RECON: TNO occultation with 00SR331

Event between 00SR331 and star UC4-545-033183 with event index number of 112995

Geocentric closest approach at 2018/04/18 03:21:27 UTC

J2000 position of star is 06:44:50.2 +18:48:33
Equinox of date position of star is 06:45:51.4 +18:47:25
Stellar brightness R=14.8, use SENSEUP=128
Star is 46 degrees from the moon. Moon is 6% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 32.3 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 14.6 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 882 seconds.
The 1-sigma cross-track error in the shadow position is 2692 km.
The sky-plane scale is 23655.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=106.2 km assuming a 5% albedo -- 7.3 sec chord
Diameter=43.3 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 00SR331, (2018/04/18 03:21UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:09.8 +07:24:32  0.4 16.60  35
Alhena         06:38:46.1 +16:22:56  1.9  2.95  44
PPM 123009     06:47:25.5 +18:49:02  6.5  0.36  46
PPM 122946     06:44:51.4 +18:38:11  8.1  0.29  45
PPM 122974     06:46:06.2 +18:41:32  9.4  0.11  46
00SR331        06:45:54.6 +18:47:21 14.8        46
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 1.0 sigma about the mid-time.
The median site spacing is 59.5 km RECON observability=0.1 and success probability=9.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 03:24:34 -5.7 CT Up 47.9 237.5 Up 03:09:34 - 03:39:34 109
Tonasket 03:24:34 -5.8 CT Up 48.0 237.7 Up 03:09:34 - 03:39:34 87
Okanogan 03:24:34 -5.8 CT Up 48.3 237.9 Up 03:09:34 - 03:39:34 54
Brewster 03:24:34 -5.8 CT Up 48.5 237.9 Up 03:09:34 - 03:39:34 27
Manson/Chelan 03:24:34 -5.7 CT Up 48.8 237.7 Up 03:09:34 - 03:39:34 9
Entiat 03:24:34 -5.7 CT Up 49.0 237.8 Up 03:09:34 - 03:39:34 -20
Wenatchee 03:24:34 -5.7 CT Up 49.2 237.9 Up 03:09:34 - 03:39:34 -46
Ellensburg 03:24:34 -5.8 CT Up 49.5 238.1 Up 03:09:34 - 03:39:34 -87
Yakima 03:24:36 -5.9 CT Up 49.8 238.5 Up 03:09:36 - 03:39:36 -126
Pasco 03:24:43 -7.0 CT Up 49.1 240.5 Up 03:09:43 - 03:39:43 -143
Toppenish/White Swan 03:24:37 -6.1 CT Up 49.8 238.9 Up 03:09:37 - 03:39:37 -145
PNWRO 03:24:45 -7.2 CT Up 49.0 241.0 Up 03:09:45 - 03:39:45 -163
George/Umatilla 03:24:43 -7.0 CT Up 49.3 240.6 Up 03:09:43 - 03:39:43 -177
Goldendale 03:24:37 -6.0 CT Up 50.3 239.0 Up 03:09:37 - 03:39:37 -202
The Dalles 03:24:36 -5.9 CT Up 50.6 238.8 Up 03:09:36 - 03:39:36 -228
Maupin 03:24:38 -6.1 CT Up 50.8 239.4 Up 03:09:38 - 03:39:38 -268
Madras/Culver 03:24:39 -6.3 CT Up 51.1 239.9 Up 03:09:39 - 03:39:39 -322
Redmond 03:24:40 -6.4 CT Up 51.3 240.2 Up 03:09:40 - 03:39:40 -357
Sisters 03:24:38 -6.1 CT Up 51.5 239.7 Up 03:09:38 - 03:39:38 -359
Bend 03:24:39 -6.4 CT Up 51.5 240.3 Up 03:09:39 - 03:39:39 -380
Oregon Observatory 03:24:39 -6.4 CT Up 51.7 240.3 Up 03:09:39 - 03:39:39 -398
La Pine/Gilchrist 03:24:40 -6.4 CT Up 51.8 240.5 Up 03:09:40 - 03:39:40 -419
North Lake 03:24:44 -7.0 CT Up 51.6 241.7 Up 03:09:44 - 03:39:44 -455
Paisley 03:24:46 -7.4 CT Up 51.6 242.7 Up 03:09:46 - 03:39:46 -506
Niwot 03:26:00 -19.0 Dark Up 41.3 259.7 Up 03:11:00 - 03:41:00 -530
