RECON: TNO occultation with 04HX78

Event between 04HX78 and star GA0780:12788524 with event index number of 2012500

Geocentric closest approach at 2028/06/05 07:57:39 UTC

J2000 position of star is 18:38:51.6 -10:08:05
Equinox of date position of star is 18:40:05.8 -10:06:48
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 52 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 34.1 AU from the Sun and 33.2 AU from the Earth.
The TNO is moving 21.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 605 seconds.
The 1-sigma cross-track error in the shadow position is 3522 km.
The sky-plane scale is 24057.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=159.2 km assuming a 5% albedo -- 7.4 sec chord
Diameter=65.0 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2028/06/05 07:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.3 -26:29:33  0.9 34.62  19
Nunki          18:57:01.6 -26:15:31  2.0 16.62  51
PPM 234743     18:36:37.2 -10:57:09  5.0  1.26  50
PPM 234894     18:43:01.4 -10:22:03  8.5  0.69  52
PPM 234827     18:40:04.4 -09:58:40  9.1  0.16  52
04HX78         18:40:25.7 -10:06:27 15.5        52
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 1.5 sigma about the mid-time.
The median site spacing is 20.3 km RECON observability=1.0 and success probability=4.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:58:43 -14.3 AT Up 27.0 167.1 Low 07:43:43 - 08:13:43 7538
Kamloops 07:59:27 -16.7 AT Up 25.1 151.6 Low 07:44:27 - 08:14:27 7302
Kelowna 07:59:26 -17.5 AT Up 26.1 152.3 Low 07:44:26 - 08:14:26 7264
Peachland 07:59:27 -17.6 AT Up 26.1 152.0 Low 07:44:27 - 08:14:27 7254
Summerland 07:59:27 -17.8 AT Up 26.3 152.1 Low 07:44:27 - 08:14:27 7246
Penticton 07:59:27 -17.9 AT Up 26.4 152.2 Low 07:44:27 - 08:14:27 7243
Oliver 07:59:27 -18.2 Dark Up 26.7 152.1 Low 07:44:27 - 08:14:27 7222
Anarchist Mountain Observatory 07:59:28 -18.4 Dark Up 26.9 152.3 Low 07:44:28 - 08:14:28 7214
Tonasket 07:59:28 -18.7 Dark Up 27.2 152.1 Low 07:44:28 - 08:14:28 7193
Okanogan 07:59:29 -19.0 Dark Up 27.4 151.9 Low 07:44:29 - 08:14:29 7170
Brewster 07:59:30 -19.3 Dark Up 27.6 151.6 Low 07:44:30 - 08:14:30 7151
Manson/Chelan 07:59:31 -19.5 Dark Up 27.7 151.2 Low 07:44:31 - 08:14:31 7133
Victoria 07:59:40 -18.8 Dark Up 26.0 148.0 Low 07:44:40 - 08:14:40 7132
Wenatchee 07:59:32 -20.0 Dark Up 28.0 150.9 Low 07:44:32 - 08:14:32 7100
Ellensburg 07:59:34 -20.4 Dark Up 28.3 150.5 Low 07:44:34 - 08:14:34 7071
Yakima 07:59:34 -20.8 Dark Up 28.7 150.4 Low 07:44:34 - 08:14:34 7044
Toppenish/White Swan 07:59:34 -21.0 Dark Up 28.9 150.5 Low 07:44:34 - 08:14:34 7032
PNWRO 07:59:30 -21.4 Dark Up 29.7 152.0 Low 07:44:30 - 08:14:30 7027
Goldendale 07:59:36 -21.6 Dark Up 29.2 149.9 Low 07:44:36 - 08:14:36 6989
The Dalles 07:59:37 -21.8 Dark Up 29.3 149.5 Low 07:44:37 - 08:14:37 6969
Maupin 07:59:38 -22.2 Dark Up 29.7 149.5 Low 07:44:38 - 08:14:38 6942
Sisters 07:59:40 -23.1 Dark Up 30.3 148.7 Up 07:44:40 - 08:14:40 6875
Bend 07:59:40 -23.3 Dark Up 30.6 148.9 Up 07:44:40 - 08:14:40 6862
Oregon Observatory 07:59:41 -23.5 Dark Up 30.7 148.7 Up 07:44:41 - 08:14:41 6849
