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 08:14:42 UTC

J2000 position of star is 04:01:55.1 +43:18:32
Equinox of date position of star is 04:03:18.3 +43:21:48
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 30 seconds.
The 1-sigma cross-track error in the shadow position is 531 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 08:15UT)
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=35.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 08:13:11 -62.5 Dark Up 71.5 257.7 Up 08:10:09 - 08:16:13 2209
Kelowna 08:13:11 -62.9 Dark Up 71.7 258.7 Up 08:10:09 - 08:16:13 2166
Summerland 08:13:12 -63.2 Dark Up 71.8 259.2 Up 08:10:10 - 08:16:14 2137
Penticton 08:13:11 -63.3 Dark Up 71.8 259.6 Up 08:10:09 - 08:16:13 2130
Oliver 08:13:11 -63.6 Dark Up 71.8 260.6 Up 08:10:09 - 08:16:13 2091
Anarchist Mountain Observatory 08:13:11 -63.8 Dark Up 71.7 261.3 Up 08:10:09 - 08:16:13 2071
Tonasket 08:13:11 -64.1 Dark Up 71.8 262.2 Up 08:10:09 - 08:16:13 2037
Victoria 08:13:24 -64.6 Dark Up 74.4 258.4 Up 08:10:22 - 08:16:26 2032
Okanogan 08:13:11 -64.4 Dark Up 72.0 263.1 Up 08:10:09 - 08:16:13 2000
Brewster 08:13:12 -64.7 Dark Up 72.1 263.7 Up 08:10:10 - 08:16:14 1970
Manson/Chelan 08:13:13 -65.0 Dark Up 72.4 264.0 Up 08:10:11 - 08:16:15 1948
Entiat 08:13:13 -65.2 Dark Up 72.5 264.6 Up 08:10:11 - 08:16:15 1924
Wenatchee 08:13:14 -65.5 Dark Up 72.6 265.3 Up 08:10:12 - 08:16:16 1896
Ellensburg 08:13:15 -65.9 Dark Up 72.7 266.5 Up 08:10:13 - 08:16:17 1850
Yakima 08:13:15 -66.3 Dark Up 72.8 267.8 Up 08:10:13 - 08:16:17 1805
Toppenish/White Swan 08:13:14 -66.5 Dark Up 72.7 268.6 Up 08:10:12 - 08:16:16 1781
Pasco 08:13:10 -66.4 Dark Up 71.8 269.9 Up 08:10:08 - 08:16:12 1764
PNWRO 08:13:09 -66.6 Dark Up 71.6 270.8 Up 08:10:07 - 08:16:11 1736
Goldendale 08:13:16 -67.1 Dark Up 73.0 270.1 Up 08:10:14 - 08:16:18 1721
The Dalles 08:13:17 -67.3 Dark Up 73.2 270.6 Up 08:10:15 - 08:16:19 1697
Maupin 08:13:17 -67.7 Dark Up 73.1 272.0 Up 08:10:15 - 08:16:19 1650
Sisters 08:13:19 -68.7 Dark Up 73.4 274.7 Up 08:10:17 - 08:16:21 1555
Redmond 08:13:18 -68.6 Dark Up 73.1 274.9 Up 08:10:16 - 08:16:20 1550
Bend 08:13:18 -68.9 Dark Up 73.2 275.6 Up 08:10:16 - 08:16:20 1527
Oregon Observatory 08:13:19 -69.1 Dark Up 73.3 276.1 Up 08:10:17 - 08:16:21 1508
La Pine/Gilchrist 08:13:19 -69.3 Dark Up 73.3 276.7 Up 08:10:17 - 08:16:21 1486
North Lake 08:13:17 -69.6 Dark Up 72.8 278.4 Up 08:10:15 - 08:16:19 1435
Paisley 08:13:16 -70.1 Dark Up 72.5 280.2 Up 08:10:14 - 08:16:18 1373
Klamath Falls 08:13:20 -70.7 Dark Up 73.3 281.5 Up 08:10:18 - 08:16:22 1326
Lakeview 08:13:15 -70.6 Dark Up 72.2 281.8 Up 08:10:13 - 08:16:17 1316
