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 07:14:53 UTC

J2000 position of star is 06:55:22.1 +26:20:43
Equinox of date position of star is 06:56:51.1 +26:18:47
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 163 seconds.
The 1-sigma cross-track error in the shadow position is 1082 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 5.0 sigma about the mid-time.
The median site spacing is 35.9 km RECON observability=1.0 and success probability=50.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:15:27 -61.2 Dark Down 63.5 162.7 Up 07:01:23 - 07:29:30 584
Kamloops 07:16:13 -61.4 Dark Up 60.1 135.9 Up 07:02:10 - 07:30:17 524
Kelowna 07:16:12 -62.4 Dark Up 61.1 136.3 Up 07:02:08 - 07:30:15 435
Peachland 07:16:13 -62.4 Dark Up 61.0 135.7 Up 07:02:09 - 07:30:16 426
Summerland 07:16:13 -62.6 Dark Up 61.2 135.6 Up 07:02:09 - 07:30:16 410
Penticton 07:16:12 -62.7 Dark Up 61.3 135.7 Up 07:02:09 - 07:30:16 403
Oliver 07:16:13 -63.0 Dark Up 61.5 135.3 Up 07:02:09 - 07:30:16 367
Anarchist Mountain Observatory 07:16:12 -63.2 Dark Up 61.7 135.4 Up 07:02:09 - 07:30:16 348
Victoria 07:16:26 -62.5 Dark Up 60.1 128.5 Up 07:02:22 - 07:30:29 341
Okanogan 07:16:14 -63.7 Dark Up 62.1 134.2 Up 07:02:10 - 07:30:17 285
Brewster 07:16:15 -63.9 Dark Up 62.2 133.5 Up 07:02:11 - 07:30:18 259
Manson/Chelan 07:16:16 -64.0 Dark Up 62.1 132.6 Up 07:02:13 - 07:30:20 241
Wenatchee 07:16:17 -64.4 Dark Up 62.4 131.7 Up 07:02:14 - 07:30:21 195
Ellensburg 07:16:19 -64.7 Dark Up 62.5 130.7 Up 07:02:15 - 07:30:22 155
Yakima 07:16:19 -65.1 Dark Up 62.8 130.1 Up 07:02:16 - 07:30:23 113
Toppenish/White Swan 07:16:19 -65.4 Dark Up 63.0 130.0 Up 07:02:15 - 07:30:22 89
PNWRO 07:16:14 -66.1 Dark Up 64.0 131.9 Up 07:02:11 - 07:30:18 36
The Dalles 07:16:23 -65.8 Dark Up 63.1 127.6 Up 07:02:19 - 07:30:26 17
Maupin 07:16:23 -66.2 Dark Up 63.4 127.1 Up 07:02:19 - 07:30:26 -27
Sisters 07:16:26 -66.8 Dark Up 63.6 125.0 Up 07:02:22 - 07:30:29 -113
Bend 07:16:25 -67.1 Dark Up 63.9 125.0 Up 07:02:22 - 07:30:29 -140
Oregon Observatory 07:16:26 -67.2 Dark Up 64.0 124.5 Up 07:02:22 - 07:30:29 -157
Chiloquin 07:16:29 -68.2 Dark Up 64.4 121.6 Up 07:02:25 - 07:30:32 -290
Klamath Falls 07:16:29 -68.5 Dark Up 64.7 121.1 Up 07:02:25 - 07:30:32 -327
Cedarville 07:16:24 -69.7 Dark Up 66.0 122.2 Up 07:02:21 - 07:30:28 -419
Fall River/Burney 07:16:29 -69.7 Dark Up 65.5 119.5 Up 07:02:26 - 07:30:33 -456
Greenville 07:16:28 -70.6 Dark Up 66.2 118.3 Up 07:02:25 - 07:30:32 -557
Gimple 07:16:28 -70.6 Dark Up 66.3 118.5 Up 07:02:25 - 07:30:32 -558
Quincy 07:16:29 -70.8 Dark Up 66.3 117.9 Up 07:02:25 - 07:30:32 -579
Portola 07:16:27 -71.1 Dark Up 66.7 118.4 Up 07:02:23 - 07:30:30 -598
Reno 07:16:25 -71.6 Dark Up 67.3 118.8 Up 07:02:21 - 07:30:28 -633
Dunrhomin 07:15:28 -72.9 Dark Down 74.7 152.7 Up 07:01:25 - 07:29:32 -652
Carson City 07:16:25 -71.9 Dark Up 67.5 118.1 Up 07:02:22 - 07:30:29 -672
Nikitin 07:15:29 -73.0 Dark Down 74.8 152.3 Up 07:01:25 - 07:29:32 -672
CU-SBO 07:15:29 -73.1 Dark Down 74.8 152.0 Up 07:01:25 - 07:29:32 -679
Gardnerville 07:16:25 -72.1 Dark Up 67.6 117.6 Up 07:02:22 - 07:30:29 -699
Yerington 07:16:23 -72.3 Dark Up 68.0 118.6 Up 07:02:20 - 07:30:27 -700
Hawthorne 07:16:22 -72.9 Dark Up 68.6 118.4 Up 07:02:18 - 07:30:25 -755
Lee Vining 07:16:24 -73.2 Dark Up 68.5 116.4 Up 07:02:20 - 07:30:27 -811
Bishop 07:16:22 -74.0 Dark Up 69.3 116.1 Up 07:02:18 - 07:30:25 -883
Beatty 07:16:16 -75.1 Dark Up 70.6 117.5 Up 07:02:12 - 07:30:19 -950
Patrick 07:16:05 -77.3 Dark Down 73.3 118.5 Up 07:02:02 - 07:30:09 -1136
Laughlin/Bullhead City 07:16:08 -77.4 Dark Down 73.0 116.5 Up 07:02:05 - 07:30:12 -1158
Lake Havasu City 07:16:08 -78.1 Dark Down 73.4 114.9 Up 07:02:04 - 07:30:11 -1233
Wildwood 07:16:25 -76.6 Dark Up 70.3 107.6 Up 07:02:22 - 07:30:29 -1235
Idyllwild 07:16:18 -77.8 Dark Up 71.9 109.0 Up 07:02:14 - 07:30:21 -1294
George/Scottsdale 07:15:58 -79.4 Dark Down 75.6 116.9 Up 07:01:55 - 07:30:02 -1337
Calipatria 07:16:13 -78.8 Dark Down 73.0 108.8 Up 07:02:10 - 07:30:17 -1372
Yuma 07:16:10 -79.6 Dark Down 73.9 108.7 Up 07:02:07 - 07:30:14 -1428

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 2023/12/09 04:30:47 UT

Marc W. Buie, Southwest Research Institute

RECON