578
Gardnerville 09:08:01 -26.0 Dark Down 37.2 190.5 Up 08:53:01 - 09:23:01 571
Hawthorne 09:07:57 -26.2 Dark Down 37.5 191.9 Up 08:52:57 - 09:22:57 550
Tonopah 09:07:52 -26.2 Dark Down 37.7 193.7 Up 08:52:52 - 09:22:52 528
Lee Vining 09:07:59 -26.8 Dark Down 38.1 191.4 Up 08:52:59 - 09:22:59 509
Bishop 09:07:56 -27.2 Dark Down 38.6 192.4 Up 08:52:56 - 09:22:56 473
Beatty 09:07:49 -27.2 Dark Down 38.7 194.4 Up 08:52:49 - 09:22:49 450
Indian Springs 09:07:45 -27.2 Dark Down 38.8 195.8 Up 08:52:45 - 09:22:45 434
Henderson 09:07:42 -27.5 Dark Down 39.2 196.7 Up 08:52:42 - 09:22:42 400
Patrick 09:07:37 -27.7 Dark Down 39.5 198.2 Up 08:52:37 - 09:22:37 361
Kingman/Dolan Springs 09:07:38 -27.9 Dark Down 39.8 198.1 Up 08:52:38 - 09:22:38 344
Laughlin/Bullhead City 09:07:40 -28.1 Dark Down 39.9 197.4 Up 08:52:40 - 09:22:40 339
Mohave Valley 09:07:39 -28.4 Dark Down 40.2 197.5 Up 08:52:39 - 09:22:39 320
CPSLO 09:08:02 -29.7 Dark Down 40.9 189.9 Up 08:53:02 - 09:23:02 311
Lake Havasu City 09:07:38 -28.7 Dark Down 40.5 197.9 Up 08:52:38 - 09:22:38 292
Parker 09:07:38 -29.0 Dark Down 40.8 198.0 Up 08:52:38 - 09:22:38 266
George/Scottsdale 09:07:28 -28.5 Dark Down 40.5 201.1 Up 08:52:28 - 09:22:28 246
Wildwood 09:07:54 -30.3 Dark Down 41.8 192.7 Up 08:52:54 - 09:22:54 237
Blythe 09:07:38 -29.6 Dark Down 41.4 197.8 Up 08:52:38 - 09:22:38 226
Idyllwild 09:07:46 -30.1 Dark Down 41.8 195.2 Up 08:52:46 - 09:22:46 224
Calipatria 09:07:41 -30.3 Dark Down 42.1 196.8 Up 08:52:41 - 09:22:41 184
Yuma 09:07:38 -30.4 Dark Down 42.3 198.0 Up 08:52:38 - 09:22:38 156

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, (2021/06/08 09:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.65 164
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.19 157
56Omi Ser      17:41:24.8 -12:52:32  4.4  0.46 149
PPM 233465     17:41:45.6 -13:18:54  8.0  0.22 149
PPM 233484     17:42:22.3 -13:13:54  9.7  0.06 149
04HX78         17:42:36.9 -13:13:46 17.0       149
Positions are for J2000

Event circumstances last updated at 2021/04/18 22:56:18 UT

Marc W. Buie, Southwest Research Institute

RECON