RECON: TNO occultation with 01KO77

Event between 01KO77 and star GA0740:12936606 with event index number of 288913

Geocentric closest approach at 2020/09/25 03:25:24 UTC

J2000 position of star is 17:52:25.2 -14:39:46
Equinox of date position of star is 17:53:29.6 -14:39:58
Stellar brightness G=16.3, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 61% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 37.6 AU from the Sun and 37.6 AU from the Earth.
The TNO is moving 8.1 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 809 seconds.
The 1-sigma cross-track error in the shadow position is 2964 km.
The sky-plane scale is 27286.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 22.9 sec chord
Diameter=75.3 km assuming a 30% albedo -- 9.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 01KO77, (2020/09/25 03:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.9 -26:28:34  0.9 22.67  36
35Eta Oph      17:11:34.1 -15:44:57  2.6 10.20  29
PPM 233599     17:48:47.8 -14:43:55  5.9  1.16  21
PPM 233690     17:53:15.4 -15:01:47  8.2  0.37  20
PPM 233691     17:53:16.6 -14:39:38  9.9  0.08  20
01KO77         17:53:36.2 -14:39:59 16.3        20
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 8.0 km RECON observability=1.0 and success probability=4.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 03:24:54 -15.9 AT Up 20.8 209.2 Low 03:09:54 - 03:39:54 4201
Summerland 03:24:50 -15.7 AT Up 21.0 208.9 Low 03:09:50 - 03:39:50 4193
Penticton 03:24:54 -16.0 AT Up 21.2 209.1 Low 03:09:54 - 03:39:54 4186
Okanagan Falls 03:24:56 -16.0 AT Up 21.4 209.2 Low 03:09:56 - 03:39:56 4179
Oliver 03:24:53 -16.1 AT Up 21.5 209.2 Low 03:09:53 - 03:39:53 4174
Anarchist Mountain Observatory 03:25:00 -16.2 AT Up 21.6 209.4 Low 03:10:00 - 03:40:00 4172
Oroville 03:24:57 -16.2 AT Up 21.7 209.4 Low 03:09:57 - 03:39:57 4168
Tonasket 03:25:01 -16.3 AT Up 21.9 209.4 Low 03:10:01 - 03:40:01 4160
Okanogan 03:25:02 -16.3 AT Up 22.2 209.4 Low 03:10:02 - 03:40:02 4146
Brewster 03:25:00 -16.3 AT Up 22.5 209.2 Low 03:10:00 - 03:40:00 4133
Manson/Chelan 03:25:01 -16.1 AT Up 22.8 208.9 Low 03:10:01 - 03:40:01 4120
Entiat 03:25:00 -16.1 AT Up 23.1 208.9 Low 03:10:00 - 03:40:00 4110
Wenatchee 03:25:00 -16.1 AT Up 23.3 208.8 Low 03:10:00 - 03:40:00 4099
Ellensburg 03:25:02 -16.1 AT Up 23.7 208.7 Low 03:10:02 - 03:40:02 4081
Pasco 03:25:21 -17.3 AT Up 23.9 210.3 Low 03:10:21 - 03:40:21 4076
PNWRO 03:25:23 -17.5 AT Up 24.0 210.6 Low 03:10:23 - 03:40:23 4070
Yakima 03:25:04 -16.2 AT Up 24.1 208.8 Low 03:10:04 - 03:40:04 4065
Toppenish/White Swan 03:25:07 -16.4 AT Up 24.2 209.0 Low 03:10:07 - 03:40:07 4059
George/Umatilla 03:25:22 -17.3 AT Up 24.2 210.2 Low 03:10:22 - 03:40:22 4059
Goldendale 03:25:09 -16.3 AT Up 24.9 208.7 Low 03:10:09 - 03:40:09 4030
The Dalles 03:25:08 -16.1 AT Up 25.2 208.4 Low 03:10:08 - 03:40:08 4015
Maupin 03:25:07 -16.3 AT Up 25.5 208.6 Low 03:10:07 - 03:40:07 4000
Niwot 03:28:06 -29.5 Dark Up 22.1 225.6 Low 03:13:06 - 03:43:06 3995
Madras/Culver 03:25:11 -16.4 AT Up 26.0 208.7 Low 03:10:11 - 03:40:11 3976
Redmond 03:25:14 -16.4 AT Up 26.3 208.7 Low 03:10:14 - 03:40:14 3960
Sisters 03:25:12 -16.2 AT Up 26.4 208.3 Low 03:10:12 - 03:40:12 3954
Bend 03:25:15 -16.4 AT Up 26.6 208.6 Low 03:10:15 - 03:40:15 3948
Oregon Observatory 03:25:14 -16.4 AT Up 26.8 208.5 Low 03:10:14 - 03:40:14 3938
La Pine/Gilchrist 03:25:17 -16.4 AT Up 27.0 208.6 Low 03:10:17 - 03:40:17 3928
