RECON: TNO occultation with 54598

Event between (54598) Bienor and star GA1340:02547373 with event index number of 363547

Geocentric closest approach at 2020/10/24 12:19:45 UTC

J2000 position of star is 04:55:40.4 +44:24:33
Equinox of date position of star is 04:57:03.6 +44:26:18
Stellar brightness G=11.9, use SENSEUP=16
Star is 124 degrees from the moon. Moon is 60% illuminated.
TNO apparent brightness V=19.2

[RECON map]
TNO is 14.2 AU from the Sun and 13.6 AU from the Earth.
The TNO is moving 14.6 km/sec on the sky relative to the star, or, 5.3 arcsec/hr.
The 1-sigma error in the time of the event is 46 seconds.
The 1-sigma cross-track error in the shadow position is 536 km.
The sky-plane scale is 9855.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 13.0 sec chord
Diameter=77.8 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2020/10/24 12:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.0 +16:32:58  0.8 28.21 116
3Iot Aur       04:58:21.1 +33:11:50  2.7 11.25 124
PPM 047482     04:56:21.1 +44:05:34  6.0  0.38 124
PPM 047525     04:58:27.2 +44:41:06  9.4  0.33 124
PPM 047516     04:57:51.8 +44:30:05 10.5  0.14 124
54598          04:57:10.6 +44:26:27 11.9       124
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 16.8 km RECON observability=1.0 and success probability=57.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 12:18:21 -22.5 Dark Down 72.5 261.3 Up 12:14:01 - 12:22:41 999
Niwot 12:16:42 -13.0 AT Down 61.5 291.5 Up 12:12:22 - 12:21:02 967
Summerland 12:18:21 -22.8 Dark Down 72.7 261.9 Up 12:14:01 - 12:22:41 962
Penticton 12:18:21 -22.7 Dark Down 72.6 262.2 Up 12:14:01 - 12:22:41 961
SwRI 12:16:42 -13.1 AT Down 61.5 291.6 Up 12:12:22 - 12:21:02 954
Okanagan Falls 12:18:20 -22.7 Dark Down 72.7 262.8 Up 12:14:00 - 12:22:40 944
Oliver 12:18:19 -22.7 Dark Down 72.7 263.3 Up 12:13:59 - 12:22:39 932
Anarchist Mountain Observatory 12:18:17 -22.7 Dark Down 72.6 264.1 Up 12:13:57 - 12:22:37 926
Oroville 12:18:17 -22.7 Dark Down 72.6 264.2 Up 12:13:57 - 12:22:37 916
Tonasket 12:18:16 -22.7 Dark Down 72.6 265.0 Up 12:13:56 - 12:22:36 897
Okanogan 12:18:15 -22.9 Dark Down 72.8 265.9 Up 12:13:55 - 12:22:35 862
Brewster 12:18:14 -23.1 Dark Down 72.9 266.6 Up 12:13:54 - 12:22:34 830
Manson/Chelan 12:18:15 -23.3 Dark Down 73.2 267.0 Up 12:13:55 - 12:22:35 795
Entiat 12:18:14 -23.4 Dark Down 73.2 267.6 Up 12:13:54 - 12:22:34 773
Wenatchee 12:18:13 -23.5 Dark Down 73.3 268.4 Up 12:13:53 - 12:22:33 747
Pasco 12:18:03 -22.9 Dark Down 72.5 273.0 Up 12:13:43 - 12:22:23 705
Ellensburg 12:18:12 -23.7 Dark Down 73.5 269.6 Up 12:13:52 - 12:22:32 701
PNWRO 12:18:01 -22.7 Dark Down 72.3 273.9 Up 12:13:41 - 12:22:21 695
George/Umatilla 12:18:02 -23.1 Dark Down 72.6 273.9 Up 12:13:42 - 12:22:22 666
Yakima 12:18:10 -23.8 Dark Down 73.5 271.0 Up 12:13:50 - 12:22:30 665
Toppenish/White Swan 12:18:09 -23.7 Dark Down 73.4 271.8 Up 12:13:49 - 12:22:29 655
Goldendale 12:18:08 -24.1 Dark Down 73.7 273.4 Up 12:13:48 - 12:22:28 587
The Dalles 12:18:08 -24.4 Dark Down 73.9 274.0 Up 12:13:48 - 12:22:28 550
Maupin 12:18:05 -24.4 Dark Down 73.8 275.4 Up 12:13:45 - 12:22:25 519
Madras/Culver 12:18:03 -24.5 Dark Down 73.8 277.3 Up 12:13:43 - 12:22:23 469
Redmond 12:18:01 -24.5 Dark Down 73.8 278.5 Up 12:13:41 - 12:22:21 436
Sisters 12:18:04 -24.8 Dark Down 74.0 278.3 Up 12:13:44 - 12:22:24 419
Bend 12:18:01 -24.7 Dark Down 73.8 279.2 Up 12:13:41 - 12:22:21 410
Oregon Observatory 12:18:01 -24.8 Dark Down 73.9 279.7 Up 12:13:41 - 12:22:21 389
