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 12:26:56 UTC

J2000 position of star is 06:54:08.5 +21:30:03
Equinox of date position of star is 06:55:12.8 +21:28:38
Stellar brightness R=16.2, use SENSEUP=128
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 270 seconds.
The 1-sigma cross-track error in the shadow position is 1426 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         07:46:24.9 +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     06:55:25.8 +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 3.3 sigma about the mid-time.
The median site spacing is 15.2 km RECON observability=1.0 and success probability=15.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 12:24:35 -32.8 Dark Up 32.1 266.4 Up 12:09:35 - 12:39:35 2372
Tonasket 12:24:35 -32.8 Dark Up 32.2 266.6 Up 12:09:35 - 12:39:35 2355
Okanogan 12:24:33 -33.0 Dark Up 32.3 266.7 Up 12:09:33 - 12:39:33 2326
Brewster 12:24:33 -33.1 Dark Up 32.4 266.7 Up 12:09:33 - 12:39:33 2301
Manson/Chelan 12:24:33 -33.4 Dark Up 32.7 266.5 Up 12:09:33 - 12:39:33 2275
Entiat 12:24:32 -33.4 Dark Up 32.8 266.6 Up 12:09:32 - 12:39:32 2257
Wenatchee 12:24:31 -33.5 Dark Up 32.8 266.7 Up 12:09:31 - 12:39:31 2235
Ellensburg 12:24:30 -33.7 Dark Up 33.0 266.8 Up 12:09:30 - 12:39:30 2197
Pasco 12:24:26 -32.7 Dark Up 32.1 268.3 Up 12:09:26 - 12:39:26 2182
PNWRO 12:24:25 -32.5 Dark Up 31.9 268.6 Up 12:09:25 - 12:39:25 2169
Yakima 12:24:29 -33.7 Dark Up 33.1 267.0 Up 12:09:29 - 12:39:29 2166
Toppenish/White Swan 12:24:28 -33.6 Dark Up 32.9 267.3 Up 12:09:28 - 12:39:28 2154
George/Umatilla 12:24:25 -32.9 Dark Up 32.2 268.4 Up 12:09:25 - 12:39:25 2150
Niwot 12:23:53 -22.0 Dark Up 21.6 280.5 Low 12:08:53 - 12:38:53 2141
Goldendale 12:24:27 -33.9 Dark Up 33.3 267.3 Up 12:09:27 - 12:39:27 2099
The Dalles 12:24:26 -34.1 Dark Up 33.5 267.2 Up 12:09:26 - 12:39:26 2071
Maupin 12:24:25 -34.1 Dark Up 33.5 267.6 Up 12:09:25 - 12:39:25 2042
Madras/Culver 12:24:23 -34.1 Dark Up 33.5 267.9 Up 12:09:23 - 12:39:23 1998
Redmond 12:24:22 -34.2 Dark Up 33.6 268.1 Up 12:09:22 - 12:39:22 1968
Sisters 12:24:22 -34.5 Dark Up 33.9 267.8 Up 12:09:22 - 12:39:22 1958
Bend 12:24:22 -34.3 Dark Up 33.7 268.1 Up 12:09:22 - 12:39:22 1947
Oregon Observatory 12:24:21 -34.4 Dark Up 33.8 268.2 Up 12:09:21 - 12:39:21 1929
La Pine/Gilchrist 12:24:21 -34.4 Dark Up 33.9 268.3 Up 12:09:21 - 12:39:21 1911
North Lake 12:24:18 -34.0 Dark Up 33.4 269.0 Up 12:09:18 - 12:39:18 1894
Paisley 12:24:16 -33.7 Dark Up 33.2 269.6 Up 12:09:16 - 12:39:16 1860
Lakeview 12:24:14 -33.6 Dark Up 33.1 270.0 Up 12:09:14 - 12:39:14 1825
Chiloquin 12:24:18 -34.7 Dark Up 34.2 268.7 Up 12:09:18 - 12:39:18 1810
Klamath Falls 12:24:16 -34.6 Dark Up 34.1 269.0 Up 12:09:16 - 12:39:16 1784
