RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star GA0940:02873561 with event index number of 1164986

Geocentric closest approach at 2022/01/31 03:43:53 UTC

J2000 position of star is 07:38:35.0 +04:44:07
Equinox of date position of star is 07:39:39.2 +04:41:17
Stellar brightness G=13.1, use SENSEUP=32
Star is 159 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 14.4 AU from the Sun and 13.5 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
The 1-sigma error in the time of the event is 87 seconds.
The 1-sigma cross-track error in the shadow position is 1026 km.
The sky-plane scale is 9809.5 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=72.4 km assuming a 5% albedo -- 2.7 sec chord
Diameter=29.6 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 250112, (2022/01/31 03:44UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:39.9 +27:58:16  1.1 23.35 176
Alhena         06:38:59.2 +16:22:43  1.9 18.95 160
PPM 152982     07:37:45.2 +05:48:42  6.2  1.23 160
PPM 153032     07:39:27.9 +04:53:29  7.7  0.22 159
PPM 153043     07:39:49.4 +04:35:45  8.8  0.09 159
250112         07:39:45.1 +04:41:01 13.1       159
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 5.0 sigma about the mid-time.
The median site spacing is 21.7 km RECON observability=1.0 and success probability=30.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 03:46:46 -28.6 Dark Down 29.9 122.9 Low 03:39:00 - 03:54:32 2102
Kelowna 03:46:47 -28.5 Dark Down 30.1 122.6 Up 03:39:01 - 03:54:33 2067
Peachland 03:46:48 -28.4 Dark Down 29.9 122.2 Low 03:39:02 - 03:54:34 2055
Summerland 03:46:48 -28.4 Dark Down 30.1 122.2 Up 03:39:02 - 03:54:34 2043
Penticton 03:46:48 -28.5 Dark Down 30.2 122.3 Up 03:39:02 - 03:54:34 2038
Oliver 03:46:49 -28.6 Dark Down 30.4 122.1 Up 03:39:03 - 03:54:35 2007
Anarchist Mountain Observatory 03:46:49 -28.7 Dark Down 30.6 122.2 Up 03:39:03 - 03:54:35 1993
Tonasket 03:46:49 -28.7 Dark Down 30.7 122.0 Up 03:39:03 - 03:54:35 1965
Okanogan 03:46:50 -28.6 Dark Down 30.8 121.7 Up 03:39:04 - 03:54:36 1934
Victoria 03:46:58 -26.1 Dark Down 28.5 118.2 Low 03:39:12 - 03:54:44 1927
Brewster 03:46:51 -28.5 Dark Down 30.8 121.4 Up 03:39:05 - 03:54:37 1909
Manson/Chelan 03:46:53 -28.3 Dark Down 30.7 120.9 Up 03:39:07 - 03:54:39 1888
Entiat 03:46:53 -28.3 Dark Down 30.8 120.8 Up 03:39:07 - 03:54:39 1867
Wenatchee 03:46:54 -28.2 Dark Down 30.9 120.5 Up 03:39:08 - 03:54:40 1844
Ellensburg 03:46:55 -28.1 Dark Down 30.9 120.1 Up 03:39:09 - 03:54:41 1805
Yakima 03:46:56 -28.2 Dark Down 31.1 119.9 Up 03:39:10 - 03:54:42 1768
Toppenish/White Swan 03:46:56 -28.3 Dark Down 31.4 119.9 Up 03:39:10 - 03:54:42 1749
Pasco 03:46:53 -29.2 Dark Down 32.2 121.1 Up 03:39:07 - 03:54:39 1746
PNWRO 03:46:53 -29.3 Dark Down 32.4 121.1 Up 03:39:07 - 03:54:39 1725
Goldendale 03:46:58 -28.0 Dark Down 31.4 119.3 Up 03:39:12 - 03:54:44 1696
The Dalles 03:46:59 -27.8 Dark Down 31.3 118.8 Up 03:39:13 - 03:54:45 1673
Maupin 03:47:00 -27.9 Dark Down 31.5 118.7 Up 03:39:14 - 03:54:46 1635
Redmond 03:47:02 -27.9 Dark Down 31.9 118.1 Up 03:39:16 - 03:54:48 1550
Sisters 03:47:02 -27.6 Dark Down 31.6 117.8 Up 03:39:16 - 03:54:48 1550
Bend 03:47:02 -27.8 Dark Down 31.9 117.9 Up 03:39:16 - 03:54:48 1529
Oregon Observatory 03:47:03 -27.7 Dark Down 31.9 117.7 Up 03:39:17 - 03:54:49 1512
La Pine/Gilchrist 03:47:03 -27.7 Dark Down 32.0 117.5 Up 03:39:17 - 03:54:49 1493
