RECON: TNO occultation with 559177

Event between (559177) 15BF518 and star GA0720:05494475 with event index number of 2749058

Geocentric closest approach at 2029/03/26 09:56:25 UTC

J2000 position of star is 14:47:35.3 -16:20:05
Equinox of date position of star is 14:48:56.1 -16:26:05
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 90 degrees from the moon. Moon is 81% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 18.0 AU from the Sun and 17.2 AU from the Earth.
Apparent velocity is 15.5 km/sec on the sky relative to the star, or, 4.5 arcsec/hr.
The 1-sigma error in the time of the event is 286 seconds.
The 1-sigma cross-track error in the shadow position is 2130 km.
The sky-plane scale is 12480.8 km/arcsec.

The object has an absolute magnitude Hv=9.9
Diameter=62.5 km assuming a 5% albedo -- 4.1 sec chord
Diameter=25.5 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 559177, (2029/03/26 09:56UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:44.3 -11:18:47  1.0 20.65  69
27Bet Lib      15:18:35.1 -09:29:20  2.6  9.98  95
8Alp1Lib       14:52:18.6 -16:07:01  5.1  0.82  90
PPM 229241     14:47:13.5 -16:51:56  8.2  0.63  89
PPM 229285     14:48:40.0 -16:35:40  9.2  0.19  90
559177         14:49:12.9 -16:27:20 15.6        90
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 3.2 sigma about the mid-time.
The median site spacing is 8.7 km RECON observability=1.0 and success probability=4.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:58:38 -24.9 Dark Up 21.4 186.2 Low 09:43:38 - 10:13:38 5394
Kamloops 09:59:34 -31.7 Dark Up 22.6 171.4 Low 09:44:34 - 10:14:34 4923
Kelowna 09:59:30 -32.1 Dark Up 23.5 172.3 Low 09:44:30 - 10:14:30 4914
Dunrhomin 09:58:13 -32.1 Dark Up 33.1 187.6 Up 09:43:13 - 10:13:13 4903
Peachland 09:59:32 -32.3 Dark Up 23.6 172.0 Low 09:44:32 - 10:14:32 4900
Penticton 09:59:30 -32.4 Dark Up 23.8 172.2 Low 09:44:30 - 10:14:30 4896
Summerland 09:59:31 -32.4 Dark Up 23.7 172.1 Low 09:44:31 - 10:14:31 4896
Nikitin 09:58:12 -32.2 Dark Up 33.3 187.6 Up 09:43:12 - 10:13:12 4893
CU-SBO 09:58:12 -32.3 Dark Up 33.3 187.5 Up 09:43:12 - 10:13:12 4887
Oliver 09:59:30 -32.7 Dark Up 24.2 172.2 Low 09:44:30 - 10:14:30 4880
Anarchist Mountain Observatory 09:59:30 -32.8 Dark Up 24.3 172.4 Low 09:44:30 - 10:14:30 4878
Okanogan 09:59:30 -33.4 Dark Up 25.0 172.1 Low 09:44:30 - 10:14:30 4840
Brewster 09:59:31 -33.7 Dark Up 25.2 171.9 Low 09:44:31 - 10:14:31 4820
Manson/Chelan 09:59:32 -34.0 Dark Up 25.4 171.5 Low 09:44:32 - 10:14:32 4798
Wenatchee 09:59:32 -34.4 Dark Up 25.8 171.2 Low 09:44:32 - 10:14:32 4769
PNWRO 09:59:25 -35.0 Dark Up 27.4 172.7 Low 09:44:25 - 10:14:25 4746
Ellensburg 09:59:32 -34.9 Dark Up 26.2 171.0 Low 09:44:32 - 10:14:32 4741
Victoria 09:59:45 -34.6 Dark Up 24.4 168.1 Low 09:44:45 - 10:14:45 4722
