RECON: TNO occultation with 12UL177

Event between 12UL177 and star GA1200:00413671 with event index number of 212279

Geocentric closest approach at 2019/09/24 04:30:33 UTC

J2000 position of star is 02:31:42.8 +30:33:05
Equinox of date position of star is 02:32:49.5 +30:38:01
Stellar brightness G=14.6, use SENSEUP=128
Star is 72 degrees from the moon. Moon is 28% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 36.1 AU from the Sun and 35.4 AU from the Earth.
The TNO is moving 16.8 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 421 seconds.
The 1-sigma cross-track error in the shadow position is 1663 km.
The sky-plane scale is 25669.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=193.2 km assuming a 5% albedo -- 11.5 sec chord
Diameter=78.9 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12UL177, (2019/09/24 04:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.3 +16:32:51  0.8 31.59  48
Hamal          02:08:17.4 +23:33:17  2.0  8.95  79
13 Tri         02:29:58.3 +30:01:10  6.5  0.88  73
PPM 091778     02:34:18.1 +30:03:02  8.1  0.66  72
PPM 067386     02:30:31.8 +30:57:09  8.6  0.60  73
PPM 067430     02:33:03.1 +30:32:03 10.7  0.11  72
12UL177        02:32:53.1 +30:38:16 14.6        72
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 2.1 sigma about the mid-time.
The median site spacing is 16.8 km RECON observability=1.0 and success probability=4.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 04:34:19 -25.4 Dark Down 25.3 71.9 Low 04:19:19 - 04:49:19 4966
Penticton 04:34:21 -25.5 Dark Down 25.1 71.6 Low 04:19:21 - 04:49:21 4951
Okanagan Falls 04:34:22 -25.6 Dark Down 25.0 71.5 Low 04:19:22 - 04:49:22 4941
Southern Okanagan 04:34:23 -25.7 Dark Down 25.0 71.4 Low 04:19:23 - 04:49:23 4931
Oroville 04:34:24 -25.9 Dark Down 25.0 71.4 Low 04:19:24 - 04:49:24 4912
Tonasket 04:34:25 -26.0 Dark Down 24.9 71.3 Low 04:19:25 - 04:49:25 4898
Okanogan 04:34:27 -26.1 Dark Down 24.7 71.1 Low 04:19:27 - 04:49:27 4883
Manson/Chelan 04:34:30 -26.1 Dark Down 24.2 70.5 Low 04:19:30 - 04:49:30 4876
Brewster 04:34:28 -26.1 Dark Down 24.5 70.8 Low 04:19:28 - 04:49:28 4875
Entiat 04:34:31 -26.1 Dark Down 24.1 70.4 Low 04:19:31 - 04:49:31 4866
Wenatchee 04:34:32 -26.2 Dark Down 23.9 70.2 Low 04:19:32 - 04:49:32 4854
Ellensburg 04:34:34 -26.3 Dark Down 23.7 69.9 Low 04:19:34 - 04:49:34 4838
Yakima 04:34:36 -26.5 Dark Down 23.5 69.7 Low 04:19:36 - 04:49:36 4813
Toppenish/White Swan 04:34:37 -26.7 Dark Down 23.6 69.7 Low 04:19:37 - 04:49:37 4793
The Dalles 04:34:41 -26.7 Dark Down 22.8 69.0 Low 04:19:41 - 04:49:41 4777
Goldendale 04:34:41 -26.8 Dark Down 23.1 69.3 Low 04:19:41 - 04:49:41 4776
Maupin 04:34:44 -26.9 Dark Down 22.7 68.9 Low 04:19:44 - 04:49:44 4746
Pasco 04:34:38 -27.5 Dark Down 24.3 70.5 Low 04:19:38 - 04:49:38 4736
George/Umatilla 04:34:40 -27.6 Dark Down 24.1 70.2 Low 04:19:40 - 04:49:40 4723
Madras/Culver 04:34:46 -27.2 Dark Down 22.5 68.6 Low 04:19:46 - 04:49:46 4713
PNWRO 04:34:38 -27.8 Dark Down 24.4 70.5 Low 04:19:38 - 04:49:38 4711
Sisters 04:34:48 -27.1 Dark Down 22.1 68.2 Low 04:19:48 - 04:49:48 4710
Redmond 04:34:48 -27.3 Dark Down 22.3 68.5 Low 04:19:48 - 04:49:48 4692
Bend 04:34:49 -27.4 Dark Down 22.2 68.3 Low 04:19:49 - 04:49:49 4685
Oregon Observatory 04:34:50 -27.4 Dark Down 22.0 68.2 Low 04:19:50 - 04:49:50 4679
La Pine/Gilchrist 04:34:51 -27.4 Dark Down 21.9 68.1 Low 04:19:51 - 04:49:51 4668
North Lake 04:34:53 -28.0 Dark Down 22.1 68.2 Low 04:19:53 - 04:49:53 4615