La Pine/Gilchrist 12:18:00 -24.9 Dark Down 73.9 280.4 Up 12:13:40 - 12:22:20 368
North Lake 12:17:56 -24.5 Dark Down 73.4 282.0 Up 12:13:36 - 12:22:16 360
Paisley 12:17:52 -24.3 Dark Down 73.0 283.8 Up 12:13:32 - 12:22:12 329
Lakeview 12:17:49 -24.2 Dark Down 72.8 285.4 Up 12:13:29 - 12:22:09 295
Chiloquin 12:17:57 -25.3 Dark Down 73.9 284.1 Up 12:13:37 - 12:22:17 253
Cedarville 12:17:45 -24.2 Dark Down 72.5 287.4 Up 12:13:25 - 12:22:05 247
Klamath Falls 12:17:55 -25.3 Dark Down 73.8 285.3 Up 12:13:35 - 12:22:15 227
Tulelake 12:17:52 -25.1 Dark Down 73.5 286.2 Up 12:13:32 - 12:22:12 218
Fall River/Burney 12:17:48 -25.1 Dark Down 73.2 289.0 Up 12:13:28 - 12:22:08 142
Susanville 12:17:42 -24.6 Dark Down 72.5 290.8 Up 12:13:22 - 12:22:02 125
Tonopah 12:17:17 -22.2 Dark Down 69.2 296.2 Up 12:12:57 - 12:21:37 105
Reno 12:17:34 -24.1 Dark Down 71.6 293.1 Up 12:13:14 - 12:21:54 92
DCO 12:16:46 -19.1 Dark Down 65.0 301.1 Up 12:12:26 - 12:21:06 90
Gimple 12:17:42 -24.8 Dark Down 72.5 291.7 Up 12:13:22 - 12:22:02 89
Greenville 12:17:42 -24.9 Dark Down 72.6 291.7 Up 12:13:22 - 12:22:02 85
Portola 12:17:38 -24.6 Dark Down 72.1 292.6 Up 12:13:18 - 12:21:58 81
Yerington 12:17:29 -23.6 Dark Down 70.9 294.4 Up 12:13:09 - 12:21:49 79
Patrick 12:16:50 -19.6 Dark Down 65.6 300.7 Up 12:12:30 - 12:21:10 73
Quincy 12:17:41 -24.9 Dark Down 72.5 292.3 Up 12:13:21 - 12:22:01 68
Hawthorne 12:17:25 -23.3 Dark Down 70.3 295.5 Up 12:13:05 - 12:21:45 67
Indian Springs 12:17:03 -21.1 Dark Down 67.4 299.0 Up 12:12:43 - 12:21:23 65
Carson City 12:17:33 -24.1 Dark Down 71.4 294.1 Up 12:13:13 - 12:21:53 62
Henderson 12:16:58 -20.5 Dark Down 66.7 299.9 Up 12:12:38 - 12:21:18 60
Kingman/Dolan Springs 12:16:50 -19.8 Dark Down 65.6 301.2 Up 12:12:30 - 12:21:10 44
Gardnerville 12:17:31 -24.1 Dark Down 71.3 294.7 Up 12:13:11 - 12:21:51 43
Beatty 12:17:09 -21.9 Dark Down 68.3 298.7 Up 12:12:49 - 12:21:29 31
Searchlight/Boulder City 12:16:55 -20.5 Dark Down 66.4 301.0 Up 12:12:35 - 12:21:15 16
Laughlin/Bullhead City 12:16:52 -20.2 Dark Down 66.0 301.5 Up 12:12:32 - 12:21:12 11
Lee Vining 12:17:24 -23.7 Dark Down 70.4 297.1 Up 12:13:04 - 12:21:44 -8
Mohave Valley 12:16:51 -20.2 Dark Down 65.8 302.0 Up 12:12:31 - 12:21:11 -12
Bishop 12:17:18 -23.2 Dark Down 69.7 298.2 Up 12:12:58 - 12:21:38 -20
Lake Havasu City 12:16:48 -20.0 Dark Down 65.5 302.6 Up 12:12:28 - 12:21:08 -31
Parker 12:16:46 -20.0 Dark Down 65.2 303.3 Up 12:12:26 - 12:21:06 -58
Lone Pine 12:17:13 -22.9 Dark Down 69.1 299.9 Up 12:12:53 - 12:21:33 -68
Blythe 12:16:45 -20.2 Dark Down 65.2 304.3 Up 12:12:25 - 12:21:05 -121
Yuma 12:16:41 -20.2 Dark Down 64.7 306.0 Up 12:12:21 - 12:21:01 -201
Calipatria 12:16:47 -21.0 Dark Down 65.5 305.7 Up 12:12:27 - 12:21:07 -218
Idyllwild 12:16:55 -22.0 Dark Down 66.7 305.2 Up 12:12:35 - 12:21:15 -237
Wildwood 12:17:05 -23.5 Dark Down 68.1 305.6 Up 12:12:45 - 12:21:25 -316
CPSLO 12:17:19 -25.1 Dark Down 70.2 304.3 Up 12:12:59 - 12:21:39 -325

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, (2020/10/24 12:20UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 28.21 116
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.25 124
PPM 047482     04:54:51.2 +44:03:38  6.0  0.38 124
PPM 047525     04:56:56.7 +44:39:14  9.4  0.33 124
PPM 047516     04:56:21.5 +44:28:12 10.5  0.14 124
54598          04:55:40.4 +44:24:33 11.9       124
Positions are for J2000

Event circumstances last updated at 2019/03/13 21:56:16 UT

Marc W. Buie, Southwest Research Institute

RECON