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 05:23:12.7 +27:28:00
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 403 seconds.
The 1-sigma cross-track error in the shadow position is 2632 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 2.2 sigma about the mid-time.
The median site spacing is 21.8 km RECON observability=1.0 and success probability=5.4%
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 6289
Tonasket 09:54:56 -55.8 Dark Up 50.4 253.8 Up 09:39:56 - 10:09:56 6267
Okanogan 09:54:55 -56.1 Dark Up 50.6 254.0 Up 09:39:55 - 10:09:55 6231
Brewster 09:54:55 -56.3 Dark Up 50.8 254.1 Up 09:39:55 - 10:09:55 6201
Manson/Chelan 09:54:56 -56.7 Dark Up 51.1 254.0 Up 09:39:56 - 10:09:56 6173
Entiat 09:54:55 -56.8 Dark Up 51.2 254.2 Up 09:39:55 - 10:09:55 6150
Wenatchee 09:54:55 -57.0 Dark Up 51.3 254.4 Up 09:39:55 - 10:09:55 6123
Ellensburg 09:54:55 -57.4 Dark Up 51.6 254.7 Up 09:39:55 - 10:09:55 6079
Yakima 09:54:53 -57.7 Dark Up 51.7 255.2 Up 09:39:53 - 10:09:53 6038
Pasco 09:54:49 -57.0 Dark Up 50.8 256.9 Up 09:39:49 - 10:09:49 6036
Toppenish/White Swan 09:54:53 -57.7 Dark Up 51.6 255.6 Up 09:39:53 - 10:09:53 6021
PNWRO 09:54:48 -57.1 Dark Up 50.7 257.4 Up 09:39:48 - 10:09:48 6017
George/Umatilla 09:54:49 -57.4 Dark Up 51.0 257.1 Up 09:39:49 - 10:09:49 5998
Goldendale 09:54:53 -58.3 Dark Up 52.1 255.9 Up 09:39:53 - 10:09:53 5957
The Dalles 09:54:53 -58.6 Dark Up 52.4 255.8 Up 09:39:53 - 10:09:53 5927
Maupin 09:54:52 -58.8 Dark Up 52.4 256.4 Up 09:39:52 - 10:09:52 5888
Madras/Culver 09:54:51 -59.1 Dark Up 52.5 257.1 Up 09:39:51 - 10:09:51 5833
Niwot 09:54:05 -50.1 Dark Up 41.3 273.6 Up 09:39:05 - 10:09:05 5804
Redmond 09:54:51 -59.3 Dark Up 52.7 257.5 Up 09:39:51 - 10:09:51 5796
Sisters 09:54:52 -59.6 Dark Up 52.9 257.1 Up 09:39:52 - 10:09:52 5790
Bend 09:54:51 -59.5 Dark Up 52.8 257.6 Up 09:39:51 - 10:09:51 5772
Oregon Observatory 09:54:50 -59.7 Dark Up 52.9 257.8 Up 09:39:50 - 10:09:50 5752
La Pine/Gilchrist 09:54:50 -59.9 Dark Up 53.0 258.0 Up 09:39:50 - 10:09:50 5730
North Lake 09:54:48 -59.7 Dark Up 52.7 259.0 Up 09:39:48 - 10:09:48 5699
Paisley 09:54:46 -59.8 Dark Up 52.5 260.1 Up 09:39:46 - 10:09:46 5652
Chiloquin 09:54:49 -60.7 Dark Up 53.5 259.1 Up 09:39:49 - 10:09:49 5610
Lakeview 09:54:45 -60.0 Dark Up 52.5 260.9 Up 09:39:45 - 10:09:45 5605
Klamath Falls 09:54:48 -60.8 Dark Up 53.5 259.6 Up 09:39:48 - 10:09:48 5577
Tulelake 09:54:47 -60.8 Dark Up 53.3 260.2 Up 09:39:47 - 10:09:47 5556
