RECON: TNO occultation with 00SR331

Event between 00SR331 and star UC4-542-036443 with event index number of 168436

Geocentric closest approach at 2018/12/20 11:06:55 UTC

J2000 position of star is 07:00:26.2 +18:18:14
Equinox of date position of star is 07:01:29.6 +18:16:39
Stellar brightness R=16.4, use SENSEUP=128
Star is 46 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 32.5 AU from the Sun and 31.5 AU from the Earth.
The TNO is moving 23.0 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 505 seconds.
The 1-sigma cross-track error in the shadow position is 2402 km.
The sky-plane scale is 22864.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=106.2 km assuming a 5% albedo -- 4.6 sec chord
Diameter=43.3 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 00SR331, (2018/12/20 11:07UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.5 +27:58:44  1.1 14.16  56
Alhena         06:38:48.5 +16:22:53  1.9  5.75  41
PPM 123373     07:01:23.2 +15:30:26  6.4  2.77  46
PPM 123408     07:02:51.8 +17:56:49  7.8  0.45  47
PPM 123380     07:01:41.4 +18:08:04  9.7  0.15  46
00SR331        07:01:32.6 +18:16:34 16.4        47
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 1.8 sigma about the mid-time.
The median site spacing is 20.9 km RECON observability=1.0 and success probability=15.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:05:35 -44.9 Dark Up 50.6 230.0 Up 10:50:35 - 11:20:35 -652
Tonasket 11:05:34 -45.0 Dark Up 50.7 230.2 Up 10:50:34 - 11:20:34 -672
Okanogan 11:05:34 -45.2 Dark Up 51.0 230.3 Up 10:50:34 - 11:20:34 -705
Brewster 11:05:34 -45.4 Dark Up 51.3 230.3 Up 10:50:34 - 11:20:34 -732
Manson/Chelan 11:05:35 -45.7 Dark Up 51.6 230.1 Up 10:50:35 - 11:20:35 -757
Entiat 11:05:35 -45.8 Dark Up 51.8 230.2 Up 10:50:35 - 11:20:35 -778
Wenatchee 11:05:34 -45.9 Dark Up 52.0 230.3 Up 10:50:34 - 11:20:34 -803
Ellensburg 11:05:34 -46.2 Dark Up 52.4 230.4 Up 10:50:34 - 11:20:34 -844
Yakima 11:05:33 -46.3 Dark Up 52.6 230.8 Up 10:50:33 - 11:20:33 -881
Pasco 11:05:28 -45.5 Dark Up 52.1 233.0 Up 10:50:28 - 11:20:28 -888
Toppenish/White Swan 11:05:32 -46.3 Dark Up 52.7 231.3 Up 10:50:32 - 11:20:32 -898
PNWRO 11:05:27 -45.4 Dark Up 52.1 233.5 Up 10:50:27 - 11:20:27 -906
George/Umatilla 11:05:28 -45.7 Dark Up 52.4 233.1 Up 10:50:28 - 11:20:28 -922
Goldendale 11:05:32 -46.7 Dark Up 53.3 231.3 Up 10:50:32 - 11:20:32 -956
The Dalles 11:05:33 -47.0 Dark Up 53.6 231.0 Up 10:50:33 - 11:20:33 -983
Maupin 11:05:32 -47.1 Dark Up 53.8 231.6 Up 10:50:32 - 11:20:32 -1020
Madras/Culver 11:05:31 -47.2 Dark Up 54.2 232.2 Up 10:50:31 - 11:20:31 -1072
Redmond 11:05:30 -47.3 Dark Up 54.4 232.5 Up 10:50:30 - 11:20:30 -1106
Sisters 11:05:31 -47.6 Dark Up 54.6 231.9 Up 10:50:31 - 11:20:31 -1111
Bend 11:05:31 -47.5 Dark Up 54.6 232.5 Up 10:50:31 - 11:20:31 -1129
Oregon Observatory 11:05:31 -47.6 Dark Up 54.8 232.6 Up 10:50:31 - 11:20:31 -1147
La Pine/Gilchrist 11:05:30 -47.7 Dark Up 55.0 232.7 Up 10:50:30 - 11:20:30 -1168
Niwot 11:04:36 -36.1 Dark Up 45.8 253.9 Up 10:49:36 - 11:19:36 -1169
North Lake 11:05:27 -47.4 Dark Up 54.9 234.0 Up 10:50:27 - 11:20:27 -1198
Paisley 11:05:25 -47.3 Dark Up 55.0 235.1 Up 10:50:25 - 11:20:25 -1244
Chiloquin 11:05:29 -48.2 Dark Up 55.9 233.5 Up 10:50:29 - 11:20:29 -1280
