RECON: TNO occultation with 310071

Event between (310071) 10KR59 and star GA0680:06183306 with event index number of 338758

Geocentric closest approach at 2020/05/09 05:48:19 UTC

J2000 position of star is 15:16:53.6 -20:11:52
Equinox of date position of star is 15:18:03.3 -20:16:16
Stellar brightness G=16.3, use SENSEUP=128
Star is 22 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 18.1 AU from the Sun and 17.1 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The 1-sigma error in the time of the event is 62 seconds.
The 1-sigma cross-track error in the shadow position is 1092 km.
The sky-plane scale is 12371.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=182.0 km assuming a 5% albedo -- 2.7 sec chord
Diameter=74.3 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 310071, (2020/05/09 05:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.5 -26:28:32  0.9 17.75   7
7Del Sco       16:01:32.4 -22:40:41  2.3 10.39  12
PPM 264038     15:17:34.1 -22:28:24  5.5  2.20  22
PPM 264063     15:19:01.4 -20:47:45  8.2  0.57  21
PPM 264042     15:17:55.3 -20:04:32  8.8  0.20  22
310071         15:18:03.8 -20:16:18 16.3        21
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 10.2 km RECON observability=0.5 and success probability=2.4%
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 05:50:36 -17.0 AT Up 13.6 147.9 Really Low 05:44:57 - 05:56:14 3744
Kelowna 05:50:37 -17.3 AT Up 13.9 147.7 Really Low 05:44:58 - 05:56:15 3722
Peachland 05:50:38 -17.3 AT Up 13.9 147.4 Really Low 05:44:59 - 05:56:16 3710
Summerland 05:50:38 -17.5 AT Up 14.1 147.5 Really Low 05:44:59 - 05:56:16 3705
Penticton 05:50:38 -17.6 AT Up 14.2 147.6 Really Low 05:44:59 - 05:56:16 3704
Oliver 05:50:38 -17.9 AT Up 14.5 147.6 Really Low 05:45:00 - 05:56:17 3686
Anarchist Mountain Observatory 05:50:38 -18.1 Dark Up 14.7 147.7 Really Low 05:45:00 - 05:56:17 3682
Tonasket 05:50:39 -18.3 Dark Up 14.9 147.6 Really Low 05:45:00 - 05:56:17 3665
Okanogan 05:50:40 -18.6 Dark Up 15.1 147.4 Really Low 05:45:01 - 05:56:18 3644
Brewster 05:50:41 -18.7 Dark Up 15.3 147.2 Really Low 05:45:02 - 05:56:19 3625
Manson/Chelan 05:50:42 -18.8 Dark Up 15.3 146.8 Really Low 05:45:04 - 05:56:21 3606
Entiat 05:50:43 -18.9 Dark Up 15.5 146.8 Really Low 05:45:04 - 05:56:21 3592
Wenatchee 05:50:43 -19.1 Dark Up 15.7 146.6 Really Low 05:45:05 - 05:56:22 3577
Victoria 05:50:49 -17.1 AT Up 13.6 144.1 Really Low 05:45:10 - 05:56:27 3562
Ellensburg 05:50:45 -19.4 Dark Up 15.9 146.4 Really Low 05:45:06 - 05:56:23 3549
Pasco 05:50:42 -20.5 Dark Up 17.1 147.5 Really Low 05:45:04 - 05:56:21 3542
PNWRO 05:50:42 -20.8 Dark Up 17.4 147.7 Really Low 05:45:04 - 05:56:21 3534
Yakima 05:50:45 -19.7 Dark Up 16.3 146.3 Really Low 05:45:07 - 05:56:24 3527
Toppenish/White Swan 05:50:45 -20.0 Dark Up 16.5 146.4 Really Low 05:45:07 - 05:56:24 3519
Niwot 05:50:06 -30.3 Dark Up 27.1 159.6 Low 05:44:28 - 05:55:45 3513
SwRI 05:50:07 -30.4 Dark Up 27.1 159.4 Low 05:44:28 - 05:55:45 3504
Goldendale 05:50:48 -20.3 Dark Up 16.8 145.9 Really Low 05:45:09 - 05:56:26 3478
The Dalles 05:50:49 -20.3 Dark Up 16.9 145.6 Really Low 05:45:11 - 05:56:28 3456
Maupin 05:50:49 -20.7 Dark Up 17.2 145.6 Really Low 05:45:11 - 05:56:28 3435
Redmond 05:50:51 -21.5 Dark Up 18.0 145.4 Really Low 05:45:12 - 05:56:29 3381
Sisters 05:50:52 -21.3 Dark Up 17.8 145.0 Really Low 05:45:13 - 05:56:30 3372
Bend 05:50:52 -21.6 Dark Up 18.1 145.2 Really Low 05:45:13 - 05:56:30 3365
