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 12:20:11 UTC

J2000 position of star is 04:55:40.4 +44:24:33
Equinox of date position of star is 04:57:03.0 +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 51 seconds.
The 1-sigma cross-track error in the shadow position is 565 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=55.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 12:18:48 -22.5 Dark Down 72.4 261.4 Up 12:14:02 - 12:23:34 355
Summerland 12:18:49 -22.7 Dark Down 72.6 261.1 Up 12:14:03 - 12:23:35 335
Niwot 12:17:09 -12.9 AT Down 61.4 291.5 Up 12:12:23 - 12:21:55 325
Penticton 12:18:47 -22.6 Dark Down 72.5 262.3 Up 12:14:01 - 12:23:33 317
Okanagan Falls 12:18:46 -22.7 Dark Down 72.6 262.9 Up 12:14:00 - 12:23:32 300
Oliver 12:18:45 -22.7 Dark Down 72.6 263.4 Up 12:13:59 - 12:23:31 288
Anarchist Mountain Observatory 12:18:44 -22.6 Dark Down 72.5 264.2 Up 12:13:58 - 12:23:30 282
Oroville 12:18:44 -22.6 Dark Down 72.6 264.3 Up 12:13:58 - 12:23:30 272
Tonasket 12:18:42 -22.7 Dark Down 72.6 265.1 Up 12:13:56 - 12:23:28 253
Okanogan 12:18:42 -22.8 Dark Down 72.7 266.0 Up 12:13:56 - 12:23:28 218
Brewster 12:18:41 -23.0 Dark Down 72.9 266.7 Up 12:13:55 - 12:23:27 186
Manson/Chelan 12:18:41 -23.3 Dark Down 73.1 267.0 Up 12:13:55 - 12:23:27 151
Entiat 12:18:40 -23.3 Dark Down 73.2 267.7 Up 12:13:54 - 12:23:26 129
Wenatchee 12:18:40 -23.4 Dark Down 73.2 268.5 Up 12:13:54 - 12:23:26 103
Pasco 12:18:29 -22.8 Dark Down 72.4 273.0 Up 12:13:43 - 12:23:15 61
Ellensburg 12:18:38 -23.7 Dark Down 73.4 269.7 Up 12:13:52 - 12:23:24 57
PNWRO 12:18:27 -22.7 Dark Down 72.3 273.9 Up 12:13:41 - 12:23:13 51
George/Umatilla 12:18:29 -23.0 Dark Down 72.6 274.0 Up 12:13:43 - 12:23:15 22
Yakima 12:18:36 -23.7 Dark Down 73.4 271.0 Up 12:13:50 - 12:23:22 21
Toppenish/White Swan 12:18:35 -23.6 Dark Down 73.3 271.9 Up 12:13:49 - 12:23:21 11
Goldendale 12:18:34 -24.0 Dark Down 73.6 273.5 Up 12:13:48 - 12:23:20 -57
The Dalles 12:18:34 -24.3 Dark Down 73.8 274.0 Up 12:13:48 - 12:23:20 -94
Maupin 12:18:32 -24.3 Dark Down 73.7 275.5 Up 12:13:46 - 12:23:18 -125
Madras/Culver 12:18:30 -24.4 Dark Down 73.7 277.3 Up 12:13:44 - 12:23:16 -174
Redmond 12:18:28 -24.5 Dark Down 73.7 278.5 Up 12:13:42 - 12:23:14 -208
Sisters 12:18:30 -24.7 Dark Down 74.0 278.3 Up 12:13:44 - 12:23:16 -225
Bend 12:18:28 -24.6 Dark Down 73.8 279.2 Up 12:13:42 - 12:23:14 -234
Oregon Observatory 12:18:27 -24.7 Dark Down 73.8 279.8 Up 12:13:41 - 12:23:13 -255
La Pine/Gilchrist 12:18:26 -24.8 Dark Down 73.8 280.4 Up 12:13:40 - 12:23:12 -276
North Lake 12:18:22 -24.4 Dark Down 73.3 282.0 Up 12:13:36 - 12:23:08 -284
Paisley 12:18:18 -24.2 Dark Down 73.0 283.8 Up 12:13:32 - 12:23:04 -314
Lakeview 12:18:15 -24.1 Dark Down 72.7 285.4 Up 12:13:29 - 12:23:01 -349
