RECON: TNO occultation with 54598

Event between (54598) Bienor and star UC4-667-021829 with event index number of 230238

Geocentric closest approach at 2019/12/13 08:12:54 UTC

J2000 position of star is 04:01:55.1 +43:18:32
Equinox of date position of star is 04:03:11.3 +43:21:32
Stellar brightness R=15.4, use SENSEUP=128
Star is 35 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=19.2

[RECON map]
TNO is 14.5 AU from the Sun and 13.6 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 7.8 arcsec/hr.
The 1-sigma error in the time of the event is 36 seconds.
The 1-sigma cross-track error in the shadow position is 563 km.
The sky-plane scale is 9856.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 8.9 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2019/12/13 08:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8 27.76  26
Mirphak        03:25:45.4 +49:55:50  1.8  9.19  44
PPM 046552     03:50:31.1 +44:01:24  6.1  2.40  38
PPM 046765     04:05:37.6 +43:05:31  8.5  0.50  35
PPM 046760     04:05:20.9 +43:25:48  9.0  0.38  35
PPM 046723     04:03:25.8 +43:08:42 10.3  0.22  35
54598          04:03:18.3 +43:21:48 15.4        35
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 5.0 sigma about the mid-time.
The median site spacing is 27.9 km RECON observability=1.0 and success probability=53.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:11:24 -63.9 Dark Up 72.1 261.0 Up 08:07:54 - 08:14:54 1679
Tonasket 08:11:24 -64.1 Dark Up 72.1 261.7 Up 08:07:54 - 08:14:54 1653
Okanogan 08:11:24 -64.5 Dark Up 72.3 262.6 Up 08:07:54 - 08:14:54 1616
Brewster 08:11:25 -64.8 Dark Up 72.4 263.3 Up 08:07:55 - 08:14:55 1587
Manson/Chelan 08:11:27 -65.0 Dark Up 72.7 263.6 Up 08:07:57 - 08:14:57 1564
Entiat 08:11:27 -65.2 Dark Up 72.8 264.2 Up 08:07:57 - 08:14:57 1540
Wenatchee 08:11:27 -65.5 Dark Up 72.9 264.9 Up 08:07:57 - 08:14:57 1512
Ellensburg 08:11:28 -65.9 Dark Up 73.0 266.1 Up 08:07:58 - 08:14:58 1467
Yakima 08:11:28 -66.3 Dark Up 73.1 267.4 Up 08:07:58 - 08:14:58 1422
Toppenish/White Swan 08:11:28 -66.5 Dark Up 73.0 268.2 Up 08:07:58 - 08:14:58 1397
Pasco 08:11:24 -66.5 Dark Up 72.1 269.6 Up 08:07:54 - 08:14:54 1380
PNWRO 08:11:23 -66.7 Dark Up 71.9 270.5 Up 08:07:53 - 08:14:53 1352
George/Umatilla 08:11:24 -66.9 Dark Up 72.3 270.5 Up 08:07:54 - 08:14:54 1344
Goldendale 08:11:29 -67.1 Dark Up 73.3 269.7 Up 08:07:59 - 08:14:59 1338
The Dalles 08:11:31 -67.4 Dark Up 73.5 270.2 Up 08:08:01 - 08:15:01 1314
Maupin 08:11:31 -67.8 Dark Up 73.4 271.7 Up 08:08:01 - 08:15:01 1267
Madras/Culver 08:11:31 -68.3 Dark Up 73.4 273.5 Up 08:08:01 - 08:15:01 1207
Sisters 08:11:32 -68.7 Dark Up 73.7 274.4 Up 08:08:02 - 08:15:02 1172
Redmond 08:11:31 -68.7 Dark Up 73.5 274.7 Up 08:08:01 - 08:15:01 1167
Bend 08:11:31 -68.9 Dark Up 73.5 275.4 Up 08:08:01 - 08:15:01 1144
Oregon Observatory 08:11:32 -69.1 Dark Up 73.6 275.9 Up 08:08:02 - 08:15:02 1126
La Pine/Gilchrist 08:11:32 -69.3 Dark Up 73.6 276.6 Up 08:08:02 - 08:15:02 1103
North Lake 08:11:30 -69.7 Dark Up 73.1 278.2 Up 08:08:00 - 08:15:00 1052
Paisley 08:11:29 -70.2 Dark Up 72.8 280.1 Up 08:07:59 - 08:14:59 990
Chiloquin 08:11:34 -70.4 Dark Up 73.7 280.2 Up 08:08:04 - 08:15:04 982
