RECON: TNO occultation with 612891

Event between (612891) 04TT357 and star GA1060:01842704 with event index number of 2804879

Geocentric closest approach at 2029/01/10 06:14:59 UTC

J2000 position of star is 06:17:23.6 +16:51:10
Equinox of date position of star is 06:18:41.6 +16:50:34
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 140 degrees from the moon. Moon is 21% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 35.4 AU from the Sun and 34.5 AU from the Earth.
The TNO is moving 23.6 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 552 seconds.
The 1-sigma cross-track error in the shadow position is 2251 km.
The sky-plane scale is 25010.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 6.7 sec chord
Diameter=64.4 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 612891, (2029/01/10 06:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:44.6 +07:24:36  0.4 10.89 141
Alhena         06:39:23.3 +16:22:19  1.9  4.89 135
PPM 122270     06:20:43.1 +17:18:40  6.1  0.61 140
PPM 122244     06:19:47.3 +17:06:41  8.1  0.32 140
PPM 122235     06:19:20.7 +16:52:17  9.4  0.07 140
612891         06:19:04.6 +16:50:23 16.8       139
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 1.6 sigma about the mid-time.
The median site spacing is 29.4 km RECON observability=1.0 and success probability=2.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:14:56 -57.9 Dark Down 54.7 185.8 Up 05:59:56 - 06:29:56 7622
Kamloops 06:15:39 -53.7 Dark Down 55.1 161.8 Up 06:00:39 - 06:30:39 7467
Kelowna 06:15:36 -54.7 Dark Down 56.0 162.9 Up 06:00:36 - 06:30:36 7391
Peachland 06:15:38 -54.6 Dark Down 56.1 162.4 Up 06:00:38 - 06:30:38 7381
Summerland 06:15:37 -54.8 Dark Down 56.3 162.5 Up 06:00:37 - 06:30:37 7367
Penticton 06:15:37 -54.9 Dark Down 56.3 162.7 Up 06:00:37 - 06:30:37 7361
Oliver 06:15:37 -55.1 Dark Down 56.7 162.5 Up 06:00:37 - 06:30:37 7327
Anarchist Mountain Observatory 06:15:36 -55.3 Dark Down 56.9 162.7 Up 06:00:36 - 06:30:36 7311
Tonasket 06:15:37 -55.5 Dark Down 57.2 162.5 Up 06:00:37 - 06:30:37 7282
Victoria 06:15:49 -53.5 Dark Down 56.4 155.7 Up 06:00:49 - 06:30:49 7269
Okanogan 06:15:37 -55.6 Dark Down 57.5 162.1 Up 06:00:37 - 06:30:37 7250
Brewster 06:15:38 -55.7 Dark Down 57.7 161.6 Up 06:00:38 - 06:30:38 7224
Manson/Chelan 06:15:40 -55.6 Dark Down 57.8 160.8 Up 06:00:40 - 06:30:40 7205
Wenatchee 06:15:41 -55.8 Dark Down 58.2 160.3 Up 06:00:41 - 06:30:41 7160
Ellensburg 06:15:41 -56.0 Dark Down 58.5 159.7 Up 06:00:41 - 06:30:41 7120
Yakima 06:15:42 -56.2 Dark Down 58.9 159.4 Up 06:00:42 - 06:30:42 7081
Toppenish/White Swan 06:15:41 -56.4 Dark Down 59.2 159.6 Up 06:00:41 - 06:30:41 7060
PNWRO 06:15:37 -57.5 Dark Down 59.8 162.1 Up 06:00:37 - 06:30:37 7023
Goldendale 06:15:43 -56.5 Dark Down 59.6 158.5 Up 06:00:43 - 06:30:43 7006
The Dalles 06:15:44 -56.5 Dark Down 59.7 157.7 Up 06:00:44 - 06:30:44 6985
Maupin 06:15:44 -56.8 Dark Down 60.1 157.6 Up 06:00:44 - 06:30:44 6944
Sisters 06:15:46 -57.0 Dark Down 60.8 156.1 Up 06:00:46 - 06:30:46 6858
Bend 06:15:46 -57.3 Dark Down 61.1 156.4 Up 06:00:46 - 06:30:46 6834
Oregon Observatory 06:15:46 -57.3 Dark Down 61.2 156.0 Up 06:00:46 - 06:30:46 6817