Lakeview 11:05:24 -47.2 Dark Up 55.2 235.9 Up 10:50:24 - 11:20:24 -1289
Klamath Falls 11:05:28 -48.2 Dark Up 56.0 234.0 Up 10:50:28 - 11:20:28 -1311
Tulelake 11:05:27 -48.1 Dark Up 56.0 234.8 Up 10:50:27 - 11:20:27 -1332
Cedarville 11:05:22 -47.2 Dark Up 55.4 236.9 Up 10:50:22 - 11:20:22 -1349
Fall River/Burney 11:05:25 -48.2 Dark Up 56.5 236.0 Up 10:50:25 - 11:20:25 -1418
Susanville 11:05:21 -47.8 Dark Up 56.3 237.7 Up 10:50:21 - 11:20:21 -1465
Gimple 11:05:22 -48.0 Dark Up 56.6 237.8 Up 10:50:22 - 11:20:22 -1496
Greenville 11:05:22 -48.0 Dark Up 56.7 237.7 Up 10:50:22 - 11:20:22 -1497
Quincy 11:05:21 -48.1 Dark Up 56.8 237.9 Up 10:50:21 - 11:20:21 -1517
Portola 11:05:20 -47.7 Dark Up 56.5 238.7 Up 10:50:20 - 11:20:20 -1520
Reno 11:05:17 -47.3 Dark Up 56.3 239.8 Up 10:50:17 - 11:20:17 -1534
Carson City 11:05:16 -47.3 Dark Up 56.4 240.3 Up 10:50:16 - 11:20:16 -1569
Yerington 11:05:14 -46.8 Dark Up 56.1 241.3 Up 10:50:14 - 11:20:14 -1576
Gardnerville 11:05:16 -47.3 Dark Up 56.5 240.7 Up 10:50:16 - 11:20:16 -1592
Hawthorne 11:05:12 -46.5 Dark Up 56.0 242.5 Up 10:50:12 - 11:20:12 -1611
Tonopah 11:05:06 -45.4 Dark Up 55.2 244.7 Up 10:50:06 - 11:20:06 -1628
Lee Vining 11:05:12 -46.9 Dark Up 56.6 242.7 Up 10:50:12 - 11:20:12 -1676
Bishop 11:05:09 -46.4 Dark Up 56.3 244.3 Up 10:50:09 - 11:20:09 -1720
Beatty 11:05:03 -45.2 Dark Up 55.3 246.7 Up 10:50:03 - 11:20:03 -1733
Indian Springs 11:04:58 -44.3 Dark Up 54.7 248.2 Up 10:49:58 - 11:19:58 -1742
Henderson 11:04:55 -43.8 Dark Up 54.4 249.6 Up 10:49:55 - 11:19:55 -1780
Lone Pine 11:05:06 -46.2 Dark Up 56.4 245.7 Up 10:50:06 - 11:20:06 -1789
Patrick 11:04:51 -42.9 Dark Up 53.7 251.5 Up 10:49:51 - 11:19:51 -1818
DCO 11:04:48 -42.3 Dark Up 53.3 252.5 Up 10:49:48 - 11:19:48 -1832
Searchlight/Boulder City 11:04:54 -43.8 Dark Up 54.5 250.4 Up 10:49:54 - 11:19:54 -1836
Kingman/Dolan Springs 11:04:51 -43.1 Dark Up 53.9 251.6 Up 10:49:51 - 11:19:51 -1844
Laughlin/Bullhead City 11:04:53 -43.5 Dark Up 54.3 251.2 Up 10:49:53 - 11:19:53 -1858
Mohave Valley 11:04:52 -43.5 Dark Up 54.4 251.5 Up 10:49:52 - 11:19:52 -1885
Lake Havasu City 11:04:51 -43.3 Dark Up 54.4 252.3 Up 10:49:51 - 11:19:51 -1919
Parker 11:04:50 -43.2 Dark Up 54.4 252.8 Up 10:49:50 - 11:19:50 -1954
CPSLO 11:05:13 -48.4 Dark Up 58.8 244.7 Up 10:50:13 - 11:20:13 -1971
Blythe 11:04:50 -43.5 Dark Up 54.8 253.2 Up 10:49:50 - 11:19:50 -2013
Idyllwild 11:04:57 -45.2 Dark Up 56.5 251.1 Up 10:49:57 - 11:19:57 -2048
Wildwood 11:05:04 -46.8 Dark Up 57.8 248.7 Up 10:50:04 - 11:20:04 -2052
Calipatria 11:04:52 -44.2 Dark Up 55.7 253.0 Up 10:49:52 - 11:19:52 -2083
Yuma 11:04:48 -43.5 Dark Up 55.1 254.4 Up 10:49:48 - 11:19:48 -2107

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, (2018/12/20 11:07UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 14.16  56
Alhena         06:37:42.8 +16:23:57  1.9  5.75  41
PPM 123373     07:00:18.1 +15:32:06  6.4  2.77  46
PPM 123408     07:01:45.6 +17:58:31  7.8  0.45  47
PPM 123380     07:00:35.0 +18:09:44  9.7  0.15  46
00SR331        07:00:26.2 +18:18:14 16.4        46
Positions are for J2000

Event circumstances last updated at 2018/02/14 17:16:51 UT

Marc W. Buie, Southwest Research Institute

RECON