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 05:35:56 UTC

J2000 position of star is 03:29:16.7 +41:41:30
Equinox of date position of star is 03:30:29.5 +41:45:12
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 35 seconds.
The 1-sigma cross-track error in the shadow position is 580 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 23.3 km RECON observability=1.0 and success probability=0.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:36:55 -52.2 Dark Up 72.7 106.3 Up 05:33:29 - 05:40:21 3885
Tonasket 05:36:56 -52.3 Dark Up 72.8 105.6 Up 05:33:30 - 05:40:22 3863
Okanogan 05:36:57 -52.4 Dark Up 72.8 104.4 Up 05:33:31 - 05:40:23 3837
Brewster 05:36:59 -52.5 Dark Up 72.7 103.3 Up 05:33:33 - 05:40:25 3819
Manson/Chelan 05:37:00 -52.4 Dark Up 72.5 102.2 Up 05:33:34 - 05:40:26 3813
Entiat 05:37:01 -52.5 Dark Up 72.5 101.4 Up 05:33:35 - 05:40:27 3795
Wenatchee 05:37:02 -52.6 Dark Up 72.5 100.5 Up 05:33:36 - 05:40:28 3775
Ellensburg 05:37:04 -52.7 Dark Up 72.5 99.0 Up 05:33:38 - 05:40:30 3745
Yakima 05:37:05 -52.9 Dark Up 72.5 97.7 Up 05:33:39 - 05:40:31 3708
Toppenish/White Swan 05:37:05 -53.1 Dark Up 72.7 97.2 Up 05:33:39 - 05:40:31 3681
Goldendale 05:37:08 -53.1 Dark Up 72.4 95.1 Up 05:33:42 - 05:40:34 3646
The Dalles 05:37:09 -53.0 Dark Up 72.2 94.0 Up 05:33:43 - 05:40:35 3639
Pasco 05:37:02 -53.9 Dark Up 73.5 98.1 Up 05:33:36 - 05:40:28 3621
George/Umatilla 05:37:03 -53.9 Dark Up 73.4 96.8 Up 05:33:37 - 05:40:29 3597
Maupin 05:37:10 -53.3 Dark Up 72.3 92.8 Up 05:33:44 - 05:40:36 3596
PNWRO 05:37:02 -54.2 Dark Up 73.7 97.5 Up 05:33:36 - 05:40:28 3589
Madras/Culver 05:37:12 -53.6 Dark Up 72.3 91.1 Up 05:33:46 - 05:40:38 3546
Sisters 05:37:14 -53.4 Dark Up 72.0 89.7 Up 05:33:48 - 05:40:40 3533
Redmond 05:37:13 -53.7 Dark Up 72.3 89.9 Up 05:33:47 - 05:40:39 3515
Bend 05:37:14 -53.7 Dark Up 72.2 89.2 Up 05:33:48 - 05:40:40 3500
Oregon Observatory 05:37:15 -53.7 Dark Up 72.1 88.6 Up 05:33:49 - 05:40:41 3489
La Pine/Gilchrist 05:37:16 -53.8 Dark Up 72.0 87.9 Up 05:33:50 - 05:40:42 3473
North Lake 05:37:15 -54.4 Dark Up 72.4 86.9 Up 05:33:49 - 05:40:41 3407
Chiloquin 05:37:19 -54.1 Dark Up 71.7 84.3 Up 05:33:53 - 05:40:45 3383
Klamath Falls 05:37:20 -54.3 Dark Up 71.7 83.3 Up 05:33:54 - 05:40:46 3347
Paisley 05:37:15 -54.9 Dark Up 72.7 85.3 Up 05:33:49 - 05:40:41 3340
Tulelake 05:37:20 -54.6 Dark Up 71.9 82.6 Up 05:33:54 - 05:40:46 3309
Lakeview 05:37:16 -55.2 Dark Up 72.8 83.8 Up 05:33:50 - 05:40:42 3284
Fall River/Burney 05:37:22 -55.0 Dark Up 71.8 79.9 Up 05:33:56 - 05:40:48 3220
