RECON: TNO occultation with 04HX78

Event between 04HX78 and star GA0780:12292239 with event index number of 2012526

Geocentric closest approach at 2028/06/28 08:52:56 UTC

J2000 position of star is 18:36:42.3 -10:06:42
Equinox of date position of star is 18:37:56.5 -10:05:29
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 108 degrees from the moon. Moon is 37% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 34.1 AU from the Sun and 33.1 AU from the Earth.
The TNO is moving 24.0 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 530 seconds.
The 1-sigma cross-track error in the shadow position is 3401 km.
The sky-plane scale is 23995.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=159.2 km assuming a 5% albedo -- 6.6 sec chord
Diameter=65.0 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2028/06/28 08:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.6 -26:29:33  0.9 34.19  77
Nunki          18:57:01.8 -26:15:31  2.0 16.77 110
PPM 234743     18:36:37.4 -10:57:09  5.0  0.96 107
PPM 234733     18:36:11.2 -10:30:24  8.4  0.66 107
PPM 234752     18:36:57.8 -10:07:38  9.0  0.33 107
04HX78         18:38:16.6 -10:05:09 14.9       108
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 1.7 sigma about the mid-time.
The median site spacing is 19.1 km RECON observability=1.0 and success probability=9.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:51:45 -11.3 NT Down 24.2 206.9 Low 08:36:45 - 09:06:45 3063
Kamloops 08:52:23 -15.3 AT Down 28.5 191.8 Low 08:37:23 - 09:07:23 3053
Kelowna 08:52:20 -16.0 AT Down 29.2 192.9 Low 08:37:20 - 09:07:20 3004
Peachland 08:52:20 -16.2 AT Down 29.4 192.6 Low 08:37:20 - 09:07:20 2999
Summerland 08:52:20 -16.3 AT Down 29.5 192.7 Low 08:37:20 - 09:07:20 2990
Penticton 08:52:19 -16.4 AT Down 29.5 192.8 Low 08:37:19 - 09:07:19 2986
Oliver 08:52:19 -16.7 AT Down 29.9 192.9 Low 08:37:19 - 09:07:19 2966
Anarchist Mountain Observatory 08:52:19 -16.8 AT Down 30.0 193.1 Up 08:37:19 - 09:07:19 2956
Victoria 08:52:31 -17.8 AT Down 31.0 188.6 Up 08:37:31 - 09:07:31 2940
Tonasket 08:52:19 -17.2 AT Down 30.3 193.1 Up 08:37:19 - 09:07:19 2938
Okanogan 08:52:19 -17.5 AT Down 30.7 193.0 Up 08:37:19 - 09:07:19 2919
Brewster 08:52:19 -17.8 AT Down 31.0 192.8 Up 08:37:19 - 09:07:19 2903
Manson/Chelan 08:52:20 -18.0 Dark Down 31.2 192.4 Up 08:37:20 - 09:07:20 2892
Wenatchee 08:52:21 -18.5 Dark Down 31.7 192.2 Up 08:37:21 - 09:07:21 2865
Ellensburg 08:52:21 -19.0 Dark Down 32.2 192.0 Up 08:37:21 - 09:07:21 2841
Yakima 08:52:21 -19.4 Dark Down 32.6 192.1 Up 08:37:21 - 09:07:21 2816
Toppenish/White Swan 08:52:20 -19.6 Dark Down 32.7 192.3 Up 08:37:20 - 09:07:20 2802
PNWRO 08:52:15 -19.7 Dark Down 32.9 194.1 Up 08:37:15 - 09:07:15 2773
Goldendale 08:52:21 -20.2 Dark Down 33.3 191.9 Up 08:37:21 - 09:07:21 2769
The Dalles 08:52:22 -20.4 Dark Down 33.6 191.5 Up 08:37:22 - 09:07:22 2756
Maupin 08:52:22 -20.8 Dark Down 34.0 191.7 Up 08:37:22 - 09:07:22 2729
Sisters 08:52:23 -21.8 Dark Down 34.9 191.2 Up 08:37:23 - 09:07:23 2674
Bend 08:52:22 -22.0 Dark Down 35.1 191.6 Up 08:37:22 - 09:07:22 2658
Oregon Observatory 08:52:22 -22.1 Dark Down 35.3 191.4 Up 08:37:22 - 09:07:22 2647