Cedarville 09:54:42 -60.2 Dark Up 52.5 261.8 Up 09:39:42 - 10:09:42 5542
Fall River/Burney 09:54:45 -61.2 Dark Up 53.4 261.5 Up 09:39:45 - 10:09:45 5465
Susanville 09:54:42 -61.0 Dark Up 53.0 262.9 Up 09:39:42 - 10:09:42 5418
Gimple 09:54:42 -61.3 Dark Up 53.2 263.1 Up 09:39:42 - 10:09:42 5385
Greenville 09:54:42 -61.3 Dark Up 53.2 263.1 Up 09:39:42 - 10:09:42 5383
Quincy 09:54:42 -61.4 Dark Up 53.2 263.3 Up 09:39:42 - 10:09:42 5362
Portola 09:54:40 -61.2 Dark Up 52.9 263.8 Up 09:39:40 - 10:09:40 5360
Reno 09:54:38 -60.8 Dark Up 52.4 264.7 Up 09:39:38 - 10:09:38 5348
Carson City 09:54:37 -61.0 Dark Up 52.5 265.1 Up 09:39:37 - 10:09:37 5312
Yerington 09:54:35 -60.6 Dark Up 52.0 265.8 Up 09:39:35 - 10:09:35 5308
Gardnerville 09:54:37 -61.0 Dark Up 52.4 265.5 Up 09:39:37 - 10:09:37 5288
Hawthorne 09:54:33 -60.4 Dark Up 51.6 266.8 Up 09:39:33 - 10:09:33 5273
Tonopah 09:54:28 -59.6 Dark Up 50.5 268.3 Up 09:39:28 - 10:09:28 5261
Lee Vining 09:54:33 -61.0 Dark Up 52.0 267.2 Up 09:39:33 - 10:09:33 5203
Bishop 09:54:30 -60.7 Dark Up 51.5 268.4 Up 09:39:30 - 10:09:30 5159
Beatty 09:54:25 -59.6 Dark Up 50.2 270.0 Up 09:39:25 - 10:09:25 5154
Indian Springs 09:54:22 -58.9 Dark Up 49.3 271.0 Up 09:39:22 - 10:09:22 5149
Henderson 09:54:19 -58.5 Dark Up 48.8 272.0 Up 09:39:19 - 10:09:19 5113
Lone Pine 09:54:28 -60.7 Dark Up 51.2 269.6 Up 09:39:28 - 10:09:28 5089
Patrick 09:54:15 -57.8 Dark Up 47.8 273.3 Up 09:39:15 - 10:09:15 5080
DCO 09:54:13 -57.3 Dark Up 47.3 274.0 Up 09:39:13 - 10:09:13 5069
Searchlight/Boulder City 09:54:18 -58.6 Dark Up 48.7 272.7 Up 09:39:18 - 10:09:18 5056
Kingman/Dolan Springs 09:54:15 -58.0 Dark Up 48.0 273.4 Up 09:39:15 - 10:09:15 5052
Laughlin/Bullhead City 09:54:16 -58.4 Dark Up 48.4 273.2 Up 09:39:16 - 10:09:16 5035
Mohave Valley 09:54:16 -58.4 Dark Up 48.4 273.5 Up 09:39:16 - 10:09:16 5007
Lake Havasu City 09:54:15 -58.3 Dark Up 48.2 274.1 Up 09:39:15 - 10:09:15 4973
Parker 09:54:14 -58.4 Dark Up 48.1 274.5 Up 09:39:14 - 10:09:14 4937
CPSLO 09:54:33 -63.1 Dark Up 53.3 269.7 Up 09:39:33 - 10:09:33 4889
Blythe 09:54:14 -58.7 Dark Up 48.3 274.9 Up 09:39:14 - 10:09:14 4875
Idyllwild 09:54:20 -60.4 Dark Up 50.1 273.8 Up 09:39:20 - 10:09:20 4828
Wildwood 09:54:25 -61.8 Dark Up 51.6 272.4 Up 09:39:25 - 10:09:25 4815
Calipatria 09:54:16 -59.5 Dark Up 49.1 275.0 Up 09:39:16 - 10:09:16 4797
Yuma 09:54:13 -58.9 Dark Up 48.3 275.9 Up 09:39:13 - 10:09:13 4778

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 2017/05/20 18:07:23 UT

Marc W. Buie, Southwest Research Institute

RECON