RECON: TNO occultation with 98UR43

Event between 98UR43 and star UC4-585-014920 with event index number of 101969

Geocentric closest approach at 2018/01/12 04:55:49 UTC

J2000 position of star is 05:09:46.5 +26:54:47
Equinox of date position of star is 05:10:51.5 +26:56:02
Stellar brightness R=15.9, use SENSEUP=128
Star is 158 degrees from the moon. Moon is 20% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 30.8 AU from the Sun and 30.0 AU from the Earth.
The TNO is moving 19.6 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 473 seconds.
The 1-sigma cross-track error in the shadow position is 3528 km.
The sky-plane scale is 21746.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=129.4 km assuming a 5% albedo -- 6.6 sec chord
Diameter=52.8 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98UR43, (2018/01/12 04:56UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.4 +16:32:39  0.8 13.03 169
Alnath         05:27:26.0 +28:37:16  1.6  4.03 154
PPM 094057     05:07:00.5 +26:27:11  6.4  0.99 159
PPM 094074     05:08:12.5 +27:01:07  8.5  0.61 159
PPM 094111     05:10:26.6 +27:19:12 10.2  0.40 158
98UR43         05:10:53.9 +26:56:05 15.9       158
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 1.9 sigma about the mid-time.
The median site spacing is 24.5 km RECON observability=1.0 and success probability=4.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:56:20 -43.7 Dark Down 66.3 154.5 Up 04:41:20 - 05:11:20 8431
Tonasket 04:56:20 -43.8 Dark Down 66.6 154.3 Up 04:41:20 - 05:11:20 8407
Okanogan 04:56:20 -43.8 Dark Down 66.8 153.6 Up 04:41:20 - 05:11:20 8375
Brewster 04:56:21 -43.8 Dark Down 67.0 152.9 Up 04:41:21 - 05:11:21 8351
Manson/Chelan 04:56:24 -43.6 Dark Down 67.1 151.9 Up 04:41:24 - 05:11:24 8335
Entiat 04:56:24 -43.6 Dark Down 67.2 151.5 Up 04:41:24 - 05:11:24 8314
Wenatchee 04:56:24 -43.7 Dark Down 67.4 151.0 Up 04:41:24 - 05:11:24 8289
Ellensburg 04:56:26 -43.6 Dark Down 67.7 150.1 Up 04:41:26 - 05:11:26 8251
Yakima 04:56:27 -43.7 Dark Down 68.1 149.6 Up 04:41:27 - 05:11:27 8210
Toppenish/White Swan 04:56:26 -43.9 Dark Down 68.3 149.7 Up 04:41:26 - 05:11:26 8185
Pasco 04:56:22 -44.8 Dark Down 68.8 152.3 Up 04:41:22 - 05:11:22 8154
Goldendale 04:56:29 -43.8 Dark Down 68.6 148.0 Up 04:41:29 - 05:11:29 8135
PNWRO 04:56:21 -45.0 Dark Down 69.1 152.6 Up 04:41:21 - 05:11:21 8126
George/Umatilla 04:56:23 -44.7 Dark Down 69.1 151.4 Up 04:41:23 - 05:11:23 8123
The Dalles 04:56:31 -43.6 Dark Down 68.7 146.9 Up 04:41:31 - 05:11:31 8118
Maupin 04:56:31 -43.8 Dark Down 69.1 146.5 Up 04:41:31 - 05:11:31 8073
Madras/Culver 04:56:31 -43.9 Dark Down 69.5 145.6 Up 04:41:31 - 05:11:31 8018
Sisters 04:56:34 -43.6 Dark Down 69.6 144.1 Up 04:41:34 - 05:11:34 7991
Redmond 04:56:32 -43.9 Dark Down 69.8 145.0 Up 04:41:32 - 05:11:32 7982
Bend 04:56:33 -43.9 Dark Down 69.9 144.3 Up 04:41:33 - 05:11:33 7962
Oregon Observatory 04:56:34 -43.8 Dark Down 70.0 143.8 Up 04:41:34 - 05:11:34 7946
La Pine/Gilchrist 04:56:34 -43.8 Dark Down 70.1 143.3 Up 04:41:34 - 05:11:34 7926
North Lake 04:56:32 -44.3 Dark Down 70.7 143.9 Up 04:41:32 - 05:11:32 7871
Chiloquin 04:56:38 -43.8 Dark Down 70.9 140.6 Up 04:41:38 - 05:11:38 7816
Paisley 04:56:32 -44.7 Dark Down 71.3 143.9 Up 04:41:32 - 05:11:32 7808