North Lake 07:59:39 -24.1 Dark Up 31.4 149.1 Up 07:44:39 - 08:14:39 6811
Dunrhomin 07:58:46 -25.6 Dark Up 38.6 166.2 Up 07:43:46 - 08:13:46 6798
CU-SBO 07:58:47 -25.9 Dark Up 38.8 166.0 Up 07:43:47 - 08:13:47 6779
Chiloquin 07:59:42 -24.8 Dark Up 31.7 147.9 Up 07:44:42 - 08:14:42 6749
Lakeview 07:59:39 -25.2 Dark Up 32.6 149.4 Up 07:44:39 - 08:14:39 6743
Klamath Falls 07:59:43 -25.1 Dark Up 32.0 147.9 Up 07:44:43 - 08:14:43 6725
Cedarville 07:59:39 -25.9 Dark Up 33.2 149.3 Up 07:44:39 - 08:14:39 6698
Fall River/Burney 07:59:43 -26.3 Dark Up 33.1 147.9 Up 07:44:43 - 08:14:43 6644
Susanville 07:59:42 -27.0 Dark Up 34.0 148.4 Up 07:44:42 - 08:14:42 6608
Gimple 07:59:43 -27.2 Dark Up 34.1 148.1 Up 07:44:43 - 08:14:43 6584
Greenville 07:59:42 -27.2 Dark Up 34.1 148.0 Up 07:44:42 - 08:14:42 6583
Quincy 07:59:43 -27.4 Dark Up 34.2 148.0 Up 07:44:43 - 08:14:43 6568
Portola 07:59:42 -27.6 Dark Up 34.5 148.4 Up 07:44:42 - 08:14:42 6565
Reno 07:59:40 -27.8 Dark Up 35.0 149.0 Up 07:44:40 - 08:14:40 6555
Carson City 07:59:41 -28.2 Dark Up 35.3 148.9 Up 07:44:41 - 08:14:41 6528
Yerington 07:59:38 -28.4 Dark Up 35.8 149.5 Up 07:44:38 - 08:14:38 6522
Gardnerville 07:59:41 -28.4 Dark Up 35.6 148.9 Up 07:44:41 - 08:14:41 6510
Hawthorne 07:59:36 -28.8 Dark Up 36.4 150.0 Up 07:44:36 - 08:14:36 6494
Tonopah 07:59:32 -29.3 Dark Up 37.3 151.4 Up 07:44:32 - 08:14:32 6479
Lee Vining 07:59:39 -29.4 Dark Up 36.7 149.2 Up 07:44:39 - 08:14:39 6443
Bishop 07:59:37 -30.0 Dark Up 37.5 149.8 Up 07:44:37 - 08:14:37 6407
Beatty 07:59:32 -30.4 Dark Up 38.5 151.5 Up 07:44:32 - 08:14:32 6394
Indian Springs 07:59:28 -30.7 Dark Up 39.2 152.6 Up 07:44:28 - 08:14:28 6384
Henderson 07:59:25 -31.1 Dark Up 39.9 153.2 Up 07:44:25 - 08:14:25 6351
Patrick 07:59:22 -31.7 Dark Up 40.9 154.3 Up 07:44:22 - 08:14:22 6317
Kingman/Dolan Springs 07:59:22 -31.9 Dark Up 41.0 154.0 Up 07:44:22 - 08:14:22 6296
Laughlin/Bullhead City 07:59:24 -32.0 Dark Up 40.8 153.3 Up 07:44:24 - 08:14:24 6287
Mohave Valley 07:59:24 -32.2 Dark Up 41.1 153.2 Up 07:44:24 - 08:14:24 6265
Lake Havasu City 07:59:24 -32.6 Dark Up 41.5 153.4 Up 07:44:24 - 08:14:24 6236
George/Scottsdale 07:59:15 -33.1 Dark Up 43.1 156.1 Up 07:44:15 - 08:14:15 6208
Parker 07:59:23 -33.0 Dark Up 41.9 153.3 Up 07:44:23 - 08:14:23 6207
Wildwood 07:59:40 -33.3 Dark Up 40.2 148.2 Up 07:44:40 - 08:14:40 6140
Idyllwild 07:59:33 -33.6 Dark Up 41.3 150.2 Up 07:44:33 - 08:14:33 6139
Calipatria 07:59:29 -34.1 Dark Up 42.3 151.4 Up 07:44:29 - 08:14:29 6105
Yuma 07:59:26 -34.4 Dark Up 43.0 152.3 Up 07:44:26 - 08:14:26 6082

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, (2028/06/05 07:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.62  19
Nunki          18:55:15.9 -26:17:49  2.0 16.62  51
PPM 234743     18:35:02.5 -10:58:38  5.0  1.26  50
PPM 234894     18:41:27.1 -10:23:47  8.5  0.69  52
PPM 234827     18:38:30.4 -10:00:17  9.1  0.16  52
04HX78         18:38:51.6 -10:08:05 15.5        52
Positions are for J2000

Event circumstances last updated at 2022/05/25 23:41:02 UT

Marc W. Buie, Southwest Research Institute

RECON