RECON: TNO occultation with 00SR331

Event between 00SR331 and star UC4-543-035088 with event index number of 92835

Geocentric closest approach at 2017/12/26 08:55:47 UTC

J2000 position of star is 06:49:52.4 +18:32:39
Equinox of date position of star is 06:50:53.4 +18:31:23
Stellar brightness R=16.1, use SENSEUP=128
Star is 97 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 32.3 AU from the Sun and 31.3 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 624 seconds.
The 1-sigma cross-track error in the shadow position is 2300 km.
The sky-plane scale is 22702.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=106.2 km assuming a 5% albedo -- 4.4 sec chord
Diameter=43.3 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 00SR331, (2017/12/26 08:56UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:24.9 +27:58:53  1.1 15.85 109
Alhena         06:38:45.0 +16:22:57  1.9  3.61  94
PPM 123009     06:47:24.4 +18:49:03  6.5  0.88  96
PPM 123122     06:51:17.3 +18:46:34  8.2  0.27  97
PPM 123103     06:50:45.2 +18:43:36  9.7  0.21  97
00SR331        06:50:55.6 +18:31:21 16.1        97
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 1.4 sigma about the mid-time.
The median site spacing is 23.9 km RECON observability=1.0 and success probability=19.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:55:37 -62.0 Dark Down 59.1 193.1 Up 08:40:37 - 09:10:37 640
Tonasket 08:55:36 -62.2 Dark Down 59.3 193.2 Up 08:40:36 - 09:10:36 618
Okanogan 08:55:37 -62.6 Dark Down 59.7 193.0 Up 08:40:37 - 09:10:37 584
Brewster 08:55:37 -62.9 Dark Down 60.0 192.8 Up 08:40:37 - 09:10:37 557
Manson/Chelan 08:55:38 -63.2 Dark Down 60.2 192.2 Up 08:40:38 - 09:10:38 534
Entiat 08:55:38 -63.4 Dark Down 60.4 192.1 Up 08:40:38 - 09:10:38 512
Wenatchee 08:55:38 -63.7 Dark Down 60.7 192.0 Up 08:40:38 - 09:10:38 487
Ellensburg 08:55:38 -64.1 Dark Down 61.1 191.7 Up 08:40:38 - 09:10:38 445
Yakima 08:55:38 -64.4 Dark Down 61.5 191.9 Up 08:40:38 - 09:10:38 405
Toppenish/White Swan 08:55:38 -64.6 Dark Down 61.7 192.3 Up 08:40:38 - 09:10:38 386
Pasco 08:55:34 -64.2 Dark Down 61.6 194.8 Up 08:40:34 - 09:10:34 385
PNWRO 08:55:32 -64.4 Dark Down 61.8 195.4 Up 08:40:32 - 09:10:32 363
George/Umatilla 08:55:34 -64.6 Dark Down 62.0 194.5 Up 08:40:34 - 09:10:34 350
Goldendale 08:55:39 -65.2 Dark Down 62.3 191.6 Up 08:40:39 - 09:10:39 329
The Dalles 08:55:39 -65.5 Dark Down 62.6 191.0 Up 08:40:39 - 09:10:39 303
Maupin 08:55:39 -65.9 Dark Down 63.0 191.4 Up 08:40:39 - 09:10:39 263
Madras/Culver 08:55:39 -66.3 Dark Down 63.5 191.5 Up 08:40:39 - 09:10:39 209
Redmond 08:55:39 -66.7 Dark Down 63.9 191.5 Up 08:40:39 - 09:10:39 174
Sisters 08:55:40 -66.8 Dark Down 63.9 190.7 Up 08:40:40 - 09:10:40 172
Bend 08:55:39 -66.9 Dark Down 64.1 191.3 Up 08:40:39 - 09:10:39 151
Oregon Observatory 08:55:39 -67.1 Dark Down 64.3 191.1 Up 08:40:39 - 09:10:39 133
La Pine/Gilchrist 08:55:39 -67.3 Dark Down 64.5 191.1 Up 08:40:39 - 09:10:39 112
North Lake 08:55:38 -67.5 Dark Down 64.9 192.5 Up 08:40:38 - 09:10:38 74
Paisley 08:55:36 -67.8 Dark Down 65.3 193.6 Up 08:40:36 - 09:10:36 22
Chiloquin 08:55:40 -68.4 Dark Down 65.7 190.7 Up 08:40:40 - 09:10:40 -5
Lakeview 08:55:35 -68.1 Dark Down 65.8 194.3 Up 08:40:35 - 09:10:35 -29