Klamath Falls 04:56:38 -43.9 Dark Down 71.2 140.1 Up 04:41:38 - 05:11:38 7779
Lakeview 04:56:31 -44.9 Dark Down 71.8 143.4 Up 04:41:31 - 05:11:31 7753
Tulelake 04:56:36 -44.2 Dark Down 71.5 140.3 Up 04:41:36 - 05:11:36 7746
Cedarville 04:56:32 -45.2 Dark Down 72.4 142.7 Up 04:41:32 - 05:11:32 7681
Fall River/Burney 04:56:38 -44.4 Dark Down 72.2 138.7 Up 04:41:38 - 05:11:38 7650
Susanville 04:56:35 -45.0 Dark Down 73.1 139.2 Up 04:41:35 - 05:11:35 7572
Greenville 04:56:37 -44.9 Dark Down 73.1 137.9 Up 04:41:37 - 05:11:37 7548
Gimple 04:56:36 -44.9 Dark Down 73.2 138.1 Up 04:41:36 - 05:11:36 7546
Quincy 04:56:38 -44.9 Dark Down 73.3 137.4 Up 04:41:38 - 05:11:38 7526
Portola 04:56:35 -45.3 Dark Down 73.6 138.3 Up 04:41:35 - 05:11:35 7505
Reno 04:56:33 -45.8 Dark Down 74.2 139.4 Up 04:41:33 - 05:11:33 7466
Carson City 04:56:33 -45.9 Dark Down 74.4 138.7 Up 04:41:33 - 05:11:33 7428
Gardnerville 04:56:33 -46.0 Dark Down 74.7 138.2 Up 04:41:33 - 05:11:33 7401
Yerington 04:56:31 -46.4 Dark Down 74.9 139.9 Up 04:41:31 - 05:11:31 7397
Niwot 04:55:29 -56.3 Dark Down 76.6 191.2 Up 04:40:29 - 05:10:29 7362
Hawthorne 04:56:29 -46.9 Dark Down 75.5 140.3 Up 04:41:29 - 05:11:29 7340
Lee Vining 04:56:32 -46.6 Dark Down 75.7 137.5 Up 04:41:32 - 05:11:32 7287
Tonopah 04:56:24 -48.0 Dark Down 76.6 143.5 Up 04:41:24 - 05:11:24 7269
Bishop 04:56:30 -47.2 Dark Down 76.5 138.0 Up 04:41:30 - 05:11:30 7212
Beatty 04:56:23 -48.6 Dark Down 77.7 141.9 Up 04:41:23 - 05:11:23 7138
Lone Pine 04:56:29 -47.6 Dark Down 77.3 136.8 Up 04:41:29 - 05:11:29 7125
Indian Springs 04:56:18 -49.5 Dark Down 78.5 144.9 Up 04:41:18 - 05:11:18 7087
CPSLO 04:56:42 -45.7 Dark Down 76.6 125.3 Up 04:41:42 - 05:11:42 7028
Henderson 04:56:16 -50.1 Dark Down 79.2 146.1 Up 04:41:16 - 05:11:16 7020
Searchlight/Boulder City 04:56:16 -50.2 Dark Down 79.7 144.6 Up 04:41:16 - 05:11:16 6957
Patrick 04:56:11 -51.1 Dark Down 80.2 149.0 Up 04:41:11 - 05:11:11 6937
Laughlin/Bullhead City 04:56:14 -50.5 Dark Down 80.1 145.1 Up 04:41:14 - 05:11:14 6920
Kingman/Dolan Springs 04:56:12 -51.0 Dark Down 80.3 147.5 Up 04:41:12 - 05:11:12 6915
DCO 04:56:08 -51.7 Dark Down 80.8 151.5 Up 04:41:08 - 05:11:08 6895
Mohave Valley 04:56:14 -50.6 Dark Down 80.4 144.2 Up 04:41:14 - 05:11:14 6890
Wildwood 04:56:34 -47.4 Dark Down 78.6 126.4 Up 04:41:34 - 05:11:34 6863
Lake Havasu City 04:56:14 -50.9 Dark Down 80.8 143.9 Up 04:41:14 - 05:11:14 6843
Parker 04:56:13 -50.9 Dark Down 81.1 142.7 Up 04:41:13 - 05:11:13 6805
Idyllwild 04:56:26 -49.0 Dark Down 80.0 131.0 Up 04:41:26 - 05:11:26 6795
Blythe 04:56:15 -50.7 Dark Down 81.4 139.2 Up 04:41:15 - 05:11:15 6752
Calipatria 04:56:21 -50.0 Dark Down 81.2 132.9 Up 04:41:21 - 05:11:21 6711
Yuma 04:56:16 -50.8 Dark Down 82.0 134.7 Up 04:41:16 - 05:11:16 6651

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, (2018/01/12 04:56UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 13.03 169
Alnath         05:26:17.5 +28:36:24  1.6  4.03 154
PPM 094057     05:05:53.4 +26:25:47  6.4  0.99 159
PPM 094074     05:07:05.1 +26:59:45  8.5  0.61 159
PPM 094111     05:09:19.0 +27:17:54 10.2  0.40 158
98UR43         05:09:46.5 +26:54:47 15.9       158
Positions are for J2000

Event circumstances last updated at 2017/05/17 17:59:13 UT

Marc W. Buie, Southwest Research Institute

RECON