North Lake 06:15:44 -57.9 Dark Down 61.9 156.6 Up 06:00:44 - 06:30:44 6753
Chiloquin 06:15:48 -57.7 Dark Down 62.3 154.2 Up 06:00:48 - 06:30:48 6687
Klamath Falls 06:15:48 -57.9 Dark Down 62.6 154.1 Up 06:00:48 - 06:30:48 6652
Lakeview 06:15:43 -58.8 Dark Down 63.1 156.9 Up 06:00:43 - 06:30:43 6647
Cedarville 06:15:43 -59.3 Dark Down 63.7 156.7 Up 06:00:43 - 06:30:43 6580
Fall River/Burney 06:15:47 -58.8 Dark Down 63.8 153.8 Up 06:00:47 - 06:30:47 6532
Dunrhomin 06:14:49 -68.4 Dark Down 66.3 190.2 Up 05:59:49 - 06:29:49 6485
Susanville 06:15:45 -59.5 Dark Down 64.6 154.8 Up 06:00:45 - 06:30:45 6467
CU-SBO 06:14:50 -68.6 Dark Down 66.6 190.0 Up 05:59:50 - 06:29:50 6460
Greenville 06:15:45 -59.5 Dark Down 64.7 153.9 Up 06:00:45 - 06:30:45 6440
Gimple 06:15:45 -59.5 Dark Down 64.8 154.1 Up 06:00:45 - 06:30:45 6439
Quincy 06:15:46 -59.6 Dark Down 64.9 153.8 Up 06:00:46 - 06:30:46 6419
Portola 06:15:44 -60.0 Dark Down 65.2 154.6 Up 06:00:44 - 06:30:44 6406
Reno 06:15:41 -60.5 Dark Down 65.6 155.8 Up 06:00:41 - 06:30:41 6378
Carson City 06:15:42 -60.7 Dark Down 66.0 155.5 Up 06:00:42 - 06:30:42 6341
Yerington 06:15:40 -61.2 Dark Down 66.3 156.7 Up 06:00:40 - 06:30:40 6320
Gardnerville 06:15:42 -60.8 Dark Down 66.2 155.4 Up 06:00:42 - 06:30:42 6316
Hawthorne 06:15:38 -61.8 Dark Down 66.9 157.5 Up 06:00:38 - 06:30:38 6272
Tonopah 06:15:33 -63.0 Dark Down 67.8 160.4 Up 06:00:33 - 06:30:33 6224
Lee Vining 06:15:40 -61.7 Dark Down 67.3 155.8 Up 06:00:40 - 06:30:40 6214
Bishop 06:15:38 -62.5 Dark Down 68.1 157.0 Up 06:00:38 - 06:30:38 6152
Beatty 06:15:32 -63.9 Dark Down 69.0 160.6 Up 06:00:32 - 06:30:32 6104
Indian Springs 06:15:27 -64.8 Dark Down 69.6 163.1 Up 06:00:27 - 06:30:27 6071
Henderson 06:15:25 -65.5 Dark Down 70.2 164.5 Up 06:00:25 - 06:30:25 6015
Patrick 06:15:21 -66.6 Dark Down 71.0 167.2 Up 06:00:21 - 06:30:21 5951
Kingman/Dolan Springs 06:15:21 -66.6 Dark Down 71.2 166.5 Up 06:00:21 - 06:30:21 5928
Laughlin/Bullhead City 06:15:24 -66.2 Dark Down 71.1 165.0 Up 06:00:24 - 06:30:24 5924
Mohave Valley 06:15:23 -66.3 Dark Down 71.4 164.8 Up 06:00:23 - 06:30:23 5895
Lake Havasu City 06:15:23 -66.7 Dark Down 71.9 165.2 Up 06:00:23 - 06:30:23 5854
Parker 06:15:23 -66.9 Dark Down 72.2 165.0 Up 06:00:23 - 06:30:23 5816
Wildwood 06:15:39 -63.7 Dark Down 71.0 152.7 Up 06:00:39 - 06:30:39 5808
George/Scottsdale 06:15:12 -68.8 Dark Down 73.0 172.3 Up 06:00:12 - 06:30:12 5777
Idyllwild 06:15:32 -65.2 Dark Down 71.9 157.5 Up 06:00:32 - 06:30:32 5770
Calipatria 06:15:28 -66.4 Dark Down 72.9 160.3 Up 06:00:28 - 06:30:28 5706
Yuma 06:15:24 -67.2 Dark Down 73.5 162.7 Up 06:00:24 - 06:30:24 5662

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 612891, (2029/01/10 06:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.89 141
Alhena         06:37:42.8 +16:23:56  1.9  4.89 135
PPM 122270     06:19:01.8 +17:19:31  6.1  0.61 140
PPM 122244     06:18:06.1 +17:07:29  8.1  0.32 140
PPM 122235     06:17:39.7 +16:53:04  9.4  0.07 140
612891         06:17:23.6 +16:51:10 16.8       140
Positions are for J2000

Event circumstances last updated at 2022/06/03 23:01:52 UT

Marc W. Buie, Southwest Research Institute

RECON