RECON: TNO occultation with 54598

Event between (54598) Bienor and star UC4-668-024120 with event index number of 310854

Geocentric closest approach at 2019/11/17 08:27:53 UTC

J2000 position of star is 04:09:20.5 +43:35:33
Equinox of date position of star is 04:10:39.7 +43:38:27
Stellar brightness R=15.8, use SENSEUP=128
Star is 47 degrees from the moon. Moon is 77% 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 21.3 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 43 seconds.
The 1-sigma cross-track error in the shadow position is 528 km.
The sky-plane scale is 9869.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 9.0 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2019/11/17 08:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.8 +16:32:52  0.8 27.67  43
Mirphak        03:25:45.1 +49:55:49  1.8  9.92  56
PPM 046963     04:19:31.0 +42:11:18  6.1  2.17  46
PPM 046827     04:10:04.9 +43:44:09  8.2  0.15  47
54598          04:10:44.1 +43:38:37 15.8        47
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 24.5 km RECON observability=1.0 and success probability=41.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:27:48 -57.7 Dark Up 83.6 188.8 Up 08:23:41 - 08:31:54 2076
Summerland 08:27:49 -57.9 Dark Up 83.7 186.5 Up 08:23:43 - 08:31:56 2072
Penticton 08:27:49 -58.1 Dark Up 84.0 188.2 Up 08:23:42 - 08:31:55 2036
Okanagan Falls 08:27:49 -58.3 Dark Up 84.2 188.3 Up 08:23:42 - 08:31:55 2015
Oliver 08:27:49 -58.4 Dark Up 84.4 188.7 Up 08:23:42 - 08:31:55 1997
Anarchist Mountain Observatory 08:27:48 -58.6 Dark Up 84.5 190.4 Up 08:23:42 - 08:31:55 1977
Oroville 08:27:48 -58.6 Dark Up 84.6 190.0 Up 08:23:42 - 08:31:55 1969
Tonasket 08:27:48 -58.9 Dark Up 84.8 190.4 Up 08:23:42 - 08:31:55 1944
Okanogan 08:27:49 -59.2 Dark Up 85.2 189.9 Up 08:23:43 - 08:31:56 1907
Brewster 08:27:50 -59.5 Dark Up 85.5 188.7 Up 08:23:43 - 08:31:56 1878
Manson/Chelan 08:27:51 -59.8 Dark Up 85.7 185.6 Up 08:23:44 - 08:31:57 1857
Entiat 08:27:51 -60.0 Dark Up 85.9 185.3 Up 08:23:45 - 08:31:58 1833
Wenatchee 08:27:52 -60.3 Dark Up 86.2 184.5 Up 08:23:45 - 08:31:58 1805
Ellensburg 08:27:53 -60.7 Dark Up 86.6 182.5 Up 08:23:46 - 08:31:59 1761
Yakima 08:27:53 -61.1 Dark Up 87.0 182.6 Up 08:23:47 - 08:32:00 1716
Toppenish/White Swan 08:27:53 -61.3 Dark Up 87.2 185.3 Up 08:23:46 - 08:31:59 1691
Pasco 08:27:48 -61.1 Dark Up 87.1 203.7 Up 08:23:41 - 08:31:54 1671
PNWRO 08:27:47 -61.2 Dark Up 87.3 209.0 Up 08:23:41 - 08:31:54 1643
George/Umatilla 08:27:49 -61.4 Dark Up 87.5 203.5 Up 08:23:42 - 08:31:55 1635
Goldendale 08:27:54 -61.9 Dark Up 87.8 178.8 Up 08:23:48 - 08:32:01 1632
The Dalles 08:27:56 -62.2 Dark Up 88.0 171.2 Up 08:23:49 - 08:32:02 1609
Maupin 08:27:55 -62.6 Dark Up 88.4 171.6 Up 08:23:49 - 08:32:02 1562
Madras/Culver 08:27:56 -63.1 Dark Up 88.9 165.8 Up 08:23:49 - 08:32:02 1502
Sisters 08:27:57 -63.5 Dark Up 89.1 140.2 Up 08:23:51 - 08:32:04 1468
Redmond 08:27:56 -63.4 Dark Up 89.3 156.4 Up 08:23:50 - 08:32:03 1463
Bend 08:27:57 -63.7 Dark Up 89.4 139.4 Up 08:23:50 - 08:32:03 1440
Oregon Observatory 08:27:57 -63.9 Dark Up 89.4 120.6 Up 08:23:51 - 08:32:04 1422
La Pine/Gilchrist 08:27:57 -64.1 Dark Up 89.5 99.0 Up 08:23:51 - 08:32:04 1399
North Lake 08:27:56 -64.3 Dark Up 89.6 16.3 Up 08:23:49 - 08:32:02 1347
