RECON: TNO occultation with 04XX190

Event between 04XX190 and star GA1120:02655235 with event index number of 1980145

Geocentric closest approach at 2028/01/20 11:28:10 UTC

J2000 position of star is 07:07:33.3 +23:26:07
Equinox of date position of star is 07:08:54.6 +23:23:56
Stellar brightness G=11.1, use SENSEUP=8 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 33% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 42.5 AU from the Sun and 41.5 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 693 seconds.
The 1-sigma cross-track error in the shadow position is 4636 km.
The sky-plane scale is 30122.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=258.2 km assuming a 5% albedo -- 10.5 sec chord
Diameter=105.4 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 04XX190, (2028/01/20 11:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:02.0 +27:57:22  1.1  9.66 117
44 Gem         07:06:59.6 +22:35:35  5.9  0.95 125
PPM 097045     07:08:59.3 +24:07:21  8.4  0.74 125
PPM 097066     07:09:19.7 +23:09:16  9.5  0.24 125
PPM 097051     07:09:03.7 +23:22:37 10.3  0.05 125
04XX190        07:09:15.1 +23:23:22 11.1       124
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 19.3 km RECON observability=1.0 and success probability=10.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:25:56 -32.4 Dark Up 25.5 276.0 Low 11:10:56 - 11:40:56 -734
Kamloops 11:26:03 -41.4 Dark Up 34.5 265.6 Up 11:11:03 - 11:41:03 -1238
Kelowna 11:25:59 -41.1 Dark Up 33.9 266.9 Up 11:10:59 - 11:40:59 -1270
Peachland 11:25:59 -41.4 Dark Up 34.1 266.7 Up 11:10:59 - 11:40:59 -1286
Summerland 11:25:59 -41.4 Dark Up 34.1 266.9 Up 11:10:59 - 11:40:59 -1294
Penticton 11:25:58 -41.3 Dark Up 34.0 267.0 Up 11:10:58 - 11:40:58 -1296
Oliver 11:25:57 -41.4 Dark Up 34.1 267.2 Up 11:10:57 - 11:40:57 -1321
Anarchist Mountain Observatory 11:25:56 -41.4 Dark Up 33.9 267.5 Up 11:10:56 - 11:40:56 -1327
Tonasket 11:25:55 -41.5 Dark Up 34.0 267.7 Up 11:10:55 - 11:40:55 -1352
Okanogan 11:25:54 -41.7 Dark Up 34.1 267.8 Up 11:10:54 - 11:40:54 -1381
Brewster 11:25:53 -41.9 Dark Up 34.3 267.8 Up 11:10:53 - 11:40:53 -1407
Manson/Chelan 11:25:53 -42.2 Dark Up 34.5 267.7 Up 11:10:53 - 11:40:53 -1434
Wenatchee 11:25:52 -42.5 Dark Up 34.7 267.8 Up 11:10:52 - 11:40:52 -1475
Victoria 11:26:00 -44.0 Dark Up 36.6 264.7 Up 11:11:00 - 11:41:00 -1484
Ellensburg 11:25:51 -42.8 Dark Up 34.8 268.0 Up 11:10:51 - 11:40:51 -1512
Dunrhomin 11:25:15 -32.9 Dark Up 23.3 281.7 Low 11:10:15 - 11:40:15 -1513
CU-SBO 11:25:14 -33.0 Dark Up 23.3 281.8 Low 11:10:14 - 11:40:14 -1535
PNWRO 11:25:46 -42.0 Dark Up 33.7 269.8 Up 11:10:46 - 11:40:46 -1536
Yakima 11:25:49 -42.9 Dark Up 34.8 268.2 Up 11:10:49 - 11:40:49 -1544
Toppenish/White Swan 11:25:49 -42.8 Dark Up 34.7 268.5 Up 11:10:49 - 11:40:49 -1555
Goldendale 11:25:47 -43.3 Dark Up 35.1 268.6 Up 11:10:47 - 11:40:47 -1610
The Dalles 11:25:47 -43.6 Dark Up 35.3 268.5 Up 11:10:47 - 11:40:47 -1640
Maupin 11:25:46 -43.7 Dark Up 35.3 268.8 Up 11:10:46 - 11:40:46 -1669
Sisters 11:25:44 -44.2 Dark Up 35.6 269.1 Up 11:10:44 - 11:40:44 -1753
