RECON: TNO occultation with 590218

Event between (590218) 11UD63 and star GA1160:02617439 with event index number of 2686265

Geocentric closest approach at 2028/12/23 07:14:10 UTC

J2000 position of star is 06:55:22.1 +26:20:43
Equinox of date position of star is 06:56:50.1 +26:18:48
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 107 degrees from the moon. Moon is 44% illuminated.
Apparent brightness V=19.8

[RECON map]
Object is 13.2 AU from the Sun and 12.2 AU from the Earth.
Apparent velocity is 21.2 km/sec on the sky relative to the star, or, 8.6 arcsec/hr.
The 1-sigma error in the time of the event is 217 seconds.
The 1-sigma cross-track error in the shadow position is 1395 km.
The sky-plane scale is 8841.5 km/arcsec.

The object has an absolute magnitude Hv=8.7
Diameter=105.2 km assuming a 5% albedo -- 5.1 sec chord
Diameter=42.9 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 590218, (2028/12/23 07:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:05.4 +27:57:14  1.1 11.22 117
Alhena         06:39:23.1 +16:22:19  1.9 10.76 104
39 Gem         07:00:34.5 +26:02:24  6.5  0.81 107
PPM 096719     06:56:17.0 +26:29:31  7.9  0.27 106
PPM 096736     06:56:53.4 +26:10:36  9.8  0.14 107
590218         06:57:09.8 +26:18:22 15.2       107
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 4.2 sigma about the mid-time.
The median site spacing is 35.8 km RECON observability=1.0 and success probability=39.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:14:45 -61.2 Dark Down 63.4 162.3 Up 06:59:45 - 07:29:45 462
Kamloops 07:15:31 -61.4 Dark Up 60.0 135.6 Up 07:00:31 - 07:30:31 404
Kelowna 07:15:29 -62.3 Dark Up 61.0 136.0 Up 07:00:29 - 07:30:29 314
Peachland 07:15:30 -62.4 Dark Up 60.9 135.4 Up 07:00:30 - 07:30:30 306
Summerland 07:15:30 -62.5 Dark Up 61.1 135.3 Up 07:00:30 - 07:30:30 290
Penticton 07:15:30 -62.6 Dark Up 61.2 135.4 Up 07:00:30 - 07:30:30 282
Oliver 07:15:30 -62.9 Dark Up 61.4 135.0 Up 07:00:30 - 07:30:30 246
Anarchist Mountain Observatory 07:15:30 -63.2 Dark Up 61.7 135.1 Up 07:00:30 - 07:30:30 227
Victoria 07:15:43 -62.5 Dark Up 60.0 128.3 Up 07:00:43 - 07:30:43 220
Okanogan 07:15:31 -63.7 Dark Up 62.0 133.9 Up 07:00:31 - 07:30:31 164
Brewster 07:15:32 -63.9 Dark Up 62.1 133.2 Up 07:00:32 - 07:30:32 138
Manson/Chelan 07:15:34 -64.0 Dark Up 62.1 132.3 Up 07:00:34 - 07:30:34 121
Wenatchee 07:15:35 -64.4 Dark Up 62.3 131.4 Up 07:00:35 - 07:30:35 74
Ellensburg 07:15:36 -64.7 Dark Up 62.5 130.4 Up 07:00:36 - 07:30:36 34
Yakima 07:15:37 -65.1 Dark Up 62.7 129.8 Up 07:00:37 - 07:30:37 -7
Toppenish/White Swan 07:15:37 -65.3 Dark Up 62.9 129.8 Up 07:00:37 - 07:30:37 -31
PNWRO 07:15:32 -66.1 Dark Up 64.0 131.6 Up 07:00:32 - 07:30:32 -84
The Dalles 07:15:40 -65.8 Dark Up 63.0 127.3 Up 07:00:40 - 07:30:40 -103
