RECON: TNO occultation with 54598

Event between (54598) Bienor and star GA1340:02565141 with event index number of 311046

Geocentric closest approach at 2020/10/18 08:16:18 UTC

J2000 position of star is 04:56:42.0 +44:18:49
Equinox of date position of star is 04:58:09.3 +44:20:38
Stellar brightness G=15.7, use SENSEUP=128
Star is 141 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 14.3 AU from the Sun and 13.7 AU from the Earth.
The TNO is moving 13.0 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 592 km.
The sky-plane scale is 9911.8 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=190.6 km assuming a 5% albedo -- 4.6 sec chord
Diameter=77.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2020/10/18 08:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.0 +16:32:58  0.8 28.15 157
3Iot Aur       04:58:21.1 +33:11:50  2.7 11.15 148
PPM 047482     04:56:21.0 +44:05:34  6.0  0.42 142
PPM 047546     04:59:59.4 +44:27:44  8.9  0.34 141
PPM 047516     04:57:51.7 +44:30:05 10.5  0.17 141
54598          04:58:12.1 +44:20:42 15.7       141
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 24.3 km RECON observability=1.0 and success probability=26.0%
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 08:20:10 -48.8 Dark Down 61.8 86.1 Up 08:15:07 - 08:25:12 -535
Kelowna 08:20:10 -49.2 Dark Down 61.7 85.2 Up 08:15:08 - 08:25:13 -578
Peachland 08:20:12 -49.4 Dark Down 61.5 84.8 Up 08:15:09 - 08:25:14 -591
Summerland 08:20:11 -49.5 Dark Down 61.6 84.6 Up 08:15:08 - 08:25:13 -607
Penticton 08:20:11 -49.6 Dark Down 61.6 84.6 Up 08:15:08 - 08:25:13 -615
Oliver 08:20:11 -49.9 Dark Down 61.6 83.9 Up 08:15:08 - 08:25:13 -654
Anarchist Mountain Observatory 08:20:10 -50.0 Dark Down 61.7 83.7 Up 08:15:07 - 08:25:12 -673
Tonasket 08:20:10 -50.3 Dark Down 61.6 83.1 Up 08:15:07 - 08:25:12 -707
Victoria 08:20:29 -51.0 Dark Down 59.0 80.5 Up 08:15:26 - 08:25:31 -721
Okanogan 08:20:11 -50.7 Dark Down 61.5 82.4 Up 08:15:08 - 08:25:13 -744
Brewster 08:20:11 -51.0 Dark Down 61.3 81.8 Up 08:15:09 - 08:25:14 -774
Manson/Chelan 08:20:13 -51.3 Dark Down 61.0 81.2 Up 08:15:11 - 08:25:16 -798
Entiat 08:20:14 -51.5 Dark Down 60.9 80.8 Up 08:15:11 - 08:25:16 -822
Wenatchee 08:20:14 -51.7 Dark Down 60.8 80.3 Up 08:15:11 - 08:25:16 -850
Ellensburg 08:20:15 -52.2 Dark Down 60.6 79.4 Up 08:15:13 - 08:25:18 -896
Yakima 08:20:15 -52.6 Dark Down 60.5 78.7 Up 08:15:12 - 08:25:17 -941
Toppenish/White Swan 08:20:14 -52.8 Dark Down 60.6 78.4 Up 08:15:11 - 08:25:16 -965
Pasco 08:20:07 -52.7 Dark Down 61.4 78.8 Up 08:15:05 - 08:25:10 -978
PNWRO 08:20:06 -52.9 Dark Down 61.5 78.5 Up 08:15:03 - 08:25:08 -1005
Goldendale 08:20:16 -53.4 Dark Down 60.2 77.3 Up 08:15:13 - 08:25:18 -1025
The Dalles 08:20:17 -53.6 Dark Down 59.9 76.7 Up 08:15:15 - 08:25:20 -1049
Maupin 08:20:17 -54.0 Dark Down 59.9 76.1 Up 08:15:15 - 08:25:20 -1096
Sisters 08:20:19 -55.0 Dark Down 59.3 74.4 Up 08:15:16 - 08:25:21 -1192
Redmond 08:20:17 -54.9 Dark Down 59.6 74.6 Up 08:15:15 - 08:25:20 -1195
Bend 08:20:18 -55.2 Dark Down 59.4 74.1 Up 08:15:15 - 08:25:20 -1219
Oregon Observatory 08:20:18 -55.3 Dark Down 59.3 73.8 Up 08:15:16 - 08:25:21 -1238
La Pine/Gilchrist 08:20:18 -55.6 Dark Down 59.2 73.5 Up 08:15:16 - 08:25:21 -1260
North Lake 08:20:15 -55.9 Dark Down 59.5 73.0 Up 08:15:12 - 08:25:17 -1309
