RECON: TNO occultation with 11QF99

Event between 11QF99 and star GA1020:02262852 with event index number of 1642340

Geocentric closest approach at 2026/12/01 11:47:57 UTC

J2000 position of star is 06:47:10.8 +13:21:26
Equinox of date position of star is 06:48:17.4 +13:20:04
Stellar brightness G=14.6, use SENSEUP=128
Star is 61 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 16.6 AU from the Sun and 15.8 AU from the Earth.
The TNO is moving 18.2 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 661 seconds.
The 1-sigma cross-track error in the shadow position is 3102 km.
The sky-plane scale is 11440.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.8
Diameter=66.4 km assuming a 5% albedo -- 3.7 sec chord
Diameter=27.1 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 11QF99, (2026/12/01 11:48UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.8 +07:24:35  0.4 14.10  74
Alhena         06:39:16.0 +16:22:26  1.9  3.81  63
31Xi Gem       06:46:48.0 +12:51:53  3.4  0.65  61
PPM 122982     06:46:45.7 +13:18:22  7.4  0.47  61
PPM 123021     06:48:19.6 +13:15:40  9.2  0.11  61
11QF99         06:48:41.9 +13:19:34 14.6        60
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 1.4 sigma about the mid-time.
The median site spacing is 22.4 km RECON observability=1.0 and success probability=7.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:45:58 -35.8 Dark Up 47.9 218.9 Up 11:30:58 - 12:00:58 6009
Summerland 11:45:58 -36.0 Dark Up 48.2 218.7 Up 11:30:58 - 12:00:58 5982
Penticton 11:45:58 -36.0 Dark Up 48.2 218.9 Up 11:30:58 - 12:00:58 5976
Okanagan Falls 11:45:58 -36.0 Dark Up 48.4 219.0 Up 11:30:58 - 12:00:58 5958
Oliver 11:45:58 -36.0 Dark Up 48.5 219.2 Up 11:30:58 - 12:00:58 5943
Anarchist Mountain Observatory 11:45:57 -35.9 Dark Up 48.6 219.6 Up 11:30:57 - 12:00:57 5928
Oroville 11:45:57 -36.0 Dark Up 48.6 219.5 Up 11:30:57 - 12:00:57 5921
Tonasket 11:45:56 -36.0 Dark Up 48.8 219.7 Up 11:30:56 - 12:00:56 5899
Okanogan 11:45:57 -36.1 Dark Up 49.1 219.7 Up 11:30:57 - 12:00:57 5868
Brewster 11:45:57 -36.3 Dark Up 49.4 219.7 Up 11:30:57 - 12:00:57 5843
Manson/Chelan 11:45:58 -36.6 Dark Up 49.8 219.3 Up 11:30:58 - 12:00:58 5824
Wenatchee 11:45:58 -36.7 Dark Up 50.2 219.5 Up 11:30:58 - 12:00:58 5780
Ellensburg 11:45:58 -36.9 Dark Up 50.6 219.5 Up 11:30:58 - 12:00:58 5741
Yakima 11:45:58 -37.0 Dark Up 50.9 219.8 Up 11:30:58 - 12:00:58 5703
Toppenish/White Swan 11:45:57 -36.9 Dark Up 51.0 220.2 Up 11:30:57 - 12:00:57 5682
Pasco 11:45:52 -36.1 Dark Up 50.5 222.0 Up 11:30:52 - 12:00:52 5671
PNWRO 11:45:51 -35.9 Dark Up 50.6 222.5 Up 11:30:51 - 12:00:51 5647
Goldendale 11:45:58 -37.3 Dark Up 51.6 220.0 Up 11:30:58 - 12:00:58 5630
The Dalles 11:45:59 -37.5 Dark Up 52.0 219.7 Up 11:30:59 - 12:00:59 5609
Maupin 11:45:58 -37.5 Dark Up 52.2 220.2 Up 11:30:58 - 12:00:58 5569
Madras/Culver 11:45:58 -37.6 Dark Up 52.7 220.6 Up 11:30:58 - 12:00:58 5516
Sisters 11:45:59 -38.0 Dark Up 53.1 220.2 Up 11:30:59 - 12:00:59 5484
Redmond 11:45:57 -37.7 Dark Up 53.0 220.8 Up 11:30:57 - 12:00:57 5482
Bend 11:45:58 -37.8 Dark Up 53.2 220.8 Up 11:30:58 - 12:00:58 5461
Oregon Observatory 11:45:58 -37.9 Dark Up 53.4 220.8 Up 11:30:58 - 12:00:58 5444
La Pine/Gilchrist 11:45:58 -38.0 Dark Up 53.6 220.9 Up 11:30:58 - 12:00:58 5424
North Lake 11:45:55 -37.6 Dark Up 53.6 222.1 Up 11:30:55 - 12:00:55 5382
