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 06:45:53.3 +18:47:23
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 03:24:33 -5.7 CT Up 47.9 237.5 Up 03:09:33 - 03:39:33 104
Tonasket 03:24:33 -5.8 CT Up 48.0 237.7 Up 03:09:33 - 03:39:33 83
Okanogan 03:24:34 -5.8 CT Up 48.3 237.9 Up 03:09:34 - 03:39:34 49
Brewster 03:24:34 -5.8 CT Up 48.5 237.9 Up 03:09:34 - 03:39:34 22
Manson/Chelan 03:24:33 -5.7 CT Up 48.8 237.7 Up 03:09:33 - 03:39:33 -2
Entiat 03:24:33 -5.7 CT Up 49.0 237.8 Up 03:09:33 - 03:39:33 -24
Wenatchee 03:24:34 -5.7 CT Up 49.2 237.9 Up 03:09:34 - 03:39:34 -49
Ellensburg 03:24:34 -5.8 CT Up 49.5 238.1 Up 03:09:34 - 03:39:34 -91
Yakima 03:24:35 -5.9 CT Up 49.8 238.5 Up 03:09:35 - 03:39:35 -130
Pasco 03:24:42 -7.0 CT Up 49.1 240.5 Up 03:09:42 - 03:39:42 -147
Toppenish/White Swan 03:24:36 -6.1 CT Up 49.8 238.9 Up 03:09:36 - 03:39:36 -149
PNWRO 03:24:44 -7.2 CT Up 49.0 241.0 Up 03:09:44 - 03:39:44 -168
George/Umatilla 03:24:42 -7.0 CT Up 49.4 240.6 Up 03:09:42 - 03:39:42 -182
Goldendale 03:24:36 -6.0 CT Up 50.3 239.0 Up 03:09:36 - 03:39:36 -207
The Dalles 03:24:35 -5.9 CT Up 50.6 238.8 Up 03:09:35 - 03:39:35 -233
Maupin 03:24:37 -6.1 CT Up 50.8 239.3 Up 03:09:37 - 03:39:37 -272
Madras/Culver 03:24:38 -6.3 CT Up 51.1 239.9 Up 03:09:38 - 03:39:38 -326
Redmond 03:24:38 -6.4 CT Up 51.3 240.2 Up 03:09:38 - 03:39:38 -362
Sisters 03:24:37 -6.1 CT Up 51.5 239.7 Up 03:09:37 - 03:39:37 -364
Bend 03:24:38 -6.4 CT Up 51.5 240.3 Up 03:09:38 - 03:39:38 -384
Oregon Observatory 03:24:38 -6.4 CT Up 51.7 240.3 Up 03:09:38 - 03:39:38 -403
La Pine/Gilchrist 03:24:38 -6.4 CT Up 51.8 240.5 Up 03:09:38 - 03:39:38 -424
North Lake 03:24:42 -7.0 CT Up 51.6 241.7 Up 03:09:42 - 03:39:42 -460
Paisley 03:24:45 -7.4 CT Up 51.6 242.7 Up 03:09:45 - 03:39:45 -511
Niwot 03:26:00 -19.0 Dark Up 41.3 259.7 Up 03:11:00 - 03:41:00 -538
Chiloquin 03:24:40 -6.6 CT Up 52.6 241.3 Up 03:09:40 - 03:39:40 -538
Lakeview 03:24:48 -7.8 CT Up 51.7 243.5 Up 03:09:48 - 03:39:48 -559
Klamath Falls 03:24:41 -6.8 CT Up 52.7 241.8 Up 03:09:41 - 03:39:41 -572
Tulelake 03:24:43 -7.1 CT Up 52.6 242.5 Up 03:09:43 - 03:39:43 -595
Cedarville 03:24:50 -8.1 CT Up 51.9 244.5 Up 03:09:50 - 03:39:50 -623
Fall River/Burney 03:24:46 -7.5 CT Up 52.9 243.7 Up 03:09:46 - 03:39:46 -686
