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 08:28:11 UTC

J2000 position of star is 04:09:20.5 +43:35:33
Equinox of date position of star is 04:10:40.6 +43:38:29
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 37 seconds.
The 1-sigma cross-track error in the shadow position is 515 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=49.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:28:05 -57.7 Dark Up 83.6 189.3 Up 08:24:30 - 08:31:40 1910
Summerland 08:28:06 -57.8 Dark Up 83.7 187.0 Up 08:24:31 - 08:31:41 1907
Penticton 08:28:05 -58.1 Dark Up 84.0 188.7 Up 08:24:30 - 08:31:40 1871
Okanagan Falls 08:28:05 -58.3 Dark Up 84.2 188.8 Up 08:24:30 - 08:31:40 1850
Oliver 08:28:05 -58.4 Dark Up 84.3 189.2 Up 08:24:30 - 08:31:40 1832
Anarchist Mountain Observatory 08:28:05 -58.5 Dark Up 84.5 190.9 Up 08:24:30 - 08:31:40 1812
Oroville 08:28:05 -58.6 Dark Up 84.6 190.5 Up 08:24:30 - 08:31:40 1804
Tonasket 08:28:05 -58.8 Dark Up 84.8 191.0 Up 08:24:30 - 08:31:40 1778
Okanogan 08:28:06 -59.2 Dark Up 85.2 190.5 Up 08:24:31 - 08:31:41 1742
Brewster 08:28:07 -59.5 Dark Up 85.4 189.3 Up 08:24:32 - 08:31:42 1713
Manson/Chelan 08:28:08 -59.8 Dark Up 85.7 186.3 Up 08:24:33 - 08:31:43 1691
Entiat 08:28:08 -60.0 Dark Up 85.9 186.0 Up 08:24:33 - 08:31:43 1667
Wenatchee 08:28:09 -60.3 Dark Up 86.2 185.3 Up 08:24:34 - 08:31:44 1640
Ellensburg 08:28:10 -60.7 Dark Up 86.6 183.3 Up 08:24:35 - 08:31:45 1595
Yakima 08:28:10 -61.1 Dark Up 87.0 183.5 Up 08:24:35 - 08:31:45 1550
Toppenish/White Swan 08:28:09 -61.2 Dark Up 87.2 186.3 Up 08:24:34 - 08:31:44 1525
Pasco 08:28:05 -61.0 Dark Up 87.1 204.7 Up 08:24:30 - 08:31:40 1506
PNWRO 08:28:04 -61.2 Dark Up 87.2 209.9 Up 08:24:29 - 08:31:39 1477
George/Umatilla 08:28:06 -61.4 Dark Up 87.5 204.6 Up 08:24:31 - 08:31:41 1469
Goldendale 08:28:11 -61.9 Dark Up 87.8 180.1 Up 08:24:36 - 08:31:46 1467
The Dalles 08:28:12 -62.2 Dark Up 88.0 172.7 Up 08:24:37 - 08:31:47 1444
Maupin 08:28:12 -62.5 Dark Up 88.4 173.4 Up 08:24:37 - 08:31:47 1397
Madras/Culver 08:28:13 -63.1 Dark Up 88.9 168.5 Up 08:24:38 - 08:31:48 1337
Sisters 08:28:14 -63.5 Dark Up 89.1 142.8 Up 08:24:39 - 08:31:49 1302
Redmond 08:28:13 -63.4 Dark Up 89.3 160.1 Up 08:24:38 - 08:31:48 1297
Bend 08:28:13 -63.6 Dark Up 89.4 143.3 Up 08:24:38 - 08:31:48 1274
Oregon Observatory 08:28:14 -63.8 Dark Up 89.5 123.4 Up 08:24:39 - 08:31:49 1256
La Pine/Gilchrist 08:28:14 -64.0 Dark Up 89.5 100.0 Up 08:24:39 - 08:31:49 1234
North Lake 08:28:12 -64.3 Dark Up 89.6 8.5 Up 08:24:37 - 08:31:47 1182
Paisley 08:28:11 -64.7 Dark Up 89.1 347.1 Up 08:24:36 - 08:31:46 1118
Chiloquin 08:28:16 -65.2 Dark Up 88.7 35.5 Up 08:24:41 - 08:31:51 1113
Klamath Falls 08:28:16 -65.5 Dark Up 88.5 26.3 Up 08:24:41 - 08:31:51 1075
