RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star GA1140:02927253 with event index number of 1231044

Geocentric closest approach at 2023/02/12 06:25:15 UTC

J2000 position of star is 07:45:25.0 +25:26:15
Equinox of date position of star is 07:46:35.8 +25:23:21
Stellar brightness G=15.7, use SENSEUP=128
Star is 103 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=20.8

[RECON map]
TNO is 29.2 AU from the Sun and 28.3 AU from the Earth.
The TNO is moving 20.3 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 329 seconds.
The 1-sigma cross-track error in the shadow position is 1752 km.
The sky-plane scale is 20539.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=331.1 km assuming a 5% albedo -- 17.9 sec chord
Diameter=135.2 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2023/02/12 06:25UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.8 +27:58:07  1.1  2.59 103
77Kap Gem      07:45:50.4 +24:20:27  3.6  1.06 103
76 Gem         07:45:31.3 +25:43:38  6.6  0.45 103
450265         07:46:49.2 +25:22:48 15.7       102
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 2.7 sigma about the mid-time.
The median site spacing is 24.9 km RECON observability=1.0 and success probability=16.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:25:22 -47.9 Dark Down 65.5 185.8 Up 06:10:22 - 06:40:22 3398
Summerland 06:25:23 -48.0 Dark Down 65.8 185.2 Up 06:10:23 - 06:40:23 3365
Penticton 06:25:22 -48.1 Dark Down 65.8 185.5 Up 06:10:22 - 06:40:22 3359
Okanagan Falls 06:25:22 -48.2 Dark Down 66.0 185.5 Up 06:10:22 - 06:40:22 3340
Oliver 06:25:22 -48.3 Dark Down 66.2 185.6 Up 06:10:22 - 06:40:22 3324
Anarchist Mountain Observatory 06:25:21 -48.5 Dark Down 66.3 186.0 Up 06:10:21 - 06:40:21 3309
Oroville 06:25:21 -48.6 Dark Down 66.4 185.9 Up 06:10:21 - 06:40:21 3300
Tonasket 06:25:21 -48.7 Dark Down 66.6 185.9 Up 06:10:21 - 06:40:21 3277
Okanogan 06:25:21 -48.9 Dark Down 67.0 185.7 Up 06:10:21 - 06:40:21 3241
Brewster 06:25:22 -49.0 Dark Down 67.3 185.3 Up 06:10:22 - 06:40:22 3212
Manson/Chelan 06:25:23 -49.0 Dark Down 67.5 184.5 Up 06:10:23 - 06:40:23 3187
Entiat 06:25:23 -49.2 Dark Down 67.7 184.3 Up 06:10:23 - 06:40:23 3164
Wenatchee 06:25:23 -49.3 Dark Down 68.0 184.1 Up 06:10:23 - 06:40:23 3137
Ellensburg 06:25:24 -49.5 Dark Down 68.4 183.7 Up 06:10:24 - 06:40:24 3092
Yakima 06:25:24 -49.8 Dark Down 68.8 183.7 Up 06:10:24 - 06:40:24 3051
Pasco 06:25:18 -50.7 Dark Down 69.1 187.3 Up 06:10:18 - 06:40:18 3031
Toppenish/White Swan 06:25:23 -50.0 Dark Down 69.0 184.2 Up 06:10:23 - 06:40:23 3030
PNWRO 06:25:17 -51.0 Dark Down 69.3 188.0 Up 06:10:17 - 06:40:17 3008
George/Umatilla 06:25:19 -50.8 Dark Down 69.4 186.9 Up 06:10:19 - 06:40:19 2994
Goldendale 06:25:24 -50.2 Dark Down 69.6 183.2 Up 06:10:24 - 06:40:24 2969
The Dalles 06:25:25 -50.2 Dark Down 69.8 182.3 Up 06:10:25 - 06:40:25 2942
Maupin 06:25:25 -50.5 Dark Down 70.2 182.6 Up 06:10:25 - 06:40:25 2900
Madras/Culver 06:25:24 -50.9 Dark Down 70.8 182.5 Up 06:10:24 - 06:40:24 2842
Redmond 06:25:25 -51.1 Dark Down 71.2 182.5 Up 06:10:25 - 06:40:25 2805
Sisters 06:25:26 -50.9 Dark Down 71.1 181.3 Up 06:10:26 - 06:40:26 2803
Bend 06:25:25 -51.2 Dark Down 71.4 182.1 Up 06:10:25 - 06:40:25 2781
Oregon Observatory 06:25:25 -51.2 Dark Down 71.5 181.7 Up 06:10:25 - 06:40:25 2761
La Pine/Gilchrist 06:25:25 -51.3 Dark Down 71.8 181.6 Up 06:10:25 - 06:40:25 2739
North Lake 06:25:23 -51.9 Dark Down 72.2 183.4 Up 06:10:23 - 06:40:23 2700