Oregon Observatory 05:50:52 -21.7 Dark Up 18.2 145.1 Really Low 05:45:14 - 05:56:31 3351
La Pine/Gilchrist 05:50:53 -21.8 Dark Up 18.3 145.0 Really Low 05:45:14 - 05:56:31 3337
North Lake 05:50:52 -22.4 Dark Up 18.9 145.4 Really Low 05:45:14 - 05:56:31 3327
Paisley 05:50:52 -23.0 Dark Up 19.5 145.6 Really Low 05:45:13 - 05:56:30 3303
Lakeview 05:50:52 -23.5 Dark Up 20.0 145.7 Low 05:45:13 - 05:56:30 3277
Klamath Falls 05:50:56 -22.9 Dark Up 19.4 144.4 Really Low 05:45:17 - 05:56:34 3242
Cedarville 05:50:52 -24.2 Dark Up 20.6 145.7 Low 05:45:14 - 05:56:31 3241
Fall River/Burney 05:50:56 -24.0 Dark Up 20.5 144.5 Low 05:45:18 - 05:56:35 3178
Susanville 05:50:55 -24.9 Dark Up 21.3 145.1 Low 05:45:16 - 05:56:33 3157
Gimple 05:50:56 -25.0 Dark Up 21.5 144.8 Low 05:45:18 - 05:56:35 3134
Greenville 05:50:56 -25.0 Dark Up 21.4 144.7 Low 05:45:18 - 05:56:35 3132
Reno 05:50:54 -26.0 Dark Up 22.4 145.6 Low 05:45:15 - 05:56:32 3124
Portola 05:50:55 -25.5 Dark Up 21.9 145.1 Low 05:45:17 - 05:56:34 3124
Quincy 05:50:57 -25.2 Dark Up 21.6 144.7 Low 05:45:18 - 05:56:35 3119
Yerington 05:50:53 -26.7 Dark Up 23.2 146.1 Low 05:45:14 - 05:56:31 3105
Carson City 05:50:54 -26.3 Dark Up 22.7 145.5 Low 05:45:16 - 05:56:33 3101
Tonopah 05:50:48 -28.3 Dark Up 24.8 147.6 Low 05:45:09 - 05:56:26 3095
Hawthorne 05:50:52 -27.3 Dark Up 23.8 146.4 Low 05:45:13 - 05:56:30 3088
Gardnerville 05:50:54 -26.5 Dark Up 23.0 145.5 Low 05:45:16 - 05:56:33 3086
Lee Vining 05:50:54 -27.6 Dark Up 24.0 145.9 Low 05:45:15 - 05:56:32 3038
Indian Springs 05:50:45 -30.2 Dark Up 26.7 148.6 Low 05:45:06 - 05:56:23 3036
Beatty 05:50:48 -29.5 Dark Up 25.9 147.7 Low 05:45:09 - 05:56:26 3029
Henderson 05:50:43 -30.9 Dark Up 27.4 149.1 Low 05:45:04 - 05:56:21 3017
Bishop 05:50:52 -28.4 Dark Up 24.9 146.4 Low 05:45:14 - 05:56:31 3017
Patrick 05:50:40 -31.9 Dark Up 28.4 150.0 Low 05:45:01 - 05:56:18 3004
DCO 05:50:38 -32.5 Dark Up 29.0 150.6 Low 05:44:59 - 05:56:16 3002
Kingman/Dolan Springs 05:50:41 -32.0 Dark Up 28.5 149.8 Low 05:45:02 - 05:56:19 2984
Searchlight/Boulder City 05:50:43 -31.5 Dark Up 27.9 149.1 Low 05:45:05 - 05:56:22 2980
Laughlin/Bullhead City 05:50:42 -31.8 Dark Up 28.3 149.3 Low 05:45:04 - 05:56:21 2968
Mohave Valley 05:50:42 -32.1 Dark Up 28.6 149.2 Low 05:45:04 - 05:56:21 2949
George/Scottsdale 05:50:34 -34.2 Dark Up 30.7 151.5 Up 05:44:55 - 05:56:12 2938
Lake Havasu City 05:50:42 -32.5 Dark Up 29.0 149.4 Low 05:45:03 - 05:56:20 2928
Parker 05:50:43 -32.9 Dark Up 29.3 149.3 Low 05:45:04 - 05:56:21 2904
Blythe 05:50:44 -33.2 Dark Up 29.7 148.8 Low 05:45:05 - 05:56:22 2858
CPSLO 05:51:01 -29.1 Dark Up 25.5 143.8 Low 05:45:23 - 05:56:40 2810
Idyllwild 05:50:51 -32.2 Dark Up 28.6 146.9 Low 05:45:12 - 05:56:29 2810
Calipatria 05:50:47 -33.2 Dark Up 29.7 147.8 Low 05:45:08 - 05:56:25 2797
Yuma 05:50:45 -34.0 Dark Up 30.4 148.5 Up 05:45:06 - 05:56:23 2790
Wildwood 05:50:57 -31.1 Dark Up 27.5 145.3 Low 05:45:18 - 05:56:35 2782

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 310071, (2020/05/09 05:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.75   7
7Del Sco       16:00:20.0 -22:37:18  2.3 10.39  12
PPM 264038     15:16:23.0 -22:23:58  5.5  2.20  22
PPM 264063     15:17:51.0 -20:43:20  8.2  0.57  21
PPM 264042     15:16:45.2 -20:00:06  8.8  0.20  22
310071         15:16:53.6 -20:11:52 16.3        22
Positions are for J2000

Event circumstances last updated at 2020/03/16 21:33:07 UT

Marc W. Buie, Southwest Research Institute

RECON