Maupin 07:15:40 -66.2 Dark Up 63.3 126.9 Up 07:00:40 - 07:30:40 -147
Sisters 07:15:43 -66.8 Dark Up 63.5 124.7 Up 07:00:43 - 07:30:43 -233
Bend 07:15:43 -67.1 Dark Up 63.8 124.7 Up 07:00:43 - 07:30:43 -261
Oregon Observatory 07:15:43 -67.2 Dark Up 63.9 124.2 Up 07:00:43 - 07:30:43 -277
Chiloquin 07:15:46 -68.1 Dark Up 64.3 121.3 Up 07:00:46 - 07:30:46 -410
Klamath Falls 07:15:47 -68.5 Dark Up 64.5 120.8 Up 07:00:47 - 07:30:47 -447
Cedarville 07:15:42 -69.7 Dark Up 65.9 121.9 Up 07:00:42 - 07:30:42 -539
Fall River/Burney 07:15:47 -69.6 Dark Up 65.4 119.2 Up 07:00:47 - 07:30:47 -576
Greenville 07:15:46 -70.5 Dark Up 66.1 118.1 Up 07:00:46 - 07:30:46 -677
Gimple 07:15:46 -70.6 Dark Up 66.2 118.2 Up 07:00:46 - 07:30:46 -679
Quincy 07:15:46 -70.7 Dark Up 66.2 117.7 Up 07:00:46 - 07:30:46 -699
Portola 07:15:45 -71.0 Dark Up 66.6 118.1 Up 07:00:45 - 07:30:45 -718
Reno 07:15:43 -71.5 Dark Up 67.2 118.5 Up 07:00:43 - 07:30:43 -754
Dunrhomin 07:14:46 -72.9 Dark Down 74.6 152.2 Up 06:59:46 - 07:29:46 -774
Carson City 07:15:43 -71.8 Dark Up 67.3 117.8 Up 07:00:43 - 07:30:43 -792
Nikitin 07:14:46 -73.1 Dark Down 74.8 151.8 Up 06:59:46 - 07:29:46 -794
CU-SBO 07:14:47 -73.1 Dark Down 74.8 151.4 Up 06:59:47 - 07:29:47 -801
Gardnerville 07:15:43 -72.0 Dark Up 67.5 117.4 Up 07:00:43 - 07:30:43 -819
Yerington 07:15:41 -72.2 Dark Up 67.9 118.3 Up 07:00:41 - 07:30:41 -820
Hawthorne 07:15:39 -72.9 Dark Up 68.4 118.1 Up 07:00:39 - 07:30:39 -876
Lee Vining 07:15:42 -73.1 Dark Up 68.4 116.1 Up 07:00:42 - 07:30:42 -931
Bishop 07:15:39 -73.9 Dark Up 69.1 115.8 Up 07:00:39 - 07:30:39 -1003
Beatty 07:15:34 -75.0 Dark Up 70.5 117.2 Up 07:00:34 - 07:30:34 -1070
Patrick 07:15:23 -77.3 Dark Down 73.2 118.1 Up 07:00:23 - 07:30:23 -1257
Laughlin/Bullhead City 07:15:26 -77.3 Dark Down 72.8 116.2 Up 07:00:26 - 07:30:26 -1278
Lake Havasu City 07:15:26 -78.0 Dark Down 73.3 114.6 Up 07:00:26 - 07:30:26 -1354
Wildwood 07:15:43 -76.5 Dark Up 70.2 107.3 Up 07:00:43 - 07:30:43 -1356
Idyllwild 07:15:36 -77.7 Dark Up 71.8 108.8 Up 07:00:36 - 07:30:36 -1415
George/Scottsdale 07:15:16 -79.4 Dark Down 75.5 116.6 Up 07:00:16 - 07:30:16 -1458
Calipatria 07:15:31 -78.8 Dark Down 72.9 108.6 Up 07:00:31 - 07:30:31 -1493
Yuma 07:15:28 -79.5 Dark Down 73.7 108.5 Up 07:00:28 - 07:30:28 -1549

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 590218, (2028/12/23 07:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 11.22 117
Alhena         06:37:42.8 +16:23:56  1.9 10.76 104
39 Gem         06:58:47.1 +26:04:53  6.5  0.81 107
PPM 096719     06:54:29.1 +26:31:50  7.9  0.27 106
PPM 096736     06:55:05.8 +26:12:56  9.8  0.14 107
590218         06:55:22.1 +26:20:43 15.2       107
Positions are for J2000

Event circumstances last updated at 2023/09/04 01:06:47 UT

Marc W. Buie, Southwest Research Institute

RECON