Paisley 06:25:20 -52.5 Dark Down 72.7 184.5 Up 06:10:20 - 06:40:20 2646
Chiloquin 06:25:26 -51.8 Dark Down 72.9 180.6 Up 06:10:26 - 06:40:26 2619
Niwot 06:24:18 -61.4 Dark Down 69.8 228.4 Up 06:09:18 - 06:39:18 2612
SwRI 06:24:17 -61.5 Dark Down 69.9 228.4 Up 06:09:17 - 06:39:17 2599
Lakeview 06:25:20 -52.9 Dark Down 73.2 185.3 Up 06:10:20 - 06:40:20 2595
Klamath Falls 06:25:26 -52.1 Dark Down 73.2 180.9 Up 06:10:26 - 06:40:26 2584
Tulelake 06:25:24 -52.5 Dark Down 73.5 181.8 Up 06:10:24 - 06:40:24 2558
Cedarville 06:25:19 -53.5 Dark Down 73.8 186.0 Up 06:10:19 - 06:40:19 2527
Fall River/Burney 06:25:23 -53.1 Dark Down 74.4 182.2 Up 06:10:23 - 06:40:23 2463
Susanville 06:25:20 -53.9 Dark Down 75.0 184.8 Up 06:10:20 - 06:40:20 2404
Gimple 06:25:21 -54.0 Dark Down 75.3 184.2 Up 06:10:21 - 06:40:21 2372
Greenville 06:25:21 -53.9 Dark Down 75.3 183.9 Up 06:10:21 - 06:40:21 2371
Quincy 06:25:21 -54.0 Dark Down 75.5 183.9 Up 06:10:21 - 06:40:21 2350
Portola 06:25:19 -54.4 Dark Down 75.6 185.6 Up 06:10:19 - 06:40:19 2342
Reno 06:25:16 -54.9 Dark Down 75.8 188.1 Up 06:10:16 - 06:40:16 2321
Carson City 06:25:15 -55.2 Dark Down 76.1 188.4 Up 06:10:15 - 06:40:15 2283
Yerington 06:25:12 -55.7 Dark Down 76.2 190.8 Up 06:10:12 - 06:40:12 2269
Gardnerville 06:25:15 -55.4 Dark Down 76.4 188.7 Up 06:10:15 - 06:40:15 2257
Hawthorne 06:25:10 -56.3 Dark Down 76.6 193.2 Up 06:10:10 - 06:40:10 2226
Tonopah 06:25:04 -57.4 Dark Down 76.8 199.0 Up 06:10:04 - 06:40:04 2195
Lee Vining 06:25:11 -56.4 Dark Down 77.2 191.8 Up 06:10:11 - 06:40:11 2160
Bishop 06:25:08 -57.2 Dark Down 77.7 195.4 Up 06:10:08 - 06:40:08 2105
Beatty 06:25:01 -58.5 Dark Down 77.7 202.6 Up 06:10:01 - 06:40:01 2077
Indian Springs 06:24:56 -59.3 Dark Down 77.6 207.4 Up 06:09:56 - 06:39:56 2057
Lone Pine 06:25:06 -57.9 Dark Down 78.3 197.8 Up 06:10:06 - 06:40:06 2027
Henderson 06:24:52 -60.1 Dark Down 77.8 211.2 Up 06:09:52 - 06:39:52 2011
Patrick 06:24:47 -61.1 Dark Down 77.9 216.9 Up 06:09:47 - 06:39:47 1961
Searchlight/Boulder City 06:24:51 -60.5 Dark Down 78.3 212.9 Up 06:09:51 - 06:39:51 1950
DCO 06:24:44 -61.8 Dark Down 77.8 220.2 Up 06:09:44 - 06:39:44 1939
Kingman/Dolan Springs 06:24:47 -61.2 Dark Down 78.1 216.8 Up 06:09:47 - 06:39:47 1934
Laughlin/Bullhead City 06:24:50 -60.9 Dark Down 78.4 215.0 Up 06:09:50 - 06:39:50 1923
Mohave Valley 06:24:49 -61.1 Dark Down 78.6 215.8 Up 06:09:49 - 06:39:49 1894
CPSLO 06:25:16 -56.9 Dark Down 80.1 187.1 Up 06:10:16 - 06:40:16 1855
Lake Havasu City 06:24:48 -61.5 Dark Down 78.8 217.9 Up 06:09:48 - 06:39:48 1855
Parker 06:24:47 -61.7 Dark Down 79.1 219.1 Up 06:09:47 - 06:39:47 1817
Blythe 06:24:48 -61.9 Dark Down 79.6 219.7 Up 06:09:48 - 06:39:48 1756
Wildwood 06:25:06 -59.0 Dark Down 80.9 199.6 Up 06:10:06 - 06:40:06 1749
Idyllwild 06:24:58 -60.5 Dark Down 80.5 210.0 Up 06:09:58 - 06:39:58 1737
Calipatria 06:24:51 -61.6 Dark Down 80.5 217.5 Up 06:09:51 - 06:39:51 1688
Yuma 06:24:47 -62.4 Dark Down 80.4 223.0 Up 06:09:47 - 06:39:47 1656

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 450265, (2023/02/12 06:25UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1  2.59 103
77Kap Gem      07:44:26.8 +24:23:52  3.6  1.06 103
76 Gem         07:44:06.9 +25:47:03  6.6  0.45 103
450265         07:45:25.0 +25:26:15 15.7       103
Positions are for J2000

Event circumstances last updated at 2019/06/08 04:43:59 UT

Marc W. Buie, Southwest Research Institute

RECON