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 09:06:56 UTC

J2000 position of star is 07:30:12.3 -01:36:15
Equinox of date position of star is 07:31:13.9 -01:38:52
Stellar brightness G=15.9, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=23.3

[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 319 seconds.
The 1-sigma cross-track error in the shadow position is 1657 km.
The sky-plane scale is 14563.6 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=134.3 km assuming a 5% albedo -- 5.1 sec chord
Diameter=54.8 km assuming a 30% albedo -- 2.1 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 2.8 sigma about the mid-time.
The median site spacing is 12.4 km RECON observability=1.0 and success probability=12.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 09:06:58 -58.6 Dark Down 30.2 135.1 Up 08:51:58 - 09:21:58 2786
Clarence Fulton 09:06:27 -55.8 Dark Down 30.7 139.9 Up 08:51:27 - 09:21:27 2744
Peachland 09:06:32 -56.3 Dark Down 30.9 139.3 Up 08:51:32 - 09:21:32 2737
Kelowna 09:06:31 -56.1 Dark Down 30.9 139.6 Up 08:51:31 - 09:21:31 2733
Summerland 09:06:33 -56.4 Dark Down 31.1 139.3 Up 08:51:33 - 09:21:33 2729
Penticton 09:06:33 -56.4 Dark Down 31.2 139.4 Up 08:51:33 - 09:21:33 2723
Oliver 09:06:35 -56.7 Dark Down 31.4 139.3 Up 08:51:35 - 09:21:35 2709
Anarchist Mountain Observatory 09:06:36 -56.8 Dark Down 31.6 139.4 Up 08:51:36 - 09:21:36 2697
Tonasket 09:06:38 -57.0 Dark Down 31.9 139.2 Up 08:51:38 - 09:21:38 2686
Okanogan 09:06:42 -57.4 Dark Down 32.0 138.9 Up 08:51:42 - 09:21:42 2676
Manson/Chelan 09:06:46 -58.0 Dark Down 32.2 138.1 Up 08:51:46 - 09:21:46 2672
Brewster 09:06:44 -57.7 Dark Down 32.2 138.6 Up 08:51:44 - 09:21:44 2670
Entiat 09:06:48 -58.2 Dark Down 32.3 138.0 Up 08:51:48 - 09:21:48 2664
Wenatchee 09:06:49 -58.4 Dark Down 32.4 137.8 Up 08:51:49 - 09:21:49 2656
Ellensburg 09:06:53 -58.8 Dark Down 32.7 137.4 Up 08:51:53 - 09:21:53 2645
Yakima 09:06:56 -59.1 Dark Down 33.0 137.2 Up 08:51:56 - 09:21:56 2628
Toppenish/White Swan 09:06:58 -59.2 Dark Down 33.2 137.3 Up 08:51:58 - 09:21:58 2613
Goldendale 09:07:01 -59.8 Dark Down 33.4 136.6 Up 08:52:01 - 09:22:01 2601
The Dalles 09:07:05 -60.2 Dark Down 33.4 136.1 Up 08:52:05 - 09:22:05 2601
Maupin 09:07:07 -60.5 Dark Down 33.8 136.1 Up 08:52:07 - 09:22:07 2579
Pasco 09:06:51 -58.8 Dark Down 33.9 138.6 Up 08:51:51 - 09:21:51 2571
PNWRO 09:06:51 -58.9 Dark Down 34.2 138.7 Up 08:51:51 - 09:21:51 2553
Sisters 09:07:16 -61.3 Dark Down 34.2 135.2 Up 08:52:16 - 09:22:16 2552
Redmond 09:07:13 -61.2 Dark Down 34.4 135.6 Up 08:52:13 - 09:22:13 2540
Bend 09:07:16 -61.4 Dark Down 34.5 135.3 Up 08:52:16 - 09:22:16 2534
Oregon Observatory 09:07:19 -61.6 Dark Down 34.5 135.1 Up 08:52:19 - 09:22:19 2529
La Pine/Gilchrist 09:07:18 -61.8 Dark Down 34.6 135.0 Up 08:52:18 - 09:22:18 2521
North Lake 09:07:18 -61.8 Dark Down 35.3 135.4 Up 08:52:18 - 09:22:18 2482
Klamath Falls 09:07:19 -63.0 Dark Down 35.5 133.9 Up 08:52:19 - 09:22:19 2461
