RECON: TNO occultation with 33340

Event between (33340) 98VG44 and star UC4-558-035961 with event index number of 95372

Geocentric closest approach at 2018/01/02 12:26:57 UTC

J2000 position of star is 06:54:08.5 +21:30:03
Equinox of date position of star is 06:55:07.5 +21:28:45
Stellar brightness R=16.2
Star is 6 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 29.5 AU from the Sun and 28.5 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 184 seconds.
The 1-sigma cross-track error in the shadow position is 1226 km.
The sky-plane scale is 20649.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 12.5 sec chord
Diameter=123.3 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 33340, (2018/01/02 12:27UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.0 +27:58:53  1.1 13.31  10
Alhena         06:38:45.1 +16:22:57  1.9  6.41  10
36 Gem         06:52:37.7 +21:44:18  5.3  0.66   6
PPM 096714     06:55:25.7 +21:08:13  7.8  0.34   5
PPM 096689     06:54:33.2 +21:29:51  9.9  0.16   6
33340          06:55:13.1 +21:28:38 16.2         5
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 4.9 sigma about the mid-time.
The median site spacing is 15.8 km RECON observability=1.0 and success probability=15.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 12:24:36 -32.8 Dark Up 32.1 266.4 Up 12:09:36 - 12:39:36 2380
Tonasket 12:24:35 -32.8 Dark Up 32.2 266.6 Up 12:09:35 - 12:39:35 2363
Okanogan 12:24:34 -33.0 Dark Up 32.3 266.7 Up 12:09:34 - 12:39:34 2335
Brewster 12:24:33 -33.1 Dark Up 32.4 266.7 Up 12:09:33 - 12:39:33 2309
Manson/Chelan 12:24:33 -33.4 Dark Up 32.7 266.5 Up 12:09:33 - 12:39:33 2283
Entiat 12:24:32 -33.4 Dark Up 32.8 266.6 Up 12:09:32 - 12:39:32 2265
Wenatchee 12:24:32 -33.5 Dark Up 32.8 266.7 Up 12:09:32 - 12:39:32 2243
Ellensburg 12:24:31 -33.7 Dark Up 33.0 266.8 Up 12:09:31 - 12:39:31 2206
Pasco 12:24:27 -32.7 Dark Up 32.1 268.3 Up 12:09:27 - 12:39:27 2190
PNWRO 12:24:26 -32.5 Dark Up 31.9 268.6 Up 12:09:26 - 12:39:26 2178
Yakima 12:24:30 -33.7 Dark Up 33.0 267.0 Up 12:09:30 - 12:39:30 2174
Toppenish/White Swan 12:24:29 -33.6 Dark Up 32.9 267.3 Up 12:09:29 - 12:39:29 2163
George/Umatilla 12:24:26 -32.9 Dark Up 32.2 268.4 Up 12:09:26 - 12:39:26 2158
Niwot 12:23:53 -22.0 Dark Up 21.6 280.5 Low 12:08:53 - 12:38:53 2152
Goldendale 12:24:28 -33.9 Dark Up 33.3 267.4 Up 12:09:28 - 12:39:28 2108
The Dalles 12:24:27 -34.1 Dark Up 33.5 267.2 Up 12:09:27 - 12:39:27 2080
Maupin 12:24:26 -34.1 Dark Up 33.5 267.6 Up 12:09:26 - 12:39:26 2051
Madras/Culver 12:24:24 -34.1 Dark Up 33.5 267.9 Up 12:09:24 - 12:39:24 2007
Redmond 12:24:23 -34.2 Dark Up 33.6 268.1 Up 12:09:23 - 12:39:23 1977
Sisters 12:24:23 -34.4 Dark Up 33.9 267.8 Up 12:09:23 - 12:39:23 1967
Bend 12:24:22 -34.3 Dark Up 33.7 268.1 Up 12:09:22 - 12:39:22 1956
Oregon Observatory 12:24:22 -34.4 Dark Up 33.8 268.2 Up 12:09:22 - 12:39:22 1938
La Pine/Gilchrist 12:24:22 -34.4 Dark Up 33.9 268.3 Up 12:09:22 - 12:39:22 1920
North Lake 12:24:19 -34.0 Dark Up 33.4 269.0 Up 12:09:19 - 12:39:19 1903
Paisley 12:24:17 -33.7 Dark Up 33.2 269.6 Up 12:09:17 - 12:39:17 1870
Lakeview 12:24:15 -33.6 Dark Up 33.1 270.0 Up 12:09:15 - 12:39:15 1835
