RECON: TNO occultation with 590218

Event between (590218) 11UD63 and star GA1200:01032170 with event index number of 2685341

Geocentric closest approach at 2024/12/23 06:43:55 UTC

J2000 position of star is 04:41:31.2 +30:22:49
Equinox of date position of star is 04:43:02.5 +30:25:29
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 47% illuminated.
Apparent brightness V=20.5

[RECON map]
Object is 15.2 AU from the Sun and 14.3 AU from the Earth.
Apparent velocity is 21.4 km/sec on the sky relative to the star, or, 7.4 arcsec/hr.
The 1-sigma error in the time of the event is 44 seconds.
The 1-sigma cross-track error in the shadow position is 571 km.
The sky-plane scale is 10362.4 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, (2024/12/23 06:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.4 +16:33:27  0.8 13.93 116
3Iot Aur       04:58:37.5 +33:12:12  2.7  4.31 109
PPM 093690     04:42:53.8 +28:39:40  5.8  1.77 113
PPM 069580     04:42:22.1 +30:20:17  8.5  0.18 113
590218         04:43:06.5 +30:25:36 16.8       112
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 36.4 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:43:26 -58.9 Dark Down 69.6 186.0 Up 06:39:15 - 06:47:36 4089
Sleaford 06:42:39 -61.1 Dark Down 65.1 215.9 Up 06:38:28 - 06:46:49 4079
Kelowna 06:43:23 -59.9 Dark Down 70.4 188.5 Up 06:39:12 - 06:47:33 3992
Peachland 06:43:24 -59.9 Dark Down 70.5 187.8 Up 06:39:13 - 06:47:34 3985
Summerland 06:43:24 -60.0 Dark Down 70.6 188.1 Up 06:39:13 - 06:47:34 3968
Penticton 06:43:24 -60.1 Dark Down 70.7 188.4 Up 06:39:13 - 06:47:34 3960
Oliver 06:43:24 -60.4 Dark Down 71.0 188.6 Up 06:39:13 - 06:47:34 3923
Victoria 06:43:38 -59.3 Dark Down 71.9 178.4 Up 06:39:27 - 06:47:48 3920
Anarchist Mountain Observatory 06:43:23 -60.6 Dark Down 71.2 189.2 Up 06:39:13 - 06:47:34 3903
Okanogan 06:43:25 -61.1 Dark Down 71.9 188.9 Up 06:39:14 - 06:47:35 3839
Brewster 06:43:25 -61.2 Dark Down 72.1 188.4 Up 06:39:15 - 06:47:36 3814
Manson/Chelan 06:43:27 -61.2 Dark Down 72.4 187.5 Up 06:39:17 - 06:47:38 3799
Wenatchee 06:43:28 -61.5 Dark Down 72.9 187.2 Up 06:39:17 - 06:47:38 3752
Ellensburg 06:43:29 -61.7 Dark Down 73.3 186.8 Up 06:39:19 - 06:47:40 3713
Yakima 06:43:30 -62.0 Dark Down 73.7 186.9 Up 06:39:19 - 06:47:40 3671
Toppenish/White Swan 06:43:29 -62.3 Dark Down 73.9 187.5 Up 06:39:19 - 06:47:40 3645
PNWRO 06:43:25 -63.2 Dark Down 74.1 192.3 Up 06:39:14 - 06:47:35 3582
The Dalles 06:43:33 -62.5 Dark Down 74.7 185.3 Up 06:39:22 - 06:47:43 3577
Maupin 06:43:34 -62.9 Dark Down 75.1 185.8 Up 06:39:23 - 06:47:44 3532
Sisters 06:43:36 -63.2 Dark Down 76.0 184.5 Up 06:39:25 - 06:47:46 3448
