RECON: TNO occultation with 511555

Event between (511555) 14UM225 and star GA1100:00250879 with event index number of 2426890

Geocentric closest approach at 2024/08/19 09:37:37 UTC

J2000 position of star is 02:17:48.9 +21:34:48
Equinox of date position of star is 02:19:10.0 +21:41:24
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 78 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=23.7

[RECON map]
Object is 40.4 AU from the Sun and 40.1 AU from the Earth.
Apparent velocity is 6.6 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 346 seconds.
The 1-sigma cross-track error in the shadow position is 2434 km.
The sky-plane scale is 29086.2 km/arcsec.

The object has an absolute magnitude Hv=7.5
Diameter=199.5 km assuming a 5% albedo -- 28.6 sec chord
Diameter=81.5 km assuming a 30% albedo -- 11.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 511555, (2024/08/19 09:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:20.2 +16:33:24  0.8 32.96 108
Hamal          02:08:34.1 +23:34:40  2.0  3.09  77
17Eta Ari      02:14:11.2 +21:19:32  5.8  1.22  77
PPM 091546     02:19:57.8 +22:00:36  7.9  0.36  79
PPM 091521     02:18:31.0 +21:40:49  9.4  0.16  78
PPM 091542     02:19:48.1 +21:36:46 11.4  0.16  78
511555         02:19:12.1 +21:41:34 17.0        79
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 2.6 sigma about the mid-time.
The median site spacing is 36.2 km RECON observability=1.0 and success probability=8.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:45:41 -16.9 AT Up 53.6 137.1 Up 09:30:41 - 10:00:41 -3484
Kamloops 09:47:39 -22.9 Dark Up 47.6 118.4 Up 09:32:39 - 10:02:39 -3863
Kelowna 09:47:32 -23.4 Dark Up 48.5 118.5 Up 09:32:32 - 10:02:32 -3938
Peachland 09:47:34 -23.6 Dark Up 48.3 118.1 Up 09:32:34 - 10:02:34 -3954
Summerland 09:47:34 -23.7 Dark Up 48.5 118.1 Up 09:32:34 - 10:02:34 -3968
Penticton 09:47:33 -23.7 Dark Up 48.6 118.1 Up 09:32:33 - 10:02:33 -3974
Oliver 09:47:34 -24.0 Dark Up 48.7 117.8 Up 09:32:34 - 10:02:34 -4011
Anarchist Mountain Observatory 09:47:32 -24.1 Dark Up 48.9 117.8 Up 09:32:32 - 10:02:32 -4027
Okanogan 09:47:34 -24.7 Dark Up 49.1 116.9 Up 09:32:34 - 10:02:34 -4098
Victoria 09:48:05 -25.7 Dark Up 46.8 113.1 Up 09:33:05 - 10:03:05 -4126
Brewster 09:47:37 -25.0 Dark Up 49.1 116.4 Up 09:32:37 - 10:02:37 -4130
Manson/Chelan 09:47:40 -25.3 Dark Up 49.0 115.8 Up 09:32:40 - 10:02:40 -4157
Wenatchee 09:47:40 -25.8 Dark Up 49.1 115.1 Up 09:32:40 - 10:02:40 -4209
Ellensburg 09:47:42 -26.2 Dark Up 49.1 114.5 Up 09:32:42 - 10:02:42 -4257
Yakima 09:47:43 -26.6 Dark Up 49.3 114.0 Up 09:32:43 - 10:02:43 -4300
Toppenish/White Swan 09:47:40 -26.7 Dark Up 49.5 114.0 Up 09:32:40 - 10:02:40 -4321
PNWRO 09:47:28 -26.6 Dark Up 50.5 115.1 Up 09:32:28 - 10:02:28 -4341
The Dalles 09:47:48 -27.7 Dark Up 49.3 112.4 Up 09:32:48 - 10:02:48 -4415