Klamath Falls 08:55:39 -68.7 Dark Down 66.0 191.0 Up 08:40:39 - 09:10:39 -37
Niwot 08:54:42 -60.8 Dark Down 61.8 226.3 Up 08:39:42 - 09:09:42 -52
Tulelake 08:55:38 -68.8 Dark Down 66.2 191.9 Up 08:40:38 - 09:10:38 -61
Cedarville 08:55:34 -68.6 Dark Down 66.4 195.1 Up 08:40:34 - 09:10:34 -94
Fall River/Burney 08:55:38 -69.5 Dark Down 67.1 192.5 Up 08:40:38 - 09:10:38 -153
Susanville 08:55:35 -69.7 Dark Down 67.6 194.6 Up 08:40:35 - 09:10:35 -211
Gimple 08:55:35 -70.0 Dark Down 67.9 194.3 Up 08:40:35 - 09:10:35 -241
Greenville 08:55:36 -70.0 Dark Down 67.9 194.0 Up 08:40:36 - 09:10:36 -242
Quincy 08:55:35 -70.2 Dark Down 68.1 194.2 Up 08:40:35 - 09:10:35 -262
Portola 08:55:34 -70.1 Dark Down 68.1 195.4 Up 08:40:34 - 09:10:34 -271
Reno 08:55:31 -70.0 Dark Down 68.2 197.2 Up 08:40:31 - 09:10:31 -292
Carson City 08:55:31 -70.2 Dark Down 68.6 197.5 Up 08:40:31 - 09:10:31 -329
Yerington 08:55:28 -70.1 Dark Down 68.6 199.3 Up 08:40:28 - 09:10:28 -343
Gardnerville 08:55:30 -70.4 Dark Down 68.8 197.8 Up 08:40:30 - 09:10:30 -353
Hawthorne 08:55:26 -70.1 Dark Down 68.9 201.0 Up 08:40:26 - 09:10:26 -385
Tonopah 08:55:21 -69.6 Dark Down 68.9 204.9 Up 08:40:21 - 09:10:21 -419
Lee Vining 08:55:27 -70.8 Dark Down 69.6 200.3 Up 08:40:27 - 09:10:27 -448
Bishop 08:55:24 -70.8 Dark Down 69.9 202.7 Up 08:40:24 - 09:10:24 -503
Beatty 08:55:18 -70.1 Dark Down 69.8 207.4 Up 08:40:18 - 09:10:18 -534
Indian Springs 08:55:14 -69.6 Dark Down 69.7 210.5 Up 08:40:14 - 09:10:14 -555
Lone Pine 08:55:23 -71.1 Dark Down 70.5 204.4 Up 08:40:23 - 09:10:23 -579
Henderson 08:55:11 -69.5 Dark Down 69.8 212.9 Up 08:40:11 - 09:10:11 -603
Patrick 08:55:06 -69.0 Dark Down 69.8 216.5 Up 08:40:06 - 09:10:06 -654
Searchlight/Boulder City 08:55:10 -69.7 Dark Down 70.3 213.9 Up 08:40:10 - 09:10:10 -662
DCO 08:55:03 -68.7 Dark Down 69.7 218.6 Up 08:40:03 - 09:10:03 -677
Kingman/Dolan Springs 08:55:07 -69.3 Dark Down 70.1 216.4 Up 08:40:07 - 09:10:07 -680
Laughlin/Bullhead City 08:55:09 -69.7 Dark Down 70.4 215.2 Up 08:40:09 - 09:10:09 -689
Mohave Valley 08:55:09 -69.8 Dark Down 70.6 215.7 Up 08:40:09 - 09:10:09 -717
CPSLO 08:55:32 -73.5 Dark Down 72.5 198.6 Up 08:40:32 - 09:10:32 -742
Lake Havasu City 08:55:07 -69.8 Dark Down 70.8 217.0 Up 08:40:07 - 09:10:07 -756
Parker 08:55:07 -70.0 Dark Down 71.1 217.6 Up 08:40:07 - 09:10:07 -793
Wildwood 08:55:23 -73.0 Dark Down 73.0 206.1 Up 08:40:23 - 09:10:23 -848
Blythe 08:55:07 -70.4 Dark Down 71.6 217.8 Up 08:40:07 - 09:10:07 -852
Idyllwild 08:55:16 -71.9 Dark Down 72.5 212.1 Up 08:40:16 - 09:10:16 -865
Calipatria 08:55:11 -71.3 Dark Down 72.5 216.4 Up 08:40:11 - 09:10:11 -916
Yuma 08:55:07 -70.8 Dark Down 72.4 219.5 Up 08:40:07 - 09:10:07 -950

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, (2017/12/26 08:56UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 15.85 109
Alhena         06:37:42.8 +16:23:57  1.9  3.61  94
PPM 123009     06:46:21.1 +18:50:16  6.5  0.88  96
PPM 123122     06:50:14.0 +18:47:53  8.2  0.27  97
PPM 123103     06:49:42.0 +18:44:54  9.7  0.21  97
00SR331        06:49:52.4 +18:32:39 16.1        97
Positions are for J2000

Event circumstances last updated at 2017/05/13 17:33:42 UT

Marc W. Buie, Southwest Research Institute

RECON