RECON: TNO occultation with 54598

Event between (54598) Bienor and star UC4-667-021829 with event index number of 310875

Geocentric closest approach at 2019/12/13 08:14:10 UTC

J2000 position of star is 04:01:55.1 +43:18:32
Equinox of date position of star is 04:03:13.7 +43:21:38
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 41 seconds.
The 1-sigma cross-track error in the shadow position is 596 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 08:14UT)
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 25.9 km RECON observability=1.0 and success probability=48.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:12:39 -62.9 Dark Up 71.7 258.5 Up 08:08:44 - 08:16:34 1893
Summerland 08:12:40 -63.0 Dark Up 71.9 258.2 Up 08:08:45 - 08:16:35 1889
Penticton 08:12:40 -63.3 Dark Up 71.9 259.4 Up 08:08:45 - 08:16:35 1853
Okanagan Falls 08:12:40 -63.5 Dark Up 71.9 260.0 Up 08:08:45 - 08:16:35 1832
Oliver 08:12:40 -63.6 Dark Up 71.9 260.5 Up 08:08:45 - 08:16:35 1814
Anarchist Mountain Observatory 08:12:39 -63.8 Dark Up 71.8 261.2 Up 08:08:44 - 08:16:34 1794
Oroville 08:12:40 -63.9 Dark Up 71.9 261.4 Up 08:08:45 - 08:16:35 1786
Tonasket 08:12:40 -64.1 Dark Up 71.9 262.1 Up 08:08:45 - 08:16:35 1760
Okanogan 08:12:40 -64.4 Dark Up 72.1 262.9 Up 08:08:45 - 08:16:35 1723
Brewster 08:12:40 -64.7 Dark Up 72.2 263.6 Up 08:08:45 - 08:16:35 1694
Manson/Chelan 08:12:42 -65.0 Dark Up 72.5 263.9 Up 08:08:47 - 08:16:37 1671
Entiat 08:12:42 -65.2 Dark Up 72.6 264.5 Up 08:08:47 - 08:16:37 1647
Wenatchee 08:12:43 -65.5 Dark Up 72.7 265.2 Up 08:08:48 - 08:16:38 1619
Ellensburg 08:12:44 -65.9 Dark Up 72.8 266.4 Up 08:08:49 - 08:16:39 1574
Yakima 08:12:44 -66.3 Dark Up 72.9 267.7 Up 08:08:49 - 08:16:39 1529
Toppenish/White Swan 08:12:43 -66.5 Dark Up 72.8 268.5 Up 08:08:48 - 08:16:38 1504
Pasco 08:12:39 -66.4 Dark Up 71.9 269.8 Up 08:08:44 - 08:16:34 1488
PNWRO 08:12:38 -66.7 Dark Up 71.7 270.7 Up 08:08:43 - 08:16:33 1460
George/Umatilla 08:12:40 -66.8 Dark Up 72.0 270.7 Up 08:08:45 - 08:16:35 1451
Goldendale 08:12:44 -67.1 Dark Up 73.1 270.0 Up 08:08:49 - 08:16:39 1444
The Dalles 08:12:46 -67.4 Dark Up 73.3 270.5 Up 08:08:51 - 08:16:41 1421
Maupin 08:12:46 -67.8 Dark Up 73.2 271.9 Up 08:08:51 - 08:16:41 1374
Madras/Culver 08:12:46 -68.3 Dark Up 73.2 273.7 Up 08:08:51 - 08:16:41 1313
Sisters 08:12:48 -68.7 Dark Up 73.5 274.6 Up 08:08:53 - 08:16:43 1278
Redmond 08:12:46 -68.7 Dark Up 73.2 274.9 Up 08:08:51 - 08:16:41 1274
Bend 08:12:47 -68.9 Dark Up 73.3 275.5 Up 08:08:52 - 08:16:42 1251
Oregon Observatory 08:12:47 -69.1 Dark Up 73.4 276.0 Up 08:08:52 - 08:16:42 1232
La Pine/Gilchrist 08:12:48 -69.3 Dark Up 73.4 276.7 Up 08:08:53 - 08:16:43 1210
North Lake 08:12:46 -69.6 Dark Up 72.9 278.3 Up 08:08:51 - 08:16:41 1159
Paisley 08:12:44 -70.1 Dark Up 72.6 280.2 Up 08:08:49 - 08:16:39 1097
Chiloquin 08:12:49 -70.4 Dark Up 73.5 280.3 Up 08:08:54 - 08:16:44 1088
