RECON: TNO occultation with 54598

Event between (54598) Bienor and star UC4-659-016218 with event index number of 166686

Geocentric closest approach at 2018/11/26 05:35:30 UTC

J2000 position of star is 03:29:16.7 +41:41:30
Equinox of date position of star is 03:30:28.7 +41:45:09
Stellar brightness R=15.9, use SENSEUP=128
Star is 48 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=19.2

[RECON map]
TNO is 14.8 AU from the Sun and 13.9 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 7.9 arcsec/hr.
The 1-sigma error in the time of the event is 44 seconds.
The 1-sigma cross-track error in the shadow position is 639 km.
The sky-plane scale is 10057.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 8.6 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2018/11/26 05:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.4 +16:32:45  0.8 28.97  34
Algol          03:09:24.4 +41:01:38  2.1  4.03  52
PPM 046142     03:26:24.8 +41:19:23  6.4  0.89  49
PPM 046174     03:27:46.3 +42:20:28  8.1  0.78  49
PPM 046204     03:29:18.2 +41:44:17  9.0  0.23  48
54598          03:30:32.7 +41:45:21 15.9        48
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 23.1 km RECON observability=1.0 and success probability=3.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:36:29 -52.1 Dark Up 72.7 106.2 Up 05:32:21 - 05:40:37 3381
Tonasket 05:36:30 -52.2 Dark Up 72.7 105.5 Up 05:32:22 - 05:40:38 3359
Okanogan 05:36:32 -52.4 Dark Up 72.7 104.3 Up 05:32:24 - 05:40:40 3333
Brewster 05:36:33 -52.4 Dark Up 72.7 103.2 Up 05:32:25 - 05:40:41 3315
Manson/Chelan 05:36:34 -52.3 Dark Up 72.5 102.1 Up 05:32:26 - 05:40:42 3309
Entiat 05:36:35 -52.4 Dark Up 72.5 101.3 Up 05:32:27 - 05:40:43 3292
Wenatchee 05:36:36 -52.5 Dark Up 72.5 100.4 Up 05:32:28 - 05:40:44 3272
Ellensburg 05:36:38 -52.6 Dark Up 72.4 98.9 Up 05:32:30 - 05:40:46 3241
Yakima 05:36:39 -52.8 Dark Up 72.4 97.6 Up 05:32:31 - 05:40:47 3204
Toppenish/White Swan 05:36:39 -53.0 Dark Up 72.6 97.1 Up 05:32:31 - 05:40:47 3177
Goldendale 05:36:42 -53.1 Dark Up 72.4 95.0 Up 05:32:34 - 05:40:50 3142
The Dalles 05:36:43 -53.0 Dark Up 72.1 93.9 Up 05:32:35 - 05:40:51 3136
Pasco 05:36:36 -53.8 Dark Up 73.5 98.0 Up 05:32:28 - 05:40:44 3117
George/Umatilla 05:36:37 -53.9 Dark Up 73.4 96.7 Up 05:32:29 - 05:40:45 3094
Maupin 05:36:44 -53.2 Dark Up 72.2 92.7 Up 05:32:36 - 05:40:52 3092
PNWRO 05:36:36 -54.1 Dark Up 73.6 97.4 Up 05:32:28 - 05:40:44 3085
Madras/Culver 05:36:46 -53.5 Dark Up 72.2 91.0 Up 05:32:38 - 05:40:54 3043
Sisters 05:36:48 -53.4 Dark Up 71.9 89.7 Up 05:32:40 - 05:40:56 3030
Redmond 05:36:47 -53.6 Dark Up 72.2 89.9 Up 05:32:39 - 05:40:55 3011
Bend 05:36:48 -53.7 Dark Up 72.1 89.1 Up 05:32:40 - 05:40:56 2997
Oregon Observatory 05:36:49 -53.7 Dark Up 72.0 88.5 Up 05:32:41 - 05:40:57 2986
La Pine/Gilchrist 05:36:50 -53.7 Dark Up 71.9 87.8 Up 05:32:42 - 05:40:58 2969
North Lake 05:36:49 -54.3 Dark Up 72.4 86.8 Up 05:32:41 - 05:40:57 2903
Chiloquin 05:36:54 -54.0 Dark Up 71.6 84.3 Up 05:32:46 - 05:41:02 2880
Klamath Falls 05:36:54 -54.2 Dark Up 71.6 83.3 Up 05:32:46 - 05:41:02 2844