Chiloquin 03:24:41 -6.6 CT Up 52.6 241.3 Up 03:09:41 - 03:39:41 -533
Lakeview 03:24:48 -7.8 CT Up 51.7 243.5 Up 03:09:48 - 03:39:48 -554
Klamath Falls 03:24:42 -6.8 CT Up 52.7 241.8 Up 03:09:42 - 03:39:42 -567
Tulelake 03:24:44 -7.1 CT Up 52.6 242.5 Up 03:09:44 - 03:39:44 -590
Cedarville 03:24:51 -8.2 CT Up 51.9 244.5 Up 03:09:51 - 03:39:51 -618
Fall River/Burney 03:24:46 -7.5 CT Up 52.9 243.7 Up 03:09:46 - 03:39:46 -681
Susanville 03:24:51 -8.2 CT Up 52.7 245.2 Up 03:09:51 - 03:39:51 -736
Gimple 03:24:51 -8.2 CT Up 53.0 245.4 Up 03:09:51 - 03:39:51 -767
Greenville 03:24:51 -8.1 CT Up 53.0 245.3 Up 03:09:51 - 03:39:51 -767
Quincy 03:24:51 -8.2 CT Up 53.1 245.5 Up 03:09:51 - 03:39:51 -788
Portola 03:24:54 -8.6 CT Up 52.8 246.2 Up 03:09:54 - 03:39:54 -795
Reno 03:24:58 -9.2 CT Up 52.4 247.2 Up 03:09:58 - 03:39:58 -814
Carson City 03:24:59 -9.3 CT Up 52.6 247.6 Up 03:09:59 - 03:39:59 -850
Yerington 03:25:03 -9.9 CT Up 52.2 248.5 Up 03:10:03 - 03:40:03 -862
Gardnerville 03:25:00 -9.5 CT Up 52.6 248.0 Up 03:10:00 - 03:40:00 -874
Hawthorne 03:25:07 -10.4 CT Up 51.9 249.6 Up 03:10:07 - 03:40:07 -903
Tonopah 03:25:14 -11.7 CT Up 51.0 251.6 Up 03:10:14 - 03:40:14 -931
Lee Vining 03:25:05 -10.3 CT Up 52.5 249.8 Up 03:10:05 - 03:40:05 -967
Bishop 03:25:10 -11.1 CT Up 52.1 251.3 Up 03:10:10 - 03:40:10 -1019
Beatty 03:25:20 -12.5 AT Up 51.0 253.4 Up 03:10:20 - 03:40:20 -1044
Indian Springs 03:25:26 -13.4 AT Up 50.2 254.7 Up 03:10:26 - 03:40:26 -1062
Lone Pine 03:25:14 -11.6 CT Up 52.1 252.5 Up 03:10:14 - 03:40:14 -1093
Henderson 03:25:31 -14.2 AT Up 49.8 255.9 Up 03:10:31 - 03:40:31 -1106
Patrick 03:25:37 -15.3 AT Up 49.1 257.5 Up 03:10:37 - 03:40:37 -1153
Searchlight/Boulder City 03:25:32 -14.5 AT Up 49.9 256.6 Up 03:10:32 - 03:40:32 -1164
DCO 03:25:41 -16.0 AT Up 48.5 258.4 Up 03:10:41 - 03:40:41 -1173
Kingman/Dolan Springs 03:25:37 -15.2 AT Up 49.3 257.6 Up 03:10:37 - 03:40:37 -1179
Laughlin/Bullhead City 03:25:35 -14.9 AT Up 49.7 257.3 Up 03:10:35 - 03:40:35 -1190
Mohave Valley 03:25:35 -15.0 AT Up 49.7 257.6 Up 03:10:35 - 03:40:35 -1218
Lake Havasu City 03:25:37 -15.3 AT Up 49.6 258.2 Up 03:10:37 - 03:40:37 -1256
CPSLO 03:25:04 -10.1 CT Up 54.5 251.7 Up 03:10:04 - 03:40:04 -1262
Parker 03:25:38 -15.5 AT Up 49.7 258.7 Up 03:10:38 - 03:40:38 -1292
Blythe 03:25:38 -15.5 AT Up 50.0 259.1 Up 03:10:38 - 03:40:38 -1351
Wildwood 03:25:17 -12.2 AT Up 53.2 255.2 Up 03:10:17 - 03:40:17 -1361
Idyllwild 03:25:28 -13.8 AT Up 51.7 257.3 Up 03:10:28 - 03:40:28 -1372
Calipatria 03:25:35 -15.0 AT Up 50.9 258.9 Up 03:10:35 - 03:40:35 -1418
Yuma 03:25:40 -15.9 AT Up 50.2 260.1 Up 03:10:40 - 03:40:40 -1449

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 00SR331, (2018/04/18 03:21UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 16.60  35
Alhena         06:37:42.8 +16:23:57  1.9  2.95  44
PPM 123009     06:46:21.1 +18:50:16  6.5  0.36  46
PPM 122946     06:43:47.1 +18:39:21  8.1  0.29  45
PPM 122974     06:45:01.8 +18:42:44  9.4  0.11  46
00SR331        06:44:50.2 +18:48:33 14.8        46
Positions are for J2000

Event circumstances last updated at 2017/05/13 17:34:40 UT

Marc W. Buie, Southwest Research Institute

RECON