Paisley 11:45:53 -37.4 Dark Up 53.8 223.1 Up 11:30:53 - 12:00:53 5328
Chiloquin 11:45:58 -38.3 Dark Up 54.6 221.4 Up 11:30:58 - 12:00:58 5316
Klamath Falls 11:45:57 -38.3 Dark Up 54.8 221.8 Up 11:30:57 - 12:00:57 5282
Lakeview 11:45:52 -37.3 Dark Up 54.1 223.9 Up 11:30:52 - 12:00:52 5278
Tulelake 11:45:56 -38.1 Dark Up 54.9 222.5 Up 11:30:56 - 12:00:56 5256
Cedarville 11:45:50 -37.2 Dark Up 54.5 224.7 Up 11:30:50 - 12:00:50 5213
Fall River/Burney 11:45:55 -38.1 Dark Up 55.5 223.5 Up 11:30:55 - 12:00:55 5166
Susanville 11:45:51 -37.6 Dark Up 55.5 225.2 Up 11:30:51 - 12:00:51 5102
SwRI 11:44:50 -26.0 Dark Up 46.4 243.7 Up 11:29:50 - 11:59:50 5100
Greenville 11:45:52 -37.8 Dark Up 55.9 225.1 Up 11:30:52 - 12:00:52 5075
Gimple 11:45:52 -37.8 Dark Up 55.9 225.2 Up 11:30:52 - 12:00:52 5075
Quincy 11:45:52 -37.8 Dark Up 56.0 225.3 Up 11:30:52 - 12:00:52 5055
Portola 11:45:49 -37.5 Dark Up 55.9 226.1 Up 11:30:49 - 12:00:49 5042
Reno 11:45:47 -37.0 Dark Up 55.7 227.3 Up 11:30:47 - 12:00:47 5015
Carson City 11:45:46 -37.0 Dark Up 55.9 227.7 Up 11:30:46 - 12:00:46 4979
Yerington 11:45:43 -36.5 Dark Up 55.7 228.8 Up 11:30:43 - 12:00:43 4959
Gardnerville 11:45:46 -36.9 Dark Up 56.1 228.0 Up 11:30:46 - 12:00:46 4954
Hawthorne 11:45:40 -36.1 Dark Up 55.7 230.0 Up 11:30:40 - 12:00:40 4912
Tonopah 11:45:34 -35.0 Dark Up 55.1 232.4 Up 11:30:34 - 12:00:34 4866
Lee Vining 11:45:42 -36.5 Dark Up 56.3 230.0 Up 11:30:42 - 12:00:42 4855
Bishop 11:45:38 -35.9 Dark Up 56.3 231.6 Up 11:30:38 - 12:00:38 4794
Beatty 11:45:31 -34.6 Dark Up 55.5 234.3 Up 11:30:31 - 12:00:31 4748
Lone Pine 11:45:36 -35.6 Dark Up 56.5 233.0 Up 11:30:36 - 12:00:36 4716
Indian Springs 11:45:26 -33.7 Dark Up 55.0 236.0 Up 11:30:26 - 12:00:26 4716
Henderson 11:45:23 -33.1 Dark Up 54.9 237.5 Up 11:30:23 - 12:00:23 4662
Searchlight/Boulder City 11:45:21 -33.0 Dark Up 55.1 238.2 Up 11:30:21 - 12:00:21 4603
Patrick 11:45:16 -32.2 Dark Up 54.4 239.5 Up 11:30:16 - 12:00:16 4600
CPSLO 11:45:46 -37.6 Dark Up 59.0 231.1 Up 11:30:46 - 12:00:46 4581
Kingman/Dolan Springs 11:45:17 -32.3 Dark Up 54.7 239.6 Up 11:30:17 - 12:00:17 4576
Laughlin/Bullhead City 11:45:19 -32.7 Dark Up 55.1 239.0 Up 11:30:19 - 12:00:19 4573
Mohave Valley 11:45:19 -32.7 Dark Up 55.2 239.4 Up 11:30:19 - 12:00:19 4544
Lake Havasu City 11:45:17 -32.5 Dark Up 55.2 240.1 Up 11:30:17 - 12:00:17 4503
Parker 11:45:17 -32.4 Dark Up 55.4 240.6 Up 11:30:17 - 12:00:17 4467
Wildwood 11:45:37 -35.9 Dark Up 58.4 235.5 Up 11:30:37 - 12:00:37 4456
George/Scottsdale 11:45:06 -30.4 Dark Up 53.8 243.8 Up 11:30:06 - 12:00:06 4429
Idyllwild 11:45:27 -34.4 Dark Up 57.3 238.3 Up 11:30:27 - 12:00:27 4420
Blythe 11:45:18 -32.6 Dark Up 55.8 240.9 Up 11:30:18 - 12:00:18 4411
Calipatria 11:45:21 -33.3 Dark Up 56.8 240.5 Up 11:30:21 - 12:00:21 4357
Yuma 11:45:17 -32.5 Dark Up 56.3 242.1 Up 11:30:17 - 12:00:17 4314

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 11QF99, (2026/12/01 11:48UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.10  74
Alhena         06:37:42.8 +16:23:57  1.9  3.81  63
31Xi Gem       06:45:17.2 +12:53:40  3.4  0.65  61
PPM 122982     06:45:14.6 +13:20:09  7.4  0.47  61
PPM 123021     06:46:48.5 +13:17:31  9.2  0.11  61
11QF99         06:47:10.8 +13:21:26 14.6        61
Positions are for J2000

Event circumstances last updated at 2019/09/01 22:44:42 UT

Marc W. Buie, Southwest Research Institute

RECON