North Lake 03:47:03 -28.1 Dark Down 32.6 117.8 Up 03:39:17 - 03:54:49 1455
Paisley 03:47:03 -28.4 Dark Down 33.1 117.8 Up 03:39:17 - 03:54:49 1405
Lakeview 03:47:03 -28.6 Dark Down 33.4 117.7 Up 03:39:17 - 03:54:49 1358
Klamath Falls 03:47:07 -27.5 Dark Down 32.5 116.4 Up 03:39:21 - 03:54:53 1353
Cedarville 03:47:04 -28.7 Dark Down 33.8 117.5 Up 03:39:18 - 03:54:50 1296
Niwot 03:46:24 -40.0 Dark Down 43.9 131.4 Up 03:38:38 - 03:54:10 1292
SwRI 03:46:24 -40.0 Dark Down 43.9 131.2 Up 03:38:38 - 03:54:10 1281
Fall River/Burney 03:47:08 -27.8 Dark Down 33.2 116.1 Up 03:39:22 - 03:54:54 1241
Susanville 03:47:07 -28.4 Dark Down 34.0 116.4 Up 03:39:21 - 03:54:53 1185
Gimple 03:47:08 -28.2 Dark Down 34.0 116.0 Up 03:39:22 - 03:54:54 1156
Greenville 03:47:08 -28.2 Dark Down 33.9 115.9 Up 03:39:22 - 03:54:54 1156
Quincy 03:47:08 -28.2 Dark Down 34.0 115.8 Up 03:39:22 - 03:54:54 1136
Portola 03:47:07 -28.5 Dark Down 34.4 116.2 Up 03:39:21 - 03:54:53 1127
Reno 03:47:06 -29.0 Dark Down 35.0 116.6 Up 03:39:20 - 03:54:52 1105
Carson City 03:47:06 -29.1 Dark Down 35.2 116.4 Up 03:39:20 - 03:54:52 1070
Yerington 03:47:05 -29.5 Dark Down 35.7 116.8 Up 03:39:19 - 03:54:51 1056
Gardnerville 03:47:07 -29.1 Dark Down 35.3 116.2 Up 03:39:21 - 03:54:53 1046
Hawthorne 03:47:04 -30.0 Dark Down 36.3 116.9 Up 03:39:18 - 03:54:50 1014
Tonopah 03:47:01 -31.1 Dark Down 37.5 117.9 Up 03:39:15 - 03:54:47 978
Lee Vining 03:47:06 -29.6 Dark Down 36.2 116.2 Up 03:39:20 - 03:54:52 954
Bishop 03:47:05 -30.2 Dark Down 37.0 116.4 Up 03:39:19 - 03:54:51 900
Beatty 03:47:01 -31.5 Dark Down 38.3 117.5 Up 03:39:15 - 03:54:47 866
Indian Springs 03:46:58 -32.3 Dark Down 39.2 118.2 Up 03:39:12 - 03:54:44 842
Henderson 03:46:57 -32.9 Dark Down 40.0 118.5 Up 03:39:11 - 03:54:43 795
Patrick 03:46:54 -33.8 Dark Down 41.1 119.0 Up 03:39:08 - 03:54:40 742
Searchlight/Boulder City 03:46:57 -33.0 Dark Down 40.3 118.1 Up 03:39:11 - 03:54:43 738
Kingman/Dolan Springs 03:46:55 -33.7 Dark Down 41.0 118.7 Up 03:39:09 - 03:54:41 717
DCO 03:46:53 -34.4 Dark Down 41.7 119.4 Up 03:39:07 - 03:54:39 717
Laughlin/Bullhead City 03:46:57 -33.3 Dark Down 40.7 118.2 Up 03:39:11 - 03:54:43 710
Mohave Valley 03:46:57 -33.3 Dark Down 40.8 118.0 Up 03:39:11 - 03:54:43 683
CPSLO 03:47:14 -28.3 Dark Down 36.2 113.1 Up 03:39:28 - 03:55:00 675
Lake Havasu City 03:46:57 -33.5 Dark Down 41.2 117.9 Up 03:39:11 - 03:54:43 644
Parker 03:46:57 -33.5 Dark Down 41.4 117.7 Up 03:39:11 - 03:54:43 609
George/Scottsdale 03:46:50 -35.5 Dark Down 43.3 119.5 Up 03:39:04 - 03:54:36 589
Wildwood 03:47:09 -30.0 Dark Down 38.2 113.9 Up 03:39:23 - 03:54:55 567
Blythe 03:46:58 -33.3 Dark Down 41.4 117.0 Up 03:39:12 - 03:54:44 552
Idyllwild 03:47:04 -31.5 Dark Down 39.8 115.2 Up 03:39:18 - 03:54:50 546
Calipatria 03:47:01 -32.5 Dark Down 40.9 115.8 Up 03:39:15 - 03:54:47 493
Yuma 03:46:59 -33.2 Dark Down 41.8 116.2 Up 03:39:13 - 03:54:45 457

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 250112, (2022/01/31 03:44UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 23.35 176
Alhena         06:37:42.8 +16:23:57  1.9 18.95 160
PPM 152982     07:36:34.5 +05:51:44  6.2  1.23 160
PPM 153032     07:38:17.7 +04:56:34  7.7  0.22 159
PPM 153043     07:38:39.3 +04:38:51  8.8  0.09 159
250112         07:38:35.0 +04:44:07 13.1       159
Positions are for J2000

Event circumstances last updated at 2020/03/18 21:08:34 UT

Marc W. Buie, Southwest Research Institute

RECON