Maupin 09:47:47 -28.0 Dark Up 49.5 112.0 Up 09:32:47 - 10:02:47 -4459
Sisters 09:47:52 -28.9 Dark Up 49.5 110.6 Up 09:32:52 - 10:02:52 -4560
Bend 09:47:48 -29.1 Dark Up 49.8 110.6 Up 09:32:48 - 10:02:48 -4583
Oregon Observatory 09:47:49 -29.3 Dark Up 49.7 110.2 Up 09:32:49 - 10:02:49 -4603
Dunrhomin 09:45:06 -25.4 Dark Up 61.7 123.7 Up 09:30:06 - 10:00:06 -4681
Nikitin 09:45:06 -25.5 Dark Up 61.8 123.4 Up 09:30:06 - 10:00:06 -4700
CU-SBO 09:45:07 -25.6 Dark Up 61.8 123.2 Up 09:30:07 - 10:00:07 -4709
Chiloquin 09:47:53 -30.6 Dark Up 49.9 108.4 Up 09:32:53 - 10:02:53 -4752
Klamath Falls 09:47:51 -30.9 Dark Up 50.1 108.1 Up 09:32:51 - 10:02:51 -4788
Cedarville 09:47:38 -30.9 Dark Up 51.4 108.7 Up 09:32:38 - 10:02:38 -4842
Fall River/Burney 09:47:47 -31.8 Dark Up 50.7 107.0 Up 09:32:47 - 10:02:47 -4911
Gimple 09:47:42 -32.4 Dark Up 51.3 106.4 Up 09:32:42 - 10:02:42 -5003
Greenville 09:47:43 -32.4 Dark Up 51.2 106.4 Up 09:32:43 - 10:02:43 -5004
Quincy 09:47:42 -32.6 Dark Up 51.3 106.1 Up 09:32:42 - 10:02:42 -5026
Portola 09:47:37 -32.5 Dark Up 51.7 106.4 Up 09:32:37 - 10:02:37 -5033
Reno 09:47:31 -32.5 Dark Up 52.2 106.6 Up 09:32:31 - 10:02:31 -5053
Carson City 09:47:30 -32.8 Dark Up 52.3 106.2 Up 09:32:30 - 10:02:30 -5091
Yerington 09:47:24 -32.7 Dark Up 52.8 106.5 Up 09:32:24 - 10:02:24 -5103
Gardnerville 09:47:29 -33.0 Dark Up 52.4 105.9 Up 09:32:29 - 10:02:29 -5117
Hawthorne 09:47:18 -32.9 Dark Up 53.3 106.4 Up 09:32:18 - 10:02:18 -5145
Lee Vining 09:47:20 -33.6 Dark Up 53.1 105.2 Up 09:32:20 - 10:02:20 -5215
Bishop 09:47:13 -33.8 Dark Up 53.8 105.1 Up 09:32:13 - 10:02:13 -5268
Beatty 09:46:57 -33.5 Dark Up 55.1 105.9 Up 09:31:57 - 10:01:57 -5291
Patrick 09:46:23 -33.4 Dark Up 57.7 106.3 Up 09:31:23 - 10:01:23 -5397
Laughlin/Bullhead City 09:46:30 -33.9 Dark Up 57.2 105.3 Up 09:31:30 - 10:01:30 -5437
Lake Havasu City 09:46:26 -34.3 Dark Up 57.6 104.5 Up 09:31:26 - 10:01:26 -5505
George/Scottsdale 09:45:58 -33.7 Dark Up 59.7 105.4 Up 09:30:58 - 10:00:58 -5537
Wildwood 09:47:09 -36.6 Dark Up 54.4 100.5 Up 09:32:09 - 10:02:09 -5628
Idyllwild 09:46:48 -36.1 Dark Up 55.9 101.4 Up 09:31:48 - 10:01:48 -5634
Calipatria 09:46:34 -36.0 Dark Up 56.9 101.4 Up 09:31:34 - 10:01:34 -5678
Yuma 09:46:23 -35.9 Dark Up 57.7 101.4 Up 09:31:23 - 10:01:23 -5706

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 511555, (2024/08/19 09:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 32.96 108
Hamal          02:07:10.7 +23:27:41  2.0  3.09  77
17Eta Ari      02:12:48.4 +21:12:40  5.8  1.22  77
PPM 091546     02:18:34.5 +21:53:51  7.9  0.36  79
PPM 091521     02:17:07.8 +21:34:02  9.4  0.16  78
PPM 091542     02:18:25.0 +21:30:01 11.4  0.16  78
511555         02:17:48.9 +21:34:48 17.0        78
Positions are for J2000

Event circumstances last updated at 2024/01/08 05:08:34 UT

Marc W. Buie, Southwest Research Institute

RECON