RECON: TNO occultation with 14UU228

Event between 14UU228 and star GA1100:00489411 with event index number of 1707818

Geocentric closest approach at 2026/12/15 08:37:33 UTC

J2000 position of star is 03:59:21.3 +21:18:02
Equinox of date position of star is 04:00:32.7 +21:21:26
Stellar brightness G=14.2, use SENSEUP=64
Star is 90 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=24.5

[RECON map]
TNO is 27.9 AU from the Sun and 27.0 AU from the Earth.
The TNO is moving 21.8 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 701 seconds.
The 1-sigma cross-track error in the shadow position is 3450 km.
The sky-plane scale is 19596.6 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=66.1 km assuming a 5% albedo -- 2.8 sec chord
Diameter=27.0 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 14UU228, (2026/12/15 08:38UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.2 +16:33:42  0.8  9.88  98
44Zet Per      03:55:50.0 +31:57:41  2.8 10.65  91
32 Tau         03:58:27.9 +22:33:13  5.6  1.31  90
PPM 093159     04:02:15.2 +20:29:14  8.4  0.94  90
PPM 093127     04:00:11.2 +21:13:25 10.0  0.23  90
14UU228        04:00:56.4 +21:22:32 14.2        90
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 1.3 sigma about the mid-time.
The median site spacing is 24.3 km RECON observability=1.0 and success probability=14.9%
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 08:35:19 -61.7 Dark Down 50.8 234.9 Up 08:20:19 - 08:50:19 280
Kelowna 08:35:19 -62.1 Dark Down 51.1 235.1 Up 08:20:19 - 08:50:19 241
Peachland 08:35:19 -62.3 Dark Down 51.3 234.8 Up 08:20:19 - 08:50:19 230
Summerland 08:35:19 -62.4 Dark Down 51.4 235.1 Up 08:20:19 - 08:50:19 215
Penticton 08:35:18 -62.5 Dark Down 51.3 235.3 Up 08:20:18 - 08:50:18 208
Oliver 08:35:18 -62.8 Dark Down 51.5 235.7 Up 08:20:18 - 08:50:18 172
Anarchist Mountain Observatory 08:35:17 -62.9 Dark Down 51.5 236.1 Up 08:20:17 - 08:50:17 155
Tonasket 08:35:17 -63.2 Dark Down 51.7 236.3 Up 08:20:17 - 08:50:17 123
Victoria 08:35:29 -64.2 Dark Down 54.0 231.5 Up 08:20:29 - 08:50:29 107
Okanogan 08:35:17 -63.6 Dark Down 52.0 236.5 Up 08:20:17 - 08:50:17 89
Brewster 08:35:18 -63.9 Dark Down 52.3 236.5 Up 08:20:18 - 08:50:18 61
Manson/Chelan 08:35:19 -64.2 Dark Down 52.6 236.3 Up 08:20:19 - 08:50:19 40
Entiat 08:35:19 -64.4 Dark Down 52.8 236.5 Up 08:20:19 - 08:50:19 17
Wenatchee 08:35:19 -64.6 Dark Down 53.0 236.6 Up 08:20:19 - 08:50:19 -9
Ellensburg 08:35:19 -65.1 Dark Down 53.3 236.8 Up 08:20:19 - 08:50:19 -51
Yakima 08:35:19 -65.5 Dark Down 53.5 237.2 Up 08:20:19 - 08:50:19 -93
Toppenish/White Swan 08:35:18 -65.6 Dark Down 53.6 237.7 Up 08:20:18 - 08:50:18 -116
Pasco 08:35:14 -65.4 Dark Down 52.9 239.4 Up 08:20:14 - 08:50:14 -128
PNWRO 08:35:13 -65.5 Dark Down 52.9 239.9 Up 08:20:13 - 08:50:13 -153
Goldendale 08:35:19 -66.2 Dark Down 54.1 237.8 Up 08:20:19 - 08:50:19 -173
The Dalles 08:35:20 -66.5 Dark Down 54.4 237.6 Up 08:20:20 - 08:50:20 -196
Maupin 08:35:19 -66.9 Dark Down 54.6 238.3 Up 08:20:19 - 08:50:19 -240
Sisters 08:35:20 -67.9 Dark Down 55.4 238.7 Up 08:20:20 - 08:50:20 -331
Redmond 08:35:18 -67.8 Dark Down 55.1 239.2 Up 08:20:18 - 08:50:18 -334
Bend 08:35:19 -68.0 Dark Down 55.3 239.3 Up 08:20:19 - 08:50:19 -356
Oregon Observatory 08:35:19 -68.2 Dark Down 55.5 239.4 Up 08:20:19 - 08:50:19 -374
La Pine/Gilchrist 08:35:19 -68.4 Dark Down 55.6 239.6 Up 08:20:19 - 08:50:19 -396
North Lake 08:35:17 -68.6 Dark Down 55.5 240.8 Up 08:20:17 - 08:50:17 -442