Chiloquin 12:18:23 -25.2 Dark Down 73.9 284.1 Up 12:13:37 - 12:23:09 -391
Cedarville 12:18:11 -24.1 Dark Down 72.4 287.4 Up 12:13:25 - 12:22:57 -397
Klamath Falls 12:18:21 -25.2 Dark Down 73.7 285.3 Up 12:13:35 - 12:23:07 -417
Tulelake 12:18:18 -25.0 Dark Down 73.4 286.1 Up 12:13:32 - 12:23:04 -426
Fall River/Burney 12:18:14 -25.0 Dark Down 73.1 289.0 Up 12:13:28 - 12:23:00 -502
Susanville 12:18:08 -24.6 Dark Down 72.4 290.8 Up 12:13:22 - 12:22:54 -519
Tonopah 12:17:43 -22.1 Dark Down 69.1 296.2 Up 12:12:57 - 12:22:29 -538
Reno 12:18:01 -24.0 Dark Down 71.5 293.1 Up 12:13:15 - 12:22:47 -551
DCO 12:17:13 -19.0 Dark Down 64.9 301.0 Up 12:12:27 - 12:21:59 -552
Gimple 12:18:08 -24.7 Dark Down 72.4 291.7 Up 12:13:22 - 12:22:54 -554
Greenville 12:18:08 -24.8 Dark Down 72.5 291.7 Up 12:13:22 - 12:22:54 -558
Portola 12:18:05 -24.5 Dark Down 72.0 292.5 Up 12:13:19 - 12:22:51 -562
Yerington 12:17:55 -23.6 Dark Down 70.8 294.4 Up 12:13:09 - 12:22:41 -564
Patrick 12:17:17 -19.5 Dark Down 65.5 300.7 Up 12:12:31 - 12:22:03 -569
Hawthorne 12:17:51 -23.2 Dark Down 70.3 295.4 Up 12:13:05 - 12:22:37 -576
Quincy 12:18:07 -24.8 Dark Down 72.4 292.3 Up 12:13:21 - 12:22:53 -576
Indian Springs 12:17:30 -21.0 Dark Down 67.3 299.0 Up 12:12:44 - 12:22:16 -578
Carson City 12:17:59 -24.0 Dark Down 71.3 294.1 Up 12:13:13 - 12:22:45 -581
Henderson 12:17:25 -20.4 Dark Down 66.6 299.9 Up 12:12:39 - 12:22:11 -582
Kingman/Dolan Springs 12:17:17 -19.7 Dark Down 65.6 301.2 Up 12:12:31 - 12:22:03 -599
Gardnerville 12:17:58 -24.0 Dark Down 71.2 294.7 Up 12:13:12 - 12:22:44 -600
Beatty 12:17:36 -21.8 Dark Down 68.2 298.6 Up 12:12:50 - 12:22:22 -611
Searchlight/Boulder City 12:17:21 -20.4 Dark Down 66.3 301.0 Up 12:12:35 - 12:22:07 -627
Laughlin/Bullhead City 12:17:19 -20.1 Dark Down 65.9 301.4 Up 12:12:33 - 12:22:05 -632
Lee Vining 12:17:51 -23.6 Dark Down 70.4 297.0 Up 12:13:05 - 12:22:37 -651
Mohave Valley 12:17:17 -20.1 Dark Down 65.8 301.9 Up 12:12:31 - 12:22:03 -654
Bishop 12:17:45 -23.1 Dark Down 69.6 298.2 Up 12:12:59 - 12:22:31 -663
Lake Havasu City 12:17:15 -19.9 Dark Down 65.4 302.6 Up 12:12:29 - 12:22:01 -673
Parker 12:17:13 -19.9 Dark Down 65.2 303.2 Up 12:12:27 - 12:21:59 -701
Lone Pine 12:17:40 -22.9 Dark Down 69.0 299.8 Up 12:12:54 - 12:22:26 -711
Blythe 12:17:12 -20.1 Dark Down 65.1 304.3 Up 12:12:26 - 12:21:58 -763
Yuma 12:17:08 -20.1 Dark Down 64.6 305.9 Up 12:12:22 - 12:21:54 -843
Calipatria 12:17:13 -20.9 Dark Down 65.4 305.6 Up 12:12:27 - 12:21:59 -861
Idyllwild 12:17:22 -21.9 Dark Down 66.6 305.1 Up 12:12:36 - 12:22:08 -880
Wildwood 12:17:32 -23.4 Dark Down 68.0 305.5 Up 12:12:46 - 12:22:18 -958
CPSLO 12:17:46 -25.0 Dark Down 70.1 304.2 Up 12:13:00 - 12:22:32 -968

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 2019/01/18 19:59:13 UT

Marc W. Buie, Southwest Research Institute

RECON