Klamath Falls 08:12:49 -70.7 Dark Up 73.4 281.4 Up 08:08:54 - 08:16:44 1050
Lakeview 08:12:44 -70.6 Dark Up 72.3 281.8 Up 08:08:49 - 08:16:39 1040
Tulelake 08:12:48 -71.0 Dark Up 73.1 282.4 Up 08:08:53 - 08:16:43 1019
Cedarville 08:12:44 -71.2 Dark Up 72.1 283.8 Up 08:08:49 - 08:16:39 967
Fall River/Burney 08:12:48 -71.9 Dark Up 72.8 285.2 Up 08:08:53 - 08:16:43 918
Niwot 08:11:49 -66.5 Dark Up 60.9 289.3 Up 08:07:54 - 08:15:44 879
Susanville 08:12:46 -72.4 Dark Up 72.1 287.1 Up 08:08:51 - 08:16:41 845
Greenville 08:12:47 -72.7 Dark Up 72.2 288.0 Up 08:08:52 - 08:16:42 816
Gimple 08:12:47 -72.7 Dark Up 72.2 288.0 Up 08:08:52 - 08:16:42 815
Quincy 08:12:47 -72.9 Dark Up 72.2 288.6 Up 08:08:52 - 08:16:42 794
Portola 08:12:45 -72.9 Dark Up 71.8 288.9 Up 08:08:50 - 08:16:40 778
Reno 08:12:43 -73.1 Dark Up 71.2 289.6 Up 08:08:48 - 08:16:38 746
Carson City 08:12:43 -73.4 Dark Up 71.1 290.6 Up 08:08:48 - 08:16:38 707
Yerington 08:12:40 -73.5 Dark Up 70.6 291.0 Up 08:08:45 - 08:16:35 684
Gardnerville 08:12:43 -73.6 Dark Up 71.0 291.2 Up 08:08:48 - 08:16:38 680
Hawthorne 08:12:39 -73.8 Dark Up 70.0 292.1 Up 08:08:44 - 08:16:34 632
Tonopah 08:12:33 -73.8 Dark Up 68.8 293.0 Up 08:08:38 - 08:16:28 579
Lee Vining 08:12:41 -74.4 Dark Up 70.2 293.6 Up 08:08:46 - 08:16:36 571
Bishop 08:12:38 -74.8 Dark Up 69.4 294.9 Up 08:08:43 - 08:16:33 504
Beatty 08:12:32 -74.6 Dark Up 68.0 295.6 Up 08:08:37 - 08:16:27 452
Lone Pine 08:12:37 -75.4 Dark Up 68.8 296.6 Up 08:08:42 - 08:16:32 420
Indian Springs 08:12:28 -74.5 Dark Up 67.1 296.0 Up 08:08:33 - 08:16:23 418
Henderson 08:12:26 -74.6 Dark Up 66.4 297.0 Up 08:08:31 - 08:16:21 361
Searchlight/Boulder City 08:12:25 -75.1 Dark Up 66.1 298.1 Up 08:08:30 - 08:16:20 298
Patrick 08:12:21 -74.6 Dark Up 65.3 297.9 Up 08:08:26 - 08:16:16 295
CPSLO 08:12:48 -77.3 Dark Up 70.0 300.8 Up 08:08:53 - 08:16:43 285
Kingman/Dolan Springs 08:12:22 -74.8 Dark Up 65.3 298.4 Up 08:08:27 - 08:16:17 271
Laughlin/Bullhead City 08:12:24 -75.1 Dark Up 65.7 298.6 Up 08:08:29 - 08:16:19 267
DCO 08:12:18 -74.4 Dark Up 64.7 298.3 Up 08:08:23 - 08:16:13 265
Mohave Valley 08:12:24 -75.3 Dark Up 65.6 299.1 Up 08:08:29 - 08:16:19 237
Lake Havasu City 08:12:23 -75.5 Dark Up 65.2 299.8 Up 08:08:28 - 08:16:18 194
Parker 08:12:23 -75.8 Dark Up 65.0 300.4 Up 08:08:28 - 08:16:18 156
Wildwood 08:12:40 -77.8 Dark Up 68.0 302.4 Up 08:08:45 - 08:16:35 148
Idyllwild 08:12:33 -77.3 Dark Up 66.5 302.2 Up 08:08:38 - 08:16:28 108
Blythe 08:12:24 -76.3 Dark Up 64.9 301.5 Up 08:08:29 - 08:16:19 99
Calipatria 08:12:28 -77.2 Dark Up 65.3 302.8 Up 08:08:33 - 08:16:23 43
Yuma 08:12:25 -77.0 Dark Up 64.5 303.2 Up 08:08:30 - 08:16:20 -3

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 08:14UT)
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 2018/11/05 21:20:27 UT

Marc W. Buie, Southwest Research Institute

RECON