RECON: TNO occultation with 04VK78

Event between 04VK78 and star GA1120:01107665 with event index number of 1364423

Geocentric closest approach at 2024/12/27 03:43:32 UTC

J2000 position of star is 05:20:00.8 +23:28:43
Equinox of date position of star is 05:21:22.0 +23:30:00
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 151 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 36.8 AU from the Sun and 35.8 AU from the Earth.
The TNO is moving 24.0 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 352 seconds.
The 1-sigma cross-track error in the shadow position is 1637 km.
The sky-plane scale is 25972.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=161.4 km assuming a 5% albedo -- 6.7 sec chord
Diameter=65.9 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 04VK78, (2024/12/27 03:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.4 +16:33:28  0.8 12.48 160
Alnath         05:27:52.4 +28:37:35  1.6  5.32 149
109 Tau        05:20:46.8 +22:07:12  4.9  1.39 151
PPM 094241     05:19:03.2 +24:02:04  7.9  0.78 151
PPM 094266     05:21:04.5 +23:26:55 10.4  0.12 151
04VK78         05:21:31.9 +23:30:09 15.8       150
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 2.6 sigma about the mid-time.
The median site spacing is 25.4 km RECON observability=1.0 and success probability=16.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:45:29 -34.0 Dark Down 44.3 108.2 Up 03:30:29 - 04:00:29 3570
Kelowna 03:45:30 -34.6 Dark Down 45.1 108.3 Up 03:30:30 - 04:00:30 3480
Peachland 03:45:31 -34.4 Dark Down 44.9 107.9 Up 03:30:31 - 04:00:31 3478
Victoria 03:45:41 -32.1 Dark Down 43.0 103.4 Up 03:30:41 - 04:00:41 3464
Summerland 03:45:31 -34.5 Dark Down 45.0 107.9 Up 03:30:31 - 04:00:31 3463
Penticton 03:45:31 -34.6 Dark Down 45.1 107.9 Up 03:30:31 - 04:00:31 3454
Oliver 03:45:32 -34.6 Dark Down 45.2 107.6 Up 03:30:32 - 04:00:32 3424
Anarchist Mountain Observatory 03:45:32 -34.7 Dark Down 45.4 107.6 Up 03:30:32 - 04:00:32 3405
Sleaford 03:44:55 -42.5 Dark Down 51.6 125.2 Up 03:29:55 - 03:59:55 3384
Tonasket 03:45:33 -34.7 Dark Down 45.5 107.2 Up 03:30:33 - 04:00:33 3380
Okanogan 03:45:34 -34.6 Dark Down 45.5 106.8 Up 03:30:34 - 04:00:34 3355
Brewster 03:45:36 -34.5 Dark Down 45.4 106.3 Up 03:30:36 - 04:00:36 3336
Manson/Chelan 03:45:36 -34.3 Dark Down 45.2 105.8 Up 03:30:36 - 04:00:36 3327
Wenatchee 03:45:38 -34.2 Dark Down 45.3 105.2 Up 03:30:38 - 04:00:38 3290
Ellensburg 03:45:40 -34.1 Dark Down 45.2 104.6 Up 03:30:40 - 04:00:40 3260
Yakima 03:45:41 -34.1 Dark Down 45.3 104.1 Up 03:30:41 - 04:00:41 3225
Toppenish/White Swan 03:45:41 -34.2 Dark Down 45.5 104.1 Up 03:30:41 - 04:00:41 3201
Goldendale 03:45:44 -33.9 Dark Down 45.3 103.2 Up 03:30:44 - 04:00:44 3164
The Dalles 03:45:45 -33.6 Dark Down 45.1 102.6 Up 03:30:45 - 04:00:45 3153
PNWRO 03:45:39 -35.2 Dark Down 46.6 105.1 Up 03:30:39 - 04:00:39 3130
Maupin 03:45:46 -33.7 Dark Down 45.3 102.3 Up 03:30:46 - 04:00:46 3114
Sisters 03:45:49 -33.4 Dark Down 45.1 101.0 Up 03:30:49 - 04:00:49 3049
Bend 03:45:50 -33.6 Dark Down 45.4 101.0 Up 03:30:50 - 04:00:50 3020
Oregon Observatory 03:45:50 -33.5 Dark Down 45.3 100.7 Up 03:30:50 - 04:00:50 3008