North Lake 03:25:26 -16.9 AT Up 27.1 209.3 Low 03:10:26 - 03:40:26 3920
Paisley 03:25:35 -17.4 AT Up 27.5 209.8 Low 03:10:35 - 03:40:35 3902
Lakeview 03:25:38 -17.6 AT Up 27.8 210.2 Low 03:10:38 - 03:40:38 3882
Chiloquin 03:25:18 -16.4 AT Up 28.1 208.5 Low 03:10:18 - 03:40:18 3872
Klamath Falls 03:25:23 -16.6 AT Up 28.3 208.7 Low 03:10:23 - 03:40:23 3858
Cedarville 03:25:44 -18.0 AT Up 28.3 210.6 Low 03:10:44 - 03:40:44 3855
Tulelake 03:25:30 -16.9 AT Up 28.4 209.1 Low 03:10:30 - 03:40:30 3851
Fall River/Burney 03:25:36 -17.2 AT Up 29.2 209.4 Low 03:10:36 - 03:40:36 3809
Susanville 03:25:46 -17.9 AT Up 29.4 210.4 Low 03:10:46 - 03:40:46 3793
Gimple 03:25:46 -17.8 AT Up 29.8 210.3 Low 03:10:46 - 03:40:46 3775
Greenville 03:25:46 -17.8 AT Up 29.8 210.2 Low 03:10:46 - 03:40:46 3774
Portola 03:25:56 -18.2 Dark Up 29.9 210.8 Low 03:10:56 - 03:40:56 3766
Reno 03:26:03 -18.8 Dark Up 29.8 211.6 Low 03:11:03 - 03:41:03 3765
Quincy 03:25:46 -17.8 AT Up 30.0 210.2 Low 03:10:46 - 03:40:46 3764
Yerington 03:26:11 -19.5 Dark Up 30.0 212.4 Up 03:11:11 - 03:41:11 3749
Carson City 03:26:04 -18.9 Dark Up 30.1 211.7 Up 03:11:04 - 03:41:04 3748
Tonopah 03:26:35 -21.3 Dark Up 29.9 214.8 Low 03:11:35 - 03:41:35 3736
Gardnerville 03:26:03 -19.0 Dark Up 30.3 211.8 Up 03:11:03 - 03:41:03 3736
Hawthorne 03:26:19 -20.0 Dark Up 30.2 213.2 Up 03:11:19 - 03:41:19 3735
Lee Vining 03:26:19 -19.8 Dark Up 30.9 212.8 Up 03:11:19 - 03:41:19 3697
Indian Springs 03:26:42 -22.9 Dark Up 30.4 216.8 Up 03:11:42 - 03:41:42 3687
Beatty 03:26:42 -21.9 Dark Up 30.6 215.7 Up 03:11:42 - 03:41:42 3683
Bishop 03:26:28 -20.5 Dark Up 31.0 213.8 Up 03:11:28 - 03:41:28 3679
Henderson 03:26:42 -23.6 Dark Up 30.5 217.7 Up 03:11:42 - 03:41:42 3675
DCO 03:26:42 -25.3 Dark Up 30.3 219.8 Up 03:11:42 - 03:41:42 3670
Patrick 03:26:42 -24.6 Dark Up 30.4 219.0 Up 03:11:42 - 03:41:42 3668
Kingman/Dolan Springs 03:26:42 -24.5 Dark Up 30.7 218.9 Up 03:11:42 - 03:41:42 3653
Searchlight/Boulder City 03:26:42 -23.8 Dark Up 30.9 218.0 Up 03:11:42 - 03:41:42 3647
Lone Pine 03:26:39 -21.0 Dark Up 31.5 214.5 Up 03:11:39 - 03:41:39 3643
Laughlin/Bullhead City 03:26:42 -24.1 Dark Up 31.0 218.4 Up 03:11:42 - 03:41:42 3640
Mohave Valley 03:26:42 -24.2 Dark Up 31.2 218.5 Up 03:11:42 - 03:41:42 3626
Lake Havasu City 03:26:42 -24.5 Dark Up 31.3 218.9 Up 03:11:42 - 03:41:42 3612
Parker 03:26:42 -24.7 Dark Up 31.6 219.1 Up 03:11:42 - 03:41:42 3595
Blythe 03:26:42 -24.6 Dark Up 32.2 219.0 Up 03:11:42 - 03:41:42 3561
CPSLO 03:26:23 -19.2 Dark Up 33.8 212.2 Up 03:11:23 - 03:41:23 3521
Idyllwild 03:26:42 -22.8 Dark Up 33.2 216.9 Up 03:11:42 - 03:41:42 3514
Calipatria 03:26:42 -23.9 Dark Up 33.0 218.3 Up 03:11:42 - 03:41:42 3511
Wildwood 03:26:42 -21.2 Dark Up 33.8 214.8 Up 03:11:42 - 03:41:42 3492
Yuma 03:27:42 -25.0 Dark Up 32.8 219.6 Up 03:12:42 - 03:42:42 3479

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 01KO77, (2020/09/25 03:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.67  36
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.20  29
PPM 233599     17:47:36.7 -14:43:33  5.9  1.16  21
PPM 233690     17:52:04.2 -15:01:34  8.2  0.37  20
PPM 233691     17:52:05.6 -14:39:25  9.9  0.08  20
01KO77         17:52:25.2 -14:39:46 16.3        20
Positions are for J2000

Event circumstances last updated at 2018/10/27 20:29:39 UT

Marc W. Buie, Southwest Research Institute

RECON