RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1080:12601034 with event index number of 2206610

Geocentric closest approach at 2028/08/16 09:20:26 UTC

J2000 position of star is 19:44:53.4 +18:29:15
Equinox of date position of star is 19:45:58.1 +18:32:51
Stellar brightness G=10.9, use SENSEUP=4 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 129 degrees from the moon. Moon is 21% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 16.5 AU from the Sun and 15.8 AU from the Earth.
Apparent velocity is 31.5 km/sec on the sky relative to the star, or, 9.9 arcsec/hr.
The 1-sigma error in the time of the event is 46 seconds.
The 1-sigma cross-track error in the shadow position is 2152 km.
The sky-plane scale is 11447.0 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 2.5 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2028/08/16 09:21UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:54.4 +38:48:41  0.0 25.09 115
Tarazed        19:47:37.2 +10:41:06  2.7  7.88 135
7Del Sge       19:48:39.9 +18:36:24  3.8  0.59 128
PPM 136883     19:45:48.1 +18:39:34  8.5  0.13 129
342842         19:46:09.9 +18:33:30 10.9       128
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 36.2 km RECON observability=1.0 and success probability=17.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:17:39 -18.7 Dark Up 31.2 259.9 Up 09:13:19 - 09:22:00 -1750
Kamloops 09:17:58 -23.9 Dark Up 40.2 247.8 Up 09:13:38 - 09:22:19 -1778
Kelowna 09:17:57 -24.5 Dark Up 40.0 249.3 Up 09:13:36 - 09:22:17 -1878
Peachland 09:17:57 -24.6 Dark Up 40.2 249.1 Up 09:13:37 - 09:22:18 -1885
Summerland 09:17:57 -24.8 Dark Up 40.2 249.3 Up 09:13:37 - 09:22:18 -1903
Penticton 09:17:57 -24.8 Dark Up 40.2 249.5 Up 09:13:36 - 09:22:17 -1911
Oliver 09:17:57 -25.1 Dark Up 40.3 249.8 Up 09:13:36 - 09:22:17 -1949
Victoria 09:18:03 -26.5 Dark Up 42.9 246.6 Up 09:13:43 - 09:22:24 -1960
Anarchist Mountain Observatory 09:17:56 -25.2 Dark Up 40.2 250.1 Up 09:13:36 - 09:22:17 -1970
Okanogan 09:17:57 -25.9 Dark Up 40.6 250.4 Up 09:13:36 - 09:22:17 -2036
Brewster 09:17:58 -26.2 Dark Up 40.8 250.4 Up 09:13:37 - 09:22:18 -2063
Manson/Chelan 09:17:58 -26.5 Dark Up 41.1 250.3 Up 09:13:37 - 09:22:18 -2080
Wenatchee 09:17:58 -27.0 Dark Up 41.4 250.5 Up 09:13:38 - 09:22:19 -2128
Ellensburg 09:17:59 -27.4 Dark Up 41.7 250.6 Up 09:13:38 - 09:22:19 -2169
Yakima 09:17:59 -27.8 Dark Up 41.8 251.0 Up 09:13:38 - 09:22:19 -2213
Toppenish/White Swan 09:17:59 -28.0 Dark Up 41.8 251.3 Up 09:13:38 - 09:22:19 -2239
PNWRO 09:17:56 -27.9 Dark Up 40.9 253.0 Up 09:13:35 - 09:22:16 -2301
The Dalles 09:18:00 -28.9 Dark Up 42.5 251.3 Up 09:13:40 - 09:22:21 -2310
Maupin 09:18:00 -29.2 Dark Up 42.6 251.7 Up 09:13:40 - 09:22:21 -2357