Susanville 03:24:51 -8.2 CT Up 52.7 245.2 Up 03:09:51 - 03:39:51 -741
Gimple 03:24:51 -8.2 CT Up 53.0 245.3 Up 03:09:51 - 03:39:51 -772
Greenville 03:24:50 -8.1 CT Up 53.0 245.3 Up 03:09:50 - 03:39:50 -772
Quincy 03:24:51 -8.2 CT Up 53.1 245.5 Up 03:09:51 - 03:39:51 -793
Portola 03:24:53 -8.6 CT Up 52.8 246.2 Up 03:09:53 - 03:39:53 -800
Reno 03:24:57 -9.2 CT Up 52.4 247.2 Up 03:09:57 - 03:39:57 -819
Carson City 03:24:58 -9.3 CT Up 52.6 247.6 Up 03:09:58 - 03:39:58 -856
Yerington 03:25:02 -9.9 CT Up 52.2 248.5 Up 03:10:02 - 03:40:02 -867
Gardnerville 03:24:59 -9.5 CT Up 52.6 248.0 Up 03:09:59 - 03:39:59 -880
Hawthorne 03:25:05 -10.4 CT Up 51.9 249.6 Up 03:10:05 - 03:40:05 -908
Tonopah 03:25:14 -11.7 CT Up 51.0 251.6 Up 03:10:14 - 03:40:14 -937
Lee Vining 03:25:04 -10.3 CT Up 52.5 249.8 Up 03:10:04 - 03:40:04 -972
Bishop 03:25:10 -11.1 CT Up 52.1 251.3 Up 03:10:10 - 03:40:10 -1024
Beatty 03:25:19 -12.5 AT Up 51.0 253.3 Up 03:10:19 - 03:40:19 -1049
Indian Springs 03:25:25 -13.4 AT Up 50.2 254.7 Up 03:10:25 - 03:40:25 -1067
Lone Pine 03:25:13 -11.6 CT Up 52.1 252.5 Up 03:10:13 - 03:40:13 -1098
Henderson 03:25:29 -14.2 AT Up 49.8 255.9 Up 03:10:29 - 03:40:29 -1112
Patrick 03:25:36 -15.3 AT Up 49.1 257.5 Up 03:10:36 - 03:40:36 -1159
Searchlight/Boulder City 03:25:31 -14.5 AT Up 49.9 256.6 Up 03:10:31 - 03:40:31 -1170
DCO 03:25:41 -16.0 AT Up 48.5 258.4 Up 03:10:41 - 03:40:41 -1180
Kingman/Dolan Springs 03:25:36 -15.2 AT Up 49.3 257.6 Up 03:10:36 - 03:40:36 -1185
Laughlin/Bullhead City 03:25:34 -14.9 AT Up 49.7 257.3 Up 03:10:34 - 03:40:34 -1196
Mohave Valley 03:25:35 -15.0 AT Up 49.7 257.6 Up 03:10:35 - 03:40:35 -1224
Lake Havasu City 03:25:37 -15.3 AT Up 49.6 258.2 Up 03:10:37 - 03:40:37 -1262
CPSLO 03:25:03 -10.1 CT Up 54.5 251.7 Up 03:10:03 - 03:40:03 -1267
Parker 03:25:38 -15.5 AT Up 49.7 258.7 Up 03:10:38 - 03:40:38 -1298
Blythe 03:25:38 -15.5 AT Up 50.0 259.0 Up 03:10:38 - 03:40:38 -1357
Wildwood 03:25:16 -12.2 AT Up 53.2 255.2 Up 03:10:16 - 03:40:16 -1367
Idyllwild 03:25:27 -13.8 AT Up 51.7 257.3 Up 03:10:27 - 03:40:27 -1378
Calipatria 03:25:34 -15.0 AT Up 50.9 258.9 Up 03:10:34 - 03:40:34 -1423
Yuma 03:25:39 -15.9 AT Up 50.2 260.1 Up 03:10:39 - 03:40:39 -1455

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 2017/12/02 17:26:58 UT

Marc W. Buie, Southwest Research Institute

RECON