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 04:53:17 UTC

J2000 position of star is 20:08:50.0 +65:11:40
Equinox of date position of star is 20:09:01.1 +65:14:48
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 24 seconds.
The 1-sigma cross-track error in the shadow position is 1010 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 18.0 km RECON observability=1.0 and success probability=20.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:54:22 -15.1 AT Up 69.8 28.1 Up 04:51:54 - 04:56:51 -986
Tonasket 04:54:23 -15.3 AT Up 69.6 27.8 Up 04:51:54 - 04:56:51 -1001
Manson/Chelan 04:54:26 -15.5 AT Up 68.7 27.3 Up 04:51:57 - 04:56:54 -1007
Okanogan 04:54:24 -15.4 AT Up 69.3 27.5 Up 04:51:55 - 04:56:52 -1013
Entiat 04:54:26 -15.6 AT Up 68.4 27.1 Up 04:51:57 - 04:56:54 -1017
Brewster 04:54:25 -15.5 AT Up 69.0 27.3 Up 04:51:56 - 04:56:53 -1017
Wenatchee 04:54:26 -15.7 AT Up 68.2 26.9 Up 04:51:57 - 04:56:54 -1027
Ellensburg 04:54:26 -15.8 AT Up 67.7 26.6 Up 04:51:57 - 04:56:54 -1041
Yakima 04:54:26 -16.1 AT Up 67.4 26.2 Up 04:51:57 - 04:56:54 -1068
Toppenish/White Swan 04:54:26 -16.3 AT Up 67.2 25.8 Up 04:51:57 - 04:56:54 -1093
The Dalles 04:54:26 -16.4 AT Up 66.3 25.6 Up 04:51:57 - 04:56:54 -1104
Goldendale 04:54:26 -16.5 AT Up 66.6 25.6 Up 04:51:57 - 04:56:54 -1108
Maupin 04:54:26 -16.8 AT Up 66.0 25.2 Up 04:51:57 - 04:56:54 -1142
Pasco 04:54:26 -17.1 AT Up 67.5 24.7 Up 04:51:57 - 04:56:54 -1177
Madras/Culver 04:54:26 -17.1 AT Up 65.4 24.7 Up 04:51:57 - 04:56:54 -1183
Sisters 04:54:26 -17.1 AT Up 65.0 24.7 Up 04:51:57 - 04:56:54 -1186
George/Umatilla 04:54:26 -17.2 AT Up 67.1 24.6 Up 04:51:57 - 04:56:54 -1187
PNWRO 04:54:26 -17.4 AT Up 67.3 24.3 Up 04:51:57 - 04:56:54 -1208
Redmond 04:54:26 -17.3 AT Up 65.1 24.4 Up 04:51:57 - 04:56:54 -1209
Bend 04:54:26 -17.4 AT Up 64.9 24.3 Up 04:51:57 - 04:56:54 -1219
Oregon Observatory 04:54:26 -17.4 AT Up 64.7 24.2 Up 04:51:57 - 04:56:54 -1227
La Pine/Gilchrist 04:54:26 -17.5 AT Up 64.5 24.1 Up 04:51:57 - 04:56:54 -1241
North Lake 04:54:26 -18.1 Dark Up 64.2 23.3 Up 04:51:57 - 04:56:54 -1307
Chiloquin 04:54:26 -18.0 AT Up 63.3 23.4 Up 04:51:57 - 04:56:54 -1317
Fall River/Burney 04:54:44 -19.3 Dark Up 62.1 21.9 Up 04:52:16 - 04:57:13 -1338
Klamath Falls 04:54:26 -18.3 Dark Up 63.0 23.1 Up 04:51:57 - 04:56:54 -1350
Paisley 04:54:26 -18.7 Dark Up 63.8 22.6 Up 04:51:57 - 04:56:54 -1372
Tulelake 04:54:26 -18.6 Dark Up 62.9 22.7 Up 04:51:57 - 04:56:54 -1388
Lakeview 04:54:26 -19.1 Dark Up 63.4 22.1 Up 04:51:57 - 04:56:54 -1424
