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 08:14:28 UTC

J2000 position of star is 04:01:55.1 +43:18:32
Equinox of date position of star is 04:03:14.6 +43:21:40
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 35 seconds.
The 1-sigma cross-track error in the shadow position is 558 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=52.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:12:57 -62.9 Dark Up 71.6 258.6 Up 08:09:30 - 08:16:23 1817
Summerland 08:12:58 -63.0 Dark Up 71.9 258.3 Up 08:09:31 - 08:16:24 1813
Penticton 08:12:57 -63.3 Dark Up 71.8 259.5 Up 08:09:31 - 08:16:24 1777
Okanagan Falls 08:12:57 -63.5 Dark Up 71.9 260.0 Up 08:09:31 - 08:16:24 1756
Oliver 08:12:57 -63.6 Dark Up 71.9 260.6 Up 08:09:30 - 08:16:23 1738
Anarchist Mountain Observatory 08:12:57 -63.8 Dark Up 71.8 261.3 Up 08:09:30 - 08:16:23 1718
Oroville 08:12:57 -63.9 Dark Up 71.8 261.4 Up 08:09:31 - 08:16:24 1710
Tonasket 08:12:57 -64.1 Dark Up 71.9 262.1 Up 08:09:31 - 08:16:24 1684
Okanogan 08:12:57 -64.4 Dark Up 72.0 263.0 Up 08:09:31 - 08:16:24 1647
Brewster 08:12:58 -64.7 Dark Up 72.2 263.7 Up 08:09:32 - 08:16:25 1618
Manson/Chelan 08:12:59 -65.0 Dark Up 72.4 264.0 Up 08:09:33 - 08:16:26 1595
Entiat 08:13:00 -65.2 Dark Up 72.5 264.6 Up 08:09:33 - 08:16:26 1571
Wenatchee 08:13:00 -65.5 Dark Up 72.6 265.3 Up 08:09:34 - 08:16:27 1543
Ellensburg 08:13:01 -65.9 Dark Up 72.8 266.4 Up 08:09:34 - 08:16:27 1498
Yakima 08:13:01 -66.3 Dark Up 72.8 267.7 Up 08:09:34 - 08:16:27 1453
Toppenish/White Swan 08:13:00 -66.5 Dark Up 72.7 268.6 Up 08:09:34 - 08:16:27 1428
Pasco 08:12:56 -66.4 Dark Up 71.8 269.9 Up 08:09:30 - 08:16:23 1412
PNWRO 08:12:55 -66.6 Dark Up 71.7 270.8 Up 08:09:29 - 08:16:22 1384
George/Umatilla 08:12:57 -66.8 Dark Up 72.0 270.7 Up 08:09:30 - 08:16:23 1375
Goldendale 08:13:02 -67.1 Dark Up 73.0 270.0 Up 08:09:36 - 08:16:29 1368
The Dalles 08:13:03 -67.3 Dark Up 73.3 270.5 Up 08:09:37 - 08:16:30 1345
Maupin 08:13:03 -67.7 Dark Up 73.2 272.0 Up 08:09:37 - 08:16:30 1298
Madras/Culver 08:13:04 -68.3 Dark Up 73.2 273.8 Up 08:09:37 - 08:16:30 1237
Sisters 08:13:05 -68.7 Dark Up 73.5 274.6 Up 08:09:39 - 08:16:32 1202
Redmond 08:13:04 -68.7 Dark Up 73.2 274.9 Up 08:09:37 - 08:16:30 1198
Bend 08:13:04 -68.9 Dark Up 73.3 275.5 Up 08:09:38 - 08:16:31 1175
Oregon Observatory 08:13:05 -69.1 Dark Up 73.3 276.1 Up 08:09:38 - 08:16:31 1156
La Pine/Gilchrist 08:13:05 -69.3 Dark Up 73.4 276.7 Up 08:09:39 - 08:16:32 1133
North Lake 08:13:03 -69.6 Dark Up 72.9 278.4 Up 08:09:37 - 08:16:30 1083
Paisley 08:13:02 -70.1 Dark Up 72.5 280.2 Up 08:09:36 - 08:16:29 1020
Chiloquin 08:13:07 -70.4 Dark Up 73.4 280.3 Up 08:09:40 - 08:16:33 1012
Klamath Falls 08:13:07 -70.7 Dark Up 73.3 281.4 Up 08:09:40 - 08:16:33 974
