RECON: TNO occultation with 98UR43

Event between 98UR43 and star UC4-588-017801 with event index number of 172335

Geocentric closest approach at 2018/12/26 09:57:05 UTC

J2000 position of star is 05:22:07.3 +27:27:03
Equinox of date position of star is 05:23:14.7 +27:28:02
Stellar brightness R=14.7, use SENSEUP=128
Star is 64 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 30.8 AU from the Sun and 29.9 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 584 seconds.
The 1-sigma cross-track error in the shadow position is 3649 km.
The sky-plane scale is 21675.3 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=129.4 km assuming a 5% albedo -- 5.5 sec chord
Diameter=52.8 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98UR43, (2018/12/26 09:57UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.7 +16:32:46  0.8 15.29  76
Alnath         05:27:29.6 +28:37:18  1.6  1.48  63
PPM 094294     05:22:11.0 +27:58:29  6.3  0.56  64
PPM 094298     05:22:49.9 +27:26:57 11.0  0.11  64
98UR43         05:23:18.7 +27:28:05 14.7        63
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 1.5 sigma about the mid-time.
The median site spacing is 21.9 km RECON observability=1.0 and success probability=6.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:54:56 -55.6 Dark Up 50.3 253.5 Up 09:39:56 - 10:09:56 6283
Tonasket 09:54:56 -55.8 Dark Up 50.4 253.8 Up 09:39:56 - 10:09:56 6260
Okanogan 09:54:56 -56.1 Dark Up 50.6 254.0 Up 09:39:56 - 10:09:56 6225
Brewster 09:54:56 -56.3 Dark Up 50.8 254.1 Up 09:39:56 - 10:09:56 6195
Manson/Chelan 09:54:56 -56.7 Dark Up 51.1 254.0 Up 09:39:56 - 10:09:56 6167
Entiat 09:54:56 -56.8 Dark Up 51.2 254.2 Up 09:39:56 - 10:09:56 6144
Wenatchee 09:54:55 -57.0 Dark Up 51.3 254.4 Up 09:39:55 - 10:09:55 6117
Ellensburg 09:54:55 -57.4 Dark Up 51.6 254.7 Up 09:39:55 - 10:09:55 6072
Yakima 09:54:54 -57.7 Dark Up 51.7 255.2 Up 09:39:54 - 10:09:54 6032
Pasco 09:54:50 -57.0 Dark Up 50.8 256.9 Up 09:39:50 - 10:09:50 6029
Toppenish/White Swan 09:54:54 -57.7 Dark Up 51.6 255.6 Up 09:39:54 - 10:09:54 6014
PNWRO 09:54:49 -57.1 Dark Up 50.7 257.4 Up 09:39:49 - 10:09:49 6010
George/Umatilla 09:54:50 -57.4 Dark Up 51.0 257.1 Up 09:39:50 - 10:09:50 5992
Goldendale 09:54:53 -58.3 Dark Up 52.1 255.9 Up 09:39:53 - 10:09:53 5951
The Dalles 09:54:54 -58.6 Dark Up 52.4 255.8 Up 09:39:54 - 10:09:54 5921
Maupin 09:54:53 -58.8 Dark Up 52.4 256.4 Up 09:39:53 - 10:09:53 5882
Madras/Culver 09:54:52 -59.1 Dark Up 52.5 257.1 Up 09:39:52 - 10:09:52 5826
Niwot 09:54:05 -50.1 Dark Up 41.3 273.6 Up 09:39:05 - 10:09:05 5795
Redmond 09:54:51 -59.3 Dark Up 52.7 257.5 Up 09:39:51 - 10:09:51 5790
Sisters 09:54:52 -59.6 Dark Up 52.9 257.1 Up 09:39:52 - 10:09:52 5784
Bend 09:54:51 -59.5 Dark Up 52.8 257.6 Up 09:39:51 - 10:09:51 5765
Oregon Observatory 09:54:51 -59.7 Dark Up 52.9 257.8 Up 09:39:51 - 10:09:51 5745
La Pine/Gilchrist 09:54:51 -59.9 Dark Up 53.0 258.0 Up 09:39:51 - 10:09:51 5723
North Lake 09:54:49 -59.7 Dark Up 52.7 259.1 Up 09:39:49 - 10:09:49 5692
Paisley 09:54:46 -59.8 Dark Up 52.5 260.1 Up 09:39:46 - 10:09:46 5645
Chiloquin 09:54:50 -60.7 Dark Up 53.5 259.1 Up 09:39:50 - 10:09:50 5603
