RECON: TNO occultation with 04VM131

Event between 04VM131 and star GA1020:01688008 with event index number of 1985734

Geocentric closest approach at 2023/12/12 09:40:27 UTC

J2000 position of star is 06:20:20.2 +12:25:21
Equinox of date position of star is 06:21:36.8 +12:24:39
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 153 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=24.0

[RECON map]
TNO is 35.9 AU from the Sun and 34.9 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 712 seconds.
The 1-sigma cross-track error in the shadow position is 3522 km.
The sky-plane scale is 25327.0 km/arcsec.

The TNO has an absolute magnitude Hv=8.4
Diameter=127.6 km assuming a 5% albedo -- 5.2 sec chord
Diameter=52.1 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 04VM131, (2023/12/12 09:40UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:28.1 +07:24:34  0.4  7.97 155
Alhena         06:39:05.7 +16:22:36  1.9  5.79 152
PPM 122364     06:23:57.1 +12:33:24  6.4  0.57 153
PPM 122290     06:20:55.1 +12:26:33  8.2  0.19 153
04VM131        06:21:40.8 +12:24:37 15.6       153
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 1.3 sigma about the mid-time.
The median site spacing is 28.0 km RECON observability=1.0 and success probability=14.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:39:12 -47.6 Dark Down 45.7 215.6 Up 09:24:12 - 09:54:12 1407
Kamloops 09:39:50 -55.7 Dark Down 50.8 196.1 Up 09:24:50 - 09:54:50 1272
Kelowna 09:39:47 -55.8 Dark Down 51.4 197.8 Up 09:24:47 - 09:54:47 1200
Peachland 09:39:48 -56.1 Dark Down 51.6 197.4 Up 09:24:48 - 09:54:48 1190
Summerland 09:39:47 -56.1 Dark Down 51.7 197.6 Up 09:24:47 - 09:54:47 1177
Penticton 09:39:47 -56.1 Dark Down 51.8 197.8 Up 09:24:47 - 09:54:47 1171
Oliver 09:39:47 -56.3 Dark Down 52.1 197.9 Up 09:24:47 - 09:54:47 1139
Anarchist Mountain Observatory 09:39:46 -56.4 Dark Down 52.2 198.3 Up 09:24:46 - 09:54:46 1124
Tonasket 09:39:46 -56.6 Dark Down 52.5 198.3 Up 09:24:46 - 09:54:46 1096
Victoria 09:39:58 -58.6 Dark Down 53.4 192.1 Up 09:24:58 - 09:54:58 1085
Okanogan 09:39:46 -56.9 Dark Down 52.9 198.2 Up 09:24:46 - 09:54:46 1066
Brewster 09:39:47 -57.2 Dark Down 53.2 198.0 Up 09:24:47 - 09:54:47 1042
Manson/Chelan 09:39:48 -57.5 Dark Down 53.5 197.5 Up 09:24:48 - 09:54:48 1023
Wenatchee 09:39:48 -57.9 Dark Down 53.9 197.4 Up 09:24:48 - 09:54:48 980
Ellensburg 09:39:48 -58.3 Dark Down 54.4 197.2 Up 09:24:48 - 09:54:48 942
Yakima 09:39:48 -58.5 Dark Down 54.8 197.3 Up 09:24:48 - 09:54:48 905
Toppenish/White Swan 09:39:48 -58.6 Dark Down 54.9 197.7 Up 09:24:48 - 09:54:48 885
PNWRO 09:39:43 -58.0 Dark Down 55.0 200.3 Up 09:24:43 - 09:54:43 849
Goldendale 09:39:49 -59.1 Dark Down 55.6 197.2 Up 09:24:49 - 09:54:49 834
The Dalles 09:39:50 -59.5 Dark Down 55.9 196.7 Up 09:24:50 - 09:54:50 813
Maupin 09:39:50 -59.7 Dark Down 56.2 197.1 Up 09:24:50 - 09:54:50 774
Sisters 09:39:51 -60.5 Dark Down 57.2 196.6 Up 09:24:51 - 09:54:51 692
Bend 09:39:50 -60.5 Dark Down 57.4 197.2 Up 09:24:50 - 09:54:50 669
Oregon Observatory 09:39:50 -60.7 Dark Down 57.5 197.0 Up 09:24:50 - 09:54:50 653