Bend 06:43:35 -63.5 Dark Down 76.3 185.5 Up 06:39:25 - 06:47:46 3418
Oregon Observatory 06:43:36 -63.6 Dark Down 76.5 185.1 Up 06:39:25 - 06:47:46 3403
Chiloquin 06:43:39 -64.3 Dark Down 77.8 184.0 Up 06:39:29 - 06:47:50 3271
Klamath Falls 06:43:39 -64.5 Dark Down 78.1 184.4 Up 06:39:29 - 06:47:50 3234
Cedarville 06:43:34 -65.9 Dark Down 78.6 191.7 Up 06:39:23 - 06:47:44 3130
Fall River/Burney 06:43:39 -65.5 Dark Down 79.3 186.7 Up 06:39:29 - 06:47:50 3101
Greenville 06:43:38 -66.4 Dark Down 80.1 189.5 Up 06:39:28 - 06:47:49 2996
Gimple 06:43:38 -66.4 Dark Down 80.1 189.9 Up 06:39:27 - 06:47:48 2994
Quincy 06:43:39 -66.5 Dark Down 80.3 189.7 Up 06:39:28 - 06:47:49 2974
Portola 06:43:37 -66.9 Dark Down 80.4 192.3 Up 06:39:26 - 06:47:47 2952
Reno 06:43:34 -67.4 Dark Down 80.5 195.9 Up 06:39:24 - 06:47:45 2911
Carson City 06:43:35 -67.7 Dark Down 80.9 196.6 Up 06:39:25 - 06:47:46 2872
Gardnerville 06:43:35 -67.8 Dark Down 81.1 197.3 Up 06:39:24 - 06:47:45 2845
Yerington 06:43:33 -68.1 Dark Down 80.9 200.3 Up 06:39:22 - 06:47:43 2840
Dunrhomin 06:42:38 -72.8 Dark Down 72.7 240.5 Up 06:38:27 - 06:46:48 2801
Nikitin 06:42:38 -73.0 Dark Down 72.8 241.0 Up 06:38:27 - 06:46:48 2781
Hawthorne 06:43:31 -68.8 Dark Down 81.2 204.1 Up 06:39:20 - 06:47:41 2780
CU-SBO 06:42:38 -73.0 Dark Down 72.9 241.1 Up 06:38:28 - 06:46:49 2775
Lee Vining 06:43:33 -68.8 Dark Down 81.8 203.0 Up 06:39:23 - 06:47:44 2728
Bishop 06:43:31 -69.6 Dark Down 82.1 208.9 Up 06:39:21 - 06:47:42 2651
Beatty 06:43:25 -70.9 Dark Down 81.8 219.3 Up 06:39:15 - 06:47:36 2572
Patrick 06:43:14 -73.6 Dark Down 81.0 238.4 Up 06:39:04 - 06:47:25 2365
Laughlin/Bullhead City 06:43:18 -73.4 Dark Down 81.6 237.4 Up 06:39:07 - 06:47:28 2349
Wildwood 06:43:35 -71.4 Dark Down 84.8 225.0 Up 06:39:25 - 06:47:46 2300
Lake Havasu City 06:43:18 -74.0 Dark Down 81.8 242.3 Up 06:39:07 - 06:47:28 2271
Idyllwild 06:43:28 -72.9 Dark Down 83.9 238.6 Up 06:39:17 - 06:47:38 2227
George/Scottsdale 06:43:08 -76.0 Dark Down 80.2 253.0 Up 06:38:57 - 06:47:18 2151
Calipatria 06:43:23 -74.0 Dark Down 83.3 247.9 Up 06:39:13 - 06:47:34 2141
Yuma 06:43:20 -74.9 Dark Down 82.7 253.7 Up 06:39:09 - 06:47:30 2079

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, (2024/12/23 06:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 13.93 116
3Iot Aur       04:56:59.6 +33:09:58  2.7  4.31 109
PPM 093690     04:41:19.8 +28:36:53  5.8  1.77 113
PPM 069580     04:40:46.9 +30:17:29  8.5  0.18 113
590218         04:41:31.2 +30:22:49 16.8       113
Positions are for J2000

Event circumstances last updated at 2023/12/06 06:04:49 UT

Marc W. Buie, Southwest Research Institute

RECON