Lakeview 08:28:11 -65.1 Dark Up 88.6 346.3 Up 08:24:36 - 08:31:46 1061
Tulelake 08:28:15 -65.6 Dark Up 88.3 15.7 Up 08:24:40 - 08:31:50 1043
Cedarville 08:28:10 -65.6 Dark Up 87.9 347.2 Up 08:24:35 - 08:31:45 987
Fall River/Burney 08:28:15 -66.5 Dark Up 87.4 9.0 Up 08:24:40 - 08:31:50 942
Susanville 08:28:12 -66.8 Dark Up 86.8 357.7 Up 08:24:37 - 08:31:47 867
Niwot 08:27:12 -59.6 Dark Up 78.0 291.9 Up 08:23:37 - 08:30:47 855
Greenville 08:28:14 -67.2 Dark Up 86.5 1.4 Up 08:24:39 - 08:31:49 838
Gimple 08:28:13 -67.1 Dark Up 86.5 0.4 Up 08:24:38 - 08:31:48 838
Quincy 08:28:14 -67.3 Dark Up 86.3 1.2 Up 08:24:39 - 08:31:49 816
Portola 08:28:12 -67.3 Dark Up 86.2 356.0 Up 08:24:37 - 08:31:47 799
Reno 08:28:09 -67.3 Dark Up 85.9 349.8 Up 08:24:34 - 08:31:44 766
Carson City 08:28:10 -67.6 Dark Up 85.5 350.5 Up 08:24:35 - 08:31:45 726
Yerington 08:28:07 -67.5 Dark Up 85.2 345.5 Up 08:24:32 - 08:31:42 701
Gardnerville 08:28:09 -67.8 Dark Up 85.3 350.5 Up 08:24:34 - 08:31:44 699
Hawthorne 08:28:05 -67.7 Dark Up 84.7 342.8 Up 08:24:30 - 08:31:40 647
Tonopah 08:27:59 -67.5 Dark Up 83.8 335.2 Up 08:24:24 - 08:31:34 591
Lee Vining 08:28:07 -68.4 Dark Up 84.2 347.8 Up 08:24:32 - 08:31:42 587
Bishop 08:28:04 -68.6 Dark Up 83.5 344.4 Up 08:24:29 - 08:31:39 518
Beatty 08:27:58 -68.2 Dark Up 82.6 336.7 Up 08:24:23 - 08:31:33 462
Lone Pine 08:28:03 -69.1 Dark Up 82.7 344.2 Up 08:24:28 - 08:31:38 433
Indian Springs 08:27:53 -67.9 Dark Up 82.0 332.7 Up 08:24:18 - 08:31:28 424
Henderson 08:27:51 -68.0 Dark Up 81.3 331.5 Up 08:24:16 - 08:31:26 364
CPSLO 08:28:14 -71.3 Dark Up 81.7 359.1 Up 08:24:39 - 08:31:49 304
Searchlight/Boulder City 08:27:50 -68.3 Dark Up 80.7 332.9 Up 08:24:15 - 08:31:25 301
Patrick 08:27:46 -67.8 Dark Up 80.3 329.2 Up 08:24:11 - 08:31:21 295
Kingman/Dolan Springs 08:27:47 -68.0 Dark Up 80.1 330.5 Up 08:24:12 - 08:31:22 270
Laughlin/Bullhead City 08:27:49 -68.4 Dark Up 80.3 332.4 Up 08:24:14 - 08:31:24 268
DCO 08:27:43 -67.6 Dark Up 79.7 327.8 Up 08:24:08 - 08:31:18 262
Mohave Valley 08:27:49 -68.5 Dark Up 80.1 333.1 Up 08:24:14 - 08:31:24 238
Lake Havasu City 08:27:48 -68.7 Dark Up 79.6 333.3 Up 08:24:13 - 08:31:23 194
Wildwood 08:28:06 -71.3 Dark Up 80.3 350.4 Up 08:24:31 - 08:31:41 160
Parker 08:27:48 -68.9 Dark Up 79.3 334.0 Up 08:24:13 - 08:31:23 156
Idyllwild 08:27:58 -70.6 Dark Up 79.6 343.4 Up 08:24:23 - 08:31:33 114
Blythe 08:27:49 -69.4 Dark Up 78.9 336.2 Up 08:24:14 - 08:31:24 98
Calipatria 08:27:53 -70.3 Dark Up 78.8 340.2 Up 08:24:18 - 08:31:28 45
Yuma 08:27:49 -70.1 Dark Up 78.1 338.1 Up 08:24:14 - 08:31:24 -2

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 2019/01/17 21:58:06 UT

Marc W. Buie, Southwest Research Institute

RECON