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 09:48:51 UTC

J2000 position of star is 05:22:07.3 +27:27:03
Equinox of date position of star is 05:23:16.5 +27:28:03
Stellar brightness R=14.7, use SENSEUP=128
Star is 63 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 239 seconds.
The 1-sigma cross-track error in the shadow position is 1903 km.
The sky-plane scale is 21675.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=131.2 km assuming a 5% albedo -- 5.5 sec chord
Diameter=53.6 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98UR43, (2018/12/26 09:49UT)
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  62
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 3.8 sigma about the mid-time.
The median site spacing is 22.4 km RECON observability=1.0 and success probability=0.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:46:46 -56.7 Dark Up 51.6 251.4 Up 09:31:46 - 10:01:46 8295
Tonasket 09:46:46 -56.8 Dark Up 51.7 251.7 Up 09:31:46 - 10:01:46 8273
Okanogan 09:46:46 -57.1 Dark Up 51.9 252.0 Up 09:31:46 - 10:01:46 8237
Brewster 09:46:45 -57.4 Dark Up 52.1 252.1 Up 09:31:45 - 10:01:45 8207
Manson/Chelan 09:46:46 -57.7 Dark Up 52.4 252.0 Up 09:31:46 - 10:01:46 8179
Entiat 09:46:45 -57.9 Dark Up 52.5 252.2 Up 09:31:45 - 10:01:45 8156
Wenatchee 09:46:45 -58.1 Dark Up 52.6 252.4 Up 09:31:45 - 10:01:45 8129
Ellensburg 09:46:45 -58.5 Dark Up 52.9 252.7 Up 09:31:45 - 10:01:45 8084
Yakima 09:46:44 -58.8 Dark Up 53.0 253.2 Up 09:31:44 - 10:01:44 8044
Pasco 09:46:40 -58.2 Dark Up 52.2 255.0 Up 09:31:40 - 10:01:40 8039
Toppenish/White Swan 09:46:43 -58.8 Dark Up 53.0 253.6 Up 09:31:43 - 10:01:43 8026
PNWRO 09:46:38 -58.2 Dark Up 52.1 255.5 Up 09:31:38 - 10:01:38 8019
George/Umatilla 09:46:39 -58.5 Dark Up 52.4 255.2 Up 09:31:39 - 10:01:39 8002
Goldendale 09:46:43 -59.4 Dark Up 53.4 253.9 Up 09:31:43 - 10:01:43 7962
The Dalles 09:46:44 -59.7 Dark Up 53.7 253.9 Up 09:31:44 - 10:01:44 7933
Maupin 09:46:43 -59.9 Dark Up 53.8 254.5 Up 09:31:43 - 10:01:43 7893
Madras/Culver 09:46:42 -60.3 Dark Up 54.0 255.2 Up 09:31:42 - 10:01:42 7837
Redmond 09:46:41 -60.5 Dark Up 54.1 255.6 Up 09:31:41 - 10:01:41 7800
Sisters 09:46:42 -60.7 Dark Up 54.4 255.2 Up 09:31:42 - 10:01:42 7795
Niwot 09:45:53 -51.6 Dark Up 42.9 272.3 Up 09:30:53 - 10:00:53 7786
Bend 09:46:41 -60.7 Dark Up 54.2 255.8 Up 09:31:41 - 10:01:41 7776
Oregon Observatory 09:46:41 -60.9 Dark Up 54.4 255.9 Up 09:31:41 - 10:01:41 7756
La Pine/Gilchrist 09:46:41 -61.1 Dark Up 54.5 256.1 Up 09:31:41 - 10:01:41 7734
North Lake 09:46:38 -61.0 Dark Up 54.1 257.2 Up 09:31:38 - 10:01:38 7702
Paisley 09:46:36 -61.1 Dark Up 54.0 258.3 Up 09:31:36 - 10:01:36 7653
Chiloquin 09:46:40 -61.9 Dark Up 55.0 257.3 Up 09:31:40 - 10:01:40 7613
Lakeview 09:46:35 -61.2 Dark Up 54.0 259.1 Up 09:31:35 - 10:01:35 7606
Klamath Falls 09:46:39 -62.1 Dark Up 55.0 257.8 Up 09:31:39 - 10:01:39 7580