Sisters 09:18:01 -30.2 Dark Up 43.2 252.0 Up 09:13:41 - 09:22:22 -2444
Bend 09:18:00 -30.4 Dark Up 43.1 252.5 Up 09:13:40 - 09:22:21 -2474
Oregon Observatory 09:18:01 -30.5 Dark Up 43.2 252.5 Up 09:13:40 - 09:22:21 -2490
Chiloquin 09:18:01 -31.9 Dark Up 43.9 253.4 Up 09:13:41 - 09:22:22 -2626
Klamath Falls 09:18:02 -32.2 Dark Up 43.9 253.7 Up 09:13:41 - 09:22:22 -2664
Cedarville 09:17:59 -32.4 Dark Up 43.0 255.7 Up 09:13:39 - 09:22:20 -2767
Fall River/Burney 09:18:02 -33.2 Dark Up 44.0 255.2 Up 09:13:41 - 09:22:22 -2799
Greenville 09:18:01 -33.9 Dark Up 43.9 256.4 Up 09:13:41 - 09:22:22 -2905
Gimple 09:18:01 -33.9 Dark Up 43.8 256.5 Up 09:13:40 - 09:22:21 -2907
Quincy 09:18:01 -34.1 Dark Up 43.9 256.6 Up 09:13:41 - 09:22:22 -2927
Portola 09:18:00 -34.1 Dark Up 43.6 257.1 Up 09:13:40 - 09:22:21 -2949
Reno 09:18:00 -34.2 Dark Up 43.2 257.8 Up 09:13:39 - 09:22:20 -2989
Carson City 09:17:59 -34.5 Dark Up 43.2 258.2 Up 09:13:39 - 09:22:20 -3028
Dunrhomin 09:17:36 -28.0 Dark Up 32.0 267.8 Up 09:13:15 - 09:21:56 -3056
Gardnerville 09:17:59 -34.7 Dark Up 43.2 258.4 Up 09:13:39 - 09:22:20 -3056
Yerington 09:17:58 -34.5 Dark Up 42.8 258.9 Up 09:13:38 - 09:22:19 -3060
Nikitin 09:17:35 -28.2 Dark Up 32.0 267.8 Up 09:13:14 - 09:21:55 -3076
CU-SBO 09:17:35 -28.3 Dark Up 32.1 267.8 Up 09:13:15 - 09:21:56 -3083
Hawthorne 09:17:57 -34.8 Dark Up 42.5 259.7 Up 09:13:37 - 09:22:18 -3119
Lee Vining 09:17:59 -35.4 Dark Up 42.9 259.8 Up 09:13:38 - 09:22:19 -3173
Bishop 09:17:58 -35.7 Dark Up 42.5 260.9 Up 09:13:37 - 09:22:18 -3250
Beatty 09:17:54 -35.6 Dark Up 41.3 262.5 Up 09:13:34 - 09:22:15 -3325
Patrick 09:17:51 -35.8 Dark Up 39.1 265.6 Up 09:13:30 - 09:22:11 -3527
Laughlin/Bullhead City 09:17:52 -36.3 Dark Up 39.7 265.4 Up 09:13:31 - 09:22:12 -3545
Wildwood 09:18:00 -38.8 Dark Up 43.1 263.8 Up 09:13:39 - 09:22:20 -3603
Lake Havasu City 09:17:51 -36.8 Dark Up 39.5 266.1 Up 09:13:31 - 09:22:12 -3622
Idyllwild 09:17:56 -38.4 Dark Up 41.6 265.3 Up 09:13:36 - 09:22:17 -3672
George/Scottsdale 09:17:47 -36.4 Dark Up 37.6 268.2 Up 09:13:27 - 09:22:08 -3735
Calipatria 09:17:54 -38.5 Dark Up 40.6 266.5 Up 09:13:34 - 09:22:15 -3755
Yuma 09:17:53 -38.5 Dark Up 39.9 267.4 Up 09:13:33 - 09:22:14 -3815

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 342842, (2028/08/16 09:21UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 25.09 115
Tarazed        19:46:15.6 +10:36:48  2.7  7.88 135
7Del Sge       19:47:23.3 +18:32:04  3.8  0.59 128
PPM 136883     19:44:31.6 +18:35:20  8.5  0.13 129
342842         19:44:53.4 +18:29:15 10.9       129
Positions are for J2000

Event circumstances last updated at 2024/03/07 04:40:34 UT

Marc W. Buie, Southwest Research Institute

RECON