RECON: TNO occultation with 470523

Event between (470523) 08CS190 and star GA0800:04140446 with event index number of 2278343

Geocentric closest approach at 2028/02/10 11:18:08 UTC

J2000 position of star is 11:45:08.7 -08:00:51
Equinox of date position of star is 11:46:17.3 -08:08:19
Stellar brightness G=12.3, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 41 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 38.4 AU from the Sun and 37.6 AU from the Earth.
The TNO is moving 18.9 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 194 seconds.
The 1-sigma cross-track error in the shadow position is 3101 km.
The sky-plane scale is 27284.9 km/arcsec.

The TNO has an absolute magnitude Hv=6.3
Diameter=335.7 km assuming a 5% albedo -- 17.8 sec chord
Diameter=137.1 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 

Star training set for 470523, (2028/02/10 11:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:40.7 -11:18:26  1.0 24.85  65
4Gam Crv       12:17:15.4 -17:41:52  2.6 12.10  53
PPM 194769     11:45:21.4 -06:50:01  6.1  1.37  40
PPM 194768     11:45:21.2 -09:17:19  7.1  1.16  42
PPM 194778     11:45:54.4 -08:14:40  8.8  0.18  41
470523         11:46:34.8 -08:10:13 12.3        42
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 4.6 sigma about the mid-time.
The median site spacing is 18.6 km RECON observability=1.0 and success probability=11.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:17:33 -29.7 Dark Up 25.5 210.2 Low 11:02:33 - 11:32:33 -742
Kamloops 11:18:19 -38.4 Dark Up 30.2 194.9 Up 11:03:19 - 11:33:19 -947
Kelowna 11:18:15 -38.3 Dark Up 30.9 196.1 Up 11:03:15 - 11:33:15 -981
Peachland 11:18:15 -38.5 Dark Up 31.0 195.8 Up 11:03:15 - 11:33:15 -990
Summerland 11:18:15 -38.5 Dark Up 31.2 195.9 Up 11:03:15 - 11:33:15 -997
Penticton 11:18:14 -38.5 Dark Up 31.2 196.0 Up 11:03:14 - 11:33:14 -1000
Oliver 11:18:13 -38.7 Dark Up 31.5 196.1 Up 11:03:13 - 11:33:13 -1019
Anarchist Mountain Observatory 11:18:13 -38.6 Dark Up 31.7 196.3 Up 11:03:13 - 11:33:13 -1026
Tonasket 11:18:13 -38.8 Dark Up 32.0 196.3 Up 11:03:13 - 11:33:13 -1045
Okanogan 11:18:13 -39.0 Dark Up 32.3 196.2 Up 11:03:13 - 11:33:13 -1066
Brewster 11:18:13 -39.3 Dark Up 32.6 196.0 Up 11:03:13 - 11:33:13 -1083
Manson/Chelan 11:18:14 -39.6 Dark Up 32.9 195.6 Up 11:03:14 - 11:33:14 -1100
Victoria 11:18:27 -41.2 Dark Up 32.8 191.8 Up 11:03:27 - 11:33:27 -1102
Wenatchee 11:18:13 -39.9 Dark Up 33.4 195.5 Up 11:03:13 - 11:33:13 -1129
Ellensburg 11:18:14 -40.2 Dark Up 33.8 195.3 Up 11:03:14 - 11:33:14 -1156
Yakima 11:18:13 -40.4 Dark Up 34.2 195.4 Up 11:03:13 - 11:33:13 -1181
Toppenish/White Swan 11:18:13 -40.4 Dark Up 34.4 195.6 Up 11:03:13 - 11:33:13 -1192
PNWRO 11:18:06 -39.6 Dark Up 34.5 197.4 Up 11:03:06 - 11:33:06 -1196
Goldendale 11:18:14 -40.9 Dark Up 35.0 195.2 Up 11:03:14 - 11:33:14 -1230
The Dalles 11:18:15 -41.2 Dark Up 35.3 194.8 Up 11:03:15 - 11:33:15 -1249
Maupin 11:18:14 -41.3 Dark Up 35.7 195.0 Up 11:03:14 - 11:33:14 -1273
Sisters 11:18:14 -42.0 Dark Up 36.6 194.6 Up 11:03:14 - 11:33:14 -1334
Bend 11:18:13 -41.9 Dark Up 36.8 194.9 Up 11:03:13 - 11:33:13 -1346
