RECON: TNO occultation with 04VK78

Event between 04VK78 and star GA1120:01364664 with event index number of 1626105

Geocentric closest approach at 2026/10/29 08:59:20 UTC

J2000 position of star is 05:40:33.5 +23:47:50
Equinox of date position of star is 05:41:57.6 +23:48:28
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 7 degrees from the moon. Moon is 86% illuminated.
Apparent brightness V=23.7

[RECON map]
Object is 37.3 AU from the Sun and 36.6 AU from the Earth.
Apparent velocity is 14.4 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 596 seconds.
The 1-sigma cross-track error in the shadow position is 2586 km.
The sky-plane scale is 26571.4 km/arcsec.

The object has an absolute magnitude Hv=7.9
Diameter=161.4 km assuming a 5% albedo -- 11.0 sec chord
Diameter=65.9 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 04VK78, (2026/10/29 09:12UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.5 +07:24:35  0.4 16.76  23
Alnath         05:27:59.4 +28:37:40  1.6  5.78   3
PPM 094690     05:43:32.7 +23:20:15  6.5  0.56   8
PPM 094629     05:41:30.1 +24:14:18  7.4  0.46   7
PPM 094632     05:41:32.7 +23:42:30  9.0  0.18   7
04VK78         05:42:11.7 +23:48:34 14.5         8
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 35.8 km RECON observability=1.0 and success probability=9.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 09:01:50 -49.7 Dark Up 53.3 125.0 Up 08:46:50 - 09:16:50 -3800
Sleaford 09:00:44 -43.1 Dark Up 58.5 146.9 Up 08:45:44 - 09:15:44 -3848
Kelowna 09:01:48 -50.1 Dark Up 54.3 125.2 Up 08:46:48 - 09:16:48 -3891
Peachland 09:01:50 -50.3 Dark Up 54.2 124.7 Up 08:46:50 - 09:16:50 -3897
Summerland 09:01:49 -50.4 Dark Up 54.3 124.6 Up 08:46:49 - 09:16:49 -3912
Penticton 09:01:50 -50.4 Dark Up 54.4 124.7 Up 08:46:50 - 09:16:50 -3920
Victoria 09:02:09 -52.5 Dark Up 52.8 118.9 Up 08:47:09 - 09:17:09 -3952
Oliver 09:01:51 -50.7 Dark Up 54.6 124.3 Up 08:46:51 - 09:16:51 -3954
Anarchist Mountain Observatory 09:01:51 -50.8 Dark Up 54.8 124.4 Up 08:46:51 - 09:16:51 -3973
Okanogan 09:01:54 -51.4 Dark Up 55.1 123.3 Up 08:46:54 - 09:16:54 -4031
Brewster 09:01:55 -51.7 Dark Up 55.1 122.8 Up 08:46:55 - 09:16:55 -4054
Manson/Chelan 09:01:57 -52.0 Dark Up 55.0 122.1 Up 08:46:57 - 09:16:57 -4068
Wenatchee 09:02:00 -52.5 Dark Up 55.2 121.3 Up 08:47:00 - 09:17:00 -4111
Ellensburg 09:02:02 -52.9 Dark Up 55.2 120.5 Up 08:47:02 - 09:17:02 -4147
Yakima 09:02:03 -53.3 Dark Up 55.4 120.0 Up 08:47:03 - 09:17:03 -4186
Toppenish/White Swan 09:02:03 -53.4 Dark Up 55.7 119.9 Up 08:47:03 - 09:17:03 -4210
PNWRO 09:01:58 -53.1 Dark Up 56.7 121.3 Up 08:46:58 - 09:16:58 -4271
The Dalles 09:02:09 -54.3 Dark Up 55.6 118.0 Up 08:47:09 - 09:17:09 -4272
Maupin 09:02:10 -54.6 Dark Up 55.8 117.6 Up 08:47:10 - 09:17:10 -4315