Cedarville 05:37:17 -55.6 Dark Up 72.8 81.8 Up 05:33:51 - 05:40:43 3214
Susanville 05:37:21 -55.8 Dark Up 72.3 78.2 Up 05:33:55 - 05:40:47 3128
Greenville 05:37:23 -55.7 Dark Up 72.0 77.3 Up 05:33:57 - 05:40:49 3115
Gimple 05:37:23 -55.8 Dark Up 72.1 77.3 Up 05:33:57 - 05:40:49 3111
Quincy 05:37:23 -55.8 Dark Up 72.0 76.7 Up 05:33:57 - 05:40:49 3095
Portola 05:37:22 -56.2 Dark Up 72.3 76.3 Up 05:33:56 - 05:40:48 3062
Reno 05:37:21 -56.8 Dark Up 72.7 75.5 Up 05:33:55 - 05:40:47 3009
Carson City 05:37:22 -56.9 Dark Up 72.6 74.4 Up 05:33:56 - 05:40:48 2974
Gardnerville 05:37:22 -57.1 Dark Up 72.6 73.7 Up 05:33:56 - 05:40:48 2948
Yerington 05:37:20 -57.5 Dark Up 73.0 73.8 Up 05:33:54 - 05:40:46 2928
Hawthorne 05:37:19 -58.0 Dark Up 73.3 72.3 Up 05:33:53 - 05:40:45 2860
Lee Vining 05:37:23 -57.9 Dark Up 72.8 70.6 Up 05:33:57 - 05:40:49 2827
Tonopah 05:37:16 -59.2 Dark Up 74.2 70.4 Up 05:33:50 - 05:40:42 2755
Bishop 05:37:22 -58.7 Dark Up 73.1 68.6 Up 05:33:56 - 05:40:48 2738
Lone Pine 05:37:22 -59.2 Dark Up 73.0 66.1 Up 05:33:56 - 05:40:48 2649
CPSLO 05:37:34 -57.7 Dark Up 70.6 63.7 Up 05:34:08 - 05:41:00 2640
Beatty 05:37:17 -60.0 Dark Up 74.1 66.4 Up 05:33:51 - 05:40:43 2623
Indian Springs 05:37:14 -60.9 Dark Up 74.7 64.7 Up 05:33:48 - 05:40:40 2546
Niwot 05:36:30 -65.5 Dark Up 83.6 73.1 Up 05:33:04 - 05:39:56 2524
Henderson 05:37:13 -61.7 Dark Up 75.0 62.4 Up 05:33:47 - 05:40:39 2465
Wildwood 05:37:30 -59.7 Dark Up 71.5 59.4 Up 05:34:04 - 05:40:56 2430
Searchlight/Boulder City 05:37:14 -62.0 Dark Up 74.8 60.5 Up 05:33:48 - 05:40:40 2405
Laughlin/Bullhead City 05:37:13 -62.3 Dark Up 74.9 59.2 Up 05:33:47 - 05:40:39 2362
Patrick 05:37:10 -62.8 Dark Up 75.5 59.3 Up 05:33:44 - 05:40:36 2357
Kingman/Dolan Springs 05:37:12 -62.7 Dark Up 75.2 58.8 Up 05:33:46 - 05:40:38 2343
Mohave Valley 05:37:14 -62.5 Dark Up 74.7 58.4 Up 05:33:48 - 05:40:40 2334
Idyllwild 05:37:24 -61.2 Dark Up 72.6 57.0 Up 05:33:58 - 05:40:50 2311
DCO 05:37:08 -63.4 Dark Up 75.8 57.6 Up 05:33:42 - 05:40:34 2298
Lake Havasu City 05:37:14 -62.8 Dark Up 74.7 56.9 Up 05:33:48 - 05:40:40 2285
Parker 05:37:15 -63.0 Dark Up 74.5 55.8 Up 05:33:49 - 05:40:41 2249
Blythe 05:37:17 -62.9 Dark Up 74.0 54.6 Up 05:33:51 - 05:40:43 2209
Calipatria 05:37:21 -62.4 Dark Up 73.1 54.2 Up 05:33:55 - 05:40:47 2200
Yuma 05:37:19 -63.2 Dark Up 73.5 52.1 Up 05:33:53 - 05:40:45 2119

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 2018/02/13 17:09:07 UT

Marc W. Buie, Southwest Research Institute

RECON