Paisley 09:07:19 -62.1 Dark Down 35.8 135.5 Up 08:52:19 - 09:22:19 2444
Lakeview 09:07:19 -62.3 Dark Down 36.3 135.4 Up 08:52:19 - 09:22:19 2413
Fall River/Burney 09:07:19 -63.7 Dark Down 36.5 133.7 Up 08:52:19 - 09:22:19 2393
Cedarville 09:07:19 -62.7 Dark Down 36.9 135.3 Up 08:52:19 - 09:22:19 2375
Susanville 09:07:19 -63.8 Dark Down 37.4 134.2 Up 08:52:19 - 09:22:19 2337
Greenville 09:07:19 -64.1 Dark Down 37.4 133.7 Up 08:52:19 - 09:22:19 2335
Gimple 09:07:19 -64.1 Dark Down 37.5 133.8 Up 08:52:19 - 09:22:19 2332
Quincy 09:07:19 -64.3 Dark Down 37.5 133.6 Up 08:52:19 - 09:22:19 2326
Portola 09:07:19 -64.1 Dark Down 37.9 134.0 Up 08:52:19 - 09:22:19 2302
Reno 09:07:19 -63.9 Dark Down 38.4 134.6 Up 08:52:19 - 09:22:19 2265
Carson City 09:07:19 -64.1 Dark Down 38.7 134.4 Up 08:52:19 - 09:22:19 2247
Gardnerville 09:07:19 -64.2 Dark Down 38.9 134.3 Up 08:52:19 - 09:22:19 2233
Yerington 09:07:19 -63.9 Dark Down 39.2 135.0 Up 08:52:19 - 09:22:19 2213
Hawthorne 09:07:19 -63.8 Dark Down 39.8 135.3 Up 08:52:19 - 09:22:19 2169
Lee Vining 09:07:19 -64.5 Dark Down 39.9 134.4 Up 08:52:19 - 09:22:19 2161
Bishop 09:07:19 -64.4 Dark Down 40.8 134.8 Up 08:52:19 - 09:22:19 2101
Tonopah 09:07:19 -63.2 Dark Down 40.9 136.5 Up 08:52:19 - 09:22:19 2090
CPSLO 09:08:07 -66.9 Dark Down 41.0 131.3 Up 08:53:07 - 09:23:07 2033
Beatty 09:07:19 -63.6 Dark Down 42.0 136.3 Up 08:52:19 - 09:22:19 2009
Indian Springs 09:07:19 -63.0 Dark Down 42.8 137.4 Up 08:52:19 - 09:22:19 1947
Henderson 09:07:19 -62.8 Dark Down 43.6 137.8 Up 08:52:19 - 09:22:19 1888
Wildwood 09:08:03 -66.2 Dark Down 43.0 132.7 Up 08:53:03 - 09:23:03 1887
Searchlight/Boulder City 09:07:19 -63.0 Dark Down 44.1 137.5 Up 08:52:19 - 09:22:19 1853
Laughlin/Bullhead City 09:07:19 -62.9 Dark Down 44.5 137.7 Up 08:52:19 - 09:22:19 1821
Patrick 09:07:19 -62.3 Dark Down 44.7 138.7 Up 08:52:19 - 09:22:19 1806
Mohave Valley 09:07:19 -63.0 Dark Down 44.7 137.6 Up 08:52:19 - 09:22:19 1805
Kingman/Dolan Springs 09:07:19 -62.5 Dark Down 44.8 138.4 Up 08:52:19 - 09:22:19 1801
Idyllwild 09:07:55 -65.0 Dark Down 44.4 134.5 Up 08:52:55 - 09:22:55 1797
Niwot 09:06:11 -54.3 Dark Down 44.6 152.0 Up 08:51:11 - 09:21:11 1783
SwRI 09:06:14 -54.4 Dark Down 44.7 151.8 Up 08:51:14 - 09:21:14 1779
Lake Havasu City 09:07:19 -63.0 Dark Down 45.1 137.6 Up 08:52:19 - 09:22:19 1771
DCO 09:07:19 -61.9 Dark Down 45.3 139.4 Up 08:52:19 - 09:22:19 1759
Calipatria 09:07:19 -64.5 Dark Down 45.4 135.2 Up 08:52:19 - 09:22:19 1756
Parker 09:07:19 -63.1 Dark Down 45.4 137.4 Up 08:52:19 - 09:22:19 1750
Blythe 09:07:19 -63.6 Dark Down 45.6 136.7 Up 08:52:19 - 09:22:19 1735
Yuma 09:07:19 -64.0 Dark Down 46.3 136.0 Up 08:52:19 - 09:22:19 1688
George/Scottsdale 09:07:19 -61.4 Dark Down 47.1 140.0 Up 08:52:19 - 09:22:19 1618

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 2020/03/29 21:00:57 UT

Marc W. Buie, Southwest Research Institute

RECON