Yakima 09:59:33 -35.2 Dark Up 26.6 170.9 Low 09:44:33 - 10:14:33 4719
Toppenish/White Swan 09:59:32 -35.3 Dark Up 26.8 171.1 Low 09:44:32 - 10:14:32 4714
The Dalles 09:59:36 -36.3 Dark Up 27.5 170.2 Low 09:44:36 - 10:14:36 4646
Maupin 09:59:34 -36.6 Dark Up 28.0 170.3 Low 09:44:34 - 10:14:34 4628
Sisters 09:59:36 -37.5 Dark Up 28.8 169.7 Low 09:44:36 - 10:14:36 4563
Bend 09:59:35 -37.6 Dark Up 29.0 169.9 Low 09:44:35 - 10:14:35 4559
Oregon Observatory 09:59:36 -37.8 Dark Up 29.2 169.8 Low 09:44:36 - 10:14:36 4545
Cedarville 09:59:27 -39.1 Dark Up 31.7 170.9 Up 09:44:27 - 10:14:27 4456
Chiloquin 09:59:35 -39.0 Dark Up 30.4 169.2 Up 09:44:35 - 10:14:35 4455
Klamath Falls 09:59:34 -39.3 Dark Up 30.8 169.2 Up 09:44:34 - 10:14:34 4438
Fall River/Burney 09:59:33 -40.0 Dark Up 32.0 169.5 Up 09:44:33 - 10:14:33 4382
Reno 09:59:23 -40.5 Dark Up 33.7 171.1 Up 09:44:23 - 10:14:23 4351
Gimple 09:59:28 -40.5 Dark Up 32.9 170.0 Up 09:44:28 - 10:14:28 4347
Greenville 09:59:29 -40.6 Dark Up 32.9 169.9 Up 09:44:29 - 10:14:29 4344
Portola 09:59:26 -40.6 Dark Up 33.3 170.4 Up 09:44:26 - 10:14:26 4342
Yerington 09:59:20 -40.6 Dark Up 34.3 171.8 Up 09:44:20 - 10:14:20 4342
Hawthorne 09:59:16 -40.7 Dark Up 34.8 172.3 Up 09:44:16 - 10:14:16 4333
Quincy 09:59:30 -40.7 Dark Up 33.1 169.9 Up 09:44:30 - 10:14:30 4332
Carson City 09:59:23 -40.8 Dark Up 34.0 171.1 Up 09:44:23 - 10:14:23 4330
Patrick 09:58:48 -40.3 Dark Up 38.2 177.6 Up 09:43:48 - 10:13:48 4317
Gardnerville 09:59:22 -41.0 Dark Up 34.3 171.1 Up 09:44:22 - 10:14:22 4316
Beatty 09:59:05 -40.9 Dark Up 36.6 174.3 Up 09:44:05 - 10:14:05 4302
George/Scottsdale 09:58:35 -40.2 Dark Up 39.9 180.0 Up 09:43:35 - 10:13:35 4284
Lee Vining 09:59:18 -41.4 Dark Up 35.3 171.7 Up 09:44:18 - 10:14:18 4279
Laughlin/Bullhead City 09:58:51 -40.9 Dark Up 38.4 176.8 Up 09:43:51 - 10:13:51 4274
Bishop 09:59:15 -41.5 Dark Up 36.0 172.5 Up 09:44:15 - 10:14:15 4269
Lake Havasu City 09:58:49 -41.2 Dark Up 39.1 177.1 Up 09:43:49 - 10:13:49 4240
Yuma 09:58:47 -42.6 Dark Up 40.9 176.6 Up 09:43:47 - 10:13:47 4109
Calipatria 09:58:54 -42.9 Dark Up 40.4 175.5 Up 09:43:54 - 10:13:54 4103
Idyllwild 09:59:00 -43.2 Dark Up 39.7 174.1 Up 09:44:00 - 10:14:00 4098
Wildwood 09:59:11 -44.0 Dark Up 39.2 171.9 Up 09:44:11 - 10:14:11 4046

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 559177, (2029/03/26 09:56UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 20.65  69
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.98  95
8Alp1Lib       14:50:41.0 -15:59:52  5.1  0.82  90
PPM 229241     14:45:35.8 -16:44:38  8.2  0.63  89
PPM 229285     14:47:02.3 -16:28:24  9.2  0.19  90
559177         14:47:35.3 -16:20:05 15.6        90
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:12:39 UT

Marc W. Buie, Southwest Research Institute

RECON