Cedarville 12:24:12 -33.4 Dark Up 32.9 270.6 Up 12:09:12 - 12:39:12 1777
Tulelake 12:24:15 -34.4 Dark Up 33.9 269.4 Up 12:09:15 - 12:39:15 1772
Fall River/Burney 12:24:12 -34.3 Dark Up 33.8 270.1 Up 12:09:12 - 12:39:12 1699
Susanville 12:24:09 -33.7 Dark Up 33.3 271.0 Up 12:09:09 - 12:39:09 1670
Gimple 12:24:09 -33.9 Dark Up 33.4 271.0 Up 12:09:09 - 12:39:09 1640
Greenville 12:24:09 -34.0 Dark Up 33.5 271.0 Up 12:09:09 - 12:39:09 1637
Portola 12:24:07 -33.6 Dark Up 33.1 271.5 Up 12:09:07 - 12:39:07 1625
Reno 12:24:05 -33.1 Dark Up 32.6 272.0 Up 12:09:05 - 12:39:05 1624
Quincy 12:24:08 -33.9 Dark Up 33.5 271.1 Up 12:09:08 - 12:39:08 1621
Yerington 12:24:03 -32.5 Dark Up 32.1 272.8 Up 12:09:03 - 12:39:03 1598
Carson City 12:24:04 -33.0 Dark Up 32.6 272.3 Up 12:09:04 - 12:39:04 1594
Tonopah 12:23:57 -30.9 Dark Up 30.5 274.5 Up 12:08:57 - 12:38:57 1583
Hawthorne 12:24:01 -32.1 Dark Up 31.7 273.4 Up 12:09:01 - 12:39:01 1576
Gardnerville 12:24:03 -33.0 Dark Up 32.6 272.5 Up 12:09:03 - 12:39:03 1575
Lee Vining 12:24:00 -32.4 Dark Up 32.0 273.5 Up 12:09:00 - 12:39:00 1512
Indian Springs 12:23:51 -29.6 Dark Up 29.2 276.2 Low 12:08:51 - 12:38:51 1509
Beatty 12:23:53 -30.5 Dark Up 30.1 275.4 Up 12:08:53 - 12:38:53 1500
Henderson 12:23:49 -28.9 Dark Up 28.6 276.9 Low 12:08:49 - 12:38:49 1487
Bishop 12:23:57 -31.8 Dark Up 31.4 274.2 Up 12:08:57 - 12:38:57 1485
Patrick 12:23:46 -28.0 Dark Up 27.6 277.8 Low 12:08:46 - 12:38:46 1471
DCO 12:23:44 -27.3 Dark Up 27.0 278.3 Low 12:08:44 - 12:38:44 1469
Kingman/Dolan Springs 12:23:45 -28.1 Dark Up 27.8 277.8 Low 12:08:45 - 12:38:45 1445
Searchlight/Boulder City 12:23:47 -28.8 Dark Up 28.5 277.2 Low 12:08:47 - 12:38:47 1439
Lone Pine 12:23:54 -31.5 Dark Up 31.1 274.9 Up 12:08:54 - 12:38:54 1431
Laughlin/Bullhead City 12:23:46 -28.5 Dark Up 28.2 277.5 Low 12:08:46 - 12:38:46 1426
Mohave Valley 12:23:45 -28.5 Dark Up 28.1 277.7 Low 12:08:45 - 12:38:45 1402
Lake Havasu City 12:23:44 -28.2 Dark Up 27.9 278.0 Low 12:08:44 - 12:38:44 1376
Parker 12:23:43 -28.1 Dark Up 27.8 278.2 Low 12:08:43 - 12:38:43 1347
Blythe 12:23:42 -28.3 Dark Up 28.0 278.3 Low 12:08:42 - 12:38:42 1291
CPSLO 12:23:55 -33.4 Dark Up 33.1 274.3 Up 12:08:55 - 12:38:55 1230
Idyllwild 12:23:45 -30.0 Dark Up 29.7 277.2 Low 12:08:45 - 12:38:45 1227
Calipatria 12:23:42 -29.0 Dark Up 28.7 278.2 Low 12:08:42 - 12:38:42 1215
Yuma 12:23:39 -28.1 Dark Up 27.9 278.8 Low 12:08:39 - 12:38:39 1208
Wildwood 12:23:48 -31.6 Dark Up 31.3 276.1 Up 12:08:48 - 12:38:48 1193

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         07:45:18.1 +28:01:33  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 2017/12/02 17:10:03 UT

Marc W. Buie, Southwest Research Institute

RECON