Cedarville 08:13:15 -71.2 Dark Up 72.0 283.9 Up 08:10:13 - 08:16:17 1243
Fall River/Burney 08:13:19 -71.9 Dark Up 72.7 285.2 Up 08:10:17 - 08:16:21 1194
Niwot 08:12:21 -66.4 Dark Up 60.9 289.3 Up 08:09:19 - 08:15:23 1157
SwRI 08:12:21 -66.5 Dark Up 60.9 289.5 Up 08:09:19 - 08:15:23 1144
Susanville 08:13:17 -72.4 Dark Up 72.0 287.1 Up 08:10:15 - 08:16:19 1121
Greenville 08:13:18 -72.7 Dark Up 72.1 288.0 Up 08:10:16 - 08:16:20 1092
Gimple 08:13:18 -72.7 Dark Up 72.1 288.0 Up 08:10:16 - 08:16:20 1092
Quincy 08:13:18 -72.9 Dark Up 72.1 288.6 Up 08:10:16 - 08:16:20 1070
Portola 08:13:17 -72.9 Dark Up 71.7 288.9 Up 08:10:15 - 08:16:19 1054
Reno 08:13:14 -73.0 Dark Up 71.1 289.6 Up 08:10:12 - 08:16:16 1023
Carson City 08:13:14 -73.4 Dark Up 71.0 290.5 Up 08:10:12 - 08:16:16 983
Yerington 08:13:12 -73.4 Dark Up 70.5 291.0 Up 08:10:10 - 08:16:14 960
Gardnerville 08:13:14 -73.6 Dark Up 70.9 291.2 Up 08:10:12 - 08:16:16 956
Hawthorne 08:13:10 -73.7 Dark Up 69.9 292.1 Up 08:10:08 - 08:16:12 908
Tonopah 08:13:05 -73.7 Dark Up 68.7 293.0 Up 08:10:03 - 08:16:07 856
Lee Vining 08:13:12 -74.4 Dark Up 70.1 293.6 Up 08:10:10 - 08:16:14 847
Bishop 08:13:09 -74.7 Dark Up 69.3 294.9 Up 08:10:07 - 08:16:11 780
Beatty 08:13:03 -74.6 Dark Up 67.9 295.5 Up 08:10:01 - 08:16:05 729
Indian Springs 08:12:59 -74.4 Dark Up 67.0 296.0 Up 08:09:57 - 08:16:01 694
Henderson 08:12:57 -74.6 Dark Up 66.3 296.9 Up 08:09:55 - 08:15:59 638
Searchlight/Boulder City 08:12:56 -75.0 Dark Up 66.0 298.1 Up 08:09:54 - 08:15:58 575
Patrick 08:12:52 -74.5 Dark Up 65.2 297.9 Up 08:09:50 - 08:15:54 573
CPSLO 08:13:19 -77.3 Dark Up 69.9 300.7 Up 08:10:17 - 08:16:21 562
Kingman/Dolan Springs 08:12:53 -74.8 Dark Up 65.2 298.4 Up 08:09:51 - 08:15:55 548
Laughlin/Bullhead City 08:12:55 -75.1 Dark Up 65.6 298.6 Up 08:09:53 - 08:15:57 544
DCO 08:12:50 -74.4 Dark Up 64.6 298.3 Up 08:09:48 - 08:15:52 542
Mohave Valley 08:12:55 -75.3 Dark Up 65.5 299.1 Up 08:09:53 - 08:15:57 514
Lake Havasu City 08:12:54 -75.4 Dark Up 65.1 299.8 Up 08:09:52 - 08:15:56 472
Parker 08:12:54 -75.7 Dark Up 64.9 300.4 Up 08:09:52 - 08:15:56 434
Wildwood 08:13:11 -77.8 Dark Up 67.9 302.3 Up 08:10:09 - 08:16:13 424
George/Scottsdale 08:12:45 -74.5 Dark Up 63.0 300.4 Up 08:09:43 - 08:15:47 399
Idyllwild 08:13:04 -77.3 Dark Up 66.4 302.1 Up 08:10:02 - 08:16:06 384
Blythe 08:12:55 -76.2 Dark Up 64.8 301.5 Up 08:09:53 - 08:15:57 376
Calipatria 08:13:00 -77.1 Dark Up 65.2 302.7 Up 08:09:58 - 08:16:02 320
Yuma 08:12:56 -76.9 Dark Up 64.4 303.1 Up 08:09:54 - 08:15:58 276

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 08:15UT)
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 2019/12/10 22:45:55 UT

Marc W. Buie, Southwest Research Institute

RECON