Chiloquin 12:24:18 -34.7 Dark Up 34.2 268.8 Up 12:09:18 - 12:39:18 1819
Klamath Falls 12:24:17 -34.6 Dark Up 34.1 269.0 Up 12:09:17 - 12:39:17 1794
Cedarville 12:24:13 -33.4 Dark Up 32.9 270.6 Up 12:09:13 - 12:39:13 1787
Tulelake 12:24:16 -34.4 Dark Up 33.9 269.4 Up 12:09:16 - 12:39:16 1781
Fall River/Burney 12:24:13 -34.3 Dark Up 33.8 270.1 Up 12:09:13 - 12:39:13 1709
Susanville 12:24:10 -33.7 Dark Up 33.3 271.0 Up 12:09:10 - 12:39:10 1680
Greenville 12:24:10 -34.0 Dark Up 33.5 271.0 Up 12:09:10 - 12:39:10 1647
Portola 12:24:08 -33.6 Dark Up 33.1 271.5 Up 12:09:08 - 12:39:08 1635
Reno 12:24:06 -33.1 Dark Up 32.6 272.0 Up 12:09:06 - 12:39:06 1634
Quincy 12:24:09 -33.9 Dark Up 33.5 271.1 Up 12:09:09 - 12:39:09 1630
Yerington 12:24:03 -32.5 Dark Up 32.1 272.8 Up 12:09:03 - 12:39:03 1608
Carson City 12:24:05 -33.0 Dark Up 32.6 272.3 Up 12:09:05 - 12:39:05 1604
Tonopah 12:23:58 -30.9 Dark Up 30.5 274.5 Up 12:08:58 - 12:38:58 1594
Hawthorne 12:24:01 -32.1 Dark Up 31.7 273.4 Up 12:09:01 - 12:39:01 1586
Gardnerville 12:24:04 -33.0 Dark Up 32.6 272.5 Up 12:09:04 - 12:39:04 1585
Lee Vining 12:24:00 -32.4 Dark Up 32.0 273.5 Up 12:09:00 - 12:39:00 1523
Indian Springs 12:23:52 -29.6 Dark Up 29.2 276.2 Low 12:08:52 - 12:38:52 1519
Beatty 12:23:54 -30.5 Dark Up 30.1 275.4 Up 12:08:54 - 12:38:54 1510
Henderson 12:23:49 -28.9 Dark Up 28.6 276.9 Low 12:08:49 - 12:38:49 1497
Bishop 12:23:57 -31.8 Dark Up 31.4 274.2 Up 12:08:57 - 12:38:57 1495
Patrick 12:23:46 -28.0 Dark Up 27.6 277.8 Low 12:08:46 - 12:38:46 1481
DCO 12:23:45 -27.3 Dark Up 27.0 278.3 Low 12:08:45 - 12:38:45 1480
Kingman/Dolan Springs 12:23:46 -28.1 Dark Up 27.8 277.8 Low 12:08:46 - 12:38:46 1456
Searchlight/Boulder City 12:23:47 -28.8 Dark Up 28.5 277.2 Low 12:08:47 - 12:38:47 1450
Lone Pine 12:23:55 -31.5 Dark Up 31.1 274.9 Up 12:08:55 - 12:38:55 1441
Laughlin/Bullhead City 12:23:46 -28.5 Dark Up 28.2 277.5 Low 12:08:46 - 12:38:46 1436
Mohave Valley 12:23:45 -28.4 Dark Up 28.1 277.7 Low 12:08:45 - 12:38:45 1412
Lake Havasu City 12:23:44 -28.2 Dark Up 27.9 278.0 Low 12:08:44 - 12:38:44 1387
Parker 12:23:43 -28.1 Dark Up 27.8 278.2 Low 12:08:43 - 12:38:43 1357
Blythe 12:23:42 -28.3 Dark Up 28.0 278.3 Low 12:08:42 - 12:38:42 1301
CPSLO 12:23:55 -33.4 Dark Up 33.1 274.3 Up 12:08:55 - 12:38:55 1240
Idyllwild 12:23:45 -30.0 Dark Up 29.7 277.2 Low 12:08:45 - 12:38:45 1238
Calipatria 12:23:42 -29.0 Dark Up 28.7 278.2 Low 12:08:42 - 12:38:42 1225
Yuma 12:23:40 -28.1 Dark Up 27.9 278.8 Low 12:08:40 - 12:38:40 1218
Wildwood 12:23:49 -31.6 Dark Up 31.3 276.1 Up 12:08:49 - 12:38:49 1204

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 33340, (2018/01/02 12:27UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.2 +28:01:34  1.1 13.31  10
Alhena         06:37:42.8 +16:23:57  1.9  6.41  10
36 Gem         06:51:33.0 +21:45:39  5.3  0.66   6
PPM 096714     06:54:21.3 +21:09:39  7.8  0.34   5
PPM 096689     06:53:28.6 +21:31:15  9.9  0.16   6
33340          06:54:08.5 +21:30:03 16.2         6
Positions are for J2000

Event circumstances last updated at 2016/06/15 16:32:53 UT

Marc W. Buie, Southwest Research Institute

RECON