RECON: TNO occultation with 12UL177

Event between 12UL177 and star GA1200:00413671 with event index number of 357127

Geocentric closest approach at 2019/09/24 04:05:23 UTC

J2000 position of star is 02:31:42.8 +30:33:05
Equinox of date position of star is 02:32:52.0 +30:38:12
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 247 seconds.
The 1-sigma cross-track error in the shadow position is 1656 km.
The sky-plane scale is 25669.7 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 04:05UT)
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  72
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 3.6 sigma about the mid-time.
The median site spacing is 9.6 km RECON observability=0.3 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 04:09:12 -21.9 Dark Down 21.5 67.6 Low 03:54:12 - 04:24:12 9217
Summerland 04:09:13 -21.9 Dark Down 21.2 67.4 Low 03:54:13 - 04:24:13 9212
Penticton 04:09:14 -22.0 Dark Down 21.3 67.4 Low 03:54:14 - 04:24:14 9204
Okanagan Falls 04:09:15 -22.0 Dark Down 21.2 67.3 Low 03:54:15 - 04:24:15 9195
Oliver 04:09:15 -22.1 Dark Down 21.1 67.3 Low 03:54:15 - 04:24:15 9185
Anarchist Mountain Observatory 04:09:17 -22.3 Dark Down 21.2 67.4 Low 03:54:17 - 04:24:17 9168
Oroville 04:09:17 -22.3 Dark Down 21.1 67.3 Low 03:54:17 - 04:24:17 9167
Tonasket 04:09:18 -22.4 Dark Down 21.0 67.2 Low 03:54:18 - 04:24:18 9154
Okanogan 04:09:20 -22.5 Dark Down 20.8 67.0 Low 03:54:20 - 04:24:20 9141
Manson/Chelan 04:09:22 -22.4 Dark Down 20.3 66.5 Low 03:54:22 - 04:24:22 9136
Brewster 04:09:21 -22.5 Dark Down 20.6 66.8 Low 03:54:21 - 04:24:21 9134
Entiat 04:09:23 -22.4 Dark Down 20.1 66.3 Low 03:54:23 - 04:24:23 9127
Wenatchee 04:09:24 -22.5 Dark Down 20.0 66.2 Really Low 03:54:24 - 04:24:24 9116
Ellensburg 04:09:27 -22.5 Dark Down 19.7 65.9 Really Low 03:54:27 - 04:24:27 9101
Yakima 04:09:28 -22.7 Dark Down 19.5 65.8 Really Low 03:54:28 - 04:24:28 9079
Toppenish/White Swan 04:09:29 -22.9 Dark Down 19.5 65.8 Really Low 03:54:29 - 04:24:29 9060
The Dalles 04:09:33 -22.8 Dark Down 18.7 65.1 Really Low 03:54:33 - 04:24:33 9046
Goldendale 04:09:32 -22.9 Dark Down 19.0 65.4 Really Low 03:54:32 - 04:24:32 9045
Maupin 04:09:35 -23.0 Dark Down 18.6 65.0 Really Low 03:54:35 - 04:24:35 9018
Pasco 04:09:31 -23.8 Dark Down 20.3 66.6 Low 03:54:31 - 04:24:31 9004
George/Umatilla 04:09:32 -23.8 Dark Down 20.0 66.3 Low 03:54:32 - 04:24:32 8993
Madras/Culver 04:09:38 -23.2 Dark Down 18.4 64.9 Really Low 03:54:38 - 04:24:38 8987
Sisters 04:09:39 -23.1 Dark Down 17.9 64.5 Really Low 03:54:39 - 04:24:39 8985
PNWRO 04:09:32 -24.0 Dark Down 20.3 66.6 Low 03:54:32 - 04:24:32 8980
Redmond 04:09:40 -23.3 Dark Down 18.2 64.7 Really Low 03:54:40 - 04:24:40 8968
Bend 04:09:42 -23.3 Dark Down 18.0 64.6 Really Low 03:54:42 - 04:24:42 8961
Oregon Observatory 04:09:41 -23.3 Dark Down 17.8 64.5 Really Low 03:54:41 - 04:24:41 8956
La Pine/Gilchrist 04:09:43 -23.4 Dark Down 17.7 64.4 Really Low 03:54:43 - 04:24:43 8946
North Lake 04:09:45 -23.9 Dark Down 17.9 64.6 Really Low 03:54:45 - 04:24:45 8895
Chiloquin 04:09:47 -23.6 Dark Down 17.0 63.9 Really Low 03:54:47 - 04:24:47 8893
Klamath Falls 04:09:49 -23.8 Dark Down 16.9 63.8 Really Low 03:54:49 - 04:24:49 8868
Paisley 04:09:48 -24.4 Dark Down 17.9 64.7 Really Low 03:54:48 - 04:24:48 8846
