RECON: TNO occultation with 11QY100

Event between 11QY100 and star GA0860:02114558 with event index number of 1587074

Geocentric closest approach at 2025/01/11 09:50:56 UTC

J2000 position of star is 07:02:30.7 -02:08:58
Equinox of date position of star is 07:03:31.3 -02:10:47
Stellar brightness G=15.8, use SENSEUP=128
Star is 40 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=21.4

[RECON map]
TNO is 20.3 AU from the Sun and 19.4 AU from the Earth.
The TNO is moving 21.6 km/sec on the sky relative to the star, or, 5.5 arcsec/hr.
The 1-sigma error in the time of the event is 144 seconds.
The 1-sigma cross-track error in the shadow position is 1247 km.
The sky-plane scale is 14067.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=134.9 km assuming a 5% albedo -- 6.2 sec chord
Diameter=55.1 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 11QY100, (2025/01/11 09:51UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:15.2 -16:45:01 -1.5 15.19  50
2Bet CMa       06:23:48.1 -17:58:12  2.0 18.58  49
PPM 189689     06:56:14.3 -02:50:13  6.0  1.99  40
PPM 176634     07:04:13.4 -02:04:09  8.5  0.16  40
PPM 176625     07:03:37.0 -02:12:22  9.5  0.04  40
11QY100        07:03:46.5 -02:11:14 15.8        40
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 17.2 km RECON observability=1.0 and success probability=14.1%
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 09:50:10 -54.8 Dark Up 30.2 220.0 Up 09:37:43 - 10:02:38 2486
Kelowna 09:50:10 -55.2 Dark Up 30.5 219.9 Up 09:37:43 - 10:02:38 2463
Summerland 09:50:09 -55.5 Dark Up 30.8 219.8 Up 09:37:42 - 10:02:37 2445
Penticton 09:50:09 -55.4 Dark Up 30.8 220.0 Up 09:37:42 - 10:02:37 2443
Oliver 09:50:09 -55.7 Dark Up 31.1 220.1 Up 09:37:41 - 10:02:36 2423
Anarchist Mountain Observatory 09:50:08 -55.7 Dark Up 31.1 220.4 Up 09:37:40 - 10:02:35 2417
Tonasket 09:50:07 -56.0 Dark Up 31.4 220.4 Up 09:37:39 - 10:02:34 2397
Okanogan 09:50:06 -56.3 Dark Up 31.7 220.4 Up 09:37:38 - 10:02:33 2376
Brewster 09:50:06 -56.6 Dark Up 32.0 220.3 Up 09:37:38 - 10:02:33 2357
Manson/Chelan 09:50:07 -56.9 Dark Up 32.3 220.0 Up 09:37:39 - 10:02:34 2340
Victoria 09:50:17 -57.9 Dark Up 33.2 216.2 Up 09:37:50 - 10:02:45 2332
Entiat 09:50:06 -57.1 Dark Up 32.5 220.0 Up 09:37:39 - 10:02:34 2326
Wenatchee 09:50:06 -57.3 Dark Up 32.8 220.0 Up 09:37:38 - 10:02:33 2309
Ellensburg 09:50:05 -57.7 Dark Up 33.2 219.9 Up 09:37:38 - 10:02:33 2282
Yakima 09:50:04 -58.0 Dark Up 33.5 220.1 Up 09:37:37 - 10:02:32 2256
Pasco 09:49:59 -57.5 Dark Up 33.1 221.7 Up 09:37:31 - 10:02:26 2256
Toppenish/White Swan 09:50:03 -58.0 Dark Up 33.6 220.3 Up 09:37:35 - 10:02:30 2245
PNWRO 09:49:58 -57.5 Dark Up 33.2 222.1 Up 09:37:30 - 10:02:25 2244
Goldendale 09:50:03 -58.6 Dark Up 34.2 220.1 Up 09:37:35 - 10:02:30 2205
The Dalles 09:50:03 -59.0 Dark Up 34.5 219.8 Up 09:37:36 - 10:02:31 2186
Maupin 09:50:02 -59.2 Dark Up 34.8 220.1 Up 09:37:34 - 10:02:29 2161
Redmond 09:50:00 -59.8 Dark Up 35.6 220.4 Up 09:37:32 - 10:02:27 2102
Sisters 09:50:01 -60.0 Dark Up 35.7 220.0 Up 09:37:34 - 10:02:29 2097
Bend 09:50:00 -60.0 Dark Up 35.8 220.4 Up 09:37:32 - 10:02:27 2086
Oregon Observatory 09:50:00 -60.2 Dark Up 36.0 220.3 Up 09:37:32 - 10:02:27 2073
La Pine/Gilchrist 09:49:59 -60.4 Dark Up 36.2 220.3 Up 09:37:32 - 10:02:27 2058
Niwot 09:49:02 -51.4 Dark Up 29.4 237.9 Low 09:36:35 - 10:01:30 2040
