RECON: TNO occultation with 11QY100

Event between 11QY100 and star GA0880:02912737 with event index number of 1587343

Geocentric closest approach at 2025/11/22 09:06:59 UTC

J2000 position of star is 07:30:12.3 -01:36:15
Equinox of date position of star is 07:31:13.2 -01:38:50
Stellar brightness G=15.9, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 20.6 AU from the Sun and 20.1 AU from the Earth.
The TNO is moving 11.8 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 330 seconds.
The 1-sigma cross-track error in the shadow position is 1735 km.
The sky-plane scale is 14563.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=134.9 km assuming a 5% albedo -- 11.3 sec chord
Diameter=55.1 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 11QY100, (2025/11/22 09:07UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:17.5 -16:45:05 -1.5 18.75 131
Alhena         06:39:12.4 +16:22:30  1.9 22.18 160
PPM 190211     07:23:36.5 -03:01:49  6.5  2.40 139
PPM 176968     07:32:04.8 -01:10:38  8.4  0.50 139
PPM 176962     07:31:12.5 -01:33:13  9.7  0.13 138
11QY100        07:31:31.0 -01:39:36 15.9       138
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 13.4 km RECON observability=1.0 and success probability=11.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 09:07:00 -58.6 Dark Down 30.2 135.1 Up 08:52:00 - 09:22:00 2943
Clarence Fulton 09:06:29 -55.8 Dark Down 30.7 139.9 Up 08:51:29 - 09:21:29 2901
Kelowna 09:06:32 -56.1 Dark Down 30.9 139.6 Up 08:51:32 - 09:21:32 2891
Summerland 09:06:35 -56.4 Dark Down 31.1 139.3 Up 08:51:35 - 09:21:35 2886
Penticton 09:06:37 -56.4 Dark Down 31.2 139.4 Up 08:51:37 - 09:21:37 2880
Oliver 09:06:37 -56.7 Dark Down 31.4 139.3 Up 08:51:37 - 09:21:37 2866
Anarchist Mountain Observatory 09:06:38 -56.8 Dark Down 31.6 139.4 Up 08:51:38 - 09:21:38 2854
Tonasket 09:06:39 -57.0 Dark Down 31.9 139.2 Up 08:51:39 - 09:21:39 2843
Okanogan 09:06:44 -57.4 Dark Down 32.1 138.9 Up 08:51:44 - 09:21:44 2833
Manson/Chelan 09:06:47 -58.0 Dark Down 32.2 138.2 Up 08:51:47 - 09:21:47 2829
Brewster 09:06:45 -57.6 Dark Down 32.2 138.6 Up 08:51:45 - 09:21:45 2828
Entiat 09:06:50 -58.2 Dark Down 32.3 138.0 Up 08:51:50 - 09:21:50 2822
Wenatchee 09:06:52 -58.4 Dark Down 32.4 137.8 Up 08:51:52 - 09:21:52 2814
Ellensburg 09:06:56 -58.8 Dark Down 32.7 137.4 Up 08:51:56 - 09:21:56 2802
Yakima 09:06:58 -59.1 Dark Down 33.0 137.2 Up 08:51:58 - 09:21:58 2785
Toppenish/White Swan 09:06:59 -59.2 Dark Down 33.2 137.3 Up 08:51:59 - 09:21:59 2770
Goldendale 09:07:04 -59.8 Dark Down 33.4 136.6 Up 08:52:04 - 09:22:04 2758
The Dalles 09:07:08 -60.2 Dark Down 33.4 136.2 Up 08:52:08 - 09:22:08 2758
Maupin 09:07:09 -60.4 Dark Down 33.8 136.1 Up 08:52:09 - 09:22:09 2736
Pasco 09:06:53 -58.8 Dark Down 33.9 138.6 Up 08:51:53 - 09:21:53 2728
PNWRO 09:06:53 -58.9 Dark Down 34.2 138.7 Up 08:51:53 - 09:21:53 2711
Sisters 09:07:18 -61.3 Dark Down 34.2 135.2 Up 08:52:18 - 09:22:18 2710
Redmond 09:07:17 -61.2 Dark Down 34.4 135.6 Up 08:52:17 - 09:22:17 2697
Bend 09:07:17 -61.4 Dark Down 34.5 135.3 Up 08:52:17 - 09:22:17 2691
Oregon Observatory 09:07:19 -61.6 Dark Down 34.5 135.1 Up 08:52:19 - 09:22:19 2687
La Pine/Gilchrist 09:07:19 -61.8 Dark Down 34.6 135.0 Up 08:52:19 - 09:22:19 2679
North Lake 09:07:19 -61.8 Dark Down 35.3 135.4 Up 08:52:19 - 09:22:19 2640
Klamath Falls 09:07:19 -63.0 Dark Down 35.5 133.9 Up 08:52:19 - 09:22:19 2619
