RECON: TNO occultation with 118228

Event between (118228) 96TQ66 and star UC4-614-011190 with event index number of 99420

Geocentric closest approach at 2018/01/11 04:09:59 UTC

J2000 position of star is 03:54:44.1 +32:46:13
Equinox of date position of star is 03:55:50.1 +32:49:13
Stellar brightness R=15.9, use SENSEUP=128
Star is 156 degrees from the moon. Moon is 29% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 35.3 AU from the Sun and 34.6 AU from the Earth.
The TNO is moving 15.9 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 426 seconds.
The 1-sigma cross-track error in the shadow position is 5481 km.
The sky-plane scale is 25120.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 15.8 sec chord
Diameter=102.6 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 118228, (2018/01/11 04:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.4 +16:32:39  0.8 18.74 157
44Zet Per      03:55:16.2 +31:56:09  2.8  0.90 157
42 Per         03:50:41.3 +33:08:43  5.2  1.14 156
PPM 068938     03:58:28.2 +32:56:21  8.5  0.56 155
PPM 068895     03:55:28.0 +32:59:45  9.1  0.19 156
118228         03:55:52.8 +32:49:20 15.9       156
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 21.8 km RECON observability=1.0 and success probability=6.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:09:35 -36.5 Dark Down 73.4 164.8 Up 03:54:35 - 04:24:35 6796
Tonasket 04:09:36 -36.5 Dark Down 73.6 164.7 Up 03:54:36 - 04:24:36 6774
Okanogan 04:09:38 -36.5 Dark Down 73.9 163.9 Up 03:54:38 - 04:24:38 6748
Brewster 04:09:40 -36.4 Dark Down 74.1 163.1 Up 03:54:40 - 04:24:40 6729
Manson/Chelan 04:09:42 -36.2 Dark Down 74.3 161.8 Up 03:54:42 - 04:24:42 6723
Entiat 04:09:42 -36.1 Dark Down 74.5 161.3 Up 03:54:42 - 04:24:42 6705
Wenatchee 04:09:43 -36.1 Dark Down 74.7 160.7 Up 03:54:43 - 04:24:43 6685
Ellensburg 04:09:47 -36.0 Dark Down 75.0 159.6 Up 03:54:47 - 04:24:47 6655
Yakima 04:09:48 -36.0 Dark Down 75.4 159.0 Up 03:54:48 - 04:24:48 6617
Toppenish/White Swan 04:09:48 -36.2 Dark Down 75.6 159.2 Up 03:54:48 - 04:24:48 6591
Goldendale 04:09:51 -35.9 Dark Down 76.0 157.1 Up 03:54:51 - 04:24:51 6555
The Dalles 04:09:54 -35.7 Dark Down 76.2 155.5 Up 03:54:54 - 04:24:54 6548
Pasco 04:09:43 -37.1 Dark Down 76.0 163.2 Up 03:54:43 - 04:24:43 6533
George/Umatilla 04:09:45 -36.9 Dark Down 76.3 162.1 Up 03:54:45 - 04:24:45 6509
Maupin 04:09:55 -35.8 Dark Down 76.6 155.2 Up 03:54:55 - 04:24:55 6505
PNWRO 04:09:43 -37.2 Dark Down 76.3 163.7 Up 03:54:43 - 04:24:43 6501
Madras/Culver 04:09:57 -35.8 Dark Down 77.1 154.1 Up 03:54:57 - 04:24:57 6455
Sisters 04:10:01 -35.6 Dark Down 77.2 151.9 Up 03:55:01 - 04:25:01 6441
Redmond 04:09:59 -35.8 Dark Down 77.4 153.2 Up 03:54:59 - 04:24:59 6423
Bend 04:10:00 -35.8 Dark Down 77.5 152.3 Up 03:55:00 - 04:25:00 6409
Oregon Observatory 04:10:01 -35.7 Dark Down 77.6 151.5 Up 03:55:01 - 04:25:01 6398
La Pine/Gilchrist 04:10:02 -35.6 Dark Down 77.8 150.8 Up 03:55:02 - 04:25:02 6381
North Lake 04:10:01 -36.1 Dark Down 78.4 152.0 Up 03:55:01 - 04:25:01 6316
Chiloquin 04:10:08 -35.5 Dark Down 78.6 146.8 Up 03:55:08 - 04:25:08 6290
Klamath Falls 04:10:08 -35.5 Dark Down 78.9 146.2 Up 03:55:08 - 04:25:08 6255
Paisley 04:10:01 -36.4 Dark Down 79.0 152.2 Up 03:55:01 - 04:25:01 6249