Greenville 04:54:46 -20.1 Dark Up 61.4 21.0 Up 04:52:17 - 04:57:14 -1424
Susanville 04:54:44 -20.1 Dark Up 61.7 21.0 Up 04:52:16 - 04:57:13 -1429
Gimple 04:54:45 -20.2 Dark Up 61.4 21.0 Up 04:52:17 - 04:57:14 -1430
Quincy 04:54:46 -20.2 Dark Up 61.2 20.9 Up 04:52:18 - 04:57:15 -1436
Portola 04:54:46 -20.6 Dark Up 61.2 20.5 Up 04:52:17 - 04:57:14 -1478
Cedarville 04:54:26 -19.6 Dark Up 62.9 21.5 Up 04:51:57 - 04:56:54 -1488
Reno 04:54:45 -21.2 Dark Up 61.1 19.9 Up 04:52:17 - 04:57:14 -1541
Carson City 04:54:46 -21.4 Dark Up 60.8 19.6 Up 04:52:18 - 04:57:15 -1564
Gardnerville 04:54:47 -21.6 Dark Up 60.6 19.5 Up 04:52:19 - 04:57:16 -1582
Yerington 04:54:46 -21.9 Dark Up 60.8 19.1 Up 04:52:17 - 04:57:14 -1621
Lee Vining 04:54:48 -22.6 Dark Up 59.8 18.5 Up 04:52:20 - 04:57:17 -1687
Hawthorne 04:54:46 -22.5 Dark Up 60.5 18.5 Up 04:52:18 - 04:57:15 -1687
CPSLO 04:54:56 -23.3 Dark Up 56.9 18.1 Up 04:52:28 - 04:57:25 -1731
Bishop 04:54:48 -23.4 Dark Up 59.4 17.7 Up 04:52:20 - 04:57:17 -1776
Tonopah 04:54:45 -23.7 Dark Up 60.4 17.2 Up 04:52:17 - 04:57:14 -1817
Lone Pine 04:54:50 -24.1 Dark Up 58.8 17.1 Up 04:52:21 - 04:57:18 -1847
Beatty 04:54:47 -24.7 Dark Up 59.4 16.3 Up 04:52:19 - 04:57:16 -1922
Wildwood 04:54:56 -25.4 Dark Up 56.2 16.3 Up 04:52:27 - 04:57:24 -1959
Indian Springs 04:54:46 -25.6 Dark Up 59.3 15.4 Up 04:52:17 - 04:57:14 -2020
Henderson 04:54:46 -26.3 Dark Up 58.9 14.7 Up 04:52:18 - 04:57:15 -2103
Idyllwild 04:54:54 -26.8 Dark Up 56.3 14.9 Up 04:52:25 - 04:57:22 -2123
Searchlight/Boulder City 04:54:47 -26.8 Dark Up 58.4 14.4 Up 04:52:19 - 04:57:16 -2145
Laughlin/Bullhead City 04:54:47 -27.2 Dark Up 58.1 14.1 Up 04:52:19 - 04:57:16 -2188
Mohave Valley 04:54:48 -27.4 Dark Up 57.9 13.9 Up 04:52:19 - 04:57:16 -2206
Patrick 04:54:45 -27.4 Dark Up 58.5 13.7 Up 04:52:17 - 04:57:14 -2223
Kingman/Dolan Springs 04:54:46 -27.5 Dark Up 58.3 13.7 Up 04:52:18 - 04:57:15 -2224
Calipatria 04:54:53 -28.0 Dark Up 56.0 13.9 Up 04:52:25 - 04:57:22 -2248
Lake Havasu City 04:54:48 -27.8 Dark Up 57.5 13.6 Up 04:52:20 - 04:57:17 -2249
Parker 04:54:49 -28.1 Dark Up 57.2 13.5 Up 04:52:20 - 04:57:17 -2274
Blythe 04:54:51 -28.2 Dark Up 56.6 13.5 Up 04:52:22 - 04:57:19 -2286
DCO 04:54:45 -28.1 Dark Up 58.4 13.0 Up 04:52:17 - 04:57:14 -2293
Yuma 04:54:52 -28.8 Dark Up 55.7 13.2 Up 04:52:24 - 04:57:21 -2341
Niwot 04:54:21 -28.4 Dark Up 64.4 8.3 Up 04:51:52 - 04:56:49 -2460

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 +64:36:09  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 2017/09/01 17:01:17 UT

Marc W. Buie, Southwest Research Institute

RECON