RECON: TNO occultation with 12EE18

Event between 12EE18 and star GA0680:05939444 with event index number of 2144418

Geocentric closest approach at 2024/05/19 05:03:32 UTC

J2000 position of star is 14:36:02.7 -21:22:40
Equinox of date position of star is 14:37:23.9 -21:28:51
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 35 degrees from the moon. Moon is 83% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 38.1 AU from the Sun and 37.1 AU from the Earth.
Apparent velocity is 23.0 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 235 seconds.
The 1-sigma cross-track error in the shadow position is 3225 km.
The sky-plane scale is 26934.8 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=332.7 km assuming a 5% albedo -- 14.4 sec chord
Diameter=135.8 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 12EE18, (2024/05/19 05:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:28.9 -11:17:16  1.0 19.81  15
27Bet Lib      15:18:19.4 -09:28:17  2.6 15.52  41
PPM 263395     14:48:37.2 -21:25:33  5.9  2.60  37
PPM 263114     14:35:09.1 -21:08:24  8.5  0.63  34
PPM 263132     14:36:08.9 -21:14:03  9.6  0.39  34
12EE18         14:37:25.7 -21:28:59 15.9        35
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 3.8 sigma about the mid-time.
The median site spacing is 8.0 km RECON observability=0.6 and success probability=9.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:05:49 -13.8 AT Up 15.9 169.2 Really Low 04:50:49 - 05:20:49 1411
Dunrhomin 05:05:45 -24.5 Dark Up 27.6 169.1 Low 04:50:45 - 05:20:45 901
Nikitin 05:05:45 -24.7 Dark Up 27.8 169.1 Low 04:50:45 - 05:20:45 891
CU-SBO 05:05:45 -24.7 Dark Up 27.8 169.0 Low 04:50:45 - 05:20:45 884
Kamloops 05:06:25 -10.0 NT Up 14.5 155.6 Really Low 04:51:25 - 05:21:25 867
Kelowna 05:06:23 -11.0 NT Up 15.5 156.4 Really Low 04:51:23 - 05:21:23 859
Peachland 05:06:24 -11.0 NT Up 15.5 156.1 Really Low 04:51:24 - 05:21:24 843
Penticton 05:06:24 -11.2 NT Up 15.8 156.2 Really Low 04:51:24 - 05:21:24 839
Summerland 05:06:24 -11.1 NT Up 15.7 156.1 Really Low 04:51:24 - 05:21:24 838
Oliver 05:06:24 -11.5 NT Up 16.1 156.2 Really Low 04:51:24 - 05:21:24 821
Anarchist Mountain Observatory 05:06:24 -11.7 NT Up 16.3 156.4 Really Low 04:51:24 - 05:21:24 820
Okanogan 05:06:25 -12.1 AT Up 16.9 156.1 Really Low 04:51:25 - 05:21:25 779
Brewster 05:06:26 -12.2 AT Up 17.0 155.9 Really Low 04:51:26 - 05:21:26 757
Manson/Chelan 05:06:26 -12.2 AT Up 17.1 155.5 Really Low 04:51:26 - 05:21:26 732
Wenatchee 05:06:27 -12.5 AT Up 17.5 155.3 Really Low 04:51:27 - 05:21:27 701
PNWRO 05:06:24 -14.2 AT Up 19.2 156.4 Really Low 04:51:24 - 05:21:24 680
Ellensburg 05:06:28 -12.7 AT Up 17.8 155.0 Really Low 04:51:28 - 05:21:28 670
Yakima 05:06:29 -13.0 AT Up 18.2 155.0 Really Low 04:51:29 - 05:21:29 647