Paisley 08:27:54 -64.7 Dark Up 89.1 350.2 Up 08:23:48 - 08:32:01 1284
Chiloquin 08:28:00 -65.2 Dark Up 88.7 37.3 Up 08:23:53 - 08:32:06 1279
Klamath Falls 08:27:59 -65.5 Dark Up 88.4 27.9 Up 08:23:53 - 08:32:06 1240
Lakeview 08:27:54 -65.1 Dark Up 88.6 348.2 Up 08:23:47 - 08:32:00 1227
Tulelake 08:27:58 -65.7 Dark Up 88.3 17.3 Up 08:23:52 - 08:32:05 1208
Cedarville 08:27:54 -65.7 Dark Up 87.9 348.5 Up 08:23:47 - 08:32:00 1153
Fall River/Burney 08:27:58 -66.5 Dark Up 87.4 10.1 Up 08:23:52 - 08:32:05 1107
Susanville 08:27:56 -66.8 Dark Up 86.8 358.6 Up 08:23:49 - 08:32:02 1032
Niwot 08:26:55 -59.6 Dark Up 78.1 292.0 Up 08:22:49 - 08:31:02 1019
Greenville 08:27:57 -67.2 Dark Up 86.5 2.2 Up 08:23:51 - 08:32:04 1004
Gimple 08:27:57 -67.1 Dark Up 86.5 1.2 Up 08:23:50 - 08:32:03 1003
Quincy 08:27:57 -67.4 Dark Up 86.3 2.0 Up 08:23:51 - 08:32:04 982
Portola 08:27:55 -67.3 Dark Up 86.2 356.8 Up 08:23:49 - 08:32:02 965
Reno 08:27:53 -67.3 Dark Up 85.9 350.5 Up 08:23:46 - 08:31:59 931
Carson City 08:27:53 -67.6 Dark Up 85.5 351.1 Up 08:23:46 - 08:31:59 892
Yerington 08:27:50 -67.6 Dark Up 85.2 346.1 Up 08:23:44 - 08:31:57 867
Gardnerville 08:27:53 -67.8 Dark Up 85.3 351.2 Up 08:23:46 - 08:31:59 864
Hawthorne 08:27:48 -67.8 Dark Up 84.7 343.3 Up 08:23:42 - 08:31:55 813
Tonopah 08:27:43 -67.6 Dark Up 83.9 335.6 Up 08:23:36 - 08:31:49 756
Lee Vining 08:27:50 -68.4 Dark Up 84.2 348.2 Up 08:23:44 - 08:31:57 753
Bishop 08:27:48 -68.6 Dark Up 83.5 344.8 Up 08:23:41 - 08:31:54 684
Beatty 08:27:41 -68.3 Dark Up 82.7 337.0 Up 08:23:35 - 08:31:48 627
Lone Pine 08:27:46 -69.1 Dark Up 82.7 344.6 Up 08:23:40 - 08:31:53 598
Indian Springs 08:27:36 -68.0 Dark Up 82.0 333.0 Up 08:23:30 - 08:31:43 589
Henderson 08:27:34 -68.0 Dark Up 81.3 331.7 Up 08:23:27 - 08:31:40 529
CPSLO 08:27:58 -71.3 Dark Up 81.7 359.5 Up 08:23:51 - 08:32:04 470
Searchlight/Boulder City 08:27:34 -68.4 Dark Up 80.7 333.2 Up 08:23:27 - 08:31:40 466
Patrick 08:27:29 -67.8 Dark Up 80.3 329.5 Up 08:23:23 - 08:31:36 460
Kingman/Dolan Springs 08:27:30 -68.1 Dark Up 80.2 330.8 Up 08:23:23 - 08:31:36 436
Laughlin/Bullhead City 08:27:32 -68.4 Dark Up 80.4 332.7 Up 08:23:25 - 08:31:38 433
DCO 08:27:26 -67.6 Dark Up 79.7 328.0 Up 08:23:20 - 08:31:33 427
Mohave Valley 08:27:32 -68.6 Dark Up 80.1 333.4 Up 08:23:25 - 08:31:38 403
Lake Havasu City 08:27:31 -68.7 Dark Up 79.7 333.5 Up 08:23:25 - 08:31:38 359
Wildwood 08:27:50 -71.4 Dark Up 80.4 350.7 Up 08:23:43 - 08:31:56 326
Parker 08:27:31 -68.9 Dark Up 79.3 334.3 Up 08:23:25 - 08:31:38 321
Idyllwild 08:27:41 -70.6 Dark Up 79.7 343.7 Up 08:23:35 - 08:31:48 280
Blythe 08:27:32 -69.5 Dark Up 79.0 336.4 Up 08:23:26 - 08:31:39 264
Calipatria 08:27:36 -70.4 Dark Up 78.8 340.4 Up 08:23:30 - 08:31:43 211
Yuma 08:27:32 -70.1 Dark Up 78.1 338.3 Up 08:23:26 - 08:31:39 163

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, (2019/11/17 08:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 27.67  43
Mirphak        03:24:19.4 +49:51:40  1.8  9.92  56
PPM 046963     04:18:08.2 +42:08:27  6.1  2.17  46
PPM 046827     04:08:41.2 +43:41:04  8.2  0.15  47
54598          04:09:20.5 +43:35:33 15.8        47
Positions are for J2000

Event circumstances last updated at 2018/11/05 21:20:00 UT

Marc W. Buie, Southwest Research Institute

RECON