RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star UC4-776-040469 with event index number of 209439

Geocentric closest approach at 2019/08/17 04:53:14 UTC

J2000 position of star is 20:08:50.0 +65:11:40
Equinox of date position of star is 20:09:01.2 +65:14:51
Stellar brightness R=12.0, use SENSEUP=16
Star is 83 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=20.7

[RECON map]
TNO is 12.6 AU from the Sun and 12.4 AU from the Earth.
The TNO is moving 33.6 km/sec on the sky relative to the star, or, 13.4 arcsec/hr.
The 1-sigma error in the time of the event is 23 seconds.
The 1-sigma cross-track error in the shadow position is 944 km.
The sky-plane scale is 9027.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.5 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2019/08/17 04:53UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:06.1 +45:21:04  1.3 20.41  64
Alderamin      21:19:02.8 +62:40:09  2.4  8.07  76
PPM 021951     20:04:59.0 +63:56:49  6.2  1.38  82
PPM 021996     20:08:01.4 +64:39:38  8.5  0.60  82
PPM 021982     20:06:50.3 +64:56:06  9.6  0.39  82
PPM 022034     20:11:55.1 +65:19:56 11.2  0.31  82
342842         20:09:02.3 +65:15:09 12.0        83
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 17.1 km RECON observability=1.0 and success probability=22.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:54:19 -15.1 AT Up 69.8 28.1 Up 04:51:57 - 04:56:42 -812
Tonasket 04:54:20 -15.2 AT Up 69.6 27.8 Up 04:51:57 - 04:56:42 -827
Manson/Chelan 04:54:23 -15.4 AT Up 68.7 27.3 Up 04:52:00 - 04:56:45 -832
Okanogan 04:54:21 -15.4 AT Up 69.3 27.5 Up 04:51:59 - 04:56:44 -838
Entiat 04:54:23 -15.6 AT Up 68.4 27.1 Up 04:52:01 - 04:56:46 -842
Brewster 04:54:22 -15.5 AT Up 69.0 27.3 Up 04:52:00 - 04:56:45 -843
Wenatchee 04:54:24 -15.7 AT Up 68.2 26.9 Up 04:52:02 - 04:56:47 -851
Ellensburg 04:54:26 -15.8 AT Up 67.7 26.6 Up 04:52:03 - 04:56:48 -862
Yakima 04:54:26 -16.1 AT Up 67.4 26.2 Up 04:52:03 - 04:56:48 -886
Toppenish/White Swan 04:54:26 -16.3 AT Up 67.2 25.8 Up 04:52:03 - 04:56:48 -910
The Dalles 04:54:26 -16.4 AT Up 66.3 25.6 Up 04:52:03 - 04:56:48 -914
Goldendale 04:54:26 -16.5 AT Up 66.6 25.6 Up 04:52:03 - 04:56:48 -920
Maupin 04:54:26 -16.8 AT Up 66.0 25.2 Up 04:52:03 - 04:56:48 -951
Madras/Culver 04:54:26 -17.1 AT Up 65.4 24.7 Up 04:52:03 - 04:56:48 -989
Sisters 04:54:26 -17.1 AT Up 65.0 24.7 Up 04:52:03 - 04:56:48 -990
Pasco 04:54:26 -17.1 AT Up 67.5 24.7 Up 04:52:03 - 04:56:48 -999
George/Umatilla 04:54:26 -17.2 AT Up 67.1 24.6 Up 04:52:03 - 04:56:48 -1006
Redmond 04:54:26 -17.3 AT Up 65.1 24.4 Up 04:52:03 - 04:56:48 -1014
Bend 04:54:26 -17.4 AT Up 64.9 24.3 Up 04:52:03 - 04:56:48 -1023
PNWRO 04:54:26 -17.4 AT Up 67.3 24.3 Up 04:52:03 - 04:56:48 -1028
Oregon Observatory 04:54:26 -17.4 AT Up 64.7 24.2 Up 04:52:03 - 04:56:48 -1030
La Pine/Gilchrist 04:54:26 -17.5 AT Up 64.5 24.1 Up 04:52:03 - 04:56:48 -1043
North Lake 04:54:26 -18.1 Dark Up 64.2 23.3 Up 04:52:03 - 04:56:48 -1110
Chiloquin 04:54:26 -18.0 AT Up 63.3 23.4 Up 04:52:03 - 04:56:48 -1117
Klamath Falls 04:54:26 -18.3 Dark Up 63.0 23.1 Up 04:52:03 - 04:56:48 -1150
Paisley 04:54:26 -18.7 Dark Up 63.8 22.6 Up 04:52:03 - 04:56:48 -1174
