RECON: TNO occultation with 500828

Event between (500828) 13GR136 and star GA0740:05264329 with event index number of 316979

Geocentric closest approach at 2020/01/12 13:44:52 UTC

J2000 position of star is 14:45:52.8 -15:19:58
Equinox of date position of star is 14:46:58.5 -15:24:55
Stellar brightness G=14.8, use SENSEUP=128
Star is 88 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 40.8 AU from the Sun and 41.1 AU from the Earth.
The TNO is moving 16.3 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 854 seconds.
The 1-sigma cross-track error in the shadow position is 4257 km.
The sky-plane scale is 29816.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.8
Diameter=166.0 km assuming a 5% albedo -- 10.2 sec chord
Diameter=67.8 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 7:4EEE
 
 
 
 
 
 

Star training set for 500828, (2020/01/12 13:45UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:15.1 -11:15:55  1.0 20.06  69
27Bet Lib      15:18:05.3 -09:27:20  2.6  9.65  94
5 Lib          14:47:04.2 -15:32:34  6.5  0.13  88
500828         14:46:59.3 -15:24:59 14.8        89
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 1.1 sigma about the mid-time.
The median site spacing is 15.3 km RECON observability=0.7 and success probability=6.0%
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 13:41:41 -20.2 Dark Up 21.1 155.3 Low 13:26:41 - 13:56:41 -2872
Kelowna 13:41:40 -20.2 Dark Up 21.5 155.1 Low 13:26:40 - 13:56:40 -2898
Summerland 13:41:38 -20.3 Dark Up 21.6 154.8 Low 13:26:38 - 13:56:38 -2918
Penticton 13:41:38 -20.2 Dark Up 21.7 154.9 Low 13:26:38 - 13:56:38 -2919
Oliver 13:41:38 -20.2 Dark Up 22.0 154.9 Low 13:26:38 - 13:56:38 -2939
Anarchist Mountain Observatory 13:41:39 -20.0 Dark Up 22.3 155.0 Low 13:26:39 - 13:56:39 -2943
Tonasket 13:41:38 -20.0 Dark Up 22.5 154.9 Low 13:26:38 - 13:56:38 -2964
Okanogan 13:41:37 -20.0 Dark Up 22.8 154.7 Low 13:26:37 - 13:56:37 -2987
Brewster 13:41:36 -20.1 Dark Up 23.0 154.4 Low 13:26:36 - 13:56:36 -3008
Manson/Chelan 13:41:34 -20.3 Dark Up 23.0 154.0 Low 13:26:34 - 13:56:34 -3031
Entiat 13:41:34 -20.4 Dark Up 23.2 153.9 Low 13:26:34 - 13:56:34 -3046
Wenatchee 13:41:33 -20.4 Dark Up 23.4 153.8 Low 13:26:33 - 13:56:33 -3064
Victoria 13:41:23 -22.6 Dark Up 21.5 150.9 Low 13:26:23 - 13:56:23 -3081
Ellensburg 13:41:31 -20.5 Dark Up 23.7 153.4 Low 13:26:31 - 13:56:31 -3095
Niwot 13:42:39 -7.7 NT Up 33.9 169.0 Up 13:27:39 - 13:57:39 -3101
Pasco 13:41:38 -19.3 Dark Up 24.8 154.8 Low 13:26:38 - 13:56:38 -3102
PNWRO 13:41:37 -19.1 Dark Up 25.1 154.9 Low 13:26:37 - 13:56:37 -3110
SwRI 13:42:38 -7.7 NT Up 34.0 168.9 Up 13:27:38 - 13:57:38 -3111
Yakima 13:41:31 -20.4 Dark Up 24.1 153.3 Low 13:26:31 - 13:56:31 -3120
Toppenish/White Swan 13:41:32 -20.2 Dark Up 24.3 153.5 Low 13:26:32 - 13:56:32 -3129
Goldendale 13:41:29 -20.4 Dark Up 24.7 152.9 Low 13:26:29 - 13:56:29 -3175
The Dalles 13:41:28 -20.6 Dark Up 24.8 152.5 Low 13:26:28 - 13:56:28 -3200
Maupin 13:41:28 -20.5 Dark Up 25.2 152.5 Low 13:26:28 - 13:56:28 -3224
Redmond 13:41:26 -20.4 Dark Up 25.9 152.2 Low 13:26:26 - 13:56:26 -3285
Sisters 13:41:25 -20.7 Dark Up 25.8 151.8 Low 13:26:25 - 13:56:25 -3295
Bend 13:41:26 -20.5 Dark Up 26.1 152.0 Low 13:26:26 - 13:56:26 -3302