North Lake 03:45:51 -33.8 Dark Down 45.8 100.6 Up 03:30:51 - 04:00:51 2936
Chiloquin 03:45:54 -33.1 Dark Down 45.3 99.1 Up 03:30:54 - 04:00:54 2901
Klamath Falls 03:45:55 -33.2 Dark Down 45.4 98.8 Up 03:30:55 - 04:00:55 2867
Lakeview 03:45:52 -34.2 Dark Down 46.4 99.9 Up 03:30:52 - 04:00:52 2824
Cedarville 03:45:53 -34.3 Dark Down 46.7 99.4 Up 03:30:53 - 04:00:53 2758
Fall River/Burney 03:45:57 -33.4 Dark Down 45.8 98.0 Up 03:30:57 - 04:00:57 2748
Susanville 03:45:57 -33.9 Dark Down 46.5 97.9 Up 03:30:57 - 04:00:57 2668
Greenville 03:45:59 -33.7 Dark Down 46.3 97.4 Up 03:30:59 - 04:00:59 2651
Gimple 03:45:59 -33.8 Dark Down 46.4 97.4 Up 03:30:59 - 04:00:59 2648
Quincy 03:45:59 -33.7 Dark Down 46.3 97.2 Up 03:30:59 - 04:00:59 2632
Portola 03:45:58 -34.0 Dark Down 46.7 97.4 Up 03:30:58 - 04:00:58 2606
Reno 03:45:58 -34.5 Dark Down 47.2 97.6 Up 03:30:58 - 04:00:58 2563
Carson City 03:45:58 -34.5 Dark Down 47.3 97.2 Up 03:30:58 - 04:00:58 2528
Gardnerville 03:45:59 -34.5 Dark Down 47.4 97.0 Up 03:30:59 - 04:00:59 2504
Yerington 03:45:57 -35.0 Dark Down 47.8 97.5 Up 03:30:57 - 04:00:57 2491
Hawthorne 03:45:57 -35.4 Dark Down 48.3 97.3 Up 03:30:57 - 04:00:57 2432
Lee Vining 03:46:00 -35.0 Dark Down 48.0 96.4 Up 03:31:00 - 04:01:00 2392
Tonopah 03:45:55 -36.5 Dark Down 49.4 97.8 Up 03:30:55 - 04:00:55 2347
Bishop 03:45:59 -35.5 Dark Down 48.6 96.2 Up 03:30:59 - 04:00:59 2313
Dunrhomin 03:45:18 -45.6 Dark Down 57.8 111.4 Up 03:30:18 - 04:00:18 2253
CU-SBO 03:45:18 -45.6 Dark Down 57.8 111.0 Up 03:30:18 - 04:00:18 2231
Beatty 03:45:56 -36.8 Dark Down 49.9 96.8 Up 03:30:56 - 04:00:56 2221
Indian Springs 03:45:54 -37.6 Dark Down 50.8 97.2 Up 03:30:54 - 04:00:54 2159
Henderson 03:45:53 -38.1 Dark Down 51.5 97.0 Up 03:30:53 - 04:00:53 2086
Wildwood 03:46:07 -35.1 Dark Down 48.7 92.4 Up 03:31:07 - 04:01:07 2000
Patrick 03:45:51 -39.0 Dark Down 52.4 97.0 Up 03:30:51 - 04:00:51 1993
Laughlin/Bullhead City 03:45:54 -38.4 Dark Down 51.9 96.2 Up 03:30:54 - 04:00:54 1988
Kingman/Dolan Springs 03:45:52 -38.9 Dark Down 52.3 96.6 Up 03:30:52 - 04:00:52 1976
Mohave Valley 03:45:54 -38.4 Dark Down 51.9 95.9 Up 03:30:54 - 04:00:54 1961
Lake Havasu City 03:45:55 -38.6 Dark Down 52.2 95.6 Up 03:30:55 - 04:00:55 1914
Idyllwild 03:46:03 -36.6 Dark Down 50.3 93.1 Up 03:31:03 - 04:01:03 1908
Parker 03:45:55 -38.6 Dark Down 52.2 95.1 Up 03:30:55 - 04:00:55 1878
Calipatria 03:46:01 -37.5 Dark Down 51.3 93.1 Up 03:31:01 - 04:01:01 1812
George/Scottsdale 03:45:49 -40.6 Dark Down 54.3 96.2 Up 03:30:49 - 04:00:49 1766
Yuma 03:45:59 -38.2 Dark Down 52.1 93.1 Up 03:30:59 - 04:00:59 1742

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 04VK78, (2024/12/27 03:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.48 160
Alnath         05:26:17.6 +28:36:23  1.6  5.32 149
109 Tau        05:19:16.6 +22:05:46  4.9  1.39 151
PPM 094241     05:17:31.7 +24:00:34  7.9  0.78 151
PPM 094266     05:19:33.4 +23:25:29 10.4  0.12 151
04VK78         05:20:00.8 +23:28:43 15.8       151
Positions are for J2000

Event circumstances last updated at 2022/04/03 23:25:47 UT

Marc W. Buie, Southwest Research Institute

RECON