Tulelake 04:10:08 -35.8 Dark Down 79.3 146.6 Up 03:55:08 - 04:25:08 6217
Lakeview 04:10:02 -36.6 Dark Down 79.5 151.7 Up 03:55:02 - 04:25:02 6194
Fall River/Burney 04:10:11 -35.9 Dark Down 80.1 144.1 Up 03:55:11 - 04:25:11 6127
Cedarville 04:10:04 -36.7 Dark Down 80.1 150.7 Up 03:55:04 - 04:25:04 6124
Susanville 04:10:10 -36.4 Dark Down 80.9 145.2 Up 03:55:10 - 04:25:10 6037
Greenville 04:10:12 -36.2 Dark Down 81.0 142.9 Up 03:55:12 - 04:25:12 6022
Gimple 04:10:12 -36.3 Dark Down 81.0 143.2 Up 03:55:12 - 04:25:12 6019
Quincy 04:10:13 -36.2 Dark Down 81.2 142.1 Up 03:55:13 - 04:25:13 6003
Portola 04:10:11 -36.6 Dark Down 81.5 143.8 Up 03:55:11 - 04:25:11 5971
Reno 04:10:09 -37.1 Dark Down 82.0 145.9 Up 03:55:09 - 04:25:09 5919
Carson City 04:10:09 -37.1 Dark Down 82.3 144.6 Up 03:55:09 - 04:25:09 5883
Gardnerville 04:10:11 -37.2 Dark Down 82.5 143.8 Up 03:55:11 - 04:25:11 5858
Yerington 04:10:07 -37.6 Dark Down 82.7 147.2 Up 03:55:07 - 04:25:07 5838
Hawthorne 04:10:06 -38.0 Dark Down 83.3 148.3 Up 03:55:06 - 04:25:06 5771
Lee Vining 04:10:11 -37.7 Dark Down 83.6 142.6 Up 03:55:11 - 04:25:11 5737
Tonopah 04:10:01 -39.1 Dark Down 84.3 156.1 Up 03:55:01 - 04:25:01 5669
Bishop 04:10:08 -38.2 Dark Down 84.4 143.9 Up 03:55:08 - 04:25:08 5648
Lone Pine 04:10:10 -38.5 Dark Down 85.2 141.5 Up 03:55:10 - 04:25:10 5560
CPSLO 04:10:26 -36.4 Dark Down 84.3 114.9 Up 03:55:26 - 04:25:26 5544
Beatty 04:10:04 -39.5 Dark Down 85.5 154.8 Up 03:55:04 - 04:25:04 5536
Indian Springs 04:09:58 -40.4 Dark Down 86.1 164.6 Up 03:54:58 - 04:24:58 5461
Niwot 04:08:56 -48.0 Dark Down 79.7 227.4 Up 03:53:56 - 04:23:56 5454
Henderson 04:09:57 -40.9 Dark Down 86.7 171.9 Up 03:54:57 - 04:24:57 5380
Wildwood 04:10:20 -38.0 Dark Down 86.4 110.1 Up 03:55:20 - 04:25:20 5337
Searchlight/Boulder City 04:09:57 -41.0 Dark Down 87.3 171.3 Up 03:54:57 - 04:24:57 5321
Laughlin/Bullhead City 04:09:56 -41.3 Dark Down 87.6 177.1 Up 03:54:56 - 04:24:56 5277
Patrick 04:09:52 -41.8 Dark Down 87.3 189.9 Up 03:54:52 - 04:24:52 5274
Kingman/Dolan Springs 04:09:53 -41.7 Dark Down 87.6 187.2 Up 03:54:53 - 04:24:53 5259
Mohave Valley 04:09:58 -41.3 Dark Down 87.9 177.0 Up 03:54:58 - 04:24:58 5250
Idyllwild 04:10:12 -39.6 Dark Down 87.9 116.8 Up 03:55:12 - 04:25:12 5221
DCO 04:09:49 -42.4 Dark Down 87.4 204.2 Up 03:54:49 - 04:24:49 5216
Lake Havasu City 04:09:57 -41.5 Dark Down 88.3 183.1 Up 03:54:57 - 04:24:57 5200
Parker 04:09:58 -41.5 Dark Down 88.6 185.2 Up 03:54:58 - 04:24:58 5163
Blythe 04:10:02 -41.3 Dark Down 89.1 172.3 Up 03:55:02 - 04:25:02 5123
Calipatria 04:10:07 -40.5 Dark Down 89.0 111.6 Up 03:55:07 - 04:25:07 5112
Yuma 04:10:05 -41.3 Dark Down 89.8 60.3 Up 03:55:05 - 04:25:05 5032

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 118228, (2018/01/11 04:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 18.74 157
44Zet Per      03:54:07.9 +31:53:01  2.8  0.90 157
42 Per         03:49:32.6 +33:05:29  5.2  1.14 156
PPM 068938     03:57:19.4 +32:53:17  8.5  0.56 155
PPM 068895     03:54:19.2 +32:56:37  9.1  0.19 156
118228         03:54:44.1 +32:46:13 15.9       156
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:16:02 UT

Marc W. Buie, Southwest Research Institute

RECON