RECON: TNO occultation with 54598

Event between (54598) Bienor and star GA1340:02565141 with event index number of 361374

Geocentric closest approach at 2020/10/18 08:16:19 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 593 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=25.5%
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 08:20:11 -48.8 Dark Down 61.8 86.1 Up 08:15:08 - 08:25:13 -547
Kelowna 08:20:11 -49.2 Dark Down 61.7 85.2 Up 08:15:09 - 08:25:14 -590
Peachland 08:20:13 -49.4 Dark Down 61.5 84.8 Up 08:15:10 - 08:25:15 -602
Summerland 08:20:12 -49.5 Dark Down 61.6 84.6 Up 08:15:10 - 08:25:15 -619
Penticton 08:20:12 -49.6 Dark Down 61.6 84.6 Up 08:15:09 - 08:25:14 -626
Oliver 08:20:12 -49.9 Dark Down 61.6 83.9 Up 08:15:09 - 08:25:14 -665
Anarchist Mountain Observatory 08:20:11 -50.0 Dark Down 61.7 83.7 Up 08:15:08 - 08:25:13 -685
Tonasket 08:20:11 -50.3 Dark Down 61.6 83.1 Up 08:15:09 - 08:25:14 -719
Victoria 08:20:30 -51.0 Dark Down 59.0 80.5 Up 08:15:28 - 08:25:33 -732
Okanogan 08:20:11 -50.7 Dark Down 61.5 82.4 Up 08:15:09 - 08:25:14 -756
Brewster 08:20:12 -51.0 Dark Down 61.3 81.8 Up 08:15:10 - 08:25:15 -786
Manson/Chelan 08:20:14 -51.3 Dark Down 61.0 81.2 Up 08:15:12 - 08:25:17 -809
Entiat 08:20:14 -51.5 Dark Down 61.0 80.8 Up 08:15:12 - 08:25:17 -833
Wenatchee 08:20:15 -51.7 Dark Down 60.8 80.3 Up 08:15:12 - 08:25:17 -862
Ellensburg 08:20:16 -52.2 Dark Down 60.6 79.4 Up 08:15:14 - 08:25:19 -907
Yakima 08:20:16 -52.6 Dark Down 60.5 78.7 Up 08:15:13 - 08:25:18 -952
Toppenish/White Swan 08:20:15 -52.8 Dark Down 60.6 78.4 Up 08:15:12 - 08:25:17 -976
Pasco 08:20:08 -52.7 Dark Down 61.4 78.8 Up 08:15:06 - 08:25:11 -990
PNWRO 08:20:07 -52.9 Dark Down 61.5 78.5 Up 08:15:05 - 08:25:10 -1017
Goldendale 08:20:17 -53.4 Dark Down 60.2 77.3 Up 08:15:14 - 08:25:19 -1037
The Dalles 08:20:18 -53.6 Dark Down 59.9 76.7 Up 08:15:16 - 08:25:21 -1061
Maupin 08:20:18 -54.0 Dark Down 59.9 76.1 Up 08:15:16 - 08:25:21 -1107
Sisters 08:20:20 -55.0 Dark Down 59.3 74.4 Up 08:15:17 - 08:25:22 -1204
Redmond 08:20:17 -54.9 Dark Down 59.6 74.6 Up 08:15:15 - 08:25:20 -1207
Bend 08:20:19 -55.2 Dark Down 59.4 74.1 Up 08:15:16 - 08:25:21 -1230
Oregon Observatory 08:20:19 -55.3 Dark Down 59.3 73.8 Up 08:15:17 - 08:25:22 -1249
La Pine/Gilchrist 08:20:19 -55.6 Dark Down 59.2 73.5 Up 08:15:17 - 08:25:22 -1272
North Lake 08:20:16 -55.9 Dark Down 59.5 73.0 Up 08:15:13 - 08:25:18 -1320
Paisley 08:20:13 -56.4 Dark Down 59.6 72.2 Up 08:15:10 - 08:25:15 -1381
Klamath Falls 08:20:20 -57.0 Dark Down 58.6 71.1 Up 08:15:18 - 08:25:23 -1430
Lakeview 08:20:13 -56.8 Dark Down 59.5 71.4 Up 08:15:10 - 08:25:15 -1437
Cedarville 08:20:11 -57.4 Dark Down 59.4 70.4 Up 08:15:09 - 08:25:14 -1508
