RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1040:15024310 with event index number of 2818662

Geocentric closest approach at 2029/08/07 05:53:23 UTC

J2000 position of star is 19:45:34.1 +14:37:29
Equinox of date position of star is 19:46:40.9 +14:41:06
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 140 degrees from the moon. Moon is 9% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 16.6 AU from the Sun and 15.8 AU from the Earth.
Apparent velocity is 31.6 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 51 seconds.
The 1-sigma cross-track error in the shadow position is 2408 km.
The sky-plane scale is 11475.1 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 2.4 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2029/08/07 05:53UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:56.4 +38:48:44  0.0 28.50 119
Tarazed        19:47:40.0 +10:41:15  2.7  4.02 143
PPM 136767     19:42:27.8 +13:53:11  5.8  1.35 141
PPM 136929     19:47:34.1 +14:49:08  8.5  0.20 139
342842         19:46:55.9 +14:41:54 14.6       139
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 27.6 km RECON observability=1.0 and success probability=4.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:52:50 -16.8 AT Down 52.6 159.8 Up 05:48:06 - 05:57:33 6748
Victoria 05:52:59 -17.4 AT Down 53.8 154.0 Up 05:48:16 - 05:57:43 6716
Peachland 05:52:51 -17.8 AT Down 53.6 160.4 Up 05:48:07 - 05:57:34 6661
Kelowna 05:52:50 -17.8 AT Down 53.5 160.9 Up 05:48:07 - 05:57:34 6657
Summerland 05:52:51 -17.9 AT Down 53.7 160.4 Up 05:48:07 - 05:57:34 6647
Penticton 05:52:50 -18.0 Dark Down 53.8 160.6 Up 05:48:06 - 05:57:33 6638
Oliver 05:52:51 -18.3 Dark Down 54.1 160.4 Up 05:48:08 - 05:57:35 6613
Anarchist Mountain Observatory 05:52:51 -18.6 Dark Down 54.3 160.7 Up 05:48:08 - 05:57:35 6594
Okanogan 05:52:53 -19.0 Dark Down 54.9 160.0 Up 05:48:10 - 05:57:37 6555
Brewster 05:52:53 -19.2 Dark Down 55.1 159.6 Up 05:48:10 - 05:57:37 6544
Manson/Chelan 05:52:55 -19.2 Dark Down 55.2 158.9 Up 05:48:11 - 05:57:38 6543
Wenatchee 05:52:56 -19.5 Dark Down 55.6 158.3 Up 05:48:13 - 05:57:40 6516
Ellensburg 05:52:58 -19.8 Dark Down 56.0 157.7 Up 05:48:14 - 05:57:41 6495
Yakima 05:52:58 -20.1 Dark Down 56.3 157.5 Up 05:48:15 - 05:57:42 6466
Toppenish/White Swan 05:52:58 -20.4 Dark Down 56.6 157.7 Up 05:48:15 - 05:57:42 6443
The Dalles 05:53:02 -20.7 Dark Down 57.1 155.9 Up 05:48:18 - 05:57:45 6418
Maupin 05:53:02 -21.1 Dark Down 57.5 155.8 Up 05:48:19 - 05:57:46 6383
PNWRO 05:52:56 -21.2 Dark Down 57.3 160.0 Up 05:48:12 - 05:57:39 6355
Sleaford 05:52:21 -19.6 Dark Down 52.5 182.9 Up 05:47:37 - 05:57:04 6342