Oregon Observatory 13:41:24 -20.5 Dark Up 26.2 151.9 Low 13:26:24 - 13:56:24 -3318
La Pine/Gilchrist 13:41:24 -20.5 Dark Up 26.3 151.7 Low 13:26:24 - 13:56:24 -3333
North Lake 13:41:28 -20.0 Dark Up 26.9 152.3 Low 13:26:28 - 13:56:28 -3344
Paisley 13:41:28 -19.6 Dark Up 27.5 152.5 Low 13:26:28 - 13:56:28 -3371
Lakeview 13:41:29 -19.4 Dark Up 28.1 152.6 Low 13:26:29 - 13:56:29 -3399
Cedarville 13:41:28 -19.1 Dark Up 28.7 152.6 Low 13:26:28 - 13:56:28 -3438
Klamath Falls 13:41:21 -20.5 Dark Up 27.5 151.1 Low 13:26:21 - 13:56:21 -3439
Fall River/Burney 13:41:23 -19.9 Dark Up 28.7 151.2 Low 13:26:23 - 13:56:23 -3509
Susanville 13:41:26 -19.2 Dark Up 29.5 151.8 Low 13:26:26 - 13:56:26 -3531
Gimple 13:41:24 -19.3 Dark Up 29.7 151.5 Low 13:26:24 - 13:56:24 -3557
Greenville 13:41:23 -19.4 Dark Up 29.7 151.4 Low 13:26:23 - 13:56:23 -3559
Reno 13:41:30 -18.4 Dark Up 30.6 152.4 Up 13:26:30 - 13:56:30 -3566
Portola 13:41:25 -19.0 Dark Up 30.1 151.8 Up 13:26:25 - 13:56:25 -3568
Quincy 13:41:23 -19.4 Dark Up 29.8 151.4 Low 13:26:23 - 13:56:23 -3574
Yerington 13:41:30 -17.8 AT Up 31.3 153.0 Up 13:26:30 - 13:56:30 -3586
Carson City 13:41:30 -18.3 Dark Up 30.9 152.4 Up 13:26:30 - 13:56:30 -3591
Tonopah 13:41:40 -16.0 AT Up 32.8 154.8 Up 13:26:40 - 13:56:40 -3592
Hawthorne 13:41:33 -17.3 AT Up 31.9 153.4 Up 13:26:33 - 13:56:33 -3602
Gardnerville 13:41:29 -18.2 Dark Up 31.2 152.3 Up 13:26:29 - 13:56:29 -3607
Indian Springs 13:41:47 -14.4 AT Up 34.7 156.1 Up 13:26:47 - 13:56:47 -3652
Lee Vining 13:41:30 -17.5 AT Up 32.3 152.7 Up 13:26:30 - 13:56:30 -3658
Beatty 13:41:41 -15.4 AT Up 34.0 155.0 Up 13:26:41 - 13:56:41 -3662
Henderson 13:41:50 -13.7 AT Up 35.4 156.8 Up 13:26:50 - 13:56:50 -3670
Bishop 13:41:34 -16.8 AT Up 33.1 153.3 Up 13:26:34 - 13:56:34 -3679
Patrick 13:41:55 -12.7 AT Up 36.4 157.9 Up 13:26:55 - 13:56:55 -3680
DCO 13:41:59 -12.0 AT Up 36.9 158.6 Up 13:26:59 - 13:56:59 -3681
Kingman/Dolan Springs 13:41:56 -12.8 AT Up 36.5 157.6 Up 13:26:56 - 13:56:56 -3703
Searchlight/Boulder City 13:41:51 -13.5 AT Up 36.0 156.7 Up 13:26:51 - 13:56:51 -3710
Laughlin/Bullhead City 13:41:52 -13.2 AT Up 36.4 157.0 Up 13:26:52 - 13:56:52 -3721
Mohave Valley 13:41:52 -13.1 AT Up 36.6 156.9 Up 13:26:52 - 13:56:52 -3742
George/Scottsdale 13:42:06 -10.5 NT Up 38.6 159.8 Up 13:27:06 - 13:57:06 -3744
Lake Havasu City 13:41:54 -12.8 AT Up 37.1 157.1 Up 13:26:54 - 13:56:54 -3764
Parker 13:41:53 -12.6 AT Up 37.4 157.0 Up 13:26:53 - 13:56:53 -3789
Blythe 13:41:51 -12.7 AT Up 37.8 156.5 Up 13:26:51 - 13:56:51 -3839
Idyllwild 13:41:42 -14.5 AT Up 36.9 154.1 Up 13:26:42 - 13:56:42 -3898
Calipatria 13:41:49 -13.3 AT Up 37.9 155.3 Up 13:26:49 - 13:56:49 -3907
CPSLO 13:41:22 -18.1 Dark Up 34.0 150.2 Up 13:26:22 - 13:56:22 -3908
Yuma 13:41:52 -12.5 AT Up 38.6 156.2 Up 13:26:52 - 13:56:52 -3911
Wildwood 13:41:32 -16.1 AT Up 35.9 152.1 Up 13:26:32 - 13:56:32 -3933

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 500828, (2020/01/12 13:45UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 20.06  69
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.65  94
5 Lib          14:45:57.7 -15:27:34  6.5  0.13  88
500828         14:45:52.8 -15:19:58 14.8        88
Positions are for J2000

Event circumstances last updated at 2019/10/15 22:05:16 UT

Marc W. Buie, Southwest Research Institute

RECON