Victoria 05:06:34 -10.3 NT Up 15.6 152.6 Really Low 04:51:34 - 05:21:34 644
Toppenish/White Swan 05:06:28 -13.3 AT Up 18.4 155.1 Really Low 04:51:28 - 05:21:28 642
The Dalles 05:06:31 -13.5 AT Up 18.9 154.2 Really Low 04:51:31 - 05:21:31 567
Maupin 05:06:31 -13.8 AT Up 19.3 154.3 Really Low 04:51:31 - 05:21:31 548
Sisters 05:06:32 -14.3 AT Up 20.0 153.7 Really Low 04:51:32 - 05:21:32 478
Bend 05:06:32 -14.6 AT Up 20.3 153.9 Low 04:51:32 - 05:21:32 474
Oregon Observatory 05:06:32 -14.6 AT Up 20.4 153.7 Low 04:51:32 - 05:21:32 459
Cedarville 05:06:30 -17.0 AT Up 22.9 154.5 Low 04:51:30 - 05:21:30 370
Chiloquin 05:06:34 -15.4 AT Up 21.4 153.1 Low 04:51:34 - 05:21:34 363
Klamath Falls 05:06:34 -15.7 AT Up 21.8 153.1 Low 04:51:34 - 05:21:34 345
Fall River/Burney 05:06:34 -16.7 AT Up 22.9 153.3 Low 04:51:34 - 05:21:34 288
Reno 05:06:29 -18.7 Dark Up 24.8 154.5 Low 04:51:29 - 05:21:29 261
Yerington 05:06:28 -19.4 Dark Up 25.5 155.0 Low 04:51:28 - 05:21:28 254
Patrick 05:06:12 -24.8 Dark Up 30.4 159.5 Up 04:51:12 - 05:21:12 254
Gimple 05:06:32 -17.7 AT Up 23.9 153.6 Low 04:51:32 - 05:21:32 253
Portola 05:06:31 -18.1 Dark Up 24.4 153.9 Low 04:51:31 - 05:21:31 250
Greenville 05:06:33 -17.6 AT Up 23.9 153.5 Low 04:51:33 - 05:21:33 250
Hawthorne 05:06:26 -20.0 Dark Up 26.1 155.4 Low 04:51:26 - 05:21:26 247
Carson City 05:06:29 -18.9 Dark Up 25.1 154.4 Low 04:51:29 - 05:21:29 239
Quincy 05:06:32 -17.8 AT Up 24.1 153.5 Low 04:51:32 - 05:21:32 237
George/Scottsdale 05:06:05 -27.2 Dark Up 32.6 161.2 Up 04:51:05 - 05:21:05 230
Gardnerville 05:06:29 -19.1 Dark Up 25.4 154.4 Low 04:51:29 - 05:21:29 225
Beatty 05:06:21 -22.2 Dark Up 28.2 156.9 Low 04:51:21 - 05:21:21 224
Laughlin/Bullhead City 05:06:14 -24.6 Dark Up 30.5 158.7 Up 04:51:14 - 05:21:14 206
Lee Vining 05:06:28 -20.2 Dark Up 26.5 154.8 Low 04:51:28 - 05:21:28 190
Bishop 05:06:26 -21.0 Dark Up 27.2 155.4 Low 04:51:26 - 05:21:26 182
Lake Havasu City 05:06:13 -25.3 Dark Up 31.2 158.8 Up 04:51:13 - 05:21:13 172
Yuma 05:06:13 -26.5 Dark Up 32.7 158.1 Up 04:51:13 - 05:21:13 36
Calipatria 05:06:16 -25.7 Dark Up 32.1 157.3 Up 04:51:16 - 05:21:16 25
Idyllwild 05:06:20 -24.6 Dark Up 31.1 156.2 Up 04:51:20 - 05:21:20 14
Wildwood 05:06:26 -23.3 Dark Up 30.1 154.4 Up 04:51:26 - 05:21:26 -48

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 12EE18, (2024/05/19 05:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 19.81  15
27Bet Lib      15:17:00.3 -09:22:59  2.6 15.52  41
PPM 263395     14:47:13.6 -21:19:29  5.9  2.60  37
PPM 263114     14:33:46.3 -21:02:02  8.5  0.63  34
PPM 263132     14:34:46.0 -21:07:43  9.6  0.39  34
12EE18         14:36:02.7 -21:22:40 15.9        35
Positions are for J2000

Event circumstances last updated at 2023/11/07 05:22:58 UT

Marc W. Buie, Southwest Research Institute

RECON