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 03:35:38 UTC

J2000 position of star is 05:20:00.8 +23:28:43
Equinox of date position of star is 05:21:11.7 +23:29:50
Stellar brightness G=15.8, use SENSEUP=128
Star is 151 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=23.7

[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 1113 seconds.
The 1-sigma cross-track error in the shadow position is 4101 km.
The sky-plane scale is 25972.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.2 km assuming a 5% albedo -- 6.0 sec chord
Diameter=58.5 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 04VK78, (2024/12/27 03:36UT)
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 +22:07:13  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 0.8 sigma about the mid-time.
The median site spacing is 20.0 km RECON observability=1.0 and success probability=8.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 03:37:39 -33.4 Dark Down 43.9 106.5 Up 03:22:39 - 03:52:39 5285
Summerland 03:37:40 -33.2 Dark Down 43.8 106.0 Up 03:22:40 - 03:52:40 5267
Penticton 03:37:40 -33.3 Dark Down 43.9 106.0 Up 03:22:40 - 03:52:40 5259
Okanagan Falls 03:37:41 -33.3 Dark Down 43.9 105.8 Up 03:22:41 - 03:52:41 5244
Oliver 03:37:42 -33.3 Dark Down 44.0 105.7 Up 03:22:42 - 03:52:42 5229
Anarchist Mountain Observatory 03:37:42 -33.5 Dark Down 44.2 105.7 Up 03:22:42 - 03:52:42 5210
Oroville 03:37:41 -33.4 Dark Down 44.1 105.6 Up 03:22:41 - 03:52:41 5205
Tonasket 03:37:43 -33.4 Dark Down 44.2 105.4 Up 03:22:43 - 03:52:43 5186
Okanogan 03:37:44 -33.3 Dark Down 44.2 104.9 Up 03:22:44 - 03:52:44 5161
Brewster 03:37:45 -33.2 Dark Down 44.2 104.5 Up 03:22:45 - 03:52:45 5143
Manson/Chelan 03:37:46 -33.0 Dark Down 44.0 104.0 Up 03:22:46 - 03:52:46 5134
Entiat 03:37:47 -32.9 Dark Down 44.0 103.7 Up 03:22:47 - 03:52:47 5117
Wenatchee 03:37:48 -32.9 Dark Down 44.0 103.4 Up 03:22:48 - 03:52:48 5098
Ellensburg 03:37:50 -32.7 Dark Down 43.9 102.8 Up 03:22:50 - 03:52:50 5068
Yakima 03:37:51 -32.7 Dark Down 44.0 102.4 Up 03:22:51 - 03:52:51 5033
Toppenish/White Swan 03:37:51 -32.8 Dark Down 44.2 102.4 Up 03:22:51 - 03:52:51 5010
Goldendale 03:37:53 -32.5 Dark Down 44.0 101.5 Up 03:22:53 - 03:52:53 4973
Pasco 03:37:48 -33.7 Dark Down 45.0 103.3 Up 03:22:48 - 03:52:48 4966
The Dalles 03:37:55 -32.3 Dark Down 43.8 101.0 Up 03:22:55 - 03:52:55 4963
George/Umatilla 03:37:50 -33.6 Dark Down 45.0 102.8 Up 03:22:50 - 03:52:50 4942
PNWRO 03:37:49 -33.9 Dark Down 45.3 103.3 Up 03:22:49 - 03:52:49 4938
Maupin 03:37:56 -32.3 Dark Down 43.9 100.7 Up 03:22:56 - 03:52:56 4923
Madras/Culver 03:37:57 -32.3 Dark Down 44.0 100.1 Up 03:22:57 - 03:52:57 4876
Sisters 03:37:59 -32.0 Dark Down 43.8 99.4 Up 03:22:59 - 03:52:59 4859
Redmond 03:37:59 -32.3 Dark Down 44.1 99.7 Up 03:22:59 - 03:52:59 4846
Bend 03:37:59 -32.1 Dark Down 44.0 99.4 Up 03:22:59 - 03:52:59 4831
Oregon Observatory 03:38:00 -32.0 Dark Down 43.9 99.1 Up 03:23:00 - 03:53:00 4819
La Pine/Gilchrist 03:38:01 -32.0 Dark Down 43.9 98.9 Up 03:23:01 - 03:53:01 4802
North Lake 03:38:01 -32.4 Dark Down 44.4 99.0 Up 03:23:01 - 03:53:01 4747
Chiloquin 03:38:04 -31.7 Dark Down 43.8 97.6 Up 03:23:04 - 03:53:04 4713
