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 09:05:33 UTC

J2000 position of star is 07:30:12.3 -01:36:15
Equinox of date position of star is 07:31:15.8 -01:38:57
Stellar brightness G=15.9, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=21.5

[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 226 seconds.
The 1-sigma cross-track error in the shadow position is 1166 km.
The sky-plane scale is 14563.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.2
Diameter=135.5 km assuming a 5% albedo -- 11.5 sec chord
Diameter=55.3 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 11QY100, (2025/11/22 09:06UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:17.5 -16:45:06 -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 4.0 sigma about the mid-time.
The median site spacing is 12.2 km RECON observability=1.0 and success probability=20.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 09:05:33 -58.8 Dark Down 30.1 134.7 Up 08:50:33 - 09:20:33 1843
Clarence Fulton 09:05:04 -55.9 Dark Down 30.6 139.5 Up 08:50:04 - 09:20:04 1802
Peachland 09:05:08 -56.5 Dark Down 30.8 138.9 Up 08:50:08 - 09:20:08 1795
Kelowna 09:05:06 -56.3 Dark Down 30.8 139.2 Up 08:50:06 - 09:20:06 1791
Summerland 09:05:09 -56.6 Dark Down 30.9 138.9 Up 08:50:09 - 09:20:09 1787
Penticton 09:05:09 -56.6 Dark Down 31.0 139.0 Up 08:50:09 - 09:20:09 1781
Oliver 09:05:11 -56.8 Dark Down 31.3 138.9 Up 08:50:11 - 09:20:11 1767
Anarchist Mountain Observatory 09:05:11 -56.9 Dark Down 31.5 139.0 Up 08:50:11 - 09:20:11 1756
Tonasket 09:05:13 -57.2 Dark Down 31.7 138.8 Up 08:50:13 - 09:20:13 1744
Okanogan 09:05:16 -57.5 Dark Down 31.9 138.6 Up 08:50:16 - 09:20:16 1735
Manson/Chelan 09:05:23 -58.1 Dark Down 32.0 137.8 Up 08:50:23 - 09:20:23 1730
Brewster 09:05:19 -57.8 Dark Down 32.0 138.2 Up 08:50:19 - 09:20:19 1729
Entiat 09:05:24 -58.3 Dark Down 32.1 137.6 Up 08:50:24 - 09:20:24 1723
Wenatchee 09:05:26 -58.5 Dark Down 32.3 137.4 Up 08:50:26 - 09:20:26 1715
Ellensburg 09:05:29 -59.0 Dark Down 32.5 137.0 Up 08:50:29 - 09:20:29 1704
Yakima 09:05:32 -59.3 Dark Down 32.8 136.8 Up 08:50:32 - 09:20:32 1686
Toppenish/White Swan 09:05:33 -59.4 Dark Down 33.0 136.9 Up 08:50:33 - 09:20:33 1672
Goldendale 09:05:38 -60.0 Dark Down 33.2 136.2 Up 08:50:38 - 09:20:38 1660
The Dalles 09:05:41 -60.3 Dark Down 33.2 135.8 Up 08:50:41 - 09:20:41 1660
Maupin 09:05:43 -60.6 Dark Down 33.6 135.7 Up 08:50:43 - 09:20:43 1638
Pasco 09:05:28 -58.9 Dark Down 33.7 138.2 Up 08:50:28 - 09:20:28 1630
PNWRO 09:05:29 -59.0 Dark Down 34.0 138.3 Up 08:50:29 - 09:20:29 1612
Sisters 09:05:53 -61.5 Dark Down 34.0 134.8 Up 08:50:53 - 09:20:53 1612
Redmond 09:05:49 -61.3 Dark Down 34.2 135.2 Up 08:50:49 - 09:20:49 1599
Bend 09:05:52 -61.6 Dark Down 34.3 135.0 Up 08:50:52 - 09:20:52 1593
Oregon Observatory 09:05:54 -61.8 Dark Down 34.3 134.8 Up 08:50:54 - 09:20:54 1588
La Pine/Gilchrist 09:05:55 -61.9 Dark Down 34.5 134.6 Up 08:50:55 - 09:20:55 1580
North Lake 09:05:55 -62.0 Dark Down 35.1 135.0 Up 08:50:55 - 09:20:55 1542