Niwot 08:18:44 -53.4 Dark Down 69.4 69.2 Up 08:13:41 - 08:23:46 -1544
SwRI 08:18:44 -53.5 Dark Down 69.3 69.0 Up 08:13:41 - 08:23:46 -1557
Fall River/Burney 08:20:17 -58.1 Dark Down 58.4 69.4 Up 08:15:15 - 08:25:20 -1559
Susanville 08:20:13 -58.6 Dark Down 58.7 68.6 Up 08:15:10 - 08:25:15 -1629
Greenville 08:20:14 -58.9 Dark Down 58.4 68.1 Up 08:15:11 - 08:25:16 -1659
Gimple 08:20:14 -58.9 Dark Down 58.5 68.1 Up 08:15:11 - 08:25:16 -1659
Quincy 08:20:14 -59.1 Dark Down 58.3 67.8 Up 08:15:11 - 08:25:16 -1681
Portola 08:20:11 -59.1 Dark Down 58.6 67.7 Up 08:15:08 - 08:25:13 -1695
Reno 08:20:07 -59.2 Dark Down 59.0 67.4 Up 08:15:05 - 08:25:10 -1724
Carson City 08:20:07 -59.6 Dark Down 58.8 66.8 Up 08:15:04 - 08:25:09 -1763
Yerington 08:20:03 -59.6 Dark Down 59.2 66.6 Up 08:15:01 - 08:25:06 -1783
Gardnerville 08:20:06 -59.8 Dark Down 58.8 66.4 Up 08:15:04 - 08:25:09 -1789
Hawthorne 08:19:59 -59.9 Dark Down 59.4 65.9 Up 08:14:57 - 08:25:02 -1833
Tonopah 08:19:51 -59.9 Dark Down 60.2 65.3 Up 08:14:48 - 08:24:53 -1881
Lee Vining 08:20:02 -60.6 Dark Down 58.8 65.0 Up 08:14:59 - 08:25:04 -1894
Bishop 08:19:57 -60.9 Dark Down 59.1 64.2 Up 08:14:54 - 08:24:59 -1957
Beatty 08:19:46 -60.9 Dark Down 60.0 63.5 Up 08:14:44 - 08:24:49 -2003
Indian Springs 08:19:39 -60.8 Dark Down 60.6 62.9 Up 08:14:37 - 08:24:42 -2033
Henderson 08:19:35 -61.0 Dark Down 60.8 62.0 Up 08:14:32 - 08:24:37 -2086
Patrick 08:19:27 -61.1 Dark Down 61.3 60.9 Up 08:14:25 - 08:24:30 -2146
Searchlight/Boulder City 08:19:34 -61.5 Dark Down 60.6 61.1 Up 08:14:31 - 08:24:36 -2147
Kingman/Dolan Springs 08:19:28 -61.4 Dark Down 61.1 60.6 Up 08:14:26 - 08:24:31 -2171
DCO 08:19:22 -61.1 Dark Down 61.7 60.3 Up 08:14:19 - 08:24:24 -2173
Laughlin/Bullhead City 08:19:31 -61.6 Dark Down 60.7 60.6 Up 08:14:29 - 08:24:34 -2176
CPSLO 08:20:07 -63.5 Dark Down 56.5 61.2 Up 08:15:05 - 08:25:10 -2177
Mohave Valley 08:19:30 -61.8 Dark Down 60.6 60.2 Up 08:14:28 - 08:24:33 -2205
Lake Havasu City 08:19:28 -62.1 Dark Down 60.5 59.5 Up 08:14:26 - 08:24:31 -2245
Parker 08:19:28 -62.4 Dark Down 60.4 59.0 Up 08:14:25 - 08:24:30 -2282
Wildwood 08:19:54 -64.0 Dark Down 57.4 59.5 Up 08:14:51 - 08:24:56 -2305
George/Scottsdale 08:19:12 -61.6 Dark Down 61.8 57.8 Up 08:14:09 - 08:24:14 -2307
Idyllwild 08:19:42 -63.7 Dark Down 58.5 58.8 Up 08:14:39 - 08:24:44 -2338
Blythe 08:19:28 -62.9 Dark Down 59.9 58.3 Up 08:14:26 - 08:24:31 -2339
Calipatria 08:19:33 -63.8 Dark Down 59.0 57.8 Up 08:14:31 - 08:24:36 -2396
Yuma 08:19:27 -63.8 Dark Down 59.4 57.0 Up 08:14:25 - 08:24:30 -2436

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 21:39:59 UT

Marc W. Buie, Southwest Research Institute

RECON