North Lake 09:49:56 -60.3 Dark Up 36.2 221.2 Up 09:37:29 - 10:02:24 2039
SwRI 09:49:02 -51.5 Dark Up 29.5 237.9 Low 09:36:34 - 10:01:29 2031
Paisley 09:49:54 -60.5 Dark Up 36.5 221.8 Up 09:37:26 - 10:02:21 2007
Lakeview 09:49:52 -60.7 Dark Up 36.7 222.3 Up 09:37:24 - 10:02:19 1976
Klamath Falls 09:49:56 -61.5 Dark Up 37.4 220.7 Up 09:37:29 - 10:02:24 1956
Cedarville 09:49:49 -61.0 Dark Up 37.1 222.8 Up 09:37:22 - 10:02:17 1934
Fall River/Burney 09:49:52 -62.0 Dark Up 38.1 221.7 Up 09:37:25 - 10:02:20 1881
Susanville 09:49:48 -61.9 Dark Up 38.2 222.9 Up 09:37:21 - 10:02:16 1848
Gimple 09:49:48 -62.2 Dark Up 38.5 222.8 Up 09:37:21 - 10:02:16 1825
Greenville 09:49:48 -62.2 Dark Up 38.6 222.7 Up 09:37:20 - 10:02:15 1824
Quincy 09:49:48 -62.3 Dark Up 38.7 222.8 Up 09:37:20 - 10:02:15 1810
Portola 09:49:46 -62.1 Dark Up 38.6 223.4 Up 09:37:18 - 10:02:13 1809
Reno 09:49:43 -61.8 Dark Up 38.4 224.2 Up 09:37:16 - 10:02:11 1800
Carson City 09:49:42 -62.0 Dark Up 38.7 224.4 Up 09:37:14 - 10:02:09 1774
Yerington 09:49:40 -61.7 Dark Up 38.5 225.2 Up 09:37:12 - 10:02:07 1770
Gardnerville 09:49:41 -62.1 Dark Up 38.8 224.6 Up 09:37:14 - 10:02:09 1757
Hawthorne 09:49:36 -61.6 Dark Up 38.5 226.0 Up 09:37:09 - 10:02:04 1744
Tonopah 09:49:31 -60.8 Dark Up 38.0 227.7 Up 09:37:03 - 10:01:58 1733
Lee Vining 09:49:37 -62.2 Dark Up 39.2 225.8 Up 09:37:09 - 10:02:04 1696
Bishop 09:49:33 -62.0 Dark Up 39.2 226.9 Up 09:37:05 - 10:02:00 1662
Beatty 09:49:26 -61.0 Dark Up 38.5 228.9 Up 09:36:59 - 10:01:54 1653
Indian Springs 09:49:22 -60.3 Dark Up 38.1 230.1 Up 09:36:54 - 10:01:49 1645
Henderson 09:49:18 -60.0 Dark Up 38.0 231.1 Up 09:36:51 - 10:01:46 1615
Patrick 09:49:13 -59.4 Dark Up 37.7 232.6 Up 09:36:45 - 10:01:40 1585
Searchlight/Boulder City 09:49:17 -60.2 Dark Up 38.3 231.5 Up 09:36:49 - 10:01:44 1573
DCO 09:49:10 -58.9 Dark Up 37.4 233.4 Up 09:36:42 - 10:01:37 1572
Kingman/Dolan Springs 09:49:13 -59.6 Dark Up 38.0 232.5 Up 09:36:45 - 10:01:40 1565
Laughlin/Bullhead City 09:49:15 -60.0 Dark Up 38.3 232.1 Up 09:36:47 - 10:01:42 1555
Mohave Valley 09:49:14 -60.1 Dark Up 38.5 232.2 Up 09:36:46 - 10:01:41 1534
Lake Havasu City 09:49:12 -60.0 Dark Up 38.6 232.7 Up 09:36:45 - 10:01:40 1507
George/Scottsdale 09:49:02 -58.3 Dark Up 37.4 235.5 Up 09:36:35 - 10:01:30 1484
Parker 09:49:10 -60.1 Dark Up 38.7 233.0 Up 09:36:43 - 10:01:38 1480
CPSLO 09:49:35 -64.5 Dark Up 41.9 225.8 Up 09:37:07 - 10:02:02 1468
Blythe 09:49:10 -60.5 Dark Up 39.3 233.0 Up 09:36:43 - 10:01:38 1434
Idyllwild 09:49:18 -62.1 Dark Up 40.6 230.9 Up 09:36:50 - 10:01:45 1411
Wildwood 09:49:25 -63.4 Dark Up 41.5 228.7 Up 09:36:57 - 10:01:52 1408
Calipatria 09:49:12 -61.3 Dark Up 40.2 232.4 Up 09:36:45 - 10:01:40 1380
Yuma 09:49:08 -60.7 Dark Up 39.8 233.6 Up 09:36:41 - 10:01:36 1360

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, (2025/01/11 09:51UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.1 -16:43:22 -1.5 15.19  50
2Bet CMa       06:22:42.0 -17:57:21  2.0 18.58  49
PPM 189689     06:54:58.9 -02:48:13  6.0  1.99  40
PPM 176634     07:02:57.6 -02:01:52  8.5  0.16  40
PPM 176625     07:02:21.3 -02:10:05  9.5  0.04  40
11QY100        07:02:30.7 -02:08:58 15.8        40
Positions are for J2000

Event circumstances last updated at 2020/01/07 23:18:22 UT

Marc W. Buie, Southwest Research Institute

RECON