Sisters 05:53:05 -21.6 Dark Down 58.1 154.4 Up 05:48:21 - 05:57:48 6338
Bend 05:53:05 -21.9 Dark Down 58.4 154.6 Up 05:48:21 - 05:57:48 6309
Oregon Observatory 05:53:05 -22.0 Dark Down 58.5 154.3 Up 05:48:22 - 05:57:49 6302
Chiloquin 05:53:09 -22.9 Dark Down 59.6 152.6 Up 05:48:25 - 05:57:52 6220
Klamath Falls 05:53:09 -23.2 Dark Down 59.9 152.5 Up 05:48:25 - 05:57:52 6190
Fall River/Burney 05:53:11 -24.3 Dark Down 61.1 152.2 Up 05:48:27 - 05:57:54 6082
Cedarville 05:53:07 -24.4 Dark Down 61.1 154.9 Up 05:48:24 - 05:57:51 6066
Greenville 05:53:12 -25.2 Dark Down 62.1 152.3 Up 05:48:28 - 05:57:55 5991
Gimple 05:53:12 -25.3 Dark Down 62.1 152.5 Up 05:48:28 - 05:57:55 5987
Quincy 05:53:12 -25.4 Dark Down 62.3 152.1 Up 05:48:29 - 05:57:56 5975
Portola 05:53:12 -25.7 Dark Down 62.5 153.0 Up 05:48:28 - 05:57:55 5943
Reno 05:53:11 -26.2 Dark Down 63.0 154.0 Up 05:48:27 - 05:57:54 5893
Carson City 05:53:11 -26.5 Dark Down 63.3 153.7 Up 05:48:27 - 05:57:54 5863
Gardnerville 05:53:11 -26.7 Dark Down 63.6 153.6 Up 05:48:28 - 05:57:55 5841
Yerington 05:53:10 -27.0 Dark Down 63.7 154.9 Up 05:48:27 - 05:57:54 5818
Hawthorne 05:53:10 -27.6 Dark Down 64.3 155.6 Up 05:48:26 - 05:57:53 5756
Lee Vining 05:53:12 -27.8 Dark Down 64.7 154.0 Up 05:48:28 - 05:57:55 5733
Bishop 05:53:12 -28.7 Dark Down 65.4 155.0 Up 05:48:28 - 05:57:55 5650
Beatty 05:53:08 -29.8 Dark Down 66.4 158.3 Up 05:48:25 - 05:57:52 5535
Wildwood 05:53:18 -31.2 Dark Down 68.3 151.2 Up 05:48:35 - 05:58:02 5384
Dunrhomin 05:52:36 -30.9 Dark Down 64.3 185.9 Up 05:47:52 - 05:57:19 5322
Nikitin 05:52:36 -31.0 Dark Down 64.5 185.9 Up 05:47:53 - 05:57:20 5307
CU-SBO 05:52:36 -31.1 Dark Down 64.5 185.7 Up 05:47:52 - 05:57:19 5304
Laughlin/Bullhead City 05:53:06 -32.2 Dark Down 68.6 162.1 Up 05:48:23 - 05:57:50 5286
Patrick 05:53:05 -32.3 Dark Down 68.5 164.1 Up 05:48:21 - 05:57:48 5274
Idyllwild 05:53:14 -32.4 Dark Down 69.3 155.4 Up 05:48:30 - 05:57:57 5262
Lake Havasu City 05:53:07 -32.9 Dark Down 69.3 162.3 Up 05:48:23 - 05:57:50 5215
Calipatria 05:53:12 -33.5 Dark Down 70.3 157.8 Up 05:48:29 - 05:57:56 5152
Yuma 05:53:11 -34.2 Dark Down 70.9 159.8 Up 05:48:28 - 05:57:55 5071
George/Scottsdale 05:53:02 -34.6 Dark Down 70.6 168.5 Up 05:48:18 - 05:57:45 5031

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, (2029/08/07 05:53UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:08  0.0 28.50 119
Tarazed        19:46:15.6 +10:36:48  2.7  4.02 143
PPM 136767     19:41:05.5 +13:48:57  5.8  1.35 141
PPM 136929     19:46:12.4 +14:44:41  8.5  0.20 139
342842         19:45:34.1 +14:37:29 14.6       139
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:41:43 UT

Marc W. Buie, Southwest Research Institute

RECON