Tulelake 04:09:52 -24.1 Dark Down 17.0 63.9 Really Low 03:54:52 - 04:24:52 8839
Lakeview 04:09:50 -24.8 Dark Down 17.9 64.6 Really Low 03:54:50 - 04:24:50 8807
Fall River/Burney 04:09:55 -24.5 Dark Down 16.7 63.7 Really Low 03:54:55 - 04:24:55 8778
Cedarville 04:09:53 -25.2 Dark Down 17.7 64.5 Really Low 03:54:53 - 04:24:53 8758
Susanville 04:09:59 -25.3 Dark Down 16.9 64.0 Really Low 03:54:59 - 04:24:59 8706
Greenville 04:10:01 -25.2 Dark Down 16.6 63.7 Really Low 03:55:01 - 04:25:01 8701
Gimple 04:10:01 -25.3 Dark Down 16.7 63.8 Really Low 03:55:01 - 04:25:01 8697
Quincy 04:10:01 -25.3 Dark Down 16.5 63.7 Really Low 03:55:01 - 04:25:01 8687
Portola 04:10:02 -25.7 Dark Down 16.8 63.9 Really Low 03:55:02 - 04:25:02 8659
Reno 04:10:02 -26.2 Dark Down 17.1 64.2 Really Low 03:55:02 - 04:25:02 8613
Carson City 04:10:04 -26.4 Dark Down 17.0 64.1 Really Low 03:55:04 - 04:25:04 8588
Gardnerville 04:10:07 -26.5 Dark Down 16.9 64.1 Really Low 03:55:07 - 04:25:07 8570
Yerington 04:10:06 -26.9 Dark Down 17.4 64.4 Really Low 03:55:06 - 04:25:06 8547
Hawthorne 04:10:08 -27.5 Dark Down 17.5 64.5 Really Low 03:55:08 - 04:25:08 8492
Lee Vining 04:10:10 -27.4 Dark Down 16.9 64.1 Really Low 03:55:10 - 04:25:10 8475
Bishop 04:10:13 -28.2 Dark Down 17.2 64.3 Really Low 03:55:13 - 04:25:13 8401
Tonopah 04:10:11 -28.7 Dark Down 18.3 65.1 Really Low 03:55:11 - 04:25:11 8397
CPSLO 04:10:21 -27.3 Dark Down 14.7 62.7 Really Low 03:55:21 - 04:25:21 8359
Lone Pine 04:10:16 -28.7 Dark Down 17.1 64.3 Really Low 03:55:16 - 04:25:16 8332
Beatty 04:10:16 -29.5 Dark Down 18.2 65.0 Really Low 03:55:16 - 04:25:16 8295
Indian Springs 04:10:18 -30.5 Dark Down 18.9 65.5 Really Low 03:55:18 - 04:25:18 8222
Wildwood 04:10:28 -29.3 Dark Down 15.7 63.4 Really Low 03:55:28 - 04:25:28 8176
Henderson 04:10:20 -31.2 Dark Down 19.2 65.6 Really Low 03:55:20 - 04:25:20 8151
Searchlight/Boulder City 04:10:23 -31.5 Dark Down 19.0 65.5 Really Low 03:55:23 - 04:25:23 8106
Laughlin/Bullhead City 04:10:24 -31.9 Dark Down 19.1 65.5 Really Low 03:55:24 - 04:25:24 8068
Idyllwild 04:10:29 -30.9 Dark Down 16.9 64.2 Really Low 03:55:29 - 04:25:29 8061
Patrick 04:10:23 -32.3 Dark Down 19.7 65.9 Really Low 03:55:23 - 04:25:23 8053
Mohave Valley 04:10:25 -32.0 Dark Down 19.0 65.5 Really Low 03:55:25 - 04:25:25 8047
Kingman/Dolan Springs 04:10:24 -32.3 Dark Down 19.5 65.8 Really Low 03:55:24 - 04:25:24 8045
Niwot 04:09:57 -35.7 Dark Down 27.8 72.1 Low 03:54:57 - 04:24:57 8012
SwRI 04:09:58 -35.7 Dark Down 27.6 72.0 Low 03:54:58 - 04:24:58 8008
Lake Havasu City 04:10:27 -32.4 Dark Down 19.0 65.5 Really Low 03:55:27 - 04:25:27 8005
DCO 04:10:24 -33.0 Dark Down 20.1 66.2 Low 03:55:24 - 04:25:24 7997
Parker 04:10:28 -32.6 Dark Down 18.9 65.4 Really Low 03:55:28 - 04:25:28 7977
Calipatria 04:10:32 -32.1 Dark Down 17.6 64.5 Really Low 03:55:32 - 04:25:32 7958
Blythe 04:10:30 -32.6 Dark Down 18.5 65.1 Really Low 03:55:30 - 04:25:30 7951
Yuma 04:10:33 -32.9 Dark Down 18.1 64.8 Really Low 03:55:33 - 04:25:33 7882

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 04:05UT)
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 +29:55:56  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  72
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 2019/06/07 22:41:06 UT

Marc W. Buie, Southwest Research Institute

RECON