Paisley 08:35:15 -69.0 Dark Down 55.5 242.0 Up 08:20:15 - 08:50:15 -500
Klamath Falls 08:35:19 -69.8 Dark Down 56.5 241.1 Up 08:20:19 - 08:50:19 -549
Lakeview 08:35:14 -69.4 Dark Down 55.6 242.9 Up 08:20:14 - 08:50:14 -554
Cedarville 08:35:13 -70.0 Dark Down 55.8 243.9 Up 08:20:13 - 08:50:13 -624
Fall River/Burney 08:35:17 -70.8 Dark Down 56.8 243.2 Up 08:20:17 - 08:50:17 -675
Niwot 08:34:26 -63.2 Dark Down 45.6 259.6 Up 08:19:26 - 08:49:26 -706
SwRI 08:34:26 -63.4 Dark Down 45.7 259.6 Up 08:19:26 - 08:49:26 -718
Susanville 08:35:14 -71.1 Dark Down 56.6 244.9 Up 08:20:14 - 08:50:14 -743
Greenville 08:35:15 -71.5 Dark Down 56.9 244.9 Up 08:20:15 - 08:50:15 -772
Gimple 08:35:15 -71.4 Dark Down 56.9 245.0 Up 08:20:15 - 08:50:15 -772
Quincy 08:35:15 -71.6 Dark Down 57.0 245.2 Up 08:20:15 - 08:50:15 -794
Portola 08:35:13 -71.6 Dark Down 56.7 245.9 Up 08:20:13 - 08:50:13 -807
Reno 08:35:11 -71.6 Dark Down 56.4 247.0 Up 08:20:11 - 08:50:11 -836
Carson City 08:35:10 -71.9 Dark Down 56.5 247.5 Up 08:20:10 - 08:50:10 -874
Yerington 08:35:08 -71.8 Dark Down 56.1 248.4 Up 08:20:08 - 08:50:08 -895
Gardnerville 08:35:10 -72.1 Dark Down 56.6 247.9 Up 08:20:10 - 08:50:10 -901
Hawthorne 08:35:06 -71.9 Dark Down 55.9 249.6 Up 08:20:06 - 08:50:06 -945
Tonopah 08:35:01 -71.6 Dark Down 55.0 251.7 Up 08:20:01 - 08:50:01 -993
Lee Vining 08:35:07 -72.6 Dark Down 56.5 249.9 Up 08:20:07 - 08:50:07 -1006
Bishop 08:35:04 -72.7 Dark Down 56.1 251.5 Up 08:20:04 - 08:50:04 -1070
Beatty 08:34:59 -72.2 Dark Down 55.0 253.7 Up 08:19:59 - 08:49:59 -1118
Indian Springs 08:34:55 -71.9 Dark Down 54.3 255.1 Up 08:19:55 - 08:49:55 -1150
Henderson 08:34:52 -71.8 Dark Down 53.9 256.4 Up 08:19:52 - 08:49:52 -1206
Searchlight/Boulder City 08:34:51 -72.1 Dark Down 54.0 257.2 Up 08:19:51 - 08:49:51 -1268
Patrick 08:34:48 -71.5 Dark Down 53.2 258.1 Up 08:19:48 - 08:49:48 -1270
Kingman/Dolan Springs 08:34:48 -71.8 Dark Down 53.4 258.3 Up 08:19:48 - 08:49:48 -1295
CPSLO 08:35:11 -75.5 Dark Down 58.5 252.3 Up 08:20:11 - 08:50:11 -1295
Laughlin/Bullhead City 08:34:50 -72.1 Dark Down 53.8 257.9 Up 08:19:50 - 08:49:50 -1300
DCO 08:34:45 -71.2 Dark Down 52.7 259.1 Up 08:19:45 - 08:49:45 -1301
Mohave Valley 08:34:50 -72.3 Dark Down 53.8 258.2 Up 08:19:50 - 08:49:50 -1330
Lake Havasu City 08:34:49 -72.3 Dark Down 53.7 259.0 Up 08:19:49 - 08:49:49 -1372
Parker 08:34:49 -72.5 Dark Down 53.8 259.5 Up 08:19:49 - 08:49:49 -1411
Wildwood 08:35:04 -75.3 Dark Down 57.2 256.1 Up 08:20:04 - 08:50:04 -1427
George/Scottsdale 08:34:40 -71.1 Dark Down 51.9 261.8 Up 08:19:40 - 08:49:40 -1446
Idyllwild 08:34:57 -74.4 Dark Down 55.8 258.2 Up 08:19:57 - 08:49:57 -1463
Blythe 08:34:49 -73.0 Dark Down 54.1 260.0 Up 08:19:49 - 08:49:49 -1469
Calipatria 08:34:52 -73.9 Dark Down 54.9 259.9 Up 08:19:52 - 08:49:52 -1527
Yuma 08:34:49 -73.6 Dark Down 54.3 261.2 Up 08:19:49 - 08:49:49 -1571

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 14UU228, (2026/12/15 08:38UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  9.88  98
44Zet Per      03:54:07.9 +31:53:01  2.8 10.65  91
32 Tau         03:56:52.2 +22:28:38  5.6  1.31  90
PPM 093159     04:00:40.7 +20:24:47  8.4  0.94  90
PPM 093127     03:58:36.3 +21:08:53 10.0  0.23  90
14UU228        03:59:21.3 +21:18:02 14.2        90
Positions are for J2000

Event circumstances last updated at 2020/04/03 21:54:11 UT

Marc W. Buie, Southwest Research Institute

RECON