Paisley 03:38:01 -32.6 Dark Down 44.8 98.7 Up 03:23:01 - 03:53:01 4687
Klamath Falls 03:38:05 -31.7 Dark Down 43.9 97.3 Up 03:23:05 - 03:53:05 4680
Tulelake 03:38:05 -31.9 Dark Down 44.2 97.3 Up 03:23:05 - 03:53:05 4646
Lakeview 03:38:02 -32.8 Dark Down 45.0 98.4 Up 03:23:02 - 03:53:02 4635
Cedarville 03:38:03 -32.9 Dark Down 45.2 97.9 Up 03:23:03 - 03:53:03 4570
Fall River/Burney 03:38:07 -31.9 Dark Down 44.4 96.5 Up 03:23:07 - 03:53:07 4561
Susanville 03:38:07 -32.4 Dark Down 45.0 96.4 Up 03:23:07 - 03:53:07 4481
Greenville 03:38:09 -32.2 Dark Down 44.8 95.9 Up 03:23:09 - 03:53:09 4465
Gimple 03:38:08 -32.3 Dark Down 44.9 96.0 Up 03:23:08 - 03:53:08 4462
Quincy 03:38:09 -32.2 Dark Down 44.8 95.7 Up 03:23:09 - 03:53:09 4446
Portola 03:38:09 -32.5 Dark Down 45.2 95.9 Up 03:23:09 - 03:53:09 4420
Reno 03:38:08 -33.0 Dark Down 45.7 96.1 Up 03:23:08 - 03:53:08 4376
Carson City 03:38:09 -33.0 Dark Down 45.8 95.8 Up 03:23:09 - 03:53:09 4342
Gardnerville 03:38:09 -33.0 Dark Down 45.9 95.6 Up 03:23:09 - 03:53:09 4317
Yerington 03:38:08 -33.5 Dark Down 46.3 96.0 Up 03:23:08 - 03:53:08 4305
Hawthorne 03:38:07 -33.9 Dark Down 46.8 95.9 Up 03:23:07 - 03:53:07 4245
Lee Vining 03:38:10 -33.4 Dark Down 46.4 95.0 Up 03:23:10 - 03:53:10 4206
Tonopah 03:38:05 -34.9 Dark Down 47.9 96.4 Up 03:23:05 - 03:53:05 4159
Bishop 03:38:09 -34.0 Dark Down 47.1 94.9 Up 03:23:09 - 03:53:09 4128
Lone Pine 03:38:11 -34.2 Dark Down 47.4 94.3 Up 03:23:11 - 03:53:11 4045
Niwot 03:37:29 -44.1 Dark Down 56.5 109.1 Up 03:22:29 - 03:52:29 4041
Beatty 03:38:07 -35.2 Dark Down 48.4 95.5 Up 03:23:07 - 03:53:07 4035
SwRI 03:37:30 -44.1 Dark Down 56.4 108.9 Up 03:22:30 - 03:52:30 4033
CPSLO 03:38:19 -32.0 Dark Down 45.4 91.3 Up 03:23:19 - 03:53:19 3999
Indian Springs 03:38:05 -36.0 Dark Down 49.3 95.8 Up 03:23:05 - 03:53:05 3972
Henderson 03:38:04 -36.6 Dark Down 49.9 95.7 Up 03:23:04 - 03:53:04 3899
Searchlight/Boulder City 03:38:05 -36.6 Dark Down 50.0 95.0 Up 03:23:05 - 03:53:05 3841
Wildwood 03:38:17 -33.5 Dark Down 47.1 91.2 Up 03:23:17 - 03:53:17 3817
Patrick 03:38:02 -37.4 Dark Down 50.8 95.7 Up 03:23:02 - 03:53:02 3805
Laughlin/Bullhead City 03:38:05 -36.8 Dark Down 50.3 94.9 Up 03:23:05 - 03:53:05 3802
Kingman/Dolan Springs 03:38:03 -37.3 Dark Down 50.7 95.3 Up 03:23:03 - 03:53:03 3789
Mohave Valley 03:38:05 -36.8 Dark Down 50.3 94.6 Up 03:23:05 - 03:53:05 3775
DCO 03:38:01 -38.0 Dark Down 51.5 95.8 Up 03:23:01 - 03:53:01 3755
Lake Havasu City 03:38:05 -37.0 Dark Down 50.6 94.3 Up 03:23:05 - 03:53:05 3728
Idyllwild 03:38:13 -35.0 Dark Down 48.7 91.9 Up 03:23:13 - 03:53:13 3724
Parker 03:38:06 -37.0 Dark Down 50.6 93.9 Up 03:23:06 - 03:53:06 3692
Blythe 03:38:08 -36.7 Dark Down 50.4 93.0 Up 03:23:08 - 03:53:08 3649
Calipatria 03:38:12 -35.9 Dark Down 49.7 91.9 Up 03:23:12 - 03:53:12 3627
Yuma 03:38:10 -36.6 Dark Down 50.4 91.9 Up 03:23:10 - 03:53:10 3557

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 03:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 12.48 160
Alnath         05:26:17.5 +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 2019/06/08 09:47:10 UT

Marc W. Buie, Southwest Research Institute

RECON