Lakeview 09:54:45 -60.0 Dark Up 52.5 260.9 Up 09:39:45 - 10:09:45 5598
Klamath Falls 09:54:49 -60.8 Dark Up 53.5 259.6 Up 09:39:49 - 10:09:49 5570
Tulelake 09:54:48 -60.8 Dark Up 53.3 260.2 Up 09:39:48 - 10:09:48 5550
Cedarville 09:54:43 -60.2 Dark Up 52.5 261.9 Up 09:39:43 - 10:09:43 5535
Fall River/Burney 09:54:46 -61.2 Dark Up 53.4 261.5 Up 09:39:46 - 10:09:46 5459
Susanville 09:54:43 -61.0 Dark Up 53.0 262.9 Up 09:39:43 - 10:09:43 5411
Gimple 09:54:43 -61.3 Dark Up 53.2 263.1 Up 09:39:43 - 10:09:43 5378
Greenville 09:54:43 -61.3 Dark Up 53.2 263.1 Up 09:39:43 - 10:09:43 5376
Quincy 09:54:42 -61.4 Dark Up 53.2 263.3 Up 09:39:42 - 10:09:42 5355
Portola 09:54:41 -61.2 Dark Up 52.9 263.9 Up 09:39:41 - 10:09:41 5353
Reno 09:54:39 -60.8 Dark Up 52.4 264.7 Up 09:39:39 - 10:09:39 5341
Carson City 09:54:38 -61.0 Dark Up 52.4 265.2 Up 09:39:38 - 10:09:38 5305
Yerington 09:54:36 -60.6 Dark Up 52.0 265.8 Up 09:39:36 - 10:09:36 5300
Gardnerville 09:54:38 -61.0 Dark Up 52.4 265.5 Up 09:39:38 - 10:09:38 5281
Hawthorne 09:54:34 -60.4 Dark Up 51.6 266.8 Up 09:39:34 - 10:09:34 5265
Tonopah 09:54:29 -59.6 Dark Up 50.5 268.3 Up 09:39:29 - 10:09:29 5253
Lee Vining 09:54:34 -61.0 Dark Up 52.0 267.2 Up 09:39:34 - 10:09:34 5195
Bishop 09:54:31 -60.7 Dark Up 51.5 268.4 Up 09:39:31 - 10:09:31 5152
Beatty 09:54:26 -59.6 Dark Up 50.2 270.0 Up 09:39:26 - 10:09:26 5146
Indian Springs 09:54:22 -58.9 Dark Up 49.3 271.0 Up 09:39:22 - 10:09:22 5141
Henderson 09:54:20 -58.5 Dark Up 48.8 272.0 Up 09:39:20 - 10:09:20 5105
Lone Pine 09:54:28 -60.7 Dark Up 51.2 269.6 Up 09:39:28 - 10:09:28 5082
Patrick 09:54:16 -57.7 Dark Up 47.8 273.3 Up 09:39:16 - 10:09:16 5071
DCO 09:54:13 -57.3 Dark Up 47.3 274.0 Up 09:39:13 - 10:09:13 5060
Searchlight/Boulder City 09:54:18 -58.6 Dark Up 48.7 272.7 Up 09:39:18 - 10:09:18 5048
Kingman/Dolan Springs 09:54:16 -57.9 Dark Up 48.0 273.4 Up 09:39:16 - 10:09:16 5043
Laughlin/Bullhead City 09:54:17 -58.4 Dark Up 48.4 273.2 Up 09:39:17 - 10:09:17 5027
Mohave Valley 09:54:16 -58.4 Dark Up 48.4 273.5 Up 09:39:16 - 10:09:16 4999
Lake Havasu City 09:54:15 -58.3 Dark Up 48.2 274.1 Up 09:39:15 - 10:09:15 4965
Parker 09:54:15 -58.4 Dark Up 48.1 274.5 Up 09:39:15 - 10:09:15 4929
CPSLO 09:54:34 -63.1 Dark Up 53.3 269.7 Up 09:39:34 - 10:09:34 4882
Blythe 09:54:14 -58.7 Dark Up 48.3 274.9 Up 09:39:14 - 10:09:14 4867
Idyllwild 09:54:20 -60.4 Dark Up 50.1 273.8 Up 09:39:20 - 10:09:20 4820
Wildwood 09:54:26 -61.8 Dark Up 51.6 272.4 Up 09:39:26 - 10:09:26 4807
Calipatria 09:54:16 -59.5 Dark Up 49.1 275.0 Up 09:39:16 - 10:09:16 4789
Yuma 09:54:13 -58.9 Dark Up 48.3 275.9 Up 09:39:13 - 10:09:13 4770

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 98UR43, (2018/12/26 09:57UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 15.29  76
Alnath         05:26:17.5 +28:36:24  1.6  1.48  63
PPM 094294     05:20:59.3 +27:57:25  6.3  0.56  64
PPM 094298     05:21:38.5 +27:25:55 11.0  0.11  64
98UR43         05:22:07.3 +27:27:03 14.7        64
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:08:45 UT

Marc W. Buie, Southwest Research Institute

RECON