Sisters 09:02:14 -55.6 Dark Up 55.9 115.9 Up 08:47:14 - 09:17:14 -4392
Bend 09:02:14 -55.7 Dark Up 56.2 115.8 Up 08:47:14 - 09:17:14 -4421
Oregon Observatory 09:02:15 -55.9 Dark Up 56.2 115.5 Up 08:47:15 - 09:17:15 -4435
Chiloquin 09:02:20 -57.1 Dark Up 56.5 113.2 Up 08:47:20 - 09:17:20 -4558
Klamath Falls 09:02:21 -57.4 Dark Up 56.7 112.8 Up 08:47:21 - 09:17:21 -4594
Cedarville 09:02:15 -57.3 Dark Up 58.0 113.6 Up 08:47:15 - 09:17:15 -4694
Fall River/Burney 09:02:23 -58.2 Dark Up 57.4 111.6 Up 08:47:23 - 09:17:23 -4720
Greenville 09:02:23 -58.7 Dark Up 58.0 110.7 Up 08:47:23 - 09:17:23 -4821
Gimple 09:02:22 -58.7 Dark Up 58.1 110.8 Up 08:47:22 - 09:17:22 -4822
Quincy 09:02:23 -58.9 Dark Up 58.1 110.4 Up 08:47:23 - 09:17:23 -4841
Portola 09:02:22 -58.8 Dark Up 58.5 110.7 Up 08:47:22 - 09:17:22 -4863
Reno 09:02:19 -58.7 Dark Up 59.0 111.0 Up 08:47:19 - 09:17:19 -4903
Carson City 09:02:20 -58.9 Dark Up 59.2 110.5 Up 08:47:20 - 09:17:20 -4940
Gardnerville 09:02:20 -59.1 Dark Up 59.3 110.2 Up 08:47:20 - 09:17:20 -4966
Yerington 09:02:17 -58.8 Dark Up 59.7 110.9 Up 08:47:17 - 09:17:17 -4972
Hawthorne 09:02:16 -58.8 Dark Up 60.2 110.7 Up 08:47:16 - 09:17:16 -5029
Dunrhomin 09:01:01 -49.9 Dark Up 68.0 133.2 Up 08:46:01 - 09:16:01 -5048
Nikitin 09:01:02 -50.0 Dark Up 68.1 132.9 Up 08:46:02 - 09:16:02 -5067
CU-SBO 09:01:02 -50.1 Dark Up 68.1 132.6 Up 08:46:02 - 09:16:02 -5073
Lee Vining 09:02:20 -59.5 Dark Up 60.1 109.3 Up 08:47:20 - 09:17:20 -5079
Bishop 09:02:18 -59.5 Dark Up 60.8 109.0 Up 08:47:18 - 09:17:18 -5154
Beatty 09:02:10 -59.0 Dark Up 62.2 110.0 Up 08:47:10 - 09:17:10 -5232
Patrick 09:01:58 -58.1 Dark Up 64.8 110.4 Up 08:46:58 - 09:16:58 -5439
Laughlin/Bullhead City 09:02:02 -58.7 Dark Up 64.4 109.2 Up 08:47:02 - 09:17:02 -5453
Wildwood 09:02:26 -61.9 Dark Up 61.6 103.1 Up 08:47:26 - 09:17:26 -5493
Lake Havasu City 09:02:02 -59.0 Dark Up 64.8 108.1 Up 08:47:02 - 09:17:02 -5529
Idyllwild 09:02:16 -61.0 Dark Up 63.2 104.2 Up 08:47:16 - 09:17:16 -5567
George/Scottsdale 09:01:50 -57.8 Dark Up 67.0 109.2 Up 08:46:50 - 09:16:50 -5652
Calipatria 09:02:11 -60.6 Dark Up 64.3 104.1 Up 08:47:11 - 09:17:11 -5653
Yuma 09:02:07 -60.2 Dark Up 65.1 104.1 Up 08:47:07 - 09:17:07 -5715

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, (2026/10/29 09:12UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 16.76  23
Alnath         05:26:17.6 +28:36:23  1.6  5.78   3
PPM 094690     05:41:54.8 +23:19:34  6.5  0.56   8
PPM 094629     05:39:51.5 +24:13:32  7.4  0.46   7
PPM 094632     05:39:54.5 +23:41:45  9.0  0.18   7
04VK78         05:40:33.5 +23:47:50 14.5         7
Positions are for J2000

Event circumstances last updated at 2022/12/25 03:50:50 UT

Marc W. Buie, Southwest Research Institute

RECON