RECON: TNO occultation with 10VR11

Event between 10VR11 and star GA1140:01538945 with event index number of 1465953

Geocentric closest approach at 2025/12/30 09:13:12 UTC

J2000 position of star is 05:49:57.0 +24:13:27
Equinox of date position of star is 05:51:08.4 +24:13:43
Stellar brightness G=16.0, use SENSEUP=128
Star is 45 degrees from the moon. Moon is 78% illuminated.
TNO apparent brightness V=21.2

[RECON map]
TNO is 36.2 AU from the Sun and 35.3 AU from the Earth.
The TNO is moving 25.4 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 248 seconds.
The 1-sigma cross-track error in the shadow position is 4107 km.
The sky-plane scale is 25572.2 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 18.0 sec chord
Diameter=186.6 km assuming a 30% albedo -- 7.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 10VR11, (2025/12/30 09:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:34.8 +07:24:35  0.4 16.86  50
Alnath         05:27:56.2 +28:37:38  1.6  6.87  40
132 Tau        05:50:36.8 +24:34:26  4.9  0.40  45
PPM 095035     05:55:09.2 +24:17:25  8.1  0.83  46
PPM 094928     05:50:56.0 +24:13:44  8.7  0.14  45
10VR11         05:51:32.5 +24:13:48 16.0        45
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 3.6 sigma about the mid-time.
The median site spacing is 20.1 km RECON observability=1.0 and success probability=3.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:12:00 -59.8 Dark Up 55.2 233.6 Up 08:57:00 - 09:27:00 9586
Summerland 09:12:00 -60.1 Dark Up 55.6 233.5 Up 08:57:00 - 09:27:00 9553
Penticton 09:12:01 -60.1 Dark Up 55.5 233.8 Up 08:57:01 - 09:27:01 9549
Okanagan Falls 09:12:00 -60.3 Dark Up 55.7 234.0 Up 08:57:00 - 09:27:00 9531
Oliver 09:11:59 -60.4 Dark Up 55.8 234.2 Up 08:56:59 - 09:26:59 9516
Anarchist Mountain Observatory 09:11:59 -60.5 Dark Up 55.8 234.6 Up 08:56:59 - 09:26:59 9504
Oroville 09:11:59 -60.6 Dark Up 55.8 234.6 Up 08:56:59 - 09:26:59 9496
Tonasket 09:11:58 -60.8 Dark Up 56.0 234.9 Up 08:56:58 - 09:26:58 9474
Okanogan 09:11:58 -61.1 Dark Up 56.2 235.1 Up 08:56:58 - 09:26:58 9440
Brewster 09:11:57 -61.4 Dark Up 56.5 235.2 Up 08:56:57 - 09:26:57 9411
Manson/Chelan 09:11:59 -61.7 Dark Up 56.8 235.0 Up 08:56:59 - 09:26:59 9383
Entiat 09:11:59 -61.9 Dark Up 57.0 235.1 Up 08:56:59 - 09:26:59 9361
Wenatchee 09:11:58 -62.2 Dark Up 57.2 235.3 Up 08:56:58 - 09:26:58 9335
Ellensburg 09:11:58 -62.6 Dark Up 57.6 235.6 Up 08:56:58 - 09:26:58 9292
Yakima 09:11:57 -62.9 Dark Up 57.8 236.1 Up 08:56:57 - 09:26:57 9253
Pasco 09:11:53 -62.6 Dark Up 57.2 238.4 Up 08:56:53 - 09:26:53 9251
Toppenish/White Swan 09:11:56 -63.0 Dark Up 57.8 236.6 Up 08:56:56 - 09:26:56 9236
PNWRO 09:11:51 -62.7 Dark Up 57.2 239.0 Up 08:56:51 - 09:26:51 9232
George/Umatilla 09:11:53 -63.0 Dark Up 57.5 238.5 Up 08:56:53 - 09:26:53 9214
Goldendale 09:11:56 -63.7 Dark Up 58.4 236.8 Up 08:56:56 - 09:26:56 9174
The Dalles 09:11:56 -64.0 Dark Up 58.7 236.6 Up 08:56:56 - 09:26:56 9145
Maupin 09:11:56 -64.3 Dark Up 58.9 237.3 Up 08:56:56 - 09:26:56 9107
Madras/Culver 09:11:55 -64.7 Dark Up 59.2 238.0 Up 08:56:55 - 09:26:55 9053
Niwot 09:11:05 -58.2 Dark Up 49.9 260.4 Up 08:56:05 - 09:26:05 9025
Redmond 09:11:55 -65.1 Dark Up 59.4 238.4 Up 08:56:55 - 09:26:55 9017
SwRI 09:11:05 -58.3 Dark Up 50.0 260.4 Up 08:56:05 - 09:26:05 9012
Sisters 09:11:56 -65.2 Dark Up 59.6 237.9 Up 08:56:56 - 09:26:56 9011
Bend 09:11:55 -65.3 Dark Up 59.6 238.6 Up 08:56:55 - 09:26:55 8993
Oregon Observatory 09:11:55 -65.5 Dark Up 59.8 238.6 Up 08:56:55 - 09:26:55 8973