Klamath Falls 09:06:06 -63.2 Dark Down 35.3 133.6 Up 08:51:06 - 09:21:06 1517
Paisley 09:05:56 -62.2 Dark Down 35.7 135.1 Up 08:50:56 - 09:20:56 1503
Lakeview 09:06:00 -62.5 Dark Down 36.1 135.1 Up 08:51:00 - 09:21:00 1472
Fall River/Burney 09:06:12 -63.8 Dark Down 36.4 133.4 Up 08:51:12 - 09:21:12 1445
Cedarville 09:06:02 -62.9 Dark Down 36.7 134.9 Up 08:51:02 - 09:21:02 1433
Susanville 09:06:12 -63.9 Dark Down 37.2 133.9 Up 08:51:12 - 09:21:12 1388
Greenville 09:06:16 -64.3 Dark Down 37.3 133.4 Up 08:51:16 - 09:21:16 1383
Gimple 09:06:15 -64.2 Dark Down 37.3 133.5 Up 08:51:15 - 09:21:15 1380
Quincy 09:06:16 -64.4 Dark Down 37.4 133.3 Up 08:51:16 - 09:21:16 1372
Portola 09:06:16 -64.2 Dark Down 37.8 133.7 Up 08:51:16 - 09:21:16 1350
Reno 09:06:12 -64.0 Dark Down 38.3 134.3 Up 08:51:12 - 09:21:12 1315
Carson City 09:06:15 -64.3 Dark Down 38.6 134.1 Up 08:51:15 - 09:21:15 1294
Gardnerville 09:06:17 -64.4 Dark Down 38.8 134.0 Up 08:51:17 - 09:21:17 1279
Yerington 09:06:13 -64.0 Dark Down 39.0 134.7 Up 08:51:13 - 09:21:13 1263
Hawthorne 09:06:14 -64.0 Dark Down 39.7 135.0 Up 08:51:14 - 09:21:14 1219
Lee Vining 09:06:18 -64.6 Dark Down 39.8 134.1 Up 08:51:18 - 09:21:18 1203
Tonopah 09:06:08 -63.4 Dark Down 40.8 136.2 Up 08:51:08 - 09:21:08 1145
Bishop 09:06:18 -64.6 Dark Down 40.6 134.5 Up 08:51:18 - 09:21:18 1143
CPSLO 09:06:44 -67.2 Dark Down 40.7 130.9 Up 08:51:44 - 09:21:44 1094
Beatty 09:06:12 -63.8 Dark Down 41.9 136.0 Up 08:51:12 - 09:21:12 1059
Indian Springs 09:06:08 -63.2 Dark Down 42.7 137.0 Up 08:51:08 - 09:21:08 1002
Wildwood 09:06:39 -66.4 Dark Down 42.8 132.3 Up 08:51:39 - 09:21:39 948
Henderson 09:06:07 -63.0 Dark Down 43.5 137.5 Up 08:51:07 - 09:21:07 944
Searchlight/Boulder City 09:06:11 -63.2 Dark Down 43.9 137.2 Up 08:51:11 - 09:21:11 906
Laughlin/Bullhead City 09:06:10 -63.1 Dark Down 44.3 137.4 Up 08:51:10 - 09:21:10 874
Patrick 09:06:05 -62.5 Dark Down 44.5 138.4 Up 08:51:05 - 09:21:05 865
Idyllwild 09:06:31 -65.3 Dark Down 44.2 134.1 Up 08:51:31 - 09:21:31 859
Kingman/Dolan Springs 09:06:07 -62.7 Dark Down 44.6 138.0 Up 08:51:07 - 09:21:07 857
Mohave Valley 09:06:12 -63.2 Dark Down 44.5 137.2 Up 08:51:12 - 09:21:12 856
Niwot 09:04:48 -54.5 Dark Down 44.5 151.5 Up 08:49:48 - 09:19:48 844
SwRI 09:04:49 -54.6 Dark Down 44.5 151.3 Up 08:49:49 - 09:19:49 841
Lake Havasu City 09:06:13 -63.2 Dark Down 45.0 137.3 Up 08:51:13 - 09:21:13 821
DCO 09:06:02 -62.1 Dark Down 45.1 139.0 Up 08:51:02 - 09:21:02 819
Parker 09:06:14 -63.3 Dark Down 45.2 137.1 Up 08:51:14 - 09:21:14 797
Calipatria 09:06:27 -64.6 Dark Down 45.3 135.0 Up 08:51:27 - 09:21:27 775
Blythe 09:06:19 -63.8 Dark Down 45.5 136.4 Up 08:51:19 - 09:21:19 773
Yuma 09:06:24 -64.1 Dark Down 46.1 135.7 Up 08:51:24 - 09:21:24 713
George/Scottsdale 09:06:02 -61.7 Dark Down 46.9 139.6 Up 08:51:02 - 09:21:02 679

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 09:06UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.1 -16:43:23 -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 2020/11/20 02:19:32 UT

Marc W. Buie, Southwest Research Institute

RECON