Bend 11:25:42 -44.1 Dark Up 35.4 269.5 Up 11:10:42 - 11:40:42 -1764
Oregon Observatory 11:25:42 -44.3 Dark Up 35.5 269.5 Up 11:10:42 - 11:40:42 -1782
North Lake 11:25:39 -44.1 Dark Up 35.2 270.3 Up 11:10:39 - 11:40:39 -1815
Lakeview 11:25:35 -43.9 Dark Up 34.8 271.4 Up 11:10:35 - 11:40:35 -1882
Chiloquin 11:25:39 -44.9 Dark Up 35.9 270.1 Up 11:10:39 - 11:40:39 -1901
Klamath Falls 11:25:38 -45.0 Dark Up 35.8 270.4 Up 11:10:38 - 11:40:38 -1926
Cedarville 11:25:33 -44.0 Dark Up 34.6 272.0 Up 11:10:33 - 11:40:33 -1929
Fall River/Burney 11:25:33 -45.0 Dark Up 35.5 271.5 Up 11:10:33 - 11:40:33 -2011
Susanville 11:25:31 -44.6 Dark Up 34.9 272.4 Up 11:10:31 - 11:40:31 -2037
Gimple 11:25:30 -44.8 Dark Up 35.1 272.5 Up 11:10:30 - 11:40:30 -2068
Greenville 11:25:30 -44.8 Dark Up 35.2 272.4 Up 11:10:30 - 11:40:30 -2070
Reno 11:25:27 -44.1 Dark Up 34.3 273.5 Up 11:10:27 - 11:40:27 -2081
Portola 11:25:28 -44.5 Dark Up 34.8 273.0 Up 11:10:28 - 11:40:28 -2081
Quincy 11:25:30 -44.9 Dark Up 35.1 272.6 Up 11:10:30 - 11:40:30 -2087
Yerington 11:25:24 -43.7 Dark Up 33.7 274.3 Up 11:10:24 - 11:40:24 -2104
Carson City 11:25:26 -44.2 Dark Up 34.2 273.8 Up 11:10:26 - 11:40:26 -2110
Tonopah 11:25:19 -42.3 Dark Up 32.1 276.0 Up 11:10:19 - 11:40:19 -2113
Hawthorne 11:25:22 -43.4 Dark Up 33.3 274.9 Up 11:10:22 - 11:40:22 -2124
Gardnerville 11:25:25 -44.2 Dark Up 34.2 274.0 Up 11:10:25 - 11:40:25 -2129
Indian Springs 11:25:13 -41.3 Dark Up 30.8 277.7 Up 11:10:13 - 11:40:13 -2183
Lee Vining 11:25:21 -43.8 Dark Up 33.6 275.0 Up 11:10:21 - 11:40:21 -2189
Beatty 11:25:15 -42.1 Dark Up 31.7 277.0 Up 11:10:15 - 11:40:15 -2194
Henderson 11:25:10 -40.8 Dark Up 30.1 278.4 Up 11:10:10 - 11:40:10 -2203
Bishop 11:25:18 -43.4 Dark Up 33.0 275.8 Up 11:10:18 - 11:40:18 -2214
Patrick 11:25:07 -39.9 Dark Up 29.2 279.3 Low 11:10:07 - 11:40:07 -2214
Kingman/Dolan Springs 11:25:07 -40.1 Dark Up 29.3 279.4 Low 11:10:07 - 11:40:07 -2240
Laughlin/Bullhead City 11:25:07 -40.5 Dark Up 29.7 279.1 Low 11:10:07 - 11:40:07 -2262
George/Scottsdale 11:25:00 -38.3 Dark Up 27.3 281.2 Low 11:10:00 - 11:40:00 -2283
Mohave Valley 11:25:07 -40.5 Dark Up 29.7 279.3 Low 11:10:07 - 11:40:07 -2285
Lake Havasu City 11:25:05 -40.3 Dark Up 29.4 279.6 Low 11:10:05 - 11:40:05 -2310
Parker 11:25:04 -40.3 Dark Up 29.3 279.8 Low 11:10:04 - 11:40:04 -2339
Idyllwild 11:25:06 -42.4 Dark Up 31.2 278.9 Up 11:10:06 - 11:40:06 -2465
Calipatria 11:25:03 -41.4 Dark Up 30.2 279.8 Up 11:10:03 - 11:40:03 -2474
Yuma 11:25:01 -40.7 Dark Up 29.3 280.4 Low 11:10:01 - 11:40:01 -2477
Wildwood 11:25:10 -43.9 Dark Up 32.8 277.8 Up 11:10:10 - 11:40:10 -2505

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 04XX190, (2028/01/20 11:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  9.66 117
44 Gem         07:05:18.4 +22:38:15  5.9  0.95 125
PPM 097045     07:07:16.9 +24:10:06  8.4  0.74 125
PPM 097066     07:07:38.0 +23:12:02  9.5  0.24 125
PPM 097051     07:07:21.9 +23:25:21 10.3  0.05 125
04XX190        07:07:33.3 +23:26:07 11.1       125
Positions are for J2000

Event circumstances last updated at 2022/05/21 23:03:25 UT

Marc W. Buie, Southwest Research Institute

RECON