North Lake 09:39:48 -60.7 Dark Down 58.0 198.3 Up 09:24:48 - 09:54:48 591
Chiloquin 09:39:51 -61.7 Dark Down 58.9 196.9 Up 09:24:51 - 09:54:51 528
Klamath Falls 09:39:51 -61.9 Dark Down 59.2 197.2 Up 09:24:51 - 09:54:51 494
Lakeview 09:39:47 -61.0 Dark Down 58.9 199.9 Up 09:24:47 - 09:54:47 489
Cedarville 09:39:46 -61.3 Dark Down 59.5 200.6 Up 09:24:46 - 09:54:46 425
Fall River/Burney 09:39:50 -62.3 Dark Down 60.2 198.6 Up 09:24:50 - 09:54:50 379
Dunrhomin 09:38:56 -51.4 Dark Down 54.4 225.8 Up 09:23:56 - 09:53:56 317
Susanville 09:39:47 -62.1 Dark Down 60.6 200.3 Up 09:24:47 - 09:54:47 316
CU-SBO 09:38:56 -51.5 Dark Down 54.6 225.9 Up 09:23:56 - 09:53:56 293
Greenville 09:39:48 -62.5 Dark Down 61.0 199.9 Up 09:24:48 - 09:54:48 289
Gimple 09:39:48 -62.4 Dark Down 61.0 200.1 Up 09:24:48 - 09:54:48 289
Quincy 09:39:48 -62.6 Dark Down 61.2 200.1 Up 09:24:48 - 09:54:48 269
Portola 09:39:46 -62.3 Dark Down 61.2 201.1 Up 09:24:46 - 09:54:46 256
Reno 09:39:44 -62.0 Dark Down 61.2 202.5 Up 09:24:44 - 09:54:44 229
Carson City 09:39:44 -62.2 Dark Down 61.6 202.8 Up 09:24:44 - 09:54:44 194
Yerington 09:39:41 -61.8 Dark Down 61.5 204.1 Up 09:24:41 - 09:54:41 174
Gardnerville 09:39:43 -62.2 Dark Down 61.8 203.0 Up 09:24:43 - 09:54:43 169
Hawthorne 09:39:39 -61.7 Dark Down 61.8 205.5 Up 09:24:39 - 09:54:39 127
Tonopah 09:39:34 -60.8 Dark Down 61.7 208.6 Up 09:24:34 - 09:54:34 79
Lee Vining 09:39:41 -62.2 Dark Down 62.5 205.0 Up 09:24:41 - 09:54:41 71
Bishop 09:39:38 -62.0 Dark Down 62.8 206.9 Up 09:24:38 - 09:54:38 10
Beatty 09:39:32 -60.9 Dark Down 62.5 210.5 Up 09:24:32 - 09:54:32 -38
Indian Springs 09:39:28 -60.2 Dark Down 62.4 212.9 Up 09:24:28 - 09:54:28 -71
Henderson 09:39:26 -59.9 Dark Down 62.5 214.7 Up 09:24:26 - 09:54:26 -125
Patrick 09:39:22 -59.2 Dark Down 62.5 217.5 Up 09:24:22 - 09:54:22 -188
Kingman/Dolan Springs 09:39:22 -59.4 Dark Down 62.8 217.4 Up 09:24:22 - 09:54:22 -211
Laughlin/Bullhead City 09:39:24 -59.8 Dark Down 63.0 216.5 Up 09:24:24 - 09:54:24 -214
Mohave Valley 09:39:24 -59.9 Dark Down 63.2 216.8 Up 09:24:24 - 09:54:24 -242
Lake Havasu City 09:39:23 -59.8 Dark Down 63.4 217.7 Up 09:24:23 - 09:54:23 -283
Parker 09:39:22 -59.8 Dark Down 63.7 218.2 Up 09:24:22 - 09:54:22 -320
Wildwood 09:39:38 -63.2 Dark Down 65.7 209.7 Up 09:24:38 - 09:54:38 -324
George/Scottsdale 09:39:13 -58.0 Dark Down 62.7 223.1 Up 09:24:13 - 09:54:13 -361
Idyllwild 09:39:31 -61.8 Dark Down 65.2 214.1 Up 09:24:31 - 09:54:31 -362
Calipatria 09:39:26 -61.0 Dark Down 65.1 217.2 Up 09:24:26 - 09:54:26 -426
Yuma 09:39:23 -60.4 Dark Down 65.0 219.5 Up 09:24:23 - 09:54:23 -470

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 04VM131, (2023/12/12 09:40UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.97 155
Alhena         06:37:42.8 +16:23:57  1.9  5.79 152
PPM 122364     06:22:36.3 +12:34:12  6.4  0.57 153
PPM 122290     06:19:34.4 +12:27:15  8.2  0.19 153
04VM131        06:20:20.2 +12:25:21 15.6       153
Positions are for J2000

Event circumstances last updated at 2022/09/27 03:27:43 UT

Marc W. Buie, Southwest Research Institute

RECON