North Lake 08:52:20 -22.7 Dark Down 35.9 192.2 Up 08:37:20 - 09:07:20 2603
Chiloquin 08:52:23 -23.5 Dark Down 36.7 191.1 Up 08:37:23 - 09:07:23 2561
Klamath Falls 08:52:23 -23.8 Dark Down 37.0 191.3 Up 08:37:23 - 09:07:23 2537
Lakeview 08:52:18 -23.7 Dark Down 36.8 193.0 Up 08:37:18 - 09:07:18 2530
Cedarville 08:52:17 -24.3 Dark Down 37.4 193.3 Up 08:37:17 - 09:07:17 2484
Fall River/Burney 08:52:21 -24.9 Dark Down 38.1 191.9 Up 08:37:21 - 09:07:21 2454
Susanville 08:52:18 -25.4 Dark Down 38.6 192.9 Up 08:37:18 - 09:07:18 2407
Greenville 08:52:19 -25.8 Dark Down 38.9 192.6 Up 08:37:19 - 09:07:19 2389
Gimple 08:52:19 -25.7 Dark Down 38.9 192.7 Up 08:37:19 - 09:07:19 2388
Quincy 08:52:19 -26.0 Dark Down 39.1 192.6 Up 08:37:19 - 09:07:19 2374
Portola 08:52:17 -26.0 Dark Down 39.2 193.3 Up 08:37:17 - 09:07:17 2363
Reno 08:52:15 -26.2 Dark Down 39.3 194.1 Up 08:37:15 - 09:07:15 2342
Carson City 08:52:15 -26.5 Dark Down 39.6 194.2 Up 08:37:15 - 09:07:15 2316
Dunrhomin 08:51:26 -21.8 Dark Down 34.4 210.9 Up 08:36:26 - 09:06:26 2309
Yerington 08:52:12 -26.6 Dark Down 39.7 195.0 Up 08:37:12 - 09:07:12 2299
Gardnerville 08:52:14 -26.7 Dark Down 39.9 194.3 Up 08:37:14 - 09:07:14 2298
CU-SBO 08:51:27 -22.0 Dark Down 34.6 210.9 Up 08:36:27 - 09:06:27 2292
Hawthorne 08:52:10 -26.9 Dark Down 40.0 195.8 Up 08:37:10 - 09:07:10 2262
Lee Vining 08:52:11 -27.6 Dark Down 40.7 195.3 Up 08:37:11 - 09:07:11 2223
Tonopah 08:52:05 -27.1 Dark Down 40.2 197.6 Up 08:37:05 - 09:07:05 2221
Bishop 08:52:09 -28.0 Dark Down 41.1 196.4 Up 08:37:09 - 09:07:09 2174
Beatty 08:52:03 -28.1 Dark Down 41.2 198.5 Up 08:37:03 - 09:07:03 2131
Indian Springs 08:51:59 -28.2 Dark Down 41.2 200.0 Up 08:36:59 - 09:06:59 2101
Henderson 08:51:55 -28.5 Dark Down 41.5 201.0 Up 08:36:55 - 09:06:55 2055
Patrick 08:51:51 -28.9 Dark Down 41.8 202.6 Up 08:36:51 - 09:06:51 2000
Laughlin/Bullhead City 08:51:54 -29.3 Dark Down 42.2 201.8 Up 08:36:54 - 09:06:54 1985
Kingman/Dolan Springs 08:51:52 -29.1 Dark Down 42.0 202.4 Up 08:36:52 - 09:06:52 1984
Mohave Valley 08:51:53 -29.5 Dark Down 42.4 201.9 Up 08:36:53 - 09:06:53 1963
Lake Havasu City 08:51:52 -29.8 Dark Down 42.7 202.3 Up 08:36:52 - 09:06:52 1930
Wildwood 08:52:08 -31.2 Dark Down 44.3 196.9 Up 08:37:08 - 09:07:08 1920
Parker 08:51:52 -30.2 Dark Down 43.1 202.5 Up 08:36:52 - 09:06:52 1902
Idyllwild 08:52:01 -31.2 Dark Down 44.2 199.5 Up 08:37:01 - 09:07:01 1883
George/Scottsdale 08:51:43 -29.9 Dark Down 42.6 205.7 Up 08:36:43 - 09:06:43 1853
Calipatria 08:51:56 -31.5 Dark Down 44.4 201.3 Up 08:36:56 - 09:06:56 1826
Yuma 08:51:52 -31.6 Dark Down 44.5 202.6 Up 08:36:52 - 09:06:52 1786

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, (2028/06/28 08:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.19  77
Nunki          18:55:15.9 -26:17:49  2.0 16.77 110
PPM 234743     18:35:02.5 -10:58:38  5.0  0.96 107
PPM 234733     18:34:36.6 -10:31:52  8.4  0.66 107
PPM 234752     18:35:23.4 -10:09:08  9.0  0.33 107
04HX78         18:36:42.3 -10:06:42 14.9       108
Positions are for J2000

Event circumstances last updated at 2022/05/26 23:39:11 UT

Marc W. Buie, Southwest Research Institute

RECON