Oregon Observatory 11:18:13 -42.1 Dark Up 37.0 194.8 Up 11:03:13 - 11:33:13 -1359
North Lake 11:18:10 -42.0 Dark Up 37.5 195.6 Up 11:03:10 - 11:33:10 -1393
Dunrhomin 11:17:00 -31.6 Dark Up 35.3 214.6 Up 11:02:00 - 11:32:00 -1418
CU-SBO 11:17:00 -31.7 Dark Up 35.6 214.6 Up 11:02:00 - 11:32:00 -1435
Chiloquin 11:18:13 -42.9 Dark Up 38.3 194.5 Up 11:03:13 - 11:33:13 -1450
Lakeview 11:18:06 -42.0 Dark Up 38.4 196.5 Up 11:03:06 - 11:33:06 -1456
Klamath Falls 11:18:12 -42.9 Dark Up 38.7 194.7 Up 11:03:12 - 11:33:12 -1472
Cedarville 11:18:04 -42.1 Dark Up 39.0 196.8 Up 11:03:04 - 11:33:04 -1498
Fall River/Burney 11:18:09 -43.1 Dark Up 39.7 195.4 Up 11:03:09 - 11:33:09 -1547
Susanville 11:18:04 -42.8 Dark Up 40.2 196.5 Up 11:03:04 - 11:33:04 -1581
Gimple 11:18:05 -43.1 Dark Up 40.5 196.3 Up 11:03:05 - 11:33:05 -1603
Greenville 11:18:05 -43.1 Dark Up 40.5 196.2 Up 11:03:05 - 11:33:05 -1604
Quincy 11:18:05 -43.2 Dark Up 40.7 196.2 Up 11:03:05 - 11:33:05 -1618
Portola 11:18:03 -42.9 Dark Up 40.7 196.9 Up 11:03:03 - 11:33:03 -1620
Reno 11:18:00 -42.5 Dark Up 40.8 197.7 Up 11:03:00 - 11:33:00 -1630
Carson City 11:17:59 -42.6 Dark Up 41.2 197.9 Up 11:02:59 - 11:32:59 -1655
Yerington 11:17:56 -42.2 Dark Up 41.2 198.7 Up 11:02:56 - 11:32:56 -1661
Gardnerville 11:17:58 -42.7 Dark Up 41.4 198.0 Up 11:02:58 - 11:32:58 -1672
Hawthorne 11:17:53 -42.0 Dark Up 41.5 199.5 Up 11:02:53 - 11:32:53 -1687
Tonopah 11:17:45 -41.1 Dark Up 41.6 201.4 Up 11:02:45 - 11:32:45 -1702
Lee Vining 11:17:54 -42.5 Dark Up 42.2 199.1 Up 11:02:54 - 11:32:54 -1734
Bishop 11:17:50 -42.1 Dark Up 42.5 200.1 Up 11:02:50 - 11:32:50 -1768
Beatty 11:17:42 -41.0 Dark Up 42.5 202.4 Up 11:02:42 - 11:32:42 -1781
Indian Springs 11:17:36 -40.3 Dark Up 42.5 203.8 Up 11:02:36 - 11:32:36 -1792
Henderson 11:17:33 -39.9 Dark Up 42.7 204.9 Up 11:02:33 - 11:32:33 -1823
Patrick 11:17:26 -39.1 Dark Up 42.9 206.5 Up 11:02:26 - 11:32:26 -1856
Kingman/Dolan Springs 11:17:27 -39.3 Dark Up 43.2 206.4 Up 11:02:27 - 11:32:27 -1875
Laughlin/Bullhead City 11:17:29 -39.7 Dark Up 43.4 205.7 Up 11:02:29 - 11:32:29 -1884
Mohave Valley 11:17:28 -39.8 Dark Up 43.6 205.9 Up 11:02:28 - 11:32:28 -1904
Lake Havasu City 11:17:26 -39.6 Dark Up 43.9 206.3 Up 11:02:26 - 11:32:26 -1932
Parker 11:17:26 -39.7 Dark Up 44.2 206.5 Up 11:02:26 - 11:32:26 -1959
George/Scottsdale 11:17:14 -37.8 Dark Up 43.7 209.7 Up 11:02:14 - 11:32:14 -1961
Wildwood 11:17:46 -43.1 Dark Up 45.7 201.0 Up 11:02:46 - 11:32:46 -2019
Idyllwild 11:17:36 -41.7 Dark Up 45.4 203.6 Up 11:02:36 - 11:32:36 -2021
Calipatria 11:17:30 -40.9 Dark Up 45.6 205.4 Up 11:02:30 - 11:32:30 -2054
Yuma 11:17:25 -40.2 Dark Up 45.6 206.7 Up 11:02:25 - 11:32:25 -2076

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 470523, (2028/02/10 11:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 24.85  65
4Gam Crv       12:15:48.1 -17:32:30  2.6 12.10  53
PPM 194769     11:43:55.2 -06:40:39  6.1  1.37  40
PPM 194768     11:43:55.1 -09:07:57  7.1  1.16  42
PPM 194778     11:44:28.3 -08:05:18  8.8  0.18  41
470523         11:45:08.7 -08:00:51 12.3        41
Positions are for J2000

Event circumstances last updated at 2022/05/22 23:04:22 UT

Marc W. Buie, Southwest Research Institute

RECON