Paisley 09:07:19 -62.1 Dark Down 35.8 135.5 Up 08:52:19 - 09:22:19 2602
Lakeview 09:07:19 -62.3 Dark Down 36.3 135.4 Up 08:52:19 - 09:22:19 2571
Fall River/Burney 09:07:19 -63.7 Dark Down 36.5 133.7 Up 08:52:19 - 09:22:19 2552
Cedarville 09:07:19 -62.7 Dark Down 36.9 135.3 Up 08:52:19 - 09:22:19 2533
Susanville 09:07:19 -63.8 Dark Down 37.4 134.2 Up 08:52:19 - 09:22:19 2496
Greenville 09:07:19 -64.1 Dark Down 37.4 133.7 Up 08:52:19 - 09:22:19 2494
Gimple 09:07:19 -64.1 Dark Down 37.5 133.8 Up 08:52:19 - 09:22:19 2491
Quincy 09:07:19 -64.3 Dark Down 37.5 133.6 Up 08:52:19 - 09:22:19 2485
Portola 09:07:19 -64.1 Dark Down 37.9 134.0 Up 08:52:19 - 09:22:19 2461
Reno 09:07:19 -63.9 Dark Down 38.4 134.6 Up 08:52:19 - 09:22:19 2424
Carson City 09:07:19 -64.1 Dark Down 38.7 134.4 Up 08:52:19 - 09:22:19 2406
Gardnerville 09:07:19 -64.2 Dark Down 38.9 134.3 Up 08:52:19 - 09:22:19 2392
Yerington 09:07:19 -63.9 Dark Down 39.2 135.0 Up 08:52:19 - 09:22:19 2371
Hawthorne 09:07:19 -63.8 Dark Down 39.8 135.3 Up 08:52:19 - 09:22:19 2328
Lee Vining 09:07:19 -64.5 Dark Down 39.9 134.4 Up 08:52:19 - 09:22:19 2320
Bishop 09:07:19 -64.4 Dark Down 40.8 134.8 Up 08:52:19 - 09:22:19 2261
Tonopah 09:07:19 -63.2 Dark Down 40.9 136.5 Up 08:52:19 - 09:22:19 2249
CPSLO 09:08:09 -66.9 Dark Down 41.0 131.3 Up 08:53:09 - 09:23:09 2190
Beatty 09:07:19 -63.6 Dark Down 42.0 136.3 Up 08:52:19 - 09:22:19 2168
Indian Springs 09:07:19 -63.0 Dark Down 42.8 137.4 Up 08:52:19 - 09:22:19 2106
Henderson 09:07:19 -62.8 Dark Down 43.6 137.8 Up 08:52:19 - 09:22:19 2047
Wildwood 09:08:05 -66.2 Dark Down 43.0 132.7 Up 08:53:05 - 09:23:05 2044
Searchlight/Boulder City 09:07:19 -63.0 Dark Down 44.1 137.5 Up 08:52:19 - 09:22:19 2012
Laughlin/Bullhead City 09:07:19 -62.9 Dark Down 44.5 137.7 Up 08:52:19 - 09:22:19 1980
Patrick 09:07:19 -62.3 Dark Down 44.7 138.7 Up 08:52:19 - 09:22:19 1965
Mohave Valley 09:07:19 -63.0 Dark Down 44.7 137.6 Up 08:52:19 - 09:22:19 1964
Kingman/Dolan Springs 09:07:19 -62.5 Dark Down 44.8 138.4 Up 08:52:19 - 09:22:19 1960
Idyllwild 09:07:56 -65.0 Dark Down 44.4 134.5 Up 08:52:56 - 09:22:56 1955
Niwot 09:06:13 -54.3 Dark Down 44.6 152.0 Up 08:51:13 - 09:21:13 1940
SwRI 09:06:14 -54.4 Dark Down 44.7 151.8 Up 08:51:14 - 09:21:14 1936
Lake Havasu City 09:07:19 -63.0 Dark Down 45.1 137.6 Up 08:52:19 - 09:22:19 1930
DCO 09:07:19 -61.9 Dark Down 45.3 139.4 Up 08:52:19 - 09:22:19 1918
Parker 09:07:19 -63.1 Dark Down 45.4 137.4 Up 08:52:19 - 09:22:19 1909
Blythe 09:07:19 -63.6 Dark Down 45.6 136.7 Up 08:52:19 - 09:22:19 1894
Calipatria 09:07:53 -64.4 Dark Down 45.5 135.4 Up 08:52:53 - 09:22:53 1870
Yuma 09:07:19 -64.0 Dark Down 46.3 136.0 Up 08:52:19 - 09:22:19 1847
George/Scottsdale 09:07:19 -61.4 Dark Down 47.1 140.0 Up 08:52:19 - 09:22:19 1777

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 11QY100, (2025/11/22 09:07UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.1 -16:43:22 -1.5 18.75 131
Alhena         06:37:42.8 +16:23:57  1.9 22.18 160
PPM 190211     07:22:18.6 -02:58:45  6.5  2.40 139
PPM 176968     07:30:45.8 -01:07:17  8.4  0.50 139
PPM 176962     07:29:53.7 -01:29:54  9.7  0.13 138
11QY100        07:30:12.3 -01:36:15 15.9       138
Positions are for J2000

Event circumstances last updated at 2020/01/07 23:21:26 UT

Marc W. Buie, Southwest Research Institute

RECON