Klamath Falls 08:11:34 -70.8 Dark Up 73.6 281.4 Up 08:08:04 - 08:15:04 943
Lakeview 08:11:29 -70.7 Dark Up 72.6 281.8 Up 08:07:59 - 08:14:59 933
Tulelake 08:11:33 -71.0 Dark Up 73.3 282.3 Up 08:08:03 - 08:15:03 912
Cedarville 08:11:28 -71.3 Dark Up 72.3 283.8 Up 08:07:58 - 08:14:58 860
Fall River/Burney 08:11:33 -71.9 Dark Up 73.0 285.2 Up 08:08:03 - 08:15:03 811
Niwot 08:10:34 -66.7 Dark Up 61.2 289.2 Up 08:07:04 - 08:14:04 767
Susanville 08:11:31 -72.4 Dark Up 72.3 287.2 Up 08:08:01 - 08:15:01 738
Greenville 08:11:31 -72.7 Dark Up 72.5 288.0 Up 08:08:01 - 08:15:01 709
Gimple 08:11:31 -72.7 Dark Up 72.4 288.0 Up 08:08:01 - 08:15:01 709
Quincy 08:11:32 -72.9 Dark Up 72.4 288.6 Up 08:08:02 - 08:15:02 687
Portola 08:11:30 -73.0 Dark Up 72.0 288.9 Up 08:08:00 - 08:15:00 671
Reno 08:11:28 -73.1 Dark Up 71.5 289.6 Up 08:07:58 - 08:14:58 639
Carson City 08:11:28 -73.5 Dark Up 71.3 290.6 Up 08:07:58 - 08:14:58 600
Yerington 08:11:25 -73.5 Dark Up 70.8 291.0 Up 08:07:55 - 08:14:55 577
Gardnerville 08:11:28 -73.7 Dark Up 71.2 291.3 Up 08:07:58 - 08:14:58 573
Hawthorne 08:11:24 -73.8 Dark Up 70.3 292.2 Up 08:07:54 - 08:14:54 524
Tonopah 08:11:18 -73.9 Dark Up 69.1 293.1 Up 08:07:48 - 08:14:48 471
Lee Vining 08:11:26 -74.5 Dark Up 70.4 293.7 Up 08:07:56 - 08:14:56 463
Bishop 08:11:23 -74.9 Dark Up 69.6 295.0 Up 08:07:53 - 08:14:53 396
Beatty 08:11:17 -74.8 Dark Up 68.3 295.6 Up 08:07:47 - 08:14:47 344
Lone Pine 08:11:22 -75.5 Dark Up 69.1 296.7 Up 08:07:52 - 08:14:52 312
Indian Springs 08:11:13 -74.6 Dark Up 67.4 296.1 Up 08:07:43 - 08:14:43 309
Henderson 08:11:10 -74.8 Dark Up 66.6 297.0 Up 08:07:40 - 08:14:40 252
Searchlight/Boulder City 08:11:10 -75.2 Dark Up 66.3 298.2 Up 08:07:40 - 08:14:40 189
Patrick 08:11:06 -74.7 Dark Up 65.5 298.0 Up 08:07:36 - 08:14:36 186
CPSLO 08:11:33 -77.4 Dark Up 70.2 301.0 Up 08:08:03 - 08:15:03 179
Kingman/Dolan Springs 08:11:07 -75.0 Dark Up 65.6 298.5 Up 08:07:37 - 08:14:37 162
Laughlin/Bullhead City 08:11:09 -75.3 Dark Up 65.9 298.7 Up 08:07:39 - 08:14:39 158
DCO 08:11:03 -74.6 Dark Up 64.9 298.4 Up 08:07:33 - 08:14:33 156
Mohave Valley 08:11:09 -75.5 Dark Up 65.8 299.2 Up 08:07:39 - 08:14:39 128
Lake Havasu City 08:11:08 -75.7 Dark Up 65.4 299.9 Up 08:07:38 - 08:14:38 85
Parker 08:11:08 -75.9 Dark Up 65.2 300.6 Up 08:07:38 - 08:14:38 47
Wildwood 08:11:25 -77.9 Dark Up 68.2 302.5 Up 08:07:55 - 08:14:55 41
Idyllwild 08:11:18 -77.5 Dark Up 66.7 302.3 Up 08:07:48 - 08:14:48 4
Blythe 08:11:09 -76.5 Dark Up 65.2 301.6 Up 08:07:39 - 08:14:39 -10
Calipatria 08:11:13 -77.4 Dark Up 65.5 302.9 Up 08:07:43 - 08:14:43 -65
Yuma 08:11:09 -77.2 Dark Up 64.7 303.3 Up 08:07:39 - 08:14:39 -110

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 54598, (2019/12/13 08:13UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 27.76  26
Mirphak        03:24:19.4 +49:51:40  1.8  9.19  44
PPM 046552     03:49:08.1 +43:57:49  6.1  2.40  38
PPM 046765     04:04:14.4 +43:02:18  8.5  0.50  35
PPM 046760     04:03:57.4 +43:22:35  9.0  0.38  35
PPM 046723     04:02:02.7 +43:05:26 10.3  0.22  35
54598          04:01:55.1 +43:18:32 15.4        35
Positions are for J2000

Event circumstances last updated at 2018/04/05 16:18:43 UT

Marc W. Buie, Southwest Research Institute

RECON