Lakeview 08:13:01 -70.6 Dark Up 72.3 281.8 Up 08:09:35 - 08:16:28 964
Tulelake 08:13:06 -71.0 Dark Up 73.0 282.4 Up 08:09:39 - 08:16:32 942
Cedarville 08:13:01 -71.2 Dark Up 72.0 283.8 Up 08:09:34 - 08:16:27 890
Fall River/Burney 08:13:06 -71.9 Dark Up 72.8 285.2 Up 08:09:39 - 08:16:32 842
Niwot 08:12:07 -66.4 Dark Up 60.9 289.3 Up 08:08:41 - 08:15:34 804
Susanville 08:13:03 -72.4 Dark Up 72.1 287.1 Up 08:09:37 - 08:16:30 769
Greenville 08:13:04 -72.7 Dark Up 72.2 288.0 Up 08:09:38 - 08:16:31 740
Gimple 08:13:04 -72.7 Dark Up 72.1 288.0 Up 08:09:38 - 08:16:31 739
Quincy 08:13:04 -72.9 Dark Up 72.1 288.6 Up 08:09:38 - 08:16:31 717
Portola 08:13:03 -72.9 Dark Up 71.7 288.9 Up 08:09:36 - 08:16:29 702
Reno 08:13:00 -73.1 Dark Up 71.2 289.6 Up 08:09:34 - 08:16:27 670
Carson City 08:13:00 -73.4 Dark Up 71.0 290.5 Up 08:09:34 - 08:16:27 631
Yerington 08:12:58 -73.4 Dark Up 70.5 291.0 Up 08:09:32 - 08:16:25 608
Gardnerville 08:13:00 -73.6 Dark Up 70.9 291.2 Up 08:09:34 - 08:16:27 604
Hawthorne 08:12:56 -73.7 Dark Up 70.0 292.1 Up 08:09:30 - 08:16:23 556
Tonopah 08:12:51 -73.7 Dark Up 68.8 293.0 Up 08:09:24 - 08:16:17 503
Lee Vining 08:12:58 -74.4 Dark Up 70.1 293.6 Up 08:09:32 - 08:16:25 495
Bishop 08:12:56 -74.8 Dark Up 69.3 294.9 Up 08:09:29 - 08:16:22 428
Beatty 08:12:49 -74.6 Dark Up 68.0 295.5 Up 08:09:23 - 08:16:16 376
Lone Pine 08:12:55 -75.3 Dark Up 68.8 296.6 Up 08:09:28 - 08:16:21 344
Indian Springs 08:12:45 -74.5 Dark Up 67.1 296.0 Up 08:09:19 - 08:16:12 342
Henderson 08:12:43 -74.6 Dark Up 66.3 296.9 Up 08:09:16 - 08:16:09 285
Searchlight/Boulder City 08:12:43 -75.0 Dark Up 66.0 298.1 Up 08:09:16 - 08:16:09 222
Patrick 08:12:39 -74.5 Dark Up 65.3 297.9 Up 08:09:12 - 08:16:05 220
CPSLO 08:13:05 -77.3 Dark Up 70.0 300.8 Up 08:09:39 - 08:16:32 209
Kingman/Dolan Springs 08:12:39 -74.8 Dark Up 65.3 298.4 Up 08:09:13 - 08:16:06 195
Laughlin/Bullhead City 08:12:41 -75.1 Dark Up 65.6 298.6 Up 08:09:15 - 08:16:08 191
DCO 08:12:36 -74.4 Dark Up 64.6 298.3 Up 08:09:09 - 08:16:02 189
Mohave Valley 08:12:41 -75.3 Dark Up 65.5 299.1 Up 08:09:15 - 08:16:08 161
Lake Havasu City 08:12:40 -75.5 Dark Up 65.1 299.8 Up 08:09:14 - 08:16:07 119
Parker 08:12:40 -75.7 Dark Up 64.9 300.4 Up 08:09:14 - 08:16:07 81
Wildwood 08:12:58 -77.8 Dark Up 67.9 302.3 Up 08:09:31 - 08:16:24 72
Idyllwild 08:12:50 -77.3 Dark Up 66.4 302.1 Up 08:09:24 - 08:16:17 32
Blythe 08:12:42 -76.3 Dark Up 64.9 301.5 Up 08:09:15 - 08:16:08 23
Calipatria 08:12:46 -77.1 Dark Up 65.3 302.8 Up 08:09:19 - 08:16:12 -32
Yuma 08:12:42 -77.0 Dark Up 64.4 303.2 Up 08:09:16 - 08:16:09 -77

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 2019/01/17 21:59:42 UT

Marc W. Buie, Southwest Research Institute

RECON