Tulelake 04:54:26 -18.6 Dark Up 62.9 22.7 Up 04:52:03 - 04:56:48 -1188
Lakeview 04:54:26 -19.1 Dark Up 63.4 22.1 Up 04:52:03 - 04:56:48 -1226
Quincy 04:54:43 -20.2 Dark Up 61.2 20.9 Up 04:52:21 - 04:57:06 -1258
Fall River/Burney 04:54:26 -19.2 Dark Up 62.1 22.0 Up 04:52:03 - 04:56:48 -1270
Cedarville 04:54:26 -19.6 Dark Up 62.9 21.5 Up 04:52:03 - 04:56:48 -1289
Susanville 04:54:26 -20.1 Dark Up 61.7 21.1 Up 04:52:03 - 04:56:48 -1360
Greenville 04:54:26 -20.1 Dark Up 61.4 21.1 Up 04:52:03 - 04:56:48 -1370
Gimple 04:54:26 -20.1 Dark Up 61.4 21.0 Up 04:52:03 - 04:56:48 -1374
Carson City 04:54:44 -21.4 Dark Up 60.8 19.7 Up 04:52:21 - 04:57:06 -1386
Gardnerville 04:54:44 -21.6 Dark Up 60.6 19.5 Up 04:52:22 - 04:57:07 -1404
Portola 04:54:26 -20.6 Dark Up 61.2 20.5 Up 04:52:03 - 04:56:48 -1421
Reno 04:54:26 -21.1 Dark Up 61.1 19.9 Up 04:52:03 - 04:56:48 -1475
Lee Vining 04:54:45 -22.6 Dark Up 59.8 18.5 Up 04:52:23 - 04:57:08 -1508
Hawthorne 04:54:44 -22.5 Dark Up 60.5 18.5 Up 04:52:21 - 04:57:06 -1509
CPSLO 04:54:54 -23.3 Dark Up 56.9 18.1 Up 04:52:31 - 04:57:16 -1552
Yerington 04:54:26 -21.9 Dark Up 60.7 19.2 Up 04:52:03 - 04:56:48 -1554
Bishop 04:54:46 -23.4 Dark Up 59.4 17.7 Up 04:52:23 - 04:57:08 -1597
Lone Pine 04:54:47 -24.1 Dark Up 58.8 17.1 Up 04:52:25 - 04:57:10 -1668
Tonopah 04:54:26 -23.6 Dark Up 60.3 17.3 Up 04:52:03 - 04:56:48 -1731
Beatty 04:54:44 -24.7 Dark Up 59.4 16.3 Up 04:52:22 - 04:57:07 -1744
Wildwood 04:54:53 -25.4 Dark Up 56.2 16.3 Up 04:52:30 - 04:57:15 -1780
Indian Springs 04:54:44 -25.6 Dark Up 59.3 15.4 Up 04:52:21 - 04:57:06 -1842
Henderson 04:54:44 -26.3 Dark Up 58.9 14.7 Up 04:52:21 - 04:57:06 -1925
Idyllwild 04:54:51 -26.8 Dark Up 56.3 14.9 Up 04:52:29 - 04:57:14 -1944
Searchlight/Boulder City 04:54:44 -26.8 Dark Up 58.4 14.4 Up 04:52:22 - 04:57:07 -1966
Laughlin/Bullhead City 04:54:44 -27.2 Dark Up 58.1 14.1 Up 04:52:22 - 04:57:07 -2010
Mohave Valley 04:54:45 -27.4 Dark Up 57.9 14.0 Up 04:52:23 - 04:57:08 -2028
Patrick 04:54:43 -27.4 Dark Up 58.5 13.7 Up 04:52:20 - 04:57:05 -2045
Kingman/Dolan Springs 04:54:44 -27.5 Dark Up 58.3 13.7 Up 04:52:21 - 04:57:06 -2046
Calipatria 04:54:50 -28.0 Dark Up 56.0 13.9 Up 04:52:28 - 04:57:13 -2069
Lake Havasu City 04:54:45 -27.8 Dark Up 57.5 13.6 Up 04:52:23 - 04:57:08 -2071
Parker 04:54:46 -28.1 Dark Up 57.2 13.5 Up 04:52:24 - 04:57:09 -2096
Blythe 04:54:48 -28.2 Dark Up 56.6 13.5 Up 04:52:25 - 04:57:10 -2107
Yuma 04:54:50 -28.8 Dark Up 55.7 13.2 Up 04:52:27 - 04:57:12 -2163
DCO 04:54:26 -28.0 Dark Up 58.3 13.1 Up 04:52:03 - 04:56:48 -2186
Niwot 04:54:19 -28.4 Dark Up 64.4 8.3 Up 04:51:56 - 04:56:41 -2285

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, (2019/08/17 04:53UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 20.41  64
Alderamin      21:18:35.2 +62:35:09  2.4  8.07  76
PPM 021951     20:04:44.5 +63:53:25  6.2  1.38  82
PPM 021996     20:07:48.0 +64:36:10  8.5  0.60  82
PPM 021982     20:06:37.6 +64:52:39  9.6  0.39  82
PPM 022034     20:11:42.6 +65:16:22 11.2  0.31  82
342842         20:08:50.0 +65:11:40 12.0        83
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:12:42 UT

Marc W. Buie, Southwest Research Institute

RECON