Paisley 05:36:49 -54.8 Dark Up 72.6 85.3 Up 05:32:41 - 05:40:57 2836
Tulelake 05:36:54 -54.5 Dark Up 71.8 82.6 Up 05:32:46 - 05:41:02 2806
Lakeview 05:36:50 -55.2 Dark Up 72.7 83.7 Up 05:32:42 - 05:40:58 2780
Fall River/Burney 05:36:56 -55.0 Dark Up 71.8 79.9 Up 05:32:48 - 05:41:04 2716
Cedarville 05:36:51 -55.6 Dark Up 72.7 81.7 Up 05:32:43 - 05:40:59 2710
Susanville 05:36:55 -55.7 Dark Up 72.2 78.1 Up 05:32:47 - 05:41:03 2625
Greenville 05:36:57 -55.7 Dark Up 71.9 77.3 Up 05:32:49 - 05:41:05 2611
Gimple 05:36:57 -55.7 Dark Up 72.0 77.3 Up 05:32:49 - 05:41:05 2607
Quincy 05:36:57 -55.7 Dark Up 71.9 76.7 Up 05:32:49 - 05:41:05 2592
Portola 05:36:57 -56.1 Dark Up 72.2 76.3 Up 05:32:49 - 05:41:05 2559
Reno 05:36:55 -56.7 Dark Up 72.6 75.5 Up 05:32:47 - 05:41:03 2506
Carson City 05:36:56 -56.8 Dark Up 72.5 74.4 Up 05:32:48 - 05:41:04 2470
Gardnerville 05:36:56 -57.0 Dark Up 72.5 73.7 Up 05:32:48 - 05:41:04 2445
Yerington 05:36:54 -57.4 Dark Up 73.0 73.8 Up 05:32:46 - 05:41:02 2424
Hawthorne 05:36:54 -57.9 Dark Up 73.2 72.3 Up 05:32:46 - 05:41:02 2357
Lee Vining 05:36:57 -57.8 Dark Up 72.7 70.6 Up 05:32:49 - 05:41:05 2324
Tonopah 05:36:50 -59.1 Dark Up 74.1 70.4 Up 05:32:42 - 05:40:58 2252
Bishop 05:36:56 -58.6 Dark Up 73.0 68.6 Up 05:32:48 - 05:41:04 2234
Lone Pine 05:36:56 -59.1 Dark Up 73.0 66.2 Up 05:32:48 - 05:41:04 2146
CPSLO 05:37:08 -57.6 Dark Up 70.5 63.8 Up 05:33:00 - 05:41:16 2137
Beatty 05:36:51 -60.0 Dark Up 74.0 66.5 Up 05:32:43 - 05:40:59 2120
Indian Springs 05:36:48 -60.9 Dark Up 74.7 64.8 Up 05:32:40 - 05:40:56 2043
Niwot 05:36:00 -65.5 Dark Up 83.5 73.2 Up 05:31:52 - 05:40:08 2021
Henderson 05:36:47 -61.6 Dark Up 74.9 62.5 Up 05:32:39 - 05:40:55 1961
Wildwood 05:37:04 -59.6 Dark Up 71.4 59.5 Up 05:32:56 - 05:41:12 1927
Searchlight/Boulder City 05:36:48 -61.9 Dark Up 74.7 60.6 Up 05:32:40 - 05:40:56 1902
Laughlin/Bullhead City 05:36:47 -62.3 Dark Up 74.8 59.3 Up 05:32:39 - 05:40:55 1858
Patrick 05:36:45 -62.7 Dark Up 75.4 59.4 Up 05:32:37 - 05:40:53 1853
Kingman/Dolan Springs 05:36:46 -62.6 Dark Up 75.2 58.9 Up 05:32:38 - 05:40:54 1839
Mohave Valley 05:36:48 -62.4 Dark Up 74.7 58.5 Up 05:32:40 - 05:40:56 1831
Idyllwild 05:36:58 -61.2 Dark Up 72.6 57.1 Up 05:32:50 - 05:41:06 1808
DCO 05:36:43 -63.3 Dark Up 75.7 57.7 Up 05:32:35 - 05:40:51 1794
Lake Havasu City 05:36:48 -62.7 Dark Up 74.6 57.0 Up 05:32:40 - 05:40:56 1781
Parker 05:36:49 -62.9 Dark Up 74.4 55.9 Up 05:32:41 - 05:40:57 1745
Blythe 05:36:51 -62.8 Dark Up 73.9 54.7 Up 05:32:43 - 05:40:59 1706
Calipatria 05:36:55 -62.3 Dark Up 73.0 54.3 Up 05:32:47 - 05:41:03 1697
Yuma 05:36:53 -63.1 Dark Up 73.4 52.2 Up 05:32:45 - 05:41:01 1616

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, (2018/11/26 05:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 28.97  34
Algol          03:08:10.1 +40:57:20  2.1  4.03  52
PPM 046142     03:25:09.4 +41:15:27  6.4  0.89  49
PPM 046174     03:26:30.1 +42:16:33  8.1  0.78  49
PPM 046204     03:28:02.3 +41:40:25  9.0  0.23  48
54598          03:29:16.7 +41:41:30 15.9        48
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:04:12 UT

Marc W. Buie, Southwest Research Institute

RECON