Chiloquin 04:34:56 -27.8 Dark Down 21.2 67.5 Low 04:19:56 - 04:49:56 4611
Klamath Falls 04:34:58 -28.0 Dark Down 21.2 67.4 Low 04:19:58 - 04:49:58 4585
Paisley 04:34:56 -28.5 Dark Down 22.2 68.2 Low 04:19:56 - 04:49:56 4564
Tulelake 04:35:00 -28.3 Dark Down 21.3 67.5 Low 04:20:00 - 04:50:00 4554
Lakeview 04:34:58 -28.9 Dark Down 22.1 68.2 Low 04:19:58 - 04:49:58 4522
Fall River/Burney 04:35:03 -28.8 Dark Down 21.0 67.2 Low 04:20:03 - 04:50:03 4489
Cedarville 04:35:02 -29.4 Dark Down 22.0 68.0 Low 04:20:02 - 04:50:02 4470
Susanville 04:35:06 -29.6 Dark Down 21.3 67.4 Low 04:20:06 - 04:50:06 4414
Greenville 04:35:08 -29.5 Dark Down 21.0 67.1 Low 04:20:08 - 04:50:08 4408
Gimple 04:35:08 -29.6 Dark Down 21.0 67.2 Low 04:20:08 - 04:50:08 4404
Quincy 04:35:09 -29.6 Dark Down 20.9 67.1 Low 04:20:09 - 04:50:09 4394
Portola 04:35:09 -30.0 Dark Down 21.2 67.3 Low 04:20:09 - 04:50:09 4364
Reno 04:35:10 -30.6 Dark Down 21.6 67.5 Low 04:20:10 - 04:50:10 4317
Carson City 04:35:12 -30.8 Dark Down 21.4 67.4 Low 04:20:12 - 04:50:12 4291
Gardnerville 04:35:13 -30.9 Dark Down 21.4 67.3 Low 04:20:13 - 04:50:13 4271
Yerington 04:35:13 -31.3 Dark Down 21.8 67.6 Low 04:20:13 - 04:50:13 4249
Hawthorne 04:35:15 -31.9 Dark Down 22.0 67.7 Low 04:20:15 - 04:50:15 4192
Lee Vining 04:35:18 -31.8 Dark Down 21.5 67.3 Low 04:20:18 - 04:50:18 4173
Bishop 04:35:20 -32.6 Dark Down 21.8 67.4 Low 04:20:20 - 04:50:20 4096
Tonopah 04:35:16 -33.1 Dark Down 22.9 68.3 Low 04:20:16 - 04:50:16 4094
CPSLO 04:35:30 -32.0 Dark Down 19.3 65.7 Really Low 04:20:30 - 04:50:30 4047
Lone Pine 04:35:23 -33.3 Dark Down 21.7 67.3 Low 04:20:23 - 04:50:23 4024
Beatty 04:35:21 -34.0 Dark Down 22.8 68.1 Low 04:20:21 - 04:50:21 3987
Indian Springs 04:35:23 -34.9 Dark Down 23.5 68.4 Low 04:20:23 - 04:50:23 3913
Wildwood 04:35:34 -34.1 Dark Down 20.4 66.2 Low 04:20:34 - 04:50:34 3859
Henderson 04:35:24 -35.7 Dark Down 23.8 68.5 Low 04:20:24 - 04:50:24 3839
Searchlight/Boulder City 04:35:27 -36.0 Dark Down 23.7 68.3 Low 04:20:27 - 04:50:27 3792
Laughlin/Bullhead City 04:35:28 -36.4 Dark Down 23.8 68.4 Low 04:20:28 - 04:50:28 3753
Idyllwild 04:35:35 -35.6 Dark Down 21.7 66.9 Low 04:20:35 - 04:50:35 3741
Patrick 04:35:26 -36.8 Dark Down 24.5 68.8 Low 04:20:26 - 04:50:26 3739
Mohave Valley 04:35:28 -36.6 Dark Down 23.7 68.3 Low 04:20:28 - 04:50:28 3731
Kingman/Dolan Springs 04:35:27 -36.8 Dark Down 24.2 68.6 Low 04:20:27 - 04:50:27 3730
Niwot 04:34:57 -39.4 Dark Down 32.4 75.3 Up 04:19:57 - 04:49:57 3717
Lake Havasu City 04:35:30 -37.0 Dark Down 23.8 68.2 Low 04:20:30 - 04:50:30 3688
DCO 04:35:27 -37.5 Dark Down 24.9 69.0 Low 04:20:27 - 04:50:27 3681
Parker 04:35:31 -37.2 Dark Down 23.7 68.1 Low 04:20:31 - 04:50:31 3659
Calipatria 04:35:37 -36.8 Dark Down 22.4 67.2 Low 04:20:37 - 04:50:37 3637
Blythe 04:35:34 -37.2 Dark Down 23.3 67.8 Low 04:20:34 - 04:50:34 3631
Yuma 04:35:38 -37.7 Dark Down 22.9 67.4 Low 04:20:38 - 04:50:38 3559

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 12UL177, (2019/09/24 04:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 31.59  48
Hamal          02:07:10.7 +23:27:42  2.0  8.95  79
13 Tri         02:28:48.4 +29:55:55  6.5  0.88  73
PPM 091778     02:33:08.0 +29:57:52  8.1  0.66  72
PPM 067386     02:29:21.5 +30:51:55  8.6  0.60  73
PPM 067430     02:31:52.8 +30:26:52 10.7  0.11  72
12UL177        02:31:42.8 +30:33:05 14.6        72
Positions are for J2000

Event circumstances last updated at 2018/09/26 17:33:18 UT

Marc W. Buie, Southwest Research Institute

RECON