Tulelake 09:46:38 -62.1 Dark Up 54.8 258.5 Up 09:31:38 - 10:01:38 7559
Cedarville 09:46:33 -61.5 Dark Up 54.0 260.2 Up 09:31:33 - 10:01:33 7543
Fall River/Burney 09:46:35 -62.5 Dark Up 54.9 259.8 Up 09:31:35 - 10:01:35 7467
Susanville 09:46:33 -62.4 Dark Up 54.5 261.3 Up 09:31:33 - 10:01:33 7418
Gimple 09:46:33 -62.7 Dark Up 54.7 261.5 Up 09:31:33 - 10:01:33 7385
Greenville 09:46:33 -62.7 Dark Up 54.8 261.4 Up 09:31:33 - 10:01:33 7384
Quincy 09:46:33 -62.8 Dark Up 54.8 261.7 Up 09:31:33 - 10:01:33 7363
Portola 09:46:31 -62.6 Dark Up 54.5 262.3 Up 09:31:31 - 10:01:31 7360
Reno 09:46:29 -62.2 Dark Up 54.0 263.1 Up 09:31:29 - 10:01:29 7347
Carson City 09:46:28 -62.4 Dark Up 54.0 263.7 Up 09:31:28 - 10:01:28 7310
Yerington 09:46:26 -62.0 Dark Up 53.6 264.4 Up 09:31:26 - 10:01:26 7305
Gardnerville 09:46:28 -62.5 Dark Up 54.0 264.0 Up 09:31:28 - 10:01:28 7286
Hawthorne 09:46:24 -61.9 Dark Up 53.2 265.4 Up 09:31:24 - 10:01:24 7269
Tonopah 09:46:19 -61.1 Dark Up 52.1 267.0 Up 09:31:19 - 10:01:19 7254
Lee Vining 09:46:24 -62.5 Dark Up 53.6 265.8 Up 09:31:24 - 10:01:24 7199
Bishop 09:46:21 -62.2 Dark Up 53.1 267.1 Up 09:31:21 - 10:01:21 7154
Beatty 09:46:16 -61.1 Dark Up 51.8 268.7 Up 09:31:16 - 10:01:16 7146
Indian Springs 09:46:12 -60.4 Dark Up 51.0 269.8 Up 09:31:12 - 10:01:12 7140
Henderson 09:46:10 -60.1 Dark Up 50.4 270.8 Up 09:31:10 - 10:01:10 7103
Lone Pine 09:46:19 -62.2 Dark Up 52.9 268.3 Up 09:31:19 - 10:01:19 7083
Patrick 09:46:05 -59.4 Dark Up 49.5 272.2 Up 09:31:05 - 10:01:05 7068
DCO 09:46:03 -58.9 Dark Up 48.9 272.9 Up 09:31:03 - 10:01:03 7055
Searchlight/Boulder City 09:46:08 -60.2 Dark Up 50.4 271.6 Up 09:31:08 - 10:01:08 7045
Kingman/Dolan Springs 09:46:05 -59.6 Dark Up 49.7 272.4 Up 09:31:05 - 10:01:05 7040
Laughlin/Bullhead City 09:46:06 -60.0 Dark Up 50.1 272.1 Up 09:31:06 - 10:01:06 7023
Mohave Valley 09:46:06 -60.1 Dark Up 50.1 272.4 Up 09:31:06 - 10:01:06 6995
Lake Havasu City 09:46:05 -59.9 Dark Up 49.8 273.0 Up 09:31:05 - 10:01:05 6961
Parker 09:46:04 -60.0 Dark Up 49.8 273.5 Up 09:31:04 - 10:01:04 6925
CPSLO 09:46:25 -64.6 Dark Up 55.0 268.5 Up 09:31:25 - 10:01:25 6886
Blythe 09:46:04 -60.4 Dark Up 50.0 273.9 Up 09:31:04 - 10:01:04 6862
Idyllwild 09:46:10 -62.0 Dark Up 51.8 272.8 Up 09:31:10 - 10:01:10 6818
Wildwood 09:46:17 -63.4 Dark Up 53.3 271.3 Up 09:31:17 - 10:01:17 6808
Calipatria 09:46:06 -61.2 Dark Up 50.8 274.1 Up 09:31:06 - 10:01:06 6786
Yuma 09:46:03 -60.6 Dark Up 50.0 275.0 Up 09:31:03 - 10:01:03 6765

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 09:49UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 15.29  76
Alnath         05:26:17.5 +28:36:23  1.6  1.48  62
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        63
Positions are for J2000

Event circumstances last updated at 2018/05/24 02:04:29 UT

Marc W. Buie, Southwest Research Institute

RECON