Paisley 08:20:13 -56.4 Dark Down 59.6 72.2 Up 08:15:10 - 08:25:15 -1369
Klamath Falls 08:20:19 -57.0 Dark Down 58.6 71.1 Up 08:15:17 - 08:25:22 -1419
Lakeview 08:20:11 -56.8 Dark Down 59.5 71.4 Up 08:15:09 - 08:25:14 -1425
Cedarville 08:20:10 -57.4 Dark Down 59.4 70.4 Up 08:15:08 - 08:25:13 -1497
Niwot 08:18:43 -53.4 Dark Down 69.4 69.2 Up 08:13:40 - 08:23:45 -1533
SwRI 08:18:43 -53.5 Dark Down 69.3 69.0 Up 08:13:40 - 08:23:45 -1545
Fall River/Burney 08:20:16 -58.1 Dark Down 58.4 69.4 Up 08:15:14 - 08:25:19 -1548
Susanville 08:20:12 -58.6 Dark Down 58.7 68.6 Up 08:15:10 - 08:25:15 -1617
Greenville 08:20:13 -58.9 Dark Down 58.4 68.1 Up 08:15:11 - 08:25:16 -1647
Gimple 08:20:13 -58.9 Dark Down 58.5 68.1 Up 08:15:10 - 08:25:15 -1647
Quincy 08:20:13 -59.1 Dark Down 58.3 67.8 Up 08:15:10 - 08:25:15 -1669
Portola 08:20:10 -59.1 Dark Down 58.6 67.7 Up 08:15:08 - 08:25:13 -1683
Reno 08:20:07 -59.2 Dark Down 59.0 67.4 Up 08:15:04 - 08:25:09 -1712
Carson City 08:20:06 -59.6 Dark Down 58.8 66.8 Up 08:15:03 - 08:25:08 -1751
Yerington 08:20:02 -59.6 Dark Down 59.2 66.6 Up 08:15:00 - 08:25:05 -1772
Gardnerville 08:20:06 -59.8 Dark Down 58.8 66.4 Up 08:15:03 - 08:25:08 -1777
Hawthorne 08:19:58 -59.9 Dark Down 59.4 65.9 Up 08:14:56 - 08:25:01 -1821
Tonopah 08:19:50 -59.9 Dark Down 60.2 65.3 Up 08:14:47 - 08:24:52 -1869
Lee Vining 08:20:01 -60.6 Dark Down 58.8 65.0 Up 08:14:58 - 08:25:03 -1883
Bishop 08:19:56 -60.9 Dark Down 59.1 64.2 Up 08:14:53 - 08:24:58 -1946
Beatty 08:19:46 -60.9 Dark Down 60.0 63.5 Up 08:14:43 - 08:24:48 -1991
Indian Springs 08:19:39 -60.8 Dark Down 60.6 62.9 Up 08:14:36 - 08:24:41 -2022
Henderson 08:19:34 -61.0 Dark Down 60.8 62.0 Up 08:14:31 - 08:24:36 -2075
Patrick 08:19:26 -61.1 Dark Down 61.3 60.9 Up 08:14:24 - 08:24:29 -2134
Searchlight/Boulder City 08:19:33 -61.5 Dark Down 60.6 61.1 Up 08:14:30 - 08:24:35 -2135
Kingman/Dolan Springs 08:19:27 -61.4 Dark Down 61.1 60.6 Up 08:14:24 - 08:24:29 -2159
DCO 08:19:22 -61.1 Dark Down 61.7 60.3 Up 08:14:19 - 08:24:24 -2161
Laughlin/Bullhead City 08:19:30 -61.6 Dark Down 60.7 60.6 Up 08:14:28 - 08:24:33 -2164
CPSLO 08:20:07 -63.5 Dark Down 56.5 61.2 Up 08:15:04 - 08:25:09 -2165
Mohave Valley 08:19:29 -61.8 Dark Down 60.6 60.2 Up 08:14:27 - 08:24:32 -2193
Lake Havasu City 08:19:27 -62.1 Dark Down 60.5 59.5 Up 08:14:25 - 08:24:30 -2234
Parker 08:19:27 -62.4 Dark Down 60.4 59.0 Up 08:14:24 - 08:24:29 -2271
Wildwood 08:19:53 -64.0 Dark Down 57.4 59.5 Up 08:14:50 - 08:24:55 -2293
George/Scottsdale 08:19:11 -61.6 Dark Down 61.8 57.8 Up 08:14:08 - 08:24:13 -2296
Idyllwild 08:19:41 -63.7 Dark Down 58.5 58.8 Up 08:14:38 - 08:24:43 -2326
Blythe 08:19:29 -62.9 Dark Down 59.9 58.3 Up 08:14:27 - 08:24:32 -2328
Calipatria 08:19:33 -63.8 Dark Down 59.0 57.8 Up 08:14:30 - 08:24:35 -2384
Yuma 08:19:26 -63.8 Dark Down 59.4 57.0 Up 08:14:24 - 08:24:29 -2424

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, (2020/10/18 08:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 28.15 157
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.15 148
PPM 047482     04:54:51.2 +44:03:38  6.0  0.42 142
PPM 047546     04:58:29.1 +44:25:54  8.9  0.34 141
PPM 047516     04:56:21.5 +44:28:12 10.5  0.17 141
54598          04:56:42.0 +44:18:49 15.7       141
Positions are for J2000

Event circumstances last updated at 2020/02/24 21:40:54 UT

Marc W. Buie, Southwest Research Institute

RECON