La Pine/Gilchrist 09:11:54 -65.7 Dark Up 59.9 238.9 Up 08:56:54 - 09:26:54 8952
North Lake 09:11:52 -65.7 Dark Up 59.8 240.3 Up 08:56:52 - 09:26:52 8923
Paisley 09:11:50 -66.0 Dark Up 59.8 241.6 Up 08:56:50 - 09:26:50 8876
Chiloquin 09:11:54 -66.7 Dark Up 60.7 240.1 Up 08:56:54 - 09:26:54 8835
Lakeview 09:11:49 -66.3 Dark Up 59.9 242.6 Up 08:56:49 - 09:26:49 8831
Klamath Falls 09:11:53 -66.9 Dark Up 60.8 240.7 Up 08:56:53 - 09:26:53 8803
Tulelake 09:11:51 -67.0 Dark Up 60.8 241.5 Up 08:56:51 - 09:26:51 8783
Cedarville 09:11:47 -66.7 Dark Up 60.1 243.8 Up 08:56:47 - 09:26:47 8770
Fall River/Burney 09:11:50 -67.7 Dark Up 61.2 243.1 Up 08:56:50 - 09:26:50 8694
Susanville 09:11:46 -67.8 Dark Up 60.9 245.0 Up 08:56:46 - 09:26:46 8648
Gimple 09:11:47 -68.1 Dark Up 61.2 245.2 Up 08:56:47 - 09:26:47 8616
Greenville 09:11:47 -68.1 Dark Up 61.3 245.1 Up 08:56:47 - 09:26:47 8614
Quincy 09:11:46 -68.2 Dark Up 61.3 245.4 Up 08:56:46 - 09:26:46 8594
Portola 09:11:45 -68.1 Dark Up 61.1 246.2 Up 08:56:45 - 09:26:45 8592
Reno 09:11:43 -67.9 Dark Up 60.7 247.4 Up 08:56:43 - 09:26:43 8581
Carson City 09:11:42 -68.1 Dark Up 60.8 248.0 Up 08:56:42 - 09:26:42 8545
Yerington 09:11:40 -67.9 Dark Up 60.5 249.1 Up 08:56:40 - 09:26:40 8541
Gardnerville 09:11:41 -68.3 Dark Up 60.9 248.5 Up 08:56:41 - 09:26:41 8522
Hawthorne 09:11:38 -67.9 Dark Up 60.2 250.4 Up 08:56:38 - 09:26:38 8507
Tonopah 09:11:32 -67.3 Dark Up 59.3 252.6 Up 08:56:32 - 09:26:32 8495
Lee Vining 09:11:38 -68.5 Dark Up 60.8 250.8 Up 08:56:38 - 09:26:38 8438
Bishop 09:11:35 -68.5 Dark Up 60.4 252.6 Up 08:56:35 - 09:26:35 8396
Beatty 09:11:29 -67.6 Dark Up 59.3 254.9 Up 08:56:29 - 09:26:29 8391
Indian Springs 09:11:26 -67.1 Dark Up 58.6 256.4 Up 08:56:26 - 09:26:26 8386
Henderson 09:11:23 -66.9 Dark Up 58.2 257.9 Up 08:56:23 - 09:26:23 8351
Lone Pine 09:11:33 -68.7 Dark Up 60.4 254.2 Up 08:56:33 - 09:26:33 8327
Patrick 09:11:18 -66.3 Dark Up 57.4 259.8 Up 08:56:18 - 09:26:18 8318
DCO 09:11:16 -65.9 Dark Up 56.9 260.8 Up 08:56:16 - 09:26:16 8307
Searchlight/Boulder City 09:11:20 -67.1 Dark Up 58.2 258.8 Up 08:56:20 - 09:26:20 8295
Kingman/Dolan Springs 09:11:18 -66.6 Dark Up 57.6 260.0 Up 08:56:18 - 09:26:18 8291
Laughlin/Bullhead City 09:11:20 -67.0 Dark Up 58.0 259.6 Up 08:56:20 - 09:26:20 8274
Mohave Valley 09:11:19 -67.1 Dark Up 58.1 260.0 Up 08:56:19 - 09:26:19 8247
Lake Havasu City 09:11:18 -67.1 Dark Up 57.9 260.8 Up 08:56:18 - 09:26:18 8213
Parker 09:11:17 -67.2 Dark Up 58.0 261.4 Up 08:56:17 - 09:26:17 8178
CPSLO 09:11:38 -71.1 Dark Up 62.8 253.9 Up 08:56:38 - 09:26:38 8130
Blythe 09:11:17 -67.6 Dark Up 58.3 262.0 Up 08:56:17 - 09:26:17 8117
Idyllwild 09:11:24 -69.2 Dark Up 60.0 260.2 Up 08:56:24 - 09:26:24 8071
Wildwood 09:11:30 -70.4 Dark Up 61.4 258.0 Up 08:56:30 - 09:26:30 8058
Calipatria 09:11:19 -68.5 Dark Up 59.1 262.2 Up 08:56:19 - 09:26:19 8041
Yuma 09:11:16 -68.0 Dark Up 58.4 263.5 Up 08:56:16 - 09:26:16 8021

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 10VR11, (2025/12/30 09:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 16.86  50
Alnath         05:26:17.5 +28:36:23  1.6  6.87  40
132 Tau        05:49:00.9 +24:34:02  4.9  0.40  45
PPM 095035     05:53:33.6 +24:17:13  8.1  0.83  46
PPM 094928     05:49:20.5 +24:13:21  8.7  0.14  45
10VR11         05:49:57.0 +24:13:27 16.0        45
Positions are for J2000

Event circumstances last updated at 2019/06/08 13:20:11 UT

Marc W. Buie, Southwest Research Institute

RECON